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   485篇
  免费   28篇
各国政治   38篇
工人农民   31篇
世界政治   49篇
外交国际关系   37篇
法律   210篇
中国政治   1篇
政治理论   140篇
综合类   7篇
  2023年   2篇
  2022年   3篇
  2021年   5篇
  2020年   7篇
  2019年   12篇
  2018年   15篇
  2017年   23篇
  2016年   22篇
  2015年   27篇
  2014年   17篇
  2013年   82篇
  2012年   14篇
  2011年   26篇
  2010年   12篇
  2009年   30篇
  2008年   28篇
  2007年   26篇
  2006年   23篇
  2005年   20篇
  2004年   12篇
  2003年   13篇
  2002年   14篇
  2001年   7篇
  2000年   8篇
  1999年   4篇
  1998年   4篇
  1997年   8篇
  1996年   2篇
  1995年   2篇
  1992年   7篇
  1991年   2篇
  1990年   3篇
  1989年   3篇
  1988年   2篇
  1987年   1篇
  1986年   2篇
  1985年   3篇
  1984年   1篇
  1983年   2篇
  1982年   2篇
  1981年   2篇
  1980年   1篇
  1979年   2篇
  1978年   1篇
  1977年   4篇
  1975年   1篇
  1973年   1篇
  1971年   1篇
  1968年   1篇
  1966年   1篇
排序方式: 共有513条查询结果,搜索用时 15 毫秒
41.
Forensic analysis of glass samples was performed in different laboratories within the NITE-CRIME (Natural Isotopes and Trace Elements in Criminalistics and Environmental Forensics) European Network, using a variety of Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) systems. The main objective of the interlaboratory tests was to cross-validate the different combinations of laser ablation systems with different ICP-MS instruments. A first study using widely available samples, such as the NIST SRM 610 and NIST SRM 612 reference glasses, led to deviations in the determined concentrations for trace elements amongst the laboratories up to 60%. Extensive discussion among the laboratories and the production of new glass reference standards (FGS 1 and FGS 2) established an improved analytical protocol, which was tested on a well-characterized float glass sample (FG 10-1 from the BKA Wiesbaden collection). Subsequently, interlaboratory tests produced improved results for nearly all elements with a deviation of < 10%, demonstrating that LA-ICP-MS can deliver absolute quantitative measurements on major, minor and trace elements in float glass samples for forensic and other purposes.  相似文献   
42.
Scanning electron microscopy analysis of experimental bone hacking trauma   总被引:2,自引:0,他引:2  
The authors report on their macro- and microscopy study of bone lesions made by a sharp force instrument (a single blade knife), and a sharp-blunt instrument classified as a chopping weapon (a hatchet). The aim of this work was to attempt to identify the instrument by analyzing the general class characteristics of the cuts. Each weapon was used on human bones. The results indicate that macroscopic analysis is more problematic. The microscopic analysis assessed that characteristics examined were effective in distinguishing sharp from sharp-blunt injury to the bone. The microscope facilitates analysis unachievable with macroscopic methods, some three-dimensional characteristics not visible to the naked eye being clearly defined with its use. Emphasis has been placed on the value of SEM as an anthropologist's tool in bone lesion injuries.  相似文献   
43.
Some juveniles who engage in sexual offenses may have a paraphilia, a psychiatric disorder characterized by a pervasive pattern of deviant and impairing sexual fantasies, thoughts, and/or behaviors. Though there is no known cure for these conditions, paraphilias can be effectively managed using a multimodal treatment approach. This may include the use of psychotherapeutic and pharmacological treatment interventions, including antiandrogen medications. One such agent, leuprolide acetate (leuprolide), a luteinizing hormone-releasing-hormone agonist, has been shown to be effective in reducing paraphilic symptoms in adult patients. To date, however, there is no published data on its use and effectiveness in adolescent and young adult paraphilic patients. This study consists of a case report series of six young adult patients treated with leuprolide. All subjects had been diagnosed with at least one paraphilia (i.e., Pedophilia, Sexual Sadism, Frotteurism, and Paraphilia Not Otherwise Specified). All subjects had been refractory to treatment in a residential program for adolescent sex offenders prior to initiation of leuprolide. All six subjects reported a reduction in sexually deviant symptoms following treatment with leuprolide. Clinicians rated four as much improved and two as moderately improved. The treatment was well tolerated in all six subjects. This preliminary case series supports the conclusion that leuprolide deserves further examination as a potentially safe and effective component in the treatment of young adult patients with paraphilia.  相似文献   
44.
This article examines the way in which administrative courts and the National Ombudsman in the Netherlands seek to control administrative action, and is aimed at developing a heuristic model that can also be useful in a wider context. Two styles of control will be introduced: "coercive" and "cooperative." An exploratory empirical study was conducted of two administrative agencies, investigating the implementation process of court and ombudsman decisions. This article argues that it is likely that the policy impact of the courts and the ombudsman is directly related to their style of control. More empirical research is needed to evaluate this hypothesis.  相似文献   
45.
