全文获取类型
收费全文 | 6251篇 |
免费 | 137篇 |
专业分类
各国政治 | 268篇 |
工人农民 | 260篇 |
世界政治 | 520篇 |
外交国际关系 | 220篇 |
法律 | 3796篇 |
中国政治 | 51篇 |
政治理论 | 1253篇 |
综合类 | 20篇 |
出版年
2021年 | 45篇 |
2020年 | 73篇 |
2019年 | 116篇 |
2018年 | 140篇 |
2017年 | 127篇 |
2016年 | 131篇 |
2015年 | 77篇 |
2014年 | 133篇 |
2013年 | 676篇 |
2012年 | 153篇 |
2011年 | 164篇 |
2010年 | 132篇 |
2009年 | 146篇 |
2008年 | 183篇 |
2007年 | 169篇 |
2006年 | 164篇 |
2005年 | 145篇 |
2004年 | 170篇 |
2003年 | 138篇 |
2002年 | 114篇 |
2001年 | 323篇 |
2000年 | 290篇 |
1999年 | 204篇 |
1998年 | 86篇 |
1997年 | 89篇 |
1996年 | 62篇 |
1995年 | 63篇 |
1994年 | 57篇 |
1993年 | 50篇 |
1992年 | 121篇 |
1991年 | 143篇 |
1990年 | 133篇 |
1989年 | 130篇 |
1988年 | 118篇 |
1987年 | 130篇 |
1986年 | 110篇 |
1985年 | 102篇 |
1984年 | 107篇 |
1983年 | 86篇 |
1982年 | 62篇 |
1981年 | 78篇 |
1980年 | 35篇 |
1979年 | 83篇 |
1978年 | 47篇 |
1976年 | 30篇 |
1975年 | 40篇 |
1974年 | 51篇 |
1973年 | 54篇 |
1972年 | 40篇 |
1971年 | 37篇 |
排序方式: 共有6388条查询结果,搜索用时 0 毫秒
961.
Nagy M Henke L Henke J Chatthopadhyay PK Völgyi A Zalán A Peterman O Bernasovská J Pamjav H 《Forensic science international》2007,169(1):19-26
Haplotype frequencies for 11 Y-STR markers (DYS19, DYS389I, DYS389II, DYS390, DYS391, DYS392, DYS393, DYS385, DYS437, DYS438 and DYS439) in a Romani population (n=63) from Slovakia, Jats of Haryana (n=84) and Jat Sikhs (n=80) from India were determined. The Slovakian Romani, the Haryana and Sikh populations were endogamous based on their unique haplotype ratio and haplotype diversity values, although the Sikh population appeared to be more diverse. AMOVA revealed non-significant differences between the Romanies and significant differences with non-Romani populations. The Macedonian Romani population differed from all Romani populations examined. Frequent haplotypes observed in Romani populations were sporadic in northwest Indian populations. Thirteen out of 316 populations worldwide were found to share the six most frequent haplotypes of the Slovakian Romanies when the screening conditions were narrowed based on the population size to be over 40, the occurrence of the haplotypes was more than one and the sum frequencies of the most frequent haplotypes was at least 0.02. The most common haplotypes were also observed in other Romani groups. When searching with two Indian (Malbar and Malaysian Indian) most frequent haplotypes under the same conditions matches could be detected in all Romani populations except for the Macedonian Romanies. The search with the Jat Sikhs and Jats of Haryana most frequent haplotypes resulted no matches in Romani populations. 相似文献
962.
Semenogelin (Sg), a protein originating in the seminal vesicles and a substrate for prostate specific antigen (PSA or p30), is a useful marker for the identification of semen. And detection of Sg has been available commercially in a membrane test recently. PSA is commonly used to detect semen in forensic significant samples taken from sexual assault cases. The strip PSA test has been available commercially from various manufacturers for many years. In this study, we evaluated two immunochromatographic membrane tests, one for Sg and the other for PSA by analyzing human semen, other human bodily fluids/materials including urine, blood, saliva, sweat, breast milk, vaginal secretion and fecal materials, semen from various animals and forensic casework samples. The data demonstrate that both Sg and PSA strip tests provide rapid and sensitive method for identification of seminal plasma. These results show that the immunochromatographic method for Sg detection is useful for the identification of seminal plasma in forensic samples, an alternative to the method for PSA detection. 相似文献
963.
Jackson SA Mammel MK Patel IR Mays T Albert TJ LeClerc JE Cebula TA 《Forensic science international》2007,168(2-3):183-199
Here, we describe a novel microarray-based approach for investigating the genomic diversity of Escherichia coli O157:H7 in a semi-high throughput manner using a high density, oligonucleotide-based microarray. This microarray, designed to detect polymorphisms at each of 60,000 base-pair (bp) positions within an E. coli genome, is composed of overlapping 29-mer oligonucleotides specific for 60 equally spaced, 1000-bp loci of the E. coli O157:H7 strain EDL933 chromosome. By use of a novel 12-well microarray that permitted the simultaneous investigation of 12 strains, the genomes of 44 individual isolates of E. coli O157:H7 were interrogated. These analyses revealed more than 150 single nucleotide polymorphisms (SNPs) and several deletions and amplifications in the test strains. Pyrosequencing was used to confirm the usefulness of the novel SNPs by determining their allelic frequency among a collection of diverse isolates of E. coli O157:H7. The tiling DNA microarray system would be useful for the tracking and identification of individual strains of E. coli O157:H7 needed for forensic investigations. 相似文献
964.
