similar curves 中文意思是什麼
similar curves
解釋
相似曲線-
Disigning coolant channel on the firebox of liquid rocket engine to loxodrome ( equal - angle helix ) groove can improve firebox coolant capability greatly. because the width dimension of loxodrome groove is narrow and the depth is deep, some machining methods are incapable, such as end - milling or electrochemistry. according to the peculiarities, a cnc disk - cutter - milling method which is composed of five motion axes with four simultaneously interpolated ones is researched. because most firebox generatrix is composed of complex curves, it is very difficult to get cnc cutting program with manual means. in order to deal with the problem, the loxodrome mathematics model is studied, and an auto - programming software system is developed. the software system can generate cnc cutting program of loxodrome on many kinds of turned surface. the constriction - distension segment of firebox is the most representative workpiece. the sharp changing of its generatrix slope makes loxodrome milling difficult. with the theory analyzing and practice cutting experiment, some applied techniques, which include milling mode and direction, choosing cutter diameter and cutting start point setting, are developed. adopting the technology above, tens regular workpiece have been manufacturing. the two - year manufacture practice has confirmed the validity and feasibility of developed loxodrome coolant channel milling method. the developed technology is also worth to be referenced to other similar workpiece
將液體火箭發動機燃燒室的冷卻通道設計為斜航線（等傾角螺旋線）槽形，可以大幅度改善燃燒室的冷卻性能.斜航線冷卻槽的槽寬尺寸較小而槽深尺寸較大，所以無法使用棒銑刀銑削、電化學等加工方式.針對這些特點，提出了五軸控制、四軸聯動的數控片銑刀銑削加工方法.由於燃燒室外表面的母線輪廓復雜，手工編制數控加工程序難度大.為了解決數控加工程序的編制問題，研究了斜航線的數學模型，開發了自動編程軟體系統.使用該系統，可以生成多種母線輪廓回轉體外表面上的斜航線數控加工程序.燃燒室收斂-擴張段的母線斜率變化大，加工難度大，是斜航線冷卻通道加工的最典型工件.經過理論分析和實際切削實驗，研究了針對該類型工件的片銑刀直徑選擇、銑削方式和方向、刀具調整和起刀點的設置等多項實際的加工方案.採用上述的一系列技術，已經成功地加工了數十個合格工件.經過兩年多的實際生產過程應用，驗證了所開發的斜航線冷卻通道加工方法的正確性和可行性.這些加工技術的研製成功，對其他相似類型零件的加工亦具有參考意義 -
We presented a novel method of searching for similar fragments of 3d curves, with this method, a hash vector is associated with each fixed - length fragments of 3d sherd. each vector consists of low frequence component of fourier - like spectrum for the distance between profile curve and the centroid
討論了基於hash矢量和fourier變換的輪廓曲線匹配方法，在匹配中不要求一段輪廓線與另外一段輪廓線完全匹配，而是把它們分成很多子段，再用這些子段來進行匹配。 -
This dissertation ' s problem just comes from this engineering background exactly. for this two kinds of cores, which were taken from the engineering place, this dissertation draws sample by computer and analyses the weight distributions, getting the weight curves, the middle weights, asymmetry coefficients and other physics characteristic indexes of them, and makes up the model samples which are similar to the factual weight distributions
本文對施工現場採用的10 100kg和1 800kg重量范圍的堤心石進行了隨機抽樣和重量級配分析，得到了描述這兩種堤心石類別的重量級配曲線、中值重量、不均勻系數等物理特性指標，並由此制備重量級配相似的模型樣本。 -
To meet the demands for large space and flexible compartmentation of buildings, laminated vierendeel trusses are adopted in high - position transfer story structures. first the bearing characteristics are analyzed, in which reasonable stiffness ratio of the upper chord, middle chord, and lower chord is derived. then combined with an actual engineering model ( 1 8 similar ratio ), the static loading and pseudo - dynamic tests of two models for laminated vierendeel truss used in transfer story structures are conducted, in which one model adopts reinforced concrete, and the other adopts prestressed concrete and shape steel concrete. seismic behaviors are analyzed, including inter - story displacement, base shear - displacement skeleton curves, and equivalent viscosity - damping curves. a program is programmed to carry out the elasto - plastic dynamic analysis, and displacement time - history curves of the two models are derived. the test and analysis results show that the laminated vierendeel truss with prestressed concrete and shape steel concrete has excellent seismic behaviors. it can solve the disadvantages of laminated vierendeel trusses used in transfer story structures. finally, some design suggestions are put forward, which can be referenced by similar engineering
