立方體對角線 的英文怎麼說

中文拼音 [lìfāngtǐduìjiǎoxiàn]
立方體對角線 英文
cube diagonal
  • 立 : 動1 （站） stand; remain in an erect position 2 （使豎立; 使物件的上端向上） erect; stand; set up...
  • 方 : Ⅰ名詞1 （方形; 方體） square 2 [數學] （乘方） involution; power 3 （方向） direction 4 （方面） ...
  • 體 : 體構詞成分。
  • 對 : Ⅰ動詞1 （回答） answer; reply 2 （對待; 對付） treat; cope with; counter 3 （朝; 向; 面對） be tr...
  • 角 : 角Ⅰ名詞1 （牛、羊、 鹿等頭上長出的堅硬的東西） horn 2 （古時軍中吹的樂器） bugle; horn 3 （形狀像...
  • 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
  • 立方 : 1. [數學] cube 2. [簡] （立方體） cube3. （立方米） cubic metre; stere
  1. And understanding and studying the spectral features and variation rules of geo - targets in the experimental area, raising that it is the basis of geo - targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo - targets, realizing that in a great extent spectral - integrated - form - based classification method can remove the phenomenon of " different spectrum with same objects " resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo - target with similar spectral forms and much different values of whole reflection ratio. it is suggested that " red edge " range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel - based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. the remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed

    研究結果如下：首先針對荒漠化地區的地物特徵，對高光譜數據不同波段的數據質量、波段組合進行了評價，提出了適用於荒漠化監測的基本波段選擇集；初步了解和掌握了研究地區的地物光譜特性及變異規律，進一步明確了掌握地物光譜特徵和變異規律是用成像光譜儀數據提取地物信息的基礎；發現了基於光譜整體形狀的分類方法在很大程度上能夠消除由於傳感器、地物目標觀測方向之間的角度變化引起的反射率曲線整體平移的「同物異譜」現象，對于譜形相似而整體反射率的值相差較大的兩類地物，通過引入均值和方差圖像參與分類得到解決；研究還表明在植被「紅邊」范圍內的波段是進行荒漠化監測的主要特徵波段，這些波段與植被生物量和蓋度都有密切的關系，是開展精細植被分類研究和植被定量反演的重要基礎；像元的導數光譜分析可以消除土壤背景的影響，是進行植被生物量和蓋度定量反演的有力工具；建立了荒漠化監測主要評價因子的定量反演模型，並分析了模型的適用性。
  2. Use the vector dot product to find the obtuse angle between two diagonals of a cube.

    用矢量點積求立方體的兩條對角線所夾的鈍角。
  3. This paper uses for reference with an example of frame - shear wall structure and studies the conceptual design and method for optimizationof structural system. through establishing frame - shear wall structure unisonous differential eguation and finding a result, the side shifting curve, moment and shear force distribution curve are obtained under inverted triangle load action on the frame - shear wall structure. after analyzing and comparing, the range of best rigid characteristics for such structure has be gotten

    本文結合框架-剪力墻實例，研討了結構體系的概念設計和整體優化方法。通過建立框-剪結構協同工作的微分方程及求解，得出框-剪結構在倒三角形荷載作用下的側移曲線、彎矩、剪力分佈曲線，經分析對比，得出框-剪結構最佳剛度特徵值區間。
  4. This paper focuses on the research of the stress mechanism of the ribbed shell structure in statics, dynamics and under the explosive load on the basis of the engineering practice of cave depot of single aircraft. in this paper, according to the classical shell theories, the basic differential equilibrium of the ribbed shell structure and the finite element analysis of 3d rippled plate are established, in which the function of annular ribs reinforcement bars and 3d ripped steel plates are distributed in the range of the steel, and the functions along the longitude direction of tension, bending, and torsion are neglected ; applied with dynamic analytical theory, the dynamic model of ribbed shell structure and the analytical theory model of elastic - plastic are set up ; the triangle series method is used to solve the displacement and stress under the distributed load and the concentrated load of the ribbed shell structure

