中、美两国现行小学数学课程目标比较与分析

课程标准是学科教学改革的指导性文件,课程目标是课程标准的核心部分,它引领课程内容的选择、组织以及教学活动的开展,具有导向功能。2011年,我国颁发了《义务教育数学课程标准(2011年版)》(以下简称中国《课标(2011)》)。就在此前不久,由美国州长协会最佳实践中心和州首席教育官员理事会于2010年6月2日共同颁布了首部《共同核心州数学课程标准》(以下简称美国《课标》)。

走向儿童主动对话的学习生活

在现实生活中,人与人的交往主要通过言语实现,这种言语的交往与生俱来就是一种对话关系。语文教学面对的是一个广泛而深邃的言语世界,课文多以描述性语言呈现,它需要读者运用自己的经验和想象去创造,去加深认识与理解。因此语文教学就是教师在听说读写等语文教学实践中,引导学生与教师、学生、文本、教科书编者之间多重对话的过程,达到视界的融合、思维的碰撞、情感的交流、个性的张扬、教学的相长,形成自己独特的思想和言语表达方式。

Stability analysis for nonlinear multi-variable delay perturbation problems

This paper discusses the stability of theoretical solutions for nonlinear multi-variable delay perturbation problems (MVDPP) of the form x′(t)=f(x(t),x(t-τ 1(t)),...,x(t-τ m(t)),y(t),y(t-τ 1(t)),...,y(t-τ m(t))), and εy′(t)=g(x(t),x(t-τ 1(t)),...,x(t-τ m(t)),y(t),y(t-τ 1(t)),...,y(t-τ m(t))), where 0<ε1. A sufficient condition of stability for the systems is obtained. Additionally we prove the numerical solutions of the implicit Euler method are stable under this condition.

Barriers in performing physical assessment among nursing students:An integrative review

Objectives:This study aimed to identify barriers in performing physical assessments among nursing students through integrative review study.Methods:The literature were searched in Medline,CINAHL,ScienceDirect,Web of Science,ProQuest,and Taylor&Francis Online using the descriptors barrier,physical assessment,nursing student et al.Only English-language and peer-reviewed journal articles were included,and there were no year restrictions.Results:Twelve articles were selected for review.Two aspects were extracted:the barriers included personal challenges,challenges related to nursing education,challenges related to clinical practice;establishing competency-based education learning as a method to reduce physical assessment barriers.Student competencies and experiences were influenced by various factors that collectively hindered their successful performance of physical assessments.Conclusions:The review findings provide valuable insights into the complex issues involved in the performance of physical assessments and guidance for improvement in practice.A collaborative effort should be made to address the issues often faced by nursing students in performing routine physical assessments.Also,more constructive and competency-based teaching methods should be integrated into academic and clinical settings.

Emmanuel Levinas： Hermeneutics, Ethics, and Art

This article draws attention to the subject of art in Levinas＇s thinking through consideration of his philosophical language, which is aided by images, metaphors, and idioms of art. The primary image that will accompany our discussion throughout this article is the image of art as shadow, which Levinas incorporates into the title of the essay which he devotes to the subject of art： ＂Reality and Its Shadow＂. Thinking about art from the perspective of Levinas means thinking about image and essence, about which is visible before us and which we cannot see, and about the different ways in which art can express itself. Levinas＇s theory of interpretation is grounded in and guided by the field of ethics and addresses the ethical aspects of interpretation. Levinas approaches the discourse of interpretation not out of na＇ivet6 but rather based on a deep understanding of the field of hermeneutics, with all its shortcomings and challenges. Thinking of hermeneutics from an ethical perspective is no mere addition to the discussion but the very crux of the matter. An attempt to understand interpretation as an act of exposing the truth encounters serious philosophical and logical difficulties, whether we are seeking to discover the intention of the artist, the intent of a specific work of art, or a hidden form within the work itself. The engagement with Levinas＇s theory of hermeneutics, however, raises a different question which is the focus of this article： Can Levinas＇s theory of interpretation be applied to the realm of artistic creation, and if so, how？ This question is sharpened by the difficulties that Levinas himself poses to his readers by designating art as the ＂shadow＂ of reality and drawing attention to the egoistic dimension of the artistic act.

Integration of axiomatic design and theory of inventive problem solving for conceptual design

Axiomatic design (AD) and theory of inventive problem solving (TRIZ) are widely used in conceptual design. Both of them have limitations, however. We presented an integrated model of these two methods to increase the efficiency and quality of the problem solving process for conceptual design. AD is used for systematically defining and structuring a problem into a hierarchy. Sometimes, the design matrix is coupled in AD which indicates the functional requirements are coupled. TRIZ separation principles can be used to separate non-independent design parameters, which provide innovative solutions at each hierarchical level. We applied the integrated model to the heating and drying equipment of bitumen reproduction device. The result verifies that the integrated model can work very well in conceptual design.

Evaluation of the Assistant Function with Four Zeros and all Nonprincipal Characters but X1X2X3X4

To obtain a better Vinogradov's bound, assistant function with two or three zeros and all Dirichlet's characters has been evaluated. Assistant function g(X1,X2,X3,X4)with four zeros and all nonprincipal characters but X1X2X3X4 is constructed and evaluated in the paper. And the constant obtained is 8.395 511 841 994.

