麦尔兹窑煤气喷枪烧损原因分析与改进

对异常烧损的麦尔兹窑煤气喷枪,进行了金相、化学和扫描电镜检验等分析。分析结论:喷枪严重烧损主要是由于用材不当、超温运行、氧化腐蚀和硫化腐蚀所致。介绍实施的改进措施及其成效。     

应用RAPD标记对百合杂交种真实性鉴定的研究

应用RAPD标记对百合杂交种真实性进行了鉴定。研究表明:采用RAPD分子标记对百合杂交种进行早期鉴定是一种快速有效的方法。在本试验中杂种既具有相加性带型、单亲本带型,又具有融合双亲的特异带,并出现了新的带型。这样可以通过多个引物的应用,对杂交种进行早期鉴定。     

Analytical solution for a class of linear quadratic open-loop Nash game with multiple players

In this paper, the Nash equilibria for differential games with multiple players is studied. A method for solving the Riccati-type matrix differential equations for open-loop Nash strategy in linear quadratic game with multiple players is presented and analytical solution is given for a type of differential games in which the system matrix can be diagonalizable. As the special cases, the Nash equilibria for some type of differential games with particular structure is studied also, and some results in previous literatures are extended. Finally, a numerical example is given to illustrate the effectiveness of the solution procedure.     

线性二次闭环微分对策次优对策的双线性矩阵不等式方法

The suboptimal control program via memoryless state feedback strategies for LQ differential games with multiple players is studied in this paper. Sufficient conditions for the existence of the suboptimal strategies for LQ differential games are presented. It is shown that the suboptimal strategies of LQ differential games are associated with a coupled algebraic Riccati inequality. Furthermore, the problem of designing suboptimal strategies is considered. A non-convex optimization problem with BMI constrains is formulated to design the suboptimal strategies which minimizes the performance indices of the closed-loop LQ differential games and can be solved by using LMI Toolbox of MATLAB. An example is given to illustrate the proposed results.     

矩阵不等式约束下的矩阵逼近及鲁棒控制中的应用

This paper deals with a general class of optimization problems in robust control with given expectation value of performance index, which can be transformed into the problem of matrix approximation with matrix inequalities constraints. Theorem for existence and the uniqueness of the solutions of matrix approximation with linear matrix inequalities (LMIs) constraints is presented and algorithms for solving the problems of matrix approximation with matrix inequalities constraints are given based on the fact that such problems can be converted into the generalized eigenvalue problem (GEVP) of LMI. Examples are given to illustrate the main results of the paper.     

变时滞不确定控制系统的保性能控制器设计

本讨论了一类具有时变时滞不确定系统的无记忆状态反馈保性能控制器设计问题，系统的不确定性具有范数有界形式，时滞是时变函数甚至可以是无界函数，并且设计的控制器包含状态时滞，推导出了保性能控制器存在的充分条件，利用先进的线性矩阵不等式(LMIs)技术给出了保性能控制器的控制参数和保性能值，这些条件与时滞的导数有关，后给出一个无界时滞的仿真示例说明本方法的有效性。     

基于FPGA的QPSK高速解调器的设计与实现

根据无人机系统对数据链路的高速率、低误码的需求,分析比较了QPSK数字中频解调与零中频解调2种方案。针对本系统的特点,采用FPGA及DSP设计实现了一种高速QPSK数字零中频解调器,同时简要分析了高速数字解调器的工作原理,并介绍了高速解调器的硬件与软件实现。     

一种基于最佳比特分配策略的三维小波视频编码新方法

对基于三维小波变换的视频编码进行了研究。由于视频图像传统的三维小波变换结构存在着诸多不足．文章提出了一种改进的三维小波变换结构。在给定的比特率条件下，通过对使得解码图像量化误差达到最小的最佳比特分配策略进行研究，给出了在均匀量化情况下的改进三维小波变换结构的量化步长。实验结果表明该方法的压缩性能明显优于传统方法。     

基于GIS矿区图文综合管理信息系统的构建

本系统是基于地理信息系统的理论和技术,选用MAPGIS为平台、利用DELPHI语言进行的“矿区综合管理信息系统”软件的二次开发。该系统由工程文件管理、图层、查询、图文输出模块组成,可对多源地学数据进行综合分析和管理,有利于信息的综合和提取;也可应用于企业的生产管理、企业情况介绍和宣传等各个领域的动态管理,具有可操作性强、使用范围广的特点。     

pH值对Cu/Ni-P合金镀层的影响

研究了镀液pH值对Cu／Ni-P合金镀层硬度及耐蚀性能的影响。结果表明，镀液pH=9时，铜／镍磷双镀层具有很好的耐蚀性能和较高的硬度。