Results 111 to 120 of about 2,809,895 (158)

[Theoretical system of brain-computer interface for basic research]. [PDF]

open access: yesSheng Wu Yi Xue Gong Cheng Xue Za Zhi
Fu Y   +7 more
europepmc   +1 more source

[Activation of the CaMKKβ/AMPK/HIF-1α signaling pathway promotes angiogenesis in endometriosis by regulating mitophagy]. [PDF]

open access: yesNan Fang Yi Ke Da Xue Xue Bao
Chen Y   +10 more
europepmc   +1 more source

[Research advances in the mechanisms of neuroinflammatory in substance addiction]. [PDF]

open access: yesZhejiang Da Xue Xue Bao Yi Xue Ban
Zhou J, Zou Z, Pan T, Liu Y.
europepmc   +1 more source

Square stator current demodulation analysis diagnosis method for broken rotor bar fault of squirrel cage motor

open access: yes, 2015
受基频频谱泄露影响,经典MCSA方法诊断鼠笼电机转子断条故障时的诊断能力严重依赖于电机负载大小。针对这一问题,提出了基于定子电流信号平方解调制分析诊断方法。首先采用硬件方式对定子电流信号作基于平方解调制的信号预处理,以此消除制约诊断能力的基频频谱泄露,继而对解调后的信号作快速傅里叶变换,然后根据频谱中是否存在特征频率成分判断转子断条故障发生与否。在3 k W电机实验平台上对所提出的方法进行实验验证。实验结果表明,即使鼠笼电机在轻载或空载条件下运行时所提出的方法仍然能够诊断出转子断条故障 ...
贾朱植   +3 more
core  

Acoustic signals, communication and their roles in reproductive ecology of Chinese alligator (Alligator sinensis)

open access: yes, 2009
声信号是动物界非常重要的一种通讯方式,本研究采用野外观察、声谱分析和录音回放等方法,首次对扬子鳄的声信号和声通讯及其在繁殖生态中的功能做了较为系统的研究。主要结果和结论有: 1)扬子鳄具有非常复杂的声通讯系统,既有适合长距离通讯的声信号(Long-distance signal),又有适合个体间近距离通讯的声信号(Short-distance signals)。声谱分析发现,扬子鳄各类声信号的主频率都很低,低于500Hz。这可能是他们对植被茂密的栖息地环境长期进化适应的结果。 2 ...
王先艳
core  

Home - About - Disclaimer - Privacy