合度端庄 通达流畅——启功先生《论书札记》学习心得

文章以《论书札记》为中心,阐释书法大师启功先生关于书体与法度、用笔与结字、碑帖与墨迹等辩证关系的精辟论述,及其对发展中国书法理论与实践的巨大贡献,并提出"合度端庄,通达流畅"是"启体"最为鲜明的特色。     

PSS码词组输入法及教学实践

本文介绍了PSS码（拼音、声调、首笔码）汉字输入法的词组编码及输入方法,并总结了PSS码作为一门选修课的教学效果。     

A multicriteria sorting approach based on data envelopment analysis for R&D project selection problem

In this paper, multiple criteria sorting methods based on data envelopment analysis (DEA) are developed to evaluate research and development (R&D) projects. The weight intervals of the criteria are obtained from Interval Analytic Hierarchy Process and employed as the assurance region constraints of models. Based on data envelopment analysis, two threshold estimation models, and five assignment models are developed for sorting. In addition to sorting, these models also provide ranking of the projects. The developed approach and the well-known sorting method UTADIS are applied to a real case study to analyze the R&D projects proposed to a grant program executed by a government funding agency in 2009. A five level R&D project selection criteria hierarchy and an assisting point allocation guide are defined to measure and quantify the performance of the projects. In the case study, the developed methods are observed to be more stable than UTADIS.     

教育理论的分类框架与发展反思

教育理论的繁荣没有带来与之对称的教育实践改进是不争的事实,这使教育理论蕴藏信誉危机.这些事实促使我们必须对教育理论做出深刻反思.但反思必须是辩证的、精细的、建设性的.对教育理论进行合理分类,并在此基础上对各类教育理论进行反思,对教育理论发展是至关重要的.依傍科学标准与价值标准建立起来的教育理论,可以依据其成立的标准划分成四类教育理论:实然的教育理论、价值的教育理论、逻辑的教育理论和科学的教育理论.在相对精细的划分框架下对各类理论的正确评价可以促进各类教育理论的理性发展.     

Improved Approximation for Breakpoint Graph Decomposition and Sorting by Reversals

Sorting by Reversals (SBR) is one of the most widely studied models of genome rearrangements in computational molecular biology. At present, is the best known approximation ratio achievable in polynomial time for SBR. A very closely related problem, called Breakpoint Graph Decomposition (BGD), calls for a largest collection of edge disjoint cycles in a suitably-defined graph. It has been shown that for almost all instances SBR is equivalent to BGD, in the sense that any solution of the latter corresponds to a solution of the former having the same value. In this paper, we show how to improve the approximation ratio achievable in polynomial time for BGD, from the previously known to for any > 0. Combined with the results in (Caprara, Journal of Combinatorial Optimization, vol. 3, pp. 149–182, 1999b), this yields the same approximation guarantee for n! – O((n – 5)!) out of the n! instances of SBR on permutations with n elements. Our result uses the best known approximation algorithms for Stable Set on graphs with maximum degree 4 as well as for Set Packing where the maximum size of a set is 6. Any improvement in the ratio achieved by these approximation algorithms will yield an automatic improvement of our result.     

谈水书的古文字笔画元素

文章通过对水族文字中的多点现象、三角符号、弧形笔画与圆形符号等古文字的笔画元素,与古汉字类似的笔画进行比较研究,阐明水族文字是古代文字的遗存,既与古代汉字观念有某些联系,又有其独特的造字视角。     

紧固件自动涂胶设备关键结构设计

针对紧固件手工方式涂胶存在的加工效率低、涂胶不均匀、胶液浪费等问题,本文对紧固件自动涂胶设备进行了 开发设计。采用螺旋槽式输料结构,实现了零件的自动排序和上料;设计了由间隙可调式导轨、气动系统和分离圆盘组 成的驱动机构;利用配合运动的方式,设计了紧固件的涂胶机构,包括涂胶片、摆动臂、旋转电机、顶推套筒及驱动气缸, 实现了对排序零件的自动连续涂胶。结果表明该设备自动化程度较高,零件加工范围广,涂胶均匀,同时避免了手工涂 胶对人体产生的伤害。     

中国城市生活垃圾分类回收问题研究——对日本城市垃圾分类经验的借鉴

中国城市的生活垃圾总量呈逐年增长的态势,而目前城市垃圾处理采用的主要方式仍是露天堆放和卫生填埋,这必然要带来垃圾污染、资源浪费和垃圾处理场地紧张等问题.垃圾分类回收是解决上述问题的最好出路.中国的垃圾分类回收难以实施的症结主要表现在观念滞后、理论研究缺乏和政府的工作力度不够.日本具有很好的城市垃圾分类回收的经验,即国家政府重视、地方政府统计数据完备、有切实可行的削减目标以及对居民进行系统而细致的教育等,很值得借鉴.     

The rise of market-based “choice” programs: 100 years of social sorting in social welfare services

Social service programs in the United States increasingly focus on giving individuals and families more “choices.” The approach is exemplified by “choice programs,” where people receive services through various forms of market participation. Examples of choice programs include defined contribution retirement plans, housing vouchers, charter schools, and health insurance marketplaces. Individuals across the socioeconomic spectrum have become accustomed to choice programs, and one's social status greatly affects the types, qualities, and prices of services people receive. The importance of the conversation around choice programs for providing access to resources is immense. Yet, despite contentious debate about their utility, we lack a comprehensive understanding of the institutionalization and widespread adoption of choice programs across a diverse range of social service domains. This article synthesizes stratification literature on retirement, healthcare, education, and housing to document the historical rise of choice programs. Particular attention is given to explaining how behavioral patterns and routines become second nature, altering who benefits, who is left out, and the overall effectiveness of the social welfare system.