全文获取类型
收费全文 | 7323篇 |
免费 | 292篇 |
国内免费 | 82篇 |
专业分类
管理学 | 975篇 |
民族学 | 51篇 |
人才学 | 2篇 |
人口学 | 128篇 |
丛书文集 | 564篇 |
理论方法论 | 422篇 |
综合类 | 4365篇 |
社会学 | 412篇 |
统计学 | 778篇 |
出版年
2024年 | 8篇 |
2023年 | 57篇 |
2022年 | 349篇 |
2021年 | 127篇 |
2020年 | 99篇 |
2019年 | 167篇 |
2018年 | 151篇 |
2017年 | 173篇 |
2016年 | 218篇 |
2015年 | 245篇 |
2014年 | 458篇 |
2013年 | 620篇 |
2012年 | 529篇 |
2011年 | 450篇 |
2010年 | 327篇 |
2009年 | 443篇 |
2008年 | 412篇 |
2007年 | 391篇 |
2006年 | 385篇 |
2005年 | 438篇 |
2004年 | 386篇 |
2003年 | 370篇 |
2002年 | 249篇 |
2001年 | 195篇 |
2000年 | 133篇 |
1999年 | 41篇 |
1998年 | 16篇 |
1997年 | 17篇 |
1996年 | 31篇 |
1995年 | 16篇 |
1994年 | 12篇 |
1993年 | 25篇 |
1992年 | 12篇 |
1991年 | 9篇 |
1990年 | 5篇 |
1989年 | 4篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1985年 | 15篇 |
1984年 | 26篇 |
1983年 | 21篇 |
1982年 | 19篇 |
1981年 | 18篇 |
1980年 | 9篇 |
1979年 | 9篇 |
1978年 | 8篇 |
排序方式: 共有7697条查询结果,搜索用时 281 毫秒
31.
通过对高校科技工作管理者、高校教师以及部分企业的调研发现,目前影响湖北省高校科技成果转化的因素主要是政府管理、资金投入、高校观念转变与机制创新、企业重视等方面,并提出相应的对策与建议. 相似文献
32.
从制度经济学的分析角度,以制度变迁为理论出发点,通过对我国中小银行制度安排的历史分析,解释了制度变迁的理论依据,并探究其在中国金融市场化过程中的制度变迁方式及发展思路,试图寻求一种过渡性的非正式契约安排来较好地解决问题。 相似文献
33.
Bias Correction in the Dynamic Panel Data Model with a Nonscalar Disturbance Covariance Matrix 总被引:1,自引:0,他引:1
Maurice J. G. Bun 《Econometric Reviews》2003,22(1):29-58
Approximation formulae are developed for the bias of ordinary and generalized Least Squares Dummy Variable (LSDV) estimators in dynamic panel data models. Results from Kiviet [Kiviet, J. F. (1995), on bias, inconsistency, and efficiency of various estimators in dynamic panel data models, J. Econometrics68:53-78; Kiviet, J. F. (1999), Expectations of expansions for estimators in a dynamic panel data model: some results for weakly exogenous regressors, In: Hsiao, C., Lahiri, K., Lee, L-F., Pesaran, M. H., eds., Analysis of Panels and Limited Dependent Variables, Cambridge: Cambridge University Press, pp. 199-225] are extended to higher-order dynamic panel data models with general covariance structure. The focus is on estimation of both short- and long-run coefficients. The results show that proper modelling of the disturbance covariance structure is indispensable. The bias approximations are used to construct bias corrected estimators which are then applied to quarterly data from 14 European Union countries. Money demand functions for M1, M2 and M3 are estimated for the EU area as a whole for the period 1991: I-1995: IV. Significant spillovers between countries are found reflecting the dependence of domestic money demand on foreign developments. The empirical results show that in general plausible long-run effects are obtained by the bias corrected estimators. Moreover, finite sample bias, although of moderate magnitude, is present underlining the importance of more refined estimation techniques. Also the efficiency gains by exploiting the heteroscedasticity and cross-correlation patterns between countries are sometimes considerable. 相似文献
34.
