一种基于遗传算法的缺陷集合最小化方法

文章根据遗传算法,提出了一种简化导致软件系统故障的缺陷集合的方法。在软件缺陷注入测试中应用此方法,可以快速地从注入缺陷集合中分离出导致软件系统故障的缺陷子集,进而可以方便测试者定位出被测软件系统中的脆弱点。     

核电站计算机支持系统的研制

压水堆核电沾计算机支持系统CSSNPP是为操作员以及相关人员培训研制的一个核电站计算机支持系统。系统不仅能够处理异常运行时电站的监测与诊断，而且能够处理应急运行时的监测与诊断。     

基于动作推导引擎下的故障检测方法

本文根据文[2]介绍的软件管理者方法，提出了基于动作推导引擎的软件管理者方法。软件管理者单元是一种自动的实时监控软件故障的软件工具，适用于实时软件系统特别是通信类软件系统的故障侦测。它通过监控目标系统的输入和输出，使用获得的输入和目标系统的管理模型推算出对应此输入序列的期望输出值．与目标系统的实际输出做比较．如果实际输出没有在期望输出集中，则管理者单元断定目标系统出现错误。基于动作推导引擎的软件管理者方法，采用了动作推导引擎产生的目标系统管理模型，使该管理模型独立于软件管理者方法。可以实现管理模块与动作推导引擎同步实时更新．而不会导致软件管理者单元的改动。     

基于工作流的电厂缺陷管理系统

通过对电厂缺陷管理流程的分析，利用一种新的方法实现其工作流定义。在工作流定义的基础上，对电厂缺陷管理进行权限控制、消息传递、业务审计及并发控制。系统实现了电厂缺陷管理的自动化闭环控制，并能适用于不同缺陷管理模式的不同电厂。     

几起35kV集合式并联电容器故障分析

集合式并联电容器已广泛用于电力系统。本文介绍了对几种电容器组运行故障原因的发现和分析 ,以及解决的方法。尤其对由于差压保护动作 ,导致投运失败的原因和处理方法作了详细的介绍。文章最后对电力系统的运行保护设定和制造厂的制造提出了建议     

某发动机Ⅱ级涡轮叶片排气边裂纹分析

对WP13F发动机Ⅱ级涡轮叶片排气边裂纹、断裂进行了汇总分析。该叶片裂纹、断裂都属于以低周疲劳为主的高、低周复合疲劳失效模式；在疲劳起始区均存在一个黑色粗糙区(月牙形多晶区)；断口上存在的大量粗大初生碳化物降低了材料的断裂韧性，加速了疲劳裂纹的扩展。     

Elastic-plastic fracture mechanics assessment of test data for circumferential cracked pipes

This paper presents experimental validation of two reference stress based methods for circumferential cracked pipes. One is the R6 method where the reference stress is defined by the plastic limit load. The other is the enhanced reference stress method, recently proposed by the authors, where the reference stress is defined by the optimised reference load. Using 38 published pipe test data, the predicted maximum instability loads according to both methods are compared with the experimental ones for pipes with circumferential through-thickness cracks and with part circumferential surface cracks. It is found that the R6 method gives conservative estimates of the maximum loads for all cases. Ratios of the experimental maximum load to the predicted load range from 0.54 to 0.98. On the other hand, the proposed method gives overall closer maximum loads than R6, compared to the experimental data. However, for part through-thickness surface cracks, the estimated loads were slightly non-conservative for four cases, and possible reasons are fully discussed.     

Modification of Dugdale model to include the work hardening and in- and out-of-plane constraints

In the paper the classical Dugdale model has been generalized taking into account the influence of the specimen thickness, in-plane constraint as well as the effect of the strain hardening on the level of stress distribution within the strip yield zone (SYZ). Modification has been performed utilizing Huber, Mises, Hencky as well as Tresca yield hypotheses and Guo Wanlin Tz coefficient. Results are presented in a form useful for applications. As an example, the modified model has been applied to draw the failure assessment diagram (FAD). New FAD’s have been compared with others adopted from the SINTAP procedures.     

CDIC颌面及颅外科用钛骨固定器的安全风险分析方法

本文根据国家有关规定和相关标准，对三类医疗器械产品CDIC颌面及颅外科用钛骨固定器进行安全风险分析方法进行了介绍，应用该方法分析后，结论是产品的潜在风险均分布在广泛可接受区和合理可降低区，合理可降低区的潜在风险，只要实施了降低／控制风险措施，即可将风险降到最低。产品的受益远大于潜在风险，由产品造成的潜在风险是可以接受的，临床使用是安全的。     

Experimental study on RC beams with FRP strips bonded with rubber modified resins

This paper presents the effects of adhesive properties on structural performance of reinforced concrete (RC) beams strengthened with carbon fiber reinforced plastic (CFRP) strips. The epoxy adhesives modified with liquid rubber of different content were used to bond the CFRP strips, and four point bending experiments were carried out on RC beams. The experimental results show that different CFRP strip thickness of 0.22 and 0.44 mm resulted in a transition of failure mechanism from interfacial debonding along the CFRP-concrete interface to concrete cover separation starting from the end of CFRP strips in the concrete. Moreover, it is suggested that no matter interfacial debonding or concrete cover separation, the rubber modifier enhanced the structural performance by increasing the maximum load-carrying capacity and the corresponding ductility, compared with the beams bonded with a neat epoxy resin. The improvement of structural performance due to modified adhesive was associated with the modification of stress profiles along the CFRP-concrete interface especially the stress concentration at the end of FRP, and the enhanced interlaminar fracture toughness. Rubber modified epoxy therefore is worth further studying in practical repair applications.