全文获取类型
收费全文 | 293篇 |
免费 | 22篇 |
专业分类
各国政治 | 19篇 |
工人农民 | 8篇 |
世界政治 | 17篇 |
外交国际关系 | 24篇 |
法律 | 185篇 |
政治理论 | 62篇 |
出版年
2024年 | 1篇 |
2023年 | 5篇 |
2022年 | 3篇 |
2021年 | 4篇 |
2020年 | 11篇 |
2019年 | 14篇 |
2018年 | 14篇 |
2017年 | 23篇 |
2016年 | 17篇 |
2015年 | 8篇 |
2014年 | 17篇 |
2013年 | 46篇 |
2012年 | 18篇 |
2011年 | 14篇 |
2010年 | 8篇 |
2009年 | 10篇 |
2008年 | 12篇 |
2007年 | 10篇 |
2006年 | 8篇 |
2005年 | 11篇 |
2004年 | 11篇 |
2003年 | 15篇 |
2002年 | 5篇 |
2001年 | 4篇 |
2000年 | 5篇 |
1999年 | 3篇 |
1998年 | 5篇 |
1997年 | 3篇 |
1995年 | 1篇 |
1994年 | 6篇 |
1993年 | 1篇 |
1989年 | 1篇 |
1967年 | 1篇 |
排序方式: 共有315条查询结果,搜索用时 15 毫秒
121.
Francesco Campanella Maria Rosaria Della Peruta Stefano Bresciani Luca Dezi 《The Journal of Technology Transfer》2017,42(2):267-284
The emerging relationships connecting organizations are the condition on which innovation is founded nowadays, so it is pivotal to achieve a vaster comprehension of the phenomenon through the exploitation of new dynamics and the exploration of new trajectories. In line with the Quadruple Helix (QE) approach, it seems reasonable to expect that the different environments in which firms operate would highlight the expectations of the various market governance systems, which firms must comply with in order to gain social legitimacy and improve their capacity for survival. To determine whether the Quadruple Helix model has an effect on the firms’ profitability, the authors employed the classification analysis method (Classification And Regression Trees). The sample is composed by 4215 manufacturing firms located in science parks. In our empirical model, the variable “citizen” classifies businesses with high Return On Investment in the best way. This shows that in science parks “the fourth helix” (citizen) has an important role in classifying the firms with the highest performance. Moreover, the majority of firms that attribute high importance to the collaboration with private financial institutions in order to finance innovations have a high ROI. In addition, firms with high economic performance in the model of the quadruple helix generate product innovation. 相似文献
122.
Nieddu M Boatto G Serra D Soro A Lorenzoni S Lubinu F 《Journal of forensic sciences》2007,52(5):1223-1224
A fatal case involving mepivacaine-induced epidural anesthesia is described. The pathological findings were typical of cardiac shock from ischemic origin. Cerebrospinal fluid (CSF) was obtained several hours after death and mepivacaine was identified by gas chromatography-mass spectrometry (GC-MS). Its concentration was determined by high performance liquid chromatography with diode array detection (HPLC-DAD). Extraction from CSF was performed by deproteinization with acetonitrile. The mepivacaine concentration in the sample was 264 microg/mL. Concentrations of mepivacaine in CSF following epidural anesthesia are not reported in literature to our knowledge. This is the first reported case of death in which the mepivacaine concentration in CSF has been determined. 相似文献
123.
Claudia Liuzzi M.D. Felice Carabellese M.D. Francesco Vinci M.D. 《Journal of forensic sciences》2010,55(4):1120-1122
Abstract: A large number of conditions have been mistaken for abuse. Differentiating accidental injuries from inflicted injuries is important in the management of injured children. In this work, the authors describe two cases of accidental perineal‐vaginal injury in children. In case 1, a 4‐year‐old girl suffered a vaginal tear caused by violent stretching during play; in case 2, a 3‐year‐old girl had minor lacerations of labia minora and majora. The intervention of a multi‐specialist team including a forensic pathologist and forensic psychiatrist was the key factor in being able to exclude abuse by third parties in the described cases.. This leads to the appropriate recommendations to be adopted in the forensic medicine setting. 相似文献
124.
The effects of biased technological change on total factor productivity: empirical evidence from a sample of OECD countries 总被引:2,自引:0,他引:2
Technological change is far from neutral. The empirical analysis of the rate and direction of technological change in a significant
sample of 12 major OECD countries in the years 1970–2003 confirms the strong bias of new technologies. The paper implements
a novel methodology to identify and disentangle the effects of the direction of technological change upon total factor productivity
(TFP) and shows how the introduction of new and biased technologies affects the actual levels of TFP according to the relative
local endowments. The empirical evidence confirms that the introduction of biased technologies enhances TFP when its direction
matches the characteristics of local factor markets so that locally abundant inputs become more productive. When the direction
of technological change favours the intensive use of production factors that are locally scarce, the actual increase of TFP
is reduced. 相似文献
125.
126.
127.
Francesco Della Puppa 《Journal of immigrant & refugee studies》2017,15(4):366-383
We analyze the relation between naturalization, mobility, and security through 50 in-depth interviews with migrants of different origins living in two Italian regions. We show how migrants pursue naturalization both to protect themselves against bureaucracy and deportation and to move to a third country. The second migration is motivated by improving one's conditions, forced by the economic crisis, or completes the original migratory project once a strong passport is obtained. We argue that citizenship is not essentially linked to either stability or mobility and that mobility should be understood as neither exceptional nor always chosen. 相似文献
128.
129.
Tuberculous myocarditis is a rare finding. We present the case of a 33-year-old woman who was in good health and who died suddenly at home. Autopsy and histopathologic examinations revealed granulamatous lesions in the myocardium, lungs, lymph nodes, liver, and spleen. No fast acid bacilli were demonstrated on histological examination. The presence of a Mycobacterium tuberculosis DNA complex was identified using a polymerase chain reaction (PCR) on formalin-fixed paraffin-embedded histological samples. An HIV test carried out on the blood obtained during the autopsy was negative according to the DNA amplification technique (PCR) and enzyme-linked immunosorbent assay serological test. We hypothesize that the mechanism of death was severe ventricular arrhythmia due to granulomatous proliferation in the structures of the interventricular septum. 相似文献
130.
Scott J Minichiello V Mariño R Harvey GP Jamieson M Browne J 《Journal of interpersonal violence》2005,20(3):320-342
The article reviews past and recent research on male sex work to offer a context to understand violence in the industry. It provides a critical review of research to show, first, the assumptions made about male sex workers and violence and, second, how such discourses have shaped thinking on the topic. The article presents a case study and original findings from two studies conducted by the authors in Australia and Argentina on violence in the male sex industry. Finally, the article reviews examples of legislative reforms to show how the sex industry is being regulated. 相似文献