Journals >Experiment Science and Technology
Contents
2024
Volume: 22 Issue 1
25 Article(s)
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[in Chinese]
OFDM Wireless Communication System Experiment Based on GNURadio and USRP
Chang WU, Shuyang JIAO, and Chengdong QIAN
In response to the lack of systematic and realistic scenarios in the current wireless communication course, which only focuses on basic theoretical derivation and module function simulation, an orthogonal frequency division multiplexing (OFDM) wireless communication system experiment based on GNURadio software and univIn response to the lack of systematic and realistic scenarios in the current wireless communication course, which only focuses on basic theoretical derivation and module function simulation, an orthogonal frequency division multiplexing (OFDM) wireless communication system experiment based on GNURadio software and universal software radio peripheral (USRP) hardware platform is proposed. The experiment includes mastering the basic principles of OFDM, building an OFDM transceiver system, analyzing relevant communication performance, completing the hardware system, and finally conducting real wireless communication tests to achieve real-time video transmission. Through the synergy of software systems and hardware platforms, students can fully understand the basic principles of wireless communication, the use of various communication modules, the architecture of wireless communication systems, and related performance analysis methods. This experiment spans from theoretical foundation to engineering application, from module verification to system implementation, from ideal environment simulation to actual scenario testing, and comprehensively improves engineering literacy..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 1 (2024)
Design of a Three-dimensional Swelling Force Measuring Instrument for Rock Considering Temperature and Its Teaching Experiment
Baolong ZHU, and Long REN
Swelling force is one of the important characteristics of the expansive rock. A method and experimental device for measuring the three-way swelling force of rock considering the effect of temperature are proposed. Based on the experimental design, the swelling force tests of black shale and red mudstone were carried ouSwelling force is one of the important characteristics of the expansive rock. A method and experimental device for measuring the three-way swelling force of rock considering the effect of temperature are proposed. Based on the experimental design, the swelling force tests of black shale and red mudstone were carried out with this device, and the time history curves of the swelling force of the two kinds of rocks at different temperatures were obtained. The swelling force of black shale and red shale over time was analyzed, and compared with the swelling force of two kinds of rocks calculated based on the principle of elasticity, the influence of temperature on the swelling force of two kinds of rocks was further compared. The device has clear structure and simple operation, which is more conducive to students’ understanding of rock swelling force, and is also a supplement to the teaching content of rock mechanics experiment..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 9 (2024)
Development and Application of Gas Flow Bubbling Generator
Lu DI
With the continuous consumption of global fossil resources, the conversion of renewable resources has become the focus of scientific researchers. The catalytic conversion reaction of bio-based lower alcohols obtained by the biological or chemical conversion of biomass is a hot research topic in recent years. In order tWith the continuous consumption of global fossil resources, the conversion of renewable resources has become the focus of scientific researchers. The catalytic conversion reaction of bio-based lower alcohols obtained by the biological or chemical conversion of biomass is a hot research topic in recent years. In order to efficiently explore a variety of model catalytic reactions, a gaseous flow bubbling generator is developed to replace the feeding process of the traditional fixed-bed reactor. The purpose is to carry out different model catalytic reaction exploration experiments. By comparing the experimental results of the two equipments, it is shown that the gas flow bubbling generator has the characteristics of small error, fast test and simple operation. In addition, the advantages of its small footprint and portability are just right for a variety of in-situ characterization techniques. By combining the gas flow bubbling generator with the in-situ diffuse reflection infrared spectroscopy, students are able to study the theoretical knowledge of the infrared spectroscopy and the working principles of instruments, and integrate the basic knowledge on catalysis that have learned. The gas flow bubbling generator not only assists the exploration of scientific research experiments, but also can be extended to the application of experimental teaching, which improves students’ scientific research innovation ability, and provides a new paradigm for the integration of science and education and the integration of teaching and research..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 16 (2024)
