Regional inequality: An analysis under the core–peripheral model

Desmet, Gumpert, and Ort?n have analyzed regional development using the Ricardian model or the Heckscher–Ohlin theorem. However, aspects such as consideration of combined wages, substitution elasticities, marginal costs, fixed costs, and number of companies were completely ignored. This study investigates the underdevelopment of regions in light of Krugman`s core–peripheral model. The extension of the model is intended to analyze the aspects that have so far been ignored and their influence on the benefits of the two regions. The following aspects characterize the model. Two regions with two sectors are considered for the model. The regions are characterized by different technological equipment. The first region is industrial. The second region has an agricultural character. When a new technology is available, both regions can benefit under certain conditions. The financial transfers lead to a convergence of wages.     

The analysis of China wind power industry

The development course of China wind power industry is reviewed by six stages. National policies on wind power industry are elaborated from the aspects of laws & regulations, planning, finance & taxation and electrovalence policy. And these policies have played an important supporting and regulating role in the development of wind power industry. The development status of China wind power industry is analyzed based on wind turbine installed capacity, wind power output and their growth rate. It is explained that national wind turbine manufacturers have kept developing and become strong by the data of new global installed capacity share of mainland wind turbine manufacturers in 2013 and the new global market share of 8 domestic enterprises among the world top 15 wind turbine manufacturers. But there are still 5 key problems which influence the development of national wind turbine need to be solved, including lack of top-level design, abandon and restriction wind power seriously, lack of R&D abilities, some of the key parts relying on imports and wind turbine facing a quality guarantee dilemma. Taking Sinovel Wind Group Co. Ltd. and Xinjiang Goldwind Sci & Tech Co. Ltd., the two leading companies as an example, their performance is analyzed and it’s pointed out that the wind industry must keep vigilant after the overspeed development. The enterprises should try to avoid neglecting cultivating their inner core competitive ability, including technology advancements and products reliability. Occupying the market with low price competition and expanding blindly is also not desirable. At last, the development prospects of our country’s wind power industry are analyzed and three proposals are put forward.     

2014年棉花市场形势分析与展望

在政策调控下,2014年国内棉花供给充裕,市场需求整体疲软。棉花进口量大幅回落,纺织品服装出口增速明显回落。受需求不足以及棉花目标价格试点政策实施影响,国内外棉价大幅下降,内外价差明显缩小。后期国内外市场仍将维持弱势震荡格局。受棉价持续走低影响,全球棉花产量预计下降1.6%,中国棉花收获面积下降7.5%。     

黑杨派南方型新无性系纸浆材材性株内变异规律

系统研究了来自浙江临海黑杨派南方型新无性系试验林２０个无性系的纸浆材主要木材性状。结果表明：黑杨派新无性系树干的纤维长度自上而下逐渐增长,树冠上部枝条的纤维较中、下部枝条为短;树干木材的基本体积质量则以下部的为高,上部稍大于中部;树枝条的基本体积质量,以树冠下部的为最小,自下而上增大。不同树干部位木材纤维的长短频率分布均匀且遵从正态分布。树干纤维长度均值差异主要表现在组中值０．７ｍｍ以下和１．３ｍ     

咸宁市农业清洁生产技术实践与生态补偿政策案例分析

农业清洁生产是防治农业面源污染、保护水环境、遏制生态环境恶化,节能减排、增效增收,促进现代农业和社会可持续发展的必然选择。通过在咸宁市开展农业清洁生产技术实践与生态补偿政策研究,总结出了茶叶-桂花套作有机种植模式、猪-沼-菜循环农业模式、休闲观光有机果园模式和葡萄生态种植模式等立体种养模式,为建立我国农业生态补偿法律法规和政策措施提供了经验借鉴。     

Fisheries management in inland and coastal waters in Denmark from 1987 to 1999

Fishing is a major recreational activity in Denmark, involving both inland and coastal waters. Anglers, aged 18–67, and amateur fishermen, aged 12–67, must hold a valid fishing permit. Fees are used for stocking, river restoration and fisheries research. All proposals for stocking inland waters require stocking plans based on the carrying capacity of the aquatic habitat in question. All stocking is undertaken using hatchery-reared fish that are the offspring, either of wild fish caught in nature for subsequent stripping, or of more or less domesticated fish stocks that have lived in captivity for several generations. Stocking is also subject to genetic guidelines. This paper reviews the status of fisheries in Danish inland waters, their regulation, socio-economic aspects, stocking, aquaculture and the main problems and trends.     

基于“生产-生态-区位”的都市区粮田布局方法

一定规模的粮田对保障都市区粮食供应、营造城市景观等具有重大意义。以北京市平谷区为例,依据永久基本农田保护要求,首先提取允许建设区内的基本农田作为粮田优先划入区;其次,以耕地图斑为评价单元,从粮食生产能力、生态安全能力和区位条件3方面构建评价模型,对优先划入区外的耕地图斑进行定量评价;结合定量评价结果,最终确定平谷区粮田空间布局。结果表明:平谷区优先划入区的粮田面积为1 427.26 hm~2,占区域耕地总面积的11.62%,主要分布在平谷县城与各镇中心周边;基于综合评价分值将优先划入区外的耕地划分为适宜划入区、储备划入区和不宜划入区3种类型,其中,适宜划入区主要分布在平谷县城东侧的地势平坦区域,并与优先划入区构成平谷区粮田的首选区域;储备划入区作为粮田储备可选区域,主要分布在县城的西部和南部乡镇;而不宜划入区空间分布零散,主要分布在地势较高、地形坡度较大的县城北部地区。由此形成的生产-生态-区位三位一体的都市区粮田布局方法可为北京生态涵养发展区的粮田布局提供科学依据。     

基于VB 6.0的生态基流计算软件开发与应用

针对目前河流生态基流量尚无统一的计算平台,各种方法的计算和对比研究较为繁琐等问题,使用Visual Basic 6.0作为开发工具,开发出界面友好,操作简单,交互性强,包含12种水文学、水力学计算方法的河流生态基流量计算软件。该软件不仅简化了生态基流量计算步骤,而且便于不同方法之间的相互比较。使用该软件对渭河关中段进行了实例研究,结果发现不同方法的计算结果差别较大。选择8种单流量计算方法的平均值13.7m3/s作为渭河关中段的生态基流量,选择与研究区流量实际变化情况较为吻合的Texas法计算结果作为渭河关中段月生态基流量序列。该软件的开发与应用为今后河流生态基流量动态计算奠定了基础。     

The Prospects for Integrated Watershed Management in the Panama Canal Watershed

Summary

The Panama Canal is inextricably linked to the Watershed which contains it. Effective policy is critical to manage this resource efficiently. Currently, a myriad of divisions along socio-political, organizational and technical lines are hindering integration of practical knowledge and policy experience. This lack of integration is resulting in inefficient management of the natural resources of the Panama Canal Watershed. This paper will rely on the policy sciences framework to describe, analyze and address this problem. It will begin by highlighting important organizations and their efforts in the Panama Canal Watershed, to understand the social context. Next, the trends and conditions which have shaped the problem will be described, to provide a historical context and help make projections for the future. Finally, alternatives will be presented to address the problem. Some of these options include: prototyping exercises to build practice-based experience, workshops designed to teach integration skills and to provide a common experience base for the participants, and an information coordinator to equalize the flow of information between organizations.     

聚集器式气力集尘装置几个主要设计参数的合理确定

合理确定聚集器的静压、压力平衡基准、聚集器的压力损失、设计流量等参数，对于保证集尘装置工作的可靠性和经济性都有重要意义。