故障测试

By means of fault injection experiments for the BIT systems based on the above BIT arithmetic such as the simulator for avionics and the i960 avionics dada processing unit, the integrativity, generality, high efficiency of the above BIT arithmetic have been shown.

针对上述故障模型，首次在国内航空领域完整地提出BIT测试算法，并加以工程实现，通过在基于上述算法的BIT系统，如航空电子模拟器及i960航空电子数据处理单元进行的故障注入试验，证明了这种BIT测试算法的全面、通用和高效性。

Design for Testability; test selection ; boolean logic ; fault detection ; fault isolation

测试性设计；测试选择；布尔逻辑；故障检测；故障隔离

This method can be used to reduce power dissipation of combinational logic.

本文通过上述问题的研究，在设计流程的不同阶段解决自测试设计的测试功耗问题：在高层综合阶段，引入功耗约束和模块随机响应模型，自动生成低测试功耗、低面积开销的RTL电路结构；在逻辑综合阶段，针对测试功耗分别优化了电路结构和测试向量生成电路，以微小的故障覆盖率和面积开销为代价，最大程度降低测试功耗。

The varying environmental factor with time can be derived from actual failure data set.

考虑了运行阶段和测试阶段环境的不同，根据实测数据得到了变化的环境因子，并且根据测试阶段的故障检测率和变化的环境因子，转化得到了操作运行阶段的故障检测率。

Failure data haven been collected happened in the integration testing phase, and failure data in the unit testing phase are not collected.

所收集的只是综合测试阶段所出现的故障，单元测试所出现的故障没有收集。

Aiming at the characteristic of network fault,MM* model and Fault Tree Analysis are introduced into network fault diagnosis modeling.An algorithm is proposed which analyzes and diagnoses network fault,extracts the minimum cut sets quantificationally with Fault Tree Analysis,then detects and orients network fault with MM* model by testing the geminate nodes selected from minimum cut sets.

针对网络故障特点，将MM*模型和FTA方法引入网络故障诊断建模中，设计了一种用FTA方法进行网络故障的系统分析与诊断，并定量求解出所有故障可能的最小割集，然后用MM*模型从最小割集中选取测试点对进行单点故障检测与定位的网络故障诊断算法。

From nine-value set operations,especially the operation of convert mapping between sets,various cubetab les have been derived directly.

通过九值集合运算，特别是集合的逆映射，直接导出各种立方表，然后同D 算法一样，对故障的测试立方进行D 驱赶和一致性相交运算，求出故障的测试。

The system of the characteristic tests and fault diagnoses of pumping station is a complicated one combining multifold technologies such as control technology, computer technology and fault diagnose technology. At present the research on this field is at the underway stage.

泵站特性测试与故障诊断系统是一个综合测试控制技术、计算机技术、通信技术和故障诊断技术等多种学科知识，结构复杂的体系，目前国内对于这一领域的研究还处于起步阶段。

It is concluded that the process is a procedure with the system entropy reduced by degree.

在此基础上，通过综合考虑测试与测试、测试与故障隔离结论的关系，提出了系统级故障隔离的间接熵法。

On the basis of electrical network characterization, Chapter 5 presents a new principle to detect PCB's fault first time. Three methods of online test for electrical network characterization are described in detail. Then, a hierarchical, combinatorial approach is firsfly presented. The test efficiency of this method is studied also. The experiment result shows that the new approach can greatly enhance the test efficiency of fixtureless tester under the requirement of 100% test for PCB's connections.

本文第5章利用集成电路的输出特性，首次提出了一种新的印刷电路板连接故障的检测原理，给出了三种印刷电路板电气网络输出特性的在线测试方法；在此基础上，首次提出并实现了基于飞针式在线测试仪的层式组合测试思想，研究了这种方法的检测效率；应用实例表明这种方法在不降低对印刷电路板连接故障100％测试的要求下，可以有效地提高飞针式在线测试仪的检测效率。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。