近似圓 的英文怎麼說

中文拼音 [jìnsìyuán]
近似圓 英文
approximate circle
  • 近 : Ⅰ形容詞1 （空間或時間距離短） near; close 2 （接近） approaching; approximately; close to 3 （親...
  • 近似 : approximate; similar; approach; approximation; roughness; propinquity
  1. In the course of working, ， the plow will make use of the shuttling method so that it can dig alternately either on the left or on the right. compared to the unilateral plow, it can improve the productivity because it can help leave off the soil 、 take from the consumed energy and reduce the empty journey. to meet the requests above, we will use a remote cylinder with both a small cubage and double functions, approximately designing the plow to be columniform and symmetric. after the experiment for a period in the field, we found that the most frayed areas had happened at the places of both plow shank and share and at the same time the base of the remote cylinder had ruptured suddenly

    與單向犁相比，其優點在於：耕地無開、閉壟，地表平整，降低了耕后整地的能量消耗，減少了地頭的空行程，因而大大提高班次生產率。為了滿足犁體梭式作業的要求，我們採用了一隻小容積雙作用的液壓油缸；同時對犁壁曲面的形狀採用了近似圓柱形的對稱設計。但經過一段時間的田間試驗，我們發現：該犁犁胸部分的犁脛和犁鏵上的犁尖在工作中磨損較為嚴重；主犁梁和油缸缸體的連接部分（即油缸底座）突然發生了斷裂，造成整個犁體無法正常工作。
  2. Approximation solution of characteristic equation of guide wave in a semicircle tunnel

    半圓形隧道中導行波特徵方程的近似求解
  3. The optimum designs of a good and applied outer pressure tank structure of submarine ? quasi - homocentric structure, based on approximate analytical methods and finite element stress analysis method are made

    提出了準同心圓式潛艇外部耐壓液艙結構是一種優良實用的結構型式，給出了這種結構基於近似解析法和基於有限元應力分析的結構優化設計方法。
  4. Most viruses are spherical or roughly spherical.

    多數病毒呈圓形或近似圓形。
  5. First, the nonlinear ls problem without constraint is converted to that subjected to inequality constraints by putting constraints on the do as of the received signals and toas of the first arrived signal with geometrically based single - bounce ( gbsb ) statistical channel model and cost - 207 model. then, a penalty function is used in the estimation of ms position

    首先，用基於幾何結構的單次反射圓模型和cost - 207模型，對期望定位用戶的各條多徑信號的波達方向和最先到達多徑信號的時間進行約束，將傳統的解無約束的非線性最小二乘定位問題或近似線性最小二乘定位問題轉化為解不等式約束的非線性最小二乘定位問題；然後，用內點罰函數法估計移動臺的位置。
  6. This paper puts out the edge shapes curvilinear equations, of the edge shapes of double circular gear hob, and analyzes the tooth surfaces characterist. it also points out that the gear hob is a kind of approximate shape building cutting too ls in the whole course of using

    本文提出了直槽雙圓弧齒輪滾刀刃形曲線方程式，並進一步分析了該滾刀的齒面特性，指出該滾刀從整個使用過程看，是一種近似造型的刀具。
  7. Abstract : this paper puts out the edge shapes curvilinear equations, of the edge shapes of double circular gear hob, and analyzes the tooth surface ' s characterist. it also points out that the gear hob is a kind of approximate shape building cutting too ls in the whole course of using

    文摘:本文提出了直槽雙圓弧齒輪滾刀刃形曲線方程式，並進一步分析了該滾刀的齒面特性，指出該滾刀從整個使用過程看，是一種近似造型的刀具。
  8. Abstract : a new waveguide which can change the wide wall of a rectangular waveguide into a symmetric arc wall is named as a cam - rectangular waveguide. comparing to sectoral waveguide, the new waveguide has the same voltage characteristics and is easier to be produced and fixed. an approximate formula of the dominant mode fields and the normalized conductance of a longitudinal resonant slot cut in the curved wall of a cam - rectangular waveguide are given. a resonant slot linear array in c & x band is designed, in which the slot voltage distribution is equiphase and the input is matched. the input voltage stationary ware ratio and the h - plane pattern of the antenna are measured. the experimental results show the conformance with theoretical results

    文摘:把常用的矩形波導一個寬面改成圓弧形構成的波導稱為圓突-矩形波導.這種波導與扇面波導相比：電性能相當；波導管結構更加簡單，容易加工，便於安裝.文中給出圓突-矩形波導中主模場，圓曲面上縱向槽歸一化諧振電導近似公式.設計了c和x波段波導曲面縱向諧振縫隙線陣，縫隙電壓相位為同相分佈，輸入端匹配.實際測量了天線輸入端電壓駐波比和h面方向圖，理論與實驗相吻合
  9. A new waveguide made of changing a wide wall of a rectangular waveguide to a uniform curved wall is called conformal waveguide. a kind of expression of approximate solution for domain mode of the new waveguide, including symmetric, unsymmetric arc, parabolic arch, hyperbolic arch, elliptic arch, etc., is constructed by using boundary condition of mental waveguide, variational method and boundary element method. by using the equivalence principle, an approximate calculating formula for equivalent resonant conductance of a narrow longitudinal halfwavelength slot cut in the curved wall of the unsymmetric arcrectangular waveguide is derived, and the result is shown. although this solution is approximate, it can solve the problem in designing the slotted antenna of such conformal waveguide

