基于遗传算法的多级有限能力生产计划

近年来很多学者研究了提前/拖期惩罚下的准时生产模型,但都局限于单件生产模式,关于多级装配情形的研究则很少,且均将加工能力视为常数.本文提出多级有限能力的准时化生产计划模型,并将加工能力视为变化的,最后采用遗传算法求解,计算结果证明了模型的有效性.     

城市的“光污染”问题及对策

随着我国现代化城市建设的不断发展,城市的“光污染”问题日益严重。文章指出“光污染”产生的原因及危害,并进一步分析玻璃幕墙和夜景照明所造成的“光污染”,提出了控制玻璃幕墙和夜景照明使用范围、优化幕墙构造设计、控制夜景照明照度等一系列改进措施,试图引起人们的重视,以求减少城市的“光污染”。     

大学校园设计发展的新趋向--青岛酒店管理职业技术学院设计

结合进行大学校园规划及建筑设计实践，论述了中国教育大发展背景下的校园规划理论及其建筑设计的发展趋势。     

基于势场栅格法的机器人全局路径规划

综合势场法和栅格法的优点，提出了一个新的全局路径规划方法——势场栅格法、算法在避免局部最优点和降低计算量方面，有着良好的效果；并且可以自动确定栅格粒度．最后，文章分析了影响算法精度的因素，仿真试验表明此算法有良好的可行性和有效性．     

生态城市与城市生态规划初探

通过分析与研究生态城市与生态规划的任务、原则、目标和方法，结合具体实际工程，在城市总体规划中引入了生态规划的内容，试图探索生态规划的有效途径，以期对黑龙江省的生态建设及城市可持续发展起到一定的促进作用。     

计算机辅助城市总体规划及其信息管理系统

计算机技术在城市规划领域的广泛应用，使传统落后的城市规划方法受到了新技术革命的冲击，有力地推动了城市规划理论与实践的深入和发展。该系统在对城市总体规划进行深入研究的基础上，对计算机辅助城市总体规划及其信息管理系统的建立进行了探讨。简要阐述了系统开发的目的、意义，介绍了系统的框架结构及各子系统的功能组成，并以黑尤江省安达市总体规划为例进行了系统的实际应用研究。     

Coordinated dispatching of proximity sensors for the surveillance of manoeuvring targets

The surveillance of a manoeuvring target with multiple sensors in a coordinated manner requires a method for selecting and positioning groups of sensors in real time. Herein, the principles of dispatching, as used for the effective operation of service vehicles, are considered. The object trajectory is first discretized into a number of demand instants (data acquisition times), to which groups of sensors are assigned, respectively. Heuristic rules are used to determine the composition of each sensor group by evaluating the potential contribution of each sensor. In the case of dynamic sensors, the position of each sensor with respect to the target is also specified. Our proposed approach aims to improve the quality of the surveillance data in three ways: (1) The assigned sensors are manoeuvred into “optimal” sensing positions, (2) the uncertainty of the measured data is mitigated through sensor fusion, and (3) the poses of the unassigned sensors are adjusted to ensure that the surveillance system can react to future object manoeuvres. If a priori target trajectory information is available, the system performance may be further improved by optimizing the initial pose of each sensor off-line. The advantages of dispatching dynamic sensors over similar static-sensor systems are demonstrated through comprehensive simulations.     

Evolutionary path planning for robot assisted part handling in sheet metal bending

While the bending sequence planning has been intensively studied, design of the motion path of a sheet metal part in the bending operation tends to be ignored by researchers. Because during the bending operation, the space for maneuvering a sheet metal part is very small, collisions between the part and bending tools are likely to occur. When a robot is used to handle the part, the role of an automatic path-planning tool becomes more significant. In this study, an evolutionary path-planning approach for robot-assisted handling of sheet metal parts in bending is firstly proposed and implemented. The proposed approach globally searches the motion path space to identify feasible paths. Collision detection algorithms based on segment intersection are used to check if the generated paths are feasible or infeasible. This method can automatically design feasible handling operations for a robot. Simulation examples on a simple “V” shaped part and a part with multiple bents demonstrate that the approach is efficient and practical.     

基于LDAP技术的企业基础信息平台构建

针对企业信息系统对信息共享、数据一致性和统一认证等需求，文中提出了基于LDAP技术构建企业基础信息平台的一种构想。并对基础信息平台构建模式、信息组织方式、开发环境的建立以及客户端程序设计等问题进行了深入探讨并给出了相应的解决方案。     

Selection of Strategies for Collision-free Motion in Multi-manipulator Systems

Strategy-based path planning was introduced by the authors as a way to give robotic manipulators some sort of reactive behaviour in dynamic and unpredictable environments. This approach is based on making robots react to moving obstacles using a restricted subset of the configuration space, and on using an off-line pre-planning stage to choose the restricted subset. In this paper, strategy-based path planning is applied and explored, focusing our attention on the off-line stage. It is applied to the joint motion of two and three robots that perform pick and place tasks sharing common working areas.