自限温电加热带在混凝土施工中的应用

介绍了自限温电加热带和相关技术在冬季环境混凝土构件养护施工和主动控制缓粘结预应力筋的缓粘结剂固化期这两种施工技术中的应用。自限温电加热这项技术的应用,使得对冬季混凝土养护环境温度和施工条件的要求大幅度降低,满足越来越复杂的冬季建筑结构施工工艺及施工环境。同时将该技术创新的应用于缓粘结预应力筋的施工中,起到主动控制缩短缓粘结剂固化期作用。     

新形势下黑胚小麦病及检验研究

黑胚小麦病又被称为小麦黑点病,是一种在小麦胚或其他部位出现变色的病害。文章主要论述了我国在新形势下对黑胚小麦病的研究及其流行规律和病因,同时阐述了新疆粮油产品质量监督检验站在应对黑胚小麦病上的检验措施。     

Mix between Satisfaction and Attributes Destination Choice: A Segmentation Criterion to Understand the Ski Resorts Consumers

This study examined the attributes prioritized by tourists when choosing a winter sports destination and their degree of satisfaction with the services provided by Portugal's only ski resort. Two hundred tourists completed a questionnaire with factor analysis then deployed to extract the data that served as the basis for cluster analysis. Our results report discrepancies between the attributes valued by tourists when choosing winter sports destinations and their degree of satisfaction with the ski resort's services. Moreover, the combination between attributes/motivations prevailing in destination selection and the subsequent satisfaction with the services provided may generate information of relevance to evaluating organizational competitiveness. Copyright © 2014 John Wiley & Sons, Ltd.     

集成化大宗农产品供应链模型与应用

集成化农产品供应链管理是农产品供应链管理的核心内容,有效的农产品供应链可以解决农产品供应链的链接松弛问题,有助于我国"三农问题"的解决。建立农产品供应链结构模型是集成供应链的首要步骤,分析完全竞争下大宗农产品的特点和农产品供应链过程及关系,构建有效供应链的分析原则,对更有效的农产品供应链建立有借鉴意义。     

Price relationships between qualitatively differentiated agricultural products: organic and conventional wheat in Germany

Organic agriculture, which produces commodities that can be qualitatively differentiated from conventional food products, has grown into an important market in many countries. The dynamics of commodity prices in both sectors are partly interdependent, but are also shaped by independent determinants and have rarely been studied. We analyze organic food markets and their interdependencies with conventional markets in the context of wheat markets in Germany, which have been subject to a number of fundamental changes during the last two decades. Based on institutional market characteristics, we suggest a flexible Markov‐switching asymmetric time series model. We find a pronounced temporal sequence of market phases that differ in their asymmetric dynamics and the extent to which the organic price is influenced by the conventional price. Organic wheat prices tend to be increasingly connected to prices of conventional wheat.     

延吉冬季旅游开发对策研究

为加速延吉市旅游业的快速发展,全面开发建设冬季旅游迫在眉睫;在延吉市旅游业蓬勃发展的大背景下,针对延吉市冬季旅游开发中存在的优势、劣势、机会、威胁,提出了延吉市冬季旅游开发的对策。     

The power of video to trigger innovation: rice processing in central Benin

Participatory plant breeding began in developing countries and now some European farmers and scientists are proposing its suitability in contributing to sustainable agriculture. This paper uses both genetics and sociology to determine the conditions required. A review of the sustainability of projects implemented in developing countries initiated discussion of an organic durum wheat participatory breeding programme, which is currently being implemented in the south of France. The analysis highlighted the need for the critical participation of experts from different horizons in a socio-technical network. Multi-level interactions and cross-linked learning processes about breeding methods and sociological concepts are needed for effective communication between different stakeholders and scientific disciplines. This approach enables implementation of a range of different action systems in which the production of relevant knowledge and rules addresses the issue of the sustainable development of diverse agro-food systems, rather than the generalization of one model.     

寒地林业小城镇用地生态调整对策

寒地林业小城镇是资源再生型城镇,是我国小城镇中比较特殊的一类群体,随着资源面临枯竭与林业政策的调整,城镇发展逐渐陷入困境。采用统计分析法,对用地进行定性和定量分析,对林区小城镇用地调整提出3点对策建议,保证城镇用地性质的连续性、灵活性和弹性,这对小城镇用地调整具有重大的指导作用。     

Modeling and Extrapolating Wheat Producer Support Using Income and Other Factors

Using wheat market support data from 55 countries for 1961–2011 from the World Bank Agricultural Distortion database, we develop a fixed effect model that shows a more complicated, nonlinear relationship between income and wheat support and its components than previously realised. We find that income generally has a greater effect on border market price support than on domestic price support. Moreover, the difference between these types of support is greater for net importers than for net exporters and has increased with the URAA or WTO accession. Holding other variables constant, the wheat support level of China, driven mainly by border market price support, is projected to rise with future income growth. Meanwhile, Japan is projected to maintain its high level of support, while the US and EU are projected to maintain their lower levels of support. These results are relevant in the context of multilateral trade negotiations, arguing against a narrow focus on past or current policy profiles and for long‐run analyses that might mistakenly rest on the inconsistent assumptions of constant agricultural policies against the backdrop of rising incomes.     

System of crop intensification for more productive,resource-conserving,climate-resilient,and sustainable agriculture: experience with diverse crops in varying agroecologies

With continually increasing demand for food accompanied by the constraints of climate change and the availability and quality of soil and water, the world’s farmers are challenged to produce more food per hectare with less water, and with fewer agrochemical inputs if possible. The ideas and methods of the system of rice intensification which is improving irrigated rice production are now being extended/adapted to many other crops: wheat, maize, finger millet, sugarcane, tef, mustard, legumes, vegetables, and even spices. Promoting better root growth and enhancing the soil’s fertility with organic materials are being found effective means for raising the yields of many crop plants with less water, less fertilizer, reduced seeds, fewer agrochemicals, and greater climate resilience. In this article, we review what is becoming known about various farmer-centred innovations for agroecological crop management that can contribute to agricultural sustainability. These changes represent the emerging system of crop intensification, which is being increasingly applied in Asian, African, and Latin American countries. More research will be needed to verify the efficacy and impact of these innovations and to clarify their conditions and limits. But as no negative effects for human or environmental health have been identified, making these agronomic options more widely known should prompt more investigation and, to the extent justified by results, utilization of these methodologies.