等幅線 的英文怎麼說

中文拼音 [děngxiàn]
等幅線 英文
amplitude contour
  • : Ⅰ量詞1 (等級) class; grade; rank 2 (種; 類) kind; sort; type Ⅱ形容詞(程度或數量上相同) equa...
  • : Ⅰ名詞1. (布帛、呢絨等的寬度) width of cloth 2. (泛指寬度) width; size 3. (姓氏) a surname Ⅱ量詞(用於布帛、呢絨、圖畫等)
  • : 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...
  1. We acquired the system ' s dynamic response when the satellite attitude was adjusted and the mode of the antenna. then modal analysis and dynamic analysis have been done to the satellite - antenna system by using the finite element analysis ( fea ) software of ansys. through the analysis we got the system ' s connatural characteristic, the amplitude - frequency characteristic of harmonic response, the power spectrum density of random vibration response, the maximal amplitude and resuming time of impact response

    其次藉助ansys有限元分析軟體,對系統進行了模態分析和動力學響應分析,獲得了不同天結構參數下的衛星?天系統的固有特性,簡諧響應的頻特性,隨機振動響應的功率譜密度,以及沖擊響應的最大值和恢復時間
  2. 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傾角螺旋)槽形,可以大度改善燃燒室的冷卻性能.斜航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,可以生成多種母輪廓回轉體外表面上的斜航數控加工程序.燃燒室收斂-擴張段的母斜率變化大,加工難度大,是斜航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
  3. Using coordinate transformation method, the formula of imv on every point of image plane was deduced, and it included almost all motorial factors : the flight velocity of aircraft, roll, pitch, yaw, camera ' s scan and so on. thus, it is a precise formula, and it is also applied to frame cameras and push _ room cameras with array ccd

    利用坐標系變換的方法可推出像面上各點的像移速度公式,該公式包含了幾乎所有的運動因素:飛機的前向飛行、飛機的姿態角變化、相機自身的擺掃運動,是精確的像移速度公式。本公式同樣適用於畫式航空相機和陣ccd推掃型航空相機。
  4. Bright areas reveal undeflected or stationary nodal regions while contour lines trace out areas of constant vibrational amplitude.

    亮區表示未受偏轉的或穩定的波節區而輪廓則描繪出的區域。
  5. The system stores spatial data and characteristic data into central database, and provides services to users in server / client mode. as the research emphases of this thesis, several key sub - systems are designed and realized. the digital map input and maintenance subsystem performs format conversion, editing and updating of spatial data ; the rail - track video playing subsystem uses video recording as reference data, then plays, inquires and traces the corresponding frames in synchronous to the scaled mileage, realizing the query of the active picture frames ; the digital map query subsystem fulfills the map query, preview and spelling of digital map orthograph

    其中,地形圖輸入與維護實現了數字地圖的格式轉換、編輯處理以及空間數據的更新操作,解決了不同格式空間數據的互相轉換問題;路錄象播放將路錄像數據作為系統的一種索引數據,活動影像的畫面與里程相對應,實現了基於路錄像的播放、查詢和檢索的功能,實現了基於活動畫面的查詢檢索功能;數字地圖子系統完成了圖形查詢、數字地圖與路正射圖像瀏覽、圖拼接功能。
  6. First, it was taken that a discuss about the effects of geometry parameters of each piezocrystal on direction parameters ( main lobe width, side lobe amplitude, elimination of grating lobes ), amplitude of ultrasonic pressure, element viberation pattern, mutual radiation among elements, efficient test regions, ability to keep accurate and near - field distance and so on. based on the direction of ultrasonic field in ulpa deduced by ourselves. in addition, on the base of integrating all kinds of factors, it was put forward that the principle and method for optimized design of geometry parameters of piezocrystals in ulpa transducer, and its design programme and interface were compiled

    首先在推導超聲相控陣換能器聲場的指向性的基礎上,就各個晶片幾何參數對指向性指標(主瓣寬度、旁瓣度、消除柵瓣) 、聲壓值、陣元振動模式、陣元間互輻射、有效檢測區域、精確控制能力、近場長度方面的影響進行了論述,並在綜合各方面影響的基礎上,提出了晶片幾何參數優化設計的原則和方法,編寫了設計程序和界面。
  7. Based on the character of ultrasonic spectrum analysis, considering the affection of the circuit responsion of checking system, coupling state, position of checking transducer, this thesis established reasonable ultrasonic spectrum analysis method. using this method, several kinds of linear spectrum ( such as phase amplitude spectrum, phase power spectrum ) were researched and discussed

