全文获取类型
收费全文 | 16031篇 |
免费 | 393篇 |
国内免费 | 129篇 |
专业分类
管理学 | 1541篇 |
劳动科学 | 18篇 |
民族学 | 172篇 |
人才学 | 1篇 |
人口学 | 844篇 |
丛书文集 | 1334篇 |
理论方法论 | 1059篇 |
综合类 | 5197篇 |
社会学 | 4038篇 |
统计学 | 2349篇 |
出版年
2023年 | 92篇 |
2022年 | 158篇 |
2021年 | 233篇 |
2020年 | 238篇 |
2019年 | 285篇 |
2018年 | 302篇 |
2017年 | 433篇 |
2016年 | 328篇 |
2015年 | 389篇 |
2014年 | 491篇 |
2013年 | 2001篇 |
2012年 | 684篇 |
2011年 | 765篇 |
2010年 | 774篇 |
2009年 | 758篇 |
2008年 | 766篇 |
2007年 | 803篇 |
2006年 | 793篇 |
2005年 | 707篇 |
2004年 | 421篇 |
2003年 | 397篇 |
2002年 | 481篇 |
2001年 | 428篇 |
2000年 | 325篇 |
1999年 | 223篇 |
1998年 | 164篇 |
1997年 | 164篇 |
1996年 | 164篇 |
1995年 | 153篇 |
1994年 | 114篇 |
1993年 | 149篇 |
1992年 | 158篇 |
1991年 | 136篇 |
1990年 | 142篇 |
1989年 | 122篇 |
1988年 | 121篇 |
1987年 | 116篇 |
1986年 | 101篇 |
1985年 | 87篇 |
1984年 | 116篇 |
1983年 | 98篇 |
1982年 | 96篇 |
1981年 | 63篇 |
1980年 | 93篇 |
1979年 | 105篇 |
1978年 | 73篇 |
1977年 | 82篇 |
1976年 | 70篇 |
1975年 | 85篇 |
1974年 | 68篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
Blaine J. Fowers Kelly H. Montel David H. Olson 《Journal of marital and family therapy》1996,22(1):103-119
Recent studies have shown that group differences in marital stability and satisfaction can be predicted based on premarital relationship quality. There is also a growing literature indicating that there are distinct types of relationships, both premaritally and developmentally over time. This study examined the relationship between the four premarital types (Vitalized, Harmonious, Traditional, and Conflicted) identified by Fowers and Olson (1992) and relationship outcome over a 3-year period with 393 couples. A substantial relationship was found, with conflicted couples being the most likely to separate or divorce. Vitalized couples had the highest levels of satisfaction, followed by Harmonious, Traditional, and Conflicted couples. Traditional couples were less likely to have divorced than Harmonious couples, even though Harmonious couples had higher premarital relationship satisfaction scores. 相似文献
52.
Scheduling Updates of Probabilistic Risk Assessments: The Arkansas Nuclear One-Unit 1 Experience 总被引:1,自引:0,他引:1
This paper presents the results of a study that identified how often a probabilistic risk assessment (PRA)should be updated to accommodate the changes that take place at nuclear power plants. Based on a 7-year analysis of design and procedural changes at one plant, we consider 5 years to be the maximum interval for updating PRAs. This conclusion is preliminary because it is based on the review of changes that occurred at a single plant, and it addresses only PRAs that involve a Level 1 analysis (i.e., a PRA including calculation of core damage frequency only). Nevertheless, this conclusion indicates that maintaining a useful PRA requires periodic updating efforts. However, the need for this periodic update stems only partly from the number of changes that can be expected to take place at nuclear power plants–changes that individually have only a moderate to minor impact on the PRA, but whose combined impact is substantial and necessitates a PRA update. Additionally, a comparison of two generations of PRAs performed about 5 years apart indicates that PRAs must be periodically updated to reflect the evolution of PRA methods. The most desirable updating interval depends on these two technical considerations as well as the cost of updating the PRA. (Cost considerations, however, were beyond the scope of this study.) 相似文献
53.
54.
