全文获取类型
收费全文 | 117875篇 |
免费 | 3152篇 |
国内免费 | 1271篇 |
专业分类
管理学 | 2635篇 |
劳动科学 | 26篇 |
民族学 | 1786篇 |
人才学 | 9篇 |
人口学 | 1567篇 |
丛书文集 | 15979篇 |
理论方法论 | 5108篇 |
综合类 | 85965篇 |
社会学 | 3634篇 |
统计学 | 5589篇 |
出版年
2024年 | 200篇 |
2023年 | 585篇 |
2022年 | 888篇 |
2021年 | 976篇 |
2020年 | 1217篇 |
2019年 | 1165篇 |
2018年 | 1187篇 |
2017年 | 1536篇 |
2016年 | 1596篇 |
2015年 | 2189篇 |
2014年 | 5364篇 |
2013年 | 6737篇 |
2012年 | 6812篇 |
2011年 | 8158篇 |
2010年 | 6694篇 |
2009年 | 6885篇 |
2008年 | 7275篇 |
2007年 | 9201篇 |
2006年 | 9333篇 |
2005年 | 8679篇 |
2004年 | 8310篇 |
2003年 | 8007篇 |
2002年 | 6517篇 |
2001年 | 5438篇 |
2000年 | 3230篇 |
1999年 | 968篇 |
1998年 | 487篇 |
1997年 | 396篇 |
1996年 | 344篇 |
1995年 | 289篇 |
1994年 | 223篇 |
1993年 | 181篇 |
1992年 | 169篇 |
1991年 | 130篇 |
1990年 | 87篇 |
1989年 | 71篇 |
1988年 | 82篇 |
1987年 | 31篇 |
1986年 | 36篇 |
1985年 | 106篇 |
1984年 | 110篇 |
1983年 | 84篇 |
1982年 | 71篇 |
1981年 | 63篇 |
1980年 | 58篇 |
1979年 | 52篇 |
1978年 | 46篇 |
1977年 | 16篇 |
1976年 | 11篇 |
1975年 | 6篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
《汉语拼音方案》及其正词法是国家语言法律规定的拼写和注音工具。它具有音素化、拉丁化、口语化和词式化的性质。要破除阻力,让它发挥更大的作用。 相似文献
52.
Tim Futing Liao 《Journal of the Royal Statistical Society. Series A, (Statistics in Society)》2004,167(1):125-139
Summary. Social data often contain missing information. The problem is inevitably severe when analysing historical data. Conventionally, researchers analyse complete records only. Listwise deletion not only reduces the effective sample size but also may result in biased estimation, depending on the missingness mechanism. We analyse household types by using population registers from ancient China (618–907 AD) by comparing a simple classification, a latent class model of the complete data and a latent class model of the complete and partially missing data assuming four types of ignorable and non-ignorable missingness mechanisms. The findings show that either a frequency classification or a latent class analysis using the complete records only yielded biased estimates and incorrect conclusions in the presence of partially missing data of a non-ignorable mechanism. Although simply assuming ignorable or non-ignorable missing data produced consistently similarly higher estimates of the proportion of complex households, a specification of the relationship between the latent variable and the degree of missingness by a row effect uniform association model helped to capture the missingness mechanism better and improved the model fit. 相似文献
53.
Robert C. Feenstra 《Journal of Policy Modeling》1985,7(1):49-68
We examine the effects of the U.S.-Japan trade restraint on automobile prices and quality upgrading, for both Japanese imports and American small cars. From April 1981 to April 1984 the suggested retail price of all Japanese models increased by 15.8 percent, or 5.3 percent per year. We find that nearly the entire amount of this rise can be explained by the upgrading of individual models. This upgrading may benefit consumers who would purchase a luxury import in any case, but harms those who desire the basic imports. In addition to upgrading, we conclude that a second cost of the trade restraint has been to prevent the yen depreciation from being passed onto American consumers, in terms of lower imported auto prices. For U.S. small cars we find a 9.1 percent rise in the suggested retail price, or 3 percent per year, with a fraction of this amount due to model upgrading. If the yen depreciation had led to lower import prices without the trade restraint, then we expect that U.S. auto prices would have been lower, too. 相似文献
54.
