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巧妙利用特殊值法,借助特殊值的选取,有时可以更加简捷地求解客观题.本文中结合2022年高考真题,剖析特殊值法的巧妙应用,总结特殊值法的解题技巧与规律. 相似文献
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从特殊到一般,再从一般到特殊,是认识事物的一般规律,这一规律在数学的认识活动中有着重要的应用.特殊与一般思想是初中数学重要的思想方法之一,本文中旨在通过举例探讨“特殊与一般”思想在解题中的应用策略. 相似文献
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"一般与特殊思想"是高中数学中一种重要的数学思想方法之一,特殊中孕育着一般,所以我们在解一些题目感到困难时,如果以退为进,由一般退到特殊,往往能发现解题的捷径.本文以函数问题为例,对几种"特殊"情况的把握进行说明. 相似文献
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存在于数学知识中的“特殊”情形,例如数学知识中一些特殊的存在形式、特殊的表达方式,某些定理或性质存在的一些特殊条件以及解决问题过程中的一些特殊方法等等,在学生的数学学习中都起到了重要的教育作用,不少“特殊”甚至还是理解数学知识,乃至最终解决问题的关键所在.1. 数学认识过程的切入点我们可以看到,在数学学习中,一个概念的产生、某一规律的形成,经常是从一些特殊的情形开始,通过分析、归纳、猜想与演绎等各种方法得到完成的,这是数学重要的思想方法———归纳推理,著名数学家高斯就曾说过,他的许多结论都是依赖归纳法而发现… 相似文献
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本文研究了特殊值 l-群的一类特殊的 l-同态象及 l-扩张闭性 .在非超 Archimedean的条件下 ,证明了 l-群 G是特殊值的当且仅当对于 G的每个闭 l-理想 K,G/ K与 K均是特殊值的 . 相似文献
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本文研究了一类非紧致的特殊拉格朗日子轨形的形变.通过结合一类强渐近锥形特殊拉格朗日子流形形变以及紧致的特殊拉格朗日子轨形形变理论,证明了一类非紧致特殊拉格朗日子轨形形变的模空间是一个光滑流形. 相似文献
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H. France-Jackson 《Acta Mathematica Hungarica》2002,93(3):249-251
Two special classes are said to be similar if they determine the same upper radical. A necessary and sufficient condition for a special radical to be generated by distinct similar special classes is given and all similar special classes generating a given special radical are described. 相似文献
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Nikolai A. Kudryashov 《Chaos, solitons, and fractals》2009,39(3):1447-1462
New special polynomials associated with rational solutions of the Painlevé hierarchies are introduced. The Hirota relations for these special polynomials are found. Differential-difference hierarchies to find special polynomials are presented. These formulae allow us to search special polynomials associated with the hierarchies. It is shown that rational solutions of the Caudrey–Dodd–Gibbon, the Kaup–Kupershmidt and the modified hierarchy for these ones can be obtained using new special polynomials. 相似文献
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Special ideals in partial abelian monoids 总被引:1,自引:0,他引:1
Under some conditions, the special congruences of partial abelian monoid are those induced by the special ideals, and a class of special ideals of partial abelian monoid has some upper and lower bound properties. 相似文献
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Richard H. Warren 《Applied mathematics and computation》1994,60(2-3):171-177
The paper surveys special cases of the traveling salesman problem that are in the literature. The tables include polynomial time recognition algorithms and relationships among special cases. As a result of research, the most general special cases are identified. The paper also contains a table of subclasses of the most general special cases. Applications and open questions are indicated. 相似文献
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Rainer E. Burkard 《Mathematical Programming》1997,79(1-3):55-69
We survey some recent advances in the field of polynomially solvable special cases of hard combinatorial optimization problems
like the travelling salesman problem, quadratic assignment problems and Steiner tree problems. Such special cases can be found
by considering special cost structures, the geometry of the problem, the special topology of the underlying graph structure
or by analyzing special algorithms. In particular we stress the importance of recognition algorithms. We comment on open problems
in this area and outline some lines for future research in this field.
This research has been supported by the Spezialforschungsbereich F 003 “Optimierung und Kontrolle”, Projektbereich Diskrete
Optimierung. 相似文献
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Ata Allah Taleizadeh David W. Pentico Mirbahador Aryanezhad Seyed Mohammad Ghoreyshi 《European Journal of Operational Research》2012
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. 相似文献
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简化了用"常数变易"法求常系数非齐次线性微分方程特解的过程,给出了求二阶常系数非齐次线性微分方程特解的一般公式.并将该方法推广到对n阶方程的降阶,从而求其特解.此方法简单实用,且运算量小. 相似文献
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In this paper, we focus on a special class of ideal projectors. With the aid of algebraic geometry, we prove that for this special class of ideal projectors, there exist “good” error formulas as defined by C. de Boor. Furthermore, we completely analyze the properties of the interpolation conditions matched by this special class of ideal projectors, and show that the ranges of this special class of ideal projectors are the minimal degree interpolation spaces with regard to their associated interpolation conditions. 相似文献
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王明建 《数学的实践与认识》2006,36(7):382-386
通过对一般Riccati方程进行初等变换,使之变为特殊的Riccati方程,然后利用公式、观察实验,或利用二阶微分方程的特解,或利用一阶微分方程组的特解等方法,求得这些Riccati方程的特解. 相似文献