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   217篇
  免费   8篇
各国政治   13篇
工人农民   12篇
世界政治   18篇
外交国际关系   6篇
法律   118篇
中国政治   2篇
政治理论   42篇
综合类   14篇
  2021年   1篇
  2020年   4篇
  2019年   2篇
  2018年   8篇
  2017年   6篇
  2016年   7篇
  2015年   7篇
  2014年   6篇
  2013年   42篇
  2012年   10篇
  2011年   9篇
  2010年   4篇
  2009年   7篇
  2008年   6篇
  2007年   11篇
  2006年   11篇
  2005年   4篇
  2004年   9篇
  2003年   11篇
  2002年   9篇
  2001年   2篇
  2000年   5篇
  1999年   1篇
  1998年   2篇
  1997年   5篇
  1996年   4篇
  1995年   2篇
  1994年   1篇
  1993年   3篇
  1991年   2篇
  1990年   1篇
  1988年   1篇
  1986年   1篇
  1984年   1篇
  1983年   3篇
  1982年   1篇
  1981年   2篇
  1980年   1篇
  1979年   1篇
  1978年   1篇
  1977年   2篇
  1976年   2篇
  1975年   1篇
  1974年   1篇
  1972年   3篇
  1971年   1篇
  1966年   1篇
排序方式: 共有225条查询结果,搜索用时 0 毫秒
191.
192.
The aim of this paper is to highlight the main characteristics of what the authors call 'the economy of qualities'. The authors show that qualifying products and positioning goods are major concerns for agents evolving within the 'economy of qualities'. Competition in such an economy is structured through two basic mechanisms. The first is what the authors propose to call the process of singularization of products. The second is the mechanism whereby consumers are attached to, and detached from, goods that are proposed to them. At the heart of these logics, one can find multiple socio-technical devices that are designed by economic agents, which ensure the distribution of cognitive competencies, and which constantly and finely tune supply and demand. Relying upon Jean Gadrey's work, the authors claim that the economy of qualities is nowhere more effective than in services providing activities, and especially in those sectors that invest heavily in New Information and Communication Technologies (ICTs). Finally, the authors suggest that, in the economy of qualities, the functioning and the organization of markets are issues that are shared by scholars and actors. In these highly reflexive markets, a collaboration between them is needed.  相似文献   
193.
目次一、各国宪法司法中不同的抽象审查程度二、各国宪法司法的集中程度三、结论所谓宪法司法,即对国家所有行为包括立法行为、行政行为或司法行为等进行违宪司法审查。欧洲的宪法司法萌芽于19世纪下半叶。但无可否认的是,仅在诞生后的一个世纪,宪法司法方在欧洲得到显著发展。  相似文献   
194.
This study investigated the links between the preference for 4 rap music genres (American rap, French rap, hip hop/soul, and gangsta/hardcore rap) and 5 types of deviant behaviors in adolescence (violence, theft, street gangs, mild drug use, and hard drug use). The effects of peers' deviancy, violent media, and importance given to lyrics were statistically controlled. A self-report questionnaire was distributed to a sample of 348 bilingual French-Canadian adolescents (age: M = 15.32; SD = 0.9; 185 girls and 163 boys). Results indicated that rap music as a whole was linked to deviant behaviors, however the nature of the relation differed according to genres. Preference for French rap had the strongest links to deviant behaviors, whereas preference for hip hop/soul was linked to less deviant behaviors. Results are discussed within the psychosocial and sociocognitive perspectives on music influence in adolescence and also within the perspective of normative deviant behaviors in adolescence.  相似文献   
195.
Legal context. The application of antitrust law to assess settlementsof patent litigation raises difficult issues concerning theappropriate balance of patent law and competition policy. Recentprivate and public invocations of US antitrust law to challengesettlement agreements covering pharmaceutical patents have broughtthese issues to the forefront. The agreements share the commonfeature of an ‘exclusion payment’ from a brand-namedrug manufacturer (the patentee) to a generic drug manufacturer(the accused infringer) in exchange for a promise by the genericcompany to refrain from marketing its product for some time.US federal courts that have examined these agreements have variedin their approach and conclusions regarding the appropriateantitrust analysis to be applied to these settlements. Key points. This article argues that informed antitrust analysisof such agreements must take due note of the ‘probabilistic’nature of patent property rights. Practical significance. The article concludes that exclusionpayments fall outside the scope of a patent's exclusionary scopeand thus are subject to antitrust scrutiny. It demonstratesthat barring anticompetitive exclusion payments in settlementnegotiation prevents collusive bargains that harm consumer welfarewithout discouraging efficient settlements.  相似文献   
196.
