Results 11 to 20 of about 1,536,266 (166)
Guangtongxin yanjiu, 2012 光纤的可靠性是保证光网络寿命的关键,可靠性由光纤的强度分布和疲劳行为共同决定。应用光纤的强度分布数据和蒙特卡洛方法,分析了筛选强度、应力腐蚀敏感性参数和载荷水平等因素对光纤可靠性的影响。分析结果表明,筛选强度的提高可改善筛选后光纤的强度分布,但同时会导致部分筛选后光纤的强度明显降低;按照基于幂定律理论的光纤疲劳行为模型,应力腐蚀敏感性参数的提高和光纤受到静载荷水平的降低可以提高光纤的理论寿命。
刘泰, 翟庆诗, 刘红峰
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Guangtongxin yanjiu, 2016 随着近几年智能电网的建设,电力通信网作为服务于电力行业的专用网,已成为电力系统的重要组成部分,其可靠性对电力系统的正常生产起到十分重要作用。文章提出了一种模糊层次分析法,采用模糊一致矩阵为各组成因素对电力通信网的安全可靠性影响作定量分析,该方法很大程度上提高了评价的科学性。通过计算发现,电源系统故障时间、双通道化率、节点成环率和光缆中断时间等因素对电力通信网可靠性的影响权重较大。
陈甜月, 刘逢清, 徐宁
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Guangtongxin yanjiu, 2006 自动交换光网络（ASON）信令的可靠性会直接影响业务的可靠性和服务质量,是信令研究中的一个重要课题。文章研究了基于受限路由的标签分发协议（CR-LDP）和扩展的资源预留协议（RSVP-TE）的可靠性机制。分析、总结了CR-LDP的邻居发现、会话建立和维护,以及RSVP-TE中的软状态、Hello过程及消息传送的具体可靠性扩展机制,并对二者进行了比较。
李健, 崔延军, 杨爱平
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500kV直流断路器快速机械开关典型故障特性及可靠性提升方法研究 [PDF]
, 2023 直流断路器是构建柔性直流电网不可或缺的关键设备。快速机械开关是直流断路器中承载电流、实现快速分合闸、耐受分闸恢复电压的核心组件，其结构复杂、动作速度快、电气应力严酷、可靠性要求高，因而设计研制难度大，任一环节出现问题均会影响直流断路器乃至柔直电网的安全可靠运行。然而，目前快速机械开关由于存在设计选型不合理、工艺管控不严格、试验考核不完善等问题，导致在实际工程应用中故障率较高。针对已应用于张北柔性直流电网试验示范工程的500 kV直流断路器，分析了直流断路器研制、调试 ...
张涛 +4 more
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract The stoichiometric ratios of carbon (C), nitrogen (N) and phosphorus (P) serve as important indicators for assessing nutrient balance in forest ecosystems, but their relationships with photosynthetic dynamics require deeper characterization.
Minghao Chen +9 more
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Reconstructing Old Chinese *‐ts Using Han‐Time Material
Transactions of the Philological Society, EarlyView.Abstract Baxter & Sagart (2014b) reconstruct *‐Vt‐s on the basis of Middle Chinese reflexes in ‐jH (from some OC *‐s) coupled with either etymological or graphic connections to words in Middle Chinese ‐t. This approach, while perfectly sound, can suffer from lack of etymological or graphic data, leading to missed reconstructions. Since Old Chinese *‐ts
Julien Baley
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Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 6, Page 836-851, June 2026.ABSTRACT Objective To determine whether ultrasound is non‐inferior to positron‐emission tomography/computed tomography (PET/CT) and diffusion‐weighted magnetic resonance imaging (DW‐MRI) in terms of overall diagnostic accuracy for the preoperative assessment of pelvic lymph‐node status in cervical cancer.
F. Frühauf +14 more
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ADAPTING TO A FOREIGNER IN THE FAMILY: TAIWANESE MOTHERS IN LAW AND TRANSNATIONAL MARRIAGE [PDF]
, 2011 During the past two decades, a body of literature has emerged on marriage between Taiwanese men and South-East Asian women. Almost all the studies that explore aspects of the lived experience of female marriage migrants have mentioned the role of mothers-
Chi, Hsing Miao
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Veterinary Dermatology, Volume 37, Issue 3, Page 353-364, June 2026.ABSTRACT Background Canine atopic dermatitis (cAD) is a multifactorial, inherited skin disease, estimated to affect ≤ 15% of dogs. Studies of skin messenger mRNA in cAD currently use invasive methods, including blood sampling and biopsy collection, whilst advances in human atopic dermatitis study methodology have demonstrated reliable use of minimally ...
Xavier Langon +5 more
wiley +1 more source
, 2005 文章概述了光传送网络技术的发展趋势,分析了影响光传送网可靠性和安全性的主要因素,并从传输设备到整个网络系统,运用层层推理的方法,基于常见的网络模型详细描述了传送网络可用率的计算过程。文章还就如何增强光传送网可靠性和安全性,描述了运用保护和恢复这两种机制在提高传送网可靠性中的重要意义。最后总结了不同因素对传送网可用性影响的敏感性 ...
王孝明
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