    本文以軍用機場地面單機掩蔽庫工程建設為工程背景，首次對內襯三維波紋鋼板混凝土拱型復合結構的受力機理進行了靜力、動力和爆炸荷載的分析研究。根據將橫肋、鋼筋及三維波紋鋼板的作用均勻分佈在殼體范圍內的情況，忽略橫肋、鋼筋及三維波紋鋼板沿殼體母線方向的抗拉、抗彎及其抗扭作用，首次推導出了內襯三維波紋鋼板混凝土殼體的微分平衡方程，建立了有限元計算模型，並採用三角函數法，求解了三維波紋鋼板混凝土拱型復合結構在分佈荷載和集中荷載作用下的位移響應和應力響應，並與普通殼體進行了比較。
  5. This paper reviews the existing research methods for the water - yielding rules, presents the difference between the lab core and the real reservoir in macroscopic and microscopic geologic characteristics, integrated with the relative permeability curve and the methods for determination of the volumetric conformance efficiency of lab core and the real reservoir, and proposes a new method - conformance efficiency modification method that can be used to determine the theoretic water cut curve of the water drive oilfield

    在總結現有產水規律研究方法的基礎上，從考慮室內巖心與實際油藏宏觀，微觀地質特性差異的角度出發，結合相對滲透率曲線以及實驗巖心、實際油藏體積波及系數的確定方法，提出並建立了一種確定水驅油田理論含水率曲線的新方法波及系數修正法。
  6. The paper tend to study the bus rapid traffic ( brt ) system which is suit in the chinese big cities in today or the beginning decays of the 21 century. the system is mainly make up of the ; key bus rapid rout network. first, the thesis analysis the urban structure infect the urban " traffic demand in view of the urban planning. then due to urban public traffic need the paper study brt system and it ' s practice and development in foreign cities, for example, the successful experience in curitiba

    論文首先從城市規劃的角度入手，分析城市布局發展對城市客運需求的影響；然後根據城市客運交通的需要介紹和討論了快速公交的構成系統及其在國外庫里蒂巴等城市的發展經驗，並進行了總結；接著，對在我國大城市中構築快速公交網路進行探討研究，這也是論文的中心部分，在快速公交網路結構規劃方法上進行了一定的創新，提出了「分級規劃，分區布線」的快速公交線網規劃方法，並對網路結構中的換乘設施規劃設計進行研究，在整個快速公交網路規劃的基礎上建立了一套公交線網規劃的評價指標體系。
  7. The software ansys6. 0 is used to analysis the stability of the state after construction of tongwamen bridge, linear method is used in analyzing the finite element model of the bridge, the coeffient of stability of different state after construction is given. on the basis, the effect of different factors such as the arrangement of lateral brace, the sloping angle of arch ribs, the stiffness of bridge deck system, the effect of non - orientedly conservative loadings of the hanger and tie bar etc is discussed. the different coefficients of stability of changing these factors are given, so the factors that are vital to the lateral stability of x - type arches are found, and the rationality of the methods taken to enhance the lateral stability of tongwamen bridge is evaluated

    本文應用有限元分析商業軟體ansys6 . 0 ，採用線彈性方法，通過對該橋的空間有限元模型進行穩定性分析，得出其成橋運營階段各種工況下的穩定安全系數。在此基礎上，本文還通過有限元模型分析，就拱的矢跨比、吊桿（立柱）的非保向力效應、橋面系的剛度、橫撐布置形式、拱肋側傾角等因素對該橋整體穩定性的影響展開探討與研究。文中給出了各因素變化情況下的穩定安全系數，指出了對鋼管混凝土提籃拱橫向穩定性有顯著影響的因素及其合理變化范圍，並對銅瓦門大橋提高橫向穩定性的措施的經濟合理性進行了分析。
  8. The stability of electric power system has been being focused for a long time toprevent a power system from losing synchronism after sudden fault ， researchers have done much work and got many accomplishments this paper applied the direct feedback linearization ( dfl ) technique on the power system ， a strong nonlinear system simulation results by matlab proved this method efficiency main works and results are as follows ： this paper compared some existing methods in excitation control ， fast valve control and coordinated control respectively, analyzed the developments and actuality of nonlinear control research in brief, illustrated why ransient stability could be greatly improved by using the fast valve control in chapter 3 ， indicated the importance of coordinated control farther this paper introduced the inverse system theory, based on which ， discussed the dfl theory, pointed out which had consistency with the inverse theory, expanded the dfl theory combined the idiographic model equations ， made which adapt to the model of a single machine - infinite bus power system this paper referenced abundance articles and educed a set of equations ， which could describe the dynamical process of excitation and fast valve control for synchronous generators in the equations ， there were several very important parameters of power system - - rotor angle ( ) ， rotor speed ( ) ， generator q axis voltage ( eq ) ， transient voltage ( e ' q ) ， active power ( pe ) ， mechanical input power ( pm ) ， valve opening ( ) ， generator terminal voltage ( vt ) ， based on the model ， nonlinear coordinated controller and terminal voltage optimal controller have been designed by using the expanded dfl theory and lq optimal control theory the simulation results showed that the controller could keep power system transiently stable under the effects of a symmetrical 3 - phase short circuit fault ， which achieved better postfault regulation compared with another two routine methods ， one is the proportion excitation controller and proportion fast valve controller, the other is the proportion excitation controller and the optimal fast valve controller, which could exert good performance when met 1ittle disturbance either

