, 2007 本文提出了一种电源波动影响弱、低温飘、微功耗（〈1μw）的CMOS电压型积分器电路。它利用自偏置的恒流源电路结构以及MOSFETs的亚阈值特性产生一个nA级的恒流源，通过控制电路实现对电容充放电来获得积分电压。并且对电路结构、器件类型和器件尺寸进行了优化。仿真结果表明，得到了独立于电源电压、低温度系数 ...
吴杰, 石寅
core
[The application of nanoparticles in the treatment and prevention of pathological scars]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiHuang Y, Zhao L, Jin Z, Cui A.
europepmc +1 more source
, 2008 研究了在空气、油膜和绝缘树脂薄膜这三种放电介质中的伏安特性,得出了在同一介质中,通道电极间电压不随其它初始条件改变而变化,只与放电介质对通道箍缩能力成正比,在本实验中薄膜的通道电压最高80.4V,空气中最低26.0V。通道中电流波形与放电介质有关,同样的高低压组合、相同放电脉宽下在空气和油膜中为矩形波,而在薄膜中为三角波,峰值电流变化不大。电流波形不随脉宽的改变而变化,当增大初始高压端或低压端输入时,电流随之增加 ...
杨明江, 占剑
core
[Progress and future prospects of robot-assisted total hip arthroplasty]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiCai L, Gui Y, Kong X, Chai W.
europepmc +1 more source
[Current status and prospects of minimally invasive surgical treatment for anterior disc displacement without reduction in temporomandibular joint]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiRen R, Cao P, Jiang N.
europepmc +1 more source
[Research progress on the acquisition technology of magnetocardiography]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiKang B +5 more
europepmc +1 more source
[Ultrasound-synergized targeted nanoparticles suppress proliferation, migration and invasion of hypoxic lung cancer cells <i>in vitro</i>]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoDong J, Guo J, Li D, DU Y.
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Gaoya dianqi为准确评估乙丙橡胶（EPDM）车载电缆的绝缘老化状态，引用了等温松弛电流（IRC）法和局部放电（PD）法，分别讨论了老化因子、局部放电特征信息与电缆老化状态之间的映射关系，结果表明：随着车载电缆运行里程的增加，老化因子、局部放电量、放电次数和放电电流均呈现规律性增长趋势，多种老化应力协同作用是造成车载电缆绝缘劣化的主要原因，绝缘材料内部陷阱的增多和加深是车载电缆老化的微观表现。协同等温松弛电流法和局部放电法对车载电缆绝缘状态的评估具有有效性和可行性，通过建立微观陷阱分布特性与宏观局部放电特性之间的联系 ...
宋微 +5 more
doaj
[Combined assessment of gastric mucosal damage associated with <i>Helicobacter pylori</i> infection in children by virulence factors and pepsinogen]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiHuang CL, Lin Q.
europepmc +1 more source
[Electroacupuncture at Baihui and Zusanli improves fear memory extinction in single prolonged stress mice by activating hippocampal astrocytes]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoChen X +7 more
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