Product Choice and Market Competition: The Case of Multiproduct Electronic Plants in Taiwan*

We examine the strategies of multiproduct plants in the Taiwanese electronics sector by introducing two new measures of product dissimilarity to capture the technological gaps of product pairs within the plant. The plant‐level index is used to analyze product mix decisions of plants. We find that plants whose products have large technological gaps are more likely to give up product lines. The product‐level index is used to show that, with increased competition, multiproduct plants exit markets where production technologies are farthest away from their core products and they also perform better than plants that continue to produce a wider range of products.     

浅谈生活垃圾填埋场的雷电防护措施

本文从生活垃圾填埋场的地理位置和运行特点,分析其容易发生雷击事故的原因和安装防雷装置的重要性,并就如何建立一套安全有效、经济合理的防雷装置提出自己的一些看法。     

An ambient tax approach to invasive species

Invasive species have become an issue of increasing concern in recent years. Invasive species are species that are not native to an area but are imported either intentionally or unintentionally and become established. A primary pathway for introduction is the ballast water of ships. Although not all imported species become invasive, those that do cause extensive damage to ecosystems and have been blamed for the endangerment of numerous native species. In many cases, release of non-native species can be prevented, either through open-ocean ballast water exchange, retention of ballast water, or other biosecurity measures. However, policies designed to encourage such actions face several specific challenges. The difficulty of linking an invasion to a specific vessel and of monitoring individual vessels' care makes using standard environmental liability plans difficult if not impossible. In this paper, we present an alternative policy option, that of an ambient tax. Building on the work of Segerson [Segerson, Kathleen, 1988. Uncertainty and incentives for nonpoint pollution control. Journal of Environmental Economics and Management, 15: 87-98.], we show that an ambient tax can ensure socially optimal behavior in both the short-run and the long-run with minimal vessel specific information.     

Effects of Chinese Imports on Relative Wages: Microevidence from Chile*

The increasing prominence of China in world trade raises important questions about the impact of this on importer countries. In this paper, we address the issue of how import competition from China has affected relative wages in the Chilean manufacturing industry. Using plant‐level data for the period 1996–2005, we find that increasing imports from China have depressed relative wages in sectors with higher Chinese‐import penetration. Our results show a significant reduction of relative wages, between 4 and 25 percent, for those sectors that have experienced the largest increases in Chinese imports. We also find that this effect is particularly strong for small firms, while large firms are unaffected.     

试论现代园林植物空间的营造手法

本文结合笔者多年工作的实际经验,从生态和艺术角度对现代园林植物空间的营造手法进行了详细的叙述,谨供大家作参考之用。     

外来入侵生物防控策略研究进展

归纳了外来入侵生物的种类及危害,介绍了国内外对外来入侵生物的防控策略,并对我国的外来入侵生物防控策略进行了展望。     

伊曲康唑注射液治疗ICU侵袭性真菌感染的疗效与安全性

目的观察探讨伊曲康唑注射液治疗ICU侵袭性真菌感染（IFI）的疗效与安全性,总结其临床应用价值。方法选取我院2010年6月至2012年6月ICU中发生IFI的患者46例,按照数字表随机抽取法将其分成两组,各为23例,观察组使用伊曲康唑注射液治疗,对照组使用氟康唑治疗,观察两组临床疗效和治疗期间药物不良反应。结果观察组治疗28d后疗效总有效率为100.0%（23/23）,真菌清除率为91.3%（21/23）,治疗期间不良反应率为8.7%（2/23）;对照组治疗28d后疗效总有效率为73.9%（17/23）,真菌清除率为65.2%（15/23）,治疗期间不良反应率为26.1%（6/23）,两组疗效、真菌清除率及药物不良反应率比较差异显著（P〈0.05）,具有统计学意义。结论伊曲康唑注射液治疗ICU侵袭性真菌感染（IFI）的疗效确切,显著优于使用氟康唑治疗,可加快真菌清除,尽快缓解临床症状,药物不良反应少,安全可靠,值得临床合理推广。     

火电厂冷却塔存在的问题及优化设计

冷却塔是火电厂从事电力生产的重要设施,它是利用水与空气流动接触后进行冷热交换产生蒸汽,蒸汽挥发带走热量达到蒸发散热、对流传热和辐射传热等目的,从而散去工业上或制冷空调中产生的余热,降低水温的蒸发散热装置,以保证系统的正常运行。冷却塔主要由填料、配水系统、通风设备、空气分配装置、挡水器、集水槽等部分构成。文章分析了当前冷却塔存在的不足与需要解决的问题,并从节能器、监控器和控制器3个方面探讨了如何进行冷却塔风机的节能及安全控制问题,以期对后续研究有所帮助。     

园林植物配置原则研究

随着我国市场经济发展的不断深入,社会综合实力不断增强,园林绿化越来越显示出其在城市建设中的重要性。在园林绿化中,可供选择的植物种类极其繁多,而且其形态、大小、色彩、风格等各不相同。如何利用它们进行合理地配置,使绿地充分发挥其功能作用是十分必要的。本文对植物配置的五大原则分别进行阐述:生态原则、功能原则、经济原则、艺术原则、文化原则,这些原则不仅丰富并完善了现有的植物配置理论框架系统,而且对绿地景观建设具有重要的实际指导意义。