Results 101 to 110 of about 501,561 (146)

质子交换膜燃料电池模型研究进展

, 2002
综述了质子交换膜燃料电池（PEMFC）数学模型的研究进展，分析PEMFC中膜、催化层、扩散层和流场区域的传递现象和水、热管理的重要性，讨论了模型的维数、复杂性和求解方法 ...
衣宝廉, 葛善海, 张华民
core  

[Analysis the influencing factors and risk warning of the therapeutic efficacy of multi plane low temperature plasma radiofrequency ablation for OSAHS]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Liu X, Dong K, Liu M, Li H, Ning B.
europepmc   +1 more source

[Mid-term effectiveness of hip preservation in the reconstruction of ultrashort bone segments in the proximal femur with three-dimensional printed customized cementless intercalary endoprosthesis with an intra-neck curved stem]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi, 2023
Sheng H, Zhang Y, You Q, Gong T, Li Z, He X, Tang F, Zhou Y, Wang Y, Lu M, Luo Y, Min L, Tu C.   +12 more
europepmc   +1 more source

[Comparison of the efficacy of sigmoid sinus constriction plus cartilage reconstruction and sigmoid sinus return surgery in sigmoid sinus-related pulsatile tinnitus]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Cao W, Wu Z, Zhao Y, Tong B, Yao K.
europepmc   +1 more source

电子附着效应对SF_6断路器灭弧的影响

, 1983
本文讨论了SF6气吹断路器中的电弧熄灭问题 ...
林烈
core  

横向磁场中动态电弧的近似计算

Gaoya dianqi, 1987
本文在假定电弧截面温度分布的基础上,通过对电弧内部能量平衡的研究,提出了一个横向磁场中动态电弧的近似计算模型。本文简略介绍了这一近似计算模型的推导过程和参数选择,并对横向磁场中的0.1MPa空气里的电弧进行了数值计算,计算的结果与实验结果较为接近。
doaj  

[Effectiveness comparison of anterior cervical discectomy and fusion with zero-profile three-dimensional-printed interbody fusion Cage and titanium plate fusion Cage]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Li Y, Li X, Li B, Gu Y, Yang T, Zhao L, Cui W, Gu S, Wang H.   +8 more
europepmc   +1 more source

[Microbial communities in extraradicular infections of post-treatment apical periodontitis without or with sinus tracts]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Tang R, Yang L, Nie J, Wang X.
europepmc   +1 more source

基于Sobol’法的VFTO对电弧阻抗参数的灵敏度分析

Dianci bileiqi
构建精确的隔离开关电弧阻抗模型是提升VFTO仿真准确度的核心环节。然而，在击穿过程中间隙气压、温度等因素的动态变化会导致电弧模型阻抗参数具有不确定性。因此，深入研究不确定性参数对VFTO的影响具有重要意义。本研究基于电磁暂态程序ATP-EMTP构建隔离开关分段电弧模型，分析了电弧阻抗参数变化对VFTO峰值、陡度及上升时间等特征参数的影响，并采用Sobol’全局灵敏度分析法量化了VFTO特征参数对各参数的灵敏度。计算结果表明：稳态电弧电阻和击穿延时对VFTO的峰值、陡度及上升时间有显著影响 ...
刘青, 罗浩, 李奥龙, 李志杰, 仇志伟   +4 more
doaj  

[Medium- and long-term clinical efficacy of tibial transverse transport surgery in the treatment of diabetic foot ulcers]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Liu SW, Jia ZW, Zhang ZH, Guo Z, Zhang XX, Luo Q.   +5 more
europepmc   +1 more source