全文获取类型
收费全文 | 3523篇 |
免费 | 88篇 |
国内免费 | 30篇 |
专业分类
管理学 | 119篇 |
民族学 | 27篇 |
人才学 | 2篇 |
人口学 | 30篇 |
丛书文集 | 401篇 |
理论方法论 | 75篇 |
综合类 | 1920篇 |
社会学 | 115篇 |
统计学 | 952篇 |
出版年
2024年 | 2篇 |
2023年 | 18篇 |
2022年 | 17篇 |
2021年 | 12篇 |
2020年 | 45篇 |
2019年 | 71篇 |
2018年 | 68篇 |
2017年 | 90篇 |
2016年 | 52篇 |
2015年 | 63篇 |
2014年 | 118篇 |
2013年 | 498篇 |
2012年 | 225篇 |
2011年 | 205篇 |
2010年 | 187篇 |
2009年 | 204篇 |
2008年 | 212篇 |
2007年 | 269篇 |
2006年 | 236篇 |
2005年 | 210篇 |
2004年 | 197篇 |
2003年 | 169篇 |
2002年 | 160篇 |
2001年 | 108篇 |
2000年 | 62篇 |
1999年 | 35篇 |
1998年 | 12篇 |
1997年 | 11篇 |
1996年 | 14篇 |
1995年 | 9篇 |
1994年 | 7篇 |
1993年 | 10篇 |
1992年 | 8篇 |
1991年 | 3篇 |
1990年 | 3篇 |
1989年 | 3篇 |
1988年 | 3篇 |
1987年 | 4篇 |
1986年 | 1篇 |
1985年 | 4篇 |
1984年 | 6篇 |
1983年 | 1篇 |
1982年 | 3篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1977年 | 2篇 |
1975年 | 1篇 |
排序方式: 共有3641条查询结果,搜索用时 15 毫秒
71.
运用文献资料法和逻辑分析法等研究方法,以构建人类命运共同体为切入视角,对习近平新时代体育外交思想进行深入分析。研究认为,习近平新时代体育外交主要内容包括:赛事外交是主流;足球外交成亮点;多边合作是关键。习近平新时代体育外交思想是中国外交思想的重要组成部分之一,是对中共历代领导人体育外交思想的继承和发展,也是建设新时代体育强国的内在要求。习近平新时代体育外交思想内涵丰富且意蕴深远,不仅展现了我国新时代外交多元化发展的一面,也促进了中国对外沟通、交流及合作,具有十分重要的意义。 相似文献
72.
Ufuk Beyaztas 《Pharmaceutical statistics》2019,18(3):388-398
This paper proposes a sufficient bootstrap method, which uses only the unique observations in the resamples, to assess the individual bioequivalence under 2 × 4 randomized crossover design. The finite sample performance of the proposed method is illustrated by extensive Monte Carlo simulations as well as a real‐experimental data set, and the results are compared with those obtained by the traditional bootstrap technique. Our records reveal that the proposed method is a good competitor or even better than the classical percentile bootstrap confidence limits. 相似文献
73.
《Journal of Statistical Computation and Simulation》2012,82(2-4):281-289
Simes' (1986) improved Bonferroni test is verified by simulations ?to control the α-level when testing the overall homogeneity hypothesis with all pairwise t statistics in a balanced parallel group design. Similarly, this result was found to hold (for practical purposes) in various underlying distributions other than the normal and in some unbalanced designs. To allow the use of step-up procedures based on pairwise t statistics, simulations were used to verify that Simes' test, when applied to testing multiple subset homogeneity hypotheses with pairwise t statistics also keeps the level ? α. Some robustness as above was found here too. Tables of the simulation results are provided and an example of a step-up Hommel-Shaffer type procedure with pairwise comparisons is given. 相似文献
74.
