全文获取类型
收费全文 | 1244篇 |
免费 | 55篇 |
专业分类
各国政治 | 70篇 |
工人农民 | 78篇 |
世界政治 | 100篇 |
外交国际关系 | 94篇 |
法律 | 648篇 |
中国共产党 | 1篇 |
中国政治 | 18篇 |
政治理论 | 289篇 |
综合类 | 1篇 |
出版年
2023年 | 13篇 |
2022年 | 16篇 |
2021年 | 39篇 |
2020年 | 47篇 |
2019年 | 56篇 |
2018年 | 55篇 |
2017年 | 58篇 |
2016年 | 60篇 |
2015年 | 47篇 |
2014年 | 55篇 |
2013年 | 199篇 |
2012年 | 55篇 |
2011年 | 52篇 |
2010年 | 31篇 |
2009年 | 44篇 |
2008年 | 40篇 |
2007年 | 65篇 |
2006年 | 36篇 |
2005年 | 23篇 |
2004年 | 34篇 |
2003年 | 28篇 |
2002年 | 27篇 |
2001年 | 21篇 |
2000年 | 22篇 |
1999年 | 12篇 |
1998年 | 9篇 |
1997年 | 11篇 |
1996年 | 14篇 |
1995年 | 14篇 |
1994年 | 9篇 |
1993年 | 10篇 |
1992年 | 12篇 |
1991年 | 10篇 |
1990年 | 9篇 |
1989年 | 8篇 |
1988年 | 7篇 |
1987年 | 5篇 |
1985年 | 3篇 |
1984年 | 9篇 |
1983年 | 4篇 |
1982年 | 3篇 |
1981年 | 2篇 |
1980年 | 2篇 |
1979年 | 4篇 |
1978年 | 3篇 |
1977年 | 4篇 |
1970年 | 2篇 |
1969年 | 3篇 |
1967年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有1299条查询结果,搜索用时 46 毫秒
941.
Marianne van de Steeg 《West European politics》2013,36(2):426-427
Territorial autonomy is one aspect of power-sharing in multi-ethnic societies. Nevertheless, the multi-ethnic countries of Central and Eastern Europe are still among the most centralised in the European Union. This article analyses the failure of any attempts to establish (symmetric) federalism or (asymmetric) autonomy, creating self-governed regions by the Hungarian minorities in Romania and Slovakia. The analysis focuses on the positions of the main parties of the ethnic majorities and the Hungarian minority parties in the two countries. In both cases, the parties representing the Hungarian minorities have favoured territorial autonomy along ethnic lines, but this demand has been rejected by the parties of the ethnic majority. Against the historical legacy of unstable borders, the parties of the ethnic majority argue that territorial autonomy or federalisation might be a first step for a revisionist agenda and separatism. Instead, supported by the European integration, the parties have been able to agree on decentralisation as a half-hearted compromise. 相似文献
942.
943.
944.
A highly sensitive screening method based on high performance liquid chromatography atmospheric pressure ionization mass spectrometry (HPLC-API-MS) has been developed for the analysis of 21 nitroaromatic, nitramine and nitrate ester explosives, which include the explosives most commonly encountered in forensic science. Two atmospheric pressure ionization (API) methods, atmospheric pressure chemical ionization (APCI) and electrospray ionization (ESI), and various experimental conditions have been applied to allow for the detection of all 21 explosive compounds. The limit of detection (LOD) in the full-scan mode has been found to be 0.012-1.2 ng on column for the screening of most explosives investigated. For nitrobenzene, an LOD of 10 ng was found with the APCI method in the negative mode. Although the detection of nitrobenzene, 2-, 3-, and 4-nitrotoluene is hindered by the difficult ionization of these compounds, we have found that by forming an adduct with glycine, LOD values in the range of 3-16 ng on column can be achieved. Compared with previous screening methods with thermospray ionization, the API method has distinct advantages, including simplicity and stability of the method applied, an extended screening range and a low detection limit for the explosives studied. 相似文献
945.
Meijerman L Sholl S De Conti F Giacon M van der Lugt C Drusini A Vanezis P Maat G 《Forensic science international》2004,140(1):91-99
The FearID research project is aimed at the individualisation of earprints for the purpose of forensic research. The study presented here was carried out within the framework of this project. It intends to combine a review of what is known from literature on the classification and individualisation of earprints with results from a preliminary study of earprints. Possibilities for, and limitations to, the use of earprints in forensic investigation are addressed. Differences between eliminating a suspect, placing a suspect at a crime scene, and linking crimes by prints left at different scenes are considered. 相似文献
946.
The authors report on three cases of myiasis which rarely occurs in the civilized world. Poor social conditions, old age, alcoholism, diabetes and vascular occlusive disease were predisposing co-factors. All three victims showed large necrotizing skin ulcerations, but in no case a generalized infection had developed. Therefore the probable benefit from the maggot infestation concerning these ulcerating skin lesions is discussed. For centuries clinicians have observed that maggots provide debridement of necrotic wounds particularly in Military Medicine. With the advent of antibiotics their therapeutic use declined. Recently "biosurgery" (syn. maggot or larval therapy) again became a promising tool for therapy of infected, necrotizing skin-ulcerations. Besides wound debridement marked anti-microbial activity and secretion of proteolytic enzymes could be detected. Maggot debridement is an valuable and cost-effective treatment option for patients with nonhealing wounds. 相似文献
947.
Extraction of human nuclear DNA from feces samples using the QIAamp DNA Stool Mini Kit 总被引:2,自引:0,他引:2
The use of a QIAamp DNA Stool Mini Kit (QIAGEN) for extracting human nuclear DNA from feces samples is reported. This method employs a stool lysis buffer and a unique matrix (InhibitEX tablet) to remove PCR inhibitory substances specific to feces samples. DNA extracted from various amounts of stool and from stool samples exposed to different environmental impacts was successfully amplified and typed using the Profiler Plus Amplification Kit and ABI PRISM 310 Genetic Analyser. 相似文献
948.
van Praag HM 《危机》2002,23(2):77-82
Over the past decades the rate of completed suicide has remained quite stable, whereas that of suicide attempts seems to have increased (to the extent it has been studied in defined regions). These are puzzling observations, since depression is the major suicide precursor and and since antidepressants have been increasingly used over the years in the treatment of depression. These observations have not attracted sufficient attention, possibly because they do not accord with consensus opinions about depression treatment in psychiatry today. This paper discusses a number of possible explanations that not only deserve, but are definitely in need of systematic investigation. 相似文献
949.
Gelder van Hans 《The Journal of Technology Transfer》1990,15(1-2):61-66
ELAIN is an automation project for the processing of export-license applications by the Bureau of Export Administration of the Department of Commerce (DOC). The project is unusual in that it was implemented by administrators without going through normal approval channels. The relationships between the change agent and the agency participants can best be described by Havelock's diffusion-adoption model, which depicts the execution as a one-way relationship from sender to receiver. The more complex models that were examined do not apply because this project was inauguated and furthered by bureaucrats, as opposed to the more usual participation of political appointees. The ELAIN system uses commercial valueadded telecommunications vendors to trasfer the information between the exporters and DOC. Industry used its own funds to develop the necessary special features, with repayment possible only if exporters used their sevices, paying fees for this convenience. No precedent for this type of arrangement was found, hence it is considered to be a social invention as well as an innovation. 相似文献
950.