Specification methods for material-handling control algorithms in flexible manufacturing systems

Good methods are needed to specify, test, and debug material-handling control logic. This article surveys a number of representative methods for defining and describing control algorithms for programmable material-handling equipment used in flexible manufacturing systems. The methods are evaluated with regard to their suitability for communication between people and as bases for interfaces to automatic program generators. It is concluded that no single method is entirely satisfactory. Three methods (position diagrams, function block diagrams, and operation networks) have potential to be combined into an effective hybrid approach that minimizes the need for the user to switch between various conceptual models.     

一次盐水设备运行总结

介绍了内蒙古海吉氯碱化工股份有限公司6万t/a离子膜烧碱装置一次盐水设备的运行情况和运行过程中存在的问题及相应的技改措施.     

直立炉运行保养实践

叙述了直立炉运行情况，对炉子耐火砖部分的损坏原因进行了分析，对炉子保养的具体措施作了介绍。     

Learning to Perceive and Act by Trial and Error

This article considers adaptive control architectures that integrate active sensory-motor systems with decision systems based on reinforcement learning. One unavoidable consequence of active perception is that the agent's internal representation often confounds external world states. We call this phoenomenon perceptual aliasingand show that it destabilizes existing reinforcement learning algorithms with respect to the optimal decision policy. We then describe a new decision system that overcomes these difficulties for a restricted class of decision problems. The system incorporates a perceptual subcycle within the overall decision cycle and uses a modified learning algorithm to suppress the effects of perceptual aliasing. The result is a control architecture that learns not only how to solve a task but also where to focus its visual attention in order to collect necessary sensory information.     

二滩水电站油、水、风系统设备运行与改造

水电站辅助设备的运行直接影响水电站运行的安全性和可靠性。二滩水电站投运初期，油、水、风系统先后出现了许多问题，通过应用新产品和新技术对其进行了改造。为水电厂辅助设备的设计、选型、安装提供了宝贵的经验，并对水电厂辅助设备的检修、调试和运行维护有一定的指导作用。     

Topology preservation of template-based 6-subiteration reduction operations

Generally, a reduction operation (e.g., thinning and shrinking) on 3D binary images can be represented as a set of reduction templates where every object voxel of the image satisfying any template is turned to a background voxel. Generally, it is rather difficult, error-prone and time-consuming for verifying the topological soundness of a 3D parallel reduction operation. This paper proposes sufficient conditions of time complexity O(n) for verifying the topological soundness of 3D parallel 6-subiteration reduction operations of n templates where such a kind of 3D reduction operations is performed alternatively from the six orthogonal directions to turn object voxels to background voxels. By such sufficient conditions, the topology soundness of a 3D 6-subiteration parallel reduction operation can be verified by checking each and every of its templates.     

HACCP体系用于给水处理厂浊度控制的研究

介绍了危害分析和关键控制点（HACCP）体系的基本原理及其在城市给水系统中的应用进展，并以我国南方某城市的给水处理厂为例，对HACCP体系用于水厂浊度控制开展了探索性研究。应用故障树分析技术识别了水厂中可能导致浊度超标的潜在危害，应用决策树分析技术确定了水厂浊度控制的关键控制点，建立了关键控制点和质量控制点的关键限值、监控系统以及纠偏措施，并分析了对验证程序以及文件和记录保存系统的要求。     

圆盘锯机性能提升途径

圆盘锯机在线材厂投入使用时不能满足生产的需要：锯切周期太长，锯片使用性能差，经过对设备进行技术改造和对设备操作规程进行优化，以及在操作上加强管理，使之关键指标大幅度提升，为圆盘锯机的使用改善提供了新的思路。     

Controlled linear system with delayed relay output under impulse random disturbances

The paper is devoted to the first order delayed linear system with relay output controlled by the proportional-integral (PI) regulator. The deterministic system exhibits stable oscillations, and, since the system itself is stable, it can be suitable to switch off the controller if there are no disturbances during a long time interval. In the present work, the random disturbances are modelled by a Poisson stream of impulses, and the goal is to determine the instants of switching on (off) of the PI controller. After several assumptions and quantization of the time axis, we construct the new optimal control problem which is successfully solved with the help of the dynamic programming approach.     

Age Differences in Everyday Problem-Solving and Decision-Making Effectiveness: A Meta-Analytic Review.

The authors report a meta-analysis of age differences in everyday problem-solving/decision-making effectiveness (EPSE). Effect sizes were calculated to reflect 3 age group comparisons: old versus young, young versus middle-aged, and middle-aged versus old. Findings from the meta-analysis of 28 separate studies with an aggregate of 4,482 participants do not support theories of preserved EPSE in late adulthood. Although significant age differences of moderate magnitude persisted across methodological and theoretical domains, rating criteria (experimenter vs. participant) emerged as a significant moderator of the effect magnitude and direction. In addition, EPSE in older adults was bolstered when problem content was interpersonal and when samples were highly educated. Finally, the current results support the conceptual integration of findings from the everyday problem-solving and everyday decision-making literatures. (PsycINFO Database Record (c) 2010 APA, all rights reserved)