Results 41 to 50 of about 8,484 (166)
Development and prospect of freezing shaft lining technology for vertical mine shafts in China [PDF]
This paper delves into the formidable challenges posed by the trends of “deepening” and “scaling up” in the design, construction, and operation of deep mine shafts in China.
Chi ZHANG +10 more
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, 2019 以盾构法整个掘进过程为对象,根据盾构法施工阶段的工艺步骤,结合以往经验及研究成果,运用盾构法施工风险识别的三维程式方法确定风险识别的范围和对象。通过WBS工作分解结构树和RBS风险分解结构树耦合,梳理盾构法施工基本工序单元与风险因素的对应关系,构建盾构法施工风险因素识别WBS-RBS结构矩阵,并据此建立过海通道盾构法施工风险因素矩阵,识别出过海通道盾构法施工关键风险因素。以期对过海通道盾构法项目施工风险管理提供理论依据和风险识别工具,为其他类似工程施工风险识别提供参考。中铁建投2016年科技重大计划 ...
周红, 李顺平, 舒婷
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World Medical &Health Policy, Volume 18, Issue 1, March 2026.ABSTRACT This systematic review examines the digital health interventions for inclusive and equitable solutions for transforming healthcare access and delivery in Nepal. The research focuses on improving digital health accessibility among marginalized and rural populations of Nepal.
Manoj Kumar Dahal, Gary L. Kreps
wiley +1 more source
Design and implementation of Construction Site Management and Monitoring System for Haikou City [PDF]
, 2016 在建筑工程施工现场，人员、材料、机械等要素共同存在。对于一些施工技术复杂，材料堆放分散的施工场地，需要对现场环境数据和机械设备参数进行定时采集。从而能够较精准的了解作业现场的实时动态，保证工程施工进度正常，工艺流程安全可靠。在以往的技术经验中，传统的监控系统不能实现多点联动监控，在数据传送方面也不够及时，可靠度亟待加强。而本文所研究的基于3G的建筑工程远程监控系统可以在上述问题的解决中，将系统与目前发展较为先进成熟的3G网络与监控技术结合起来，成功地把施工现场监控数据高效、可靠、实时地传送至监控中心 ...
严玉莉
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Porous NiTi alloys are widely used in biomedical and engineering fields. Using the PBF‐LB technique, the TPMS and Voronoi porous parts with a porosity of ∼67% and a minimum feature size of 0.15 ± 0.02 mm were fabricated. Although the bulk sample fabricated with the same parameters is defect‐free, μ‐CT reconstruction on the porous sample ...
Wen‐Hao Zeng +7 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2022 某铁路站房屋盖钢结构为双曲悬挑双向交叉浪花状空间管桁架形式，安装精度要求高，节点错综复杂，施工难度大。对该结构施工过程中遇到的重、难点进行了介绍，详细分析了浪花状屋盖钢结构的施工关键技术，针对浪花状屋盖独特的造型特点及施工条件，提出了“整体卧式拼装，双机空中转体”的施工技术，并利用有限元动态仿真模拟技术分析了浪尖结构高空转体过程中的变形和受力情况，结合仿真分析数据对双机抬吊过程进行关键点位的监测，在确保施工安全和质量满足规范要求的前提下，实现了屋盖钢结构的高效率、高精度建造 ...
崔嘉慧 +5 more
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, 2016 跨海大桥是最需要考虑节约资源和进行环境保护的桥梁。而大跨度公铁两用斜拉桥是目前占用跨海通道资源最少的大桥,也是跨海大桥设计的首选桥型。在广泛调研跨海大桥和收集文献资料的基础上,对我国近年来修建的跨海大桥进行了梳理统计,发现我国已经建设的公路跨海大桥大部分的主航道桥是斜拉桥。对部分国内外大跨度公铁两用斜拉桥的结构设计关键技术进行了论述;结合大跨度公铁两用斜拉桥的结构特点,对适用于大跨度公铁两用斜拉桥的结构体系和桥面布置进行了对比分析;提出了影响公铁两用斜拉桥跨度增大的问题与对策 ...
雷俊卿 +1 more
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Current situation and development trend of mechanized shaft driving in frozen shaft [PDF]
In view of the energy occurrence structure of “rich coal, poor oil and little gas” in China, and the situation that coal will occupy the dominant position of energy consumption for a long time,The development history of frozen shaft mechanized drilling ...
Hang DING +6 more
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Mitigating light pollution impacts on arthropods based on light‐emitting diode properties
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Light pollution from artificial light at night (ALAN) is a significant environmental problem with far‐reaching consequences for ecological systems. Recent innovations in light‐emitting diode (LED) technology may offer sustainable outdoor lighting solutions, but scientific evidence is lacking. We investigated the effects of various LED lighting
Nicola van Koppenhagen +3 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2019 某钢结构工业厂房屋盖采用焊接球节点正放四角锥钢网架结构形式,结构面积大,杆件数量多,现场焊接作业量大。施工中开发和应用了组合单元吊装及液压同步提升安装的混合施工技术。对施工全过程进行了仿真模拟分析,验证了该安装技术的可行性,为网架的顺利施工提供了理论依据。该施工技术可大幅减少现场高空焊接作业量,有效缩短工期,保证施工质量,可应用于类似钢结构网架的安装。
韩向科, 王伟, 苏波, 马哲
doaj