Fusion Experimental Method of Soft Biometrics Based on Personalized Least Squares
Qing ZHANG, and Yangyang ZHANG
In the study of biometrics recognition, the fusion experiment of soft biometrics has always adopted the fusion model between the main features. Soft biometrics are different from the main features in terms of application scope, recognition ability, etc. The fusion mechanism between the main features cannot effectively In the study of biometrics recognition, the fusion experiment of soft biometrics has always adopted the fusion model between the main features. Soft biometrics are different from the main features in terms of application scope, recognition ability, etc. The fusion mechanism between the main features cannot effectively mine and utilize the discrimination information in the soft biometrics, resulting in less ideal and accurate experimental results. Based on this, this paper deeply analyzes the characteristics of soft biometrics, and puts forward the requirements of ‘effective complementarity’ and ‘personalized fusion’. Based on the quantified effective complementarity, and combined with the goal of ‘minimum error rate’, this paper establishes a local fusion model for each user using the least squares method. The proposed fusion model is applied in face and fingerprint recognition experimental scenarios to verify the rationality of the analysis and the effectiveness of the proposed method in promoting the recognition performance..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 22 (2024)
Fault Diagnosis Method of Inter-turn Short Circuit of Dry-type Air-core Reactor Based on the Magnetic Field Detection
Wei LI, Zhihong WANG, Zihan LIAO, Weidong LIU, Jinsong FU, Jin ZHANG, and Yanzhen ZHAO
Inter-turn short circuit fault is the most common fault of dry-type air-core reactor, which may cause insulation damage, fire or even burn out of the reactor in serious cases. It is of great significance for the safe operation of the power system to diagnose the inter-turn short circuit fault as early as possible and gInter-turn short circuit fault is the most common fault of dry-type air-core reactor, which may cause insulation damage, fire or even burn out of the reactor in serious cases. It is of great significance for the safe operation of the power system to diagnose the inter-turn short circuit fault as early as possible and give effective early warning. A new method is presented for diagnosis of inter-turn short circuit of dry-type air-core reactor based on magnetic field detection: detection coils that are independent of the reactor body and coaxial with the reactor winding are installed up and down. By adopting the mathematical statistics 3σ Criterion model and algorithm to detect the changes of the induced voltage of the detection coils, the inter turn short circuit fault of the reactor is determined and early warning and alarm are given. In order to verify the effectiveness of the proposed method, the induced voltage changes of the detection coils are simulated and analyzed when inter turn short circuit faults occur at different positions of a BKGKL-20000-35 dry type air-core reactor based on the finite element numerical calculation software. The proposed method has also been validated through on-site prototype testing. It is reliable and effective, and can be widely applied in practical power systems..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 30 (2024)
Design of Simulation Training Platform for Automation Production Line Based on PLCSIM Advanced and Simulink
Cuijuan AN, Kai ZHANG, Guoxia WANG, Min ZHANG, Dawei DING, and Shanlei WU
In order to solve the problems of hardware equipment, experimental duration, and limited space in the offline course of “Automated Production Line Training”, and improve the teaching quality and effectiveness, a simulation training platform for automated production lines based on PLCSIM Advanced and Simulink is designeIn order to solve the problems of hardware equipment, experimental duration, and limited space in the offline course of “Automated Production Line Training”, and improve the teaching quality and effectiveness, a simulation training platform for automated production lines based on PLCSIM Advanced and Simulink is designed. This platform is based on the physical training equipment in the laboratory, and uses Simulink to build a simulation model of the controlled object. Control algorithms are written in the PLCSIM Advanced simulation controller, through API communication the real-time exchange between object model and controller data is achieved and simulated. Taking the paper tension control system as an example, the construction and implementation process of the simulation training platform are introduced. Practical teaching has shown that this platform has improved the teaching effectiveness, stimulated students’ interest in practical learning, improved their ability to discover and solve complex engineering problems, and made students deeply realize the importance of teamwork and effective communication..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 37 (2024)
Research and Application of Virtual Simulation in Oceanographic Survey Experiment Teaching
Zizhou LIU, Fangguo ZHAI, Xu CHEN, Jing MENG, and Xinshun GUO
