新课程理念下数学教师能力的重新诠释

在新课程实施中，一切都在发生着显著的变化；培养目标发生了变化，课程理念发生了变化，教学内容发生了变化，教学形式发生了变化，评价导向发生了变化，学生生活发生了变化，……．但是，所有这些变革与发展都需要一线教师以及相关人员的积极参与，教师自身的理论素养和实践     

水果摊的机会

以前，一个水果摊的老板因为年岁大了，无法久站招呼客人，于是就发启事招聘一名店员。
　　来了一个30多岁的男子，问老板一个月用多少钱请他来帮忙，老板笑着说：“我这小摊生意，哪里付得出月薪，当然是看你的努力了，一天能卖多少水果，收到的钱就给你十分之一，每天领现。”这个男子听了，上下打量打量小水果摊，说太没保障了，掉头走了。     

危机应对术

回忆去年的情况，用一段比较流行的话来说，基本上眼睛一闭一睁，发现世界变了，箭头的方向变了，指标的颜色变了，公司的形势变了，经营业绩变了。     

货运量预测方法的比较

本在对货运量预测理论和程序描述的基础上，介绍并比较了常用预测方法的优缺点，重点研究了三层BP神经网络的基本原理，构思了BP神经网络中长期货运量预测模型，并进行了预测，最后根据预测结果，分析了其用于预测的优缺点。     

营造文化数学氛围建构数学教育新观念

在日常数学教学活动中，愈来愈多的学生对数学学习的动力不是来自数学本身，而主要来自于考试的压力，学生被动的数学学习观念，不仅阻止了他们的主动性与探索性，扼杀了数学的魅力，而且不利于数学学科的发展，不利于学生创新思维能力及个人综合能力的形成．也就是说，学生学到了数学的壳，却丢掉了数学的核；学到了数学的形式，却扔掉了数学的美；学到了数学的方法，却抛弃了数学的灵魂．新一轮的数学课程改革提出了数学的应用性、文化性两个新观念，以通过课程、课堂及课外的途径，改变过去重结论轻过程、重理论轻应用、重知识轻能力的局面，给课堂以生机与活力．     

尚志市认真开展海峡两岸珠算比赛活动

为弘扬中华民族传统文化，庆港回归．加强海峡两岸学术文化交流，提高两岸学子学习珠算的兴趣，尚志市财政局按省璩算协会的要求．进行了广泛宣传，认真发动，精心组织，在尚志市职业教育中心学校、石头河子镇小学、供销合作联社学校积极开展了海峡两岸璩算通信比赛活动。参赛者热情高涨、精神振奋、严肃认真，赛出了风格，赛出了水平，再现了中华儿女的精神风貌。     

本期知识整合与能力提升

同学们，朋友们，通过本期的学习，我们认识了数的又一次扩展，理解了坐标的意义及函数关系，会进一步整理数据，知道了相似三角形的特征与识别方法，明确了直角三角形的边角关系，掌握了解决一些简单实际问题的方法，收获可真不小。     

模糊Bayes检验

本文对原假设和备择假设中参数是模糊子集的假设检验问题，引入了模糊Ｂａｙｅｓ检验的概念，对简单模糊假设，给出了求模糊Ｂａｙｅｓ检验的方法，讨论了它的性质，并针对一类特殊的隶属函数，得出了检验的具体公式。最后，通过几个数值实例，表明了模糊Ｂａｙｅｓ检验的优良性。     

北京中专教材数学概率一章的浅析

我们在教学中使用的北京中专数学新教材融人了教育改革的理念，适合北京特点，具有职业特色，选材多样，深入浅出、恰到好处，应用起来颇感得心应手．由于瞄准了高职，也受到了家长的好评，是几年来水平较高的教材，但概率一章教学中，有几处不明编者意图，特提出商榷，敬请赐教．     

BCI-代数中的几种理想

BCI－代数中的理想是一个极其重要的概念，本文引入两类不同的理想，即广义结合理想与拟右交错理想，研究了他们与思想，结合理想，P－理想的关系，并用广义结合理想子代数，刻画了广义结合BCI－代数，指明了拟右交错理想与结合理想的不同之处，用拟右交错理想刻画了拟右交错BCI－代数。     

Estimation of the number of components of finite mixtures of multivariate distributions

An estimator of the number of components of a finite mixture ofk-dimensional distributions is given on the basis of a one-dimensional independent random sample obtained by a transformation of ak-dimensional independent random sample. A consistency of the estimator is shown. Some simulation results are given in a case of finite mixtures of two-dimensional normal distributions.     

