全文获取类型
收费全文 | 4778篇 |
免费 | 171篇 |
国内免费 | 5篇 |
专业分类
各国政治 | 313篇 |
工人农民 | 135篇 |
世界政治 | 422篇 |
外交国际关系 | 310篇 |
法律 | 1869篇 |
中国共产党 | 14篇 |
中国政治 | 478篇 |
政治理论 | 1318篇 |
综合类 | 95篇 |
出版年
2021年 | 29篇 |
2020年 | 45篇 |
2019年 | 70篇 |
2018年 | 109篇 |
2017年 | 117篇 |
2016年 | 114篇 |
2015年 | 80篇 |
2014年 | 100篇 |
2013年 | 762篇 |
2012年 | 182篇 |
2011年 | 361篇 |
2010年 | 252篇 |
2009年 | 219篇 |
2008年 | 216篇 |
2007年 | 129篇 |
2006年 | 143篇 |
2005年 | 146篇 |
2004年 | 140篇 |
2003年 | 103篇 |
2002年 | 120篇 |
2001年 | 86篇 |
2000年 | 97篇 |
1999年 | 71篇 |
1998年 | 63篇 |
1997年 | 72篇 |
1996年 | 48篇 |
1995年 | 56篇 |
1994年 | 65篇 |
1993年 | 59篇 |
1992年 | 47篇 |
1991年 | 64篇 |
1990年 | 41篇 |
1989年 | 58篇 |
1988年 | 35篇 |
1987年 | 42篇 |
1986年 | 40篇 |
1985年 | 44篇 |
1984年 | 32篇 |
1983年 | 45篇 |
1982年 | 42篇 |
1981年 | 51篇 |
1980年 | 39篇 |
1979年 | 44篇 |
1978年 | 39篇 |
1977年 | 20篇 |
1976年 | 32篇 |
1975年 | 20篇 |
1974年 | 21篇 |
1973年 | 21篇 |
1969年 | 17篇 |
排序方式: 共有4954条查询结果,搜索用时 15 毫秒
941.
942.
Jason B. West Ph.D. Janet M. Hurley M.S. James R. Ehleringer Ph.D. 《Journal of forensic sciences》2009,54(1):84-89
Abstract: There remains significant uncertainty in illicit marijuana cultivation. We analyzed the δ13C and δ15N of 508 domestic samples from known U.S.A. counties, 31 seized from a single location, 5 samples grown in Mexico and Colombia, and 10 northwest border seizures. For a subset, inflorescences and leaves were analyzed separately. These data revealed a strong correspondence, with inflorescences having slightly higher δ13C and δ15N values than leaves. A framework for interpreting these results is introduced and evaluated. Samples identified as outdoor‐grown by δ13C were generally recorded as such by the Drug Enforcement Administration (DEA). DEA‐classified indoor‐grown samples had the most negative δ13C values, consistent with indoor cultivation, although many were also in the outdoor‐grown domain. δ15N indicated a wide range of fertilizers across the dataset. Samples seized at the single location suggested multiple sources. Northwest border δ13C values suggested indoor growth, whereas for the Mexican and Colombian samples they indicated outdoor growth. 相似文献
943.
Abstract: We examined the characteristics of subway train‐related fatalities in New York City between Jan. 1, 2003 and May 31, 2007 in order to determine which factors are useful in differentiating accident from suicide. Subway train‐related deaths with homicide and undetermined manners also are included. During this period, there were 211 subway train‐related fatalities. The manners of death were: suicide (n = 111), accident (n = 76), undetermined (n = 20), and homicide (n = 4). The causes of death were blunt trauma (n = 206) and electrocution (n = 5). Torso transection and extremity amputation were more frequent in suicides. Antidepressant medications were more frequently detected in suicides, whereas cocaine and ethanol were more frequent in accidents. However, autopsy findings should be weighed in the context of the entire evaluation along with other circumstantial and investigative findings. In unwitnessed deaths where additional information is unavailable or discrepant, the most appropriate manner of death usually is undetermined. 相似文献
944.
Vitacco MJ Van Rybroek GJ Rogstad JE Yahr LE Tomony JD Saewert E 《Law and human behavior》2009,33(4):308-319
Accurately predicting inpatient aggression is an important endeavor. The current study investigated inpatient aggression over
a six-month time period in a sample of 152 male forensic patients. We assessed constructs of psychopathy, anger, and active
symptoms of mental illness and tested their ability to predict reactive and instrumental aggression. Across all levels of
analyses, anger and active symptoms of mental illness predicted reactive aggression. Traits of psychopathy, which demonstrated
no relationship to reactive aggression, were a robust predictor of instrumental aggression. This study (a) reestablishes psychopathy
as a clinically useful construct in predicting inpatient instrumental aggression, (b) provides some validation for the reactive/instrumental
aggression paradigm in forensic inpatients, and (c) makes recommendations for integrating risk assessment results into treatment
interventions.
