Results 101 to 110 of about 182,218 (142)

百米级尺寸风机叶片雷电下行先导接闪特性的仿真研究

Dianci bileiqi
针对百米级长度风力发电机叶片雷击接闪特性不明晰、防护设计缺乏依据的问题，本研究建立了大容量风机叶片雷击接闪过程的三维仿真模型，模型计算结果与运行数据吻合。计算获得了6.7MW风机叶片沿长度方向不同位置的雷击暴露空间和年雷击次数的分布特征，结果表明随着雷电流幅值增加，叶尖的引雷能力增强并对叶片内侧存在屏蔽作用，自叶尖往叶根方向年雷击次数迅速衰减。当风机叶片与纵轴线夹角为90°时，叶片内侧遭受雷击的风险最高。与1.5MW机组相比，6.7MW风机叶片内侧年雷击次数增加1.71倍。分析表明，雷电流幅值为5.0 ...
秦明, 文仁强, 邬锦波, 程建, 慎志勇, 吴松熊, 谢思源, 贺恒鑫   +7 more
doaj  

[Meta-analysis of the effects of PDL combined with fractional carbon dioxide laser in the treatment of hypertrophic scars in children]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Wu J, Zhang HM, Liu R, Zhang NX, Cui RT.
europepmc   +1 more source

[Development and validation of an interpretable machine learning model for predicting reguirement of early invasive mechanical ventilation in patients with acute pancreatitis]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Wu X, Sha T, Hu H, Sun M, Wu J, Chen Z.
europepmc   +1 more source

[Legal Risks and Regulatory Pathways for the Application of Health and Medical Big Data]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Yang J, Fang Y, Kuang Y, Zhang W, Hu Y.
europepmc   +1 more source

[Prognostic analysis of anticoagulation therapy in elderly patients with cardioembolic stroke]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Meng Q, Fan M, Guo H, Zhang H, Wang M, Wang S, Peng H, Wang X, Hou T, Qin X, Chen D, Li J, Wu Y, Wu T, Chen H, Hu Y.   +15 more
europepmc   +1 more source

[Occurrence characteristics， neurotoxicity risk， and potential mechanisms of traditional phthalate esters and novel alternatives in indoor dust]. [PDF]

Se Pu
Li W, Gao K, Hua K, Wang L, Wei W, Lu L.
europepmc   +1 more source

[Research progress in artificial intelligence for the diagnosis and management of diseases in preterm infants]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Yuan Y, Tang LH, Guan LR.
europepmc   +1 more source

[Role of HLA genetic variants in autoimmune diseases]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Rao T, Chen L, Wei Q, Ouyang D.
europepmc   +1 more source

[Research progress on tracker fixation strategies and related complications in robot-assisted total knee arthroplasty]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Wang J, Wang H, Li D, Cheng Q, Guo H.
europepmc   +1 more source

[From Theory to Governance: The Disciplinary Construction of Chinese Medical Ethics and the Legalization of Ethical Governance]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Liang H, Wang L.
europepmc   +1 more source