Oceanographic survey experiment teaching is an important part of marine science talent cultivation. Limited by experimental conditions, it cannot fully meet the teaching requirements by relying solely on the marine practice. New teaching methods need to be introduced. Firstly, this paper introduces the construction ideOceanographic survey experiment teaching is an important part of marine science talent cultivation. Limited by experimental conditions, it cannot fully meet the teaching requirements by relying solely on the marine practice. New teaching methods need to be introduced. Firstly, this paper introduces the construction ideas of virtual simulation in the oceanographic survey experiment teaching and the different forms at different stages, under the background of the rapid development of the virtual simulation technology. Then, combined withddd the “virtual simulation experiment of offshore physical ocean comprehensive survey”, which is currently used in the undergraduate teaching, this paper systematically expounds the experimental module, experimental steps and main functions. Finally, a summary is made on the teaching effectiveness and the future development of oceanographic survey virtual simulation teaching is prospected..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 44 (2024)
Research on Experimental Teaching of the Internet of Things Technology Course Based on CDIO Concept
Chunyue ZHOU, Mingyue SONG, Dan TAO, Wenshan ZHAO, and Ruipeng GAO
As an important part of theddd national strategic emerging industry, the Internet of Things deeply integrates the new generation of the information technology, and also brings great demand for the application-oriented talents of the Internet of Things. In view of the imperfections of the Internet of Things technology iAs an important part of theddd national strategic emerging industry, the Internet of Things deeply integrates the new generation of the information technology, and also brings great demand for the application-oriented talents of the Internet of Things. In view of the imperfections of the Internet of Things technology in the practice of teaching reform, based on the engineering education concept of CDIO, aiming at practice & innovation, it optimizes the level of practical ability and the contents of experimental teaching around the curriculum knowledge system and the key technology of Internet of Things, so as to achieve the training goal of engineering education step by step. Finally, it summarizes the implementation effect of the open teaching mode of graduate experimental course..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 52 (2024)
Comprehensive Course Experiment of Digital Signal Processing Based on MATLAB
Taoli YANG, and Hanwen YU
Digital signal processing is a course with strong combination of theory and practice. Combined with the characteristics of the remote sensing science and technology and its practical application, a comprehensive course experiment of digital signal processing based on MATLAB is designed. This experiment takes the gravitDigital signal processing is a course with strong combination of theory and practice. Combined with the characteristics of the remote sensing science and technology and its practical application, a comprehensive course experiment of digital signal processing based on MATLAB is designed. This experiment takes the gravity recovery and climate experiment (GRACE) satellite Level 2 data as the research object. Through the operation of signal spectrum analysis, filter design and processing, it can denoise the stripes efficiently and effectively. This comprehensive experiment covers the main key knowledge points of the digital signal processing course, which is helpful for students to form a relatively complete knowledge system of digital signal processing, and cultivates students’ ability to apply abstract theoretical knowledge to actual remote sensing processing..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 57 (2024)
Virtuality-reality Combination Based Experimental Teaching Method of Industrial Robots for Safe Operation
Jun WU, Yu HE, and Shijun SHEN
This paper researches on an experimental teaching method of industrial robots for safe operation, which is based on the combination of virtuality and reality. We design a trajectory generation experiment in limited space from real application. A progressive solution which combines physical model, kinematic calculation This paper researches on an experimental teaching method of industrial robots for safe operation, which is based on the combination of virtuality and reality. We design a trajectory generation experiment in limited space from real application. A progressive solution which combines physical model, kinematic calculation and trajectory generation is proposed. The solution is realized with MATLAB Robotics Toolbox based virtual simulation and domestic industrial robot based physical experiment. At last, a virtuality-reality combination based experiment teaching method is comprehensively proposed. The application effect is validated with a course case. With the teaching method, students can progressively master the operation of industrial robots in a safe manner. They can also design an innovative experiment with the virtuality-reality combinational structure. The teaching method gained good application in experimental courses of industrial robots. In addition, it can be extended to other similar courses with risks..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 62 (2024)
