Gaoya dianqi与交流配电系统一样，表征直流配电系统特征指标的直流电压、直流电流也在时刻变化着且其变化幅度、变化频度均具有很强的随机性，导致接入电网的照明类负载灯光照度的随机变化，引起感受体—人对照度变化的视感即常说的闪变。相比于交流配电系统已有公认的、标准化的闪变测量方法，直流配电系统的闪变测量方法目前还处于研究探讨之中。文中基于直流配电系统的特点，在分析传统交流配电系统平方解调闪变测量方法的基础上提出了一种适用于直流配电系统的去平方解调闪变测量方法；仿真分析表明：该方法准确度高 ...
苏灿 +5 more
doaj
[Determination of ethylene oxide and acetaldehyde in petrochemical exhaust based on thermal desorption- gas chromatography-mass spectrometry]. [PDF]
Se PuLi YJ.
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[Effect of trapezoidal and modified triangular flaps on mucosal blood supply and osteogenesis after guided bone regeneration]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiChen S, Zhang X, Jia X, Xia R, Jiang F.
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Dianci bileiqi直流接地极接地特性的准确计算和定量分析是直流接地极优化设计的基础工作，也是保障直流输电系统正常及故障工况下安全稳定运行的重要基础。本研究基于直流接地极散流物理过程的分析，采用电磁场基本理论，建立了直流接地极接地性能有限元数值计算模型；其中，直流接地极截面尺寸与接地极长度及散流空间尺寸相差104数量级以上，为解决巨大的尺寸差异带来的计算奇异及过大的计算量问题，模型中采用具有虚拟厚度的二维薄壳代替三维接地导体，并对无穷散流空间引入空间坐标变换。在此模型基础上，计算单根垂直性直流接地极散流电场 ...
李景丽 +3 more
doaj
[Structural design and mechanical analysis of a "drum-shaped" balloon-expandable valve stent in expanded configuration]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiZhao Y +5 more
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[Causal relationship between gut microbiota and T cell subsets in the development of colorectal cancer: a Mendelian randomization analysis]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoYu Z +8 more
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[Clinical efficacy of two-stage ear reconstruction using autologous rib cartilage in the correction of congenital microtia]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za ZhiXu ZC +6 more
europepmc +1 more source
["Chongqing experiences" in treatment of bone infections]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiXie Z.
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[Efficacy and safety of super electroconvulsive therapy for treatment-resistant depression: a retrospective analysis of 292 cases]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoAn J, Chi Z, Zhao C, Li Y, Wang R, Hu Y.
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