首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   11832篇
  免费   442篇
各国政治   712篇
工人农民   397篇
世界政治   1078篇
外交国际关系   640篇
法律   6210篇
中国政治   86篇
政治理论   3029篇
综合类   122篇
  2021年   73篇
  2020年   154篇
  2019年   204篇
  2018年   329篇
  2017年   315篇
  2016年   379篇
  2015年   236篇
  2014年   261篇
  2013年   1575篇
  2012年   313篇
  2011年   322篇
  2010年   291篇
  2009年   299篇
  2008年   347篇
  2007年   382篇
  2006年   379篇
  2005年   332篇
  2004年   334篇
  2003年   313篇
  2002年   301篇
  2001年   315篇
  2000年   271篇
  1999年   262篇
  1998年   178篇
  1997年   174篇
  1996年   136篇
  1995年   137篇
  1994年   139篇
  1993年   155篇
  1992年   179篇
  1991年   206篇
  1990年   185篇
  1989年   191篇
  1988年   188篇
  1987年   188篇
  1986年   184篇
  1985年   182篇
  1984年   171篇
  1983年   167篇
  1982年   128篇
  1981年   124篇
  1980年   105篇
  1979年   113篇
  1978年   93篇
  1977年   73篇
  1976年   79篇
  1975年   75篇
  1974年   98篇
  1973年   76篇
  1969年   65篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Professional baseball players are often thought of as making multi-million-dollar salaries, but most professional baseball players have recently made under $15,000 a year. Minor league players toiled under an onerous system resulting from baseball's judicially created antitrust exemption and lobbying efforts that exempted them from minimum wage and overtime. These factors allowed teams to impose a uniform player contract (UPC) on players with numerous unconscionable provisions for years. However, a late-night Tweet in August of 2022 sent shockwaves through the sports and labor world, announcing that the Major League Baseball Players Association (MLBPA) was sending out authorization cards to represent minor league players. After years of fighting to maintain the authority to impose conditions on minor league players, through lobbying and litigation, Major League Baseball (MLB) turned over a new leaf and recognized the unionization of minor league players under the MLBPA less than three weeks later. In light of this long sought-after recognition, this article takes a novel approach. First, it provides historical context for baseball's unique ability to impose working conditions on minor leaguers without significant concern for legal ramifications. Second, it provides an overview of the doctrine of contractual unconscionability and analyzes the prior UPC as an unconscionable agreement. Finally, it details the historic unionization process and makes detailed recommendations to ameliorate the unconscionable conditions minor league players have faced when they negotiate with MLB owners to draft their initial collective bargaining agreement.  相似文献   
2.
ABSTRACT

Like many Republican presidential candidates before him, Donald J. Trump campaigned on a pro-business, anti-regulation platform, and since his election in November 2016, he has directed his administration to move forward with deregulation in many arenas, including consumer financial protections, environmental controls, and workplace safety among others. Past efforts to roll back regulations governing certain industries, such as the savings and loan and the mortgage industries, have had harmful consequences for the general public or for specific interest groups. In this study, we review what the Trump administration has accomplished with regard to deregulation to date. Then, based on past deregulatory fiascos, we theorize the harmful collateral consequences that may result from this most recent swing of the regulatory-deregulatory pendulum.  相似文献   
3.
ABSTRACT

Reflecting on the results presented in articles in this special issue, European leaders should take greater account of external perceptions in crafting the European Union's strategic narrative and guiding its actions. Failure to do so has impaired external policies like the Euro-Mediterranean Partnership, the European Neighbourhood Policy and Eastern Partnership. Leaders emerging from the Arab uprisings perceived the EU as complicit with their countries’ former anciens régimes and Russian leaders see EU support for democracy and the market economy in former Soviet states as duplicitous and instrusive. Awareness of such perceptions should be filtered into EU decision-making, without validating views that European officials and diplomats consider misleading.  相似文献   
4.
This article analyses the implementation of European case law at the bureaucratic frontline of European member states. Theoretically, insights from street‐level implementation studies are combined with judicial impact research. Empirically, we compare how EU rules on free movement and cross‐border welfare are applied in practice in Denmark, Austria and France. We find that when applying EU rules in practice, street‐level bureaucrats are confronted with a world of legal complexity, consisting of ambiguous rules, underspecified concepts and a recent judicial turn by the Court of Justice of the European Union. In order to manage complexity, street‐level bureaucrats turn to their more immediate superiors for guidance. As a consequence, domestic signals shape the practical application of EU law. Despite bureaucratic discretion and many country differences, domestic signals create uniform, restrictive outcomes of EU law in all three cases. Thus we show that there is considerable room for politics in EU implementation processes.  相似文献   
5.
This study describes the performance of handheld Raman devices for determining whether suspect pharmaceutical tablets declared to contain controlled substances were consistent with authentic (CWA) or not consistent with authentic (NCWA) tablets using a simple, rapid, field-friendly method capable of being used by nonexperts. Twenty-five authentic products and 84 known NCWA tablets were examined using three “parent” devices for a total of 327 analyses. On average, the parent devices yielded a true pass rate of 100%, a true fail rate of 98.4%, a false pass rate of 1.6%, and a false fail rate of 0%. The methods/libraries were then transferred to 13 identical “daughter” devices, which were used to examine 10 suspect finished dosage forms in duplicate (six known NCWA tablets and four authentic tablets) for a total of 260 measurements. On average, the daughter devices had a true pass rate of 100%, a true fail rate of 95.5%, a false pass rate of 4.5%, and a false fail rate of 0.0%. These data demonstrate that the parent–daughter electronic transfer method was successful, which permits the ability to develop methods in the laboratory that can be seamlessly pushed out to field devices. The methods can then be used to (i) prioritize samples for additional testing using other more time-consuming laboratory-based techniques needed to detect and quantify active ingredients and (ii) help support the interdiction of dangerous tablets at ports of entry, thereby preventing them from reaching the supply chain.  相似文献   
6.