浅析英国工业革命的市场条件 总被引:1,自引:0,他引:1
解建红 《山西高等学校社会科学学报》2006,18(1):25-27
国内外市场的存在及市场需求的不断增长的压力是英国工业生产发展的主要动因。英国可资利用的市场规模远较欧洲其它国家的市场大,这大大便利了英国工业品的生产与销售。英国市场的性质也有助于工业再生产的进行。 相似文献
35.
水杨酸-邻菲罗啉三元稀土配合物的合成、表征及抑菌作用 总被引:10,自引:0,他引:10
在无水乙醇溶液中合成了六种水杨酸-邻菲罗啉-三元稀土配合物,采用元素分析,红外光谱,差热热重等测试方法进行表征,确定配合物的化学组成为RE(Phen)2(Sa l)2C l.H2O(RE=L a3+,P r3+,N d3+,Sm3+,G d3+,D y3+).研究了稀土配合物的抑菌活性,结果表明三元稀土配合物的抑菌效果较单独的稀土氯化物、邻菲罗啉和水杨酸好. 相似文献
36.
李远明 《湖北民族学院学报(哲学社会科学版)》2007,25(5):28-31
教育信息资源作为信息资源的一个子集,在提高教育教学质量,挖掘教育的发展潜力上具有重要作用。在新的社会与经济环境下,深入研究恩施州教育信息资源的建设,对恩施州教育信息资源开发利用、全面发展起到重要的先导作用和促进作用。 相似文献
37.
The paper presents a conceptual review over the main aspects concerning the role of human capital investments and training activities within production processes, followed by empirical evidence on two local economic systems in Northern Italy, based on recent survey data. Theoretical and empirical considerations are brought together in order to provide new insights on the role of training and the factors associated to training activities at firm level.The potential driving factors of training here analysed compounds structural characteristics, labour demand dynamics, human resource management practices, workforce features, and firm performances. We observe that training activities emerge positively associated with high-performance practices, innovative labour demand features, workforce skill level, firm size, and are affected by labour flexibility in various directions. Empirical evidence confirms most previous results but also adds further important insights. The analysis suggests that a widening gap, between few innovatively evolving and many stagnant firms, could characterise the future dynamics of the Region. The high relevance of structural variables, labour demand factors and HRM/innovation practices shows that regional industrial policies and labour policies should be jointly implemented for increasing potential firm productivity. This is a key concern for the current debate on local systems economic development in the European and Italian environment. 相似文献
38.
The phenotype of a quantitative trait locus (QTL) is often modeled by a finite mixture of normal distributions. If the QTL effect depends on the number of copies of a specific allele one carries, then the mixture model has three components. In this case, the mixing proportions have a binomial structure according to the Hardy–Weinberg equilibrium. In the search for QTL, a significance test of homogeneity against the Hardy–Weinberg normal mixture model alternative is an important first step. The LOD score method, a likelihood ratio test used in genetics, is a favored choice. However, there is not yet a general theory for the limiting distribution of the likelihood ratio statistic in the presence of unknown variance. This paper derives the limiting distribution of the likelihood ratio statistic, which can be described by the supremum of a quadratic form of a Gaussian process. Further, the result implies that the distribution of the modified likelihood ratio statistic is well approximated by a chi-squared distribution. Simulation results show that the approximation has satisfactory precision for the cases considered. We also give a real-data example. 相似文献
39.
雷莹 《长江大学学报(社会科学版)》2004,27(4):72-74
中国证券市场尚不完善 ,上市公司操纵利润的现象屡见不鲜。虚减成本费用是上市公司调增利润更简便的方法。在财务运作中 ,上市公司频繁运用虚拟资产、利息资本化等五种方法虚减成本费用 相似文献
40.
民主政治的理性就在于程序的理性。当今中国,不仅要把民主政治制度化,以树立民主政治的权威地位,而且应当努力使民主政治程序化,使民主政治特别是行政民主和党内民主的各项制度得到真正落实,加强社会主义民主政治建设,实现民主政治的制度化、规范化、程序化的统一。 相似文献