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   836篇
  免费   23篇
各国政治   53篇
工人农民   56篇
世界政治   71篇
外交国际关系   40篇
法律   418篇
中国政治   6篇
政治理论   204篇
综合类   11篇
  2020年   4篇
  2019年   9篇
  2018年   17篇
  2017年   21篇
  2016年   17篇
  2015年   21篇
  2014年   11篇
  2013年   124篇
  2012年   22篇
  2011年   30篇
  2010年   18篇
  2009年   27篇
  2008年   23篇
  2007年   20篇
  2006年   24篇
  2005年   21篇
  2004年   19篇
  2003年   23篇
  2002年   23篇
  2001年   15篇
  2000年   8篇
  1999年   10篇
  1998年   10篇
  1997年   17篇
  1996年   10篇
  1995年   19篇
  1994年   14篇
  1993年   16篇
  1992年   14篇
  1991年   19篇
  1990年   5篇
  1989年   15篇
  1988年   12篇
  1987年   13篇
  1986年   17篇
  1985年   16篇
  1984年   18篇
  1983年   15篇
  1982年   13篇
  1981年   16篇
  1980年   15篇
  1979年   11篇
  1978年   9篇
  1977年   6篇
  1976年   13篇
  1975年   9篇
  1974年   7篇
  1973年   9篇
  1971年   2篇
  1967年   2篇
排序方式: 共有859条查询结果,搜索用时 15 毫秒
201.
Electronic control devices (ECDs) may eventually be deployed by the military in a manner resulting in longer exposures than those encountered during law-enforcement operations. In a previous study, 18 repeated cycling (5-second on/5-second off) exposures (within a 3-minute period) of anesthetized swine to an ECD (TASER International's Advanced TASER X26 device) resulted in leg muscle contraction, acidosis, and increases in blood electrolytes. In the current study, experiments were performed to examine effects of exposures to a different cycling rate (7-second on/3-second off), from a modified X26 ECD, on 10 swine (Sus scrofa), maintained on propofol anesthesia. In contrast with the previous study, a large number of animals (6/10) died immediately after the exposures. There were no major differences in pre-exposure blood factors from survivors versus nonsurvivors, with the exception of hematocrit and 2 isoenzymes of lactate dehydrogenase. It is doubtful that these factors would be useful in predicting survival after ECD exposure. Blood pH was significantly decreased after exposure, but (in animals that survived) subsequently returned to baseline levels. On the basis of the overall survival rate, further development of useful ECDs (for long-term incapacitation during military operations) may require consideration of longer pauses between repeated exposures over a 3-minute period.  相似文献   
202.
We tested the accuracy of thermal imaging as a lie detection tool in airport screening. Fifty-one passengers in an international airport departure hall told the truth or lied about their forthcoming trip in an interview. Their skin temperature was recorded via a thermal imaging camera. Liars’ skin temperature rose significantly during the interview, whereas truth tellers’ skin temperature remained constant. On the basis of these different patterns, 64% of truth tellers and 69% of liars were classified correctly. The interviewers made veracity judgements independently from the thermal recordings. The interviewers outperformed the thermal recordings and classified 72% of truth tellers and 77% of liars correctly. Accuracy rates based on the combination of thermal imaging scores and interviewers’ judgements were the same as accuracy rates based on interviewers’ judgements alone. Implications of the findings for the suitability of thermal imaging as a lie detection tool in airports are discussed.  相似文献   
203.
Research has recently begun to identify an overlap of involvement in offending and victimization and a shared commonality of risk factors for both outcomes. Despite this growing body of evidence, this research has yet to have been extended to dating violence in general and in cross cultural samples specifically. Recognizing these gaps in the literature, the current study examines the correlation between psychological and physical dating violence perpetration and victimization among a large sample of South Korean college students. Results from a series of bivariate probit models suggest that there is a strong degree of overlap between dating violence perpetration and victimization and that social learning theory and self-control theory cannot explain away the overlap. Study limitations and implications are also discussed.  相似文献   
204.
Ronald Wintrobe 《Public Choice》2012,152(1-2):115-130
In this paper I first briefly survey Tullock’s contributions to the study of autocracy and coups d’etat. Tullock’s analysis of the coup d’etat is insightful. He suggested that those at the top could control those at the bottom with a proper system of incentive payments. Here I expand on that idea by asking the reverse question, not what keeps those at the bottom from rebelling, but what keeps those at the top from looting the regime? I begin by noting that shareholders of the modern widely held corporation face a similar problem: what keeps the CEO from looting the company when the market for corporate control is flawed, shareholders are too weak to exercise discipline, and the board is in the CEO’s pocket? I suggest the answer is provided by “internal governance”: the old need the young for good performance. I explain the financial crisis of 2008 as in part the result of the failure of this mechanism. I also explain the success of modern China this way: The Communist Party facilitates growth because its structure provides a way for superiors (the “old”) to trade with subordinates (the “young”). I have also expanded on Tullock’s analysis to ask what conditions might prevent the dictator from implementing his solution to the coup d’etat problem, thus explaining why coups d’etats actually occur. The basic reason is the weakness of the state. Japanese history provides two interesting illustrations of this: first the Tokugawa regime, where the people were over-controlled, and second, the Meiji constitution, implemented after the fall of the Tokugawa state. The Japanese problem after Meiji was that the military (the young) had no incentive to offer their loyalty to the old (the civilian regime), so the young acted on their own. The problem was the reverse of the Tokugawa regime’s: the Meiji constitution left the bottom with too much control over the top. There was no formal coup d’etat but a number of coup attempts were made and de facto the military increasingly constituted a state within a state. This reversal of authority apparently continued down the chain of command, ultimately with tragic consequences, most notably the invasion of Pearl Harbor.  相似文献   
205.