The Application of the Fixed-point Theory in Jacketed Solution of Singularly Perturbed Nonlinear Problem

In this paper,the fixed_point theorem is used to estimated an asymptotic solution of initial value problems for a class of third nonlinear differential equations which has double initial_layer properties. We obtain the uniformly valid asymptotic expansion of any orders including boundary layers.

数学教学中小学生注意力的培养

《数学课程标准》要求学生学有价值的知识,有实用性的知识,促使学生的发展,提高课堂教学的有效性,那就要求教师运用教学技巧,寻求新的教学途径,在教学中培养孩子们的注意力。通过培养小学生的注意力,使学生在数学上有提高,有进步,有收获。它既关注学生当前的发展,又关注学生未来的发展,可持续发展。通过课堂教学活动,让学生在认知和情感上均有所发展。心理学家研究发现,9-20岁的学生正处于创造思维的培育期。

中考数学新题型

在近两年各地中考数学试卷中,一批融入新理念、有创意、构思精巧的新型题脱颖而出.这些试题在注重基础知识、基本技能考查的同时,更加注重了对数学思想方法、应用能力和创新意识的考查.现举例如下:

Application of Traditional Chinese Medicine in medical practice：a survey of community residents in Beijing,China

OBJECTIVE:To investigate how community residents in Beijing understood and used Traditional Chinese Medicine(TCM) in their medical practice.METHODS:This was a cross-sectional study conducted on 3410 community residents from four large communities of Tongzhou district in Beijng,China.A validated, self-administered questionnaire comprised of three sections was used to gather the data.A systematic sampling procedure was applied to recruit the community residents.RESULTS:A total of 3410 participants completed the questionnaire survey.It showed that in highly educated residents, 33.4%(170) knew of the names of 3-10 Chinese herbals, 35.8%(182) knew of names of 3-10 traditional Chinese patent drug.Among all the respondent residents, 80.7%(2753)believed that TCM herbal therapy and TCM non-drug treatments were effective in disease treatment, health enhancement, 85.7%(2923) had taken traditional Chinese patent drug in their life,56.8%(1937) of residents had used herbal decoction, 40.0%(1365) had received non-drug treatment of TCM, such as acupuncture, massage, cupping, auricular acupuncture.Among the elderly residents, 11.4%(98) often used Chinese patent drug and 9.8%(85) often used herbal decoction.In addition, 70.8%(2415) of residents were willing to accept knowledge and information on TCM for health enhancement and disease prevention, such as medicated diet, medicinal tea, Tai Chi and Qi Gong, although 82.8%(2825) of residents had never used them.CONCLUSION:Chinese patent drug and herbal decoction are widely used in the communities in Beijing, and there existed a possible close correlation between high educational level and better understanding of TCM.Age and occupation also correlated with the attitude to TCM therapies.The characteristics of the residents should be considered seriously in the course of promoting the understanding and application of TCM.

Global Classical Solutions to Partially Dissipative Quasilinear Hyperbolic Systems

The author considers the Cauchy problem for quasilinear inhomogeneous hyperbolic systems.Under the assumption that the system is weakly dissipative,Hanouzet and Natalini established the global existence of smooth solutions for small initial data (in Arch.Rational Mech.Anal.,Vol.169,2003,pp.89-117).The aim of this paper is to give a completely different proof of this result with slightly different assumptions.

Temporal dynamics of mental impasses underlying insight-like problem solving

Insight problem solving is characterized by mental impasses,states of mind in which the problem solver does not know what to do next.Although many studies have investigated the neural correlates of insight problem solving,however,the question when mental impasses occur during insight problem solving has been rarely studied.The present study adopted high temporal resolution ERPs to investigate the temporal dynamics of an impasse underlying insight problem solving.Time locked ERPs were recorded associated with problems with impasses(PWI) and problems without impasses(POI).The problem types were determined by participants' subjective responses.The results revealed an early frontocentral P2 was linked with the preconscious awareness of mental impasses and a P3a was associated with fixed attention when the impasse formed.These findings suggest the impasse may occur initially at a relatively early stage and metacognition plays an important role in insight problem solving.

New Results on H_∞ Control of Linear Systems with Interval Time-Varying Delays

This paper is focused on the H_(∞) control problem for linear systems with interval timevarying delays.By employing a reciprocally convex combination approach and a delay decomposition approach,some new delay-dependent bounded real lemmas(BRLs) are derived such that the closedloop system is asymptotically stable with a prescribed H_(∞) level.The BRLs are then used to solve the H_(∞) controller design by incorporating with the cone complementary approach.Three numerical examples are finally given to show the validity of the proposed method.

Free Convective Nonaligned Non-Newtonian Flow with Non-linear Thermal Radiation

The present study explores the free convective oblique Casson fluid over a stretching surface with non-linear thermal radiation effects. The governing physical problem is modelled and transformed into a set of coupled non-linear ordinary differential equations by suitable similarity transformation, which are solved numerically with the help of shooting method keeping the convergence control of 10^(-5) in computations. Influence of pertinent physical parameters on normal, tangential velocity profiles and temperature are expressed through graphs. Physical quantities of interest such as skin friction coefficients and local heat flux are investigated numerically.

On a Quasilinear Elliptic Equation with Superlinear Nonlinearities

This work is devoted to studying a quasilinear elliptic boundary value problem with superlinear nonlinearities in a weighted Sobolev space in a domain of R^N. Based on the Galerkin method, Brouwer's theorem and the weighted compact Sobolev-type embedding theorem, a new result about the existence of solutions is revealed to the problem.