全文获取类型
收费全文 | 214篇 |
免费 | 8篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 8篇 |
工业经济 | 16篇 |
计划管理 | 23篇 |
经济学 | 23篇 |
综合类 | 11篇 |
运输经济 | 1篇 |
贸易经济 | 49篇 |
农业经济 | 80篇 |
经济概况 | 12篇 |
出版年
2023年 | 1篇 |
2022年 | 5篇 |
2021年 | 14篇 |
2020年 | 7篇 |
2019年 | 4篇 |
2018年 | 4篇 |
2017年 | 8篇 |
2016年 | 14篇 |
2015年 | 3篇 |
2014年 | 13篇 |
2013年 | 32篇 |
2012年 | 6篇 |
2011年 | 19篇 |
2010年 | 14篇 |
2009年 | 13篇 |
2008年 | 11篇 |
2007年 | 6篇 |
2006年 | 2篇 |
2005年 | 9篇 |
2004年 | 8篇 |
2003年 | 6篇 |
2002年 | 6篇 |
2001年 | 1篇 |
2000年 | 3篇 |
1999年 | 2篇 |
1998年 | 6篇 |
1996年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1991年 | 1篇 |
1986年 | 1篇 |
1984年 | 1篇 |
排序方式: 共有223条查询结果,搜索用时 15 毫秒
1.
2.
近年来,我国牛奶加工产业有了迅猛发展,但也存在一些问题,如液态奶加工中的“过度加热”问题。本文通过对过度加热液态奶的判定模式进行探究,分析“过度加热”的危害,总结在液态奶加工中出现“过度加热”的原因,以促进液态奶合理加工,推动我国乳业健康发展。 相似文献
3.
Perceptions of older consumers regarding food packaging as a prerequisite for its improvement: A case study of Polish market 下载免费PDF全文
Jarosław Świda Michał Halagarda Stanisław Popek 《International Journal of Consumer Studies》2018,42(3):358-366
In many societies, the scale of demographic change associated with increased longevity has the potential to influence the market for consumer goods. As a result, continuous improvement in packaging design that takes into account the needs of older people should become an important challenge for both packaging producers and product manufacturers. Due to the fact that there is limited research concerning the design of food packaging for older people, the aim of the study was to identify the expectations of this group of consumers in this respect. Milk packaging was selected as a model subject of study. Factors influencing older consumers and their buying patterns when purchasing milk have been thoroughly examined. The research was conducted among people over the age of 60 with the use of three methods: a questionnaire (600 subjects), an in‐depth interview (60 subjects) and eye tracking (30 subjects). The results of the study show that older consumers have specific preferences regarding packaging type and design. When considering milk packaging, for example, they prefer glass bottles, simple graphics and font and subdued colours. They most frequently look for information concerning the product's expiration date, its producer's name and its composition. Eye tracking revealed that the older the consumers are, the more problems with finding expiration date they have. The time required to find such information, however, strongly depends on where exactly the expiration date is printed on the packaging. The preferred place in this case is the top of the bottle. Older consumers identify product's brand with the name of the producer. Moreover, the absence of the term ‘ingredients’: on the milk packaging oftentimes causes confusion among older people, who are concerned about potential food additive content. 相似文献
4.
5.
Optimal surveillance against foot‐and‐mouth disease: the case of bulk milk testing in Australia 下载免费PDF全文
Tom Kompas Pham Van Ha Hoa Thi Minh Nguyen Iain East Sharon Roche Graeme Garner 《The Australian journal of agricultural and resource economics》2017,61(4):515-538
Previous foot‐and‐mouth disease (FMD) outbreaks and simulation‐based analyses suggest substantial payoffs from detecting an incursion early. However, no economic measures for early detection have been analysed in an optimising framework. We investigate the use of bulk milk testing (BMT) for active surveillance against an FMD incursion in Australia. We find that BMT can be justified, but only when the FMD entry probability is sufficiently high or the cost of BMT is low. However, BMT is well suited for post‐outbreak surveillance, to shorten the length of time and size of an epidemic and to facilitate an earlier return to market. 相似文献
6.
The policy environment for the Irish agri‐food sector could change rapidly in the coming decade. A potentially positive factor will be the elimination of milk quotas in 2015, although a potentially negative factor will be further trade liberalisation and increased import competition. These changes come on top of the move to decouple direct aids to farmers in 2005 as part of the Mid‐Term Review of the EU's Common Agricultural Policy agreed in 2003. This paper examines these reforms and their impacts on the Irish economy and income distribution using a CGE model particularly rich in detail on the agri‐food sectors, differentiated household groups, and agricultural policy instruments including their links to productive factors and households. The results suggest that the past and projected changes in the policy environment have, in sum, a small positive impact on GDP and household income. However, the gains and losses are unequally distributed across sectors and household groups due to the highly differentiated distribution of support and protection. Although all households generally gain from the sequence of policy reforms in the long run, some experience strong adverse effects from particular reforms and in the medium term. 相似文献
7.
本文通过分析功能性现状,研究婴儿奶粉包装形式等的研发拓展,更好地展现其启智和环保等功能,改善婴儿奶粉包装现状。以调查分析为基础,以拓展包装功能,创新包装形式为开发研究依据,通过对于婴儿奶粉包装的重新定位,采用五大创新拓展功能在婴儿奶粉包装中的应用,满足婴儿对于奶粉包装需求的同时也从大环境的角度整体探究婴儿奶粉包装更人性化的发展诉求。 相似文献
8.
介绍了蛋白质和改性蛋白质溶胶的流变特性,指出蛋白质溶胶的流变特性主要为非牛顿流体的假塑性流体,且其流变特性受诸多因素的影响;蛋白质经过改性后,流动性有较大的改善。最后概述了蛋白质溶胶流变特性方面的应用。 相似文献
9.
基于四川省汽车制造与汽车零部件发展概况,对四川汽车零部件供应物流特征进行分析,描述了汽车供应物流的运作流程。以四川一汽丰田为例,介绍了目前四川汽车制造业CKD零部件和国产零部件的物流组织,指出目前依托我国长江水运的新人川物流通道逐渐形成。随着四川省配套零部件产业的发展,未来四川汽车制造将基本实现本土化、准时化供应。 相似文献
10.
蛋白质是组成人体结构成分和酶等特殊的功能性物质,并在生命过程中发挥着关键性作用。它是人体的主要成份之一,也是人体内部进行各种代谢活动的物质基础。蛋白质在机体内的存在形式和作用是多样化的,与运动个体的肌肉力量和肌肉蛋白合成紧密相关。在运动过程中,骨骼肌收缩活动会影响蛋白质和氨基酸代谢,这种运动的影响还延续到运动后。 相似文献