共查询到20条相似文献，搜索用时 62 毫秒
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本文主要介绍了空间几何体的直观图的画法,先介绍了空间几何体的直观图的准确画法—斜二测画法与正等测画法的要点和原理,然后介绍了圆的直观图的近似画法——菱形法和圆V法的作法和特征,并列举了几个例子说明"圆V法"画法的优越性。 相似文献
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孔峡平 《中国教育发展研究杂志》2009,6(8):162-162
透明画法是古典油画的传统技法,它和直接画法在材料和技法方面有很大不同,二者的视觉效果也大不相同。学习和掌握透明画法,研究透明画法的技法对于丰富油画语言很有助益。本丈就笔者学习、研究透明画法的心得作一总结。 相似文献
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对一些逻辑电路教材中组合逻辑图的画法进行分析改进，提出了另一种新画法－整齐画法，该画法可以增加电路图的可读性，便于学生容易理论和掌握。 相似文献
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王小娟 《晋城职业技术学院学报》2011,4(3):58-59,62
产品的图样在国际上通常的画法有第一角和第三角画法两种,茶文通过对这两种画法的分析,对二者的异同进行了详细的对比,提出了这两种画法的近似转换方法,为阅读图纸提供参考依据。 相似文献
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椭圆的近似画法是制图学和画法几何学中很重要的组成部分.文章在对原有的两种近似画法进行研讨的基础上,推出一种新的斜二测椭圆近似画法.并对这三种斜二测椭圆近似画法及作图结果同标准斜二测椭圆进行比较.通过使用AUTOCAD14(计算机制图)的比较可以看出,新的斜二测近似椭圆与斜二测椭圆的图形更接近、画法更简洁. 相似文献
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锥齿轮是机械制造工程中的常用件之一.锥齿轮画法是图形绘制的关键.常规画法速度慢且步骤复杂.采用圆周定位法,把球面渐开线啮合原理运用于直齿圆锥齿轮画法中,不但符合GB/T4459.2-2003之锥齿轮画法规定,同时使绘制图形简明、准确、实用、快捷. 相似文献
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椭圆的近似画法是制图学和画法几何学中很重要的组成部分。文章在对原有的两种近似画法进行研讨的基础上，推出一种新的斜二测椭圆近似画法。并对这三种斜二测椭圆近似画法及作图结果同标准斜二测椭圆进行比较。通过使用AUTOCAD14（计算机制图）的比较可以看出，新的斜二测近似椭圆与斜二测椭圆的图形更接近、画法更简洁。 相似文献
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五、常见画法分析下面选择了钢筋混凝土结构施工图中一些常见画法的实例进行分析和说明。限于篇幅,钢、木结构施工图的常见画法就不再阐述。1.基础平面图 相似文献
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画法几何学中的投影图画法,目前尚未有统一的标准规定。有些画法可以参照“机械制图”国家标准,但也还有些画法无可参照,致使教材中的画法极不一致,有的不画素线的包络线——外形线,有的不画边界轮廓线,或边界轮廓线不是按其可见与否画成粗实线或虚线。而素线有的用细实线只画到与包络线相切的切点位置,有的则画全长;有的可见时画成细实 相似文献
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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
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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
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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
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《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
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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
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《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
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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