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定向钻井技术新进展及发展趋势

Shiyou jixie, 2015
为高效开发海洋和非常规油气资源，国外在定向钻井技术领域发展了一系列配套技术。介绍了国外定向钻井技术的现状与最新进展，分析并总结了定向钻井技术未来的发展趋势。研究表明，通过提高MWD/LWD性能和有缆钻杆等技术来实时获取井下数据是实现定向钻井可视化和预测井下作业环境的基础；通过提高井眼质量和井下工具的可靠性，使“一趟钻”完成1个钻井开次成为可能；将破岩工具与BHA一体化设计，以及井下工具与钻机配套系统的一体化设计将大大提高钻井作业效率；定向钻井新模式进一步发挥了定向钻井的优势，降低了综合作业成本 ...
王敏生, 光新军
doaj  

基于风速—风向联合分布的UHVDC线路合成场及评估技术研究

Gaoya dianqi
特高压直流输电线路形成的离子流在风力作用下迁移，由于风具有地域性与随机性，造成离子流密度ρj与合成场强E的量化评估困难。目前计及风力的E值统计评估未考虑到风速与风向随机性的关联，且缺少对多风向下离子流迁移的模拟。为此，文中以湖州±800 kV线路为例，将传统二维线路合成场有限元模型拓展到三维，得到—影响下ρj与E的变化规律，并以Copula函数构建概率模型，提出一种安全评估技术。结果表明：风速决定了空间电荷扩散程度，风向决定其扩散轨迹；风速增大使ρj与E先增大后减小；风向与线路走向夹角减小使风力影响减弱；
秦子翌, 陈炯, 任茂鑫, 尹凡, 方圆圻   +4 more
doaj  

[Closed-loop regulation system for paralyzed lower limb joint movement based on electrical stimulation of spinal central pattern generator]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Shen X, Zhang X, Lou X, Gu H, Bian X, Zhong H, Zhao Y.   +6 more
europepmc   +1 more source

[Adaptive repetitive control of wrist tremor suppression based on functional electrical stimulation]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2023
Zhang Z, Liu Y, Chu B, Huo B, Owens DH.
europepmc   +1 more source

[Trajectory planning and tracking control for upper limb traction rehabilitation training]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Luo S, Li X, Lu Q, Chen P, Li K.
europepmc   +1 more source

[Progress of scRNA-seq technology in nasopharyngeal carcinoma research]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Zheng B, Jin G.
europepmc   +1 more source

[Neuroprotective effects of idebenone combined with borneol via the dopamine signaling pathway in a transgenic zebrafish model of Parkinson's disease]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Wang Q, Zhong Y, Yang Y, Liu K, Liu L, Zhang Y.   +5 more
europepmc   +1 more source

[Assessment of upper limb rehabilitation exercise participation based on trajectory errors and surface electromyography signals]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Wang X, Lyu J, Fang S.
europepmc   +1 more source

[A risk prediction model for prognosis and immunotherapy response in prostate cancer patients based on immunosuppressive neutrophil Neu_2 subsets]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Chen Z, Zhou J, Tan L, Huang Z, Xue K, Chen M.   +5 more
europepmc   +1 more source

[Digital full-mouth fixed occlusal reconstruction (partⅠ): the "5-19N" clinical technical solution for dentulous situation]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Yu H, Wu J, Shui Y, Yan Z, Pei Y.
europepmc   +1 more source