全文获取类型
收费全文 | 24594篇 |
免费 | 1013篇 |
国内免费 | 11篇 |
专业分类
25618篇 |
出版年
2021年 | 220篇 |
2020年 | 301篇 |
2019年 | 340篇 |
2018年 | 532篇 |
2017年 | 548篇 |
2016年 | 549篇 |
2015年 | 392篇 |
2014年 | 450篇 |
2013年 | 2112篇 |
2012年 | 833篇 |
2011年 | 852篇 |
2010年 | 521篇 |
2009年 | 437篇 |
2008年 | 680篇 |
2007年 | 690篇 |
2006年 | 583篇 |
2005年 | 510篇 |
2004年 | 477篇 |
2003年 | 469篇 |
2002年 | 477篇 |
2001年 | 768篇 |
2000年 | 744篇 |
1999年 | 556篇 |
1998年 | 232篇 |
1996年 | 226篇 |
1992年 | 454篇 |
1991年 | 454篇 |
1990年 | 432篇 |
1989年 | 410篇 |
1988年 | 427篇 |
1987年 | 383篇 |
1986年 | 395篇 |
1985年 | 397篇 |
1984年 | 311篇 |
1983年 | 276篇 |
1982年 | 207篇 |
1981年 | 210篇 |
1979年 | 353篇 |
1978年 | 254篇 |
1977年 | 215篇 |
1975年 | 281篇 |
1974年 | 356篇 |
1973年 | 367篇 |
1972年 | 292篇 |
1971年 | 288篇 |
1970年 | 282篇 |
1969年 | 254篇 |
1968年 | 356篇 |
1967年 | 309篇 |
1966年 | 291篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
971.
Survey results supported Locke's (1969, 1976) contention that facet job satisfaction is a function of three basic determinants: 1) facet amount; 2) wanted amount; and 3) facet importance. We found several three-way interactions that were generally consistent with Locke's model. Specifically, facet satisfaction was highest when employees wanted a large amount of the facet in question, were currently receiving a large amount, and felt that the facet was personally important. Conversely, satisfaction was lowest when employees wanted a large amount of the facet, were currently receiving only a small amount, and felt that the facet was personally important. When job facets were viewed as unimportant to employees, however, the amount of facet desired and currently possessed had little impact on satisfaction. Implications, limitations, and directions for research are discussed.Bob Rice passed away recently. He will be sorely missed. 相似文献
972.
973.
L. Hejdánek 《Studies in East European Thought》1991,42(3):253-258
Official Czech philosophy has been dominated by a mix of Engelsian philosophy of science and positivism, a combination explained in part by the survival of positivism in Czechoslovakia and the failure of analytic philosophy to make inroads into Czech thinking. However, due to Jan Patoka's influence in espousing the works of Husserl and Heidegger, there was an anthropologically oriented Marxism (K. Kosik) although its successes were greater abroad than in Czechoslovakia. A more neopositivistic variant (L. Tondl) of Marxism also appeared, but it was a short-lived phenomenon without purchase on mainstream philosophy.A certain renewal of Czech philosophy was evident before 1968, once again largely due to Patoka's influence. Foreign guests who took part in informally organized, often secret, seminars and discussion groups were very instrumental in spreading new ideas. Despite these positive occurrences, Czech philosophy is experiencing a crisis at the level of the middle generation of non-academic, philosophically competent intellectuals among whom sceptical and nihilist attitudes prevail. A rebirth of spirit may be in the offing if the recovery of the specific sense of the Czech Reformation's idea of truth is pursued. 相似文献
974.
H J Eysenck R Grossarth-Maticek B Everitt 《Integrative Physiological and Behavioral Science》1991,26(4):309-322
Risk factors for cancer have been found in the past to act synergistically in a number of studies. However, these studies were not always designed to test the hypothesis of synergism, and have sometimes failed to equate for important variables, which might influence the results. The present study tests the hypothesis that psychosocial variables and physical ones (personality/stress, smoking, and genetic predisposition) interact in a synergistic fashion in the causation of lung cancer and coronary heart disease (CHD). 相似文献
975.
