全文获取类型
收费全文 | 26313篇 |
免费 | 449篇 |
国内免费 | 1篇 |
专业分类
管理学 | 3462篇 |
民族学 | 122篇 |
人才学 | 4篇 |
人口学 | 2595篇 |
丛书文集 | 128篇 |
教育普及 | 2篇 |
理论方法论 | 2306篇 |
现状及发展 | 1篇 |
综合类 | 277篇 |
社会学 | 12324篇 |
统计学 | 5542篇 |
出版年
2023年 | 151篇 |
2021年 | 157篇 |
2020年 | 381篇 |
2019年 | 510篇 |
2018年 | 666篇 |
2017年 | 915篇 |
2016年 | 647篇 |
2015年 | 464篇 |
2014年 | 619篇 |
2013年 | 4602篇 |
2012年 | 866篇 |
2011年 | 731篇 |
2010年 | 617篇 |
2009年 | 537篇 |
2008年 | 611篇 |
2007年 | 601篇 |
2006年 | 592篇 |
2005年 | 577篇 |
2004年 | 513篇 |
2003年 | 466篇 |
2002年 | 528篇 |
2001年 | 656篇 |
2000年 | 642篇 |
1999年 | 614篇 |
1998年 | 445篇 |
1997年 | 391篇 |
1996年 | 442篇 |
1995年 | 386篇 |
1994年 | 367篇 |
1993年 | 367篇 |
1992年 | 417篇 |
1991年 | 419篇 |
1990年 | 394篇 |
1989年 | 391篇 |
1988年 | 381篇 |
1987年 | 349篇 |
1986年 | 326篇 |
1985年 | 383篇 |
1984年 | 382篇 |
1983年 | 358篇 |
1982年 | 263篇 |
1981年 | 227篇 |
1980年 | 224篇 |
1979年 | 291篇 |
1978年 | 205篇 |
1977年 | 189篇 |
1976年 | 160篇 |
1975年 | 167篇 |
1974年 | 180篇 |
1973年 | 150篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
The proliferation of the telephone answering machine raisesa number of questions about the continued efficiency of thetelephone as a data-gathering mechanism. The most critical ofthese is what effect the use of these machines might have onestablishing contact with potential respondents. If individualsroutinely use these machines to screen calls, then their accessibilityto telephone survey researchers will be restricted. A secondquestion is the degree to which respondents who own answeringmachines and are reachable are likely to participate in a survey.A third question is the extent to which the incidence of theanswering machine as a response disposition might vary by thetime of calling and the respondent's place of residence. Thefindings of this study, based on a nationwide survey, pointto a significant proportion of answering machine owners beingreachable and willing to participate. Furthermore, the answeringmachine appears to be in use more on weekends than on weekdayevenings and in more urbanized areas than in areas with fewerinhabitants. 相似文献
82.
83.
I. M. Endresen B. Ellertsen C. Endresen A. M. Hjelmen R. Matre H. Ursin 《Work and stress》1991,5(3):217-227
This study concerned the immunological correlates of stress and work. Self reported stress, emotional state, ego-strength, and defensiveness were examined in relation to measures of cellular immunity (T-cell response to Con A and number of T4 and T8 cells) and humoral immunity (concentrations of immunoglobulins and complement components in plasma) in a group of 96 Norwegian female bank employees. The analyses showed that workload, the stress factor with the highest group mean, was associated with number of T-cells, while strain due to body posture during work was related to concentrations of IgM and C3. Further, depression was significantly correlated with IgM concentration and T-cell number, and anxiety with C3 concentration. T-cell activity was the immunological parameter most consistently associated with psychological well-being, showing positive correlations with defensiveness and ego-strength and negative correlations with anxiety and depression. In conclusion, T-cell number and concentrations of IgM and C3 were sensitive to both work-related stress experience and emotional distress. Coping abilities, indicated by the MMPI Ego-strength scale and emotional distress, were reflected in T-cell activity; insufficient coping was associated with low T-cell activity. 相似文献
84.
The completely random character of radioactive disintegration provides the basis of a strong justification for a Poisson linear model for single-photon emission computed tomography data, which can be used to produce reconstructions of isotope densities, whether by maximum likelihood or Bayesian methods. However, such a model requires the construction of a matrix of weights, which represent the mean rates of arrival at each detector of photons originating from each point within the body space. Two methods of constructing these weights are discussed, and reconstructions resulting from phantom and real data are presented. 相似文献
85.
86.
Plateauing research often reveals a negative relationship between job content plateauing (i.e., lacking challenge in one's job) and work attitudes. This study explores situations where job content plateauing is associated with fewer negative work attitudes, revealing role ambiguity (i.e., being unclear about job duties and responsibilities) and hierarchical plateauing (i.e., low likelihood of promotions) as moderators of the job content plateau‐work attitude relationship. Specifically, job content plateaued employees reported greater job satisfaction and organizational commitment if they were not also experiencing a hierarchical plateau. Job content plateaued employees also reported greater job satisfaction when role ambiguity was low. 相似文献
87.
This article is a summary of the literature published in 2001 related to career counseling and career development. The review is designed to provide information to both career practitioners and researchers, with the focus on integration of practice and research. This summary of literature is organized around 5 primary areas: (a) career development, (b) career and vocational theories, (c) career interventions, (d) career assessment, and (e) professional issues. Within the framework of this review, attention is also given to contextual factors including gender, race or ethnicity, sexual orientation, and nationality. 相似文献
88.
We investigate how sociological argumentation differs from classical first–order logic. We focus on theories about age dependence of organizational mortality. The overall pattern of argument does not comply with the classical monotonicity principle: Adding premises overturns conclusions in an argument. The cause of nonmonotonicity is the need to derive conclusions from partial knowledge. We identify metaprinciples that appear to guide the observed sociological argumentation patterns, and we formalize a semantics to represent them. This semantics yields a new kind of logical consequence relation. We demonstrate that this new logic can reproduce the results of informal sociological theorizing and lead to new insights. It allows us to unify existing theory fragments, and it paves the way toward a complete classical theory. 相似文献
89.
Gustavo S. Mesch 《The International migration review》2002,36(3):912-934
Studies on immigrants' residential concentration have reported mixed findings. Some have argued that immigrants' residential concentration is a necessary step in the process of their social integration because there the newcomers find housing and employment opportunities as well as social support. As they learn the language and improve their socioeconomic status, they move to neighborhoods where they share space with the native population. Others have argued that the ethnic neighborhood delays the process of social integration in the new society because it nurtures informal ethnic social networks that provide incomplete information and retard the process of language acquisition. The study reported here investigated the effect of motivations, perceptions of attitudes of the host society, acculturation and socioeconomic factors on immigrants' residential concentration. It also sought to expand previous research by examining the relationship between immigrants'residential concentration and social relationships with nonimmigrants. Data for the study were collected in 1999 through a survey of immigrants from the FSU who had settled in one northern city in Israel after 1989. The results show a negative relationship of socioeconomic status and fluency in Hebrew with the percentage of immigrants residing in a given neighborhood. The higher the socioeconomic status and the more fluent the immigrant in Hebrew, the lower the percentage of immigrants in his or her neighborhood. Immigrants who expressed a proactive motivation for migration resided in neighborhoods with a low percentage of immigrants. Immigrants' residential concentration was not found to be related to the development of social relationships with the local population. The implications of the findings are discussed. 相似文献
90.
Reed W. Larson B. Bradford Brown Jeylan T. Mortimer 《Journal of research on adolescence》2002,12(1):iii-viii