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   418篇
  免费   17篇
各国政治   34篇
工人农民   83篇
世界政治   16篇
外交国际关系   21篇
法律   206篇
中国政治   3篇
政治理论   72篇
  2023年   2篇
  2021年   1篇
  2020年   13篇
  2019年   17篇
  2018年   19篇
  2017年   20篇
  2016年   17篇
  2015年   11篇
  2014年   18篇
  2013年   54篇
  2012年   16篇
  2011年   20篇
  2010年   10篇
  2009年   20篇
  2008年   18篇
  2007年   9篇
  2006年   9篇
  2005年   9篇
  2004年   17篇
  2003年   10篇
  2002年   16篇
  2001年   2篇
  2000年   2篇
  1999年   9篇
  1998年   4篇
  1997年   3篇
  1996年   7篇
  1995年   5篇
  1994年   6篇
  1993年   9篇
  1992年   4篇
  1991年   3篇
  1990年   2篇
  1989年   3篇
  1988年   6篇
  1987年   4篇
  1986年   4篇
  1985年   5篇
  1984年   4篇
  1983年   6篇
  1982年   3篇
  1981年   4篇
  1978年   1篇
  1976年   2篇
  1975年   4篇
  1972年   2篇
  1970年   1篇
  1969年   1篇
  1968年   1篇
  1965年   1篇
排序方式: 共有435条查询结果,搜索用时 15 毫秒
411.
412.
Ruth B. Dixon 《Society》1970,8(1-2):44-49
  相似文献   
413.
Shifts are apparent in the spatial distribution of disadvantage in Australia since the 1970s. Not only are new sites of disadvantage emerging (small rural towns, manufacturing centres, coastal welfare regions, some outer suburbs), but research suggests a possible spatial cleavage between best-accessed Melbourne and Sydney, and 'the rest' of the country. At the same time, examples of provision and delivery of services continue to occur locally andregionally that demonstrate lack of attention to the characteristics of the places in which those services are received. The paper calls for spatially conscious public policy in service delivery, and considers the possibilities of this occurring if governments form partnerships with other organisations to provide services for communities.  相似文献   
414.
415.
416.
Abstract:  Recycled document paper was microwave digested in a solution of HNO3 and H2O2 prior to analysis by inductively coupled plasma mass spectrometry (ICP-MS) to determine the trace elemental concentrations within the paper. Undigested particulate material was observed and subsequently characterized as a mixture of kaolin (clay) and TiO2 by Fourier transform infrared spectroscopy and X-ray diffraction spectroscopy. The effect of the particulate material on the elemental concentrations was then investigated. Paper samples were completely digested in hydrofluoric acid (HF) and element concentrations determined in the HF and HNO3/H2O digests were statistically compared using Student's t -test (95% confidence limit). Statistical differences in element concentrations between the two digests were observed for only four elements and there was no evidence of element adsorption by the particulate material. Hence, the HNO3/H2O2 digestion proved sufficient to digest paper for ICP-MS analysis, eliminating the need to use the hazardous and corrosive HF matrix.  相似文献   
417.
Zusammenfassung  Eine Verletzung der Belange von Natur und Landschaft ist in der Vergangenheit bei immissionsschutzrechtlichen Genehmigungen nur in Ausnahmef?llen durch die Verwaltungsgerichte überprüft worden. Weder gelten diese Belange als drittschützend, noch zielen die bisherigen naturschutzrechtlichen Verbandsklagen prim?r auf immissionsschutzrechtliche Genehmigungen. Im Umweltrechtsbehelfsgesetz (UmwRG) hat der deutsche Gesetzgeber die Klagerechte der Verb?nde an eine Verletzung subjektiver Rechte gekoppelt und damit ebenfalls die Geltendmachung von Naturschutzbelangen ausgeschlossen. Durch den Vorlagebeschluss des OVG Münster vom 5. M?rz 2009 im Verfahren gegen das Steinkohlekraftwerk Lünen ist nun der EuGH aufgefordert, sich dazu zu ?u?ern, ob das deutsche Recht den Vorgaben des Gemeinschaftsrechts entspricht.  相似文献   
418.
Abstract: Five diesel samples were analyzed by gas chromatography–mass spectrometry (GC‐MS) using six GC temperature programs, aiming to investigate the effect of temperature program on association and discrimination of the samples. Temperature programs varied by ramp rate and incorporated one‐ or two‐step temperature ramps. Pearson product moment correlation coefficients and principal components analysis were used to evaluate differences in discrimination among the diesel samples afforded by each temperature program, based on the total ion chromatogram (TIC) and selected extracted ion profiles (EIPs). Association of diesel replicates and discrimination among samples based on the TIC and aromatic EIP were similar for all temperature programs based on scores plots. The alkane EIP was not useful in discriminating samples regardless of temperature program, because of similar alkane content of the diesel samples. The association and discrimination of diesel samples was largely unaffected by temperature programs that incorporated one‐ or two‐step temperature ramps.  相似文献   
419.
Abstract: Blowfly larvae and porcine tissue contaminated with gunshot residue (GSR) were collected during summer and winter months, over a 37‐day and a 60‐day sampling period, respectively. Wound samples were microwave‐digested and analyzed by inductively coupled plasma mass spectrometry (ICP‐MS) for the detection of antimony, barium, and lead. During summer, the 37‐day sampling period encompassed all stages of decomposition, except skeletonization. The three elements were detected in larvae only on days 3 and 4 after death but were detected at significant levels in tissue samples throughout the entire sampling period. In winter, no significant decomposition was observed throughout the 60‐day sampling. Although temperatures were too low for blowfly activity, the three elements were detected in the tissue samples at relatively constant, significant levels. Hence, GSR determination in tissue was more dependent on decomposition stage rather than time since death.  相似文献   
420.
This article argues that the Health and Social Care Act 2008 (Regulated Activities) Regulations 2014 are fatally flawed notwithstanding the apparent rigour of the process which produced them. These Regulations were the product of considerable deliberation following a sensitively executed public inquiry yet, it is argued, they rely too heavily on the rhetoric of criminal law while failing to take into account the competing norms for compliance and the impact of NHS budget constraints. Further, they push the CQC towards a heavy‐handed deterrence approach to enforcement, which will increase hostility between regulatees and the inspectorate, and ultimately reduce the scope for developing the transparency about failures which is sorely needed in the NHS. This article challenges the contemporary wisdom that it is primarily knee‐jerk regulatory responses that suffer from fatal flaws of this nature.  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