Despite increased recognition of the importance of providing routine choice opportunities for persons with severe handicaps, this population continues to experience a typical lack of such opportunities. We evaluated a program for increasing the amount of choices made during routine mealtimes by persons with profound mental retardation and minimal communication skills. The choice provision program, involving systematic presentation of alternative food and drink items in a step-wise fashion during the course of the meal, was implemented with three persons in a residential facility. Results indicated that after implementation of the choice program, all three participants made consistently more choices concerning the foods and beverages they consumed relative to baseline. The choice provision program was conducted without extending the amount of time typically allotted to mealtime within the residential setting. Results are discussed in regard to additional research needed to continue developing means of assisting persons with profound mental retardation to exert control over meaningful events in their lives. 相似文献
976.
Dr. Fabricio E. Balcazar Ph.D. Richard Majors Ph.D. Katherine A. Blanchard M.A. Adrienne Paine M.A. Yolanda Suarez-Balcazar Ph.D. Stephen B. Fawcett Ph.D. Ray Murphy M.A. Jim Meyer B.A. 《Journal of Behavioral Education》1991,1(4):445-454
Recruiting help from mentors and other potential helpers is a promising strategy for helping disadvantaged and minority youths meet their personal and educational goals. Three African-American high school seniors participated in a project designed to evaluate the effectiveness of training procedures that would allow them to ask for help in attaining educational and other personal goals. A behavioral training procedure that included instructional materials, role-play practice, praise, and feedback was used. Targeted skills included goal setting and 30 responses involved in the process of meeting with a potential helper. Role-play situations were used to evaluate participants' help-recruiting skills before and after training. Participants increased their help-recruiting skills from an average of 38% during baseline, to an average of 75% after training. Self-reported measures of goal attainment suggested that the students benefited from the training. Implications for mentoring programs designed to increase minority students' opportunities to reach educational goals were discussed. 相似文献
977.
A high-resolution clock is often indispensable for the accurate measurement of millisecond or microsecond resolution intervals, and it is impossible to measure the probability distribution of short intervals without one. This paper describes a microsecond clock for Sun 3 and 4 workstations that we designed, built, and have made publicly available. It also explains how to measure intervals shorter than a computer’s clock resolution, and derives confidence intervals for such measurements. 相似文献
978.
H. J. Eysenck R. Grossarth-Maticek B. Everitt 《Integrative psychological & behavioral science》1991,26(4):309-322
Risk factors for cancer have been found in the past to act synergistically in a number of studies. However, these studies were not always designed to test the hypothesis of synergism, and have sometimes failed to equate for important variables, which might influence the results. The present study tests the hypothesis that psychosocial variables and physical ones (personality/stress, smoking, and genetic predisposition) interact in a synergistic fashion in the causation of lung cancer and coronary heart disease (CHD). 相似文献
979.
Marek Franěk Jiří Mates Tomáš Radil Karin Beck Ernst Pöppel 《Attention, perception & psychophysics》1991,49(6):509-516
Subjects (N = 32) were asked to synchronize a motor response with tones in auditory patterns. These patterns were created from six tones and six intertone intervals of equal duration. The pitch of the first tone differed from the others. It was found that subjects used three types of timing in their motor response: (1) the first intertone interval was prolonged and the second interval was shortened, (2) the second intertone interval was prolonged and the first interval was shortened, and/or (3) the first interval and the second interval were of approximately the same length. The prolongation of the fifth interval was observed during all three types of timing. The results are explained using the concept of suprasegmental control of timing, which explains a prolongation of intervals at critical control point of the patterns. The occurrence of three different strategies of timing is discussed in connection with similar principles in musical performance. 相似文献
980.
Recent reports of failure to obtain blocking in human galvanic skin response (GSR) conditioning, together with our own equivocal results with eyelid conditioning, have motivated us to re-examine the status of the conditioned stimulus (CS) in human conditioning studies. The issues raised by compound stimuli, by contextual cues and occasion setting stimuli, and by cross-modal transfer are considered in the light of data from our laboratories. These data include observations on the interchangeability of stimulus modalities during acquisition, the use of varying information loads embedded in occasion setting displays, the comparison of alternative blocking designs and the analysis of response topography in relation to stimulus variability. They suggested that an adequate account of the CS in human conditioning studies must recognize that it is dynamically processed and reprocessed both during and after acquisition. 相似文献