艺术的本质在于其精神性,从艺术和时代精神的相互关系中去确立划分艺术形态的标准是符合艺术本质的.按照艺术所包含的精神内容的不同,艺术形态可分为神性艺术、人性艺术和理性艺术,以丰富的艺术史例可以说明其特征. 相似文献
55.
Diagnostics for dependence within time series extremes 总被引:1,自引:0,他引:1
Anthony W. Ledford Jonathan A. Tawn 《Journal of the Royal Statistical Society. Series B, Statistical methodology》2003,65(2):521-543
Summary. The analysis of extreme values within a stationary time series entails various assumptions concerning its long- and short-range dependence. We present a range of new diagnostic tools for assessing whether these assumptions are appropriate and for identifying structure within extreme events. These tools are based on tail characteristics of joint survivor functions but can be implemented by using existing estimation methods for extremes of univariate independent and identically distributed variables. Our diagnostic aids are illustrated through theoretical examples, simulation studies and by application to rainfall and exchange rate data. On the basis of these diagnostics we can explain characteristics that are found in the observed extreme events of these series and also gain insight into the properties of events that are more extreme than those observed. 相似文献
56.
罗秋菊 《暨南学报(哲学社会科学版)》2008,30(2):47-52
以展览业发达的东莞为研究样地,利用因素分析与聚类研究相结合的综合定量方法,对专业观众的观展动机进行综合评估及分类研究。研究表明,专业观众的非购买动机甚过购买动机,他们观展动机的四个维度因子依次为:搜集信息、建立市场关系、考察奖励、采购行为。本研究还发现专业观众的观展动机分为目标模糊型、信息搜集导向型、目标多维明确型三种类型。 相似文献
57.
创新大学研究院管理体制和运行机制,对于推动大学知识和科技创新、加速科技成果产业化和社会化具有重要作用。为此,大学研究院在管理体制方面要实行理事会领导下的院长负责制和虚实结合的矩阵式组织模式。在运行机制方面应建立稳定有力的政策支持体系和科学民主的战略决策制度,建立以团队合作为主的科研队伍体系,建立以竞争为核心的人员聘用体系,建立科学的业绩考评和高效的人才激励制度,建立长效完备的投资渠道,建立积极有效的成果转化机制。 相似文献
58.
叶海波 《长沙理工大学学报(社会科学版)》2008,23(1):55-58
宪法修改可分为全面修改和部分修改两种主要方式.全面修改和部分修改除了形式上的差别外,二者还存在认识论、修改评价等方面的重大区别. 相似文献
59.
林国标 《湖南文理学院学报(社会科学版)》2008,33(2):1-6
在专业、集约化生产越来越发达的条件下,人的全面发展如何可能?马克思"人的全面发展"理论的深层旨趣不仅仅是指能力的发展,更是追求社会的和谐.针对资本主义早期发展阶段劳动异化的状况,马克思主义经典作家强调变革旧的生产关系,促进人的发展.在现代化向纵深发展的当今时代,人的和谐发展则成为"人的全面发展"理论的主题. 相似文献
60.
For testing the fit of the inverse Gaussian distribution with unknown parameters, the empirical distribution-function statistic A2 is studied. Two procedures are followed in constructing the test statistic; they yield the same asymptotic distribution. In the first procedure the parameters in the distribution function are directly estimated, and in the second the distribution function is estimated by its Rao-Blackwell distribution estimator. A table is given for the asymptotic critical points of A2. These are shown to depend only on the ratio of the unknown parameters. An analysis is provided of the effect of estimating the ratio to enter the table for A2. This analysis enables the proposal of the complete operating procedure, which is sustained by a Monte Carlo study. 相似文献