基于小波分析的噪声抑制和数据压缩综合技术——SAR图像的噪声抑制与数据压缩

本文给出了一种基于小波分析方法的噪声抑制技术,它具有运算简便和能在保持原图精度的同时有效地降低斑点噪声影响的优点。更重要的是,它将噪声抑制与数据压缩过程同时进行,对ＳＡＲ雷达图像的处理取得了良好的效果。     

人机系统可靠性分析的发展

人机系统可靠性在很大程度上取决于人的可靠性,因此,人的失误及其可靠性分析的研究就成为多学科交叉渗透的面向２１世纪的重点研究领域,已上升到一门新学科的高度．本文在论证人可靠性分析的重要性和迫切性的基础上,详细地评述了人可靠性分析的历史背景、研究内容及其应用范围．最后,文中展望了人可靠性分析的研究方向并拓展出相关的研究领域,指出了该学科得以深入发展的研究途径．     

用面向对象程序设计神经网络的算法类库

依据面向对象的程序（ＯＯＰ）设计的优越性,用Ｃ＋＋语言,针对神经网络ＢＰ算法和ＧＡ算法,编写了神经网络及其算法类库：目的是为神经网络学习算法的发展和深入及其应用于工程提供方便和有利工具．且给出利用该类库实现的非线性系统辨识结果     

批量制造业交货窗口提前／拖期生产计划方法

建立批量制造企业在交货期窗口下的提前／拖期生产计划模型,将交货期窗口（ｄｕｅ－ｗｉｎｄｏｗ）概念引入到带有能力约束的提前／拖期生产计划中,拓宽了生产计划问题研究的范围．并利用数学推导,将所建模型转化为线性规划模型,使得该模型运用单纯形法就可求取精确的最优解,从而解决了开发中的ＣＯＮＷＩＰ集成化生产管理软件对不确定交货期主生产计划的编制问题．     

过程系统训练仿真器的面向对象分析与设计

针对过程系统训练仿真所存在的问题,结合面向对象的系统分析与设计的特点,提出了基于Ｂｒｏｗｓｅｒ／Ｓｅｖｅｒ体系结构的采用面向对象技术设计的新型过程训练仿真系统的结构及其实现思路。     

Operational Patterns of Industrial Symbiosis Network in Industrial Cluster District Based on Circular Economy Theory

Industrial symbiosis network （ISN） is an efficient organizational form for improving resource recycling and efficiency in industrial cluster district. Because of the variety of industrial cluster district formation model, the industrial symbiosis network is different with each other. Based on the circular economy theory, combing with international tendency of cluster district, the paper puts forward the relying-on-oriented industrial symbiosis network. Meanwhile, it also analyzes its organizational mechanism, operating pattern and environmental performance. Through the above efforts, we hope it could be helpful for industry cluster district sustainable development in China.     

船舶航向与柴油主机联合LPV鲁棒控制及仿真

船舶航向与柴油机推进装置是紧密耦合的,但长期以来对它们的控制是完全独立的.根据线性变参数(LPV)系统设计原理,提出了基于LPV的船舶航向与主机联合控制.建立了以船速等为变参数的船舶航向与主机联合控制的LPV模型,采用LPV多胞设计方法,通过状态反馈对闭环极点进行配置,分别设计具有H∞鲁棒性能的航向与主机LPV控制器,实现二者的联合控制.以5446箱班轮为被控制对象,仿真验证了航向与主机LPV控制器在风浪干扰下联合控制的有效性.     

Investigation on full distribution CNC system based on SERCOS bus

A full distribution CNC system based on SERCOS bus is studied in accordance with the limitations of traditional PC-based motion card. The conventional PC-based motion control card is dispersed into several autonomous intelligent servo-control units with the function of servo driver. The autonomous intelligent servocontrol units realize the loop control of position, velocity and current. Interpolation computation is completed in PC and the computational results are transferred to every autonomous intelligent servo-control unit by high speed SERCOS bus. Software or hardware synchronization technology is used to ensure all servomotors are successive and synchronously running. The communication and synchronization technology of SERCOS are also researched and the autonomous intelligent servo-control card is developed byself. Finally, the experiment of circle contour process on a prototype system proves the feasibility.     

Non-fragile decentralized H∞ controller design for uncertain linear systems

Considering the design problem of non-fragile decentralized H∞ controller with gain variations, the dynamic feedback controller by measurement feedback for uncertain linear systems is constructed and studied. The parameter uncertainties are considered to be unknown but norm bounded. The design procedures are investigated in terms of positive definite solutions to modify algebraic Riccati inequalities. Using information exchange among local controllers, the designed non-fragile decentralized H∞ controllers guarantee that the uncertain closed-loop linear systems are stable and with H∞ -norm bound on disturbance attenuation. A sufficient condition that there are such non-fragile H∞ controllers is obtained by algebraic Riccati inequalities. The approaches to solve modified algebraic Riccati inequalities are carried out preliminarily. Finally, a numerical example to show the validity of the proposed approach is given.     

Analysis for gene networks based on logic relationships

The reverse construction and analysis of the networks of molecular interactions are essential for understanding their functions within cells. In this paper, a logic network model is constructed to investigate the complicated regulation mechanism of shoot genes of Arabidopsis Thaliana in response to stimuli. The dynamics of the complicated logic network is analyzed, discussed, and simulated. The simulation results show that the logic network of the active genes of shoot eventually evolves into eleven attractors under the stimuli, including five 1-periodic and six 2-periodic attractors. Our work provides valuable reference and guidance for biologists to understand and explain Arabidopsis’ response to external stimuli by experiments.