共查询到20条相似文献，搜索用时 62 毫秒
1.
行列式与矩阵是大学数学《线性代数》的内容．在世界性数学课程改革的大背景下,不少国家或地区先后将其引入高中数学课程．行列式进入我国高中数学课程比较早．1923年颁布的高中《代数课程纲要》第一次有了行列式,且是独立章节呈现．以后的历次课改中,对行列式时而剔除时而引入, 相似文献
2.
曾令淮 《四川教育学院学报》1994,(3)
本文提出了在教学中如何处理关于行列式的引入与定义。通过解二元和三无线性方程组引入行列式概念，使其直观，自然，学生能较快较好地掌握行列式的定义，为后面学习行列式的性质及应用行列式解决实际问题打下较好的基础。 相似文献
3.
4.
5.
《赤峰学院学报(自然科学版)》2017,(6)
对行列式及其性质的几何意义进行研究,得到二阶行列式是平行四边形带符号的面积,三阶行列式是平行六面体带符号的体积,将其推广,引入超平行多面体和多个向量的向量积的概念,得到高阶行列式的几何意义是超平行多面体带符号的广义体积.最后,以二阶行列式为例,对行列式的性质进行了几何直观上的解释. 相似文献
6.
李静 《数学学习与研究(教研版)》2014,(21):112-113
行列式在高等代数中占有重要的地位,它是线性方程组、矩阵、向量空间和线性变换的基础.而行列式的计算具有一定的规律性和技巧性,其中范德蒙行列式以其独特的性质令人瞩目,在行列式的计算中,我们常用各种方法将非范德蒙行列式转化成范德蒙行列式进行计算,本文归纳阐述了其中三种常用但不易掌握的方法,并通过一些例题来演示这些方法. 相似文献
7.
牛海军 《中国科教创新导刊》2008,(17):140-140
范德蒙（Vandermonde）行列式是一种重要的行列式,在行列式的计算中可以把一些特殊的或类似于范德蒙行列式的行列式转化为范德蒙行列式,本文通过一些例题来阐述这些方法。 相似文献
8.
9.
《佳木斯教育学院学报》2018,(7)
行列式计算是高等数学中基础而重要的内容。本文通过一道阶行列式的多种解法,归纳总结出了计算行列式的几种常见方法,并指明了使用这些方法的条件、技巧和应用原则。 相似文献
10.
11.
罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
12.
Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
13.
Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
14.
15.
16.
《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
17.
陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
18.
邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
19.
《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
20.
Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献