Supervised hybrid feature selection based on PSO and rough sets for medical diagnosis

Medical datasets are often classified by a large number of disease measurements and a relatively small number of patient records. All these measurements (features) are not important or irrelevant/noisy. These features may be especially harmful in the case of relatively small training sets, where this irrelevancy and redundancy is harder to evaluate. On the other hand, this extreme number of features carries the problem of memory usage in order to represent the dataset. Feature Selection (FS) is a solution that involves finding a subset of prominent features to improve predictive accuracy and to remove the redundant features. Thus, the learning model receives a concise structure without forfeiting the predictive accuracy built by using only the selected prominent features. Therefore, nowadays, FS is an essential part of knowledge discovery. In this study, new supervised feature selection methods based on hybridization of Particle Swarm Optimization (PSO), PSO based Relative Reduct (PSO-RR) and PSO based Quick Reduct (PSO-QR) are presented for the diseases diagnosis. The experimental result on several standard medical datasets proves the efficiency of the proposed technique as well as enhancements over the existing feature selection techniques.     

江汉油田注入水杀菌剂的筛选与应用

油田注入水中硫酸盐还原菌、铁细菌、腐生菌是危害最大的细菌,这三种细菌特性各异,相互之间还存在一定的联系。杀菌剂的选用应保证对这三种细菌有较好的杀灭作用,并辅以正确的投加方法。     

A Mössbauer effect investigation of site preferences and Fe environments in Ga-substituted Sm2Fe17 compounds

Room temperature ⁵⁷Fe Mössbauer studies of the 2:17 compounds Sm₂Fe_17−xGa_x with x=0, 1, 2, 3, 4 and 5 are reported. These measurements yield values of the Fe hyperfine field and relative concentration of Fe atoms at the four inequivalent transition metal sites, 6c, 9d, 18f and 18h, in the rhombohedral Th₂Zn₁₇ structure. Changes in the Fe hyperfine field as a function of Ga content can be correlated to changes in lattice parameter and Curie temperature and are the result of changes in the transition metal-transition metal exchange coupling. The relative intensity of the various spectra components shows that for small concentrations, Ga preferentially enters into the 18h sites. For x & 1 a substantial quantity of Ga also enters into the 18f sites. It is the Ga which enters into the 18f sites which is responsible for the formation of a uniaxial anisotropy in these materials for higher Ga content.     

CIMS环境下刀具状态监测研究回顾与展望

敏感信号的选择和信号处理技术是刀具切削状态在线监测系统设计的两个关键要素，本文试从这两方面对刀具切削监测系统的研究作了回顾与分析，并对未来的研究趋势作了展望。     

环氧氯丙烷装置盐酸吸收塔的选材与应用

针对环氧氯丙烷装置盐酸吸收塔的腐蚀状况，分析了该塔原材质的局限性，通过对三种材料的现场挂片试验和技术经济分析，选择好Derakane470-300树脂并以该树脂为主材制作了盐酸吸收塔，应用效果良好。     

Error performance of hybrid wireless-power line communication system

This paper considers a hybrid wireless-power line communication system for smart meter and grid interaction. The performance of the considered system is evaluated for different switching schemes such as threshold based switching, random switching, and selection combining. The power line channel is characterized using the log-normal random variable, whereas the channel response for the wireless link is modeled as the Nakagami-m distributed random variable. The expressions for average bit-error-rate (BER) for the considered switching/combining schemes are obtained, and the average BER performances of all the considered combining schemes are compared. The results are verified through simulations.     

Materials’ tactile testing and characterisation for consumer products’ affective packaging design

Touch is one sense through which people judge consumer products. How materials’ properties influence these judgments is the topic of this paper. People’s sensorial or psycho-physical judgments (by touch) of the roughness, softness, slipperiness and warmth of 37 material samples are reported as well as their affective judgments, such as how pleasurable, exciting, indulgent, the samples felt. Physical measurements are also reported of the samples’ coarse and fine surface finishes, compliance, sliding friction and thermal contact properties. Relationships between the affective and sensorial judgments and the physical measurements are explored. A relational hierarchy is established from the physical measurements to the sensorial to the affective judgements. By following the dependencies in reverse, from the affective to the sensorial to the physical level, the required material surface properties to transmit intended affective messages to consumers might be determined. However, further work is needed on how to quantify some aspects of surface properties, particularly of roughness and sliding friction, in a manner useful for relating to affect. The methods described currently support communication and decision taking during the product development process.     

Searching Markush formulae directed to medical applications

Markush formulae are beyond any doubt the most efficient way of claiming a generic group of compounds. Indeed they are necessary to give applicants adequate protection for their invention. However, due to their complex nature, it is not always straightforward to determine their exact scope.The present paper looks at two extremes of Markush structures, which are unsearchable as such, the so-called “A-B-C type molecules” and “too simple compounds”. Appropriate patentability search strategies, including non-unity and incomplete searches, are defined.Frequently, claimed Markush formulae partially overlap with prior art generic structures. Criteria for selecting the most relevant documents in such cases are discussed, including novelty and inventive step aspects of selection inventions. In a case study, the use of different search tools is compared.     

中央空调工程主机房设计剖析

本文霜酒店中央空调工程主机选择作出技术经济对比，并采用同样方法对多个工程进行测算，得出中央空调工程主机房设计基本思路及方法。     

科技园研发中心设计初探

在分析研发行为特征的基础上,从建筑设计层面探讨了科技园研发中心设计的几个方面,指出如何用物质的手段来营造非物质创新网络秩序是摆在建筑师面前的主要命题之一。