On the construction of trend free row-column 2-level factorial experiments

In this paper we consider experimental situations where a complete or fractional factorial experiment having all factors at 2 levels is to be conducted using a 2 ^m × 2 ⁿ row-column design and where there may be an unknown trend effect that can be expressed as a polynomial function of the position in which observations are obtained in the row-column design. Methods are given for allocating the treatments from a complete or fractional 2-level factorial experiment to rows and columns so that the resulting design yields estimates for main effects that have a high level of resistance against trend effects. Research supported by NSF Grant No. DMS-8700945.     

反锐化掩模图像增强方法

降质或退化的图像通常存在不同程度的边缘模糊、局部或整体对比度差等不足,直接采用边缘提取算子对此类图像进行边缘提取有时导致边缘过提升,即噪声"突兀",其结果会影响整幅图像的协调性。边缘提取前,采用USM(Un-sharp masking)反锐化掩模增强图像,只要参数设置合理,USM增强可以对图像起到很好的增强效果,有利于图像的边缘提取。     

政策性金融改革发展的国际经验及借鉴

政策性银行是金融体系的重要组成部分,但是政策性银行不是“第二财政”,国际经验为我国政策性银行良性运行提供了很好的借鉴。根据我国国情,本文从法制构建、政策导向、市场运作以及完善管理结构等方面,对我国政策性金融的改革提出了发展思路。     

城乡居民收入差别的合理程度判断

1985年以来,我国的城乡居民收入差别呈扩大趋势.产生这一扩大趋势的原因既有我国经济发展阶段所决定的合理扩大,也有政府的城市偏向政策等因素造成的不合理扩大.本文通过建立一个反映二元对比系数与经济发展水平关系的计量模型,来测度我国的城乡居民收入差别的合理程度.     

Why do we teach what we teach? Perspectives from Asia’s hospitality and tourism program directors

This study investigates the forces shaping curriculum design of hospitality and tourism undergraduate programs in Southeast and East Asia. The topic has received little attention in the past. In-depth semi-structured interviews were conducted with 11 hospitality and tourism program directors from 8 regions in Southeast Asia (Indonesia, Malaysia, Thailand, the Philippines) and East Asia (China, Hong Kong, Macao, South Korea). The results indicated that the industry as one major stakeholder has strong influences on curriculum in multiple ways. This can be seen in the way industry commentary shapes the objectives of the programs, graduate competencies, and the subject material favoring employability for the hospitality and tourism industry. Accreditation was viewed as more essential in designing a curriculum for the higher institutions in the Southeast Asia compared to East Asia. The availability and expertise of staff were viewed as the least important forces in shaping the curriculum.     

新旧土地利用分类体系对比分析

通过对新旧土地利用分类的产生背景、分类原则及其依据、体系、含义等方面进行对比,表明两种不同的分类体系是在不同的社会经济背景下产生的,有各自的优点和缺点。同时,针对新分类中存在的问题,提出了相应的建议,以求不断地完善和充实。     

农业废弃物资源化路径及综合效益分析——基于鄂、豫两省调研数据

运用模糊综合评价方法对农业废弃物资源化不同路径的经济、社会和生态效益进行评价、对比分析,以此探求农业废弃物资源化不同路径的比较优势,优化农业废弃物资源化利用结构.评价结果显示:农业废弃物资源化不同路径的生态效益优劣排序为:饲料化＞能源化＞基质化＞肥料化＞材料化;经济效益的优劣排序为:肥料化＞基质化＞能源化＞饲料化＞材料化;社会效益的优劣顺序为:基质化＞材料化＞能源化＞肥料化＞饲料化.在农业废弃物资源化不同路径的生态、经济和社会效益评价的基础上,得出农业废弃物资源化不同路径的综合效益优劣顺序为:基质化＞能源化＞肥料化＞饲料化＞材料化.据此,提出了优化湖北省农业废弃物资源化利用结构的建议.