Results 41 to 50 of about 11,536 (165)
A critical review of the significance of elitism and pluralism to disaster risk management
Risk, Hazards &Crisis in Public Policy, Volume 16, Issue 1, March 2025.Abstract Disasters and disaster risks are social phenomena that take place in a political space shaped by different political ideologies. Despite this connection, the field of disaster risk management has been developed without a deliberate incorporation of political theories.
Paul Chipangura, Dewald Van Niekerk
wiley +1 more source
Numerical Simulation and Performance Analysis of a Scramjet Based on Three Dimensional Design [PDF]
, 2015 本文以超燃冲压发动机为研究对象，将其中的各部件置于整个发动机的大环境下进行了设计与性能分析。 以流线追踪三维Busemann型面作为进气道，研究了其不启动时的流场特征以及非设计点下的性能。随后将该进气道与隔离段模型相结合进行了数值模拟，结果表明增加隔离段长度可提升极限反压，但长度越长，反压比提升的幅度越小；进气道来流的影响使隔离段在反压作用下的流场呈现不均匀性，反压越高，不均匀性越强，进气道所受的压阻也越大。 在燃烧室设计过程中，以均匀来流为条件分别考察了边界层厚度、狭缝抽吸 ...
方骁远
core
Influence of ultra-close undercrossing shield on deformation of existing tunnels [PDF]
With continuous development of urban construction in recent years, many Chinese cities have successively developed and increased the construction of urban rail transit projects, and the construction of the metro engineering causes surrounding surface ...
DAI Zhengbin1, 2 , LU Yunlong1, 2
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Review of Policy Research, Volume 42, Issue 2, Page 393-422, March 2025.Abstract Resolving policy potential disparities and coordinating among multiple stakeholders are essential components of effective policy implementation. Nevertheless, there has been limited scholarly attention to the causes and remedies for grassroots implementation challenges, particularly through the lens of new collective action theory and the ...
Chen Ran +3 more
wiley +1 more source
Evaluation Technique of Loss of Coastal Ecosystem Services Caused by Sea Reclamation Project [PDF]
, 2012 随着海岸带城市的不断发展，土地资源稀缺已经成为沿海城市经济发展的一项重要限制因素。虽然填海工程可以解决沿海地区人多地少的矛盾，但是也造成了海岸带生态系统自然属性的永久性改变。然而，“由海变陆”的生态代价却往往被人们忽视。最根本的原因在于海岸带生态系统提供的服务大都属于公共物品。一直以来“资源无价”的观点促使人们忽略了海岸带生态系统的重要性。填海工程环境影响评价作为海洋工程环境监督管理活动的首要环节，对于实现海洋资源可持续利用具有重要的意义。然而，生态损耗还尚未纳入经济损益分析 ...
刘旭
core
Experimental Study on Frictional Pressure Drop Characteristics of Wire-wrapped Bundles in Transition Flow [PDF]
The investigation of frictional pressure drops in wire-wrapped bundles at low flow velocities is crucial for thermal-hydraulic studies of sodium-cooled fast reactor cores.
LI Hongrui1, , XUE Xiuli2, ZHOU Zhiwei2, ZENG Zehua1, LUO Rui1,
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Policy &Internet, Volume 16, Issue 4, Page 750-763, December 2024.ABSTRACT Hegemonic digital transformation for development (DX4D) initiatives, global digital development initiatives concerning the public sector, function as a contemporary ‘anti‐politics machine’. This is evidenced by the global extractive and surveillant dynamics surrounding these initiatives' core projects, such as digital public infrastructures ...
Nai Lee Kalema
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Jixie chuandong, 1992 本文由闪温准则导出了材料焊合系数的计算公式,经FZG齿轮胶合试验证明该公式的计算误差不大,能够满足工程应用的需要,并据此计算了25Cr2MoVA钢四种典型渗氮工艺的材料焊合系数。
赵少甫, 陈秀玉
doaj
Development of overlying strata collapse and water-conducting fractured zone in shallow coal seams mining [PDF]
Shallow underground mining of coal seams has significant impacts on the overlying rock formations, not only exacerbating surface subsidence but also potentially leading to surface and groundwater loss, thereby affecting the development and safety of the ...
Hui SHANG +4 more
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