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solid geometry 立體幾何。

solid motor

According to the constituting of mathematics language ability , and the level of structure , and expressing differently , the mathematics language can be divided into the mathematics language identifying barrier , the comprehending barrier , transforming barrier , structuring barrier , organizing and expressing barrier etc . through the test and survey of students , and the interview to teachers in wuhan , xiantao and xiaogan , we have understand that the senior high school students are not good at exploring hidden factor of symbolic language and solving a mathematics problem by image , and mathematics language expression barrier is outstanding , and the transforming barrier in solid geometry is prominent 根據數學語言能力的組成成分,按照層次、表現的不同,可分為數學語言識別障礙、理解障礙、轉譯(或轉換)障礙、構造障礙、組織、表達障礙等。針對這些問題,分析成因。通過對湖北省武漢、仙桃、孝感等地部分學生的測試、調查和教師的訪談,了解到高中生數學語言學習方面存在不善于發掘符號語言的隱含條件,不善于利用圖式解題,數學語言表達障礙突出,立體幾何中數學語言的轉換障礙等問題。

? to make the solid have realistic surface , we adopt advanced solid modeling method - constructive solid geometry . ? to free end - user from overwork , we presents and realizes many auto - processing algorithms , such as searching of inner - point , definition of polygon ' s counter - clockwise direction , as well as generation of numeric control codes . ? to checkout the collision and interference between cutter and part , we accomplish numeric control machining simulation , which can help end - user validate the correctness and rationality of numeric control codes , so it is needless that do repetitive test - cut before normal manufacture 正如將在后續章節中所講述的那樣,我們在系統中采用了許多先進的技術,其中主要包括以下幾點:采用分層設計思想,使三維物體的設計得到了簡化;采用先進的實體造型方法,使所建立的實體真實感強;實現了內點自動查找、多邊形方向自動定義等算法,提高了系統的自動化水平;實現了刀具軌跡的自動生成、優化;實現了數控代碼的自動編寫,克服了手動編寫的缺點;實現了數控加工仿真,能檢驗數控代碼的正確性和合理性,并能自動檢測刀具與工件之間的干涉。

The key techniques for reverse engineering based on ct image are introduced . 3d reconstructed surface model does n ' t possess full geometry and topology information as solid geometry model . this dissertation presents an algorithm for rebuilding solid model from triangulated patch surface mod 介紹了基于ct圖象反求的主要技術;針對重建三維表面模型不具備象實體幾何模型的數據那樣的完備信息的特點,提出一種基于ct圖象的反求技術的實體幾何造型方法,將重建模型轉換為邊界表示的實體模型,并將其作為本研究所開發的特征造型系統3dmodeler中的一種反求工程實體造型手段。

So it can provide reliable information for the design and improvement of the connecting rod . the geometric model is built by using 3 - d cad software unigraphics ( ug18 ) , and the 3 - d solid geometry of the connecting rod is meshed by using msc . patran , an fem pre - and postprocessing software 本文采用了unigraphics 3d軟件進行實體幾何建模,應用有限元前處理軟件msc patran對連桿模型進行網格劃分、加載和約束的處理,然后提交到msc

In the mathematics teaching material of the current senior high school and mathematics test , necessary have a solution is relevant solid geometry , some region ' s mathematics test average isn ' t high , this topic is one of “ chief criminal “ s 現行高中數學教材和高考數學試題中,少不了有一個解答題是有關立體幾何的,一些地區的數學平均分不高,這個題目是“罪魁禍首”之一。

Abstract : this paper mainly utilizes the methods of formula , isometric transform , cut and complement , extremes and analyzing special section to calculate the volume in solid geometry 摘要:文章探討了用公式法、等體積變換法、割補法、極值法、分析特殊截面等方法求立體幾何中幾何體的體積。

With vector ' s ( a new tool of modern mathematics ) being introduced into solid geometry , there arise some new ways of dealing with solid geometry problems 摘要向量這一現代數學新工具引入立體幾何后處理立體幾何問題,有了新方法、新途徑。

The vigour of the formual of quntity product of space bivector in the solution of solid geometry problems 空間兩向量的數量積公式在立幾解題中的活力

A quick visible algorithm based on dynamic constructive solid geometry reconstruction 基于構造實體幾何模型動態重構的快速顯示算法

Constructive solid geometry 構造實體幾何

2 rossignac j r . constraints in constructive solid geometry 當然,表達的緊湊性也是需要考慮的重要因素。

Solving problem of seeking the value of angle in solid geometry with vector 向量法解立體幾何求角問題

Polygonization of implicit surfaces with constructive solid geometry 超形有兩個值得重視的特點。

Problems about cross section in solid geometry 立體幾何中的截面問題

The students are learning solid geometry 這些學生正在學習立體幾何學。

Solving problems in solid geometry by normal vector of plane 用平面法向量解立體幾何題

Applications of plan normal vector in solid geometry 平面法向量在立幾計算中的應用