為滿足建築物大空間和靈活隔斷要求，在高位轉換層結構中採用迭層空腹桁架結構.首先分析了其受力性能，得出了空腹桁架各構件合理的截面剛度以及布局形式.然後結合一實際工程，進行了兩榀迭層空腹桁架轉換結構模型（ 1 : 8相似比）的豎向荷載下靜力試驗以及擬動力試驗.其中一榀為普通混凝土迭層空腹桁架，另一榀配置了預應力和鋼骨混凝土，對比分析了兩模型的層間位移比、骨架曲線以及等效粘質阻力系數等抗震性能的比較，並進行了彈塑性動力分析.試驗和分析結果表明，配置預應力和型鋼混凝土的迭層空腹桁架轉換結構具有良好的抗震性能，可以成功地解決迭層空腹桁架作為轉換層結構所產生的弊端問題，最後對這類轉換層結構提出了相應的設計建議 -
The normalized factorial moments ( nfm ) show good scaling properties in isotropical partition of phase space ; the nfm ' s projected into three directions versus the. partition. number appear, to be saturated curves with similar in scaling behavior ; and the three hurst exponents are very close to unity. the levy - stability holds for the q = 2 ~ 5 order moments in 3 - dimensional phase - space
發現：三維歸一化階乘矩（ nfm ）的分佈呈現出很好的標度特性；階乘矩在各個方向上的一維投影呈現出彼此十分相似的飽和曲線，且特徵參量hurst指數都接近於1 ；高維相空間各階階乘矩的分佈滿足l vy穩定性的要求。 -
The fractal is a geometrical figure with self - similar symmetry, and it is an important tool for characterizing irregular structures in nature that are self - similar on certain length scales. for example, the koch curves can be viewed as a mathematical model for coastlines, percolation model can be used to mimic mixture of mental and insulator, self - avoiding walks can serve as a model for linear polymers, and rock fracture mode can stimulate the process of brittle fracture of rock, and so on
分形是具有自相似對稱性的幾何圖形，可用來模擬自然界中在一定尺度范圍內具有自相似對稱性的不規則結構，如koch曲線可用來模擬海岸線，滲流模型可模擬金屬絕緣體混合物，自迴避無規行走模型可模擬線性聚合物，巖裂模型可模擬真實巖體的脆性破裂等。 -
The result shows that the sufficient and necessary condition of the quadratic rational b - spline curve ' s curvature monotony is similar to the quadratic rational bezier curves ", but its condition is some different from the quadratic rational bezier curves " curve ' s rendering algorithm is an important content in computer graphics, cad
曲線的生成演算法是計算機圖形學的重要內容。對於一些基本曲線，如直線，圓，橢圓等，都有快速生成演算法，如畫直線的bresenham演算法， dda演算法，畫圓的bresenham演算法，中點法，正負法， pitterway的橢圓及拋物線繪制演算法等等。 -
As a result, the p - v curve of the target was a quasi - isentropic compression curve, which consisted of small hugoniot curves ( similar to isentropic curves ) from different original states, and was located betwee n the hungoniot curve and isentropic curve but closer to the latter. finally, on a two - stage light - gas gun, titanium alloy projectiles ( with mass of 0. 35 ~ 2. 80g ) were driven intact to hypervelocities as over 15km / s by 93w - ofc - tc4 - a1 - mb2 system flier - plate with graded wave impedance, although the fl
在二級輕氣炮上，利用93w - ofc一tc4一al一mb :系波阻抗梯度飛片成功將克量級（ 0 . 35一2 . 809 ）欽合金二級飛片發射到了15kln / s以上的超高速度，且二級飛片主體是完整性，但其平面性和飛行姿態還有待於今后的深入研究。 -
In the elastic term, the two load - displacement curves slope are similar, the new structure s slope is more greatly. stiffness is better than the traditional structure. but the new joint s crack load is littleer
在彈性階段兩者的荷載-位移曲線斜率相差不多，而且新的連接形式斜率還大一些，它的剛度較傳統連接形式要好，但新的連接形式樓板開裂荷載稍偏低，應採取加強措施來提高開裂荷載。 -
These results show that the dc i - v curves of series arrays emerged some transition location and the ic decreased at the same time, but the dc i - v curves of parallel arrays were similar to what the single josephson junction ' s was
由計算結果可看出，串聯陣列的直流i - v特性曲線上出現了多個轉變點，臨界電流也有所降低，而並聯陣列的直流i - v特性曲線和單個約瑟夫森結的直流i - v曲線類似。 -
Comparing the simulation curves with experiment curves, we found that they are similar. therefore, the dynamic mathematical model of the boiler steam - water system and its corresponding simulation model are valid
通過模擬曲線與實驗曲線對比可知，模擬曲線與實驗曲線變化趨勢基本一致，說明所建立的船用鍋爐汽水系統數學模型以及基於該模型的模擬符合實際系統。 -
From the restoring force model curves some parameters may be obtained, such as skeleton curves, which are similar to the curves under static load, initial rigidities of the joint, and rigidity degradation etc
