《易经》卦象的推演与排列原理的扩展

在《易经》中论述的关于太极生两仪,两仪生四象,四象生八卦的推演原理,已普遍为人们所接受.本文援引数学的排列原理对卦象演变过程进行重新推导,发现八卦不是由四象所生,而是由两仪所生,同时又反过来印证了排列原理有所缺漏,应加以扩展.     

Propensity Score Analysis of Complex Survey Data with Structural Equation Modeling: A Tutorial with Mplus

Propensity score (PS) analysis aims to reduce bias in treatment effect estimates obtained from observational studies, which may occur due to non-random differences between treated and untreated groups with respect to covariates related to the outcome. We demonstrate how to use structural equation modeling (SEM) for PS analysis to remove selection bias due to latent covariates and estimate treatment effects on latent outcomes. Following the discussion of the design and analysis stages of PS analysis with SEM, an example is presented which uses the Mplus software to analyze data from the 1999 School and Staffing Survey (SASS) and 2000 Teacher Follow-up Survey (TFS) to estimate the effects teacher’s participation in a network of teachers on the teacher’s perception of workload manageability.     

Some Cognitive Difficulties Related to the Representations of two Major Concepts of Set Theory

The main focus of this paper is on the study of students' conceptual understanding of two major concepts of Set Theory – the concepts of inclusion and belonging. To do so, we analyze two experimental classroom episodes. Our analysis rests on the theoretical idea that, from an ontogenetic viewpoint, the cognitive activity of representation of mathematical objects draws its meaning from different semiotic systems framed by their own cultural context. Our results suggest that the successful accomplishment of knowledge attainment seems to be linked to the students' ability to suitably distinguish and coordinate the meanings and symbols of the various semiotic systems (e.g. verbal, diagrammatic and symbolic) that encompass their mathematical experience.     

商周数字卦之用六象筮法考——对张政火良先生易卦源于筮数论的初步证伪

提出了商周数字卦之用六象筮法的假说 ,解释了数字卦用数变化的筮法性原因 ,否定了流行于学界的易卦源于筮数论 ,展示了商周易学的新图景     

Science Teachers’ Perceived Benefits of an Out‐of‐school Enrichment Programme: Identity needs and university affordances

Science enrichment programmes housed outside traditional school settings offer unique opportunities to access and use authentic scientific tools and practices, especially for urban students whose school science experiences often lack resources. Yet opportunities to access these tools and practices are realized only when science teachers value them sufficiently to take advantage of them. This study examines how eight urban secondary science teachers evaluated a specific out‐of‐school science enrichment programme—a one‐year partnership with a local university science outreach centre, which culminated in a half‐day laboratory experience for their students. Teachers’ perceptions were captured through interviews and surveys. Findings indicate that these teachers came to identify and value many of the potential benefits for out‐of‐school enrichment programmes reported in the literature as well as some additional ones. The teachers’ also showed a shift over time with respect to their perceptions of the value of the out‐of‐school experience, moving from an initial focus on increasing test scores toward a greater appreciation for its impact on students’ motivation and identity development. The study offers insight into secondary science students’ and teachers’ identity needs, and what universities can offer to address them.     

机床电气原理图的识读思路

机床电器控制系统图包括电气原理图,电气安装接线图与电器元件布置图,本文作者结合教学经验介绍了机床电气原理图的读图方法与分析思路。     

伏羲文化对中国古代数学的影响

河图洛书、伏羲八卦、伏羲制规矩都是伏羲文化的重要内容。河图洛书对促进中国数字发展、整数论、组合数学具有重要的作用,伏羲八卦同中国数学研究方法、八进制数、数学思维和数学进展之间有着密切联系,伏羲制规矩是中国几何学的开端。     

Facilitating Systemic Thinking in Business Classes

This article identifies and describes three dimensions of systemic thinking—thinking holistically, thinking dynamically, and thinking in terms of feedback loops. We contend that within the field of business a significant amount of attention has been paid to holistic thinking, but relatively little to the other two dimensions. In addition, we present evidence that managers will need to more fully develop systemic thinking skills as business systems become even more interdependent in the 21st century. Tools are presented that can be used in any area of business to help students develop their systemic thinking skills and gain better insights in their respective fields of study. Examples of how to introduce and use these tools in the classroom are also provided.     

国内外LIS领域阅读研究分析

[目的/意义]旨在为阅读推广后续研究提供参考。[方法/过程]分别以CNKI和WOS数据库作为数据来源,利用Bicomb2.0和SPSS软件进行共词分析和聚类分析,绘制战略坐标图,并梳理国内外阅读主题领域研究热点的成熟度。[结果/结论]国内外的阅读推广研究均发展到了较为成熟的阶段,但在国内图情领域还未发展成为领域核心,国外的相关研究中计量学等传统情报学分析技术方法利用更为广泛深入。数字阅读和移动阅读成为国内图情领域阅读主题研究的核心。社会化阅读、社交媒体与用户生成信息研究在国内外都还处于发展阶段,相关研究理论还未形成成熟的体系。     

Causal Relation Analysis of Economic Systems and the improvement of Syetem Dynamis(1)(2)

The Causal relation and whole-part relation are the two fundamen-tal relations in economics.In this paper,on the basis of economic prob-lems analysis in practioce,some causal relation structures of economic sys-tems and fundamental rules for operations research are,at first,prop-osed.And then,a quotienting(simplifying)analysis approach of eco-nomic causal relations is presented and discussed in detail.At last,animprovement framework of system dynamics is proposed based on theviewpoint of generalized causal relations analysis.