首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1493篇
  免费   10篇
各国政治   9篇
工人农民   6篇
世界政治   106篇
外交国际关系   186篇
法律   808篇
中国共产党   3篇
中国政治   14篇
政治理论   229篇
综合类   142篇
  2025年   1篇
  2024年   37篇
  2023年   9篇
  2022年   20篇
  2021年   45篇
  2020年   96篇
  2019年   127篇
  2018年   78篇
  2017年   46篇
  2016年   23篇
  2015年   24篇
  2014年   33篇
  2013年   32篇
  2012年   52篇
  2011年   38篇
  2010年   38篇
  2009年   135篇
  2008年   208篇
  2007年   249篇
  2006年   59篇
  2005年   26篇
  2004年   23篇
  2003年   21篇
  2002年   14篇
  2001年   11篇
  2000年   12篇
  1999年   11篇
  1998年   4篇
  1997年   5篇
  1996年   2篇
  1995年   4篇
  1994年   1篇
  1993年   4篇
  1992年   4篇
  1991年   2篇
  1989年   5篇
  1986年   1篇
  1985年   1篇
  1984年   1篇
  1981年   1篇
排序方式: 共有1503条查询结果,搜索用时 15 毫秒
201.
十六大所确立的主题和基本内容 ,为建设以民主政治为核心的宪政国家指引了方向。十六大报告的主旨将在六个方面对宪政的发展产生影响 :小康社会初步奠定宪政的社会基础 ;扩大基层民主是宪政建设的立足点 ;完善财产制是对宪政经济基础的巩固 ;对权力的制约和监督以及推进司法体制改革是宪政必备的两个要素 ;解决“三农”问题和深化分配制度改革是宪政实施的社会环境保障。  相似文献   
202.
本研究利用真核表达系统表达非洲猪瘟病毒的CD2v胞外区蛋白,研究其免疫特性,制备多克隆抗体并研究其性质,为研发特异性单抗奠定数据基础.以非洲猪瘟病毒Wuhan2019-1株(GenBank:MN393476.1)为模板,合成CD2v胞外区基因序列,并将其克隆至真核表达载体pCAGGS载体中,获得pC-AGGS-CD2v...  相似文献   
203.
    
The Transition metal dichalcogenides (TMDs) attract more interest because of their layered structure and high surface-volume ratio. Most works are based on 3D and 2D, there is scarce research on its reduced dimensionality. In this study, Zirconium disulfide (ZrS2) (where M = Zr, X = S) Quantum Dots (QDs) are synthesized by Top-down Chemical Bath Deposition (CBD) method, and the physical properties of the sample are characterized by the X-ray powder diffraction method (XRD) for phase identification, Scanning electron microscope (SEM) with Energy Dispersive X-ray Spectroscopy (EDS) for morphology and composition. Synthesized ZrS2 QDs are found to belong to the Trigonal lattice system with a crystalline size 0.58 nm. The Electrochemical performance of the synthesized ZrS2 QDs is studied with the fabricated electrode from Cyclic Voltammetry (CV), Galvanostatic charge and discharge (GCD)/Chronopotentiometry (CP), and Electrochemical Impedance Spectroscopy (EIS) studies. The specific capacitance (Csp), energy density (Ed), and power density (Pd) are calculated with the help of a three-electrode system. From the CV and GCD/CP, the fabricated electrode material is found to exhibit Faradaic behavior. The synthesized ZrS2 QDs are found to emerge as suitable candidates for electrochemical energy storage applications.  相似文献   
204.
    
