Results 31 to 40 of about 14,028 (168)
Study on pressure relief and permeability enhancement effect of cutting coal seam with diamond-bead wire saw [PDF]
In order to explore the pressure relief and permeability enhancement effect around coal seam slot cut by diamond-bead wire saw, firstly, the mechanical model of a doubly clamped roof beam based on the stress of the slot roof was established to analyze ...
Chen WANG +8 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Engineering the semiconductor/dielectric interface is crucial for advancing two‐dimensional (2D) nanoelectronics, where device performance is predominantly governed by interfacial defects and dielectric coupling. Optoelectronic doping based on carrier trapping at the h‐BN/SiO2 interface has enabled non‐volatile and reversible carrier ...
Zhe Zhang +6 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2016 H形钢悬臂柱柱脚焊缝的疲劳性能对钢柱疲劳寿命起控制作用,应用热点应力的表面外推法,通过建立数值计算模型,对弯矩、扭矩和弯扭共同作用下柱脚焊缝热点应力进行了分析。选取翼缘与底板厚度比(t1/t2)、翼缘和腹板厚度比(t1/t3)、腹板厚度(t3)与型钢截面高度(h)作为影响因素,对热点应力集中系数SCFhs进行参数分析。分析结果表明,其它条件不变的情况下,弯矩作用下的热点应力集中系数SCFmhs随着(t1/t3)和(t3)的增大而减小,但与(t1/t2)关系不大,h增加可导致SCFhs增大,建议取为1 ...
张晨阳, 芦燕
doaj
Gaoya dianqi, 2021 不同结构型式的特高压直流滤波器耦联回路中滤波电容在地震作用下地震响应特征相差较大,其抗震性能需要进行深入研究。文中以某特高压悬吊式直流滤波电容器和支撑式直流滤波电容器为原型结构,建立了两类特高压直流滤波器耦联回路有限元模型,从位移、内力和加速度3个方面对比了三向地震作用下两类回路中滤波电容器抗震性能。结果表明:在顶层高压管母线连接处悬吊式滤波电容器的水平双向合位移比支撑式大,且悬吊式加速度响应峰值多集中在底层而支撑式多集中在顶层。悬吊式滤波电容器内力安全系数满足规范建议值且富余度较大 ...
赖炜煌 +4 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Ceramic reinforcement is crucial for crafting ultrastrong and wear‐resistant metallic components. However, pronounced stress concentration and strain incompatibility at ceramic–metal interfaces often trigger microcrack initiation and ceramic spalling exacerbating friction under sliding conditions.
Dongting Li +8 more
wiley +1 more source
基于AWE GCB/GIS自力型触头接触压力分析及应力集中系数初探
Gaoya dianqi, 2014 为实现参数化分析,在AWE（ANSYS workbench environment）集成的DM（design modeler）环境中建立模型,并合理简化。在AWE集成开发环境下,设置自力型触头的工况对其进行接触压力分析,并对结果进行了理论计算校核。考虑到触指根部两侧小范围存在应力集中现象,利用DOE法（the design of experiments method）建立对应的参数化数值模拟,并对其小样本采集分析。根据计算结果确定其应力集中系数在1.201.27范围内变动。
张沛文, 陈伯荣, 周庆清
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Jianzhu Gangjiegou Jinzhan, 2021 针对我国装配式钢结构建筑推广应用过程中的标准化、模块化和产业化需求,提出了一种竖向承重体系和抗侧力体系相分离的新型组合结构体系,并基于这一概念提出了一系列适用于多层和高层住宅建筑的高性能结构方案。通过大比例试验、高效数值模拟和性能评价等方法对该种新型体系的抗震性能开展了深入研究,充分证明了其在地震区应用的可行性。另外,开展了与该新型结构体系相配套的集成式楼盖和一体化外围护墙板的研究,分别围绕集成式楼盖及节点的力学机理和一体化外围护墙板的保温性能、隔声性能、受弯性能以及与结构的协同受力性能展开了系列研究 ...
赵鹤 +8 more
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Temporal and spatial evolution law of microseisms and induced impact mechanism in complex spatial structure area of steep and extremely thick coal seam [PDF]
The occurrence of coal mine rock burst disasters is closely related to the spatial structure, especially in the complex spatial structure area. It is of great significance to master the law of coal and rock catastrophe and reveal its mechanism in the ...
Changliang LU +8 more
core +1 more source
Asian Politics &Policy, Volume 18, Issue 2, April 2026.ABSTRACT This study reframes Hong Kong's Legislative Council geographical constituency elections as a case of limited competition produced by institutional design. Using candidate‐level data, we examine how organizational resources and competition structure shape electoral outcomes under a mixed system that combines proportional representation in GCs ...
Pei ZHI, Fen LIN
wiley +1 more source
Shuitu Baochi Xuebao, 2018 坡面水流的输沙能力是影响土壤侵蚀过程的重要参数之一，加强坡面集中水流输沙能力的研究有助于深入理解集中流发生机理，并为防治集中流侵蚀发生提供科学依据。采用室内集中流放水冲刷试验，以黄土高原典型黄绵土为研究对象，研究了集中流输沙能力与放水流量和坡度以及与单宽流量和坡度之间的关系，同时对集中流水力参数和输沙能力的相应关系进行了研究。结果表明:集中流输沙能力随着坡度和放水流量的增加而增加。多元统计分析建立输沙能力与坡度和放水流量之间的幂函数关系发现坡度指标对输沙能力相对放水流量影响更大，而在坡度和单宽流量作用下，
师宏强, 谷
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