An important component of crime scene reconstruction is bloodstain pattern analysis (BPA). Where BPA concerns impact patterns, estimating the area of origin is critical information for scene reconstruction. Traditionally, this is achieved by measuring individual bloodstains and performing trigonometric calculations; however, 3D scanning has been proposed as a viable alternative for overcoming logistical and practical concerns with the manual method. Therefore, this project aimed to establish whether the FARO Focus 3D scanner and FARO Zone 3D software can improve the accuracy of area of origin estimates relative to the manual method. We created a series of eight bloodstain impact patterns and performed paired analysis using the two methods to estimate areas of origin for each pattern. Our data suggested that FARO-derived estimates were generally more accurate than using the manual method. FARO-estimated heights of origin areas were generally closer to the true distance. Both methods underestimated the distance from the wall for most patterns originating 150mm or greater from the wall, but overestimated distances for patterns originating closer to the wall. The degree to which distances were underestimated increased significantly the further the blood source was from the wall and was greater for FARO-derived estimates. The results of this research contribute to the validation of these instruments for operational implementation for BPA and should be considered alongside the practical benefits of 3D scanning relative to manual methods. Further, 3D scanning can provide reliable BPA reconstruction documentation for technical review and court presentation.  相似文献   
7.
How large a benefit is partisan control of the redistricting process? Do legal constraints on redistricting—such as the preclearance requirement of the Voting Rights Act—alter this benefit? Are institutions designed to reduce the benefit to partisan control—such as redistricting commissions—effective? To measure the effects of partisan districting on the electoral fortunes of the parties, we collect data on the partisan composition of state government, House election outcomes, and moderating institutions over an 80-year period. Our results suggest that over time, both parties have benefited from unified control, with the effects largest in states where voters were evenly divided among the parties and smallest in states where the controlling party had a large advantage in the electorate. The effects have changed over time, with both parties having equally benefited from control during the middle of the 20th century, the benefit largely disappearing in the late part of the century, and the Republican Party seeing a moderate advantage from control in the current century. The benefits of partisan control were not diminished in states with redistricting commissions. The preclearance requirement appears to have hurt the Democratic Party except when its vote share was very low. The aggregate effects of partisan redistricting are moderate in magnitude—in the modern period, this effect has typically been less than 10 House seats, with the last election where control of the House would have flipped in expectation occurring in 1954.  相似文献   
8.
A simple, quick, selective, sensitive, and effective field-friendly method capable of being used by nonexperts has been developed for detecting mitragynine in Mitragyna speciosa (kratom) using surface-enhanced Raman spectroscopy (SERS). Over 100 samples and blanks (known to be either positive or negative for the presence of mitragynine) were examined in duplicate using five identical handheld Raman spectrometers, which provided a data set of over 1,000 examinations. Based on the results of these analyses, the method yielded a true-positive rate of 99.3%, a true-negative rate of 97.9%, a false-positive rate of 2.1%, and a false-negative rate of 0.7%. The average minimum detectable concentration (Cm) of mitragynine that reproducibly yielded a match for one of the library spectra on all five instruments was determined to be 342 ng/mL (ppb). This Cm value is a conservative estimate considering that the extraction process was not fully optimized by this study, which was not necessary since the Cm value achieved was well below typical mitragynine concentrations in kratom (1.3–2.3%). The method is ideal (i) for prioritizing samples for additional testing using other more time-consuming laboratory-based techniques needed to detect and quantify mitragynine and (ii) for field use at international mail facility (IMF) satellite laboratories to help interdict kratom and prevent this dangerous product from reaching the U.S. supply chain.  相似文献   
9.
Brexit and the coronavirus pandemic have put relationships between the UK government and its devolved counterparts under growing strain. Tensions generated by both of these developments have exposed the inadequacies of the existing, under-developed system for bringing governments together in the UK. The limitations of the current system include the ad hoc nature of intergovernmental meetings, and their consultative rather than decision-making character. Drawing upon an analysis of how intergovernmental relationships are structured in five other countries, the authors offer a number of suggestions for the reconfiguration of the UK model. They explore different ways of enabling joint decision making by its governments, and argue against the assumption that England can be represented adequately by the UK administration. Without a serious attempt to address this dysfunctional part of the UK’s territorial constitution, there is every prospect that relations between these different governments will continue to deteriorate.  相似文献   
10.
As the emergence of nongovernmental conservation efforts generates conflict among various stakeholders, the causal story that each party articulates regarding conservation and the causes of land degradation reflects their unique interests. This study uses existing literature to evaluate causal stories surrounding a contemporary conservation effort: Montana's American Prairie Reserve. Through qualitative review of web‐based documents and newspaper articles, it generates a preliminary account of key stakeholders' causal stories. The case study suggests that parties who might be disadvantaged by ascribing responsibility for environmental harms in an adversarial fashion may instead elect to articulate causal stories that are more neutral than existing approaches might forecast. The study concludes by suggesting that further development of causal story literature may enable it to better address contemporary conservation efforts.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号