相似文献
Michael J. VitaccoEmail: |
945.
We examined the association between psychopathy, assessed using the Hare Psychopathy Checklist-Revised: Screening Version
(Hart et al., Manual for the psychopathy checklist screening version (PCL:SV), 1995), and stalking in 61 men convicted of
stalking-related offenses. Psychopathic symptoms were rare, but their presence—especially that of affective deficit symptoms—was
associated with victimization of casual acquaintances and with several risk factors from the Guidelines for Stalking Assessment and Management (SAM) (Kropp et al., Guidelines for stalking assessment and management, 2008a), including stalking in violation of supervision
orders, degree of preoccupation with victims, and targeting of victims with limited access to external resources. The findings
suggest that in spite of their rarity, psychopathic traits may be important in the assessment and management of stalking risk.
相似文献
Stephen D. HartEmail: |
946.
James 《Computer Law & Security Report》2009,25(4):367-371
Computer-implemented inventions feature in almost every field of technology, and although improvements to computer-based devices are routinely made in software, the circumstances in which patent protection is available remains unclear. The patentability of software varies considerably from jurisdiction to jurisdiction. Worryingly, there are variations in form, if not in substance, between patent offices working from the same legal source. Against the background of a sea change in the US position, there is the prospect of a clarification of the European Patent Office approach that will provide a platform for consistency in Europe. This paper focuses on the UK position, highlights the tension between the UK and the EPO and considers the key questions before the EPO's Enlarged Board of Appeal. 相似文献
947.
Alastair Ruffell Colm Donnelly Naomi Carver Eileen Murphy Emily Murray James McCambridge 《Forensic science international》2009,183(1-3):e11-e16
Geographic location, time of reporting and need for rapid evaluation contributed to a lack of intelligence concerning a suspect burial site in scrub woodland (~15 km from the last known location of a missing person) in Northern Ireland. Police received reports of a subsiding ‘grave’, which was evaluated positively using GPR and victim recovery dogs (VRD). After 24 h work, archaeological excavation showed a vertical-sided, stepped excavation on undisturbed clay with no inhumation. Subsequent research showed the feature to be an engineering trial pit. The GPR response was a water table and rocks, VRD were possibly reacting to disturbed ground. The work serves as a demonstration of good archaeological practice in suspect burial excavation, following a lack of landscape evaluation and poor overall intelligence. 相似文献
948.
Christopher J. Sullivan Jean Marie McGloin James V. Ray Michael S. Caudy 《Journal of Quantitative Criminology》2009,25(4):419-441
Offending specialization continues to be a subject of empirical inquiry for scholars interested in criminal careers. Early
research consistently spoke to the generality of offending profiles, but more recent work has revealed somewhat mixed findings.
These results have emerged alongside newly developed and applied methods that detect and describe offending specialization.
To what extent these methods shape divergent conclusions and/or provide overlapping insight remains unclear, however. Therefore,
the degree to which more recent inquiries are actually studying the same operational definition of specialization is unknown.
In order to consider this issue further, this study utilizes four frequently applied approaches with a single data set. The
study indicates when and where findings converge and also describes any unique insights provided by each method. The work
concludes with a discussion surrounding the utility of applying multiple strategies in assessing specialization in criminal
offending. 相似文献
949.
技术标准垄断的法律控制 总被引:1,自引:0,他引:1
在知识经济条件下知识产权对经济生活的作用日益凸显,并在高新技术的快速发展中不断得以扩张与强化,其与技术标准结合所形成的技术标准垄断,对市场竞争的危害日益严重,迫切需要反垄断法予以规制。但产生并发展于工业经济时代的反垄断法并无直接针对技术标准垄断的具体规则,导致法律适用中的严重困惑与障碍,难以适应新条件下控制技术标准垄断的要求。2007年8月我国颁布的《反垄断法》虽然规定作为知识产权垄断表现形式之一的技术标准垄断"应受"该法规制,但同样未能解决"如何"规制的问题。因此,在反垄断法的现有制度体系中构建新的控制技术标准垄断的制度规则,是解决这一问题的重要途径。该制度规则概括讲主要包括两大部分内容:一是对技术标准中的知识产权人规定特别的反垄断义务;二是对技术标准制定与实施中的垄断行为予以反垄断审查与惩处。 相似文献
950.
民事没收是一种对物不对人的制裁措施,它所针对的是一类特殊的财物,即犯罪收益。民事没收可以在没有刑事案件的情况下没收财产,即便被告人已经死亡或者在逃,甚至即便还不知晓谁实施了违法行为。民事没收适用民事诉讼的"谁主张谁举证"原则,要求那些声称对财物享有合法权利的人员承担相应的证明责任,并且只要求法官"根据优势证据"的标准证明裁断有关财产是否应被没收。我国应当借鉴外国的民事没收制度以及相关的成功经验,尽快建立针对犯罪所得或者违法行为收益的、独立的财产没收制度。 相似文献