    在介紹逆系統理論的基礎上，詳細介紹了dfl理論，通過比較闡明了dfl理論其本質是逆系統方法的一類，並結合具體課題推導出的模型方程將dfl理論進行了擴展，使之適應于電力系統這個強非線性對象。通過參考大量的書籍文獻推導出一套實用的可將大型汽輪發電機勵磁與汽門綜合起來進行控制的模型方程，此模型方程涵蓋了電力系統中特別引人注目的幾個量- -轉子角、轉子轉速、發電機q軸電勢eq 、暫態電勢e ' q 、有功功率pe 、機械功率pm 、汽門開度、機端電壓vt ，在此基礎上建立了實用的電力系統簡化的數學模型，並將擴展的dfl理論應用於此模型系統，結合線性二次型最優控制理論設計出大型汽輪發電機的非線性綜合控制器及機端電壓最優控制器，通過模擬實驗與採用常規的按電壓偏差進行調節的比例式勵磁控制器+汽門比例控制及採用常規的按電壓偏差進行調節的比例式勵磁調節器和基於二次型性能指標設計的最優快控汽門（考慮發電機的飽和因素）進行了對比，證實了採用此種控制器可以有效地提高電力系統的暫態穩定性，並且在電力系統遭受小干擾時同樣具有良好的調節性能。
  9. The phase structure, the lattice constant, crystal grain diameter of the samples was obtained by the x - ray diffractions ( xrd ) spectra. their relations are showed respectively. influence of grain size on the lattice constant of several kind of phase structure was studied theoretically by interaction energy between atoms in nanocrystallites

    其次，從結合能的角度出發，研究了nacl結構和cscl結構的離子晶體，面心立方（ fcc ） 、體心立方（ bcc ）金屬晶體以及簡立方（ scc ） 、面心立方（ fcc ） 、體心立方（ bcc ）結構分子晶體的晶粒線度對晶格常數的影響。
  10. According to the special shape and operate requirements of the torpedo, the structure and moulding process of the torpedo shell are established, in which the body and overlay block with grooves are moulded by fiber winding, and close moulding respectively with the adhesive by limited stop compression. in the light of the selection of raw material system, composite system with outstanding performance are defined, based on which the mechanical properties are tested., with the overall consideration of structural characters and design demands, the main factors which may have effects on the strength and stability ( including stiffness section dimension, stiffeners space, skin thickness and skin lay angle ) is optimized one by one for the structure design parameters on the base of the fem model of skin, stiffness and layover block by fem. as a result, the prototype with 1 : 1 proportion and its structure and lay optimization design are completed. the moulding technology for polyurethane foam moulding the stiffened shell is obtai ned in terms of the design, manufacture moulding, experimental mould and tooling

    依據在研產品特殊的外型結構和使用要求，確定了該型號水雷復合材料殼體的具體結構形式和復合成型工藝路線，即由纖維纏繞工藝成型主體異形件，閉模成型帶通槽外貼塊，用限位加壓工裝實現粘接的工藝路線；通過對原材料體系的篩選，確定了綜合性能較好的復合材料體系，以此為基礎進行了力學性能測試；運用有限元方法，建立了蒙皮、筋條和外貼塊的分析模型，綜合考慮結構特點和設計要求，對影響結構強度與穩定性的主要因素（包括筋截面尺寸、筋間距、蒙皮厚度、蒙皮鋪層角度）分別進行了結構設計參數的優選，最終完成了復合材料異形耐外壓殼體1 : 1樣件和縮比實驗件結構及鋪層優化設計；完成了聚氨酯泡沫胎成型內置加筋殼體的成型工藝技術研究；對縮比件進行外壓性能測試，並給出了應力、應變測試結果。
  11. For example, the administratively monopolized access regulation that caused the upper section ( railway network operation ) and lower section ( the transportation businesses ) integrated ; the relatively closed investment mechanism that at first mainly depended on government allocation, then mainly relied on railway ' s building fund ; the price regulation that controls the right of price setting strictly and keeps a low price level for a long time ; the income distribution regulation that with its income and expense carried out in two separate ways ; finally, the regulation framework that with the roles wrongly arranged and with inadequate supervision and lagged legislation

