明渠分层湍流的动力学亚格子模型大涡模拟研究

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ｔｕｒｂｕｌｅｎｔｈｅａｔｔｒａｎｓｆｅｒｏｃｃｕｒｓｉｎｔｈｅｐｒｅｓｅｎｃｅｏｆｔｈｅｒ ｍａｌｓｔｒａｔｉｆｉｃａｔｉｏｎｉｎｍａｎｙｉｍｐｏｒｔａｎｔｅｎｇｉｎｅｅｒｉｎｇａｎｄｇｅｏｐｈｙｓｉｃａｌｆｌｏｗｓ ,ｗｈｅｒｅ ,ａｓａｎｅｘａｍｐｌｅ ,ａｓｔａｂｌｅｓｔｒａｔ ｉｆｉｃａｔｉｏｎｏｃｃｕｒｓｎｅａｒｔｈｅｃｏａｓｔａｎｄａｎｕｎｓｔａｂｌｅｓｔｒａｔｉｆｉｃａ ｔｉｏｎｏｃｃｕｒｓｉｎａｃｏｎｖｅｃｔｉｖｅｌｙｄｒｉｖｅｎａｔｍｏｓｐｈｅｒｅ .Ｍｅａ…     

简谐激励下输流管的稳定性和混沌运动

Ｎｏｔａｔｉｏｎａｖｉｓｃｏｅｌａｓｔｉｃｃｏｅｆｆｉｃｉｅｎｔ Ａ ｃｒｏｓｓ ｓｅｃｔｉｏｎａｌａｒｅａｏｆｔｈｅｐｉｐｅｗａｌｌｄｄｉｍｅｎｓｉｏｎｌｅｓｓｆｏｒｃｉｎｇａｍｐｌｉｔｕｄｅＤｆｏｒｃｉｎｇａｍｐｌｉｔｕｄｅＥＩｆｌｅｘｕｒａｌｒｉｇｉｄｉｔｙｏｆｔｈｅｐｉｐｅｇ ａｃｃｅｌｅｒａｔｉｏｎｄｕｅｔｏｇｒａｖｉｔｙＬｌｅｎｇｔｈｏｆｐｉｐｅｍｓｐｅｃｉｆｉｃｍａｓｓｏｆｐｉｐｅＭｓｐｅｃｉｆｉｃｍａｓｓｏｆｆｌｕｉｄｎｄｉｍｅｎｓｉｏｎｌｅｓｓｆｏｒｃｉｎｇｆｒｅｑｕｅｎｃｙｔｔｉ…     

Preparation and Photoconductivity of Fe-Phthalocyanine Derivation and C_(60) Composite Films

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ｒｅｃｅｎｔｌｙｐｈｔｈａｌｏｃｙａｎｉｎｅｓ (Ｐｃｓ)ａｓｏｒｇａｎｉｃｓｅｍｉｃｏｎ ｄｕｃｔｏｒｓｈａｖｅａｔｔｒａｃｔｅｄｍｏｒｅａｔｔｅｎｔｉｏｎｂｅｃａｕｓｅｔｈｅｙａｒｅｖｅｒｙｓｔａｂｌｅ .Ｐｃｓ ｐｏｓｓｅｓｓｂｅｔｔｅｒ ｐｈｏｔｏｅｌｅｃｔｒｉｃａｌｐｒｏｐｅｒｔｉｅｓａｎｄｈｉｇｈｌｙａｂｓｏｒｐｔｉｏｎｉｎｔｈｅｖｉｓｉｂｌｅｌｉｇｈｔｒｅ ｇｉｏｎ .ＳｏｍｅｐｒｏｐｅｒｔｉｅｓｏｆＰｃｓｃａｎｂｅｉｍｐｒｏｖｅｄａｌｏｔｂｙｂｏｎｄｉｎｇｔｏｐ…     

第二代小波应用于图象的无损压缩编码

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ｔｈｅｉｍａｇｅｌｏｓｓｌｅｓｓｃｏｍｐｒｅｓｓｉｏｎｃｏｄｉｎｇｉｓａｎｉｍｐｏｒｔａｎｔｐａｒｔｏｆｔｈｅｄｉｇｉｔａｌｉｍａｇｅｃｏｍｐｒｅｓｓｉｏｎｒｅｓｅａｒｃｈ .Ｍｅｄｉｃａｌｉｍａｇｅｓ,ｓａｔｅｌｌｉｔｅｉｍａｇｅｓａｎｄｓｅｉｓｍｉｃｄａｔａｄｅｍａｎｄｌｏｓｓ ｌｅｓｓｃｏｄｉｎｇ .Ｔｈｅｂａｓｉｃｉｄｅａｏｆｃｏｍｐｒｅｓｓｉｏｎｉｓｔｏｅｘｐｌｏｉｔｔｈｅｃｏｒｒｅｌａｔｉｏｎｓｔｒｕｃｔｕｒｅｐｒｅｓｅｎｔｅｄｉｎｍｏｓｔｒｅａｌｌｉｆｅｉｍ …     

