房地产项目整体定位与经济评价

在市场经济条件下我国房地产业进人快速、稳定的发展阶段，新世纪中国房地产行业面临极为难得的发展机遇，如何在竞争日趋激烈的情况下规避风险，提高利润率，实现项目的利润最大化，是我国房地产业能否持续、健康、稳定发展的重大问题之一。房地产项目策划能有效整合房地产项目资源，探索解决企业发展中的问题，增强企业的管理创新能力。本文为了实现项目经济效益、社会效益、环境效益的目标设定，科学地运用了房地产项目策划理论体系，探讨了房地产项目策划的作用、方体体系和运作程序，并运用于合肥某项目的工程实践中，得到房地产项目策划的一些经验和结论，为以后相关方面的理论研究和实践活动提供了借鉴和参考。     

The reality of Mathematics

The power of mathematics is discussed as a way of expressing reasoning, aesthetics and insight in symbolic non-verbal communication. The human culture of discovering mathematical ways of thinking in the enterprise of exploring the understanding of the nature and the evolution of our world through hypotheses, theories and experimental affirmation of the scientific notion of algorithmic and non-algorithmic ‘computation’, is examined and commended upon.     

A characterization of dynamic reasoning: Reasoning with time as parameter

Students incorporate and use the implicit and explicit parameter time to support their mathematical reasoning and deepen their understandings as they participate in a differential equations class during instruction on solutions to systems of differential equations. Therefore, dynamic reasoning is defined as developing and using conceptualizations about time as a parameter that implicitly or explicitly coordinates with other quantities to understand and solve problems. Students participate in the following types of mathematical activity related to dynamic reasoning: making time an explicit quantity, using the metaphor of time as “unidimensional space”, using time to reason both quantitatively and qualitatively, using three-dimensional visualization of time related functions, fusing context and representation of time related functions, and using the fictive motion metaphor for function. The purpose of this article is to present a characterization of dynamic reasoning and promote more explicit attention to this type of reasoning by teachers in K-16 mathematics in order to improve student understanding in time related areas of mathematics.     

Applied model of a round cylinder reinforced with systems of yarns at large tensile,inflation, and torsional deformations

Equations for a round cylinder weakly reinforced with systems of yarns and subjected to large tensile, inflation, and torsional deformations are presented. Since the degree of filling is small, the model of uniaxial stress state is assumed. The fibers are aligned with spirals on cylindrical surfaces and with radii in the transverse and meridional sections of the cylinder. The equations are obtained in the macroscopically unidimensional statement for the case of cylindrically symmetric strains. Numerical results are given for twisted hollow rubber cylinders reinforced with polymer yarns in the axial and radial directions. __________ Translated from Mekhanika Kompozitnykh Materialov, Vol. 43, No. 2, pp. 237–256, March–April, 2007.     

An Eulerian‐Lagrangian method for option pricing in finance

This article is devoted to the development and application of an Eulerian‐Lagrangian method (ELM) for the solution of the Black‐Scholes partial differential equation for the valuation of European option contracts. This method fully utilizes the transient behavior of the governing equations and generates very accurate option's fair values and their derivatives also known as option Greeks, even if coarse spatial grids and large time steps are used. Numerical experiments on two standard option contracts are presented which show that the ELM method (favorably) compares in terms of accuracy and efficiency to many other well‐perceived methods. © 2006 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq 23: 293–329, 2007     

分组化验的优化模型

依据数学理论证明在一定条件下,通过分组化验的方法可以减少化验次数;并给出了选择方法;建立了一个减少化验次数的优化模型.     

“双语教学”在数学教学改革中的实践与创新

在数学课堂上如何进行双语教学,如何使双语教学达到比较理想的教学效果,对这一问题还没有一个较清晰的令人满意的答案.作者从教学内容,教学设计以及英语在课堂中的使用这三个方面进行了探索和实践..     

Unique solutions

It is folklore that if a continuous function on a complete metric space has approximate roots and in a uniform manner at most one root, then it actually has a root, which of course is uniquely determined. Also in Bishop's constructive mathematics with countable choice, the general setting of the present note, there is a simple method to validate this heuristic principle. The unique solution even becomes a continuous function in the parameters by a mild modification of the uniqueness hypothesis. Moreover, Brouwer's fan theorem for decidable bars turns out to be equivalent to the statement that, for uniformly continuous functions on a compact metric space, the crucial uniform “at most one” condition follows from its non‐uniform counterpart. This classification in the spirit of the constructive reverse mathematics, as propagated by Ishihara and others, sharpens an earlier result obtained jointly with Berger and Bridges. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

水质COD、DO测试结果可信度的未确知数分析方法

水质COD、DO测试易受各种主、客观因素影响，其测试结果是一具有可信度的未确知数。为确保测试结果能正确反映所测COD、DO实际情况，进行测试结果的可信度分析显得尤为重要；为此，本文将未确知数理论运算应用于水质COD、DO测试结果的可信度分析，以确保测试结果的可靠性。经理论分析和实际测试表明，该法较好地评判水中COD、DO测试结果以及相应于结果的可信度，可推广应用于水质分析。     

小议数学发展的哲学问题及其在数学与计算机科学关系中的表现

本文从哲学角度讨论数学与实践的联系 ,并以数学与计算机科学的关系为例说明这种联系 .