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81.
The Spatial Patterning of County Homicide Rates: An Application of Exploratory Spatial Data Analysis 总被引:4,自引:0,他引:4
Steven F. Messner Luc Anselin Robert D. Baller Darnell F. Hawkins Glenn Deane Stewart E. Tolnay 《Journal of Quantitative Criminology》1999,15(4):423-450
The possibility that homicides can spread from one geographic area toanother has been entertained for some time by social scientists, yetsystematic efforts to demonstrate the existence, or estimate the strength,of such a diffusion process are just beginning. This paper uses exploratoryspatial data analysis (ESDA) to examine the distribution of homicides in 78counties in, or around, the St. Louis metropolitan area for two timeperiods: a period of relatively stable homicide (1984–1988) and aperiod of generally increasing homicide (1988–1993). The findingsreveal that homicides are distributed nonrandomly, suggestive of positivespatial autocorrelation. Moreover, changes over time in the distribution ofhomicides suggest the possible diffusion of lethal violence out of onecounty containing a medium-sized city (Macon County) into two nearbycounties (Morgan and Sangamon Counties) located to the west. Althoughtraditional correlates of homicide do not account for its nonrandom spatialdistribution across counties, we find some evidence that more affluentareas, or those more rural or agricultural areas, serve as barriers againstthe diffusion of homicides. The patterns of spatial distribution revealedthrough ESDA provide an empirical foundation for the specification ofmultivariate models which can provide formal tests for diffusion processes. 相似文献
82.
Glenn R. Parker 《Public Choice》1989,63(3):237-252
This paper challenges the assumption inherent in most models of legislative behavior — namely that congressmen are driven by the desire for reelection. I offer an alternative perspective: incumbents seek to maximize their discretionary investments and the income generated by the job. The only constraint on this behavior is that legislators provide a satisfactory level of constituency service — a product that I suggest entails slight opportunity, and few manufacturing, costs for congressmen, and one that is unlikely to lose its value with increased production. I also demonstrate that increases in salary and discretionary investments have lengthened congressional careers. 相似文献
83.
Anil Bamezai Glenn A Melnick Joyce M Mann Jack Zwanziger 《Journal of policy analysis and management》2003,22(1):65-84
In the selective contracting era, consumer choice has generally been absent in most state Medicaid programs, including California's (called Medi-Cal). In a setting where beneficiary exit is not a threat, a large payer may have both the incentives and the ability to exercise undue market power, potentially exposing an already vulnerable population to further harm. The analyses presented here of Medi-Cal contracting data, however, do not yield compelling evidence in favor of the undue market power hypothesis. Instead, hospital competition appears to explain with greater consistency why certain hospitals choose to contract with Medi-Cal while others do not, the trends in inpatient prices paid by Medi-Cal over time, and the effect of price competition on service cutbacks, such as emergency room closures. Copyright 2003 by the Association for Public Policy Analysis and Management. 相似文献
84.
Mahtani Shireen Hasking Penelope Melvin Glenn A. 《Journal of youth and adolescence》2019,48(4):753-770
Journal of Youth and Adolescence - Non-suicidal self-injury (NSSI) is particularly prevalent during adolescence and emerging adulthood. The salience of shame during these developmental periods... 相似文献
85.
Erica L. Romsos M.F.S. Julie L. French M.S. Mark Smith B.S. Vincent Figarelli B.S. Frederick Harran M.S. Glenn Vandegrift Lilliana I. Moreno Ph.D. Thomas F. Callaghan Ph.D. Joanie Brocato Ph.D. Janaki Vaidyanathan M.S. Juan C. Pedroso A.A. Andrea Amy B.S. Stephanie Stoiloff M.S. Victor H. Morillo P.S.M. Karina Czetyrko P.S.M. Elizabeth D. Johnson M.S. Jessica de Tagyos M.S.F.S. Ashley Murray B.S. Peter M. Vallone Ph.D. 《Journal of forensic sciences》2020,65(3):953-959
Three commercially available integrated rapid DNA instruments were tested as a part of a rapid DNA maturity assessment in July of 2018. The assessment was conducted with sets of blinded single-source reference samples provided to participants for testing on the individual rapid platforms within their laboratories. The data were returned to the National Institute of Standards and Technology (NIST) for review and analysis. Both FBI-defined automated review (Rapid DNA Analysis) and manual review (Modified Rapid DNA Analysis) of the datasets were conducted to assess the success of genotyping the 20 Combined DNA Index System (CODIS) core STR loci and full profiles generated by the instruments. Genotype results from the multiple platforms, participating laboratories, and STR typing chemistries were combined into a single analysis. The Rapid DNA Analysis resulted in a success rate of 80% for full profiles (85% for the 20 CODIS core loci) with automated analysis. Modified Rapid DNA Analysis resulted in a success rate of 90% for both the CODIS 20 core loci and full profiles (all attempted loci per chemistry). An analysis of the peak height ratios demonstrated that 95% of all heterozygous alleles were above 59% heterozygote balance. For base-pair sizing precision, the precision was below the standard 0.5 bp deviation for both the ANDE 6C System and the RapidHIT 200. 相似文献
86.
