Information synthesis based on hierarchical maximum entropy discretization

Abstract

This paper outlines a new approach to the synthesis of information from data. Information is defined as a detected organization of data after a process of discretization (or partitioning) and event covering. The discretization is based on a hierarchical maximum entropy scheme which iteratively minimizes the loss of information according to Shannon. The event-covering process is based on an evaluation of the deviation of the observed frequencies of an event from the expectation due to prior knowledge (defined by the null hypothesis and/or domain knowledge). The hierarchical maximum entropy discretization scheme provides a rigorous and efficient way in solving the non-uniform scaling problem in multivariate data analysis. Because our method refines the boundaries dynamically depending on the detection of information, it directs the analysis on the outcome subspace with high information content. In addition, it naturally produces a hierarchical view of information so that data can be analyzed/synthesized with respect to an outcome context. The method has been tested using simulated and real life data with very good result.     

Development of Advanced Cement-Based Building Products

In this study, short fiber-reinforced cement-based building products of sheets, pipes and honeycomb panels incorporating various mineral admixtures such as slag, silica fume, and metakaolin have been developed by the extrusion technique. The experimental works have shown that these products do have very good mechanical properties. Since the key point for a successful extrusion is the properly designed rheology which controls both internal and external flow properties of ext rudate, a nonlinear viscoelastic model was applied to investigate the rheology behavior of a movable fresh cementitious composite in a single screw extruder channel. The theoretical analysis is used to guide the practical manufacturing.     

Thickness dependence of refractive index for anodic aluminium oxide films

Abstracts are not published in this journal     

蔬菜汤粉的研制

介绍了蔬菜汤粉的形成、加工工艺、产品特点、调味机理、技术要求,从而为方便食品及调味品提供了一种全新的调味配料.     

等通道角挤压制备细晶ZK60镁合金的组织与力学性能

利用两种等通道角挤压(ECAP)方法(普通单步ECAP和两步ECAP)制备细晶ZK60合金。采用金相显微镜、扫描电镜、透射电镜和X射线衍射仪对合金的组织和织构进行观察,通过拉伸试验研究不同ECAP方法对合金力学性能的影响。结果表明:与单步ECAP变形相比,两步ECAP变形,由于降低了变形温度,晶粒细化效果更好;经过(240℃,4道次)+(180℃,4道次)两步ECAP变形后,合金晶粒细化至约0.8μm;合金的力学性能与材料的织构密切相关,由于存在织构软化效应,与挤压态相比,经单步ECAP变形后合金的强度有所降低,而伸长率明显提高;但经两步ECAP变形后,由于细晶强化和亚结构强化的作用,合金的强度得到提高。     

A learning-based methodology for dynamic scheduling in distributed manufacturing systems

To enhance productivity in a distributed manufacturing system under hierarchical control, we develop a framework of dynamic scheduling scheme that explores routeing flexibility and handles uncertainties. We propose a learning-based methodology to extract scheduling knowledge for dispatching parts to machines. The proposed methodology includes three modules: discrete-event simulation, instance generation, and incremental induction. First, a sophisticated simulation module is developed to implement a dynamic scheduling scheme, to generate training examples, and to evaluate the methodology. Second, the search for training examples (good schedules) is successfully fulfilled by the genetic algorithm. Finally, we propose a tolerance-based learning algorithm that does not only acquire general scheduling rules from the training examples, but also adapts to any newly observed examples and thus facilitates knowledge modification. The experimental results show that the dynamic scheduling scheme significantly outperforms the static scheduling scheme with a single dispatching rule in a distributed manufacturing system.     

单元化柔性制造系统集成开发的模块化方法

提出一套用于单元化柔性制造系统（CFMS）开发的结构化方法。主要强调和突出了建筑块（Building Block)概念以及集成开发与控制环境。建筑块是一种迷你型自治单元,它可以执行规划功能、计划执行和执行监控。在开发建筑块的过程中,用到了面向对象的软件工程方法论。基于这种方法论,通过一个集成CFMS开发与运作环境,一系列的FMS（CFMS）可由事先定义好的软件建筑块类库中产生。     

间歇生产过程的R调节学习控制

针对间歇生产过程迭代学习控制难以进行跟踪性能分析的难题,本文提出一种变R调节迭代学习控制算法,借鉴经典控制理论定义有界跟踪和零跟踪概念.以此研究能够让系统输出误差达到零跟踪的迭代学习控制策略,并严格地证明了算法的性能,得出可以通过调节权值R使过程产品质量的误差收敛到与模型精度相关联的有界区域的结论,为相关理论结果实施于实际间歇过程提供了理论依据.     

西班牙卡蒙纳的巴特勒酒窟——一个与乡土相关的生物气候学建筑

自20世纪90年代始,欧洲大陆的葡萄种植进入了结构调整期。卡蒙纳,一个西班牙的家庭式酒酿造企业,在这个倾向下迁离市中心的陈旧结构,修建了一座新的建筑体。在2001年第一期工程期间,建筑师达到了能量消耗减低和工作空间最优化的指标。在2008年的第二期工程规划期间,景观设计师苏阿茜·丹尔娞(SoazigDarnay)对游人接待的逻辑和整座酒窟建筑及其生产活动与周边环境之融为一体进行了思考。项目建立在酒窟、田野和临近的山川和谐的概念上。