连续酸洗生产线钢卷数据跟踪的HMI设计

阐述了在酸轧联机后连续酸洗生产线的钢卷数据跟踪的设计，分别从HMI—INTOUCH软件的选用、生产线AB区数据跟踪的实现、动画实现的意义及HMI在机组上的成功应用逐一介绍。     

高速重轨生产线及武钢重轨生产线的建设

介绍了国内外100m及以上的高速重轨生产线,对生产线的生产设备、生产特点及生产产品分别进行了较为详细的叙述,并针对武钢的特点,对100m重轨生产线的改造提出了几点建议。     

特殊地形电力架空线的导线计算

电力架空线路是一项经常遇到的设计内容。当架空线路经过地形复杂的山区布线时,往往在悬挂导线的杆塔之间出现大高差或孤立档。用常规的平抛物线法计算导线的应力弧垂等参数的结果,与实际数值相差较大,这时需采用斜抛物线法来计算,本文对斜抛物线法的计算进行了探讨。     

切割机节能降耗与维护

介绍了板坯连铸切割机节能降耗、维护、维修办法 ,以及切割机升降系统的改造。     

Influence of Parameters of the Cutting Part of Taps on Threading Accuracy

We report the results of theoretical and experimental investigations to determine how the design and geometrical parameters of the cutting part of taps affect the dynamic characteristics and accuracy of thread cutting. Our investigations identified the main mechanisms that change the force characteristics during thread cutting. This makes it possible to determine measures to increase the accuracy and stability of thread cutting with taps. __________ Translated from Izmeritel'naya Tekhnika, No. 10, pp. 38–41, October, 2005.     

Fracture experiments on through wall cracked elbows under in-plane bending moment: Test results and theoretical/numerical analyses

Fracture assessment of pipe bends or elbows with postulated through wall crack is very essential for leak-before-break qualification of primary heat transport system piping of nuclear power plants. The methodology for fracture assessment of cracked elbows is still in developing stage. Any new development in theoretical aspect requires experimental validation. However, fracture test data on cracked elbows is not so abundant as straight pipes. The earlier experiments on cracked elbows were focused mainly on the determination of limit load. Other fracture parameters e.g. crack growth, crack initiation load or crack opening displacement were not reported in the open literature. Against this backdrop, a comprehensive experimental and theoretical program on component integrity has been initiated at Reactor Safety Division (RSD) of Bhabha Atomic Research Center (BARC), India. Under this program, a number of fracture tests have been carried out on elbows with through wall circumferential/axial cracks subjected to in-plane closing/opening bending moment. These test data are then thoroughly analysed numerically through non-linear finite element analyses, analytically through limit load comparison and also through comparison of crack initiation loads by finite element and R6 methods. These test data may be utilized in future for validation of new theoretical developments in the integrity assessment of through wall cracked elbows.     

Comparison of numerical methods for identification of viscoelastic line spectra from static test data

Viscoelastic line spectra are identified from creep or relaxation data of static experiments with different numerical methods, which may or may not depend on additional informations, to be provided by the user, about the unknown parameters. If the least square method is applied, a non‐linear optimization problem with non‐negative constraints on the parameters has to be solved. Its solution can be achieved directly by using a gradient‐based optimization algorithm like the projected Newton method of Bertsekas. However, appropriate starting values for the unknown parameters must be chosen. The problem can be alleviated by dividing the identification task into three successive steps, based on the Tschebyscheff approximation and the quadratic optimization method by Wolfe. Alternatively, the identification task can be reduced to a quadratic optimization problem, if the user provides additional informations about the distribution of the respondance times of the spectra. The windowing‐method of Emri and Tschoegl is based on this assumption. If the line spectrum is assumed to have equally distributed spectrum lines on the logarithmic axis, the identification problem can also be solved by standard regularization techniques, like the truncated singular value decomposition or the Tikhonov regularization. The choice of qualified respondance times as additional information requires some experience with the identification task at hand. Its results may be improved after several reruns of the algorithms. Various applications of the methods to test and experimental data are given and a comparison of their performance is discussed. Copyright © 2005 John Wiley & Sons, Ltd.     

Kruskal算法在局间中继线路网优化设计中的应用

讨论了用Kruskal决策方法进行多个电话交换局间中继线路网络优化设计的问题，并进行了实际的设计计算，计算结果表明该方法切实可行，而且对电信网(包括长途网、本地网和市话网等)以及别的网络线路的优化设计具有一定的实际意义。     

基于Shamir(t,n)门限方案的数字图象信息分存

本文基于密码学中的Shamir(t,n)门限方案研究数字图象存储与传输中的信息分存方法，主要结果是：对于给定的秘密图象A，发送者可以从任意选择的k幅（k=1,2,3，…）同样尺寸图象出发，生成作为伪装的N幅图象（N＞k)；接收者可以利用这N幅图象中k 1幅恢复图象A。本文介绍了利用拉格朗日插值算法给出的分存原理，并提出一类基于射影几何学的分存算法。最后给出了实验图例和视频作品例子说明研究方法的合理性。     

基于VB.NET开发的放码系统中关于放码线起始点的有效性判断

VB．NEI作为服装CAD放码系统的开发语言，可以充分利用其新特性来满足开发优质服装CAD软件的要求，并且对于将来实现服装CAD系统网络化提供了一种很强有力的技术支持。本文阐述了在基于VB．NET开发的放码系统中，如何实现对放码线起始点有效性的判断，即在编程语言VB．NET本身的．NET框架类库中找到一种相关属性，从其枚举定义中获得解决问题的主要思路。