Results 61 to 70 of about 1,058 (99)

[Application and research progress of mandibular distraction osteogenesis in craniofacial microsomia]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Li L, Zhang Z.
europepmc   +1 more source

基于CDEGS的土壤冻结状态下接地网安全性能研究

Dianci bileiqi
变电站的接地网的主要作用是为故障电流提供流散的通道，完好的接地网是保证电力系统正常运行以及变电站中的设备和工作人员安全性的重要保证。本研究通过国际知名的电力系统接地分析软件CDEGS来对存在季节性冻土的某110 kV变电站的接地网的安全参数进行研究，分析了土壤冻结状态下的接地网的接地电阻、地电位升高及分流系数等安全性能参数的变化规律，旨在实现对存在季节性冻土变电站接地网安全和优化措施的进行多指标的评价与分析。研究结果表明，当冰冻层增大至接地网埋深以下时，地网的接地电阻、分流系数及接触、跨步电压会逐渐增大，
张文龙, 李承阳, 张玉东, 吴金玲, 孟垂懿, 原欣, 黄硕   +6 more
doaj  

[Network analysis of insomnia, anxiety, depression, and non-suicidal self-injury in adolescents]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Xi C, Zeng C, Zhang A, Zeng Y, Zeng C.
europepmc   +1 more source

基于CDEGS土壤冻结状态下接地网安全性能研究

Dianci bileiqi
变电站的接地网的主要作用是为故障电流提供流散的通道，完好的接地网是保证电力系统正常运行以及变电站中的设备和工作人员安全性的重要保证。本研究通过国际知名的电力系统接地分析软件CDEGS来对存在季节性冻土的某1 10kV变电站的接地网的安全参数进行研究，分析了土壤冻结状态下接地网的接地电阻、地电位升高及分流系数等安全性能参数的变化规律，旨在实现对存在季节性冻土变电站接地网安全和优化措施的进行多指标的评价与分析。研究结果表明，当冰冻层增大至接地网埋深以下时，地网的接地电阻、分流系数及接触、跨步电压会逐渐增大 ...
张文龙, 李承阳, 张玉东, 吴金玲, 孟垂懿, 原欣, 黄硕   +6 more
doaj  

[Epidemiological characteristics of respiratory syncytial virus infection in children in Hebei Province]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Wang X, Lu SK, Liu JH, Shuai JF, Huang KL, Niu B, Cao LJ, Cui XW.   +7 more
europepmc   +1 more source

[Advances in the application of digital cognitive behavioral therapy in adolescent mental health issue interventions]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Sang X, Hou X, Long N, Mao P.
europepmc   +1 more source

[Mediation analysis of plasma phosphorylated tau217 in the association between periodontitis and mild cognitive impairment]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Zhang Y, Wei M, Zhao X, Qi X, Zuo S, Mao S, Wang J, Ding G.   +7 more
europepmc   +1 more source

[Analysis of four brominated flame retardants in mineral water and instant-noodle-bowl samples by magnetic solid-phase extraction coupled with liquid chromatography using magnetic carbon aerogel as adsorbent]. [PDF]

Se Pu
Nie QR, Ni M, Xu JY, Shi Y, Jiang HM.
europepmc   +1 more source

[Application and advances of exosome-hydrogel system in wound healing]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Qiu Y, Tan Q.
europepmc   +1 more source

[Preoperative serum magnesium as a biomarker for predicting delirium following non-cardiac surgery in elderly patients: a retrospective cohort study]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Yuan M, Ruan X, Li Y, Zhang T, Hao C, Li H, Lou J, Cao J, Liu Y, Mi W, Zhang X.   +10 more
europepmc   +1 more source