全文获取类型
收费全文 | 3636篇 |
免费 | 86篇 |
国内免费 | 28篇 |
专业分类
财政金融 | 137篇 |
工业经济 | 342篇 |
计划管理 | 1527篇 |
经济学 | 243篇 |
综合类 | 244篇 |
运输经济 | 97篇 |
旅游经济 | 47篇 |
贸易经济 | 528篇 |
农业经济 | 352篇 |
经济概况 | 233篇 |
出版年
2024年 | 11篇 |
2023年 | 33篇 |
2022年 | 107篇 |
2021年 | 152篇 |
2020年 | 114篇 |
2019年 | 39篇 |
2018年 | 54篇 |
2017年 | 76篇 |
2016年 | 154篇 |
2015年 | 105篇 |
2014年 | 379篇 |
2013年 | 408篇 |
2012年 | 346篇 |
2011年 | 434篇 |
2010年 | 335篇 |
2009年 | 226篇 |
2008年 | 177篇 |
2007年 | 155篇 |
2006年 | 125篇 |
2005年 | 92篇 |
2004年 | 63篇 |
2003年 | 39篇 |
2002年 | 32篇 |
2001年 | 31篇 |
2000年 | 17篇 |
1999年 | 13篇 |
1998年 | 9篇 |
1997年 | 5篇 |
1996年 | 8篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1992年 | 3篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1981年 | 1篇 |
排序方式: 共有3750条查询结果,搜索用时 31 毫秒
101.
Grigore M. Havârneanu Jean-Marie Burkhardt Anne Silla 《International journal of injury control and safety promotion》2017,24(4):469-486
Suicides and trespassing accidents result in more than 3800 fatalities in Europe, representing 88% of all fatalities occurring within the EU railway system. This paper presents a problem-solving model, which consists of a multistep approach structuring the analysis of a suicide or trespass-related problem on the railways. First, we present the method used to design, evaluate and improve the problem-solving model. Then we describe the model in detail: it comprises six steps with several subsequent actions, and each action is approached through a checklist of prompting questions and possible answers. At the end, we discuss the added value of this model for decision makers and its usability in the selection of optimal prevention measures. 相似文献
102.
Kenneth Amaechi Agu Vincent Chidi Enemuo Linda Oge Okoye Okechukwu Onwuasoigwe 《International journal of injury control and safety promotion》2017,24(4):487-492
Studies from parts of Nigeria reported low compliance with seatbelt. This study sought to establish driver seatbelt use in Enugu, Nigeria by gender, vehicle type/use and time of day. Observations were done day and night at randomly selected locations. Data were analysed with SPSS version 15. Differences in response were checked with chi-square for trend. Confidence interval was 95% and P value < 0.05 was regarded as significant. Average compliance was 37.6% for the 510 males (85%) and 90 females (15%) observed. It was 74.8% in the day and 0.3% at night. Among males, 218 (42.7%) wore seatbelt while 9 (10%) females did. For commercial drivers 159 (65.2%) complied while 68 (19.1%) private drivers did. Truck drivers had 100% compliance while sports utility vehicle drivers had the lowest (18.8%). There is poor seatbelt compliance in Enugu, Nigeria and need for educational campaigns and stricter enforcement. 相似文献
103.
《Food Policy》2017
Food safety systems in emerging markets are currently facing a transformation period, becoming more stringent because of an increasing demand for safer food. Consequently, policy makers need to find strategies to increase food safety while giving the industry time to improve their performance. In Thailand, policy makers have adopted the strategy of upgrading food safety standards gradually. Government and private food safety brands and labels were introduced onto the market but little is known whether Thai consumers have preferences for them or not. This study is aimed at evaluating Thai consumers’ preferences for food safety labels and brands on fresh produce, using a surveyed based on discrete-choice experiments. A sample of 350 Thai consumers was surveyed in Bangkok and Nonthaburi in 2013. Quota sampling according to the shopping outlets and convenience sampling methods were adopted. Two hundred respondents were recruited at fresh-food markets and 150 respondents were recruited at supermarkets. We found that consumers are willing-to-pay more for both government led food safety label and private brands, but that there is high heterogeneity in their preferences. The high degree of social desirability for food safety labels confirms that food safety labelling policy should be supported. However, the provision of information and credibility are vital in order to mitigate the risk of consumer deception by self-claimed labels. 相似文献
104.
