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排序方式: 共有343条查询结果,搜索用时 31 毫秒
1.
Jesse W. Campbell 《Public Performance & Management Review》2020,43(4):741-765
AbstractGoals in the public sector are complex and managers can face situations in which pursuing one legitimate goal necessitates performance trade-offs in other areas. This study tests how knowledge of legitimate performance trade-offs shapes the perception of red tape. Using a vignette experimental design and a sample of university students, between group t-tests and regression analyses suggest that, when evaluating increased rule burden, individuals that are provided with information about how objectively burdensome rules serve alternative values such as equity and effectiveness associate them with lower levels of red tape. A series of Monte Carlo simulations suggest that this effect is substantial. 相似文献
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作者用引物Y_3、Y_4和DNA聚合酶链式反应(PCR)作微量人类血液(痕)和毛根的性别鉴定。扩增的靶序列位于Y染色体DNA特异3.4kb重复序列中,扩增产物为460bp。检材用量为:新鲜血液0.5μl、血痕纱纤维1mm、毛根单个。20例保存4个月的血痕与2例保存6年半的血痕性别判定结果均正确,无性别记载的保存9~11年的3例血痕显现了清晰的460bpY特异DNA扩增带。15例保存20天的自然脱落毛根性别判定结果均正确。本法省略了检材处理中的酚-氯仿抽提DNA等纯化步骤,既简化了实验操作,又减少了检验过程中外源DNA的污染机会和样品DNA的损耗,使这一性别鉴定方法更符合法医学实践的需要。 相似文献
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目的 了解中国5个群体D20S85基因座的群体遗传学数据,比较它们之间的遗传学差异,探讨其在法医学应用中的意义。方法 分别收集5个群体622名无关个体的血样,Chelex-100快速抽提法或饱和酚/氯仿法抽提DNA;扩增后经PAGE垂直板电泳、银染,进行D20S85基因座分型。结果 在5个群体622名无关个体中,共检出9个等位基因,并首次在广东汉族和广西壮族群体中检出等位基因14;每个群体基因频率大于0.05的均为6个,D20S85*6为最常见等位基因。5个群体共观察到35种基因型,群体内基因型频率分布均符合Hardy-Weinberg氏平衡,各群体间基因型构成比无显著性差异。观察140次减数分裂未发现突变。各群体的期望杂合度为0.7720~0.7912;非父排除率,在三联体为0.7538~0.7594,二联体为0.3988~0.4297;个人识别率为0.9175~0,9272;多态信息含量为0.7442~0.7656。应用于亲子鉴定和个人识别案例,效果满意。结论 D20S85基因座是法医学应用价值较高的遗传标记系统。 相似文献
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虚拟价值链的理论与应用 总被引:2,自引:0,他引:2
本文详述了虚拟价值链的思想 ,并尝试构建出虚拟价值链的一般理论模型 ,从而解决了企业在信息时代的竞争中缺少战略指导的缺陷。通过论述虚拟价值链和传统价值链的关系 ,本文指出了虚拟价值链模型的适用范围 ,并提出了企业应用这一模型进行竞争的基本原则和方法。 相似文献
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Stefan Mann 《国际公共行政管理杂志》2017,40(4):342-347
Power asymmetries between farmers and slaughterhouses have led the Swiss government to install an independent agency that evaluates the quality of pig and cattle carcasses. This case is used to explore public interventions to mitigate power asymmetries. The independent classification is described and its economic rationale explored. The positions of the most important stakeholders in the system are depicted and the counter-arguments analyzed by objective hermeneutics. It is concluded that public interventions against power asymmetries are no panacea but can be useful to create a just and effective system. 相似文献
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A plethora of literature has been undertaken to study the validity of the Feldstein–Horioka (FH) puzzle. However, divergent views continue to persist in the FH puzzle literature. This study explores the empirical validity of the FH puzzle in the case of South Asian countries using annual data from 1960 to 2017. Both panel data approach and Markov‐switching regression approach are used to empirically analyze the FH puzzle. The results of the cointegration test confirm the long‐run relationships between saving and investment in the selected South Asian countries. The results of Markov‐switching regression confirm that the saving‐retention coefficient has shifted from high to low values and also from low to high values. Thus, the FH puzzle exists for a particular time period and mostly depends on the regime shifts in the South Asian countries. The results of panel fully modified ordinary least squares (FMOLS) and dynamic ordinary least squares (DOLS) methods also confirm that FH puzzle holds for the South Asian countries. Therefore, the study suggests that any saving promotion policies are desirable for enhancing investment among the South Asian regions. 相似文献
9.
Pablo Pacheco George Schoneveld Ahmad Dermawan Heru Komarudin Marcel Djama 《Regulation & Governance》2020,14(3):568-598
The global palm oil value chain has grown in complexity; stakeholder relationships and linkages are increasingly shaped by new public and private standards that aim to ameliorate social and environmental costs while harnessing economic gains. Regulatory initiatives in the emerging policy regime complex struggle to resolve sector‐wide structural performance issues: pervasive land conflicts, yield differences between companies and smallholders, and carbon emissions arising from deforestation and peatland conversion. Identifying opportunities for more effective governance of the palm oil value chain and supply landscapes, this paper explores disconnects, complementarities, and antagonisms between public regulations and private standards, looking at the global, national, and subnational policy domains shaping chain actors’ conduct. Greater complementarities have emerged among transnational instruments, but state regulation disconnects persist and antagonisms prevail between national state regulations and transnational private standards. Emerging experimental approaches, particularly at subnational level, aim to improve coordination to both enhance complementarities and resolve disconnects. 相似文献
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In the debate on minimal media effects and their causes, methodological concerns about measurement are rarely discussed. We argue that even in state-of-the-art media-effects studies that combine measures of media messages and media use (i.e., linkage analyses), measurement error in both the media content analysis and the media use self-reports will typically lead to severely downward-biased effect estimates. We demonstrate this phenomenon using a large Monte Carlo simulation with varying parameters of the content analysis and the survey study. Results show that measurement error in the content analysis and media use variables does indeed lead to smaller effect estimates, especially when the media messages of interest are relatively rare. We discuss these findings as well as possible remedies and implications for future research. 相似文献