用输入-输出线性化控制混沌振动

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ｉｎｒｅｃｅｎｔｙｅａｒｓ ,ｃｏｎｔｒｏｌｌｉｎｇｃｈａｏｓｈａｓｄｒａｗｎｇｒｅａｔａｔｔｅｎｔｉｏｎｂｅｃａｕｓｅｏｆｉｔｓｔｈｅｏｒｅｔｉｃａｌｉｍｐｏｒｔａｎｃｅａｎｄｐｏｓｓｉ ｂｌｅａｐｐｌｉｃａｔｉｏｎｓ[1,2 ] .Ｔｈｅａｐｐｌｉｃａｔｉｏｎｓｏｆｎｏｎｌｉｎｅａｒｓｙｓ ｔｅｍｔｈｅｏｒｙｔｏｃｏｎｔｒｏｌｃｈａｏｓｉｓｏｎｅｏｆｔｈｅｍａｉｎａｓｐｅｃｔｓｏｆｒｅｓｅａｒｃｈｏｎｃｏｎｔｒｏｌｌｉｎｇｃｈａｏｓ[2 ] .Ｔｈｅｅｘａｃｔｌｉｎｅａｒｉｚａｔ…     

PREPARATION AND CHARACTERISTICS OF NEW TYPE NANOCOMPOSITE POWDER

ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅａｕｔｈｏｒ’ｓｐａｓｔｒｅｓｅａｒｃｈｅｓｓｈｏｗｅｄｔｈａｔｅｌｅｃｔｒｏｌｅｓｓ ｐｌａｔｅｄｍｅｔａｌ ｃｅｒａｍｉｃｃｏｍｐｏｓｉｔｅｐｏｗ ｄｅｒｃｏｕｌｄｒｅｔａｒｄｃｅｒａｍｉｃｇａｉｎｇｒｏｗｔｈｄｕｒｉｎｇｔｈｅｓｉｎｔｅｒｐｒｏｃｅｓｓ,ｅｖｅｎｌｙｄｉｓｐｅｒｓｅｔｈｅｍｅｔａｌｌｉｃｐｈａｓｅｏｎｔｈｅｃｅｒａｍｉｃｍａｔｒｉｘａｎｄ ,ｔｈｅｒｅｆｏｒｅ ,ｉｎ ｃｒｅａｓｅｔｈｅｆｒａｃｔｕｒｅｓｔｒｅｎｇｔｈ ,ｔｏｕｇｈｎｅｓｓａｎｄｗｅａｒ…     

CAN ABILITY AND WORKING CONDITIONS EXPLAIN THE WAGE DIFFERENTIAL ACROSS INDUSTRIES AND FIRMS?

ＩＮＴＲＯＤＵＣＴＩＯＮＷｅｈａｖｅｎｏｔｉｃｅｄｔｈｅｗａｇｅｄｉｆｆｅｒｅｎｔｉａｌｓａｃｒｏｓｓｉｎｄｕｓｔｒｉｅｓａｎｄｆｉｒｍｓｉｎｔｈｅｗｏｒｌｄ ,ａｎｄａｌｗａｙｓｅｘ ｐｌａｉｎｔｈｉｓｂｙｔｈｅｈｕｍａｎｃａｐｉｔａｌｔｈｅｏｒｙａｎｄｔｈｅｃｏｍｐｅｎｓａｔｉｎｇｗａｇｅｄｉｆｆｅｒｅｎｔｉａｌｓｂｅｃａｕｓｅｉｎｔｈｅｐｅｒｆｅｃｔｃｏｍｐｅｔｉｔｉｖｅｌａｂｏｕｒｍａｒｋｅｔｗｈｅｒｅｗｏｒｋｅｒｓａｃｃｅｐｔｊｏｂｓｃａｎｅｘｐｅｃｔｔｏｒｅｃｅｉｖｅｃｏｍｐｅｎｓａｔ…     

