全文获取类型
收费全文 | 6093篇 |
免费 | 237篇 |
专业分类
各国政治 | 429篇 |
工人农民 | 182篇 |
世界政治 | 618篇 |
外交国际关系 | 441篇 |
法律 | 2551篇 |
中国政治 | 50篇 |
政治理论 | 1988篇 |
综合类 | 71篇 |
出版年
2023年 | 41篇 |
2022年 | 28篇 |
2021年 | 54篇 |
2020年 | 103篇 |
2019年 | 149篇 |
2018年 | 166篇 |
2017年 | 194篇 |
2016年 | 199篇 |
2015年 | 115篇 |
2014年 | 172篇 |
2013年 | 1028篇 |
2012年 | 170篇 |
2011年 | 174篇 |
2010年 | 174篇 |
2009年 | 180篇 |
2008年 | 157篇 |
2007年 | 218篇 |
2006年 | 191篇 |
2005年 | 225篇 |
2004年 | 227篇 |
2003年 | 209篇 |
2002年 | 225篇 |
2001年 | 120篇 |
2000年 | 115篇 |
1999年 | 97篇 |
1998年 | 91篇 |
1997年 | 92篇 |
1996年 | 89篇 |
1995年 | 92篇 |
1994年 | 93篇 |
1993年 | 78篇 |
1992年 | 84篇 |
1991年 | 91篇 |
1990年 | 62篇 |
1989年 | 66篇 |
1988年 | 64篇 |
1987年 | 63篇 |
1986年 | 67篇 |
1985年 | 62篇 |
1984年 | 53篇 |
1983年 | 62篇 |
1982年 | 48篇 |
1981年 | 55篇 |
1980年 | 38篇 |
1979年 | 37篇 |
1978年 | 32篇 |
1977年 | 33篇 |
1976年 | 30篇 |
1974年 | 15篇 |
1967年 | 14篇 |
排序方式: 共有6330条查询结果,搜索用时 234 毫秒
971.
Loveland D Boyle M 《International journal of offender therapy and comparative criminology》2007,51(2):130-150
This article reviews the research on intensive case management (ICM) programs as a jail diversion intervention for people with a serious mental illness (SMI). The review includes two types of ICM programs: (a) general ICM programs that included an assessment of arrests and incarceration rates for people with an SMI and (b) ICM programs specifically implemented as a component of a jail diversion intervention for people with an SMI. Results indicate that general ICM programs (19) rarely led to reductions in jail or arrest rates over time, and these rates were similar to those found in standard mental health services. General ICM programs that included an integrated addiction treatment component (8) had mixed results but a trend toward reductions in rates of arrests and incarceration over time for individuals with an SMI and a co-occurring substance use disorder. Results were mixed for jail diversion interventions with an ICM program, but most ICM programs (8) led to significant reductions in arrests and incarcerations over time. Specific elements of effective ICM jail diversion programs are discussed. 相似文献
972.
Major obstacles block the effectiveness of therapy in prison. Many inmates have an inherent mistrust for verbal disclosure. Rigid defenses exist for basic survival. Despite these defenses, there has been support for art therapy as a valuable tool. Unfortunately, there has been little research to measure the effectiveness of art therapy in prison. Two quantitative studies were initiated in a North Florida prison to measure the effectiveness of art therapy with inmates, specifically in decreasing depressive symptoms. This article will present a pilot and follow-up study. The methods, including the Formal Elements Art Therapy Scale (FEATS) and the Beck Depression Inventory-Short Form, will be delineated. What was revealed was that although the FEATS proved more effective as a measurement tool for the pilot than for the follow-up study, ultimately, the results reflected a significant decrease in depressive symptoms in those inmates who participated in the program. 相似文献
973.
The exclusion of diagnostic methods practised on the human bodyfrom patentability was subject to clarification from the EnlargedBoard of Appeal in Case G 1/04 of 16 December 2005. This casegives a practical example of the application of the EnlargedBoard's decision. 相似文献
974.
Dedouit F Telmon N Guilbeau-Frugier C Gainza D Otal P Joffre F Rougé D 《Journal of forensic sciences》2007,52(4):960-964
The body of an unidentified elderly woman was found trapped in a floodgate. Prior to autopsy, full-body multislice computed tomography (MSCT) was performed for study of bone lesions and cause of death. Age was estimated by analysis of the sternal end of the fourth rib and of the pubic symphyseal medial articular surfaces. The results were then compared with the autopsy findings. MSCT was superior to autopsy in diagnosis of traumatic bone lesions and also revealed dental anomalies and signs of drowning. Age estimation gave a similar result for both methods. This case report illustrates the potential value of MSCT for medico-legal investigations of death: diagnosis of injuries, possibility of determining the cause of death, and anthropological study in order to estimate age or to visualize features likely to enable identification of a corpse. 相似文献
975.
Collins M Heagney A Cordaro F Odgers D Tarrant G Stewart S 《Journal of forensic sciences》2007,52(4):898-903
Five 44 gallon drums labeled as glycidyl methacrylate were seized by the Australian Customs Service and the Australian Federal Police at Port Botany, Sydney, Australia, in December 2004. Each drum contained a white, semisolid substance that was initially suspected to be 3,4-methylenedioxymethylamphetamine (MDMA). Gas chromatography-mass spectroscopy (GC/MS) analysis demonstrated that the material was neither glycidyl methacrylate nor MDMA. Because intelligence sources employed by federal agents indicated that this material was in some way connected to MDMA production, suspicion fell on the various MDMA precursor chemicals. Using a number of techniques including proton nuclear magnetic resonance spectroscopy ((1)H NMR), carbon nuclear magnetic resonance spectroscopy ((13)C NMR), GC/MS, infrared spectroscopy, and total synthesis, the unknown substance was eventually identified as methyl 3-[3',4'(methylenedioxy)phenyl]-2-methyl glycidate. The substance was also subjected to a published hydrolysis and decarboxylation procedure and gave a high yield of the MDMA precursor chemical, 3,4-methylenedioxyphenyl-2-propanone, thereby establishing this material as a "precursor to a precursor." 相似文献
976.