Jack Garland B.Med. Benjamin Ondruschka M.D. Simon Stables M.B.Ch.B. Paul Morrow M.D. Kilak Kesha M.B.B.S. Charley Glenn M.D. Rexson Tse M.D. 《Journal of forensic sciences》2020,65(6):2019-2022
Postmortem computed tomography (PMCT) is a relatively recent advancement in forensic pathology practice that has been increasingly used as an ancillary investigation and screening tool. One area of clinical CT imaging that has garnered a lot of research interest recently is the area of “artificial intelligence” (AI), such as in screening and computer-assisted diagnostics. This feasibility study investigated the application of convolutional neural network, a form of deep learning AI, to PMCT head imaging in differentiating fatal head injury from controls. PMCT images of a transverse section of the head at the level of the frontal sinus from 25 cases of fatal head injury were combined with 25 nonhead-injury controls and divided into training and testing datasets. A convolutional neural network was constructed using Keras and was trained against the training data before being assessed against the testing dataset. The results of this study demonstrated an accuracy of between 70% and 92.5%, with difficulties in recognizing subarachnoid hemorrhage and in distinguishing congested vessels and prominent falx from head injury. These results are promising for potential applications as a screening tool or in computer-assisted diagnostics in the future. 相似文献
87.
Ted Glenn 《Canadian public administration. Administration publique du Canada》2001,44(2):188-203
Abstract: Why are cabinet decision‐making systems designed the way they are? Traditional approaches to this question stress the importance of representational imperatives (i.e., region, language and gender), the need for managerial capacity and collegiality in complex organizations, or a particular government's fiscal or policy program. While these approaches have merit, they fail to pay sufficient attention to the fact that cabinet decision‐making systems are in the first instance very intimate reflections and extensions of the political instincts, personal aptitudes, and governing experience of first ministers. The author sets out to understand recent reforms to Ontario cabinet decision‐making in precisely this way ‐ how did Premier Michael Harris' sense of his government's mandate, his personal approach to decision‐making, and the practical lessons learned over the course of his government's first mandate influence the design of Ontario's cabinet decision‐making system between 1995 and 1999? This article begins with a short history of Ontario's cabinet decision‐making system, focusing on the period from 1968 to 1995. It then provides details of reforms introduced between 1995 and 1999 and concludes with some thoughts on how Premier Harris' political instincts, personal aptitudes, and governing experience influenced these reforms. Sommaire: Pourquoi les systèmes de prise de décisions du Cabinet sont‐ils conçus comme ils le sont? Les réponses traditionnelles à cette question soulignent l'impor‐tance des impératifs de représentation (c.‐à‐d. la région, la langue et le sexe), le besoin de compétence en matière de gestion et la collégialité dans les organismes complexes, ou bien un programme politique ou budgétaire particulier du gouvernement. Ces approches sont valables, mais elles ne tiennent pas suffisamment compte du fait que les systemes de prise de décisions du Cabinet sont, avant tout, le fruit de reflexions très approfondies et d'instincts politiques, d'aptitudes personnelles, et de l'expérience gouvernementale des premiers ministres. L'auteur de cet article essaie de comprendre, précisément dans ce sens, les récentes réformes en matière de prise de décisions au Cabinet de 1'Ontario: comment est‐ce que l'idée qu'a Michael Harris du mandat de son gouvernement, son approche personnelle face à la prise de décisions, et les leçons pratiques tirées de son premier mandat (1995–1999) ont‐elles influencé la conception du système de prise de décisions du Cabinet de l'Ontario? L'auteur commence par brosser un bref historique du système de prise de décisions du Cabinet de l'Ontario, en se penchant tout particulièrement sur la période allant de 1968 A 1995. Ensuite, il présente en détail les réformes introduites de 1995 à 1999 et conclut par quelques réflexions sur la manière dont les instincts politiques du Premier ministre Harris, ses aptitudes personnelles et son expérience du gouvernement ont influencé ces réformes. 相似文献
88.
Joe Edgar Glenn 《Family Court Review》1998,36(4):503-510
This article outlines the implementation of a children's component of a court-connected, mandatory divorce education program in Jackson County, Missouri. The efforts made to include significant stakeholders in the planning and implementation process are described. The curriculum for adults and children is summarized, and the structure and administration of the program are presented. Class provider recruitment and teacher qualifications are presented, as well as an overview of the initial responses to the children's classes. The difficulties and successes described may give direction to others considering the inclusion of children in mandatory divorce education classes. 相似文献
89.
90.