Research on the type and occurrence mechanism and prevention of coal pillar rockbursts [PDF]
, 2023 Coal pillar rockburst is a typical type of rockburst occurring in coal mining in China in recent years. How to summarize the engineering scale damage characteristics of coal pillar rockburst, reveal the mechanism of rockburst instability and formulate ...
Xiufeng ZHANG, Yang CHEN
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以水环境承载能力为基础的我国海岸带水环境管理制度体系设计 [PDF]
, 2018 落实生态文明、陆海统筹的战略离不开合理的海岸带水环境管理顶层设计。本文针对中国海岸带水环境管理构建了一套制度安排。这套制度安排以最新国家级规划和部委规章为基本政策依据,以资源环境承载力预警机制为核心内容,以满足水体的流动性及河海的连通性为基本原则,具备较强的科学性和可操作性 ...
毛竹, 薛雄志
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Bearing performance of wallboards in an electrostatic precipitator casing in consideration of stressed skin effect [PDF]
, 2016 For a wallboard in an electrostatic precipitator casing playing stressed skin effect under vertical uniform pressure on the top, the failure mode and bearing capacity were investigated by nonlinear finite element method.
PAN Li-cheng +5 more
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Damage characteristics and mechanical properties of superhigh-water material consolidated body under triaxial stress [PDF]
, 2022 In order to study the damage characteristics of superhigh-wate consolidated body under triaxial stress state, uniaxial experiments of superhigh-water consolidated body under different curing time (1, 7, 14, 21, 28 d) were carried out.
Fangtian WANG +4 more
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The Estimation of Environmental Carrying Capacity and Economic Value of Seaweed Cultivation in Kemojan Island [PDF]
, 2022 Eucheuma cottonni cultivation has been a major source of income among residents of Kemojan Island. Expansion of seaweed cultivation area in Kemojan Island waters nee ds to be anticipated by analyzing the carrying capacity of the aquatic environment ...
Bambang, Azis Nur +4 more
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Chinese Local Government Fiscal Spending and Environment Pollution under the Fiscal Decentralization [PDF]
, 2016 近四十年的改革开放在带来经济高速增长同时还有日益严重的环境质量问题。环境污染不仅仅危害居民的身体健康，更是直接威胁着经济的可持续发展。随着资源和环境压力的日趋凸显，经济结构转型和可持续发展受到严峻的现实冲击。政治集权和经济分权形成的特色财政分权体制是我国经济体制的重要组成部分，是公认的促进经济快速发展的主要制度之一。 目前研究相关制度对环境质量的影响成为环境污染问题的重要分支。因此，本文试图探寻特色的财政分权下中国地方政府的支出行为包括规模和结构如何对环境污染产生影响，并在此结论上提出相关政策建议 ...
杨惠珍
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Efficient Simulation Methods for Reinforced Concrete Columns with Encased Steel in High-rise Building Structures [PDF]
, 2016 型钢混凝土柱在建筑结构中往往是主要的承重构件之一，使用合适的数值模型分析其力学性能对高层结构抗震分析有重要的意义。本文综述了目前文献中已有的低含钢率恢复力模型相关研究，分析了其理论、计算流程和算法，并在通用有限元软件OpenSees中编程实现。本文详细推导了模型中基本参数的确定方法，并用于模拟实际高层建筑结构中的型钢混凝土柱。首先，本文用恢复力模型模拟了单根型钢混凝土柱的试验，通过对比验证了模型的精度，研究了其计算效率。其次，本文将恢复力模型用于理想32层高层结构中的单排型钢混凝土构件静、动力分析中 ...
曾志弘
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Behavior of a Flexspline in Harmonic Drive [PDF]
, 1900 谐波齿轮传动是利用柔性工作构件的弹性变形波进行运动或者动力传递的一种新型传动方式，因其具有体积小、重量轻、精度高、单级传动比大、承载能力高等诸多优点，在航空航天、机器人、数控机床等领域得到了广泛的应用。柔轮作为谐波齿轮传动的关键构件很大程度上影响了谐波齿轮传动的承载能力、使用寿命等。柔轮为弹性薄壁件，在交变载荷作用下易导致齿面磨损和疲劳断裂。柔轮强度、变形与应力分析对谐波齿轮传动过程中的疲劳断裂评估及传动性能研究具有重要的意义。 本文首先根据已知参数、实际工况和谐波齿轮传动啮合参数选取原则 ...
刘淳剑
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Study on Vibration Characteristic of Operational Bridge Based on Monitoring Data [PDF]
, 2016 桥梁结构监测系统能够对结构进行实时自动的状态监测，为评价运营桥梁的承载能力、使用功能和安全可靠性提供数据基础。近年来因为缺乏科学监测与管理所引起的桥梁垮塌事故频频发生，因此有必要利用监测数据对重要大桥的结构运营状态进行评估。本文基于厦门天圆大桥结构监测系统的实测数据，对单拱肋中承式梁拱组合桥型的振动特性进行研究，重点包括大桥的模态参数识别与短吊杆疲劳寿命估计两方面。本文主要工作内容如下： 首先，阐述了桥梁结构监测系统与模态分析方法的发展现状，总结了中承式拱桥结构特点与短吊杆疲劳问题 ...
何文朋
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Active and passive full-space collaborative control technology and engineering application in deep roadways [PDF]
, 2023 Due to the complex environment and ground stress at depth, and the various cross-sectional shapes and sizes, the damage types of deep roadways are diversified. The maximum ground stress, maximum compressive strength, and the corresponding support methods
Chengyi XU +4 more
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