George Yannis Eleonora Papadimitriou Petros Evgenikos Anastasios Dragomanovits 《International journal of injury control and safety promotion》2016,23(4):373-387
The paper presents the findings of a research project aiming to quantify and subsequently classify several infrastructure-related road safety measures, based on the international experience attained through extensive and selected literature review and additionally on a full consultation process including questionnaire surveys addressed to experts and relevant workshops. Initially, a review of selected research reports was carried out and an exhaustive list of road safety infrastructure investments covering all types of infrastructure was compiled. Individual investments were classified according to the infrastructure investment area and the type of investment and were thereafter analysed on the basis of key safety components. These investments were subsequently ranked in relation to their safety effects and implementation costs and on the basis of this ranking, a set of five most promising investments was selected for an in-depth analysis. The results suggest that the overall cost effectiveness of a road safety infrastructure investment is not always in direct correlation with the safety effect and is recommended that cost–benefit ratios and safety effects are always examined in conjunction with each other in order to identify the optimum solution for a specific road safety problem in specific conditions and with specific objectives. 相似文献
105.
随着现代制造技术的不断发展,我国数控车床测头系统的开发也得到发展。本文分析了测头系统的作用、组成及工作原理,以在数控车床上自动在线测量孔直径为例,介绍了测头系统测量程序的编制方法,使数控机床的操作变得更加简单、便捷、精确、高效,同时为其他相关程序的编制提供参考。 相似文献
106.
Applying econometric techniques to EU28 panel data and controlling for explanatory variables such as road types, we find that increased truck load capacity does not necessarily aggravate road traffic safety. Specifically, heavy trucks do not seem to be linked with greater numbers of traffic fatalities/accidents, medium trucks appear to be the worst performers in terms of fatalities, and light trucks seem to be the worst for accidents. In summary, our results clarify the complex relationship between truck load capacity and road safety, pointing to the existence of a negative correlation for accidents per capita and an inverse U-shaped curve for fatalities per capita. 相似文献
107.
Maryam Mirhadi Fard Charles J. Kibert Hamed Hakim 《International journal of injury control and safety promotion》2017,24(1):10-23
The US construction industry annually experiences a relatively high rate of fatalities and injuries; therefore, improving safety practices should be considered a top priority for this industry. Modular/prefabricated building construction is a construction strategy that involves manufacturing of the whole building or some of its components off-site. This research focuses on the safety performance of the modular/prefabricated building construction sector during both manufacturing and on-site processes. This safety evaluation can serve as the starting point for improving the safety performance of this sector. Research was conducted based on Occupational Safety and Health Administration investigated accidents. The study found 125 accidents related to modular/prefabricated building construction. The details of each accident were closely examined to identify the types of injury and underlying causes. Out of 125 accidents, there were 48 fatalities (38.4%), 63 hospitalized injuries (50.4%), and 14 non-hospitalized injuries (11.2%). It was found that, the most common type of injury in modular/prefabricated construction was ‘fracture’, and the most common cause of accidents was ‘fall’. The most frequent cause of cause (underlying and root cause) was ‘unstable structure’. In this research, the accidents were also examined in terms of corresponding location, occupation, equipment as well as activities during which the accidents occurred. For improving safety records of the modular/prefabricated construction sector, this study recommends that future research be conducted on stabilizing structures during their lifting, storing, and permanent installation, securing fall protection systems during on-site assembly of components while working from heights, and developing training programmes and standards focused on modular/prefabricated construction. 相似文献
108.
阐述了"主动安全型员工"培育的作用及内涵,并系统分析了煤炭企业员工安全意识及保安能力上的不足,提出了从"意识强化、技能升级、行为管控、文化熏陶"等4种关键环节上培育主动安全型员工的方法。 相似文献
109.
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
110.
随着商业超市规模越来越大,发展速度也越来越快,超市消防安全的问题也日益严重,所以超市消防安全的管理,必须引起消防监督人员的充分注意。 相似文献