    本文根據超聲波頻譜分析的特點,綜合考慮了檢測電路響應、耦合狀況、探頭位置因素的影響,制定出了一套合理的超聲波頻譜分析方法,並用此方法對幾種性譜(如相位度譜、相位功率譜)進行了研究和探討。
  8. The elegant selections for this year include : very large array in moonlight, the satellite rescue mission of space shuttle, north america nebula in cygnus, hong kong from space, comet halley in easter island, eagle nebula in serpens, and the supernova 1987a

    選輯的十二珍貴天文圖片包括:月色下的甚大天陣太空梭拯救衛星任務天鵝座北美洲星雲太空中所見的香港復活節島上的哈雷彗星巨蛇座鷹狀星雲1987年所發現的超星
  9. First prize in the spot news singles category of the 2007 world press photo contest by nigerian photographer akintunde akinleye for reuters, showing a man rinsing his face after a gas pipeline explosion in lagos, nigeria

    路透社奈及利亞籍攝影師阿金圖德-阿金利伊參賽作品奈及利亞一男子在石油管發生爆炸后洗臉獲突發新聞類單獎。
  10. Therefore, in december 2000 the bureau of transportation of taipei city government completed a feasibility study for an lrt system in the taipei shin - yi district. this study recommended the adoption of an lrt system with a standard track gauge, power supply from overhead wires, two or three cars per train, a length of 90m for platforms, a certificate system for fare payment, consideration of the possibility of using electronic sensor ticketing systems, type b right - of - way for at grade sections, and signaling control for passing priority at the intersections. the study also proposed an initial lrt line of 9. 6 kilometers in length with 9 stations

    現代化輕軌運輸系統之運輸效能已較電車系統大提升,以一般採用b型路權為主,少部分a與c型路權之系統而言,每小時單向運能達到5 , 000至15 , 000人次,介乎高運量捷運與公車系統之間,適合擔負都會地區市郊與市中心區的聯絡路、市中心區集散路、鐵路與捷運系統接駁路、都市周邊環狀、特定區間(新市鎮)聯絡、都會區次要運輸走廊運輸主軸服務類型。
  11. Compared with the effect of mutual coupling to general antenna arrays, chebyshev - dolph antenna arrays, schelkunoff super - derective arrays and chebyshev - dolph super - derective

    比較了互耦對同相天陣、 chebyshev - dolph天陣、 schelkunoff陣和chebyshev - dolph超方向性陣天遠場方向圖的影響。
  12. Method for joining intersected contour lines intelligently

    拼接的智能化處理方法研究
  13. Considering the similitude law for shaking table test, we study the test results and obtain some conclusions which are a ) generally, the silty soil in test box liquefies and the liquefied time has relation with the amplitude of acceleration, b ) when the intensity is on and above eight degree, the silty soil deposit will be liquefied dramatically, c ) the relationship of the pore water pressure is relevant to the cycle loading which represents when the cycle loading ranges from little to great, the relationship is represent as a concave curve, or else as a protruding curve and tends to stability. ( 3 ) based on the triaxial compression test and the resonant column test, some studies are made such as a ) the duncan - chang parameters of constitutive model, b ) the dynamic shear modulus ratio and c ) the damping ratio of the site soil deposits. in order to deal with the test data, a computer program is compiled

    ( 2 )利用小型振動臺進行了k _ 0固結狀態下粉土的振動液化模擬研究,通過分析正弦荷載作用下的試驗資料,驗證了粉土的孔隙水壓力增長模式的合理性;從微分方程推導了基於土體振動臺模型試驗的相似律,並從模型實體、孔壓時程曲和相似律方面做出了分析,得出了如下結論:在小型振動臺試驗中,模型箱中的粉土都發生了液化,液化的時刻和輸入加速度值有關,而對頻率的變化不太敏感;粉土在相當於8 9度地震烈度的加速度值作用下可能產生嚴重的液化;孔壓的增長曲形狀與施加的荷載有關:當施加荷載為由小到大的形式時,曲形狀為上凹的曲;當施加荷載為的正弦荷載或荷載值由大到小時,曲形狀為上凸的曲,且逐漸趨于穩定。
  14. The tide and the tidal current in luoyuan bay can be known from the numerica model calculation

