Results 41 to 50 of about 14,028 (168)
Feedback mechanism of front abutment stress on filling rate of backfilling body in coal burst mine [PDF]
High stress is the main reason for high frequency of rock burst in deep coal mines. Backfilling mining serves as an effective method to control roof strata movement, alleviate the degree of stress concentration, and reduce the failure of surrounding rock
Chuanping WU +10 more
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Conservation Biology, Volume 40, Issue 2, April 2026.Abstract There exists a growing suite of technologies that support significant and exciting progress in biodiversity conservation and research. Citizen scientist participation is common in this research and often focuses on data collection and labeling.
Joycelyn Longdon +5 more
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Growing Demand and Uneven Supply: Eight Years of Nature Education in China 需求增长与供给不均:中国自然教育八年发展回顾
Integrative Conservation, Volume 5, Issue 1, Page 46-58, March 2026.ABSTRACT This study examines the role of nature education in advancing conservation and sustainability in China between 2014 and 2023. Drawing on national survey reports and historical–comparative methods, it analyses the dynamics of public demand, institutional supply, and practitioner capacity.
Qi Yunxi, Lyu Xiang, Huang Yu
wiley +1 more source
Guangtongxin yanjiu, 2007 在数据库集群系统中,进程迁移常用于实现系统的负载均衡、高效容错和减少通信开销等方面。文章提出的基于自适应通信平台（Adaptive Communication Environment,ACE）实现进程迁移技术的方法,在用户层实现内核级的进程迁移功能,解决了数据库集群系统进程迁移跨平台的问题,提高了集群系统的数据处理和系统容错能力。
肖建桥, 卢军
doaj
Study on pressure relief range of overlying strata and accurate gas extraction of adjacent strata in superimposed mining of coal seam [PDF]
Aiming at the mining problem of No.9 coal seam with strong outburst danger in Xinyuan Coal Mine, we proposed that to mine No.3 coal seam as the upper protective layer first, by analyzing the failure mechanism of roof and floor after coal seam mining, the
Haidong WANG +5 more
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Integrative Conservation, Volume 5, Issue 1, Page 137-149, March 2026.Pometia pinnata demonstrated life‐stage‐specific genetic responses to landscape features, with asymmetric gene flow patterns and population recovery following historical bottlenecks, revealing complex topographic and demographic influences on forest genetic structure.
Madhuparna Chatterjee +5 more
wiley +1 more source
Jixie chuandong, 1992 抛弃把轮齿形状视为悬臂梁的假设和引入应力集中系数的方法,直接从实际齿形和相似理论出发,建立齿根最大拉应力计算公式:σFO=Ft/（b·mn）·YFR。通过采用边界元法计算出样本空间中各种齿数z,各种径向变位系数xn及各种载荷作用高度ef下的真实齿形系数YFR。采用三元回归分析得出YFR的回归公式。设计者即可方便地计算任意z、xn、ef下的齿根最大拉应力σFO。其中单齿对接触区外侧点的ef值可由端面重合度εa算出。新方法克服了ISO6336方法中的许多缺陷,具有更为先进准确和方便的突出优点 ...
冯守卫 +3 more
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He jishu铅基快堆作为极具发展潜力的第4代核能系统，具有良好的非能动安全性和经济性，但在紧急停堆后上腔室内容易产生热分层现象，严重威胁反应堆运行安全。目前，铅基快堆热分层相关数据长期分散于各类文献中，且存在数据格式不统一、工况溯源性差等问题，严重限制了数值模拟与数据驱动方法的发展。本研究针对上述问题，系统检索了2004~2026年国内外公开发表的相关文献，经过严格筛选，共收集了32篇核心文献中的实验数据和数值模拟数据。数据集覆盖中国、俄罗斯、韩国和欧洲等不同国家和地区研发的典型反应堆和实验装置，涵盖稳态运行 ...
薛 可盈 +9 more
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Gaoya dianqi, 2021 电力设备绝缘裂化常常伴随着局部放电,如何提高电力变压器局部放电的检测精度对于研究其绝缘状态具有重要意义。集合经验模态分解法(ensemble empirical mode decomposition,EEMD)在局部放电的去噪过程中得到良好的应用,然而对于如何准确的选取EEMD分解过程中的固有模式函数(intrinsic modefunctions,IMFs),还原局部放电真实信号是关键。针对这一问题,文中提出一种基于相关系数的EEMD电力变压器局部放电去噪方法。该方法基于两路同时采集的局部放电信号 ...
彭炜文 +5 more
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Fatigue Reliability Analysis of Multi-loading Suspension Bridges Considering Nonlinear Accumulative Damage [PDF]
, 2014 针对大跨多荷载桥梁疲劳损伤累积非线性过程中的大量不确定性,对火车、汽车与风荷载作用下的大跨悬索桥,利用连续损伤模型提出了一个疲劳可靠度评估方法.首先,在连续损伤模型基础上,对模型参数进行分析;然后,根据工程应用的需要,适当简化疲劳模型,在连续损伤模型中引入合适的随机变量,定义疲劳可靠度分析的极限状态函数,假定多种未来可能的交通荷载和荷载增长模式,利用蒙特卡洛方法产生随机变量并计算失效概率;最后以香港青马大桥为例,讨论了该桥在不同荷载状况下使用120年后的疲劳失效概率.研究发现:若保持当前的交通状态 ...
徐幼麟, 陈志为
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