全文获取类型
收费全文 | 18461篇 |
免费 | 630篇 |
国内免费 | 259篇 |
专业分类
管理学 | 2508篇 |
劳动科学 | 2篇 |
民族学 | 64篇 |
人才学 | 4篇 |
人口学 | 341篇 |
丛书文集 | 896篇 |
理论方法论 | 416篇 |
综合类 | 8740篇 |
社会学 | 547篇 |
统计学 | 5832篇 |
出版年
2024年 | 28篇 |
2023年 | 154篇 |
2022年 | 266篇 |
2021年 | 272篇 |
2020年 | 417篇 |
2019年 | 524篇 |
2018年 | 604篇 |
2017年 | 759篇 |
2016年 | 652篇 |
2015年 | 657篇 |
2014年 | 1020篇 |
2013年 | 2344篇 |
2012年 | 1340篇 |
2011年 | 1201篇 |
2010年 | 994篇 |
2009年 | 954篇 |
2008年 | 1034篇 |
2007年 | 1006篇 |
2006年 | 974篇 |
2005年 | 795篇 |
2004年 | 658篇 |
2003年 | 558篇 |
2002年 | 492篇 |
2001年 | 426篇 |
2000年 | 277篇 |
1999年 | 210篇 |
1998年 | 111篇 |
1997年 | 125篇 |
1996年 | 84篇 |
1995年 | 76篇 |
1994年 | 51篇 |
1993年 | 43篇 |
1992年 | 47篇 |
1991年 | 47篇 |
1990年 | 27篇 |
1989年 | 25篇 |
1988年 | 20篇 |
1987年 | 14篇 |
1986年 | 8篇 |
1985年 | 13篇 |
1984年 | 12篇 |
1983年 | 10篇 |
1982年 | 7篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1979年 | 4篇 |
1978年 | 2篇 |
1977年 | 2篇 |
1976年 | 2篇 |
1975年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
91.
近年来文化创意产业逐渐成为新时期国民经济增长的新动力,然而由于金融发展水平低下,文化创意产业出现了金融抑制现象。应用MRW模型对中国文化创意产业金融抑制现象进行实证分析,发现文化创意产业价值评估难是导致金融抑制的主要原因。应完善金融机构文化创意产业评估机制,对文化创意产品的内在价值进行合理的评估,进而减缓文化创意产业的金融抑制现象的发生。 相似文献
92.
93.
94.
95.
Patrick Emmenegger 《Social Policy & Administration》2010,44(1):20-39
This article explores the religious roots of job security regulations in Western democracies by putting Esping-Andersen's famous social Catholicism thesis to the test. Esping-Andersen argues that due to religious socialization, Catholics exhibit more conservative family values, i.e. they tend to support the male breadwinner model. To sustain this model of family organization, Catholics are expected to support job security regulations. These regulations have been described in the literature as important determinants of gender-segregated labour markets and low female employment rates. Data from this article show that while Catholics indeed support more conservative family models, so do Reformed Protestants and religious persons in general. Furthermore, no relationship between religious denomination and preferences for job security regulations can be observed. The analysis thus refutes Esping-Andersen's social Catholicism thesis. 相似文献
96.
罗昕 《中国地质大学学报(社会科学版)》2010,10(2)
基于维纳的经典控制模式,依照接入控制、过滤控制、编辑控制、分析控制四个流程,尝试建构了网络内容的技术控制模式。此模式着眼于复杂的网络传播环境,反映了多传播时代的多向反馈,体现了效果/批判的范式融合,综合了立体多元的控制手段。 相似文献
97.
Sondra S. Teske Mark H. Weir Timothy A. Bartrand Yin Huang Sushil B. Tamrakar Charles N. Haas 《Risk analysis》2014,34(5):911-928
The effect of bioaerosol size was incorporated into predictive dose‐response models for the effects of inhaled aerosols of Francisella tularensis (the causative agent of tularemia) on rhesus monkeys and guinea pigs with bioaerosol diameters ranging between 1.0 and 24 μm. Aerosol‐size‐dependent models were formulated as modification of the exponential and β‐Poisson dose‐response models and model parameters were estimated using maximum likelihood methods and multiple data sets of quantal dose‐response data for which aerosol sizes of inhaled doses were known. Analysis of F. tularensis dose‐response data was best fit by an exponential dose‐response model with a power function including the particle diameter size substituting for the rate parameter k scaling the applied dose. There were differences in the pathogen's aerosol‐size‐dependence equation and models that better represent the observed dose‐response results than the estimate derived from applying the model developed by the International Commission on Radiological Protection (ICRP, 1994) that relies on differential regional lung deposition for human particle exposure. 相似文献
98.
This article suggests an efficient method of estimating a rare sensitive attribute which is assumed following Poisson distribution by using three-stage unrelated randomized response model instead of the Land et al. model (2011) when the population consists of some different sized clusters and clusters selected by probability proportional to size(:pps) sampling. A rare sensitive parameter is estimated by using pps sampling and equal probability two-stage sampling when the parameter of a rare unrelated attribute is assumed to be known and unknown.We extend this method to the case of stratified population by applying stratified pps sampling and stratified equal probability two-stage sampling. An empirical study is carried out to show the efficiency of the two proposed methods when the parameter of a rare unrelated attribute is assumed to be known and unknown. 相似文献
99.
100.
The benchmark dose (BMD) approach has gained acceptance as a valuable risk assessment tool, but risk assessors still face significant challenges associated with selecting an appropriate BMD/BMDL estimate from the results of a set of acceptable dose‐response models. Current approaches do not explicitly address model uncertainty, and there is an existing need to more fully inform health risk assessors in this regard. In this study, a Bayesian model averaging (BMA) BMD estimation method taking model uncertainty into account is proposed as an alternative to current BMD estimation approaches for continuous data. Using the “hybrid” method proposed by Crump, two strategies of BMA, including both “maximum likelihood estimation based” and “Markov Chain Monte Carlo based” methods, are first applied as a demonstration to calculate model averaged BMD estimates from real continuous dose‐response data. The outcomes from the example data sets examined suggest that the BMA BMD estimates have higher reliability than the estimates from the individual models with highest posterior weight in terms of higher BMDL and smaller 90th percentile intervals. In addition, a simulation study is performed to evaluate the accuracy of the BMA BMD estimator. The results from the simulation study recommend that the BMA BMD estimates have smaller bias than the BMDs selected using other criteria. To further validate the BMA method, some technical issues, including the selection of models and the use of bootstrap methods for BMDL derivation, need further investigation over a more extensive, representative set of dose‐response data. 相似文献