The Asian clam Corbicula fluminea in the European freshwater-dependent industry: A latent threat or a friendly enemy?

While the biofouler Corbicula fluminea (Müller, 1774) is known to cause great economic losses in North America, studies reporting the problem in Europe are much scarcer. This paper explores the industrial effects of the species in Portugal, the gateway by which the bivalve entered Europe around 30 years ago. National waterworks, major power stations, cement plants, pulp and paper mills and irrigation systems were surveyed. The industrial impacts of the pest were shown to remain relatively mild; irrigation systems are those that seem to be facing more significant economic losses due to infestation. Possible reasons for the apparent discrepancy between this result and the species dispersal in natural ecosystems are discussed, and recommendations on adequate responses to the latent threat are provided. This study may assist the implementation of integrated pest management policies in countries at risk of invasion or recently invaded, and contribute to an understanding of the species’ progression in industrial environments.     

乡村精英在低保分配中的行动逻辑——以湖北省J村为例

农村最低生活保障制度是现代社会保障体系的重要组成部分,是促进农村经济发展和维护社会稳定的客观需要。在低保分配过程中,居于"强有力"的位置上的乡村精英利用资源与权力的双重优势实行公共权力的私人化运作,而信息垄断与规则变通则是乡村精英在低保分配中的行动逻辑。     

树立科技矿政理念改革矿政管理制度——以资源储量消耗计征矿产资源税费

科技矿政理念的基本含义就是努力提高矿政管理的科技含量,遵循地质矿产规律,依靠科技进步显著提升我国矿产资源保护与利用水平.推动科技矿政管理进程,首先要从资源储量管理方面夯实基础,建立健全资源储量实物账户与价值账户.进而改革矿产资源权益分配方式,以资源储量消耗计征矿产资源税费.相应改革矿业权评估制度.     

论公平分配实现的微观基础

文章首先在理论上提出初次分配是实现公平分配的基础,强调企业内收入分配制度的改革是在初次分配领域实现公平分配的微观基础上进行,并详细论述了实现企业内公平分配的产权基础,从而为中国解决收入差距过大、实现公平分配提供实践指南。     

鄱阳湖周边经济区生态畜牧业空间格局与发展模式

本文采用区域生态系统发展战略分析法和以空间格局优化为核心的景观格局规划模式,在对鄱阳湖周边经济区畜牧业资源调查基础上,进行全面客观、深入细致的综合评价;制定系统完善、科学实用的草滩湿地畜牧区等5个区功能分区方案,确定区域畜牧业发展重点和方向,以及解决途径与措施。     

区域土地利用规划布局研究进展

该文对国内外区域土地利用规划布局理论与方法的研究现状进行了总结,分别对土地利用规划布局的理论体系、土地利用规划布局的模式、方法进行了分析,进而阐述了区域土地利用规划布局研究存在的不足,提出了以复杂性理论、复杂适应系统理论为指导的复杂空间决策方法,为土地利用空间决策开辟了新思路。     

What kind of marketing distribution mix can maximize revenues: The wholesaler travel agencies' perspective?

This study attempts to identify the variety of marketing channel efficiencies for marketing activities and sets up an optimal marketing distribution mix when using different distribution channels for wholesaler travel agencies. This research examines 12 large-scale travel agencies in Taiwan and offers seven direct and indirect distribution channels in order to establish an optimal marketing distribution mix and identifies the different forms of distribution involved. We also implement the analytic hierarchy process (AHP) to prioritize the seven main marketing distribution channels of travel agency: websites, cable TV, radios, professional magazines, retailer travel agencies, strategic alliances, and newspapers. Five criteria are categorized as a distribution channel selection: overall cost of the channel, target audience respondent rate, impression rates, transactional capabilities, and gross profit of the channel. The results show that Taiwan's wholesaler travel agencies adopt the retailer travel agency as their highest priority of channel selection, while travel agency websites hold it as their second priority. Transactional capabilities, gross profit of the channel, and overall cost of the channel are the top three favorable choices among the five criteria considered. This study proposes an innovative hierarchy model of marketing distribution mix to a wholesaler travel agency practitioner when making decisions in order to effectively exploit the different distribution mix, to maximize performances and revenues, and to overcome the traditional experience based on the shortcomings of the selection.     

“农超对接”模式下农户心理契约的构成及中介效应分析

组织公民行为是测量组织合作过程中绩效的重要指标之一,而影响其组织公民行为的众多因素中,又以组织公平最为重要。本文研究的对象是"农超对接"过程中农户所表现的组织公民行为,着眼于农户心理契约的视角,通过实证分析探讨超市组织公平与农户组织公民行为之间的关系。研究结果发现,超市组织公平是影响农户组织公民行为表现的重要因素;而农户的关系型心理契约是超市组织公平对农户组织公民行为影响的中介变量。最后,针对研究结果,提出研究结论以及在"农超对接"过程中的政策建议。     

中国城市群划分与空间分布研究

随着改革开放后中国经济的飞速发展,中国城市群体系不断完善.运用分形理论的基本思想,利用arcgis软件对中国城市群的空间分布定量分析发现,中国城市群的不均衡分布态势和空间轴线分布特征明显.     

中国生态城建设的现状特征与发展态势——中国百个生态城调查分析

我国近些年生态城建设呈现出数量多、规模大、发展速度快的特征,目前全国已出现一百多个大小不等的新建生态城项目。但这些生态城是否都是真正意义上的生态城受到学者和公众的质疑,因此迫切需要全面了解当前我国生态城建设的基本情况和特点,总结其发展态势。本研究针对我国生态城市建设实践,分析其类型、分布特征、产业特征和存在的问题,以期为制定生态城市发展政策提供依据。