[1] MAO B F. The Design and Optimization of Microscope Autofocus System ［D］. Zhejiang: Zhejiang University, 2006. ( in Chinese)

[2] DANIEL R, RAMCHARAN J, ROGAKOU E, et al.. Histone H2AX is phosphorylated at sites of retroviral DNA integration, but is dispensable for post-integration repair ［J］. J. Biol. Chem., 2004, 279(44) : 45810-45814.

[3] ROTHKAMM K，LOBRICH M. Evidence for a lack of DNA double-stand break repair in human cells exposed to very low X-ray doses［J］. Proc. Natl. Acad., 2003,100(9):5057-5062.

[4] YU Y K, LU Y, YU Y N, et al.. γH2AX: a biomarker for DNA double-standed breaks ［J］.Chin. J. Pharmacol Toxicol, 2005,19(3) :237-240.

[5] DIAO H L,ZHOU CH X,YU Y K, et al.. 2-Acetylaminofluorene induces γH2AX foci formation in CHL cells［J］. Chin. J. Pharmacol Toxicol, 2006,2:131-137. ( in Chinese)

[6] KIM S, JUN D H, KIM H J, et al.. Development of a high-content screening method for chemicals modulating DNA damage response ［J］. Journal of Biomolecular Screening, 2011,16(2):259-265.

[7] YIN P. Autofocusing in Low Signal-Noise-Ratio Environment ［D］. Jinan:Shandong University, 2009. ( in Chinese)

[8] DUAN R L, DUAN X B, LI Q X, et al.. Micro-assembly auto-focusing system based on image processing ［J］. Opt. Precision Eng.,2006,14(3):468-472. ( in Chinese)

[9] ZHANG W J, YANG Y L, LI D, et al.. Key algorithms of automatic image measurement system ［J］. Opt. Precision Eng.,2007,15(2):294-301. ( in Chinese)

[10] CHEN L G, WANG M Y, YANG ZH L, et al.. Fast autofocus method for microscopic computer vision ［J］. Opt. Precision Eng.,2010,18(6):1361-1366. ( in Chinese)

[11] WANG W Y, LIU X L, XIE H, et al.. A wavelet-based focus measure and 3-D autofocusing for microscope images ［J］. Opt. Precision Eng.,2006,14(6):1063-1069. ( in Chinese)