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。     

因材施教、分类指导 全面提高计算技术达标水平

我校建筑经济设置的计算课程，按照教学大刚要求，珠算技术达标水平由原来的普通六级提高到五普通级，这就为教学工作提出了新的要求，增加了教学难度，为此，经过教学实践摸索，进行了因材施教．分类指导．普遍提高的教学方法的尝试，收到了较好的效果。     

数学王国历险记

却说众人历尽千辛万苦，终于找到了藏宝处，小兀得到了一个万能调动仪，而三位牧人也找到了他们家的祖传遗产——一个铜盒子。就在小π、小e和小s认真阅读万能调动仪的使用说明书的同时，三位牧人也迫不及待地打开了那个铜盒子，只见里面有几张单据和一封信，牧人们赶紧翻看起来，刚一看完，三人就一起大哭起来．小兀忙问怎么了，牧人们说出一段原委，小靠等人也感到唏嘘不已，只得安慰他们道：“好哥哥，现在的大局是营救孙悟空，待我们解决了这个大问题，然后大家共同商量，我想哥哥们的问题，肯定会有解决办法的．”     

一节精彩的“几何概型”公开课

有幸听到了一节几何概型的公开课，学生配合默契投入，课堂气氛和谐愉快，师生互动风落水上。自然成纹，听课教师如沐春风，耳目一新，更坚定了我们开展探究性学习的信心．这节课通过学生自主学习、主动思考、合作交流、归纳总结，使学生对知识的发生、发展有了切身的感受和清晰的理解，同时也提高了课堂效率，培养了学生的创新能力和实践能力，学生的才智和各种潜能也得到了充分的展示和发挥．     

柔中带刚，推陈出新，与新课程接轨——对2008年高考试题（湖北卷）的分析

2008年湖北高考数学试卷贯彻了《考试大纲》和《补充说明》的考试要求，融入了新课程理念，较好的体现了“平稳中重基础、朴实中显特色”的命题思想．全卷题型布局稳中求变，选择题、填空题坡度适当，解答题难易适中，应用题新旧兼顾，探究能力动态考查，合情推测之中隐含着深刻的数学背景．与2007年相比，笔者认为命题更加成熟、规范，正视了文理科考生的差异，合理的设计了文理科试卷的难度系数，     

碾压混凝土坝层面影响带渐变规律分析模型

针对碾压混凝土坝层面影响带具有渐变特性，基于复合材料分析思想，利用串联和并联模型，建立了碾压混凝土坝层面影响带渐变规律分析模型；并根据模型的不同状况，提出了，确定层面影响带厚度瞬时弹性模量、延迟弹性模量以及粘性系数等的方法，揭示了决定层面影响带性质的主要计算参数的渐变规律，表征了层面的渐变特性；在上述研究的基础上，建立了相应的三维粘弹性分析模型，研制了相应的各部分分析程序；实例表明，提出的确定层面影响带主要计算参数的方法以及建立的分析模型比较好地反映了碾压混凝土坝的工作性态。     

关于C_0半群渐近展开的几点注记(英文)

本文考察了Ｃ０半群渐近展开的一些成立条件，得到了一个较一般的结果，最后，给出了它在中子迁移方程中的应用，     

指数平均Bezier曲线族

利用指数平均族与Bezier曲线结合定义了指数平均Bezier曲线族．首先研究了指数平均族，阐述了指数平均族的单调性和正规性，其次由Bernstein函数定义得到n次s阶指数平均Bernstein函数，讨论了它与函数f之间的关系，最后，研究指数平均Bezier曲线族的性质，讨论了它的升阶，de casteljan算法，分割定理等．     

“双减”背景下初中数学教师的使命与担当

《义务教育数学课程标准(2022年版)》强化了课程育人导向，优化了课程内容结构，研制了学业质量标准，增强了指导性，加强了学段衔接.本文中结合2022年新课标的变化进行研究，探索了“双减”背景下初中数学教师在课堂教学、作业设计、课后服务等方面的实施策略，促使学生形成良好的数学素养.     