Design and Teaching Practice of the Rutherford Scattering Virtual Simulation Experiment
Lichao TIAN, Xiang ZHANG, Jing JIANG, Xiaohu YANG, Zhongliang LYU, and Zijia ZHAO
Rutherford scattering experiment is one of the classical experiments in the history of nuclear physics. In consideration of the safety of the radiation source, there is few experimental practices of Rutherford scattering theory in domestic and foreign universities, which limits the understanding of micro-structure of aRutherford scattering experiment is one of the classical experiments in the history of nuclear physics. In consideration of the safety of the radiation source, there is few experimental practices of Rutherford scattering theory in domestic and foreign universities, which limits the understanding of micro-structure of atomic nuclei and microscopic interactions with matters. In response to the above questions, a Rutherford scattering virtual simulation experiment was developed based on Unity3D. The experimental scenes are realistically reproduced and the reliability of the experimental data is guaranteed through Monte Carlo simulation. The experiment content covers the use of semiconductor α spectrometers, verification of the differential cross-section formula of Rutherford scattering, and the application of Rutherford back-scattering in material analysis. The virtual simulation experiment provides more references for the experimental teaching of modern physics experiments, nuclear physics experiments, and materials characterization experiments, and enriches the experimental projects for the nuclear physics experimental teaching..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 68 (2024)
Experiment Design and Independent Practice of Broken Wire of Steel Wire Rope Based on Magnetic Flux Leakage Detection
Qian XIAO, Zhiliang LIU, Ping YANG, and Leilei YANG
An education experimental platform based on nondestructive testing of steel wire ropes is designed based on a research project and practical engineering problem. The steel wire rope is magnetized through the excitation mechanism, and the Hall sensor array is used to detect the radial magnetic field of the magnetized stAn education experimental platform based on nondestructive testing of steel wire ropes is designed based on a research project and practical engineering problem. The steel wire rope is magnetized through the excitation mechanism, and the Hall sensor array is used to detect the radial magnetic field of the magnetized steel wire rope, then the signal processing technology is used to identify fault signature, and local flaw of the steel wire rope is finally recognized. This project involves a whole process of the signal through “generation—sensing—acquisition—transmission—recording—processing—application”, and forms a complete closed knowledge cycle. Thus, the students can understand the course knowledge system in an all-round way. It helps to stimulate students’ interest and cultivate students’ scientific research ability and innovation ability..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 76 (2024)
Research on the Experimental Teaching of Electronic Circuit for Non-electrical Disciplines in a Combination Mode of “Virtualization-reality” and “Point-surface”
Zhong ZHENG, Li GU, Wei LU, and Junzhu ZHU
The undergraduates majoring in non-electrical disciplines always feel difficult in studying electronic circuit course for its extensive content and high systematicity. For inadequate instruments, the corresponding experimental course sometimes fall out of step with the theoretical course. Moreover, most experiments aimThe undergraduates majoring in non-electrical disciplines always feel difficult in studying electronic circuit course for its extensive content and high systematicity. For inadequate instruments, the corresponding experimental course sometimes fall out of step with the theoretical course. Moreover, most experiments aim at verification of some specific theoretical concepts with lacking integration. As a result, the experiments could not effectively leverage its strength to play a supporting role for the theoretical course. Aiming at the present problems, a series of visual reality experiments based on Multisim software are designed as supplements. A teaching mode is built by combining “virtualization-reality” and “point-surface”. The physical experiments are designed independently according to each chapter, which focus on helping the undergraduates comprehend the theoretical points and develop hands-on skills in practice. While the VR experiments emphasize connections among the key points from different chapters, which extend the width and depth of experimental contents to cultivate the ability of the students in analyzing and solving concrete problems. Innovations in the experimental teaching mode could effectively motivate the enthusiasm of the students from non-electrical disciplines in studying electronic circuit courses and thus improve the teaching performance of electronic circuit experiments..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 82 (2024)
