GM(1,1)加权模型预测建筑物沉降的研讨

采用灰色加权模型预报建筑物沉降未来发展趋势，其精度可靠、置信度高，预报结果是令人满意的。     

防撞梁受冲击载荷的试验研究

为了解决防撞梁受冲击载荷时强度计算问题,首次在自制的提升机模拟试验台上研究了提升容器对防撞梁的冲击过程,得到了不同工况条件下的防撞梁瞬态冲击力变化曲线。对不同工况下的曲线进行线性回归,得到对应的拟合方程。结果表明:防撞梁的瞬态冲击载荷不仅与冲击距离呈线性关系,而且和提升容器下降侧与上升侧的张力差、提升钢丝绳的弹性系数有关。因此,为了保证提升系统安全可靠的运行,必须有效地降低过卷时的冲击速度。     

淮北矿业集团工业电视图象远程传输系统的设计与实施

介绍了淮北矿业集团工业电视图象远程传输系统工程的设计、实施及主要特点。该系统采用模拟、数字两种传输形式 ,可实现图象传输、数字录像、录像查询等功能 ,为安全生产、调度指挥、科学决策、事故追查提供了直观、可靠的手段。     

基于快速DCT的画面内块的空域内插

主要介绍对边界像素进行约束来恢复画面中块的方法。这种方法基本假设前提是如果对块中丢失和它的边界像素进行DCT变换,含高频成分系数归化为零,这样就可以得到一系列线性方程,通过对这些方程求解就可以求出丢失的像素的近似值。这种方法只需对八个边界像素进行运算。     

Unrelated parallel machine scheduling with setup times and a total weighted tardiness objective

This paper presents several search heuristics and their performance in batch scheduling of parallel, unrelated machines. Identical or similar jobs are typically processed in batches in order to decrease setup times and/or processing times. The problem accounts for allotting batched work parts into unrelated parallel machines, where each batch consists of a fixed number of jobs. Some batches may contain different jobs but all jobs within each batch should have an identical processing time and a common due date. Processing time of each job of a batch is determined according to the machine group as well as the batch group to which the job belongs. Major or minor setup times are required between two subsequent batches depending on batch sequence but are independent of machines. The objective of our study is to minimize the total weighted tardiness for the unrelated parallel machine scheduling. Four search heuristics are proposed to address the problem, namely (1) the earliest weighted due date, (2) the shortest weighted processing time, (3) the two-level batch scheduling heuristic, and (4) the simulated annealing method. These proposed local search heuristics are tested through computational experiments with data from dicing operations of a compound semiconductor manufacturing facility.     

数值鲁棒的非线性滤波新方法

应用多维情形的二阶插值公式构造新型非线性滤波器。该滤波器不需非线性函数的偏导计算，便能代替常规的扩展卡尔曼滤波器，并有滤波精度高、数值计算稳定和适用范围宽等优点。仿真实例表明新滤波器具有较高的性能。     

正则化广义逆ERT 图像重建算法的研究

提出一种正则化广义逆ERT图像重建算法，利用ERT仿真软件得到的数据进行图像重建。与常用的ERT图像重建算法进行比较，重建出的图像经过统一的门限滤波后，反投影算法、灵敏度系数算法和正则化广义逆ERT图像重建算法重建图像的CSIE平均值分别为12％，9％和6％。研究表明，正则化广义逆ERT图像重建算法重建速度快，能显著提高重建图像的质量，适合于工业过程应用。     

基于J2EE的学习管理系统

LMS(学习管理系统)是以网络为基础的现代远程教育系统的重要组成部分，在介绍LMS和J2EE技术的基础上。提出了一种基于J2EE的LMS构架，并具体实现了这一构架。     

Finding Starting Points for Tracing Surface Intersections

1 Introduction Finding out proper starting points for all the intersection curves between two surfaces is a key process in numerical tracing methods for surface-surface intersection (SSI) problems. A number of methods [1] are introduced to calculate the starting points. Cugini et al. [2] introduced the concept of shrinking bounding boxes to calculate starting points. This method is simple and in some cases effective, but it may miss some intersection components. Muellenheim [3] presented an…     

Allocating Network Resources by Weight Between TCP Traffics

Under the current TCP/IP architecture,all TCP traffics compete for network resources completely fairly,which makes it difficult to satisfy applications‘‘‘‘‘‘‘‘ versatile communication requirements.This paper presents an improved TCP congestion control mechanism where the congestion window becomes ω(1-b)W rather than(1-b)W for every window W containing a packet loss.Theoretical analysis and simulation results show that it cann be easily implemented with less additional overhead and can easily perform network resource allocation by weighted parameter ω for traffics under the similar communication environments,whic can efficiently lead to guaranteed relative quqlity of scrviccs and improve network performances.