無維參數 的英文怎麼說
中文拼音 [wúwéishēnshǔ]
無維參數
英文
dimensionless parameter-
Dbw, sbw series single - phase and three - phase super power voltage regultor of new age having the advantages of large capacity, high efficiency, wide range, high precision, strong protection, without wave - form distortion, reliadle operation and casy installation, etc
Sbw系列單、三相大功率電力穩壓器是我公司在參數照國際同類產品、結合我國國性的基礎上研製生產的新一代節能電力穩壓器，具有容量大、效率高、穩壓范圍寬、精度高、保護功能強、無波形畸變、運行可靠、維護簡便等特點。The naval ship, as a three - dimensional object, its complicated tossing movements are the whirligig movements circling space axis. among them, the heave oscillation of the deck is an important guidance parameter for the uav ’ s landing in the process of landing
艦艇作為三維空間物體，其顛簸運動是一個復雜的繞空間軸的旋轉運動，其中艦船甲板的升沉高度是艦載無人機著艦導引系統的一個重要參數。Then, depended on the expressing / feature / optimizing module under ug software, the compensating area parameters on the out place of side - plate for balancing action could be realized, and at the same time the close connecting parameter optimizing with 3d modeling could be carried out as well, finally the results from optimizing program were coincident with the parameters of the imported pumps
進而利用ug軟體的函數表達式和特徵建模及優化模塊，實現齒輪泵補償面基本參數的優化設計和軸套（側板）三維參數模型自動生成的無縫連接，所得結果與引進泵的基本參數比較吻合。A parallel computing software is established independently. this software is a cell - centered finite - volume, structured grid, multi - block code which solves the equations governing inviscid and viscous flow of a calorically perfect gas or of an arbitrary mixture of thermally perfect gas undergoing non - equilibrium chemical reactions
通過簡單的參數控制，該程序既可計算二維、軸又巾彌和三維量熱完全氣體，也可計算化判卜平衡流;既可計算無粘流，也可計算粘性流。However, due to the elastic deflection and vibration of the links, the flexible manipulator becomes an infinite dimension mimo system with distributed parameters, and is highly nonlinear and strong coupling. therefore, the model and the control of flexible manipulator are of great significance both in theory and in application
然而也正是由於連桿存在彈性變形和振動，使得柔性機械手成為一個高度非線性的、分佈參數的、強耦合的無窮維多輸入多輸出系統， ，因此其建模和控制也具有重要的理論意義和應用前景。Secondly, the basic methods for parameter identification and the identifiability of parameter identification are dissertated. through the example of the problem of heat emission in one - dimensional infinite slab, the identifiability of thermodynamic parameter of concrete is proved theoretically
論述了參數辨識的基本方法和參數可辨識性的條件，以一維無限大平板的散熱問題為例，從理論上論證了混凝土熱力學參數可辨識性。In 3d space, points on the infinite plane compose the absolute conic, and it contains the interior parameter information of camera. we use photography geometry character of circular point on the absolute conic to calculate camera interior parameter, exterior parameter can be obtained. we can obtain more accurate
在三維攝影空間中，無窮遠平面上的點構成了絕對二次曲線，由於二次曲線的像包含了攝像機的內部參數信息，我們利用了圓環點的像在二次曲線上的攝影幾何特性，從而確定攝像機的內部參數，進而求取攝像機運動的外部參數。Then the ideal models ( dielectric isolation structure with high - voltage interconnection and without high - voltage interconnection ) are simulated by a 2d device simulator medici respectively. according to the simulation results, the two models ’ breakdown mechanism is analyzed and compared, and the influence of the isolated trench structure parameter on breakdown - voltage is studied, synchronously
藉助二維數值模擬軟體medici對理想模型（有、無高壓互連線兩種情況的介質隔離結構）進行模擬，分析其耐壓機理，研究隔離槽參數（槽寬、槽內氧化層厚度）對擊穿電壓的影響。It was showed that dlc gradient film material had a good stability of hemocompatibility, for its surface almost had no changes. in comparison, the hemocompatibility of t16a14v became worse since its surface had been heavily scratched and dense oxide films on its surface had been destroyed. fratal theory and image processing method had been applied to calculate the fratal dimension of tribological surfaces furthermore to elavuate the surface morphology and roughness
摩擦表面具有多尺度相似性和隨機性的特點，採用分形幾何理論描述表面的粗糙程度及形貌特徵，三維表面的分形維數可以作為一種尺度無關的粗糙度評定參數，利用圖象處理方法，通過材料表面的掃描電鏡sem圖象灰度數據來計算三維表面的分形維數。Chapter one the dissertation introduce the status of national highway construction and pavement maintain, and the essence ideology of the pavement evaluation methods among national and abroad has been analyzed synthetically. the application status of the nondestructive and dynamical index in the pavement performance evaluation and their development basing on the traditional test methods has been introduced. the key points, the research content and the innovation of the dissertation have also been presented
第一章介紹了我國公路建設及路面維修改造的現狀，綜合分析了國內外現行的路面評價的基本方法和思想，介紹了無損檢測手段和動態參數在路面性能評價中的應用狀況，以及在傳統檢測評價手段的基礎上無損檢測技術的特點和路面動態分析的發展方向，並提出了本文所要解決的關鍵問題、研究內容及創新點。( 5 ) aimed at some parameters can n ' t measure directly from the 2 - dimension image, the paper indicate that can through near - ellipse calculation and using bp neural network to calculation the chest circumference of cattle
（ 5 ）針對獲取的二維圖像在測量時，有些參數無法直接測量的情況，本文提出通過近橢圓計算和人工神經網路數據擬合法，通過胸寬和胸深實現了對胸圍的計算。The method of change partial differential equation into ordinary differential equation is classified, the bifurcation and chaos in nonlinear schrodinger system is detected and the effectiveness of controlling chaos of buckling beam with parametric perturbation method is studied in details. chapter 7 is the summary and conclusion of the dissertation
