全文获取类型
收费全文 | 3481篇 |
免费 | 218篇 |
国内免费 | 15篇 |
专业分类
财政金融 | 331篇 |
工业经济 | 182篇 |
计划管理 | 990篇 |
经济学 | 628篇 |
综合类 | 344篇 |
运输经济 | 40篇 |
旅游经济 | 84篇 |
贸易经济 | 476篇 |
农业经济 | 267篇 |
经济概况 | 372篇 |
出版年
2024年 | 18篇 |
2023年 | 90篇 |
2022年 | 77篇 |
2021年 | 106篇 |
2020年 | 173篇 |
2019年 | 114篇 |
2018年 | 117篇 |
2017年 | 121篇 |
2016年 | 124篇 |
2015年 | 147篇 |
2014年 | 267篇 |
2013年 | 458篇 |
2012年 | 352篇 |
2011年 | 349篇 |
2010年 | 265篇 |
2009年 | 198篇 |
2008年 | 138篇 |
2007年 | 129篇 |
2006年 | 114篇 |
2005年 | 81篇 |
2004年 | 60篇 |
2003年 | 56篇 |
2002年 | 38篇 |
2001年 | 46篇 |
2000年 | 23篇 |
1999年 | 13篇 |
1998年 | 7篇 |
1997年 | 8篇 |
1996年 | 9篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1991年 | 1篇 |
1990年 | 3篇 |
1988年 | 3篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1981年 | 1篇 |
1979年 | 1篇 |
排序方式: 共有3714条查询结果,搜索用时 31 毫秒
111.
Health tourism is a broad concept that incorporates both medical and wellness tourism. Sareyn, city of Ardabil province, is one of the largest and the most diverse cities for health tourism. Although health tourism in Iran is in its infancy, it can offer new opportunities, and strengthen the overall competitiveness of Iran's tourism industry. In this paper, by using strengths, weaknesses, opportunities and threats (SWOT) analysis, the strengths and opportunities for sustainable health tourism are determined. Also, weaknesses and threats are recognized; finally, guidelines for efficiently using the strengths and transforming the weaknesses into opportunities and strengths are presented. 相似文献
112.
This article presents the results of the system dynamics modelling of the regional market of health tourism in the Krasnodar region of Russia. The research was based on various indicators characterizing the supply and demand for this type of tourism for years 2006–2012. The medium-term forecast made by constructed model shows a possible decrease in number of health tourists and income of sanatorium organizations. Price competition of inexpensive foreign resorts was a key factor influencing the market of tourist services; therefore ruble devaluation to US dollar may improve the prognostic indicators. 相似文献
113.
Indoor air quality in mass catering plants: Occurrence of airborne eumycetes in a university canteen
The present study aimed to investigate the viable eumycetes population of indoor air sampled in a mass catering plant that produces up to 1200 meals per day. The combination of a culture-dependent and -independent approach applied in the food-processing environment was efficient for the identification of airborne eumycetes. Penicillum, Cladosporium and Alternaria were the dominant genera, while Thysanophora, Aspergillus, Rhizopus, Annulohypoxylon, Arthrinium, Aureobasidium and Trametes were found to be in minority. The size and composition of the eumycetes population found in this study do not raise specific concerns. Nevertheless, a quantitative and qualitative monitoring of these bioaerosol should be included in the progress and criticality reports of the HACCP system in the catering services where eumycetes can pose different risks, such as worsening of the overall quality of meals and/or of the work environment. Indeed, these reports are a useful tool in the preventive HACCP approach, provided that an adequate frequency of sampling is planned in order to quicken the pre-warning process. 相似文献
114.
We describe counterfeiting activity as the issuance of private money, one that is difficult to monitor. Our approach, which amends the basic random‐matching model of money in mechanism design, allows a tractable welfare analysis of currency competition. We show that it is not efficient to eliminate counterfeiting activity completely. We do not appeal to lottery devices, and we argue that this is consistent with imperfect monitoring. 相似文献
115.
