dimensional errors 中文意思是什麼

Checking each step of a derivation for dimensional consistency is a useful way to look for errors.

對推導過程的每一步，都核對一下量綱是否一致，這是發現謬誤的好辦法。

For solving all these problems, through applying visualization technology of engineer design to the design of oil - feed unit, this paper constructs the entity model of oil - feed unit, establish the three - dimensional standard parts, implement the semi - automated and automated connect, and produce automatically the 2d or 3d part drawings. using this system the designer can observe and evaluate the space model of the unit, discuss the feasibility of space layout and the probable errors, so that the decision can be optimized and the competition of enterprise can be improved greatly

針對船舶供油單元設計、製造中的上述問題，本系統擬將工程設計可視化技術應用於船舶供油單元的設計，構造船舶供油單元的三維實體模型，建立三維標準件庫，實現管路的自動、半自動連接，自動生成管路的二維和三維零件圖，使得設計人員在設計階段就可觀察、評判單元的空間模型，直觀地探討空間布置的合理性和存在的問題，從而幫助決策的優化，提高企業競爭力。

The algorithm generates three - dimensional terrain model and displays in real time. it uses an efficient and simple method to attain the dependency between sampling points on terrain, and refines the center points in top - down way. it incorporates the dependency of points into their errors so that the cracks inside the terrain block are avoided, at the same time eliminates the cracks at the edges of blocks through adjusting the elevations of those points that cause the cracks

該演算法基於規則格網數據實時生成三維地形模型，並實時顯示；採用了一種簡單而高效的方法來求解采樣點之間的依賴關系；以「從頂向下」方式細分中心頂點；並把頂點依賴關系融合進頂點誤差中，避免了地形塊內部的裂縫，同時通過調整塊邊界點的高程消除了塊邊界處的裂縫；演算法還具有利用幀間相關性，視相關等方面特點。

A nonlinear numerical model for wave transformation is established in time domain based on integral equation transformed from two dimensional laplace equation. then the model is applied to compute the linear wave and nonlinear wave deformation in offshore flow field. a new 0 - 1 combined bem ( boundary element method ) is adopted in this thesis to avoid computational errors accumulated with time steps

本文以波動勢函數的laplace方程的green積分轉換得到的邊界積分方程為基本控制方程，建立了一種新的時域內波浪變形計算的數值模型，籍此對非線性波浪在結構物周圍的波浪形態進行了數值模擬，並通過數值造波水槽內的波浪試驗對數值模擬結果進行檢驗。

According to the measured values of the joint angles and the end - effector positions, jacobian matrix is calculated, and errors between the desired and the measured positions of the end - effector are exported to the least square method to determine the compensation for the dimensional parameters of the robot

通過機器人關節角和末端手爪位置的測量數據，計算雅可比矩陣以及手爪位置理論值和實測值的誤差，採用最小二乘法對機器人的尺寸參數進行補償量的計算。

After analyzing and studying the characteristics of the sequence generation of grey system theory, this paper proposes the concept of three - dimensional data sequence, extends the grey system theory from one - dimensional data sequence to three - dimensional data sequence and enlarges the application range of the theory in engineering. this paper also proposes a decomposition coefficient selection method and a partial concave - convex characteristic decision method to the preference generation, which can solve the problem that the internal point generated by the original method was inconsistent with the actual system. considering the errors existed in ends generation with step ratio and smooth ratio methods, the author proposes a tendency average generation and improves the quality of the generation greatly

灰色建模與逆向工程兩者有其十分相似的內在關系，本文通過學科交叉，深入研究兩種不同學科理論，在繼承灰色系統理論這一我國原創性理論思想的基礎上，補充和豐富了新的內涵並將其滲透到逆向工程中的數據測量與數據處理技術的應用之中，使機械工程中甚少應用的這一灰色系統理論得到了進一步的拓展，主要成果如下: 1 .分析研究了灰色系統理論中序列生成的特點，提出了三維數據序列的概念，將灰理論的一維數據序列拓展到三維數據序列，拓寬了灰理論在工程中的應用范圍;提出了有偏生成演算法中生成系數分解選取方法和數據序列點局部凹凸特性決定生成系數的方法，解決了原有方法生成內點與實際系統不一致的現象;針對級比和光滑比用於生成端點有較大誤差的情況，提出了趨勢均值生成演算法，大大提高了端點生成的精度。

The measuring system to measure the dimensional rotation errors of the namcs is configured. the principium experiment verified this method. 3

將相位偏移干涉測量技術應用於測量與校準系統運動轉角誤差測量，初步試驗驗證了該方法的可行性。

The paper set about from the reason of error produced in the course of transferring cad model to stl files. it is found out that surface - meshing process has important effect on precision which results in the emergence of errors. by combining with using typical three - dimensional paint software, the control parameter in transferring process, namely the chord height, is optimized

首先從stl轉化過程中誤差產生的原因著手，找到表面網格化處理這個因素會對精度產生影響，結合具有代表性的三維造型軟體，對轉化過程中控制參數（弦高）進行優化，得到既能滿足三維實體精度要求，又不需要佔用太多時間、空間等情況下的最佳弦高選用值。