從恢復力特性曲線得到了和一次加載相接近的骨架曲線，節點的初始剛度和剛度退化等參數。 -
Main works : fractal and mechanism of forming fractal of fault surface in rock masses is analyzed and examined with it ' s affect on failure process of mining rock masses ; fractal curves are constructed with matlab to simulate the fault surface. similar material modeling is carried out and the fractal weak - face effect of mining rock masses is studied. mechanics character of rock masses with fractal fault in mining condition is simulated with large finite element software an sys ; catastrophe model of fault activated by mining is constructed with catastrophe theory
主要工作有：檢測和分析了巖體斷層面的分形性和斷層面分形的形成機制及其對采動巖體破壞的影響機理；運用matlab構造了分形曲線來模擬分形斷層面，進行了相似材料模擬實驗，研究了采動巖體的分形弱面效應；採用大型有限元軟體ansys模擬了含有分形斷層面的巖體在采動條件下的力學性態；運用突變理論建立了采動斷層活化的突變模型。 -
The physical process of generating quasi - isentropic compression on target via flier - plates with graded wave impedance might be considered as the successive overlap of a series of small shock loading waves generated by the transition layers in the flier - plate. as a result, the p - v curve of the target was a quasi - isentropic compression curve, which consisted of small hugoniot curves ( similar to isentropic curves ) from different original states, and was located between the hungoniot curve and isentropic curve but closer to the latter
波阻抗梯度飛片對靶板的壓縮過程是一系列弱沖擊加載波相繼發生作用疊加的結果，靶板由此獲得的p - v線是一組通過不同起始狀態點的hugoniot線的連線，這條連線可以近似看作是由小段小段等熵線連接而成的準等熵線。 -
3. the performance of staggered joints is similar to ordinary joints ', not only about the plump of hysteresis curves, energy dissipation, but also the time, the rapidity of shear resistance decrease and the degree of joints stiffness degradation. only the displacement ductility coefficient in staggered joints is little smaller than in ordinary joints
錯層節點的抗震性能比普通節點的抗震性能基本差不多，不管是從梁端滯回曲線的飽滿程度、耗能系數，還是從節點承載力降低的早晚、快慢、節點剛度退化的程度上來說，都是這樣，唯有錯層節點的位移延性系數，要比普通節點的稍差一些。 -
In the second chapter, a class of polynomial blending functions of degree n + 1 is presented. based on the functions, we present polynomial curves with some shape parameters. the generated curves are similar with the degree n bezier curves
第二章給出一類n + 1次多項式調配函數，並由此構造了帶形狀參數的多項式曲線，生成曲線具有與n次b zier曲線類似的幾何性質。 -
The algorithm can be used to reconstruct of other similar fragments. 3 ) the paper introduced an elastic curve matching method where the notion of an alignment curve is used to represent a correspondence between two curves. the space of alignment curves is searched for one optimizing elastic energy
基本思想是曲線的對應關系可以用一條對準曲線來表示，然後在對準空間中搜索使得彈性形變能最優的對準曲線，這條曲線確定了兩輪廓曲線之間點的對應關系。 -
Many studies have given similar results with test score showing double - peak curves
許多研究結果都有類似的發現。 -
Therefore, spca gotten via selecting polynomial kernel functions is more accurate than pca in multi - index evaluation system, and has fewer dimensions. comparatively, for spca using gauss kernel function and laplace kernel function, it is required to normalize original data according to the category, and the constructed evaluation functions are better than the ones constructed via using pca. however, if variance contribution of first principal component of pca is more than 85 %, evaluation function curves of spca and pca are similar
在作多指標評價中，選用多項式核函數而得到的譜主成分分析，比主成分分析得到的主成分具有維數低且精度高的優點；而用gauss核函數和laplace核函數的譜主成分分析，需對原數據作同類別數據間的規范化，其構造的評價函數也優于用主成分方法構造的評價函數。 -
One liquid phase and two solid phases ) equilibrium curves of the 2d alternative ternary system are obtained. given a group of the attractive interactions " values, the phase diagrams that representing the equilibrium of one liquid phase and two solid phases, i. e. the knot triangles, are got, which are similar to the practice
接著，利用相似的方法，得到了決定二維三元替換式l - j系統的三相平衡曲線方程的表達式，給定勢參數后，得到了三元系統中的由兩固相與一液相形成的三相平衡相圖，即結三角。
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