全文获取类型
收费全文 | 411篇 |
免费 | 18篇 |
专业分类
各国政治 | 24篇 |
工人农民 | 56篇 |
世界政治 | 31篇 |
外交国际关系 | 18篇 |
法律 | 216篇 |
中国政治 | 4篇 |
政治理论 | 79篇 |
综合类 | 1篇 |
出版年
2023年 | 3篇 |
2022年 | 2篇 |
2021年 | 9篇 |
2020年 | 8篇 |
2019年 | 13篇 |
2018年 | 17篇 |
2017年 | 16篇 |
2016年 | 20篇 |
2015年 | 13篇 |
2014年 | 18篇 |
2013年 | 59篇 |
2012年 | 16篇 |
2011年 | 11篇 |
2010年 | 16篇 |
2009年 | 18篇 |
2008年 | 18篇 |
2007年 | 16篇 |
2006年 | 8篇 |
2005年 | 14篇 |
2004年 | 14篇 |
2003年 | 14篇 |
2002年 | 10篇 |
2001年 | 5篇 |
2000年 | 12篇 |
1999年 | 4篇 |
1998年 | 5篇 |
1997年 | 11篇 |
1996年 | 5篇 |
1995年 | 7篇 |
1994年 | 1篇 |
1993年 | 3篇 |
1992年 | 2篇 |
1990年 | 5篇 |
1989年 | 5篇 |
1988年 | 2篇 |
1987年 | 5篇 |
1986年 | 1篇 |
1985年 | 7篇 |
1984年 | 3篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1980年 | 4篇 |
1979年 | 1篇 |
1977年 | 2篇 |
1974年 | 1篇 |
1968年 | 1篇 |
排序方式: 共有429条查询结果,搜索用时 15 毫秒
331.
Patent law encourages the development and transfer of technology by making the information regarding new inventions public knowledge, while providing the inventor with the right to exclude others from making, using or selling the invention for 20 years. Because the exclusive rights to the invention are limited in time, and to prevent the inventor from gaining additional time, the application for a patent must be filed within a statutorily prescribed time. Recently, the U.S. Supreme Court in the case of Pfaff v. Wells Electronics, Inc. clarified one aspect related to the timing of the patent application. This article specifically examines the Pfaff case and the question of when an invention subject to a contract to sell exists as it relates to the timing of patent applications. 相似文献
332.
333.
Scholars have argued that economic efficiency requires a clear definition of the rights of ownership, contract, and transfer of land. Ambiguity in the definition or enforcement of any of these rights leads to an increase in transaction costs in the exchange and transfer of land as well as a residual uncertainty after any land contract. In Kenya, government efforts at establishing clearly defined property rights and adjudication mechanisms have been plagued by the existence of alternative processes for the adjudication of disputes. Customary dispute resolution has been praised as an inexpensive alternative to official judicial processes in a legally pluralistic environment. However, our research demonstrates that customary processes may also carry a monetary cost that puts them beyond the means of many citizens. This article compares the costs and processes of the formal and informal methods of property rights adjudication for women in the Kisii region of Kenya. The research results suggest that women have weak property rights overall, they have limited access to formal dispute resolution systems because of costs involved, and even the informal systems of conflict resolution are beyond the means of many citizens. 相似文献
334.
Sandra J. Kaplan Suzanne R. Sunday Victor Labruna David Pelcovitz Suzanne Salzinger 《Journal of family violence》2009,24(5):273-281
Psychiatric disorders of 142 parents of adolescents who were documented as physically abused during adolescence and 168 parents
of non-abused comparison adolescents were assessed. Fathers and mothers of physically abused adolescents exhibited higher
rates of Axis I diagnoses and co-occurring disorders, and had more impaired GAS scores than comparison parents. Fathers of
abused adolescents had greater lifetime incidence of Conduct Disorder and Substance Abuse/Dependence than comparison fathers.
Mothers of abused adolescents had more unipolar depressive disorders than comparison mothers. This study highlights the importance
of mental health assessments and interventions for parents of physically abused adolescents. Since onsets of parental psychiatric
disorders antedated the abuse, early recognition and treatment of parental disorders may contribute to prevention of the onset
and/or reoccurrence of adolescent physical abuse.
相似文献
Sandra J. KaplanEmail: |
335.
Puente Kayla Starr Christine R. Eccles Jacquelynne S. Simpkins Sandra D. 《Journal of youth and adolescence》2021,50(12):2394-2411
Journal of Youth and Adolescence - Though adolescents’ science identity beliefs predict positive STEM outcomes, researchers have yet to examine developmental differences within racial/ethnic... 相似文献
336.
