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The main purpose of this study is to evaluate the computational efficiency of algorithms for calculating shortest paths when they are correctly coded by using the C programming language. The eight algorithms that we selected for this experiment are the most efficient, either measured in terms of worst-case bounds or marked as such from previous computational studies; they include the redistributive heap algorithm. We suggest computer implementations that use the full power of C. In particular, the network representation and the various data structures used to keep the scan eligible list may be managed by using only additions and no multiplications, while it is not possible with FORTRAN. These capabilities, unique to C, yield several interesting conclusions: one may expect to speed up a shortest path algorithm by a factor of 20%; in some cases, this factor may reach 30%. Interestingly, the level of programming difficulty required to achieve these benefits is not greater than that required by implementations using arrays. 相似文献
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Mice Fed a High‐Cholesterol Diet Supplemented with Quercetin‐3‐Glucoside Show Attenuated Hyperlipidemia and Hyperinsulinemia Associated with Differential Regulation of PCSK9 and LDLR in their Liver and Pancreas 下载免费PDF全文
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Studied determinants of psychological stress in the workplace to test a 2-step model involving 3 organizational stressors (i.e., quantitative work overload, role conflict, and role ambiguity) and 3 types of resources (i.e., individual, interpersonal, and organizational). 636 full-time employees (mean age 37.5 yrs) of 4 organizations completed questionnaires assessing sociodemographic factors, organizational stressors, resources (i.e., locus of control, Type A (coronary prone) behavior, social support from supervisors and colleagues, and decisional latitude), and psychological stress. Interactions among these factors were determined via multiple regression analyses. Several French-language instruments were used, including the Questionnaire on Internal–External Locus of Control in the Workplace (N. Pettersen, 1984) and the Psychiatric Symptom Index (F. W. Ilfeld, 1976). (English abstract) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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Evaluated the effect of relative deprivation on behalf of others (RDBO), social identification (IDEN), and intergroup differentiation (DIFF) on attitudes of men and their behavioral intentions concerning affirmative action strategies on behalf of women. The variables were integrated in a predictive model that was tested using path analysis. 122 male university students (aged 17–36 yrs) participated by responding to a questionnaire pertaining to IDEN, DIFF, RDBO, and intentions. Intentions to affirmative action strategies were influenced by social identity and RDBO. RDBO acted as a mediating variable between intergroup differentiation and intentions to implement affirmative action strategies. Results show that affirmative action can be positively received by males. (French abstract) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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Sociogenèse et psychobiologie: Les sources de la continuité et de la discontinuité du développement.
Sinclair Francine; Strayer F. Francis; Winegar Lucien T. 《Canadian Metallurgical Quarterly》2003,44(3):267
The aim of this article is to reflect conceptually upon the various stakes in development from both psychobiological and sociogenetical perspectives, two prominent contemporary theories of social sciences. Where does developmental continuity belong?...Does it belong within the individual or within his or her environment? Despite explicitly recognizing the influence of social experience in human development, the traditionally old nature-nurture debate remains at the center of theoretical analyses and leads to a futile integration of the two positions. The authors propose a theoretical model, which suggests not to integrate these two antagonistic positions but rather to recognize and utilize their interdependency as a means of viewing continuity and discontinuity as complementary facets of development. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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Ladouceur Robert; Ferland Francine; Poulin Christiane; Vitaro Frank; Wiebe Jamie 《Canadian Metallurgical Quarterly》2005,19(3):271
This study assessed the possible differences in the classification of adolescent gamblers when using the South Oaks Gambling Screen-Revised for Adolescents (SOGS-RA; K. C. Winters, R. D. Stinchfield, & J. Fulkerson, 1993) versus a clinical interview that was based on Diagnostic and Statistical Manual of Mental Disorders (DSM-IV; American Psychiatric Association, 1994) criteria for pathological gambling. A total of 631 adolescents ages 15-17 years participated in the two phases of the study. Results revealed that of the 93 adolescents who had been screened as problem gamblers according to the SOGS-RA, only 7 could be clinically confirmed as pathological gamblers according to the criteria used at present to define pathological gambling. The need to clarify the construct of pathological gambling among youth is discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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Cyr Francine; King Michael C.; Ritchie Pierre L.-J. 《Canadian Metallurgical Quarterly》1995,36(3):201
Describes a model of quality management, designed by a task force of the Canadian Psychological Association, to meet revised standards of the Canadian Council on Health Facilities Accreditation for psychology services. The incorporation of aspects of Continuous Quality Improvement, Total Quality Management, Indicators, and Benchmarking are discussed in relation to their application to psychology services in health care facilities. The Quality Management Model is based on the assumptions that everyone wants to do their job well and improve in their job performance; that the improvement in the quality of services is everyone's responsibility; and that psychological service provision in a health care facility involves complex linkages between providers, suppliers, and customers. The model also assumes that the major problems affecting quality of service are usually those same linkages, or the customers themselves; and that identifying and monitoring these linkages is crucial to understanding how to improve quality. (French abstract) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献