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   100篇
  免费   4篇
各国政治   4篇
工人农民   5篇
世界政治   21篇
外交国际关系   5篇
法律   40篇
中国政治   1篇
政治理论   28篇
  2020年   3篇
  2019年   1篇
  2018年   6篇
  2017年   6篇
  2016年   3篇
  2015年   4篇
  2014年   5篇
  2013年   17篇
  2012年   1篇
  2011年   5篇
  2010年   1篇
  2009年   6篇
  2008年   7篇
  2007年   3篇
  2006年   5篇
  2005年   2篇
  2004年   4篇
  2003年   5篇
  2002年   3篇
  2001年   3篇
  1999年   2篇
  1998年   1篇
  1997年   2篇
  1996年   1篇
  1993年   1篇
  1992年   1篇
  1991年   1篇
  1989年   2篇
  1967年   2篇
  1966年   1篇
排序方式: 共有104条查询结果,搜索用时 15 毫秒
61.
62.
63.
64.
The path of gradual commercialization of current space applications, such as launch services, satellite communication services, direct broadcasting services, satellite remote sensing and navigation services, and satellite weather monitoring services, will most likely be followed by future activities of use of space resources. Ventures, like mining the natural resources of the Moon and asteroids, are likely to become technologically feasible in the near future. The question is what would be the most appropriate approach to address the future needs of exploitation of space resources: should it remain the exclusive province of state governments; should the private sector take over such space activities; or should a public-private partnership type of venture be encouraged? As state governments are becoming constrained by budget deficits, an increased reliance on private sector involvement in space activities involving the extraction and use of space resources is to be expected. When deciding whether to invest in commercial ventures of resource use exploitation, any potential private investor will be faced with the issues of economic costs, risks, and perceived regulatory barriers. This study argues that the perceived regulatory barriers, i.e., the licensing requirement, the “common heritage of mankind” principle of international space law, and protection of intellectual property rights, are not obstacles to economic development. Governments should provide both policy and regulatory incentives for private sector participation in the area of space natural resource use by funding basic research and development and by sponsoring liability insurance for private ventures among other incentives.  相似文献   
65.
This paper describes a sensitive UPLC-MS/MS method for quantification of methadone and 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine (EDDP) in single empty puparial case of Lucilia sericata. Larvae were reared on substrates spiked with different concentrations of methadone (0-4 μg/g). Methadone was quantified in puparia reared on high concentrated substrates (0.8-4 μg/g). The major metabolite of methadone (EDDP) was not detected, confirming rapid elimination of metabolites by the larvae before pupation. The effects of methadone on the development of L. sericata were also investigated. No effect on sex ratio was detected. A significant difference was calculated for emerged adults but no trends could be observed. Concerning the developmental curve, a significant difference was observed between control and high methadone concentrations using the Kolmogorov-Smirnov test.  相似文献   
66.
Idealism is the core of the Pratyabhijñã philosophy: the main goal of Utpaladeva (fl. c. 925–950 AD) and of his commentator Abhinavagupta (fl. c. 975–1025 AD) is to establish that nothing exists outside of consciousness. In the course of their demonstration, these ?aiva philosophers endeavour to distinguish their idealism from that of a rival system, the Buddhist Vijñānavāda. This article aims at examining the concept of otherness (paratva) as it is presented in the Pratyabhijñā philosophy in contrast with that of the Vijñānavādins’. Although, according to the Pratyabhijñā, the other subjects are not ultimately real since all subjects are nothing but limited manifestations of a single absolute subject, the fact that we are aware of their existence in the practical world has to be accounted for. The Vijñānavādins explain it by arguing the we infer the others’ existence. The Pratyabhijñā philosophers, while refuting their opponents’ reasoning as it is expounded in Dharmakīrti’s Santānāntarasiddhi, develop a particulary original analysis of our awareness of the others, stating that this awareness is neither a perception (pratyak?a) nor an inference (anumāna), but rather a guess (ūha) in which we sense the others’ freedom (svātantrya).  相似文献   
67.
A quantitative LC-MS/MS method has been developed for the simultaneous determination of 17 antipsychotic drugs in human postmortem brain tissue. Sample preparation was performed using Hybrid Solid Phase Extraction-Precipitation technology for the removal of endogenous protein and phospholipid interferences. The chromatographic separation was performed for 16 min on a C8 column, which used a gradient elution of formate ammonium and acetonitrile, and a flow rate gradient. Triple quadrupole mass spectrometry was employed to generate tandem mass spectrometric (MS/MS) data of the target analytes to select the ion m/z signals. Quantitation of the analytes was performed by operating in the dynamic multiple reaction monitoring (dMRM) mode using an electrospray ionization interface. Calibration curves prepared in the spiked brain tissue were linear in the range 20-8000 ng/g (r(2)>0.993) for all drugs (except olanzapine). Within- and between-day coefficients of variation were lower than 25% for all drugs at the LOQ. The LOQ in the matrix ranged between 2 ng/g and 80 ng/g. The method was successfully applied to the unequivocal identification and accurate quantification of antipsychotic drugs in human postmortem brain tissues: therefore, this method can be used in forensic investigations.  相似文献   
68.
We have analysed the information in 342 police reports of stranger sexual offences recorded in 2010. We have carried out a multiple correspondence analysis and a cluster analysis using modus operandi variables to identify differential profiles in these types of sexual offences. We have come up with three profiles of stranger sexual offences, which concur in the two techniques used. By analysing the personal variables of the offenders with such profiles, we have found differences in terms of the offender’s country of origin and age. We will discuss the consequences of these results on the police investigation of stranger sexual offences.  相似文献   
69.
This article explores the contingent nature of Zionist/Israeli understandings of Iranian Jewry, a particularly important “Oriental” (Mizrahi) group that has not yet received the attention it deserves in critical scholarship. Central to the Zionist project has been a juxtaposition of the opposition between East and West, on the one hand, and, on the other hand, between Exile and Land of Israel. These oppositions can be read as extreme expressions of the desire to assimiliate the Jews into the Western narrative of enlightenment and redemption. When applied to Iranian Jews, however, these oppositions become replete with tensions and ambiguities. First I show how, during the first three decades of the state of Israel, Israelis situated the Shah's modernization programs as part of the “West”, thereby removing Iranian Jewry from an “exilic” space. I then explore how the 1979 Iranian revolution further challenged these axiomatic oppositions. Iranian Jews living in Israel posed a serious challenge to Zionism's axiomatic assumptions. Nurturing a distinct ethnic (Mizrahi) identity within the Jewish state, they resisted the majoritarian and homogenizing tendencies of Israeli hegemony and demonstrated the fractured nature of Jewish identities.  相似文献   
70.
The literature on liability rules shows that the damage awards under a liability rule affect the efficiency of the rule. One crucial factor that could affect the damage awards and therefore the efficiency characteristics of liability rules is the error made by a court while estimating the harm suffered by the victims. In this paper efficiency property of what we label as 'simple' liability rules when courts make errors in estimation of the damage is studied in a unified framework. The paper provides a characterization of efficient simple liability rules and shows that the biased court errors act to change the efficiency characterization of simple liability rules. A necessary and sufficient condition for a simple liability rule to be efficient in the presence of upper-biased court errors is provided. The analysis is carried out in a quite general framework.  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