User-preferences based service selection model in large-scale services with various QoS properties

With the rapid growth of service scale, there are many services with the same functional properties but different non-functional properties on the Internet. There have been some global optimizing service selection algorithms for service selection. However, most of those approaches cannot fully reflect users’ preferences or are not fully suitable for large-scale services selection. In this paper, an ant colony optimization (ACO) algorithm for the model of global optimizing service selection with various quality of srevice (QoS) properties is employed, and a user-preference based large-scale service selection algorithm is proposed. This algorithm aims at optimizing user-preferred QoS properties and selecting services that meet all user-defined QoS thresholds. Experiment results prove that this algorithm is very efficient in this regard.     

依托学生社团,做好高校国防教育工作——以云南农业大学军事爱好者协会为例

国防教育是高校素质教育的重要组成部分,加强当代大学生国防教育具有十分重要的意义。除传统的高校国防教育方式外,在当前形势下,利用学生社团组织有效开展国防教育活动,通过行为主动参与式、活动方式学生化的途径,影响和带动广大学生参与、接受国防教育不失为一种行之有效的办法,本文以云南农业大学武装部军事爱好者协会为例,介绍了协会参与学校国防教育收到的成效,对高等学校如何开展国防教育提供了一个有益探索。     

高职院校德育建设应加强的几个问题

高职院校德育建设要坚定社会主义大学的办学方针,以科学论理为指导,大力挖掘我国传统文化的思想宝库;坚持德育的首要地位;加强校园文化建设;加强德育工作队伍的建设。     

公民教育与高中历史课堂教学整合的实践研究——以《近代中国民族资本主义的曲折发展》为例

公民教育是新时期历史教育的重要内容。现阶段对历史教育中公民教育的研究主要集中在必要性和可行性的理论研究层面。通过以《近代中国民族资本主义的曲折发展》一课为例,探索在高中历史课堂教学中开展公民教育的具体途径及方法。     

转换惯性参考系研究碰撞中的动能损失

文章阐述动量动能及其变化量与参考系的关系,在此基础上分析为什么完全非弹性碰撞是系统动能损失最大的碰撞,提出利用参考系化简问题的实用方法。     

任务驱动模式在PLC教学中的应用

可编程序控制器（简称PLC）是高职院校电子信息专业一门重要的课程。该课程在课堂教学中方法非常重要,传统的理论教学远不能达到预期的效果,同时课堂中缺乏具体的教学载体工具,本文作者通过在教学实践中不断地摸索,发现采用任务驱动模式教学法,能提高学生的兴趣和教学效率。     

Incorporating Social Justice in Reference Education

Students of reference service can better prepare for careers in serving today’s communities by not only being sensitive to the needs of all members of their communities but also serving as advocates for services for those who are disenfranchised. This column addresses the place of incorporating the philosophy and application of social justice into the education of information specialists who are preparing for careers as reference librarians.     

Genotype-phenotype correlations in Chinese patients with TGFBI gene-linked corneal dystrophy

In this paper, we report the clinical and molecular features of the distinct TGFBI (human transforming growth factor β-induced, OMIM No. 601692) gene-linked corneal dystrophy. Altogether, five pedigrees and ten unrelated individuals diagnosed as corneal dystrophy were recruited. Peripheral venous DNA was extracted, and then amplified by polymerase chain reaction (PCR) and scanned for mutation by single-stranded conformation polymorphism (SSCP). Direct DNA sequencing was used to analyze the mutations of the TGFBI gene. In our study, thirty patients from five pedigrees and ten sporadic patients were diagnosed as four TGFBI gene-linked corneal dystrophies of granular corneal dystrophy type I (GGCD I), Avellino corneal dystrophy (ACD), lattice corneal dystrophy type I (LCD I), and lattice corneal dystrophy type IIIA (LCD IIIA), and in total, seven disease-causing mutations, namely R555W, A546D, A546T, and T538P mutations in exon 12, R124H and R124C mutations in exon 4, and P501T mutation in exon 11, were identified, while four polymorphisms of V327V, L472L, F540F, and 1665-1666insC were screened in exons 8,11, and 12. The study ascertained the tight genotype-phenotype relationship and confirmed the clinical and genetic features of four TGFBI gene-linked corneal dystrophies.     

Implications of membrane fouling toward the removal of the pharmaceutical sulfamethoxazole by nanofiltration processes

The influence of membrane fouling on the retention of the trace organic contaminant sulfamethoxazole by a nanofiltration (NF) process was investigated. Organic fouling caused a severe flux decline possibly due to pore blocking and adsorption directly after the commencement of the fouling layer development. Such membrane-foulant interactions were absent for colloidal fouling, which resulted in a more gradual flux decline. Membrane charge played a significant role in the separation process of inorganic salts, where the retention was the highest in a caustic environment (high pH) due to more swollen membrane material caused by the higher negative charge on the membrane. Organic fouling and a combination of colloidal and organic fouling led to a significant increase in the membrane negative charge. The influence of membrane fouling on solute retention was dependent on the fouling behaviour and the physicochemical properties of the model foulants, where the model foulants probably contributed to an increase in the retention of charged solutes due to enhanced electrostatic interactions. Organic fouling caused an increase in the retention of inorganic salts and sulfamethoxazole due to pore blocking. In contrast, colloidal fouling caused a decrease in the retention of inorganic salts due to cake-enhanced concentration polarisation. However, the presence of a colloidal fouling layer did not reduce the retention of sulfamethoxazole. A mixture of colloidal and organic matter improved the retention of inorganic salts. A similar conclusion can be inferred for sulfamethoxazole at pH 4 when the compound exists in a neutral form.