本文从求解梁挠度的二阶差分方程出发,通过Z变换,最后推导出计算挠度和转角的简单公式,使计算过程简化。对于变截面梁和复杂受载下,此法尤为简便。同时,这也是处理离散参数的数学方法—Z变换在力学中应用的初步尝试。 相似文献
75.
《Journal of homosexuality》2012,59(1):31-55
The current study evaluated the effects of a homonegativity awareness workshop on attitudes toward homosexuality and examined individual difference variables associated with attitude change. Participants included 71 female and 43 male students (approximate mean age?=?23). Compared to a control group of introductory psychology students, participants were less homonegative and erotophobic (F(1, 359)?=?62.47 and 15.92, ps?<?.001) after the workshop. Implications for contact with gay and lesbian persons through structured intervention programs on attitudes toward homosexuality are discussed in terms of both the practice and theory of reducing prejudice and discrimination. 相似文献
76.
Jelani Wiltshire Fred W. Huffer William C. Parker 《Journal of applied statistics》2014,41(9):2028-2043
Van Valen's Red Queen hypothesis states that within a homogeneous taxonomic group the age is statistically independent of the rate of extinction. The case of the Red Queen hypothesis being addressed here is when the homogeneous taxonomic group is a group of similar species. Since Van Valen's work, various statistical approaches have been used to address the relationship between taxon age and the rate of extinction. We propose a general class of test statistics that can be used to test for the effect of age on the rate of extinction. These test statistics allow for a varying background rate of extinction and attempt to remove the effects of other covariates when assessing the effect of age on extinction. No model is assumed for the covariate effects. Instead we control for covariate effects by pairing or grouping together similar species. Simulations are used to compare the power of the statistics. We apply the test statistics to data on Foram extinctions and find that age has a positive effect on the rate of extinction. A derivation of the null distribution of one of the test statistics is provided in the supplementary material. 相似文献
77.
Randall Lutter Linda Abbott Rick Becker Chris Borgert Ann Bradley Gail Charnley Susan Dudley Alan Felsot Nancy Golden George Gray Daland Juberg Mary Mitchell Nancy Rachman Lorenz Rhomberg Keith Solomon Stephen Sundlof Kate Willett 《Risk analysis》2015,35(2):186-192
Federal and other regulatory agencies often use or claim to use a weight of evidence (WoE) approach in chemical evaluation. Their approaches to the use of WoE, however, differ significantly, rely heavily on subjective professional judgment, and merit improvement. We review uses of WoE approaches in key articles in the peer‐reviewed scientific literature, and find significant variations. We find that a hypothesis‐based WoE approach, developed by Lorenz Rhomberg et al., can provide a stronger scientific basis for chemical assessment while improving transparency and preserving the appropriate scope of professional judgment. Their approach, while still evolving, relies on the explicit specification of the hypothesized basis for using the information at hand to infer the ability of an agent to cause human health impacts or, more broadly, affect other endpoints of concern. We describe and endorse such a hypothesis‐based WoE approach to chemical evaluation. 相似文献
78.
79.
我们党选用干部标准的思想经历了从毛泽东提出的"德才兼备"到胡锦涛明确提出的"德才兼备、以德为先"的历史的、理论的发展演变过程。从宏观上和战略上看,坚持"以德为先"选用干部,在理论层面和现实需求层面上都具有重大的价值意义。要使"以德为先"用人标准不致于流于形式,就必须健全完善与时俱进的党员干部"德"之衡量标准。 相似文献
80.
史全生 《扬州大学学报(人文社会科学版)》2014,(4):95-101
南社社友虽然在辛亥革命中发挥了巨大的积极作用,但自民国成立后便开始消沉失落。新文化运动中,为了重振南社昔日的雄风,迎上革命的新潮,柳亚子与叶楚伧等共同发起成立了新南社,制定章程,选举柳亚子为社长。国民党改组后由于柳亚子忙于党内斗争以及国民党右派的反对,新南社只存在一年即告停顿,却在宣传新三民主义和动员群众投身国民革命方面发挥了积极作用。 相似文献