Buckling and multiple equilibrium states of viscoelastic rectangular plates

１　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆｓｃｉｅｎｃｅａｎｄｔｅｃｈｎｏｌｏｇｙｐｒｏｍｏｔｅｓｔｈｅａｐｐｌｉｃａｔｉｏｎｓｏｆｖｉｓｃｏｅｌａｓｔｉｃｓｔｒｕｃｔｕｒｅｓ．Ｓｉｎｃｅａｎｉｎｔｅｇｒａｌｔｙｐｅｃｏｎｓｔｉｔｕｔｉｖｅｒｅｌａｔｉｏｎｃａｎｂｅｕｓｅｄｔｏｓｉｍｕｌａｔｅｔｈｅｍｅｃｈａｎｉｃｓｂｅｈａｖｉｏｒｏｆａｖｉｓｃｏｅｌａｓｔｉｃｍａｔｅｒｉａｌｂｅｔｔｅｒ,ｉｔｉｓｗｉｄｅｌｙａｐｐｌｉｅｄ．Ｈｏｗｅｖｅｒ,ｉｆｗｅａｐｐｌｙａｎｉｎｔｅ…     

骨髓细胞的模糊识别

１　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ｉｔｉｓａｎｅａｓｙｔａｓｋｆｏｒｅｘｐｅｒｉｅｎｃｅｄｃｙｔｏｐａｔｈｏｌｏｇｉｓｔｓｔｏｉｄｅｎｔｉｆｙｃｅｌｌｓｕｎｄｅｒｏｐｔｉｃａｌｍｉｃｒｏｓｃｏｐｅｓ,ｂｕｔｉｔｉｓｖｅｒｙｃｏｍｐｌｉｃａｔｅｄｆｏｒｃｏｍｐｕｔｅｒｔｏｃａｒｒｙｏｎｔｈｅｓａｍｅｍｉｓｓｉｏｎａｕｔｏｍａｔｉｃａｌｌｙ．Ｏｎｅｏｆｔｈｅｍａｊｏｒｒｅａｓｏｎｓｉｓｔｈｅｖａｒｉｏｕｓｐａｒａｍｅｔｅｒｓａｎｄｆｅａｔｕｒｅｓｏｆｃｅｌｌｓｔｈａｔｏｆｔｅｎｏｖｅｒｌａｐｗｉｔｈｅ…     

半椭圆表面裂纹应力强度因子公式的评估

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ｔｈｅｓｔｒｅｓｓｉｎｔｅｎｓｉｔｙｆａｃｔｏｒ(ＳＩＦ)ｏｆｔｈｅｓｅｍｉｅｌｌｉｐｔｉｃａｌｓｕｒｆａｃｅｃｒａｃｋｎｅｅｄｓｔｏｂｅｃａｌｃｕｌａｔｅｄｆｏｒｅｖａｌｕａｔｉｎｇｔｈｅｓｔｒｅｎｇｔｈｏｆｍｅｔａｌｃｏｍｐｏｎｅｎｔｓｂｅｃａｕｓｅｍａｎｙｆｌａｗｓｏｃｃｕｒｏｎｔｈｅｃｏｍｐｏｎｅｎｔｓｕｒｆａｃｅｄｕｅｔｏｔｈｅｎａｎｕｆａｃｔｕｒｅａｎｄｔｒａｎｓｐｏｒｔｐｒｏｃｅｄｕｒｅ.Ｕｐｔｏｎｏｗ,ｓｏｌｖｉｎｇｔｈｒｅｅｄｉｍｅｎｓｉｏｎａｌｃｒａ…     

Children's learning about the balance scale

We present a detailed look at children's learning about the balance scale. In our study, as children explored the balance scale, they acquired and built on special-case and context-specific knowledge. Before making general and context-independent observations, they made more local observations.We contrast our findings with two previous analyses of children's knowledge [Inhelder and Piaget, 1958; Siegler, 1978] about the balance scale in light of assumptions about the nature of knowledge and its acquisition. Educational implications of all three analyses are considered.     

Authentic Encountering of Others and Learning through Media-Based Public Discussion: A Phenomenological Analysis

In challenging the media-pessimistic phenomenological analyses provided by Hubert Dreyfus and Tanja Staehler, I argue that such analyses have misinterpreted phenomenological theory and have resulted in fallacious arguments. I show that phenomenological theory, as it relates to what constitutes our social experiences, indicates that the core of encountering others is the same in both physical presence and through the media. It is the other's expressions and not the presence of their physical bodies that is central. Based on the phenomenological analyses of Husserl and Stein, I conclude that there is no reason why even advanced learning should not be possible via media-based public discussion.     

