提高柱塞泵容积效率的新途径

阀配流柱塞泵的吸、排油阀,由于运动滞后,造成泵的容积效率下降,这是该类泵的一个主要技术缺陷。本文设计了一种新型配流阀,解决了运动滞后问题,容积效率得到大幅度提高。同时文中对新型配流阀的设计计算,进行了探讨。     

国外品牌犯错研究述评与展望

以往的品牌犯错事件主要以产品伤害危机为主,近年来在社会规范和道德层面上也逐渐地有所体现,给企业和利益相关者带来了更广泛的影响,而现有品牌犯错的述评仍主要停留在品牌功能层面上（以产品伤害危机为主）,缺少系统全面的分析。本文在梳理国外文献基础上,围绕品牌犯错的含义、分类、相关变量及影响结果、应对策略等主题进行述评,探讨该领域的未来研究方向,以期为我国的品牌犯错理论研究和实践操作提供参考借鉴。     

新形势下厦门中小货代企业转型思路研究

分析了厦门市中小货代企业现状,总结和归纳了目前面临的主要问题,探讨了在产业转移和产业升级的新形势下,厦门市中小货代企业转型的基本思路,并提出了具体途径：走合作之路,成立货代联盟组织;继续向第三方物流转型;向综合货运代理业转型及走个性化的经营道路。     

TD终端问题导致网络单通/双不通的问题分析

通过使用Node B语音环回、终端性能测量、基带信号DSP数据检测、信令抓取分析等多种新技术手段,找出了TD网络单通/双不通问题发生的原因,并提出了合理的解决办法。     

Assessing a farm's sustainability: insights from resilience thinking

Research on sustainability in agriculture often focuses on reducing the environmental impacts of production systems. However, environmentally friendly production methods may not be sufficient to ensure the long-term economic and social sustainability of a farm. Taking a systems approach to sustainable farming, we turn to resilience thinking with its focus on the interdependence of social and ecological systems. We apply this approach to farming by conceptualizing a farm as being part of a set of systems spanning several spatial scales and including agro-ecological, economic and political-social domains. These subsystems interact and are subjected to their own complex dynamics. Within such a complex adaptive system, farm sustainability can only be achieved through adaptability and change. To be ready for the inevitable periods of turbulent change, a farmer needs to retain diversity and redundancy to ensure adaptability. Resilience is thus more likely to emerge when farmers hone the capacity to transform the farm, when farm production is attuned to the local ecological carrying capacity, and when learning and innovation are targeted outcomes. This article shows how resilience theory applied to farming may provide a more comprehensive route to achieving sustainability and offers rules of thumb as guides to building farm resilience.     

积极开拓东盟市场促进四川“外向型”经济发展

中国与东盟正式签署协议 ,承诺到 2 0 1 0年建成中国—东盟自由贸易区。四川作为西部地区的重要省份 ,一方面与东盟国家有着密切的经济和文化联系 ;另一方面有着独特的交通优势。因此中国—东盟自由贸易区的启动对四川省外经贸发展具有极其重要的意义。四川必须抓住这一有利时机 ,集中优势 ,积极开拓东盟国家市场 ,加快四川省企业“走出去” ,促进其“外向型”经济的发展。     

Front-Country Campers' Constraints,Negotiation, and Pro-Environment Behavioral Intention: An Extension to the Theory of Planned Behavior

The theory of planned behavior (TPB) has been successfully tested in leisure and outdoor recreation studies over the last few decades. However, the inclusion of new predictors to improve the theory's predictive power has been encouraged. Utilizing leisure constraints approach, we extended the TPB by adding constraints to the theory. The literature also suggested that individuals employ cognitive and behavioural negotiation strategies to overcome their constraints. Therefore, the influence of negotiation through the constraints was also explored in this study. A sample of 1,009 front-country campers was analyzed to test the proposed extension to the TPB. Results of structural equation modeling confirmed a strong, negative indirect association between constraints and intention. Negotiation was positively and indirectly associated with intention. The proposed extension to the TPB was capable of capturing 84% of variation in intention. Theoretical and practical implications of these findings are discussed.     

京津冀区域梯度差的城市引力分析

一般来说,协调发展是区域经济发展的最高目标,而减小区域梯度差,使区域内各经济实体协调发展,也是京津冀城市群未来发展的目标。在我国的三大城市群中,京津冀城市群一直没有形成特色鲜明的二级经济中心城市,使得京津冀区域发展不平衡性明显,形成了明显的区域梯度差。本文基于城市引力模型,计算河北省各市与京津地区的城市引力值的大小,按城市引力值的大小,对河北省各个城市进行排序,形成不同的城市层级。吸引力最大形成第一层级,吸引力次大形成第二层级,吸引力较小的形成第三层级。然后针对不同引力、不同层级的城市给出产业政策或经济政策方面的建议,最终促进京津冀区域的协调发展。     

基于投入-产出理论的宁波物流业产业特性分析

本文运用投入产出分析方法,研究了物流业在国民经济中的作用,通过对2002年宁波投入产出表的计算分析,定量研究了物流业的产业特性,物流业对国民经济各部门的影响力系数、感应度系数、物流业的前向与后向波及效应。本文研究的结论表明:宁波物流业的影响力高于感应力,适宜采取主动发展模式;大部分的物流服务产品被国民经济各部门用作中间产品投入生产消费,物流业与其他产业的前向相关性比较强,对其他产业发展产生很大的推动作用等一系列相应结论。