We reported on the death by poisoning of a one-month-old baby that had followed the death of one of her sister (due to cyamemazine overdose). Exhumation of the corpse was done 8 months after burial and revealed the presence of amitriptyline. Parent drug and its metabolite were analysed by HPLC-MS/MS in positive ionisation mode on a C(18) analytical column using a gradient of acetonitrile and 2mM formate buffer at pH=3. Quantification is based on the main ion m/z=233, the common product ion of nortriptyline (MH(+), m/z 264), amitriptyline (MH(+), m/z 278) and nortriptyline D3 used as internal standard (MH(+), m/z 267). Amitriptyline and nortriptyline in the liver were measured at a concentration of 29.8 and 3.6 μg/g, respectively. Hair analyses revealed the presence of amitriptyline and nortriptyline at concentrations of 1811 and 43 pg/mg, respectively, while complementary analyses showed the presence of bromazepam in the hair at a concentration of 740 pg/mg, thus documenting previous administrations. The mother confessed later having used the drinkable form of the pharmaceutical LAROXYL(?) by pouring the content of a 20 ml bottle (at 40 mg/ml) into the feeding-bottle of her child. The milk was sweet but still bitter and following the testimony of a close relative, the whole family helped to feed the crying baby.  相似文献   
197.
Abstract: The few available studies on fetal age estimation concern very small samples, and statistical analysis is sometimes inadequate. In this survey, we used germs of deciduous teeth to estimate fetal age. Forty‐nine fetuses and 40 mandibles were scanned, and observations and measurements were made on DentaScan images. After checking their repeatability and reproducibility (analysis of variance), we defined thresholds using Fisher’s linear discriminant analysis to calculate the probability that a fetus was over or below a predefined age threshold. The forensic threshold which is of particular interest in France is 22 weeks amenorrhea. Relationships between fetal age and deciduous germ measurements were then sought by multiple linear regression. The thresholds gave very good results: 91.84% of good probability for the threshold of 22 weeks amenorrhea with no chance of error. The most precise age evaluation obtained nevertheless gave a range of ±4.6 weeks amenorrhea, so greater accuracy is still needed.  相似文献   
198.
199.
This paper addresses the suitability of ethyl glucuronide in hair (EtGH) strands other than 3cm for alcohol consumption. This issue will be addressed (a) by statistically comparing the distribution of EtGH results for 3cm hair strands to other hair strands analysed from 4126 cases and (b) by examining the stability of EtGH in an 8cm hair strand and two 12cm hair samples of two volunteers and a post-mortem case using 1cm segmental analysis. For 3464 driving license re-granting Medical and Psychological Assessment (MPA) cases, the detection of alcohol consumption using hair lengths longer than 3cm was never significantly less than for 3cm hair lengths, even up to 12cm hair lengths analysed non-segmented. For 662 non-MPA cases, where, in contrast to MPA cases, generally no abstinence was required, an increase in the EtGH positivity rate was observed with increasing hair length analysed up to 9cm, indicating that EtG-washout effects seem to play a minor role if any. For both MPA and non-MPA hair samples less than 3cm, a drastic, significant increase in the number of positive EtGH samples were observed, compared to 3cm hair lengths, strongly supportive of EtGH incorporation from sweat after a recent alcohol consumption. Segmental studies indicated that EtG is stable in the hair matrix up to 12cm long, hence supporting the above results. Even though both the statistical and the stability studies are preliminary results which need to be confirmed by other studies, they both provide evidence for the determination of alcohol consumption using EtGH in hair lengths longer than 3cm. Amendments to the Consensus of the Society of Hair Testing, the German driving license re-granting guidelines and EWDTS hair guidelines with respect to testing for abstinence and/or alcoholism are proposed for the benefit of the donors.  相似文献   
200.
Ethyl glucuronide (EtG) and fatty acid ethyl esters (FAEE), non-volatile, direct metabolites of ethanol have been shown to be suitable markers for the evaluation of social and chronic excessive alcohol consumption. Previous investigations have shown that the regular use of hair-care products with high alcohol content lead to an increase of FAEE concentration and consequently gave false-positive results for the determination of FAEE in hair. In this study we investigated the influence of a long-term hair treatment with EtOH containing lotion, on the EtG concentrations in hair. In this study 7 volunteer subjects (classified as either rare, social or heavy drinkers) treated the right side of their scalp every day during a one or two month period with a commercial hair tonic (Seborin), which contains 44.0% ethanol (vol%). Collection of hair specimens from both sides of the scalp was done one day before hair treatment, one week and one month after treatment (for 5 subjects also after two months of treatment). A hair segment of 3 centimeters (cm) was cut and then washed with water and acetone, and then pulverized. EtG was quantified by GC/MS after pulverization and 2h of ultrasonication in water, extraction by solid phase extraction using Oasis MAX columns and derivatization with HFBA. Measurements were done in negative chemical ionization mode using EtG-D5 as internal standard. Comparison of EtG concentration in the treated and in the non-treated hair specimens did not show any increase at the different dates of collection for the 7 subjects. In conclusion, these results show that there is no indication for an increase of EtG after use of ethanol containing hair cosmetics.  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