An experimental study of adaptive control for evolutionary algorithms

In this paper, we investigate how adaptive operator selection techniques are able to efficiently manage the balance between exploration and exploitation in an evolutionary algorithm, when solving combinatorial optimization problems. We introduce new high level reactive search strategies based on a generic algorithm's controller that is able to schedule the basic variation operators of the evolutionary algorithm, according to the observed state of the search. Our experiments on SAT instances show that reactive search strategies improve the performance of the solving algorithm.     

40kg试验焦炉的研制

文章介绍了40kg试验焦炉，分析和比较了试验焦炉与生产焦炉的差异，指出它们之间的模拟条件是炭化室宽度、煤料堆密度、炼焦速度和单向传热。     

Characterizing Performance Variation of Product Designs

Quality and reliability design practitioners have utilized Taguchi's methodology of matrix experimentation to generate computer simulation data for characterizing performance variation of product designs. However, the sampling strategy employed renders computer implementation of matrix experimentation cumbersome and statistically invalid. Weaknesses of this approach also include sample size limitation and overestimation of performance variation. An alternative approach that combines Monte Carlo simulation with the strategies of independent sampling across runs and correlated sampling between runs is presented. An application case study shows that the proposed approach constitutes an improvement on the matrix approach with respect to statistical validity and estimation accuracy.     

The replacement of animal testing: ethical issues and practical realities

Increasing expectation that products and materials of many kinds should be 'safe' is leading to demands for more toxicity testing. At the same time, there is mounting pressure to reduce, refine and replace laboratory animal experimentation. The testing of cosmetics is particularly controversial. The only way out of this dilemma is the development, validation, acceptance and use of non-animal test procedures, i.e. replacement alternative methods. Given realism and determination, more funding, better science and good strategic planning, the future for replacement alternatives, and thus for human and animal welfare, could be a very bright one.     

硼砂型膏剂渗硼剂的研制

使用硼砂作为渗硼膏剂的供硼剂，对7种活化剂的活化效果进行了研究，发现活化剂的类型和自身熔点的高低对活化效果有影响，氟化物活化效果好于氯化物，熔点高的活化剂活化效果较好，几种活化剂配合使用渗速明显高于单独使用一种活化剂的渗速，利用正交试验法，确定了CaF2,MgCl2和Na3AlF6三种活化剂的最佳配比，所研制的MSG膏剂渗速快，渗层质量好，对碳钢和低合金钢均有良好的渗硼能力。     

铍青铜形变时效工艺的优化

用正交试验的方法 ,对铍青铜形变时效工艺进行了优选。试验表明 ,控制冷变形度、时效温度和时效时间 ,可获得高的硬度 ,优化后的铍青铜形变时效工艺为 :37%冷变形 + 2 90℃× 2h。     

计算机网络实验的整合与实践

计算机网络实验是计算机网络课程教学中的一个重要环节,针对计算机网络实验课在教学中却存在种种问题,围绕实验教学目标,结合网络课程的特点,就计算机网络实验课的组织和管理、实验内容的设置提出了一些改革设想和实践方案。把多门网络类实验课程的实验项目进行了整合,构成了一门大的实验课程,提高了学生综合运用知识的能力。     

Solving the Beck and Wieland model with optimal experimentation in DualPC

Currently, there is a renewed interest in the use of optimal experimentation (adaptive control) in economics. Example are found in [Amman and Kendrick, 1999], [Amman and Kendrick, 2003], [Cosimano, in?press], [Cosimano and Gapen, 2005b], [Cosimano and Gapen, 2005a], [Cosimano and Gapen, 2006], [Tesfaselassie et?al., 2007], [Tucci, 1997], [Wieland, 2000a] and [Wieland, 2000b]. In this paper we present the Beck & Wieland model [Beck, G., & Wieland, V. (2002). Learning and control in a changing economic environment. Journal of Economic Dynamics and Control, 26, 1359-1378] and the methodology to solve this model with time-varying parameters using the various control methods described in [Kendrick, 1981] and [Kendrick, 2002]. Furthermore, we also provide numerical results using the DualPC software [Amman, H. M., & Kendrick, D. A. (1999). The DualI/DualPC software for optimal control models: User’s guide. Working paper, Austin, TX 78712, USA: Center for Applied Research in Economics, University of Texas] and show first evidence that optimal experimentation or Dual Control may produce better results than Expected Optimal Feedback.     

TangiWheel: A Widget for Manipulating Collections on Tabletop Displays Supporting Hybrid Input Modality

In this paper we present TangiWheel,a collection manipulation widget for tabletop displays.Our implementation is flexible,allowing either multi-touch or interaction,or even a hybrid scheme to better suit user choice and convenience.Different TangiWheel aspects and features are compared with other existing widgets for collection manipulation.The study reveals that TangiWheel is the first proposal to support a hybrid input modality with large resemblance levels between touch and tangible interaction styles.Several experiments were conducted to evaluate the techniques used in each input scheme for a better understanding of tangible surface interfaces in complex tasks performed by a single user (e.g.,involving a typical master-slave exploration pattern).The results show that tangibles perform significantly better than fingers,despite dealing with a greater number of interactions,in situations that require a large number of acquisitions and basic manipulation tasks such as establishing location and orientation.However,when users have to perform multiple exploration and selection operations that do not require previous basic manipulation tasks,for instance when collections are fixed in the interface layout,touch input is significantly better in terms of required time and number of actions.Finally,when a more elastic collection layout or more complex additional insertion or displacement operations are needed,the hybrid and tangible approaches clearly outperform finger-based interactions.     

提高焦炭热态性能的研究与应用

为提高焦炭热态性能，济钢焦化厂利用小焦炉试验和大工业焦炉试验，确定了主焦煤矿点及适应1750m^3大高炉用焦的配煤结构：1／3焦煤25％、肥煤25％、焦煤35％、瘦煤15％，与原生产配比相比，焦炭热态反应性平均降低4．6％，反应后强度平均提高4．3％．