全电流与故障分量电流比例差动判据的比较研究

全面对比分析了全电流比例差动判据和故障分量电流比例差动判据的灵敏性和安全性。确认了故障分量电流差动判据在灵敏性上优于全电流差动判据，并指出全电流判据在某些特殊工况下如系统振荡中发生故障时可能存在长延时的拒动。当外部故障较大，穿越电流造成CT饱和时，故障分量电流差动判据的安全性也优于全电流差动判据。     

Stress Dilatancy and Fabric Dependencies on Sand Behavior

A stress dilatancy model with embedded microstructural information, originally developed by the writers, is used to illustrate the pivotal importance of dilatancy and fabric on the behavior of sand. Fabric, as a second-order tensor, enters into the stress dilatancy equation obtained from a microscopic analysis of an ensemble of rigid particles. Model simulations of sand behavior are carried out in triaxial stress conditions along strain paths with varying degrees of controlled dilation (or compaction) including isochoric deformations as a particular case. Under particular strain paths and fabric conditions, it is shown that a relatively dense sand can succumb to instability or liquefaction under other than isochoric (undrained) conditions. This phenomenon is in accord with laboratory experiments in which dilation or compaction is controlled by modulating the amount of water flowing in or out of a sand specimen during shearing. Mixed drained–undrained loading paths are also simulated with particular reference to fabric dependence at a fixed void ratio. Model simulations capture most of the observed characteristics of sand response, such as instability and asymptotic behavior under various conditions.     

Concordance in Attachment States of Mind and Styles With Respect to Fathers and Mothers.

It is believed that by adulthood, independent attachments to the mother and the father coalesce into a single state of mind with respect to attachment. If true, states of mind with respect to mothers and fathers should be concordant. Fifty-six young adults were administered two versions of the Adult Attachment Interview, each of which asked about their relationship with one parent. State of mind with respect to the father was significantly related to state of mind with respect to the mother, as were attachment styles regarding the two parents. Perceptions of attachment styles were not very related to corresponding states of mind but were related to inferred loving from a parent. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Psychological Perspectives on Hate Crime Laws.

Hate crimes are those in which the victim is selected because of his or her actual or perceived race, color, religion, disability, sexual orientation, or national origin. Hate crime laws have frequently been met with objections. Whereas some objections are based in constitutional law, other objections invoke a variety of psychological constructs, including attitude, motivation, behavior, emotion, and intergroup relations. These objections can be illuminated by relevant psychological theory and research. Topics addressed include the measurement of motivation and intent, and distinctions among attitudes, emotions, and behavior. Hate crimes and other crimes are compared in terms of perpetrators, type and degree of violence, psychological and physical trauma suffered by victims, and community impact. Psychologically based defense strategies used by perpetrators of hate crimes are critiqued. Hate crime laws are also discussed in terms of the political and social values they reflect. Finally, research and policy implications are outlined, including implications for prevention and intervention at the individual, community, and law enforcement levels. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Category Learning in Rhesus Monkeys: A Study of the Shepard, Hovland, and Jenkins (1961) Tasks.

In influential research, R. N. Shepard, C. I. Hovland, and H. M. Jenkins (1961) surveyed humans' categorization abilities using tasks based in rules, exclusive-or (XOR) relations, and exemplar memorization. Humans' performance was poorly predicted by cue-conditioning or stimulus-generalization theories, causing Shepard et al. to describe it in terms of hypothesis selection and rule application that were possibly supported by verbal mediation. The authors of the current article surveyed monkeys' categorization abilities similarly. Monkeys, like humans, found category tasks with a single relevant dimension the easiest and perceptually chaotic tasks requiring exemplar memorization the most difficult. Monkeys, unlike humans, found tasks based in XOR relations very difficult. The authors discuss the character and basis of the species difference in categorization and consider whether monkeys are the generalization-based cognitive system that humans are not. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A study on fault diagnosis and maintenance of CNC-WEDM based on binary relational analysis and expert system

The paper presents a binary relational analysis and expert system base module for maintenance and fault diagnosis of CNC wire EDM. The module proposes a framework of integrated maintenance and fault diagnosis system. The study explores the binary coded matrix system, which plays an important role in prediction and diagnosis of wire electrical discharge machining (WEDM) faults on the spot by expert guidance. In this study, 15 inputs were considered to observe eight probable causes with the help of the forward and backward propagation algorithms. Inputs and output matrices were considered in the form of a square matrix. To explain the fault diagnosis and to realize the importance of maintenance through advice, the detection of faults is investigated through forward and back propagation of matrix transformation on the spot. It is an integrated backup that can be individually focused when input and output parameter do not match. It is a time saving, knowledge acquisition, easy to maintain, and capable of self-learning system. To verify the developed framework, 120 data sets were generated for proper analyzing of acquired output through graphical representation. The paper also presents some of the important features of maintenance schedule and probable causes of wire breakage with remedial actions in tabular form. The developed system can help the operators, trainees, and manufacturing engineers in achieving trouble free machining through quick detection of faults and proper maintenance of machines in actual practice.     

精纺毛织物规格参数对其热湿性能影响的研究

对薄型精纺毛织物进行透气性、透湿性、吸湿性、吸湿膨胀率及导热性测试,研究不同织物成分、织物组织、单位面积质量、总紧度、体积分数等对毛织物面料热湿性能的影响。结果表明,织物规格参数与热湿性能密切相关。总紧度与单位面积质量对透气性影响相对显著,变化趋势近似于指数函数方程;单位面积质量、总紧度及组织对透湿性影响相对显著,影响因素较透气性复杂;体积分数及纤维成分对导热性影响相对显著;吸湿膨胀率和吸湿性主要与纤维成分有关,且吸湿膨胀率与吸湿性相关系数可达0. 90。     

Does internet dependence affect young people's psycho-social status? Intrafamilial and social relations,impulse control,coping ability and body image

The purpose of this study was to investigate the relation between internet dependence in university students in late adolescence and self-image. The research group consisted of first year university students studying in various departments of the Karadeniz Technical University Fatih Faculty of Education. The study was performed with 623 students, 454 female and 169 male. The Internet Dependence Questionnaire, the Offer Self-Image Questionnaire and a Personal Data Form were used for data collection. Pearson product moment coefficient and multiple linear regression analysis results showed that students' internet dependence was significantly negatively correlated with the self-image subdimensions intrafamilial and social relations, impulse control, coping ability and body image. Multiple linear regression analysis showed that the self-image subdimensions of intrafamilial and social relations and impulse control subdimensions significantly predict internet dependence.     

An application of OWA operators in fuzzy business diagnosis

The paper aims to develop an adjustment index based on OWA operators to enrich the results of diagnostic fuzzy models of business failure. A proposal to verify the diseases prediction accuracy of the models is also added. This allows a reduction of the map of causes or diseases detected in strategic defined areas. At the same time, these key areas can be disaggregated when an alert indicator is identified, and shows which of the causes need special attention. This application of OWA can encourage the development of suitable computer systems for monitoring companies’ problems, warn of failures and facilitate decision-making. In addition, taking Vigier and Terceño’s 2008 model as a benchmark, causes aggregation operators are introduced to evaluate alternative groupings, and the adjustment measure using approximate solutions is proposed to test the model’s prediction.The empirical estimation and the verification of the improvement proposals in a set of small and medium- sized enterprises (SMEs) in the construction industry are also presented. The functionality and the prediction capacity are thus measured and detected by monitoring key areas that warn about insolvency situations in the firm.