Results 61 to 70 of about 3,086 (113)

有限元分析法在变电站接地电阻短距测量方法中的应用

Gaoya dianqi, 2010
运用有限元计算软件ANSYS对变电站接地电阻的短距测量方法进行了研究。借助于ANSYS中的电流场分析模块,对引入电流极前后接地网的地表电位分布进行了计算分析,并根据补偿法原理计算得出电压极的测量位置。依据该计算分析结果,对接地网的接地电阻进行了实际测量。实验结果与计算结果吻合良好,验证了有限元分析在接地电阻短距测量法中应用的有效性。在此基础上,再次利用ANSYS对分层土壤的情况进行了研究分析,体现了有限元分析方法的灵活性与实用性。
王怡华, 王丰华, 金之俭, 吴剑敏   +3 more
doaj  

VCSEL耦合方式对LDD调制端电压余量影响的研究

Guangtongxin yanjiu, 2012
在SFP（小型可插拔）光模块中,LDD（激光器驱动器）是一个非常关键的部分,LDD调制端的电压余量是否足够关系到光模块能否正常工作及工作指标是否满足要求。文章分别讨论了VCSEL（垂直腔表面发射激光器）与LDD的直流和交流耦合对LDD调制端电压余量的影响。实验结果表明,采用交流耦合的接口方式可以有效地避免LDD调制端电压余量不足的情况出现,研究结果对使用VCSEL的SFP光模块的设计具有参考价值。
郝文康, 任海兰
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考虑土壤非线性的输电线路暂态过电压特性研究

Dianci bileiqi
土壤非线性效应将导致接地装置接地电阻具有时变特性，进而显著影响输电杆塔的电位分布，因此准确研究考虑土壤非线性效应的输电走廊雷击暂态过电压特性具有重要意义。本研究建立了一种考虑土壤非线性特性的典型220 kV输电线路暂态过电压模型。首先融合接地导体有损长线模型与EMTP，构建考虑土壤非线性特性的接地装置时变电路模型；其次通过现场试验，进行接地装置时变电路模型验证；融入绝缘子串、输电线路模块、同塔双回输电杆塔，联合构建考虑土壤非线性特性的典型220 kV输电线路暂态过电压模型；最后 ...
康吉义, 曾中伟
doaj  

[MS-DTNet: an efficient model combining multi-scale convolution and dual-tower attention for detecting abnormal heart sounds]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Wen Y, Lu X, Wu Q, Chen H, Chen C.
europepmc   +1 more source

[Association between umbilical cord blood proteome and early infant neurodevelopmental risk]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Mo J, Wang H, Liu J, Li Q, Su T, Ji Y.
europepmc   +1 more source

[Electric-field modeling, simulation, and experimental analysis of multi-target temporal interference transcranial alternating current stimulation]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Wang T, Cui C, Wei Y, Ji X, Xu G.
europepmc   +1 more source

[Prediction and <i>in vitro</i> validation of potential indications for ginkgolide B based on network pharmacology strategies]. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban
Zhang H, Fan Q, Zhang Y, Liu M, Cui G.
europepmc   +1 more source

[A bidirectional feature mapping classification model based on multi-constrained latent representation learning for differential diagnosis of pneumonia]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Zeng M, Zhuo L, Tan S, Zhen X.
europepmc   +1 more source

[Evaluation of an interpretable 12-lead ECG automatic diagnosis model based on deep feature fusion]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Lu X, Chen H, Wu Q, Wen Y, Liu G, Chen C.   +5 more
europepmc   +1 more source

[A vessel-enhanced consistency-preserving diffusion model for 3T-to-7T susceptibility weighted image generation]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Wang T, Duan C, Lou X, Feng Q.
europepmc   +1 more source