Sandra V. Constantin 《Nora, Nordic Journal of Women's Studies》2018,26(4):278-294
ABSTRACTBased on a mixed-methods research design, this article explores young adults’ work trajectories. The findings presented in this article are based on retrospective longitudinal data collected in Beijing between September 2012 and August 2014. It is argued that, in China, neoliberal ideology has been mobilized in conjunction with a neo-familialist discourse which emphasizes the central role of women within Chinese families. Once married, women are compelled to embody “traditional” Chinese values. Although the country has a high level of female labour-market participation, in post-socialist China, the public discourse on family tends to reassign women to their roles as wives and mothers above their role as workers. Women are also more at risk than men of encountering vulnerabilities in their employment trajectories. Since the opening-up to a market economy and the individualization of labour relations, the market ideology has imposed itself and deepened socio-economic inequalities and social stratification. As the collectivist welfare system has not yet found a solid substitute able to provide social protection for the whole population, the family, and especially women, are asked to take on part of this role. 相似文献
337.
Sandra Leon 《Regional & Federal Studies》2017,27(5):645-665
ABSTRACTThis paper reviews the most important characteristics and of the Spanish Intergovernmental Councils (IGCs) and theorizes about the effect of the increasing fragmentation of the party system on the nature and dynamics of multilateral bargaining in IGCs. The essential argument is that party system fragmentation may have an impact on IGCs through its effect on the formation of minority and coalition governments. These types of governments may put an end to the two-bloc confrontation, bring to the system higher levels of party congruence between levels of government and lower the costs of compromise, three factors that may help to grease the bargaining process and, in turn, enhance the achievement of intergovernmental cooperation agreements. The positive effect will be conditional on several factors, namely the ideological coherence of inter-party alliances, the predominant type of government in the system (coalition or single-party minority) and the duration of governments. 相似文献
338.
Sandra Lavenex 《国际公共行政管理杂志》2017,40(14):1186-1196
ABSTRACTThis article retraces the mutual rapprochement between Policy Analysis and International Relations and addresses its limits. Looking beyond the circle of advanced liberal-democratic economies, three limits are discussed: the need to specify the prerequisites of different modes of governance; to consider the relations of power and domination in these processes; and to look beyond regulatory issues at the political and societal conflicts surrounding policy diffusion. 相似文献
339.
Research on adolescent depression has overwhelmingly focused on risk factors, such as stressful negative events and cognitive vulnerabilities, but much important information can be gained by focusing on protective factors. Thus, the current study aimed to broaden understanding on adolescent depression by considering the role of two positive elements as protective factors, attributional style for positive events and self-esteem, in a model of depression. The sample included 491 middle school students (52 % female; n = 249) with an age range from 12 to 15 years (M = 13.2, SD = .70). The sample was ethnically/racially diverse, with 55 % White, 22 % Hispanic, 10 % Asian American, 3 % African American, and 10 % Biracial/Other. Correlational analyses indicated significant cross-sectional and longitudinal associations between an enhancing attributional style (internal, stable, global attributions for positive events), self-esteem and depressive symptoms. Further, prospective analyses using bootstrapping methodology demonstrated significant indirect effects of an enhancing attributional style on decreases in depressive symptoms through its effects on self-esteem. These findings highlight the importance of considering attributional style for positive events as a protective factor in the developmental course of depressive symptoms during early adolescence. 相似文献
340.
Jennifer W. Kaminski Richard W. Puddy Diane M. Hall Sandra Y. Cashman Alexander E. Crosby LaVonne A. G. Ortega 《Journal of youth and adolescence》2010,39(5):460-473
Previous research has linked greater social connectedness with a lowered risk of self-directed violence among adolescents.
However, few studies have analyzed the comparative strength of different domains of connectedness (e.g., family, peers and
school) to determine where limited resources might best be focused. Data to address that gap were taken from the Centers for
Disease Control and Prevention’s Student Health and Safety Survey, administered to 4,131 7th–12th graders (51.5% female; 43.8%
Hispanic; 22.6% African American or Black). Logistic regressions (controlling for age, gender, race/ethnicity, family structure,
academic performance, and depressive symptoms) suggest that family connectedness was a stronger predictor than connectedness
to peers, school, or adults at school for non-suicidal self-harm, suicidal ideation, suicide plans, and non-fatal suicidal
behavior. In some analyses, peer connectedness was unexpectedly a risk factor. Results have implications for prevention of
suicide in adolescence, especially in the context of the current trend towards school-based prevention programs. 相似文献