由2008年高考数学卷引起的思考及启示——半个多月来的部分来稿综述（续完）

3对高考题的解法的研究 还有一大批来稿属于奇思妙解．解法研究类，读来也给人以启发，至少，它们给我们提供了一个并非常规的思路，或者对一些常规解法进行了深入地分析，指出了要注意的细节，澄清了一些不清晰的思想．对此也介绍如下：     

第三方数据平台精准营销收费模式研究

第三方数据平台通过大数据分析技术为商家提供精准营销服务,本文研究了两个竞争商家通过同一个数据平台进行精准营销时,平台收费模式(费率佣金与按销量收费)对商家竞争以及平台与商家利润的影响。研究发现:1)费率佣金模式的绩效依赖于费率参数,在精准度高的情况下,它不能最大化平台与商家的利润。2)与费率佣金相比,按销量收费模式显著提高了商家的利润,并且平台与商家的利润都随费用参数的增加而增加。3)从收费模式选择的角度,精准度越高,按销量收费模式的优势越明显;费率佣金模式适用于垄断情况,而按销量收费模式更适用于竞争情况。4)费率佣金与按销量收费的结合可以实现平台与商家的共赢。研究结论为大数据驱动下的精准营销收费模式选择,以及“大数据平台”的盈利模式创新提供了理论参考。     

The Challenges of Scanner Data

Data capture at point of sale, using laser scanning technology, is now commonplace in retail outlets in developed economies. The volume of data collected is enormous (a single UK grocery superstore carries over 15 000 different lines, each with a unique 13 digit barcode and will sell 600 000 items per week). It has been recognized that, where point of sale data can be translated into meaningful information, there is scope for efficiency savings and exploitable competitive advantage. In UK grocery retailing the uses of scanner data have concentrated on operational aspects such as improved ordering systems and staff scheduling. There have, however, been many recent studies, predominantly in the USA, which have examined, using scanner data, the relationship between marketing variables (price, display, advertising, coupons, and other promotions) and customer purchasing behaviour. This paper presents an overview of these studies and identifies the opportunities for operational researchers to further the understanding of such relationships through modelling and data handling.     

钢铁企业订货系统模型的VENSIM建模与仿真实现

订货模型存在于大多数的公司中,用以根据销售情况组织公司生产.在简单生产-分配系统模型基础上,构建了钢铁企业零售商订货模型;运用系统动力学方法分析了该订货模型,并采用了阶跃函数描述了复杂变化的零售商销售状况,通过VENSIM建模与仿真分析,找出了零售商销售-订单-库存的相互关系;结果表明,钢铁企业生产-分配系统的特征与采用阶跃函数得出的结果非常相似,对钢铁企业零售商的订货策略具有指导意义.     

The Effect of Increased Risk on the Expected Proceeds and Sale Strategy of a Machine

In this paper, a machine is considered that at any moment of time can be in one of a finite number of states. Transitions of the machine between states are governed by a stationary Markov chain. The sale value of the machine is a random variable depending on the state of the machine and on its age. In this case the optimal sale strategy is to sell the machine when its sale value exceeds some critical limit (which is a function of the state and age of the machine).It is shown that when uncertainty rises (or equivalently, when the dispersion of the sale value rises), the critical limits which determine the optimal sale policy also rise. It is also shown that the expected discounted proceeds from operating the machine rise when uncertainty increases. In the formulation, the sale date of the machine is a random variable which depends on the random sale value of the machine. Increased uncertainty can either increase or decrease the expected value of the sale date depending on the values of the parameters of the problem.     

Two-level periodic marketing networks without market news

A model is constructed for a two-level periodic marketing network wherein traders buy goods from farmers in a number of spatially separated markets and transport them to urban centers for sale to consumers. It is assumed that there is no market news dissemination. As a result, market disturbances are transmitted throughout the network at a rate limited by the trading activity. Moreover, distant markets may even be isolated from local disturbances. This model possesses one and only one equilibrium state. That equilibrium state is asymptotically stable if the slopes of the various supply and demand functions are sufficiently restricted in the vicinity of the equilibrium state.     