    給出了同潮時、潮流橢圓、最大潮流及不同時刻潮流場分佈。
  15. Solution of nonlinear wave loads in regular oblique seas. based on strip method, thinking about nonlinear factors such as no straight shipboard on waterline, the instantaneous variation of wet surface shape and slamming effect of ship bottom, the numerical methods of nonlinear fluid force in large amplitude oblique regular seas are discussed

    關于斜浪規則波中非性波浪載荷的計算:本文基於切片理論,考慮到船體非直舷、水下剖面形狀的瞬時變化以及砰擊性因素,討論了大波斜浪規則波中非性流體力的時域計算方法。
  16. Note : the inaugural ceremony of the chinese amphibious rescue association and its amphibious rescue drills received extensive coverage in the three major formosan newspapers. in addition, formosa s four terrestrial television networks - taiwan television, china television, chinese television, and formosa television, as well as cable tv networks such as tvbs - n, sanlih television, and great love television, reported on the event in their evening news broadcasts

    注:中華兩棲救援協會的成軍儀式暨水陸兩棲救援實況演習,除了福爾摩沙三大報系大的平面報導之外,國內四家無電視臺臺視中視華視民視,以及tvbs - n三立與大愛電視臺,均在當晚新聞時段,重點播報此活動。
  17. Meanwhile, in 3d - scene, some functions of spatial analysis and interactive operations have been realized. and, a testing application system of 3dcm is developed, which includes tin model construction, the creation of contour, spatial coordinate query, section - cutting, measuring distance and area, 3d visualization and operation about topography and building etc. the purpose of developing testing system is to demonstrate the correctness of 3dcm based on the visualization. finally, the result of the testing and 3dgis research direction is put forward to investigate generally

    另外,在三維模型的可視化場景中,實現了一些3dgis的交互操作和空間分析功能,結合論文的目標,開發了一個實驗系統,對三維城市的建模方法進行了論證,實現了dem模型的快速構建及的追蹤和地圖分,實現了三維城市模型的可視化,在可視化的基礎上實現了部分空間交互操作和空間分析,如:空間坐標查詢、斷面切割、距離和面積量算、建築物屬性查詢、三維動態漫遊
  18. In first part of the thesis, by a review of the research on aircraft sonic fatigue, the formulas for calculating natural frequencies of the typical aircraft skin - panel structure with four edges simply - supported or four edges fixed - supported were drawn, the response of displacement and stress was analysed under the condition of random white noise loading with the steady - state or unsteady - state. the procedure how to use data of s - n curve under constant loading for predicating the fatigue life of skin - panel subjected to random loading was shown

    通過對聲疲勞問題研究的回顧,根據典型飛機蒙皮壁板模型,整理了四邊固支,四邊簡支兩種邊界條件下多階模態固有頻率,非平穩及平穩隨機白噪聲載荷下的位移和應力響應,以及如何從s ? n曲求得隨機載荷應力下的疲勞壽命。
  19. It includes the following aspects : adopting the partial differential equations and neighborhood average smoothing methods to reduce image noises. mapping the rgb three - color and gray scale histogram to study - 3 - the relationship of flame features and temperature field distribution. the methods of calculate important parameters about the average gray value, the flame area and the flame shape center coordinate are given

    採用圖象相加、偏微分、鄰域平均方法來消除圖象噪聲;繪制圖象的r 、 g 、 b三色直方圖來研究火焰度特徵分佈與溫度分佈的關系;給出計算平均灰度、火焰面積大小、火焰形心坐標重要參數的方法;用彩色溫區或重構溫度場分佈。
  20. In a first approximation, the departure from a constant amplitude vs frequency characteristic will be a characteristics with a linear slop that will vary with time

    採用一級近似,則可認為對頻率特性曲偏移是一具有時變性斜率的特性曲
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