Beryllium is the strongest of the lightweight metals. Used primarily in military applications prior to the end of the Cold War, beryllium is finding new applications in many commercial products, including computers, telecommunication equipment, and consumer and automotive electronics. The use of beryllium in nondefense consumer applications is of concern because beryllium is toxic. Inhalation of beryllium dust or vapor causes a chronic lung disease in some individuals at concentrations as low as 0.01 microg/m3 in air. As beryllium enters wider commerce, it is prudent to ask what risks this might present to the general public and to workers downstream of the beryllium materials industry. We address this question by evaluating the potential for beryllium exposure from the manufacturing, use, recycle, and disposal of beryllium-containing products. Combining a market study with a qualitative exposure analysis, we determine which beryllium applications and life cycle phases have the largest exposure potential. Our analysis suggests that use and maintenance of the most common types of beryllium-containing products do not result in any obvious exposures of concern, and that maintenance activities result in greater exposures than product use. Product disposal has potential to present significant individual risks, but uncertainties concerning current and future routes of product disposal make it difficult to be definitive. Overall, additional exposure and dose-response data are needed to evaluate both the health significance of many exposure scenarios, and the adequacy of existing regulations to protect workers and the public. Although public exposures to beryllium and public awareness and concern regarding beryllium risks are currently low, beryllium risks have psychometric qualities that may lead to rapidly heightened public concern. 相似文献
55.
Assessing reoffense risk with juvenile sexual offenders 总被引:1,自引:0,他引:1
This article summarizes a two-year study of juvenile sexual offenders in Washington. Both community-based and institution-based treatment programs were evaluated. A typical profile of the juvenile sexual offender is offered, as well as recidivism data from a mean 20-month follow-up period. 相似文献
56.
采用单腔多模谐振腔,通过部分置换样品的方法,在程控标量网络分析系统上,实现了高 T_c 超导材料微波特性的自动化测量。该方法简单、准确,能同时测出超导样品的工作频率、微波表面阻抗、工作温度等多个参数,并能以图或表的形式给出测试结果。给出了3 cm 频段上YBCO 块材样品在77K 及附近温度下的测量结果,指出 YBCO 块材的微波特性还有待提高。 相似文献
57.
Abstract Agroforestry, the practice of raising crops and trees together in ways that are mutually beneficial, provides farmers with an alternative to more conventional farming practices. In this paper, we apply Bourdieu's concepts of “field” and “habitus” in an attempt to better understand the practice of farming and the role that agroforestry may have in farming systems. Analysis is based on qualitative and quantitative interviews of farmers and other key informants in two regions, Fox‐Wyaconda Watershed in northeast Missouri and Scott County in southeast Missouri. Within the field of farming, farmers emphasized the importance of economic, family and rental relations. Important habitus considerations include different interpretations of what constitutes farming and what constitutes forestry. Based on Bourdieu's theoretical framework, we offer three alternative paths of social change that may lead to more widespread utilization of agroforestry. 相似文献
58.
日本传统社会的核心是由上下级隶属关系所产生的报恩观念和忠诚思想,这种思想在战争时期强烈地影响了日本民族的群体行为,使日本全民族投入到了对战争的狂热支持之中,并出于对民族集团的忠诚意识而拒绝或淡化战后对战争的反省。 相似文献
59.
This paper reports on an evaluation of the Cornwall Young Carers project (jointly funded by social services and the Cornwall and Isles of Scilly Health Action Zone), conducted during the period 2000–2002. A diverse range of methodological approaches were adopted (comparative national statistics, local pilot study, monthly and quarterly data capturing instruments, and a service user focus group) in monitoring and evaluating the project's high level statements/outcomes. Four evaluative themes are discussed, namely: identification of young carers; assessment of young carers' needs; direct service provision; and partnership working. Recommendations and action steps are proposed with a view of informing future planning and service delivery, as well as developing an ethos of integrating evaluation into everyday practice for the Cornwall Young Carers Project. Overall, the project has made significant progress in meeting and exceeding its original targets. The fact that the project has been able to identify 202 new young carers over this period is a key milestone in demonstrating the critical need for the project's services. It is suggested that existing referrals are only the ‘tip of the iceberg’ for work with young carers in Cornwall. 相似文献
60.
赵旻 《山西高等学校社会科学学报》2006,18(5):62-64
在企业和员工之间,除了正式的、显性的聘任契约外,还存在着隐含的、非正式的、未公开说明的心理契约。面对许多行业引入市场机制后所带来的改制、竞争等严峻形势,存在于组织和组织成员之间的这种心理契约关系对激发和调动员工的积极性,增强组织凝聚力,实现组织成员的个人目标与组织目标的有机统一,保证企业快速、健康和高效的发展,必将起到积极的推动作用。 相似文献