Comprehensive Experimental Design on Catalytic Ozonation of Toluene over the Hydrotalcite-derived Catalysts
Ye SUN, Mengxin LI, Xinxin JIANG, Haidan LI, Wei HONG, and Tianle ZHU
In order to improve the experimental teaching level, based on the concept of serving air pollution control with material chemistry, a comprehensive experiment of catalytic ozonation of toluene using hydrotalcite-derived catalysts was designed. The experimental plans were designed by students independently, and differenIn order to improve the experimental teaching level, based on the concept of serving air pollution control with material chemistry, a comprehensive experiment of catalytic ozonation of toluene using hydrotalcite-derived catalysts was designed. The experimental plans were designed by students independently, and different preparation methods combined with the high-temperature calcination technology could be selected according to different plans. Modern instrumental analysis methods such as X-ray diffraction (XRD), scanning electron microscopy (SEM), BET, H2-temperature programmed reduction (H2-TPR), NH3-temperature programmed desorption (NH3-TPD), and electron paramagnetic resonance (EPR), were used to characterize physicochemical characterization from the microscopic point of view. This experiment helps students understand the application of materials chemistry in the field of environmental engineering, which is helpful to improve students’ macro-micro combination ability to think innovatively and stimulating students’ interest in scientific research..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 89 (2024)
Construction and Practice of Electric Drive Course Design Based On ILOs
Ruijing LIU, Ting ZHANG, and Meijie WU
Under the background of double first-class construction, course is the core element of talent cultivation. Based on the standard of “high order, innovation, and challenge” and the standard of Beijing Institute of Technology’s Research Course Certification, this paper constructs a research course for the comprehensive eUnder the background of double first-class construction, course is the core element of talent cultivation. Based on the standard of “high order, innovation, and challenge” and the standard of Beijing Institute of Technology’s Research Course Certification, this paper constructs a research course for the comprehensive experimental course “Electric Drive Course Design”, and constructs the intended learning outcomes (ILOs) that integrate advanced knowledge, abilities and qualities. For each ILOs, innovative and challenging teaching content is designed, corresponding teaching strategies are defined, evaluation standards and evaluation feedback mechanisms are formulated, and teaching quality and curriculum level are continuously improved. Practice has proved that the implementation of research courses based on ILOs has cultivated students’ ability to solve complex engineering problems and innovative practical abilities, achieving the training goal of “value shaping, knowledge cultivation and practical ability”..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 95 (2024)
Research of Teaching Professional Basic Experimental Courses
Tianyu ZHU, and Xiujuan TIAN
The experimental course is an important part of the learning content for engineering majors. The resources of experimental courses should meet teaching needs, but in practice, there are still some problems of limited resources, such as insufficient sets of instruments, limited operable functions and limited space for iThe experimental course is an important part of the learning content for engineering majors. The resources of experimental courses should meet teaching needs, but in practice, there are still some problems of limited resources, such as insufficient sets of instruments, limited operable functions and limited space for innovative thinking. In view of the limited resources for basic experimental courses in the School of Materials Science and Engineering of Shandong University of Science and Technology, the existing experimental course resources for the new energy materials and devices major are classified and analyzed, and the idea of optimizing experimental course is put forward. According to the experimental hours and equipment conditions, the study focuses on instrument knowledge, sample preparation, parameter selection, result processing, skills and ideas training. The arrangement of experimental projects and the allocation of equipment are optimized in the course planning. The understanding of application examples is arranged in the knowledge review and learning session. Thinking items and variables are set up in the instrument operation process, so that students can guide each other and find rules. The virtual simulation technology and online resources are introduced in the pre-class preview and after-class self-study link. This provides a new idea for the development of professional technical experiments, comprehensive experiments, and other courses..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 101 (2024)
Exploration on the Curriculum Reform of “Basic Experiment of Communication Electronic Circuits” under the Background of New Engineering
Rui XUE, Shuaichuang WANG, Jingpeng GAO, Yun LIN, and Zhengwei DU
