全文获取类型
收费全文 | 250篇 |
免费 | 3篇 |
专业分类
管理学 | 8篇 |
民族学 | 1篇 |
丛书文集 | 22篇 |
理论方法论 | 13篇 |
综合类 | 157篇 |
社会学 | 12篇 |
统计学 | 40篇 |
出版年
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2019年 | 4篇 |
2018年 | 4篇 |
2017年 | 6篇 |
2016年 | 3篇 |
2015年 | 4篇 |
2014年 | 8篇 |
2013年 | 27篇 |
2012年 | 12篇 |
2011年 | 16篇 |
2010年 | 6篇 |
2009年 | 8篇 |
2008年 | 15篇 |
2007年 | 13篇 |
2006年 | 20篇 |
2005年 | 16篇 |
2004年 | 19篇 |
2003年 | 17篇 |
2002年 | 16篇 |
2001年 | 16篇 |
2000年 | 5篇 |
1999年 | 2篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1996年 | 2篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1987年 | 1篇 |
1986年 | 1篇 |
排序方式: 共有253条查询结果,搜索用时 15 毫秒
1.
对普通野生稻和药用野生稻种子休眠的原因进行了探讨,表明野生稻种的遗传特性、形态性状、颖壳的透性和种子的生理特性与种子休眠有关。研究结果为打破野生稻种子休眠、提高其发茅力提供了依据和适宜的方法。 相似文献
2.
Projecting losses associated with hurricanes is a complex and difficult undertaking that is wrought with uncertainties. Hurricane Charley, which struck southwest Florida on August 13, 2004, illustrates the uncertainty of forecasting damages from these storms. Due to shifts in the track and the rapid intensification of the storm, real-time estimates grew from 2 to 3 billion dollars in losses late on August 12 to a peak of 50 billion dollars for a brief time as the storm appeared to be headed for the Tampa Bay area. The storm hit the resort areas of Charlotte Harbor near Punta Gorda and then went on to Orlando in the central part of the state, with early poststorm estimates converging on a damage estimate in the 28 to 31 billion dollars range. Comparable damage to central Florida had not been seen since Hurricane Donna in 1960. The Florida Commission on Hurricane Loss Projection Methodology (FCHLPM) has recognized the role of computer models in projecting losses from hurricanes. The FCHLPM established a professional team to perform onsite (confidential) audits of computer models developed by several different companies in the United States that seek to have their models approved for use in insurance rate filings in Florida. The team's members represent the fields of actuarial science, computer science, meteorology, statistics, and wind and structural engineering. An important part of the auditing process requires uncertainty and sensitivity analyses to be performed with the applicant's proprietary model. To influence future such analyses, an uncertainty and sensitivity analysis has been completed for loss projections arising from use of a Holland B parameter hurricane wind field model. Uncertainty analysis quantifies the expected percentage reduction in the uncertainty of wind speed and loss that is attributable to each of the input variables. 相似文献
3.
何宁生 《西北大学学报(哲学社会科学版)》2002,32(3):75-79
前秦是东晋十六国时期惟一统一了北方 ,且政治较为清明、最具有规模气度的一个政权。前秦统治者对儒学推崇备至 ,决定了其法律思想为 :德化为先、礼法并用和约法慎刑。在选官制度方面 ,前秦采取了多途径选贤求才之策 ,并通过推行一系列积极的经济法律措施 ,促进经济的发展 ,前秦统治者对法律的运行亦颇为重视 ,主要体现在司法机构比较健全 ,注重督励官吏公正和严格执法。前秦之所以能出现十六国时期仅见的盛世 ,与其法制建设不无关系 相似文献
4.
刘伟四 《南华大学学报(社会科学版)》2004,5(3):33-35,59
近年来,我国社会主义市场经济体制的建立和完善,权力制约机制的建立与加强等都对国家审计有了更高的要求,国家审计也应根据我国审计环境的发展,从完善国家审计法律法规、加强国家审计机关及人员监督等方面入手,进一步完善我国国家审计职责、职权,以更好地为国家经济发展服务。 相似文献
5.
For many continuous distributions, a closed-form expression for their quantiles does not exist. Numerical approximations for their quantiles are developed on a distribution-by-distribution basis. This work develops a general approximation for quantiles using the Taylor expansion. Our method only requires that the distribution has a continuous probability density function and its derivatives can be derived to a certain order (usually 3 or 4). We demonstrate our unified approach by approximating the quantiles of the normal, exponential, and chi-square distributions. The approximation works well for these distributions. 相似文献
6.
通过对广东农户民间借贷行为实地调查的问卷进行数据分析,了解农村民间借贷中的资金供求关系,发现存在的融资约束问题,进而对融资约束环境下民间借贷资金利率定价过程进行实证分析;着重考察农村民间借贷利率受公共信息和私人信息影响的程度,从借款人和贷款人的角度分别建立定价模型进行经验分析。结果显示,定价模型在F检验1%水平上显著,其他模型具有R2的统计显著性;反映借款用途的变量在10%水平上显著,其他变量均在5%水平上显著。这说明该市场利率能够反映公共信息的影响,借款人和贷款人的利率定价也反映了各自私人信息中相关风险和财务能力因素的影响,得到的经验结论主要是:第一,农村民间借贷市场是自主交易的金融市场;第二,其利率定价过程基本市场化。 相似文献
7.
Thomas AMOSS Philippe ASKENAZY Martin CHEVALIER Christine ERHEL Hloïse PETIT Antoine REBRIOUX 《International labour review / International Labour Office》2019,158(3):463-487
In this comparative study, the authors analyse the relationships between industrial relations and workforce or wage adjustments in response to the 2007–08 crisis, using two highly comparable establishment‐level surveys conducted in Great Britain (WERS) and France (REPONSE) in 2010–12. Notwithstanding contextual differences in the countries’ productive systems and the timing and impact of the crisis, the relationships between industrial relations and adjustment strategies appear to have been similar (trade union presence not preventing adjustments). Differences in industrial relations are therefore not found to provide an explanation for the different modes of adjustment observed at the macroeconomic level. 相似文献
8.
上海市发展改革研究院课题组 《科学发展》2014,(4):88-99
生态文明建设是一项系统工程,需要通过整体推进,构筑规划、建设、管理、技术、产业、社会和合作协同发展的综合体系。未来上海应以建立和完善市场机制为核心,以法律机制为前提,以政府监管机制为保障,以能力建设机制为基础,以社会参与机制为监督,按照"引逼结合、多方合力、突出重点、先行先试"的原则,加快上海生态文明建设机制创新。主要途径有:完善碳排放交易试点,建立长效市场机制;推进分布式能源应用,提高清洁能源比重;加快新能源汽车推广,优化交通能源结构;培育发展再制造产业,推广先进制造理念。 相似文献
9.
Physical restraint is used in inpatient services for people with intellectual disabilities as a way of holding a person to avoid injury. This article uses data from an ethnographic study in a locked unit in the north of England to explore women’s experiences of physical restraint using a feminist disability studies analysis. Data consists of field notes as well as interviews with 16 of the women who had experienced restraint, and 10 staff who worked with them. The women gave insights into the gendered phenomenon of restraint in light of their past experiences of violence. The authors argue that restraint is used with women to encourage passivity at times when more relational and therapeutic methods could be used. The article offers recommendations for alternative strategies that services can encourage. 相似文献
10.