近场散射与远场RCS的链条关系式

与远场RCS比较,近场散射问题更复杂、更普遍,且有重要意义。近场散射与远场RCS之间的关系是近场散射研究中的前沿课题之一。本文首先引用三天线概念,其次利用天线耦合公式及电磁场的互易定理导出简洁的链条关系式。最后利用线性系统理论中的基本概念对链条关系式作物理意义的解释。链条关系式在目标特性研究、远场和近场散射测量等方面有重要意义。     

Experimental Study of Seepage Properties of Non-Darcy Flow in Granular Coal Gangues

By using the steady-state seepage method, a patent seepage device together with the MTS815.02 Rock Mechanics Test System is used to test the seepage properties of non-Darcy flow in a granular gangue with five different grain sizes during the compaction. The experimental results show that the seepage properties are not only related to the stress or displacement level, but also to the grain size, the pore structure of the granular gangue, and the current porosity The permeability and the non-Darcy flow coefficient can be fitted respectively by the cubic polynomials and the power functions of the porosity, Formally, the flow in granular gangue satisfies the Forchheimer＇s binomial flow, but under the great axial and confining pressure and owing to the grain＇s crushing, the flow in granular gangues is different from that in rock-fills which are naturallv oiled un. As a result, the non-Darer flow coefficient may be negative.     

Study of Slope Reinforcement Force Based on FLAC

A slope will slide if the unbalanced force does not tend to zero when the stability of the slope is analyzed with the help of FLAC. Thus the ultimate reason of slope sliding is the unbalanced force determined by FLAC. The slope will remain stable if the unbalanced force is counterbalanced by a reinforcement force which is produced by a suitable reinforcement method. In this paper, the stability of the slope was analyzed by using FLAC, and the unbalanced force of the slope was obtained through the FISH function in FLAC. According to the equilibrium conditions, the relationship between the reinforcement force and unbalanced force was derived and accordingly the reinforcement force was determined. The reinforcement design was adopted by using pre-stressed anchor bars on the basis of the reinforcement force. An example is used to show that the effect of slope reinforcement based on the reinforcement force is safe and economical. The method doesn＇t need to suppose a sliding surface to obtain the reinforcement force, and it is also clear in physical meaning. So this method realized the organic unification of the stability analysis and the slope reinforcement.     

间歇机构智能测试系统

结合传统间歇机械的测试，介绍一种新间歇机构型的间歇机构智能测试系统的特点、组成及工作原理。     

智能型无主机扩音对讲电话系统的研制

研制了一种用于现代化大、中型生产企业中大范围、强噪声的生产场所的工业通信系统-智能型无主机扩音对讲电话系统，在系统结构设计的基础上，给出了绳路信令的传输格式，设计了系统硬件，编制了系统软件，并从软、硬件方面采取了抗干扰措施。     

IPX协议的结构分析与应用

介绍了IPX协议的特点，分析了IPX协议结构，并在此基础上利用IPX协议实现数据通信的工作原理，最后以一个实例文明IPX协议在数据通信中的应用。     

构建新时期高校学生思想政治工作新平台--信息网络技术对高校学生思想政治工作的冲击及其对策

随着信息网络技术的迅速发展,对高校传统的学生思想政治工作产生了前所未有的冲击。面对这种情况,构建高校思想政治工作信息化网络化平台成为了当务之急,以此能够全方位多视角地确保高校思想政治工作的开展。     

大型卷管机辊子的焊接修复

介绍了大型卷板机主动辊断裂后修复的技术过程及经济性分析，疲劳裂纹形成的原因；辊子材料材质的化学分析；补焊材料材质的确定；焊接 材料的选择；合理的焊接工艺参数的确定；焊前预热及焊后热处理方法；焊后超声波检查及其它检验方法；焊接修复的经济性分析，修复后的卷板机已正常运行，经超声波检验复查，焊缝处无裂纹产生，此种焊接修复方法是可行的。     

圆锯安全自控装置制动性能的微机测试系统

本文针对圆锯安全自控装置的制动性能，设计了一种实用的微机测试系统，同时介绍了该系统的关键技术，并对实测结果进行了综合分析。     

面向对象语义分析

针对语义分析进行了面向对象分析与设计，实现了类型检查，变量函数处理及将控制语句化为特殊函数进行处理，并就作用域分析设计了一种新颖的作用域树。整个分析过程简便灵活，具有良好的可操作性。