Aiming at the problems of single content setting, insufficient teaching means and unsatisfactory teaching effect of communication electronic circuit experiment, an experimental mode with task as the main line, teachers as the leading factor and student as the main body is proposed, and various teaching methods such as Aiming at the problems of single content setting, insufficient teaching means and unsatisfactory teaching effect of communication electronic circuit experiment, an experimental mode with task as the main line, teachers as the leading factor and student as the main body is proposed, and various teaching methods such as association, inspiration, task-driven and project analogy are integrated. Taking the design of high stability LC sine wave oscillator as an example, three experimental tasks and contents of basic, advanced and extended are designed to meet the different needs of students for experiments with diversified packages. The realization of Clapper, Sealer and crystal oscillator circuits on a circuit board makes it easier for students to grasp the differences and connections of the three circuits. The “project analogy teaching method” is adopted to enable students to master the process and scientific methods of solving typical communication engineering problems through this experiment. Task introduction and ideological and political links are skillfully combined to establish students’ awareness of rejuvenating the country through science and enhance national pride..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 107 (2024)
Multi Experiment Teaching Design of “Big Data and Intelligent Transportation” for Transportation General Course under the Background of Double First-class New Engineering
Qing HE, Zhen LIU, and Qingsong MA
In response to a series of national strategic calls, such as innovation-driven development and “Strong Transportation Country”, and aiming to achieve the goal of reform in new engineering and double first-class teaching, there is a great need in the transportation field to cultivate a group of high-quality composite neIn response to a series of national strategic calls, such as innovation-driven development and “Strong Transportation Country”, and aiming to achieve the goal of reform in new engineering and double first-class teaching, there is a great need in the transportation field to cultivate a group of high-quality composite new technical talents with high practical ability, innovation, and international competitiveness. Therefore, the traditional course of the transportation specialty needs to be adjusted urgently. Taking the transportation general course “Big Data and Intelligent Transportation” as an example, aiming at improving the practical ability, innovation ability, computer ability and other abilities of students majoring in transportation, this paper puts forward new requirements in the course content to lay a foundation for training high-quality composite new engineering talents to meet the needs of the transportation industry. The traditional transportation engineering is combined with the big data technology to carry out the multiple experimental teaching. Each group of experiments adopts actual cases, and uses multi-source data, including space-time data of train travel time estimation, two-dimensional image data of track fastener state classification, and one-dimensional audio data of subway noise, so as to effectively improve students’ innovation and practice ability..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 114 (2024)
Improvement of the Seepage Sealing Method and Test of Rock Based on the True Triaxial Test Device
Pengfei WU, Xiaofei LUO, Jianmei WANG, Xiaoxia SONG, and Jianlong WANG
Most of the existing unconventional oil and gas reservoirs in China are tested with cylindrical samples by the false triaxial test device. However, under the condition of true triaxial, the edges of cube specimens are mostly deficient in edge flow and face seal. Based on the existing true triaxial test device and a larMost of the existing unconventional oil and gas reservoirs in China are tested with cylindrical samples by the false triaxial test device. However, under the condition of true triaxial, the edges of cube specimens are mostly deficient in edge flow and face seal. Based on the existing true triaxial test device and a large number of experiments, the existing seepage sealing method of cube specimen with single rubber sleeve was improved. This paper introduces the structural features of nested sealing sleeve, especially the design of the seal in the edge area, puts forward the structural design of the top and bottom end of the sealing sleeve concave with a single hole mesh groove, and discusses the size of the top pressure transfer plate. Taking the 100 mm×100 mm×100 mm cubic coal sample as an example, the true triaxial seepage test analysis was carried out, and the permeability under different inlet seepage pressures under true triaxial confining pressures was obtained. The improvement of the sealing methodddd is helpful to improve the permeability test accuracy of unconventional oil and gas reservoirs under in-situ stress conditions in scientific research institutions and testing centers, and improve the practical innovation ability and scientific research accomplishment of high-end scientific research talents..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 121 (2024)
