Results 71 to 80 of about 14,739 (118)

[Status and influencing factors of transition preparation in adolescents with thalassemia major]. [PDF]

open access: yesZhongguo Dang Dai Er Ke Za Zhi
Huang XP   +5 more
europepmc   +1 more source

面向环保接地施工的杆塔分支式外延接地网接地特性研究

open access: yesGaoya dianqi
低碳环保已成为国家的战略和政策导向,输电杆塔在降阻施工时,常采用敷设长距离外延接地极方式接地,造成资源浪费、环境破坏等问题。针对杆塔接地施工环境的复杂性与施工面积的有限性,文中提出输电线路杆塔分支式外延接地网散流降阻结构,实现了接地降阻施工的低碳环保。首先,仿真计算单根外延接地极的有效降阻长度;然后,研究了土壤电阻率、入地电流频率对单分支式和多分支式外延接地网降阻特性的影响规律;最后,分析了不平衡分支式外延接地网的散流特性。结果表明:相比于传统方框带射线型接地网,分支接地极结构比例为1 ...
廖玉琴   +5 more
doaj  

[Guidelines for the diagnosis and management of first relapsed multiple myeloma in China (2026)]. [PDF]

open access: yesZhonghua Xue Ye Xue Za Zhi
Plasma Cell Disease Group   +3 more
europepmc   +1 more source

[Policy logic and multiple challenges of meal assistance services for older adults under the goal of healthy aging]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban
Pan W   +7 more
europepmc   +1 more source

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