在AutoCAD中快速绘制机械图形中心线

本文针对AutoCAD不能直接绘制机械图形标准中心线的不足之处,提出了一种改进措施。根据平面几何的原理,利用AutoCAD菜单功能和VLISP工具制作一个绘制机械标准中心线的内部命令。使用该命令能快速、直接绘制机械图形标准中心线。     

画法几何及建筑制图(下)复习提要

本课程是工民建专业一门重要的技术基础课,要求同学们通过学习,能够正确使用绘图工具和仪器,掌握使用仪器作图的技能和方法;能够掌握正投影的基本理论和作图方法,正确选择和使用基本视图和特殊视图;能够正确绘制和阅读不太复杂的专业图,所绘制的图样应做到投影正确,视图选择及配置恰当,尺寸完全,字体工整,符合国家制图标准。1 制图基本知识1.1 线型工程图样主要以图来表示,而图形又依靠各种线型来表达,所以线型是表达图样的关键。线型中常用的有实线、虚线、点划线、双点划线、折断线、波浪线等,     

AutoCAD地质线型的定制和使用

AutoCAD线型库中很少或根本没有可供使用的地质制图常用线型,要使用AutoCAD绘制地质图,必须定制地质线型,简要讨论AutoCAD地质线型的定制和使用方法。     

CAD软件进行工程结构设计二次开发首先要解决的三个问题

CAD软件进行工程结构设计二次开发前 ,牵涉到中心线线型不一致化、Limits命令的繁琐重复设置和每一图形文件都有不同的初始化信息。本文提出这些问题的解决思路     

AutoCAD自定义线型和填充符号在矿图中的应用

AutoCAD提供了大量的线型和图案，缺少矿区地层中断层、岩石(泥岩、砂质泥岩、粉砂岩、细砂岩、中砂岩、粗砂岩、灰岩、沉积岩等)的线型和图案，不能满足矿图绘制的需要；以《煤矿地质测量图例》中断层上、下盘线型、泥质砂岩为蓝本创建了自定义的线型和填充符号，使用中实现了方便、快捷、准确性高的目的，较好地满足了矿图绘制的需要。     

用AUTOCAD2000合理设置线型比例

《AUTOCAD2000》软件绘制Center、Dashed、Dot、Phantom等线型时,画出的却是实线.这就需要合理设置线型比例.通过实例,讲述三种设置线型比例的方法及步骤,为学生学习此软件提供一些参考.     

平均K值法绘制标准曲线

标准曲线绘制是临床生物化学检验工作中进行物质定量检测的基本要求。绘制标准曲线的方法很多,本文介绍了采用平均K值法绘制标准曲线的方法,并同其它方法比较。提示本方法具有灵敏准确、快速简便的特点。     

用AUTOCAD2000合理设置线型比例

《AUTOCAD2000》软件绘制Center、Dashed、Dot、Phantom等线型时，画出的却是实线。这就需要合理设王线型比例。通过实例，讲述三种设置线型比例的方法及步骤，为学生学习此软件提供一些参考。     

一种支持多线宽直线反走样算法

从理论上说明了反走样现象的产生和解决办法,结合经典的DDA画线算法与Wu反走样算法,给出了一种任意线宽和复杂背景色下的直线反走样快速绘制算法:在x(y)轴上以一个像素单位的步长进行移动,而在直线的y(x)方向上根据直线的宽度,进行跨度像素填充,填充的色深值依赖于该像素到直线中心线的距离、原有背景色和当前直线绘制色。最后,对算法进行去浮点优化,给出了复杂度分析、实验结果及应用情况。     

一种支持多线宽直线反走样算法

从理论上说明了反走样现象的产生和解决办法,结合经典的DDA画线算法与Wu反走样算法,给出了一种任意线宽和复杂背景色下的直线反走样快速绘制算法:在x(y)轴上以一个像素单位的步长进行移动,而在直线的y(x)方向上根据直线的宽度,进行跨度像素填充,填充的色深值依赖于该像素到直线中心线的距离、原有背景色和当前直线绘制色。最后,对算法进行去浮点优化,给出了复杂度分析、实验结果及应用情况。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

Western and Eastern culture differences in commercial field

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.     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

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?     

只要努力,不要后悔

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.     

浅谈移民问题

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.     

风的曲线

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.     

团图为数的图中的闭团贯数

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.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.