Optimal trading and shipping of agricultural commodities

We develop and implement a model for a profit maximizing firm that provides an intermediation service between commodity producers and commodity end-users. We are motivated by the grain intermediation business at Los Grobo—one of the largest commodity-trading firms in South America. Producers and end-users are distributed over a realistic spatial network, and trade with the firm through contracts for delivery of grain during the marketing season. The firm owns spatially distributed storage facilities, and begins the marketing season with a portfolio of prearranged purchase and sale contracts with upstream and downstream counterparts. The firm aims to maximize profits while satisfying all previous commitments, possibly through the execution of new transactions. Under realistic constraints for capacities, network structure and shipping costs, we identify the optimal trading, storing and shipping policy for the firm as the solution of a profit-maximizing optimization problem, encoded as a minimum cost flow problem in a time-expanded network that captures both geography and time. We perform extensive numerical examples and show significant efficiency gains derived from the joint planning of logistics and trading.     

回报计划对重复购买行为模式的影响研究

客户回报计划已成为一种重要的关系营销手段。本文在讨论回报计划如何对稳定市场结构下的重复购买行为产生影响的基础上,通过建立NBD-DM随机模型,提供了一种研究消费者重复购买行为的模型方法,并利用一组护肤品品类销售的固定样本组数据(panel data)对该方法进行了实证分析。结果表明NBD-DM模型是研究消费者重复购买行为的有效模型方法,并且证实回报计划在改变客户重复购买行为上的有效性,其是企业建立长期客户关系的有效手段。最后讨论了结论对战略及营销管理实践的意义。     

免费更换策略下耐用品垄断厂商的定价研究

耐用品厂商向消费者提供一定时间期限的免费更换服务已成为一种市场销售策略.免费更换服务期限和所需的更换成本又影响着耐用品的销售价格和销售量.针对耐用品厂商提供免费更换服务的情况,通过建立动态决策模型利用最优控制理论研究垄断厂商有关耐用品最优定价和免费更换服务期限等问题.研究得到:免费更换服务期越长,耐用品最优销售价格越高,而耐用品最优销售量越低;在以最优价格销售耐用品时,免费更换服务期和更换成本均与产品耐用度成正比例关系.     

Multicriteria analysis in agricultural marketing: The case of French olive oil market

Agribusiness industries face a stiff competition originating mainly from the EU trade barrier’s removal and the rapidly changing marketing environment of the single European market. Therefore, certain need has been identified towards the development and proper utilization of updated market research tools and methodologies in the field of agricultural marketing. The aim of this paper is to show the usefulness of multicriteria approach in analyzing consumer’s preference data and its ability to support new product development processes by agricultural firms. The paper outlines first the philosophy of agricultural marketing by emphasizing on the features, which differentiate it from general marketing. Several methodological issues in agricultural marketing are then presented through a state-of-the art survey. Then, the paper develops a consumer-based methodology to support product development decisions where the key-role is played to determine the preference model which explains a single consumer’s ranking; a decision support system summarizes the analysis on the whole set of interviewed consumers to prescribe the `ideal' profile of a new product and to simulate its penetration strategy into the market. Results from the application of the methodology to a survey data base coming from the Paris olive oil market are presented. Finally, the paper concludes with some recommendations about marketing practice in agribusiness.     

An economic order quantity model with partial backordering and a special sale price

A constant unit purchase cost is one of the main assumptions in the classic economic order quantity model. In practice, suppliers sometimes offer special sale prices to stimulate sales or decrease inventories of certain items. In this paper we develop an EOQ model with a special sale price and partial backordering. We prove the convexity of the cost-reduction function if a special order is placed at the special sale price. A solution method is proposed and numerical examples are presented.