第六章總結歸納了將非線性偏微分方程轉化為常微分方程的變換法，研究了一維無界區域上非線性薛定諤方程的分岔和混沌性質，解析地研究了用參數周期擾動法控制屈曲梁的混沌運動的效果。A useful technique has been provided and developed for the researching and analyzing the factors and variation of flow field in the intake duct of diesel engine. to find out a new method to measure flow measurement, different intake duct on different conditions are experimented and researched by real - time holographic interferometry. real - time holography interferometry has many characteristics, such as high precision, non - destructive, high contrast of interference fringes and full field test
該方法具有精度高、非接觸、條紋對比度好、對被測物體形狀和表面無特殊要求的特點，實驗了對三維非定常流動過程的可視化實時採集，為了解和分析不同流量、不同結構參數下進氣道內氣流運動狀態和流動特性的變化關系及其影響因素提供了一種有效的測試手段。There is a natural linear order relationship among the data of one - dimensional sample, so which can be ordered according to the size of the sample points, however, since there is no natural linear order relationship among data of multi - dimensional sample, it is impossible to gain multi - dimensional order statistics in accordance with the order of the size of sample, neither is it impossible to extend many useful methods for one - dimensional nonparametric oiatistics to those for high dimensional ones
對於一維樣本，由於數據之間存在一種自然的線性序關系，故可按照樣本的大小排序，從而得到秩向量。但對于多維樣本，數據之間則不存在自然的線性序關系，無法按照樣本的大小排序而得到高維樣本的次序統計量並由此把一維非參數統計的許多有用的方法直接推廣到高維情形，使得對多元數據的統計分析十分麻煩。But, pso convergence ' s speed become slow in latter iterative phase, and pso is easy to fall into local optimization. at present, some scholars improve base pso mostly using 3 methods : disperse algorithm, increase convergence speed, enhance particle ' kinds. in the paper, i put forward 2 methods aiming at local best resutl but not whole best result. i modify base pso using the last method. some scholars put forward times initializations, so i select best result after circulating some times to be a parameter of formula. first, put particle into some small region, and ensure every region having one paticle at least. second, every region ' s particle has probability transfer other regions. although increase running time, enhance particle ' kinds, decrese the probability of convergence far from whole best result. nerms ( network educational resource management system ) is one of the research projects in the science and technology development planning of jilin province. the aim of nerms is to organize and manage various twelve kinds of network educational resources effectively so that people can share and gain them easily and efficiently, so as to quicken the development of network education
但粒子群演算法仍存在如下不足:首先在多峰的情況下，粒子群有可能錯過全局最優解，遠離最優解的空間，最終得到局部最優解;其次在演算法收斂的情況下，由於所有的粒子都向最優解的方向群游，所有的粒子趨向同一，失去了粒子間解的多樣性，使得後期的收斂速度明顯變慢，同時演算法收斂到一定精度時，演算法無法繼續優化，本文對原始粒子群演算法提出了二點改進方案: 1 .演算法迭代到一定代數后，把此時找到的全局最優解當作速度更新公式的另一參數（本文稱之為階段最優解）再進行迭代; 2 .每次迭代過程中除最優解以外的每個粒子都有一定概率「變異」到一個步長以外的區域，其中「變異」的粒子在每一維上都隨機生成一個步長。This dissertation studies mainly the identification and the optimal control problem in parabolic pdes, including the existence of solutions of state equations and optimal solutions of the optimal control and the identification problems, optimality conditions, the relation between the state functions and the control functions ( identification parameters ), the algorithms of infinite - dimensional optimization problems deriving from the identification and the optimal control problem of distributed parameter system
本文主要研究拋物型分佈參數系統辨識與最優控制問題，包括狀態方程解和辨識與最優控制問題最優解的存在性、最優性條件、狀態函數與控制函數（識別參數）之間的關系及求解基於辨識與最優控制問題而產生的無窮維最優化問題的演算法。This paper introduces the development of data mining and the concepts and techniques about clustering will be discussed, and also mainly discusses the algorithm of cluster based on grid - density, then the algorithm will be applied to the system of insurance ? among the various algorithms of cluster put forward, they are usually based on the concepts of distance cluster o whether it is in the sense of traditional eculid distance such as " k - means " or others o these algorithms are usually inefficient when dealing with large data sets and data sets of high dimension and different kinds of attribute o further more, the number of clusters they can find usually depends on users " input 0 but this task is often a very tough one for the user0 at the same time, different inputs will have great effect on the veracity of the cluster ' s result 0 in this paper the algorithm of cluster based on grid - density will be discussed o it gives up the concepts of distance <, it can automatically find out all clusters in that subspaceo at the same time, it performs well when dealing with high dimensional data and has good scalability when the size of the data sets increases o
在以往提出的聚類演算法中，一般都是基於「距離（ distance ） 」聚類的概念。無論是傳統的歐氏幾何距離（ k - means ）演算法，還是其它意義上的距離演算法，這類演算法的缺點在於處理大數據集、高維數據集和不同類型屬性時往往不能奏效，而且，發現的聚類個數常常依賴于用戶指定的參數，但是，這往往對用戶來說是很難的，同時，不同參數往往會影響聚類結果的準確性。在本文里要討論的基於網格密度的聚類演算法，它拋棄了距離的概念，它的優點在於能夠自動發現存在聚類的最高維子空間；同時具有很好的處理高維數據和大數據集的數據表格的能力。分享友人