A rapid and sensitive method using LC-MS/MS triple stage quadrupole for the determination of traces of amphetamine (AP), methamphetamine (MA), 3,4-methylenedioxyamphetamine (MDA), 3,4-methylenedioxymethamphetamine (MDMA, “ecstasy”), 3,4-methylenedioxyethamphetamine (MDEA), and N-methyl-1-(3,4-methylenedioxyphenyl)-2-butanamine (MBDB) in hair, blood and urine has been developed and validated. Chromatography was carried out on an Uptisphere ODB C18 5 μm, 2.1 mm × 150 mm column (Interchim, France) with a gradient of acetonitrile and formate 2 mM pH 3.0 buffer. Urine and blood were extracted with Toxitube A® (Varian, France). Segmented scalp hair was treated by incubation 15 min at 80 °C in NaOH 1 M before liquid–liquid extraction with hexane/ethyl acetate (2/1, v/v). The limits of quantification (LOQ) in blood and urine were at 0.1 ng/mL for all analytes. In hair, LOQ was <5 pg/mg for MA, MDMA, MDEA and MBDB, at 14.7 pg/mg for AP and 15.7 pg/mg for MDA. Calibration curves were linear in the range 0.1–50 ng/mL in blood and urine; in the range 5–500 pg/mg for MA, MDMA, MDEA and MBDB, and 20–500 pg/mg for AP and MDA. Inter-day precisions were <13% for all analytes in all matrices. Accuracy was <20% in blood and urine at 1 and 50 ng/mL and <10% in hair at 20 and 250 pg/mg. This method was applied to the determination of MDMA in a forensic case of single administration of ecstasy to a 16-year-old female without her knowledge during a party. She suffered from hyperactivity, sweating and agitation. A first sample of urine was collected a few hours after (T + 12 h) and tested positive to amphetamines by immunoassay by a clinical laboratory. Blood and urine were sampled for forensic purposes at day 8 (D + 8) and scalp hair at day 60 (D + 60). No MDMA was detected in blood, but urine and hair were tested positive, respectively at 0.42 ng/mL and at 22 pg/mg in hair only in the segment corresponding to the period of the offence, while no MDA was detectable. This method allows the detection of MDMA up to 8 days in urine after single intake.  相似文献   
46.
47.
Recent developments in German corporate governance   总被引:1,自引:0,他引:1  
This paper provides an overview of the German corporate governance system. We review the governance role of large shareholders, creditors, the product market and the supervisory board. We also discuss the importance of mergers and acquisitions, the market in block trades, and the lack of a hostile takeover market. Given that Germany is often referred to as a bank-based economy, we pay particular attention to the role of the universal banks (Hausbanken). We show that the German system is characterised by a market for partial corporate control, large shareholders and bank/creditor monitoring, a two-tier (management and supervisory) board with co-determination between shareholders and employees on the supervisory board, a disciplinary product–market, and corporate governance regulation largely based on EU directives but with deep roots in the German codes and legal doctrine. Another important feature of the German system is its corporate governance efficiency criterion which is focused on the maximisation of stakeholder value rather than shareholder value. However, the German corporate governance system has experienced many important changes over the last decade. First, the relationship between ownership or control concentration and profitability has changed over time. Second, the pay-for-performance relation is influenced by large shareholder control: in firms with controlling blockholders and when a universal bank is simultaneously an equity- and debtholder, the pay-for-performance relation is lower than in widely held firms or blockholder-controlled firms. Third, since 1995 several major regulatory initiatives (including voluntary codes) have increased transparency and accountability.  相似文献   
48.
49.
50.
Book Reviews     
Books reviewed:
The Law of Energy for Sustainable Development , edited by Adrian J. Bradbrook, Rosemary Lyster, Richard Ottinger and Wang Xi , published by Cambridge University Press, 2005, 630pp, £75.00, hardback.
Fresh Water and International Economic Law , edited by Edith Brown Weiss, Laurence Boisson de Chazournes and Nathalie Bernasconi-Osterwalder , published by Oxford University Press, 2005, 506pp, £70.00, hardback.
Handbook of Global Environmental Politics , edited by Peter Dauvergne , published by Edward Elgar, 2005, 560pp, £125.00, hardback.
Emerging Forces in Environmental Governance , edited by Norichika Kanie and Peter M. Haas , published by United Nations University Press, 2004, 320pp, US$36.00, paperback.
Economic Globalization and Compliance with International Environmental Agreements edited by Alexandre Kiss, Dinah Shelton and Kanami Ishibashi , published by Kluwer Law International, 2003, 352pp, £85.00, hardback.
German Environmental Law for Practitioners , edited by Horst Schlemminger and Claus-Peter Martens , 2nd edition, published by Kluwer Law International, 2004, 833pp, £119.25, hardback.
The International Climate Change Regime: A Guide to Rules, Institutions and Procedures , Farhana Yamin and Joanna Depledge , published by Cambridge University Press, 2004, 730pp, £40.00, paperback.  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