运用PLC技术改造385m~2凯利式叶滤机控制系统

根据生产实践 ,结合PLC的技术特点和 385m2 凯利式叶滤机的电气联锁特性 ,阐述了应用PLC技术 ,可进一步提高 385m2 凯利式叶滤机的运转率和自动化水平。     

折线滑面滑体的稳定分析方法的改进

本文根据刚体极限平衡分析原理，考虑各块体的力矩平衡和块间的嵌合作用，假定作用于块体的已知外力所产生的应力呈线性分布，推导出确定其作用力数值、方向和作用点，以及整体抗滑稳定安全系数的方法和公式。并通过实用研究了嵌合作用、分界面倾角等对反力分布和安全系数的影响，与常用方法的计算结果作了比较，说明本方法有较大的适用性，可应用于工程设计。     

KYN44-12型中置柜联锁装置的改进设计

介绍了12kV中置柜联锁装置的设计原则,分析了现有中置柜联锁装置在实际运行中存在的问题和不足,提出了改进和完善中置柜联锁装置的设计方法。实际应用表明,改进后的中置柜联锁装置的功能更加完善,安全性更加可靠,完全达到了五防闭锁要求。     

延迟焦化装置水力除焦的电气设计

介绍了延迟焦化装置中水力除焦部分电气设计的体会，如变频调速、联锁系统、联络系统等的设计思路。     

基于全电子设计方案的区域计算机联锁系统

介绍了基于全电子设计方案的区域性计算机联锁控制系统的技术方案和系统构成。详细阐述了系统中主控站和被控站设备的组成、功能和特点,给出了系统详细的结构框图。系统对于降低工程造价、充分发挥计算机性能、提高运输组织效率具有重要作用。     

基于CHECK方式的联锁仿真系统的设计与实现

针对城市轨道交通包括地铁、轻轨等的过渡信号系统的特点,研制了CHECK方式的列车运行控制系统1。文章在分析基于CHECK方式的联锁与闭塞系统的工作原理的基础上,给出了联锁仿真系统的数学模型,提出了用“事件调度法”这一仿真技术实现CHECK方式的联锁系统的仿真,并予以实现,满足了实际应用的需要。     

Computation of eigenvalues of a real matrix

This paper presents a computational procedure for finding eigenvalues of a real matrix based on Alternate Quadrant Interlocking Factorization, a parallel direct method developed by Rao in 1994 for the solution of the general linear system Ax=b. The computational procedure is similar to LR algorithm as studied by Rutishauser in 1958 for finding eigenvalues of a general matrix. After a series of transformations the eigenvalues are obtained from simple 2×2 matrices derived from the main and cross diagonals of the limit matrix. A sufficient condition for the convergence of the computational procedure is proved. Numerical examples are given to demonstrate the method.     

Experimental and numerical investigation of the debonding interface between an old concrete and an overlay

The paper focuses on debonding propagation along an interface, notably on the major influence of the interlocking between the two faces of the debonding interface. The aim of the study is to obtain the data necessary for relevant and efficient debonding modelling. The work associates experiment and simulation with the purpose of quantifying the interlocking along the interface. The overlay material investigated was a fibre reinforced mortar (FRM). Direct tension tests of notched FRM specimens were firstly conducted to obtain the tensile strength and the residual normal stress—crack width relationship. Its Young's modulus was determined from compression tests. The substrate-overlay interface was investigated by direct tension tests and flexure tests performed on composite substrate-overlay specimens. The direct tension tests provided the interface tensile strength and the relationship between debonding-opening and residual normal tensile stress. Three point flexural static tests informed on the structural behaviour of the interface. The debonding interface propagation was monitored using a video-microscope with a maximum enlargement of ×175. Using the identified and quantified parameters, modelling of the above mentioned static tests was carried out by the finite elements method using CAST3M code developed in France by CEA (Centre for Atomic Energy). The comparison of modelling and experiment results shows a good coherence and proves the important role of interlocking on the debonding mechanism.     

二乘(二取二)计算机联锁系统

对新型的二乘(二取二)计算机联锁系统的系统组成、工作原理、主要特点、应用前景进行了介绍。