全文获取类型
收费全文 | 1556篇 |
免费 | 64篇 |
专业分类
各国政治 | 43篇 |
工人农民 | 52篇 |
世界政治 | 34篇 |
外交国际关系 | 58篇 |
法律 | 605篇 |
中国共产党 | 86篇 |
中国政治 | 235篇 |
政治理论 | 96篇 |
综合类 | 411篇 |
出版年
2024年 | 2篇 |
2023年 | 18篇 |
2022年 | 21篇 |
2021年 | 17篇 |
2020年 | 32篇 |
2019年 | 25篇 |
2018年 | 13篇 |
2017年 | 35篇 |
2016年 | 32篇 |
2015年 | 25篇 |
2014年 | 81篇 |
2013年 | 130篇 |
2012年 | 97篇 |
2011年 | 105篇 |
2010年 | 82篇 |
2009年 | 121篇 |
2008年 | 124篇 |
2007年 | 143篇 |
2006年 | 149篇 |
2005年 | 86篇 |
2004年 | 84篇 |
2003年 | 60篇 |
2002年 | 51篇 |
2001年 | 45篇 |
2000年 | 17篇 |
1999年 | 6篇 |
1998年 | 3篇 |
1997年 | 4篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1984年 | 2篇 |
排序方式: 共有1620条查询结果,搜索用时 109 毫秒
181.
POPULATION: Population: Illinois Caucasian ( n =117), Illinois African American ( n =218), and Illinois Hispanic ( n =68). 相似文献
182.
183.
184.
185.
从市场角度把握农业产业化 总被引:1,自引:0,他引:1
易文彬 《中共南昌市委党校学报》2005,3(1):57-60
农业产业化是中国农业市场化改革的必然结果,也是农业发展的希望所在。从市场角度探讨农业产业化的进程和模式,可以更清楚地认识到,农业产业化的实质就是农业市场化。把握这一点,有助于深入了解农业产业化对农村发展的影响和作用,推动农业沿着市场化、产业化、现代化的道路逐步发展,最终从根本上解决“三农”问题。 相似文献
186.
Rib histological age estimation requires the evaluation of the middle third of the sixth rib. Human ribs have thin cortices and, when recovered, are often fragmented or absent, making it difficult to identify a specific midthoracic rib. This research explores the amount of microstructure variation in the middle third of the midthoracic ribs and determines whether the sixth rib age prediction equation can be applied to non-sixth ribs with similar accuracy. The amount of variability must be evaluated in order to meet the criterion for evidentiary examination. The sample consists of 120 cortical bone cross-sections from the middle third of ribs 3-8 removed from 20 cadavers. For each rib, osteon population densities (OPDs) and associated age estimates were calculated. The results demonstrate that non-sixth ribs can provide similar OPD values compared with those of the sixth ribs; however, individual variation proved to be significantly associated with bias, suggesting that individual factors influence the magnitude and direction of bias in non-sixth rib OPD values. This demonstrates the importance of evaluating multiple cross-sections (both intra- and inter-rib) to estimate age due to the normal remodeling variation within individuals. 相似文献
187.
The mobility of university inventors in Europe 总被引:1,自引:0,他引:1
188.
Roger Svensson 《The Journal of Technology Transfer》2007,32(5):545-559
In recent years, development agencies (DAs) have focused their activities on consulting projects rather than on financing
turnkey projects when assisting emerging markets. The main reason is that the implementation of consulting projects is likely
to be connected with an intensive knowledge transfer from developed to emerging markets. Training of local employees and cooperation
with local firms are necessary elements to make the transfer effective. The empirical statistics shows training and cooperation
to be more frequent in consulting projects financed by DAs as compared to commercial projects. According to theory and experience,
training should be included in projects in the least developed host countries, whereas local cooperation should be more frequent,
the higher is the development level of the host country. However, DAs do not follow these rules of thumb in a convincing way.
A policy implication of the paper is therefore that DAs should better organize and plan the contents of their consulting projects.
相似文献
Roger SvenssonEmail: |
189.
Craig Dowden Craig Bennell Sarah Bloomfield 《Journal of Police and Criminal Psychology》2007,22(1):44-56
Despite the immense popularity of offender profiling as both a topic of fascination for the general public as well as an academic
field of study, concerns have been raised about the development of this area of scientific inquiry. The present study provides
a preliminary step towards moving the field forward as it reviews the type and quality of studies dealing with offender profiling
over the past 31 years. Based on a content analysis of 132 published articles, the review indicates that researchers investigating
this phenomenon rarely publish multiple articles, and they are generally reported across many different journals, thereby
making knowledge synthesis and knowledge transfer problematic. In addition, the majority of papers published in the area are
discussion pieces (e.g., discussing what profiling is, how profiles are constructed, and when profiling is useful), despite
the fact that the processes underlying offender profiling are still not well understood. Finally, although peer-reviewed articles
exploring this topic have steadily increased, the statistical sophistication of these studies is sorely lacking, with most
including no statistics or formal analyses of data. Suggestions for future research and recommendations to streamline efforts
in this field are provided based on the results of this review.
相似文献
Craig BennellEmail: |
190.
We describe two short amplicon autosomal short tandem repeat (miniSTR) quadruplex systems for eight loci D1S1171, D2S1242, D3S1545, D4S2366, D12S391, D16S3253, D20S161, and D21S1437, unlinked from the combined DNA index system (non-CODIS) loci, using newly designed primer sets. The results of an assay of 411 Japanese individuals showed that polymerase chain reaction (PCR) products within the eight loci were less than 150bp in size, without the seven additional bases for adenylation. The frequency distributions in the loci showed no deviations from Hardy-Weinberg equilibrium expectations. The accumulated power of discrimination and power of exclusion for the eight loci were 0.9999999991 and 0.998, respectively. For assay of highly degraded DNA, including artificially degraded samples and the degraded forensic casework samples assessed with the present miniSTR quadruplex systems, the systems proved quite effective in analyzing degraded DNA. 相似文献