Non-fragile H∞ filter design with sparse structure for linear discrete-time systems

This paper presents a study on the problem of designing non-fragile _H∞$H_{\infty }$ filters with sparse structure for linear discrete-time systems. The filters to be designed with sparse structure are assumed to be with additive gain variations, which are resulted from filter implementations. Firstly, a class of sparse structures is specified from a given fully parameterized _H∞$H_{\infty }$ filter. Then, an LMI-based procedure for designing non-fragile _H∞$H_{\infty }$ filters with the sparse structure is provided. The resulting design guarantees the augmented system asymptotically stable and the _H∞$H_{\infty }$ attenuation level less than a prescribed level. A numerical example is given to illustrate the proposed method.     

基于MOOC的翻转课堂教学模式研究

近年来,"MOOCs风暴"席卷世界高等教育。MOOC拥有优质课程资源,促进了世界范围内的知识分享,为不同学科的教和学创造了大量的机会。翻转课堂是运用现代技术实现知识传授与知识内化的颠倒教学模式,是一种师生互动、激发学习兴趣的有力手段,真正体现"以学生为中心"的教育理念,被称为大势所趋的"课堂革命"。该文将MOOC资源与翻转课堂有机结合,构建MOOC视频替代模式、"MOOC视频+自制视频"模式、二次开发模式等三种新型翻转课堂教学模式,高校结合自身的实际情况选择与应用,可提升翻转课堂教学质量,充分发挥MOOC在高等教育领域的作用。     

“后悔”的词汇化研究

现代汉语中的动词"后悔"由状中结构"后+悔"词汇化而成。"后悔"结构在先秦就已大量使用,其中"后"是时间名词,意思是"动作或事情完成之后",用来修饰谓语中心词"悔","悔"的意思是"后悔"。汉时"后+悔"结构开始词汇化,汉以后基本词汇化为复合动词,并一直沿用到现代汉语中。导致"后悔"词汇化的动因一是"悔"的语义要求,二是"后"与"悔"的一个义素义重合,三是汉语词汇复音化大趋势的影响,四是重新分析机制的作用。     

Shared understandings: environmental perspectives of Kenyan community members and teachers

Environmental issues are a shared human concern as communities in all nations and geographic regions are grappling with environmental degradation. Despite this concern, there are multiple different viewpoints on the current state of environmental issues and how to understand these problems. Understanding how different communities conceive of the environment and sustainability is paramount in efforts to increase the frequency of environmentally conscious choices. If an awareness of others’ perspectives of the environment is lacking, then the development of sustainable choices is placed at risk because of potentially competing views of what sustainability means in a particular context. As such, solutions to these environmental problems are frequently viewed as ‘wicked problems.’ This study investigates the shared and divergent environmental viewpoints of teachers and community members in Kenya. This study utilized photo-methodologies and qualitative in vivo analysis. The shared viewpoints were on positive and negative notions of environmental issues. The divergent viewpoints were on solutions that included types of innovations and amount of government involvement.     

略论日本文化的海洋性特点

日本属岛国,其文化必然存在海洋性特点,本文从物质、制度和精神等方面选取代表性事物,初步分析了日本文化中的海洋性特点,认为日本文化具有鲜明的海洋性特点。     

中国城市绿道雨洪管理研究(英文)

为提高城市绿道的雨洪调节功能,在文献研究和案例分析基础上,首先对城市绿道与低影响开发、绿色雨水基础设施的关系进行了分析.然后,提出了基于雨洪调节功能的城市绿道分类系统,总结适用于不同类型绿道的雨洪控制利用技术措施.结合中国城市规划体系,提出了与城市排水系统相结合的绿道规划方法,以及绿道雨水系统和单项雨水设施的设计方法,探讨了绿道雨水系统在入流、竖向、溢流等方面与其他系统的衔接关系.最后,介绍了上述规划设计方法在嘉兴滨水绿道和道路绿道示范项目中的应用,结果表明雨洪控制利用系统对年径流总量和年均污染物总量(TSS)的削减率分别不低于30%和40%.     

英美法系对价原则的矛盾性及其解读

对价原则作为英美契约法的效力基石,其主要功能是判断非正式允诺是否具有强制力.然而,对价原则自身在概念、功能、内容等方面均存在一定的矛盾性,体现为概念是否具有可确定的矛盾、对价的积极功能与消极功能之间的矛盾、具体规则之例外情形大量出现的矛盾.究其原因是,看待问题的视角不同、关键内核把握不同、历史发展规律和逻辑使然等.     

“形+数”格式“巨N”的历时研究

“形＋数”格式“巨N”在古代汉语中有八种表现形式,只有“巨万”沿用至现代汉语中,且成为一个固定的双音词.该格式在历时发展中呈现出选择性、顺序性、沿用时间长短不一、使用范围大小有异等特性.其语法特点是用形容词修饰数词,充当定语和谓语,主要的语义特征是强调数量巨大,具有夸张的修辞特点.该格式产生的动因,一是数词和形容词自身的特点,二是语言的新奇性特征;消失的动因,一是词类基本语法功能的限制,二是科技和认知水平的提高.     

The bond between intelligences: Cultural,emotional, and social

Increasing interest in multiple forms of nonacademic intelligences in addition to the well‐established intelligent quotient (IQ) to explain individual success has triggered a need for clear establishment of the theoretical and empirical connection among these constructs. As such, this article explores the interrelationship that exists among three forms of nonacademic intelligences: cultural, emotional, and social. Theoretical and practical implications are also discussed.     

电费计算服务平台的设计思维

文章就电费计算的关键性技术加以讨论。重点是讨论了电费计算服务平台应当具有的特征和计算平台架构的设计。提出了基于C＋＋语言的电费计算服务器的设计思想。