钱学森对系统论的创新——系统科学通向马克思主义哲学的桥梁

通过1978年钱学森发表的《组织管理技术——系统工程》一文的历史考察。对钱学森关于系统论的科学定位及其核心内容进行了比较系统的介绍。     

李雅普诺夫直接法的几何思想与应用

李雅普诺夫直接法是整个稳定性理论的核心方法,其几何思想是借助于一个V函数,利用方程右端的信息来探测解的稳定性的原始几何思想。主要阐述了稳定性定理、渐近稳定性定理及不稳定性定理的应用。     

对新学科"大学学习学"的认识

经历了1953～1978年间我国零散的经验性的学生学习方法指导之后,在"解放思想,实事求是"(1978年)的启发下,笔者首先解放自己,摆脱某些传统教育思想与方法的羁绊,1980年开始了新教育思想观念的探索,先进行了新的"分科学习指导".1984年发展并建构了指导学生德智体美融合发展,懂得成才学习的战略战术,学会自主学习、科学学习与创造性学习的"整体学习指导".在实践与研究中,发现并提出了学习公理(10条)、自主学习观等学生学习观系统、学生学习活动结构系统及学习学的主要术语,1998年在此基础上基本建构起具有严密逻辑系统的新学科"学生学习学".     

Science capital or STEM capital? Exploring relationships between science capital and technology,engineering, and maths aspirations and attitudes among young people aged 17/18

We previously proposed that science capital (science-related forms of cultural and social capital) can be used as a theoretical lens for explaining the patterned nature of aspirations and educational participation among young people aged 11–16. Building on these findings, the present article investigates whether science capital is related to post-18 aspirations to pursue further STEM study and whether science capital can be extended to related disciplines including engineering, maths and technology. Specifically, we report on correlational analyses exploring the relationships between science, technology, engineering and maths attitudes and science capital. Drawing on data from a new survey of 7,013 17/18 year old English secondary school students, analyses showed that science capital, while strongly related to engineering and physical science future study aspirations, was not strongly related to the pursuit of either maths or technology postsecondary study. The findings also suggest that engineering and maths attitudes have a stronger relationship to science capital than attitudes relating to technology. We conclude with a discussion of the implications of these findings and propose that science capital might be more usefully applied to “SEM,” with links to technology fields and aspirations needing further exploration.     

A Piagetian-Based Programme for Learning “Elements and Symbols”

Piaget's learning theory on cognitive development has had considerable impact on science education (Piaget, 1964; Inhelder and Piaget, 1958; Craig, 1972). The theory classifies cognitive learning into four successive stages: (a) sensory-motor, (b) pre-operational, (c) operational, and (d) formal. Various programmes and instructional strategies have been developed based on the theory (Batt, 1980; Karplus, 1977; Renner and Stafford, 1979; Ryan, et al., 1980; Herron, 1978; Good et al; 1978). An application of this theory for teaching and learning scientific concepts is the Piagetian learning cycle (Karplus, 1977) which is of growing interest among science educators. This article intends to introduce briefly the learning cycle in general and suggest a learning cycle for teaching a topic in chemistry: “Elements and Symbols”.     

试析价值观念变革的内在机制

价值观念是文化的内核,也是价值学理论的核心.本文论述了价值观念的体系结构,分析了价值观念变革的内在机制,提出我们在建构新的价值观念时,要从价值观念变革的内在机制入手,既要有一定的高尚性,又要有一定的可行性.     

现代化和社会主义本质论的形成

社会主义和现代化的统一，是中国历史的选择和邓小平理论的核心。作为邓小平理论首要和基本问题的社会主义本质论自然与现代化有密不可分的联系。本文主要以马克思主义现代化理论为指导，从社会主义现代化的历史定位、利弊得失、世界现代化的现状和特点等多个角度来研究邓小平科学社会主义本质论的提出背景，以深化认识和理解。     

基于四元教学模式构建高职新型体育课——以邢台职业技术学院为例

当前高职教学改革中,走在前列的是各院校的核心专业课程改革建设,对于体育类的公共课则少有涉及。高职院校一直以来沿用本科体育教学模式,目前显然已经不能适应高职院校的人才培养方案,所以基于四元教学模式构建掌握综合认知能力的高职新型体育课是一种全新的大胆尝试。