    由此可以看出，我國鐵路規制體制的計劃經濟痕跡非常明顯：在進入上，實行「上下一體」的行政性壟斷；在投資上，實行先以國家為主而後以鐵路建設基金為主的相對封閉的投資體制；在運價上，國家嚴格控制定價權，並長期以來保持低價位；在收益分配上，實行收支兩條線的清算制度；最後，在規制的組織架構方面，不僅角色錯位，而且缺乏監督，立法滯后。
  12. In the macroscopical field : ( 1 ) the relationship between the moisture and the speed of average collapse was attained, that is, the speed of average collapse will increase with increasing of the moisture at first, but it will decrease when the value get to certain max with increasing of the moisture ; ( 2 ) the model of relationship between the pressure and the speed of average collapse was established on the basis of experiment. the conclusion of that the speed of average collapse bouncing increase with increasing of the pressure was attained and the relationship between stress and distortion was established ; ( 3 ) the method of synthetical evaluation for collapsibility loess under the effect of time, pressure and moisture was offered

    在宏觀角度上： （ 1 ）以遼寧阜新地區黃土試樣的固結試驗數據為分析對象，得到了黃土濕陷速率與含水量的關系曲線呈單峰狀態的結論，即黃土濕陷速率在土體浸水初期會隨著含水量的增加而增大，但當含水量超過某一數值趨于飽和含水量時，黃土濕陷速率卻隨著含水量的增加而減小； （ 2 ）立了黃土濕陷速率與壓力之間關系的數學模型，得出了黃土濕陷速率隨壓力的增大而呈階越增長的結論以及阜新地區濕陷性黃土的本構關系； （ 3 ）提供了在時間、含水量及壓力等因素共同作用下，對黃土濕陷性進行綜合評價的方法。
  13. Engineering drawing has always been labeled as a practical subject. a combination of geometrical, building. mechanical and electrical drawing, it relates between theory and the picture of reality. engineering drawing will provide an accurate and complete ptcture for every object tn terms of shapes and sizes. usually, it is taught using the face - to - face teaching mode even in an odl environment. due to its nature, some students may find difficulty in imagining and interpreting the drawings. however, the availability of sophisticated technology provides the opportunity for the learning of engineering drawing to be enhanced via online. a web - based system for teaching and learning engineering drawing was developed based on a constructivism model. the web - based system is tailored for several topics of engineering drawing such as orthographic projection, sectional view, isometric and oblique drawing at the secondary level. the learning strategy consists of multiple phases beginning with introduction, concept learning, engineering drawing method, application and exercises. during introduction, students will be exposed to an overview of the topic followed by learning of specific concepts. the system provides a learning environment that allows engineering students to view objects from different angles, such as third angle projection and first angle projection as well as views of plans, side and front elevations. after learning about the concepts, students wilt be guided through the various steps in drawing methods for each topic via animations and simulations. learners are able to view any section repeatedly. examples of real application of engineering drawings were also given using graphic, animations and video. to evaluate students understanding, exercises were given at the end of each session