Cima M Merckelbach H Butt C Kremer K Knauer E Schellbach-Matties R 《Forensic science international》2007,168(2-3):143-147
The current article addresses the psychometric qualities of the German Version of Gudjonsson's Blame Attribution Inventory (GBAI), a self-report scale for measuring attribution of blame for crime. The GBAI was administered to a criminal sample of forensic and criminal inmates (n=107). Findings indicate that the German version of the Gudjonsson Blame Attribution Inventory possesses acceptable test-retest stability and good internal consistency. Factor analysis reproduced the three basic dimensions of the GBAI: external attribution, mental-element attribution, and guilt-feeling attribution. Forensic patients had higher mental-element attribution and guilt-feeling attribution scores than the prison inmates. Interestingly, sexual offenders who were prisoners, showed the lowest guilt-feeling attribution, while sexual offenders who were forensic patients had the highest guilt-feeling attribution scores. Since earlier research reported a tendency of faking good in sexual offenders, we suggest that the forensic sexual offenders may demonstrate a social desirable response tendency in an attempt to gain sympathy and/or earlier parole. All in all, our data show that the German version of the GBAI is a valuable tool for measuring attributional styles of offenders. 相似文献
965.
966.
This article addresses regulatory reforms in the Indian telecommunications sector and emphasizes the role of the Indian judiciary. Our claim is that when confronted with a series of disputes relating to the nascent telecom regulatory landscape, the Supreme Court of India sought to make a constructive contribution to both the actual disputes as well as the overall regulatory framework. Our reading of these cases suggests that in the sphere of telecom, the Supreme Court has been less interested in stamping its own authority on issues, and has instead sought to bolster the authority and legitimacy of the recently constituted telecom regulatory institutions. We seek to draw attention to the role of the Indian judiciary as marking an exceptional feature of evolving regulatory systems in the Global South. Conventional wisdom in the regulatory jurisprudence that has evolved in the Global North suggests that judiciaries should have little or no role to play in regulatory systems. We suggest that to overcome the special challenges that regulatory systems in the Global South confront, more established institutions and actors might have to lend credibility and legitimacy to enable nascent regulatory actors to develop over time. At least in the Indian case, this is one way to understand the Indian judiciary's interventionist actions in the sphere of telecom regulation. 相似文献
967.
Performance management techniques are presented as control mechanisms to save money and hold bureaucrats accountable, consistent with negative agency theory assumptions of bureaucrats. We propose an alternative theory of performance management that rests on prosocial values. This theory argues that public servants who see the social impact of their work are more likely to use performance metrics. We operationalize performance information use in terms of purposeful use for internal organizational means, and political use for external legitimation. Those who perceive that their work has a strong social impact are likely to pursue both types of uses, to improve both the effectiveness of their services, and to maintain resources. The data come from a cross‐sectional survey of U.S. public and nonprofit employees. 相似文献
968.
Charles K. Rowley 《Public Choice》2012,152(1-2):29-46
Gordon Tullock is one of the world’s leading economists. Even more so than Chicago’s Gary Becker, Tullock has extended the rational choice model into areas previously judged to lie outside the realm of economics. This essay identifies Tullock’s contributions to constitutional political economy, public choice, bureaucracy, the law, and bio-economics. The essay focuses attention most especially on Tullock’s pioneering contributions to public choice, including his twenty-year editorship of Public Choice. 相似文献
969.
Teresa K. Connor 《Journal of contemporary African studies : JCAS》2012,30(2):289-311
This paper aims to unpack the dynamics of displacement and the relationship of physical movement to elements of space (i.e. land) and place (or identity), in the Sundays River Valley, near the town of Kirkwood, in the Eastern Cape, South Africa. It primarily uses the motif of frontiers to cast light on displacement as an ongoing phenomenon and explore the different eras of occupation of land in the Sundays River Valley, from the early nineteenth century until 1970. It relates different layers of belonging and identity to the unfolding of capitalism and apartheid in South Africa. The article argues that ties to land are multiple, contested and based upon dispossession and physical movement rather than upon stability. While such a high degree of contestation of oral evidence in the Sundays River Valley might not give current claimants a detailed legal basis for restitution, it is an academically valuable idea to explore the origins of the inhabitants in the Sundays River Valley – because it can indicate the degree to which local identities are influenced by experiences of disruption and displacement. The paper argues that frontier relationships in the SRV are central in the formation of larger systems of relationships of race and class, and that this casts new light on displacement (both as a historical event and a contemporary experience), in the formation of identity and place in southern Africa. 相似文献
970.
Newell AJ Morgan RM Griffin LD Bull PA Marshall JR Graham G 《Journal of forensic sciences》2012,57(5):1285-1289
Quartz sand surface texture analysis has been automated for the first time for forensic application. The derived Basic Image Features (BIFs) provide computer-generated texture recognition from preexisting data sets. The technique was applied to two distinct classification problems; first, the ability of the system to discriminate between (quartz) sand grains with upturned plate features (indicative of eolian, global sand sea environments) and grains that do not exhibit these features. A success rate of grain classification of 98.8% was achieved. Second, to test the ability of the computer recognition system to identify specific energy levels of formation of the upturned plate surface texture features. Such recognition ability has to date been beyond manual geological interpretation. The discrimination performance was enhanced to an exact classification success rate of 81%. The enhanced potential for routine forensic investigation of the provenance of common quartz sand is indicated. 相似文献