Design and Application of Apparatus for Measuring Diffusion Coefficient of Vaporized Solvent in MOF Materials
Feng XUE, Sheng WANG, and Shengui JU
Measuring the diffusion coefficient of the vaporized solvent in the crystal of the solid phase adsorbent is an important adsorption parameter, and the experimental teaching is difficult to meet the contemporary engineering training objectives. This paper takes the measuring experiment of gas diffusion as the object andMeasuring the diffusion coefficient of the vaporized solvent in the crystal of the solid phase adsorbent is an important adsorption parameter, and the experimental teaching is difficult to meet the contemporary engineering training objectives. This paper takes the measuring experiment of gas diffusion as the object and extends it to the design and realization of experimental device for measuring the intra-crystalline diffusion coefficient of vaporized solvent in metal organic framework (MOF) (HKUST-1 type) porous materials. It combines the principle of the gas chromatograph FID detector and the principle of measuring the intra-crystalline diffusion coefficient by the zero length column(ZLC) method , puts forward the experimental design scheme, measurement method and data fitting, and makes MATLAB simulation calculation for the ZLC method. During the operation of the experiment, the experimental system is self-built by students according to the experimental principle, integrating the experimental principle, adsorption material loading, data collection and measurement, data analysis and report writing, which practices the “new engineering” talent training concept and improves the achievement of the “new engineering” talent training objectivesaaa..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 127 (2024)
Design and Implementation of ZPW-2000 Frequency Shift Signal Coding and Detection Instrument
Yaojun KANG, and Jianguo LI
A signal detection experimental equipment using the ZPW-2000 frequency shift signal detection method is designed, which is based on the cycle frequency measurement method. The experimental track circuit frequency shift signal detection apparatus has an field programmable gate array（FPGA） at its core. The side frequencyA signal detection experimental equipment using the ZPW-2000 frequency shift signal detection method is designed, which is based on the cycle frequency measurement method. The experimental track circuit frequency shift signal detection apparatus has an field programmable gate array（FPGA） at its core. The side frequency detection method uses two counters to detect the upper and lower jumping edges of the counting signal, and the counting error is reduced to 0-1 counting signal cycle by choosing the larger value of the two sets of counting values. The side frequency detection error can be controlled within 0.07 Hz under the counting signal of 200 MHz. The detection method uses eight counters to realize the detection of shifted frequency information. In order to achieve the acquisition of low-frequency components in the frequency-shifted signal as well as the detection and calculation of low-frequency frequency, the low-frequency detection employs six asynchronous counters, respectively. The experimental instrument measurement demonstrates that the side frequency and low-frequency detection error can meet the requirements of the railway standard TB/T 3532—2018 in the frequency shifted signal up and down the side frequency error of ±0.15 Hz and low-frequency error of ±0.03 Hz. The experimental instrument can accurately calculate the shifted frequency information, which is based on the FPGA ZPW-2000 frequency shifted signal generator. The experimental equipment breaks the limitations of specialized equipment in teaching and experiment, and help students better understand how track circuits are coded and detected..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 131 (2024)
Research on the Establishment and Function of Annual Usage Reports for Large-scale Instruments and Equipment on College-level Platforms in Universities
Na WANG, Yang WU, Dayong QING, and Mina LUO
The lack of refined management and insufficient open sharing of large-scale instruments and equipment has always been a major problem in the management of equipment universities. To solve the above problems, statistics, classification, analysis, and summary of the college’s analysis-sharing platform network big data arThe lack of refined management and insufficient open sharing of large-scale instruments and equipment has always been a major problem in the management of equipment universities. To solve the above problems, statistics, classification, analysis, and summary of the college’s analysis-sharing platform network big data are carried out, and annual usage reports of college-level instruments and equipment are established. The establishment of an annual report is centered around each device. Through a comprehensive analysis of the equipment’s annual usage status, monthly usage hours, user usage information, maintenance status, talent cultivation, scientific research achievements, etc., loopholes in the instrument equipment’s management process can be identified timely and corrective measures can be developed. This helps the instrument team build precise management processes and strategies, improve the management level, and promote open sharing of instruments..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 138 (2024)
