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The corrosion fatigue crack growth and near-threshold characteristcsof high tensile steel HT60 were investigated by using the compact specimens underexposure to synthetic sea water. The da/dN vs △K_ relation in air may be conser-vetivel estimated for that in sea water. In the high △K region with high stressratio, owing to the acceleration of crack growth promoted by stress-induced dissol-ution, the crack opening stress intensity factor K_ represents only the result ofcrack surface in contact with corrosion products, so as to give an overestimation ofK_ at crack tip.

對高拉力鋼HT60的腐蝕疲勞裂紋擴展特性和門檻值區(qū)域特性，采用緊湊拉伸試件在人工海水中進行了實驗和研究黄色视频在线网站2，結果表明：在空氣中的da/dN與ΔK_關系可以作為在海水中的da/dN與ΔK關系的一個偏保守的預測；在高應力比的高ΔK區(qū)域国产一级A视频，由于應力誘起溶解促進了裂紋擴展的加速https://igao16com；該裂紋開口應力強度因子K_僅反映了裂紋表面同腐蝕生成物接觸的結果，從而導致了K_在裂紋尖端的偏大的估計結果好色妞xxxx在线。

In contrast, assembly of mobile hard disk, although the manufacturer can also install high-speed hard disk to your hard disk box, but due to the lack of synchronization control chip technology and can not interface with the hard drive to eliminate the bottleneck between the speed, so that assembly of a "high-speed mobile hard disk" can not truly reflect the advantages of high-speed hard drive, it is very easy because the interface with the speed difference between the hard disk, and there waiting for data transmission, data underrun issues.

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Results The mean sensitivity of the eyes simply with high myopia was (18.39±4.86),similar as the high myopia eyes undetached with the other eye detached (20.28±5.85),and lower than the normal eyes (26.75±4.43),compared with the high myopia eyes o...

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The status quo of high-resolution data acquisition system is discussed and by studying the character of high-resolution seismic exploration and seismic signal, the theoretical models and character of each unit are gained. This paper point out that under 1000 meter's depth where petroleum is embedded the IDR of central controlled seismic instrument and telemetricseismic instrument are lower than 70dB which can't meet the needs of high-resolution seismic exploration.

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Based on the experience and methods summed up by other researchers, the technique of cell culture was employed to study bovine follicular oocytes maturation, fertilization and the development of earlier embryo in vitro. The objective of this research is to upbuild and perfect a set of high-and-new-tech systems to obtain high-yield and high-quality bovine embryo, to provide technical operational regulations and ways and means to embryo engineering in practical production, to accumulate data for theoretical research.

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To realize high-speed real-time processing for high-definition and low-distortion endoscopic image, this thesis introduces the FPGA design of video buffer controller for high definition electronic endoscope.

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