高压电压互感器的可靠性数据统计分析     

陈宗穆  江荣汉 《湖南农业大学学报(自然科学版)》1989,16(3)

本文根据高压电压互感器现场运行的调查材料,用概率统计的方法求出其寿命函数,并估计其平均故障率,为高压电压互感器的可靠性管理提供依据和参考。  相似文献   

提高农用潜水电泵修复可靠性的方法     

齐保林  贾端红 《农机化研究》2004,(3):209-210,292

对以QY系列为主体的农用潜水电泵修复可靠性低、寿命短的问题，提出了改进措施，从而有效提高潜水电泵修复可靠性，并延长使用寿命。  相似文献   

机械组件的固有可靠寿命研究     

平斌 《湖南农机》2014,(8)

简述机械组件的可靠度的概念,比较机械组件与电子元件在可靠度上的不同特点。机械组件可靠度数据采集难度大,应做好机械组件失效分析,以在设计附件提高可靠度。  相似文献   

基于可靠性视角的交通堵塞模型     

梁小林  牛彩云  雷孝宁 《湖南农业大学学报(自然科学版)》2014,(4):65-67

本文从可靠性角度研究了交通堵塞模型.首先，通过合理的假设，建立了道路系统的可靠性模型.然后，利用补充变量方法及拉普拉斯变换技术，得到了道路系统的畅通率、稳态堵塞频度和首次堵塞前系统的平均畅通时间等道路系统评价指标.  相似文献   

汽车侧面碰撞中乘员约束系统的可靠性优化     

肖志  叶映台  李伟平  杨济匡 《湖南农业大学学报(自然科学版)》2011,38(9):39-43

在汽车侧面碰撞中，约束系统对降低乘员的伤害起到非常重要的作用.本文采用MADYMO仿真分析软件，建立某车型侧面碰撞的约束系统仿真模型；考虑了髋部推动块的压溃力、气囊起爆时间、气体质量流量和气袋排气孔面积对乘员损伤的影响，建立了乘员损伤指标的响应面模型；基于蒙特卡罗随机模拟，进行了侧面碰撞乘员约束系统的可靠性优化.结果表明，优化后的约束系统设计方案满足可靠性目标要求.  相似文献   

Validation of the Accutrend Plus point‐of‐care triglyceride analyzer in horses,ponies, and donkeys          下载免费PDF全文

Michaela C. Pongratz Dr. med vet  DECEIM  FVH  Hannah K. Junge Dr. med vet  Barbara Riond Dr. med vet  FVH  Colin C. Schwarzwald Dr. med vet  PhD  DACVIM  DECEIM 《Journal of Veterinary Emergency and Critical Care》2016,26(5):682-690

  相似文献   

条形浅基础极限承载力的滑移线解     

徐德馨  周玉琴  傅旭东 《中国农村水利水电》2006,(2):86-88

当网格剖分足够密时，采用差分解法可得到具有足够精度的有重土静力极限平衡数值解。根据大量计算分析，揭示了有效旁侧荷载宽度L、无量纲极限承载力 / 与内摩擦角 、无量纲参数λ的内在规律，据此将滑移线法数值解拟合为简洁的解析表达式，并在理论上证明了这一规律。通过与几种经典承载力公式的比较和分析，综合对该拟合公式的可靠度分析，论证了其正确性和可行性。  相似文献   

NETWORK FEOW APPROACH TO RELIABILITY EVALUATION IN IARGE SCALE NETWORKS BY MIXING INCREASING ELOW WITH DECREASING FLOW     

Chen HuaZhou Jiaqi 《保鲜与加工》1990,(4):1-6

Based on the maximum flow principle about networks, a network flow approach to reliability evaluation in large scale netwerks ty mixing inereasing flow with decreasing flow is proposed in this paper.This approach gets the initial flow of each branch in a r.etwork associated with a state of the retwork by decreasing flows of some branches correlative to another state of the network.As a result, the number of flow compute required can be reduced enormously.The numerical example shows that the approach is powerful. The comparison of this approach with the minimal cutset one is also given in this paper.  相似文献   

A New Monte Carlo Method Based on State Analysis     

Ran Li Ren Zhen Huang Wenying 《保鲜与加工》1993,(6):21-26

A new Monte Carlo Method for system reliability evaluation is proposed in this paper. The repeated sampling of system states with relatively great probabilities is avoided in the simulation,thus the sampling efficiency is significantly improved. Besides,the negative correlations used in different trials can further reduce the estimated varinaces. The sparse matrix technique is employed to reduce the memory requirement and to save the computer time. Comparative studies show that the method proposed is of great value and the application to the IEEE reliability test system (power system) is successful.  相似文献   

VARIABLE DAMP STRUCTURAL RELIABILITY DUE TO MULTIPLE RANDOM EXCITATIONS AND SENSETIVITY ANALYSIS     

Zhang Xiangwei Xu Meihe 《保鲜与加工》1991,(4):8-15

The reliability of random vibration is discussed,and then by using the first order perturbation method and with the aid of relation of the systemic response function to the first order sensetivity of variable damp parameter, the rate of change of structural reliability indication is derived, therefore the constraint equation to guarantee reliability for the structural optimization design is proved and the satisfactory result is obtained,test and the practicability of this method is tested.  相似文献