Traditional forensic soil comparisons are performed via physical and/or chemical examinations of color, texture, and mineral content, leaving any organic- or water-soluble fractions unexamined. This study uses high-performance liquid chromatography (HPLC) and ion chromatography (IC) to assess the qualitative and quantitative variation in these fractions of soil. Soil samples (n=120) were collected over the course of 3 weeks from urban, suburban, and rural locations in and around Lansing, MI. Additional samples from six of these locations (two urban, two suburban, and two rural) were collected once a week for 10 weeks for temporal analysis. Nine additional samples, equally spaced over a 1 m(2) grid, from these same six locations were collected for spatial analyses. Qualitative and quantitative analysis of the resultant chromatograms separated the 120 samples into 10 groups by HPLC and 23 groups by IC. This study shows that using HPLC and IC to analyze the organic- and water-soluble fractions of soil can successfully discriminate samples. Quantitative analysis of the results eliminates some false inclusions by providing further differentiation of samples. The results of this study indicate that adding HPLC and IC analyses to traditional forensic soil analysis schemes can improve overall sample differentiation. The methods used in this study were also able to detect both qualitative and quantitative variations in soil over a relatively small geographic area. This demonstration of soil heterogeneity underscores the importance of the collection of a representative known sample population when assessing a forensic soil comparison. Significant temporal variation was also demonstrated over the course of 10 weeks of sampling; however, samples were found to be consistent over shorter periods of time. Baseline levels of inorganic anions were determined via IC; these levels may be useful in assessing the significance of anions detected in soil from cases involving low explosives. 相似文献
977.
978.
Raychelle M. Burks M.F.S. Shari E. Pacquette B.S. Mike A. Guericke B.S. Mark V. Wilson Ph.D. David J. Symonsbergen M.S. Kerry A. Lucas Ph.D. Andrea E. Holmes Ph.D. 《Journal of forensic sciences》2010,55(3):723-727
Abstract: The design and preliminary characterization of a novel sensor for drugs of abuse, DETECHIP®, is described in this proof‐of‐concept note. Combining both colorimetric and fluorimetric assays, DETECHIP® is suitable for lab and field use. More than a conventional spot test which provides a single “yes or no” answer, DETECHIP® provides twenty responses for a more complete characterization of suspect material. This is accomplished by visually noting colorimetric and fluorescent changes of carefully selected dyes upon the addition of test analytes, including drugs of abuse, with respect to controls. Color and fluorescence changes are recorded numerically so that a 20 digit identification code can be constructed for comparison of test analytes and known compounds. DETECHIP® is applicable to a variety of drugs, both plant‐derived and synthetic, addressing the need to use several different spot tests simultaneously for a single sample. 相似文献
979.
Chang Liu B.Sc. Hyun M. Park Ph.D. Maria V. Monsalve Ph.D. David D. Y. Chen Ph.D. 《Journal of forensic sciences》2010,55(4):1039-1043
Abstract: Adipocere is a postmortem decomposition product consisting of mostly a mixture of free fatty acids (FFAs) that are formed because of the hydrolysis of triglycerides in adipose tissues. This article describes a simple and robust method for the extraction, identification, and quantification of FFA commonly found in adipocere using gas chromatography–mass spectrometry (GC/MS). This method was applied to analyze tissues from Kwäday Dän Ts’ìnchí, ancient remains discovered in a retreating glacier in the Tatshenshini‐Alsek Park, British Columbia, Canada in August 1999. The lyophilized tissues were grinded and extracted with hexane. The trimethylsilyl fatty acid derivatives were analyzed by GC/MS, and the relative abundances of myristic acid, palmitic acid, oleic acid, and stearic acid were determined. Milligram per gram levels of saturated fatty acids were found in the tissues of the ancient remains, while the levels of unsaturated fatty acids, such as palmitoleic acid, were found to be negligible. The results provided further evidence of the existence of adipocere found during forensic examination of the Kwäday Dän Ts’ìnchí ancient remains. 相似文献
980.
Dirk T. Van Der Meer D.M.D. Paula C. Brumit D.D.S. Bruce A. Schrader D.D.S. Stephen B. Dove D.D.S. M.S. David R. Senn D.D.S. 《Journal of forensic sciences》2010,55(6):1499-1503
Abstract: An online forensic dental identification exercise was conducted involving 24 antemortem–postmortem (AM–PM) dental radiograph pairs from actual forensic identification cases. Images had been digitally cropped to remove coronal tooth structure and dental restorations. Volunteer forensic odontologists were passively recruited to compare the AM–PM dental radiographs online and conclude identification status using the guidelines for identification from the American Board of Forensic Odontology. The mean accuracy rate for identification was 86.0% (standard deviation 9.2%). The same radiograph pairs were compared using a digital imaging software algorithm, which generated a normalized coefficient of similarity for each pair. Twenty of the radiograph pairs generated a mean accuracy of 85.0%. Four of the pairs could not be used to generate a coefficient of similarity. Receiver operator curve and area under the curve statistical analysis confirmed good discrimination abilities of both methods (online exercise = 0.978; UT‐ID index = 0.923) and Spearman’s rank correlation coefficient analysis (0.683) indicated good correlation between the results of both methods. Computer‐aided dental identification allows for an objective comparison of AM–PM radiographs and can be a useful tool to support a forensic dental identification conclusion. 相似文献