Development of a Comprehensive Experimental Teaching Platform for the γ-ray Detection
Xue QIN, Xin YU, Huanyu HAN, Xiulian CHEN, and Jun LIU
Aiming at the disadvantages of traditional γ-ray detection experimental equipment such as low positioning accuracy, troublesome construction, few experimental projects that can be carried out, and not conducive to experiment repetition and teaching, this paper designs and develops a comprehensive experimental teaching Aiming at the disadvantages of traditional γ-ray detection experimental equipment such as low positioning accuracy, troublesome construction, few experimental projects that can be carried out, and not conducive to experiment repetition and teaching, this paper designs and develops a comprehensive experimental teaching platform for the γ-ray detection and measurement, completes the mechanical design and processing of the platform, and develops a multifunctional digital energy spectrometer for the γ-ray detection. Based on this platform, several cognitive, basic, comprehensive, and exploratory experimental projects on γ-ray detection and application can be completed. Practical teaching results have proved that the platform has good stabilitytt, strong operability, and accurate experimental results, and it is convenient for teachers to teach, which can enable students to better understand and master the properties of γ-rays, the mechanism of γ-rays interacting with substances, and the applications of γ-rays..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 143 (2024)
Design and Development of Intelligent Experimental Platform for Gas Transmission and Distribution Based on School-enterprise Cooperation
Hao ZHOU, Shidong ZHOU, Hongyan MA, Zuying YANG, and Yuming GAO
In view of the needs of talent professional ability training for gas enterprises and teaching reform for gas transmission and distribution course under the background of new engineering, a set of intelligent gas transmission and distribution teaching experimental platform is designed and constructed by industry guidancIn view of the needs of talent professional ability training for gas enterprises and teaching reform for gas transmission and distribution course under the background of new engineering, a set of intelligent gas transmission and distribution teaching experimental platform is designed and constructed by industry guidance and school-enterprise cooperation. In the same time, various types of experiment item are developed for the construction of a multi-level experimental teaching system and the experimental teaching methods are explored. The platform can simulate the gas transmission and distribution network process system and its operating conditions, the gas transmission and distribution network intelligent control system operation, emergency treatment of gas transmission and distribution network accidents and other tasks by various advanced information technologies. The platform has a variety of experimental and engineering training functions, which is conducive to the implementation of integrated teaching of theory and practice, and can train and improve students’ engineering practice ability, intelligent ability and innovation consciousness, and cultivate students’ ability and quality to solve complex engineering problems of gas transmission and distribution..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 149 (2024)
Application of Jiandaoyun in the Management of Scientific Research Reagents and Consumables
Ningning CHAO, Menglin YAO, Zhiqiang LIU, and Li ZHANG
Reimbursement of scientific research reagents and consumables is an indispensable part of scientific research, but due to the special nature of scientific research reagents and consumables, the management mode of the independent selection, on-demand use and real-time reimbursement is often adopted by the subject group Reimbursement of scientific research reagents and consumables is an indispensable part of scientific research, but due to the special nature of scientific research reagents and consumables, the management mode of the independent selection, on-demand use and real-time reimbursement is often adopted by the subject group as a unit. As the basic unit of the scientific research, the project group can lay a good foundation for scientific research and fund management by doing a good job in the management of consumables and reagents and reimbursement of funds at the project level. In the actual work of this group, we rely on the online form system Jiandaoyun to build a whole set of consumables and reagents management system, covering the whole process from purchasing, warehousing, receiving, discharging to reimbursement, realizing the paperless and efficient management of consumables and reagents management, and realizing the tracking of the use of funds in the management of the funds..
Experiment Science and Technology
- Publication Date: Feb. 29, 2024
- Vol. 22, Issue 1, 155 (2024)
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