用MOD法评价齿轮精度指标的测量效率

介绍了模特排时法(MOD)的基本原理,用MOD法测定和评价了各项齿轮精度检测项目的测量效率,提出了合理选择齿轮精度检测项目的原则和方法。     

Upper and lower bounds for some depth-3 circuit classes

We investigate the complexity of depth-3 threshold circuits with majority gates at the output, possibly negated AND gates at level two, and MOD _m gates at level one. We show that the fan-in of the AND gates can be reduced toO(logn) in the case wherem is unbounded, and to a constant in the case wherem is constant. We then use these upper bounds to derive exponential lower bounds for this class of circuits. In the unboundedm case, this yields a new proof of a lower bound of Grolmusz; in the constantm case, our result sharpens his lower bound. In addition, we prove an exponential lower bound if OR gates are also permitted on level two andm is a constant prime power.Dedicated to the memory of Roman Smolensky     

PLT薄膜的制备及其非线性光学性能

用金属有机物热分解法制备了含镧ＰＬＴ薄膜，用Ｚ－ｓｃａｎ技术测试其非线性光学性能，结果表明；低镧的ＰＬＴ薄膜不显示非线性光学效应。高镧的ＰＬＴ薄膜非线性光学效应较强ＰＬＴ３０薄膜的非线性折射率高达０．３μｅｓｕ。     

模特排时法在生产平衡中的应用

运用作业测定中的模特排时法,对某公司装配线流程和节拍进行了详细的测定与分析,指出该工段在任务分配、操作方法、标准时间等方面存在的问题,并在此基础上,运用动作经济原则进行改善,并对改进前后的方案进行了对比分析,实践证明改进效果明显.     

MOD300系统在碳四装置中的应用及开发

阐述了MOD300系统在碳四装置的应用及开发情况，主要包括MOD300系统的硬件配置、重要控制回路的应用及在生产实践中对MOD300系统功能的开发。     

Quasi-static response and multi-objective crashworthiness optimization of oblong tube under lateral loading

This paper addresses the energy absorption responses and crashworthiness optimization of thin-walled oblong tubes under quasi-static lateral loading. The oblong tubes were experimentally compressed using three various forms of indenters named as the flat plate, cylindrical and a point load indenter. The oblong tubes were subjected to inclined and vertical constraints to increase the energy absorption capacity of these structures. The variation in responses due to these indenters and external constraints were demonstrated. Various indicators which describe the effectiveness of energy absorbing systems were used as a marker to compare the various systems. It was found that unconstrained oblong tube (FIU) exhibited an almost ideal response when a flat plate indenter was used. The design information for such oblong tubes as energy absorbers can be generated through performing parametric study. To this end, the response surface methodology (RSM) for the design of experiments (DOE) was employed along with finite element modeling (FEM) to explore the effects of geometrical parameters on the responses of oblong tubes and to construct models for the specific energy absorption capacity (SEA) and collapse load (F) as functions of geometrical parameters. The FE model of the oblong tube was constructed and experimentally calibrated. In addition, based on the developed models of the SEA and F, multi-objective optimization design (MOD) of the oblong tube system is carried out by adopting a desirability approach to achieve maximum SEA capacity and minimum F. It is found that the optimal design of FIU can be achieved if the tube diameter and tube width are set at their minimum limits and the maximum tube thickness is chosen.     

49-2泳池式反应堆非能动虹吸破坏孔方案设计及计算分析

基于安全考虑，49-2泳池式反应堆一回路冷却水系统将增设1个非能动虹吸破坏孔。在确定开孔位置的基础上，利用RELAP5/MOD3.3程序分别对孔径为1.5 cm和2.0 cm时的虹吸破坏能力进行了计算分析。结果表明：在停堆停泵状态下，一回路大破口失水事故时，两种孔径的虹吸破坏孔均能破坏回路中的虹吸作用，避免产生堆芯裸露的严重后果。为保守起见，最终选择虹吸破坏孔的孔径为2.0 cm。     

基于模特法的卧式钢卷包装生产线平衡改善

目的对A公司卧式钢卷包装其中一条生产线的瓶颈工序进行了改善,解决了钢卷包装生产线平衡率低的问题。方法运用预定时间标准法中的模特法(MODAPTS),把取消、合并、重排、简化(ECRS)和动作经济作为指导原则,并借助生产线平衡理论来改善生产线的平衡率。结果改善后的方案提高了生产线的平衡率,降低了生产节拍,提高了包装效率。结论运用模特法改善后,该生产线的平衡率由原来的52.98%提高到67.40%。     

PWR冷管段1%小破口失水事故实验研究

在高压综合实验装置（ＨＰＩＴＦ）上进行核电厂反应堆一次系统冷管段小破口失水事故（ＳＢＬＯＣＡ）模拟实验，破口方向为冷管段底部，破口面积为１％（ＮＳＢ－７工况）实验再现了核电厂发生小破口失水事故时的热工水力学现象，实验结果与ＲＥＬＡＰ５／ＭＯＤ２分析程序的计算结果上比较，验证了该程序对小破口失水事故的分析能力。     

核电站整体实验回路PMK-NVH装置模拟的小破口失水事故的分析计算

一、前言核电站的假想小破口失水事故是核电安全热工水力分析的一个重要方面,特别是在美国三里岛事故后,更加引起人们的重视。在国际原子能机构的组织下,作者根据匈牙利科学院提供的资料,使用核电安全分析