Results 61 to 70 of about 11,809 (167)
Guangtongxin yanjiu, 2006 文章从密集波分复用（DWDM）系统抵抗恶意侵扰的角度,分析了光放大段（OAS）中掺铒光纤放大器（EDFA）和OAS长度的配置对系统稳定性的影响,认为EDFA累积噪声会随着放大器的级数增加而呈线性增长,而且还会随着OAS损耗的增大而呈指数增长。系统的OAS数量和接收机灵敏度确定时,选择恰当的EDFA配置和OAS长度,可以达到提高系统稳定性的效果。
景琦 +4 more
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Open-pit mine soft rock slope internal row tracking pressure side control engineering：A case study at the south side of the first mining area of Hesigewula south open-pit coal mine [PDF]
Slope stability control is crucial for safe and efficient coal mining in open-pit mines with soft rock. To address the challenge of stabilizing dip soft rock slope rock slopes, the treatment engineering of inner row tracking pressure side of dip soft ...
Dong WANG +6 more
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Tungsten is inherently brittle and particularly prone to thermal stress concentration and crack formation during additive manufacturing processes such as laser cladding, which severely limits its engineering applications as a coating material. To address this issue, this study proposes an in situ toughening strategy involving the introduction ...
Guo‐Xing Chen +12 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2007 通过对比美国规范AISC360-05,欧盟规范EN1993以及我国规范GB50017关于轴压构件整体稳定设计的相关规定,发现AISC360-05因采用单一柱子曲线,因而不能充分考虑残余应力等因素对整体稳定承载力的影响;EN1993和GB50017分别采用5条和4条柱子曲线,因而较为科学;GB50017规定的整体稳定系数对大多数截面而言高于EN1993,但由于GB50017采用的抗力分项系数较低,其预测的承载力设计值仍低于EN1993和AISC360-05。
刘大林
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Application UAV technology semi-automatic identification dangerous rock masses on ultra-high steep slopes [PDF]
In the mountainous regions of Xinjiang, traditional manual survey methods for dangerous rock masses are often restricted by the complex and steep terrain.
Jinwu XIA +4 more
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World Affairs, Volume 189, Issue 1, Spring 2026.ABSTRACT In the study, we investigate the roles energy price inflation and its volatility play in shaping foreign direct investment (FDI) inflow into Sub‐Saharan Africa (SSA). Applying data from 37 SSA economies between 2002 and 2023 and the system generalized method of moments (GMM) as the estimation strategy to account for endogeneity, the results ...
Chimere O. Iheonu +2 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2006 针对一类含有不确定参数的离散时滞系统，研究了当传感器发生增益故障情况下的静态输出反馈鲁棒H∞容错控制器设计问题.系统中的参数不确定性满足广义匹配条件，传感器元件具有部分增益故障.根据Lyapunov稳定性理论和线性矩阵不等式(LMI)方法，分别给出了含有时滞记忆和无时滞记忆静态输出反馈鲁棒容错镇定控制器以及静态输出反馈H∞容错控制器的存在条件.通过求解一组线性矩阵不等式可以得到使得闭环系统渐近稳定并且H∞范数小于给定界y的鲁棒容错控制器.最后通过仿真示例说明本文提出设计方法的正确性.
XIELi(谢立)
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Failure mechanism and controlling measures of cut slope instability at Shouling temple, Luhuo County, Sichuan Province [PDF]
The Shouling temple in Luhuo County, Sichuan faces an urgent situation due to the construction of the Future Hall. A five-level excavation slope with a height of 21.8 m and a slope angle of 55° to 75° was formed on the northwest side of the site, leading
Gang LUO, Heming REN, Xingzheng WANG
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Dianci bileiqi, 2013 研究了不同温度（900～1040℃）下烧结的ZnO-Bi2O3系叠层片式压敏电阻器（ML-CV）的热稳定性和8/20μs电流脉冲冲击稳定性,发现1000℃烧结的MLCV试样的稳定性最好,其压敏电压变化率的温度系数低于1.67×10-4/K,电脉冲冲击后压敏电压和分线性指数的变化率分别仅为0.25%和4.27%。然后分析了烧结气氛对MLCV在1 mA直流负载作用下压敏电压稳定性的影响,发现当垫料中添加剂的质量百分比比试样中添加剂质量百分比高20%时,MLCV试样压敏电压的稳定性最高。
成鹏飞, 李盛涛, 张晓军
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Jianzhu Gangjiegou Jinzhan, 2020 温室单层球面网壳的稳定性在设计中起着控制作用,尤其是非对称(半跨均匀)荷载、初始几何缺陷(节点偏差)、矢跨比和拉索预应力等因素对温室单层球面网壳稳定性的影响还有待深入研究。基于构形易损性理论,提出了判断参数对极限承载力影响的指标,即节点构形度的差异系数。利用ANSYS软件对矢跨比分别为1/3、1/5和1/7的K6、K8型温室单层球面网壳进行了整体刚度矩阵的提取,并通过MATLAB自编程序计算得到节点构形度的差异系数,定性分析了各参数对极限承载力的影响与节点构形度的差异系数的关系。研究表明 ...
卢珍, 李会军, 饶颢
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