    把矩形波導一個寬面外突成均勻曲面構成的新波導統稱為共形波導.利用金屬波導邊界條件、變分法、邊界元素法構造這種新波導中主模場的一種近似解表達式，包括曲面橫截線為對稱、非對稱圓弧，拋物線弧，雙曲線弧，橢圓弧等.然後根據等效原理，推導非對稱圓弧矩形波導曲面上窄的縱向半波長縫隙的等效諧振電導的近似計算公式，給出計算曲線.這種解雖然是近似的，但卻能解決這類共形波導縫隙天線的工程設計
  10. For the stress analysis of dryers under the line load of supporting rollers, according to hoff theoretical solution of thin cylindrical shell under line loads, mangelsdorf approximate solution is modified on the basis of the calculation analysis for 14 sets dryers " dimension by computer programming with matlab software. the approximate formulas of the second largest hoop stress of the middle section of the shell are derived

    針對托輥線壓載荷作用下烘缸的受力分析，本文根據薄壁圓柱殼在線壓載荷作用下的hoff理論解，在運用matlab軟體對14組常用烘缸參數進行編程計算分析的基礎上，對mangelsdorf近似解作了修正，並由最小二乘法導出殼體中部截面環向應力次大值的近似計算式。
  11. The mcc is composite of meso -, meso - and meso - scale convective systems which have different structure and motion features. although circularly approximately on the satellite imagery, the mcc shows linear distributions of radar echo, torrential rain, thunderstorm, cumulonimbus and mesoscale physical parameters as a squall line

    它是中、和尺度對流系統組成的復合體，它在雲圖上近似圓形，其雷達回波、暴雨、雷暴、對流雲、中尺度物理量場等卻呈類似颮線的帶狀分佈。
  12. According to the geometrical characteristic of the arch dam shape, and based on the parameter design language of ansys software ( apdl ), the subp method and the stochastic search method are adopted together to optimize design of hyperbolic arch dam with variable thicknesses of the circle

    摘要根據拱壩體形的幾何特徵，基於ansys軟體的參數化設計語言（ apdl ） ，將零階近似方法和隨機搜索法結合起來對單圓心變厚度雙曲拱壩進行了優化設計。
  13. In the two - body case, the approximate equations of relative motion on elliptic orbits are derived

    在二體假設下，推導了橢圓軌道上相對運動方程的近似形式。
  14. The black-disk approximation used so far reproduces the coarse features, but not the finer details.

    應用至今的黑圓盤近似值雖然再現了概貌，但不能再現更為詳細的細節。
  15. We can obtain the eccentric circle ' s center, maximum drift diameter and effective drift diameter by using this method and the data of multi armed caliper log

    利用該方法和多臂井徑測井數據可得到變形截面上近似偏心圓的圓心、最大通徑和有效通經。
  16. The dissertation deals in details with the basic principle of direct torque control. according to the faults of traditional direct torque control and the requirement of an induction motor ' s control strategy change the method of regulating stator flux to make its path approximate to a circle as possible as could. to get quickly torque control, use a three - value regulator

    本論文介紹了電動機直接轉矩控制的基本原理，並根據傳統直接轉矩控制存在的缺點以及對電動機調速性能的要求，改變對定子磁鏈的調節方式，使定子磁鏈軌跡近似為一圓形，對轉矩採用三值調節器進行調節，以實現轉矩的快速調節。
  17. According to the faults of traditional direct torque control and the requirement of an induction motor ' s control strategy, the author changes the method of regulating stator flux to make its path approximate to a circle as possible as could and put forward a new way to use a three - value torque regulator

    本論文研究了異步電動機的數學模型，介紹了直接轉矩控制的基本原理，並根據傳統直接轉矩控制存在的缺點以及對電動機調速性能的要求，改變對定子磁鏈的調節方式，使定子磁鏈軌跡近似為一圓形。
  18. According to the new rules for a planet adopted at an international astronomical union meeting in prague, pluto doesn ' t make the grade for a planet : " a celestial body that is in orbit around the sun, has sufficient mass for its self - gravity to overcome rigid body forces so that it assumes a nearly round shape, and has cleared the neighborhood around its orbit. " pluto is automatically disqualified because its oblong orbit overlaps with neptune ' s

    根據在布拉格舉行的國際天文聯合會會議通過的行星新定義，冥王星達不到行星的級別，即：在繞太陽的軌道上運轉的天體，體積足夠大使其自身的重力可以克服其剛體力呈近似圓球狀，且能夠清除其軌道附近的其他天體。
  19. According to the virtual endoscopy automatic navigation, using the two - distance field - based 3d center path finding algorithm to find the path, adopting the cylindrical approximation of tubular organs to replace the center path by several approximate cylinders, while using distance transformation that is substituted by euclidean distance to calculate the approximate cylinder ' s axis and radius, the algorithm can save much time

    摘要針對虛擬內窺鏡自動漫遊技術，利用基於雙距離場的三維中心路徑提取演算法進行路徑提取，採用管狀器官的圓柱狀近似，將中心路徑用多個近似的圓柱體代替，用距離變換代替歐式距離公式計算近似圓柱體的軸和半徑，節省了大量的計算時間。
  20. In this dissertation, the author has accomplished the simulation of the dtc system and analyzed the corresponding results. the software of the digital control system, in which the digital signal processor ( dsp ) is used, has also been designed in the thesis. the direct torque control scheme is studied in the paper, and the simulation models of hexagon flux control system and approximate circle flux control system are presented based on the application of matlab / simulink

    本文對異步電機直接轉矩控制變頻調速方法進行了研究，採用mathworks軟體公司為matlab開發的系統模型圖形輸入和模擬工具simulink對直接轉矩控制的六邊形和近似圓形兩種定子磁鏈控制方法進行了模擬，實現了有速度傳感器的直接轉矩控制系統的構建，從理論上證明了這兩種方法的可行性。
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