全文获取类型
收费全文 | 15747篇 |
免费 | 196篇 |
国内免费 | 76篇 |
专业分类
管理学 | 1751篇 |
劳动科学 | 7篇 |
民族学 | 187篇 |
人才学 | 2篇 |
人口学 | 2514篇 |
丛书文集 | 1037篇 |
理论方法论 | 727篇 |
综合类 | 3778篇 |
社会学 | 4609篇 |
统计学 | 1407篇 |
出版年
2024年 | 10篇 |
2023年 | 29篇 |
2022年 | 58篇 |
2021年 | 99篇 |
2020年 | 61篇 |
2019年 | 49篇 |
2018年 | 1712篇 |
2017年 | 1729篇 |
2016年 | 1152篇 |
2015年 | 198篇 |
2014年 | 243篇 |
2013年 | 327篇 |
2012年 | 624篇 |
2011年 | 1525篇 |
2010年 | 1486篇 |
2009年 | 1225篇 |
2008年 | 1224篇 |
2007年 | 1432篇 |
2006年 | 419篇 |
2005年 | 581篇 |
2004年 | 492篇 |
2003年 | 432篇 |
2002年 | 345篇 |
2001年 | 199篇 |
2000年 | 127篇 |
1999年 | 54篇 |
1998年 | 30篇 |
1997年 | 24篇 |
1996年 | 43篇 |
1995年 | 20篇 |
1994年 | 8篇 |
1993年 | 11篇 |
1992年 | 12篇 |
1991年 | 5篇 |
1990年 | 7篇 |
1989年 | 6篇 |
1988年 | 14篇 |
1987年 | 1篇 |
1985年 | 2篇 |
1984年 | 2篇 |
1982年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Many recent institutional reforms of the financial system have relied on the introduction of an explicit scheme of deposit insurance. This instrument aims at two main targets, contributing to systemic stability and protecting depositors. However, it may also affect the interest rate spread in the banking system, which can be viewed as an indicator of either inefficiency or market power in this financial segment. This paper provides an empirical investigation of the effect of deposit insurance and other institutional and economic variables on bank interest rates across countries. We find that deposit insurance increases the lending–deposit spread in banking. The main effect seems to arise not from the deposit side though, but from an increase in the lending rate. We interpret this result as evidence of the presence of moral hazard problems related to this instrument. We also find that higher quality of institutions is associated with lower spreads, thus contributing to eroding sources of market power in the banking sector. 相似文献
42.
本文利用孔板及均速管的组合对空气-水两相流的流量及质量含气率进行了单、双参数测量研究,给出了两种元件的单参数公式及其双参数组合公式。对3种不同孔径的孔板、4组孔板及均速管间距以及两种型号的均速管进行了研究,获得了比较满意的结果。 相似文献
43.
Feng Xinghai 《佛山科学技术学院学报(社会科学版)》1992,(4)
根据机械振动和积木式传递矩阵法的原理,提出了用于估算单、双转子系统一阶临界转速的实用方法,从而得到的“K3表”可方便地使用于产品的方案设计阶段或现场排故,并可得到满意的工程精度。 相似文献
44.
胡峰 《云南民族大学学报(哲学社会科学版)》2006,23(5):178-181
中国企业对外并购的风潮刚刚拉开帷幕,要充分利用海外并购的机会,中国企业就必须制定明确的全球化战略并建立专业的并购能力。并购海外竞争对手是中国企业迅速占领海外市场并掌握技术专业知识的快速通道,但海外并购作为通向全球化运营的途径之一,却是最具挑战性的一种方式,这种并购成果绝非唾手可得,中国政府需要做的是更多地从政策支持角度去推进海外并购。 相似文献
45.
We employ vector autoregressive techniques to determine the current state of the labor queue. Unemployment rate differentials
have narrowed in recent years, potentially due to a change in the queue ordering, though a tight labor market and a stable
queue would yield similar results. We find no evidence that the queue ordering has changed, which brings into question the
resiliency of gains made by minority groups. We employ the same techniques to reveal the state of the queue across geographic
regions and find that substantial differences exist across regions, implying variation in the relative labor force status
of demographic groups. 相似文献
46.
Point processes are the stochastic models most suitable for describing physical phenomena that appear at irregularly spaced
times, such as the earthquakes. These processes are uniquely characterized by their conditional intensity, that is, by the
probability that an event will occur in the infinitesimal interval (t, t+Δt), given the history of the process up tot. The seismic phenomenon displays different behaviours on different time and size scales; in particular, the occurrence of
destructive shocks over some centuries in a seismogenic region may be explained by the elastic rebound theory. This theory
has inspired the so-called stress release models: their conditional intensity translates the idea that an earthquake produces
a sudden decrease in the amount of strain accumulated gradually over time along a fault, and the subsequent event occurs when
the stress exceeds the strength of the medium. This study has a double objective: the formulation of these models in the Bayesian
framework, and the assignment to each event of a mark, that is its magnitude, modelled through a distribution that depends
at timet on the stress level accumulated up to that instant. The resulting parameter space is constrained and dependent on the data,
complicating Bayesian computation and analysis. We have resorted to Monte Carlo methods to solve these problems. 相似文献
47.
Michael S. Rendall Ryan Admiraal Alessandra DeRose Paola DiGiulio Mark S. Handcock Filomena Racioppi 《Statistical Methods and Applications》2008,17(4):519-539
In non-experimental research, data on the same population process may be collected simultaneously by more than one instrument.
For example, in the present application, two sample surveys and a population birth registration system all collect observations
on first births by age and year, while the two surveys additionally collect information on women’s education. To make maximum
use of the three data sources, the survey data are pooled and the population data introduced as constraints in a logistic
regression equation. Reductions in standard errors about the age and birth-cohort parameters of the regression equation in
the order of three-quarters are obtained by introducing the population data as constraints. A halving of the standard errors
about the education parameters is achieved by pooling observations from the larger survey dataset with those from the smaller
survey. The percentage reduction in the standard errors through imposing population constraints is independent of the total
survey sample size. 相似文献
48.
49.
50.
论述了推动篮球技术模式的因素——攻守对抗矛盾、技战术矛盾、规则与技战术矛盾、训练学因素、现代科学技术、实践与认识等几个部分,用系统论的观点探讨了推动篮球运动的技术模式和篮球运动技术的发展模式,以指导篮球教学与训练。 相似文献