Galois Structure of K-Groups of Rings of Integers

N/Kbe a Galois extension of number fields with finite Galois group G.We describe a new approach for constructing invariants of the G-module structure of the K groups of the ring of integers of N in the Grothendieck group of finitely generated projective Z[G]modules. In various cases we can relate these classes, and their function field counterparts, to the root number class of Fröhlich and Cassou-Noguès.     

Eigenvector p-Bases of Rings of Constants of Derivations

Let A be a UFD of characteristic p > 0, let 𝒵 be a set of some eigenvectors of a derivation of A. We prove, under some additional assumptions, a necessary and sufficient condition for 𝒵 to be a p-basis of the minimal ring of constants containing 𝒵. The main preparatory result is the unique decomposition theorem with respect to a factor from a given subalgebra containing A^p.     

有资格限制的指派问题的求解方法

在实际的指派工作中，常会遇到某个人有没有资格去承担某项工作的问题，因此，本建立了有资格限制的指派问题的数学模型。在此数学模型中，将效益矩阵转化为判定矩阵，由此给出了判定此种指派问题是否有解的方法；在有解的情况下，进一步将效益矩阵转化为求解矩阵，从而将有资格限制的指派问题化为传统的指派问题来求解。最后给出了一个数值例子来说明这样的处理方法是有效的。     

On Sums of Coefficients of Products of Polynomials

We study the nilpotency of the sums of all coefficients of some sorts of products of polynomials over reversible, IFP, and NI rings, and introduce an SCN ring as a generalization. We characterize SCN rings in relation with related ring properties, and also provide several useful properties and ring extensions of SCN rings.     

Convergence of sequences of sets of associated primes

It is a well-known result of M. Brodmann that if is an ideal of a commutative Noetherian ring , then the set of associated primes of the -th power of is constant for all large . This paper is concerned with the following question: given a prime ideal of which is known to be in for all large integers , can one identify a term of the sequence beyond which will subsequently be an ever-present? This paper presents some results about convergence of sequences of sets of associated primes of graded components of finitely generated graded modules over a standard positively graded commutative Noetherian ring; those results are then applied to the above question.

     

Rates of Convergence of Means of Euclidean Functionals

Let L be the Euclidean functional with p-th power-weighted edges. Examples include the sum of the p-th power-weighted lengths of the edges in minimal spanning trees, traveling salesman tours, and minimal matchings. Motivated by the works of Steele, Redmond and Yukich (Ann. Appl. Probab. 4, 1057–1073, 1994, Stoch. Process. Appl. 61, 289–304, 1996) have shown that for n i.i.d. sample points {X ₁,…,X _n } from [0,1] ^d , L({X ₁,…,X _n })/n ^(d−p)/d converges a.s. to a finite constant. Here we bound the rate of convergence of EL({X ₁,…,X _n })/n ^(d−p)/d . Y. Koo supported by the BK21 project of the Department of Mathematics, Sungkyunkwan University. S. Lee supported by the BK21 project of the Department of Mathematics, Yonsei University.     

图表示范畴的两个子范畴

引进图表示范畴的两个子范畴,研究它们的同调性质。     

Asymptotics of families of solutions of nonlinear difference equations

One method to determine the asymptotics of particular solutions of a difference equation is by solving an associated asymptotic functional equation. Here we study the behaviour of the solutions in an asymptotic neighbourhood of such individual solutions. We identify several types of attraction and repulsion, which range from almost orthogonality to almost parallelness. Necessary and sufficient conditions for these types of behaviour are given.