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291.
    
This article unearths the salient factors that trap the aspiring middle class in their progression towards a stable middle class in the City of Johannesburg, South Africa. The study utilises a quantitative case study design, drawing on a sample of 449 aspirants and 578 middle-class heads of households from the 2021 Gauteng City-Region Observatory Quality of Life Survey. A binary logistic regression model was used to analyse these salient factors (key determinants) and their impact on the social mobility of the aspirant middle class. Findings reveal a significant relationship between social mobility and education, racial inequality, asset ownership, access to economic opportunities and proximity to amenities. We suggest local government policies that positively influence the conditions of these determinants for sustained mobility of the aspirant middle class over time.  相似文献   
292.
    
The need to detect fentanyl and its analogs in the field is an important capability to help prevent unintentional exposure or overdose on these substances, which may result in death. Many portable methods historically used in the field by first responders and other field users to detect and identify other chemical substances, such as hazardous materials, have been applied to the detection and identification of these synthetic opioids. This paper describes field portable spectroscopic methods used for the detection and identification of fentanyl and its analogs. The methods described are automated colorimetric tests including lateral flow assays; vibrational spectroscopy (mid-infrared and Raman); gas chromatography–mass spectrometry; ion mobility spectrometry, and high-pressure mass spectrometry. In each case the background and key details of these technologies are outlined, followed by a discussion of the application of the technology in the field. Attention is paid to the analysis of complex mixtures and limits of detection, including the required spectral databases and algorithms used to interrogate these types of samples. There is also an emphasis on providing actionable information to the (likely) non-scientist operators of these instruments in the field.  相似文献   
293.
    
In November 2022, the European Commission presented its Drone Strategy 2.0 with two main objectives: to build the European Union's (EU's) drone service market and to strengthen the Union's civil, security and defence industry capabilities and synergies. From the Commission's perspective, accelerating the integration of drones in Europe's airspace has the potential to enable progress on numerous policy objectives, such as the green transition, urban mobility, industrial renewal and cutting-edge R&D in the civil–military domain. In this commentary, though, we argue that the Strategy is indicative of wider contemporary trends in EU policy-making regarding cross-cutting policy agendas, industry-centred R&D ambitions and the identification and promotion of infrastructural goals enabling further civil–military co-operation. These tendencies capture the growing importance of dual-use technologies, both in society at large and in the security and military domains. This is particularly relevant in the current European context of growing military expenditure with the war in Ukraine.  相似文献   
294.
    
A major shift of geostrategic visions from territorial dimensions to maritime trajectories for China and India has made the study of Asian maritime spaces significant. In spite of strong historical connectivities, the maritime space of Bay of Bengal separated nation‐centric postcolonial states and became divided into zones, promoting geopolitical demarcations that have subsequently become deeply embedded in academic, political, and public discourses. This article attempts to examine the emergence of new economic and geostrategic horizons in this maritime space, a space that may well become a powerful pivot of a rising Asia. It proposes paradigm shifts in scholarly discourses in and around the Bay, distinct from the prism of conventional western historiography and the narrative of South‐Southeast Asia divergences. A trajectory of renegotiations in the understanding of flows and networks is envisaged, implying a strong possibility of this waterscape emerging as a specialized area of study, and thus a rethinking of scholarship and pedagogy in Asian studies.  相似文献   
295.
    
As the connection between an individual’s socioeconomic status and electoral participation originates from the socialization process in childhood and adolescence, inequalities in voting are often argued to be relatively stable throughout the life cycle. However, social mobility during adulthood may mitigate the effects of family background. Using individual-level register-based data, this study examines the extent to which changes in adults’ social class and income between 2000 and 2011 influenced voting propensity in the 2012 Finnish municipal elections. The results show that turnout among socially mobile voters settles between the stable members of their socioeconomic group of origin and destination. Our findings imply that intra-generational social and economic mobility can constrain the socioeconomic gradient in turnout.  相似文献   
296.
    