    工程制圖一直被認為是一門實踐性學科，其整合了幾何學、建築、力學、電子制圖等，從而將理論與現實圖像聯系起來，工程制圖能為每個不同形狀、尺寸的物體提供精確的、完整的圖像.通常，即使在開放與遠程教育環境中，工程制圖的教學也是通過面對面的教學模式來進行的.由於其特殊性，一些學習者可能難以想象並解釋這些圖像.然而，尖端的技術使得可以通過在線的方式加強工程制圖的學習.研究者基於建構主義模式開發了一個面向工程制圖教學和學習的網路系統.該系統適用於幾種工程制圖，例如展開圖、刻面圖、等角圖和斜角圖.學習過程包括導論、概念學習、工程制圖方法，以及應用與練習等階段.在導論階段，系統為學習者提供了專題簡介，然後是概念學習階段.系統所提供的學習環境允許工程專業的學生從三維透視、一維透視、平面圖、側立面、正立面等不同角度來觀察物體.經過概念學習階段后，系統將引導學生通過動畫和模擬學習每個專題中制圖方法的不同步驟，學習者也能重復觀察任何剖面.另外，還通過圖像、動畫和視頻等方式展示真實的工程制圖應用案例.最後，為了評價學生的理解能力，在每部分內容後面都附有相關的練習
  14. According to the mathematical model and the numerical method, the cavity shape and hydrodynamic characteristics of two kinds of head shape on cavitating axisymmetric bodies at zero attack are computed in this paper. because the discretization method have effect on the convergence of the results, different kinds of discretization are employed in the partially - cavitating and super - cavitating flows

    依據建立的數學模型與數值方法，對兩種典型的回轉體頭部線型（即頭部為光滑過渡曲線的回轉體和頭部有突變角度的回轉體）的局部空泡和超空泡繞流場進行了數值計算。
  15. It finds extensive applications in science research, engineering design, trail analysis on the criminal investigation spot, online detection automatically, quality control, machine vision, medicine diagnosis and etc. this thesis analyzes and summarizes the domestic and international researchers ’ work about stereo vision, and then concentrates on the research on some key techniques of stereo vision, such as camera calibration, corner detection, 3 - d matching and 3 - d reconstruction

    隨著科學技術和工業生產的發展，三維形面測量在現代工業及實際生產中起著越來越重要的作用，在科研、工程設計、刑事偵查現場痕跡分析、自動在線檢測、質量控制、機器視覺、醫學診斷等方面有著極其廣泛的應用前景。本文在分析和總結了當前國內外立體視覺研究工作的基礎上，針對其中的攝像機標定、角點檢測、立體匹配和三維重建四個關鍵技術部分開展研究，其主要成果如下: 1 .提出了一種改進的攝像機標定方法。
  16. By applying the kernel of the self - organization theories to the research of urban space development, the author studies the underlying rules of the urban space development in its process and system aspects and figures out a self - organizing view of it. taking shenzhen ' s urban space development as an example, the author indicates that the rapid space development of shenzhen city is the effect of the same directional compound of self - organization and organization by overlapping analyses of shenzhen ' s real urban space development and its urban planning. based on the theoretical research and case study and targeting at the problems in our existing master plan system, the author makes suggestions on the reform of master plan system, which lead to the same directional compound of self - organization and organization

    通過對自組織理論的引介，分析了城市復雜系統的發展演化，建立了自組織的城市發展觀；進一步針對城市空間系統，通過相關概念的梳理以及城市空間發展的復雜特性分析，從空間組織的角度剖析城市空間發展的內在機制，把城市空間發展歸結為一個自組織與他組織復合作用的過程；將系統自組織理論的核心原理應用於城市空間發展研究，探討城市空間發展自組織的內在機制並從過程研究和系統分析縱、橫兩條主線對城市空間發展自組織進行深入解析；以深圳城市空間發展為例，通過深圳空間發展和城市規劃的疊合比較，對深圳城市空間發展自組織進行實證研究，指出深圳城市空間的快速、健康發展得益於城市空間發展自組織與他組織的同向復合；在理論和實證研究的基礎上，針對我國城市總體規劃體系存在的問題，建立尋求自組織與他組織同向復合的規劃理念，為我國城市總體規劃操作體系及其編制方法的完善和革新提供了基於自組織的理念與方法。
  17. 3. research on the parameter influence between linear oil damper and vertical dynamics of railway vehicles by developing software for simulation and analysis, this item has done research work on the parameter influence between linear oil damper and the vertical dynamics of railway vehicles. this research work has achieved some fruits on the engineering optimal damping rate choice method on the installation and maintenance guide lines etc. for the axis - box dampers

    3 、線性油壓減振器與車輛垂向動力學研究為了向高速列車線性油壓減振器的參數優選提供方法，為其安裝與維護等問題提供了要求與準則，本文通過建立高速列車垂向動力學模擬與軸箱油壓減振器參數優選、運行分析軟體系統，從系統的角度對線性油壓減振器的運行與車輛垂向動力學品質的關系進行了研究。
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