In 1979, Miller and Patel showed that a solution containing two diacetylene monomers, 2,4-hexadiyne-1,6-bis(phenylurethane) (HDDPU) and 2,4-hexadiyne-1,6-bis(p-chlorophenylurethane) (HDDCPU) could be used to develop latent fingermarks on a non-porous surface. In the current work, the same mixture (HDDPU:HDDCPU=10:1, in acetone solution) was used to develop fingermarks on a wide variety of surfaces, both non-porous and porous, including paper. An airbrush system was optimized for the application of the reagent solution. Once the solution evaporates on a surface, the monomers co-crystallize in different ways, depending upon a number of factors, including the surface residue. "Active" co-crystallization leads (with heat or radiation) to the formation of purple polymer, while "inactive" crystallization results in a non-polymerizable white deposit. Fingermark contrast was achieved as a result of active co-crystallization (giving purple polymer) in either the ridges or the furrows, depending upon the surface and other factors. A general observation (supported by spot tests with linseed oil, salt and amino acid solutions) was that on paper, oily materials are more likely to lead to the formation of the purple polymer, while the presence of water inhibits polymerization. However, these observations are not consistent across all other substrates. It is hypothesized that water disrupts hydrogen bonding between diacetylene molecules, and thus prevents the topochemical polymerization of the diacetylenes, which occurs in the solid state between favourably aligned monomers. An interesting observation was the development of fingermarks deposited on paper that had already been treated with the diacetylene reagent.  相似文献   
206.
LUCIO-Direct-enzyme linked immunosorbent assay (ELISA) tests were validated for the screening of drugs of abuse cannabis, opiates, amphetamines and cocaine in urine for the new German medical and psychological assessment (MPA) guidelines with subsequent gas chromatographic-mass spectrometric (GC-MS) confirmation. The screening cut-offs corresponding to 10 ng/mL 11-nor-delta-9-tetrahydrocannabinol-9-carboxylic acid (THC-COOH), 50 ng/mL amphetamine, 25 ng/mL morphine and codeine and 30 ng/mL benzoylecgonine were chosen at the point where the number of false negatives was lower than 1%. Due to their accuracy, ease of use and rapid analysis, these ELISA tests are very promising for cases where a large proportion of the tests are expected to be negative such as for abstinence monitoring as part of the driving licence re-granting process.  相似文献   
207.
We tested the accuracy of Scientific Content Analysis (SCAN), a verbal lie detection tool that is used world-wide by federal law enforcement and military agencies. Sixty-one participants were requested to write down the truth, an outright lie or a concealment lie about activities they had just completed. The statements were coded with SCAN and with another verbal lie detection tool, Reality Monitoring (RM). RM discriminated significantly between truth tellers and outright liars and between truth tellers and concealment liars, whereas SCAN did not discriminate between truth tellers and either kind of liar. Implications of the findings for the suitability of SCAN as a lie detection tool are discussed.  相似文献   
208.
Past research has documented the positive association between parental hostility and offspring involvement in intimate partner violence. Researchers, practitioners, and parents typically adopt the standpoint that parental warmth may counter these negative lessons. However, Straus and colleagues argue that parents foster IPV to the extent that they teach their child that verbal and physical aggression are a normal and legitimate component of loving relationships. A strict interpretation of social learning theory would suggest that these lessons are more, not less, likely to occur when parental hostility is interspersed with displays of affection. The present study tests this idea using data from 2,088 undergraduate students from a large university in the Southeast. Consistent with Straus' arguments, findings suggest that, rather than attenuating the negative effects of hostility, supportive interactions seem to amplify the probability that offspring will emulate aggressive behaviors in their own romantic relationships. The same is true for the effects of harsh parenting for women. It seems that the best way parents can avoid contributing to their child's chances of being in a violent dating relationship is to eschew family interaction involving verbal and physical aggression.  相似文献   
209.

Students of comparative military organizations have advanced three hypotheses to explain when armed forces adopt more liberal manpower policies: when a major security threat looms, when the military professionalizes, or when the surrounding society grows more tolerant of difference. This article argues that all three are theoretically and empirically problematic: they potentially have much to contribute, but only in conjunction with a perspective that is more appreciative of the centrality of political processes. Enduring reform of the military's participation policies is more productively viewed through the lens of the struggle over national and communal identity. To illustrate the power of this alternative approach, this article reconsiders cases commonly cited in support of the existing hypotheses: the racial desegregation of the U.S. military, the integration of the Druze into the Israel Defense Forces, and the imperial and independent Indian armies' policies with respect to what the British termed “class.”  相似文献   
210.
Weihaiwei     
Japan is an international giant in economic and industrial terms but remains an insular nation in some other respects, perhaps as a result of a tendency towards requiring its politicians to build a high level of consensus on issues where attitudes and opinions are strongly polarised. The Liberal Democratic Party returned to power in the December 2012 general election, committed to kick-starting the economy with more aggressive spending and monetary policies; there is also speculation that it may prove a more nationalistic government at a time of greater tension in the Japan/China relationship, although so far it is pursuing pragmatism rather than confrontation  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