Scholars have long debated the relative merits of site-based, subsidized housing owned and operated by a public entity or by the private sector. This is the first study to classify long-term residential trajectories of nationally representative low-income households in the United States by their initial assisted housing status. We employ a matched sequence analysis of neighborhood poverty and racial trajectories of low-income households in the Panel Study of Income Dynamics who formed during 1988–1992. Among households carefully matched by their demographic and economic attributes, we find that those first forming households in public housing spend much longer durations over the subsequent 20 years in poorer, minority dominant neighborhoods than similar households first forming in market-rate housing do. In contrast, forming a household in private site-based subsidized housing is associated with superior neighborhood socioeconomic (but not desegregated racial composition) trajectories compared with starting in market-rate housing. Implications for housing policy are discussed.  相似文献   
297.
在国家“六稳”、“六保”的政策目标下,稳定房价具有较大现实意义。基于中国267个地级市2006-2018年的面板数据,通过联立方程模型实证研究地方财政支出、人口迁移以及预期对房价的影响。结果显示,市场对房价上涨的预期是推升房价上涨的主要因素,此外,全国层面的房价受到地方财政支出资本化的正向作用,东、中部地区房价受到人口迁移数量的显著影响,西部地区房价受到第三产业占比的支撑。因此,稳定房价的关键途径是维持购房者的市场信心,确保人口流入有助稳定东、中部地区房价?确保第三产业发展则是 稳定西部房价的重要途径。  相似文献   
298.
Hilary Perraton 《圆桌》2019,108(4):411-422
ABSTRACT

Higher education, and international student mobility, have expanded in 60 years since the Commonwealth Education Conference of 1959. It established a Commonwealth Scholarship and Fellowship Plan which has funded and moved early-career scholars and mid-career fellows between Commonwealth member countries. It has done so in a context in which the number of students moving between Commonwealth countries has grown but this intra-Commonwealth movement has shrunk as a proportion of the total, just as the Commonwealth has lost its political and economic significance. The scholarship plan expanded up to the 1990s, with students travelling from virtually all Commonwealth countries, mainly but not entirely to Australia, Britain, Canada and New Zealand. From the 1990s the plan has shrunk with Australia and Canada ending their awards and Britain limiting them to developing countries. Its purpose has moved from one of promoting Commonwealth cohesion to one of supporting development within the south. Its history demonstrates the way in which changing political circumstances have driven student mobility and shaped its geography.  相似文献   
299.
    
ABSTRACT

Increasingly, studies are considering Central Asia a ‘hot spot’ of climate change and a region prone to environmental migrations. Growing aridity and the shrinking of glaciers may have important impacts on food security, health, human security and infrastructure in the region and compel people to move. Drawing on the literature on environmental issues in Central Asia and on interviews conducted in the Kuhistoni-Badakhshan Autonomous Region of Tajikistan, this article provides a literature survey on environmental migrations in the region and positions Central Asia in the current debates within the broad environmental migrations literature. The article shows that environmental issues can stand out as an important push factor for out-migration in Central Asia, highlights the important role of the Soviet heritage of environmental management as well as of post-Soviet socio-economic transformations in understanding these issues, and discusses possible adaptation strategies.  相似文献   
300.
    
ABSTRACT

This article addresses reconfigurations of urban space in Central Asia through the lens of marshrutka mobility. Marshrutka-based transport is – together with the bazaar trade – a major sector of Central Asian economy. Although precise data are not available, estimates propose that one family in ten gains its income through it. In spite of its economic and social importance, there has barely been any research on marshrutka mobility so far. The marshrutka mobility phenomenon appears at once wide-ranging and elusive. In order to grasp its complexity, we propose a theory framework based on John Law's concept of fluidity and assemblage. Providing empirical insights from Khujand, in northern Tajikistan, the article addresses marshrutka mobility from a local perspective, notably with regard to regulatory processes of marshrutka-based transport. It also covers the trans-local perspective, with particular attention to global flows of ideas, vehicles, and people.  相似文献   
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