Novel synthetic opioids contribute considerably to the opioid epidemic, especially with the frequent emergence of structurally similar compounds. This case report describes a fatal intoxication involving 2-methyl AP-237. A 54-year-old Caucasian male was found deceased from an apparent drug overdose. A plastic container labeled “2MAP” and a cut straw were found in the decedent's backpack at the scene. A white substance found in the container tested positive for fentanyl by field testing. According to his medical history, the decedent was treated for a drug overdose 3 years prior to his death. With no diagnostic findings at autopsy, the case was submitted for toxicological analysis. An unknown substance was detected in peripheral blood and urine using gas chromatography with nitrogen phosphorous detection (GC-NPD). Further testing was conducted using gas chromatography–mass spectrometry (GC–MS) and liquid chromatography-quadrupole-time-of-flight mass spectrometry (LC-QTOF-MS) which confirmed the presence of 2-methyl AP-237 and potential metabolites in blood and urine. Quantitation by GC-NPD revealed concentrations of 2-methyl AP-237 in blood and urine at 480 ng/mL and 4200 ng/mL, respectively. The toxicological analysis also identified and quantitated alprazolam in the blood at 55 ng/mL. Additionally, the metabolism of 2-methyl AP-237 was investigated and three hydroxylated metabolites were identified in peripheral blood and urine. Limited literature is available for the detection and quantitation of 2-methyl AP-237 in postmortem specimens. Given the toxicological findings with unremarkable autopsy findings, this case is an example of a fatal intoxication involving 2-methyl AP-237.  相似文献   
205.
When iron-based tools, such as knives or guns, are held, traces of iron can transfer to the skin. However, no previous studies have been published regarding the effect of the elapsed contact time on the transfer of iron species with different valences to the palm. Compared with 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine (PDT), 2,4,6-tri(2′-pyridyl)-1,3,5-triazine (TPTZ) was found to exhibit a higher sensitivity to iron(II) spectrophotometrically. This work employed 2,4,6-tri(2′-pyridyl)-1,3,5-triazine (TPTZ) and UV spectrophotometry to determine the amounts of iron(II), iron(III), and total iron transferred to human palms from iron tools. It was found that the palmar moisture level was an important factor in determining the amounts of total iron, including iron(II), transferred to the palm. For identical contact times, the amounts of total iron transferred to the palm was proportional to the palmar moisture, and the difference between the maximum and minimum amounts was 12 μg per hand. However, the amounts of iron(II) transferred to the palm gradually decreased over time for low palmar moisture levels, but steadily increased over time for high palmar moisture levels. Additionally, for average levels of palm moisture, the amounts of iron(II) and iron(III) transferred to the palm gradually decreased and increased, respectively, with longer contact times. Notably, this research could serve as a theoretical basis and guide for the detection of trace iron species with different valences on human palms for criminal investigations.  相似文献   
206.
    
The study of multilevel governance (MLG) is fundamentally concerned with the capacity of MLG to effectively deal with policy problems. However, the notion of problem‐solving itself remains vague. Moreover, MLG research prioritizes questions of structure and agency, while neglecting the role and nature of policy problems themselves. This symposium defines problem‐solving in both procedural and operational terms. The introduction reviews relevant attributes of policy problems and existing assumptions about their influence on problem‐solving. By adding uncertainty, tractability, and three political attributes (power, conflict, salience), we propose an extended list of attributes of policy problems that matter for problem‐solving, and link them to different notions of procedural and operational problem‐solving in MLG. The contributions address the challenges facing problem‐solving in the European Union, adopting a particular focus on the characteristics of policy problems. Empirical cases include the European Semester, Brexit, the governance of the swine flu pandemic, and climate change.  相似文献   
207.
    
This article aims to investigate the extent to which the Bandung Conference affected the international order after the Second World War. By locating the Bandung Conference in the international order transition between 1945 until 1970, I argue that the Bandung Conference should not be treated as merely a milestone of historic anti‐colonial struggles but also a site for the emergence of a modern international order. The Bandung Conference played a key role in shaping the Westphalian interstate system that acknowledges equal sovereignty among states in world politics. From this viewpoint, this article argues that the legacy of the Bandung Conference lies in its role to mediate the transition from colonial order before the Second World War to the modern international order, which is based on sovereignty and equal status among states as the primary members. It does so by putting forward an agenda for global decolonization and delegitimizes the practices of colonialism. The diplomatic struggle after the Bandung Conference continued until the UN Declaration on the Granting of Independence to Colonial Countries and Peoples in 1960, which further locates the contribution of the Bandung Conference to the making of the modern international order as we know it in the present day.  相似文献   
208.
    
Russia sells arms primarily to enhance its influence abroad in key regions, e.g., the Middle East, East, and South Asia. Since the government is the primary customer for this sector’s goods, this sector does not risk collapse even if arms sales decline though arms sales bring vital foreign currency. But, the intervening motive between seeking enhanced global influence and maintaining the defense sector is the acquisition of elite rents since the arms trade offers multiple opportunities for corruption. We then focus on the impact of arms production and sales on international security. First that means looking at how Russia’s militarization and its increasing conversion into a mobilization state is affected by the ever growing importance of defense investment and production to the government and the economy. We then investigate the impact of arms sales on international security in Latin America, the Middle East, and East Asia.  相似文献   
209.
    
  相似文献   
210.
    
This paper sheds light on the role of regulatory agencies in framing public problems. It is well acknowledged that regulatory agencies are becoming key actors in the policy process. To this extent, a common understanding regarding the delegation of regulatory agencies relates to the fact that they solve problems rather than define them. Although the literature on framing and regulatory agencies is abundant, studies questioning the combination of these two phenomena are scarce. In this paper, a specific “framing index” is developed to measure the involvement of 36 regulators in framing issues in two sectors, namely food safety and environmental protection. This measurement is applied to a cross‐national and cross‐sectorial fuzzy‐set qualitative comparative analysis (fsQCA). The main results indicate that when agencies are highly involved in framing, they are old, they have a low number of staff members, and the risk of venue shifting is low.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号