Forouzan Rezapur-Shahkolai Abbas Moghimbeigi Seyed Mohammad Mahdi Hazavehei 《International journal of injury control and safety promotion》2017,24(3):354-362
This cross-sectional study was conducted in rural areas of Twiserkan (Toyserkan) County, in Iran, to assess factors associated with home-related injuries among under-five-year children and their mothers’ care regarding injury prevention. Mothers who had their under-five-year-old children injured within a 12-month period were identified from recorded information in Twiserkan Health Center. Then, data were gathered using pre-tested questionnaire and through interview with injured children's mothers. The questions were about characteristics of the children's injuries and their mothers’ care regarding injury prevention, using PRECEDE (Predisposing, Reinforcing, and Enabling Constructs in Educational/Environmental Diagnosis and Evaluation) model with focus on knowledge and attitude; enabling and reinforcing factors; and mothers' preventive behaviours. The study results showed that 197 out of 210 total identified mothers took part in the study. The reported injuries were 11.68%, 39.09%, and 49.24%, respectively, for severe, moderate, and mild cases. Fall was the most frequent injury with 35%. Among PRECEDE model constructs, there was a statistically significant correlation between mothers' knowledge and injury severity among children. Home-related injuries are an important health problem among study population and their prediction and prevention are necessary. Enhancement of mothers’ knowledge can be helpful to improve child injury prevention. 相似文献
116.
Subha Mani 《Asian Economic Journal》2014,28(1):81-104
This paper characterizes the socioeconomic determinants of child health using height‐for‐age z‐score (HAZ), a long‐run measure of chronic nutritional deficiency. We construct a panel data that follows children between ages 3 and 59 months in 1993 through the 1997 and 2000 waves of the Indonesian Family Life Survey. We use this data to identify the various child‐level, household‐level and community‐level factors that affect children's health. Our findings indicate that household income has a large and statistically significant role in explaining improvements in HAZ. We also find a strong positive association between parental height and HAZ. At the community level, we find that provision of electricity and the availability of paved roads are positively associated with improvements in HAZ. Finally, in comparison to community‐level factors, household‐level characteristics play a large role in explaining the variation in HAZ. These findings suggest that policies that address the demand‐side constraints have greater potential to improve children's health outcomes in the future. 相似文献
117.
Katherine A. Broughton Toni Liechty 《Leisure Sciences: An Interdisciplinary Journal》2013,35(3):261-276
Recreation professionals continually strive to serve a host of diverse program constituents, while leisure researchers attempt to uncover barriers to leisure participation. Much of the barriers or constraints research has come from the perspective of program participants. This study identified, from the perspectives and experiences of 18 recreation professionals, the issues and barriers that they perceive inhibit recreation program access and availability to diverse constituents, particularly ethnic minority populations. Co-cultural theory, which integrates the concepts of muted group theory and standpoint theory, was utilized as the study's theoretical framework. In-depth interviews were utilized. Five primary barriers were identified that related to the changing faces of the community, the changing faces of management and staff, deferred program responsibility, language barriers, and negative attitudes and stereotypes held by some management and staff. This article demonstrates how these barriers impact leisure participation for disenfranchised groups. The findings suggest that recreation agencies, often unwittingly or unknowingly, foster organizational barriers that inhibit the perceived program accessibility or attractiveness to ethnic minorities. Implications for research and professional practice are explored. 相似文献
118.
本文从盆栽花卉可以释放氧气、吸收有害气体和调节室内温湿度等五个方面简要介绍盆栽花卉改善室内环境和调节人的身心健康。 相似文献
119.
120.
安全监视系统(TSI)是保证汽轮机安全稳定运行的保护系统,包括对汽轮机转子的运行状况进行可靠的连续检测、对汽缸的机械工作参数连续地测量,记录机组启停和运行状态。通过各种TSI探头,汽轮机运转过程中的工况变化产生电信号输入到前置器,为记录、记忆设备提供信号。 相似文献