水下航速 的英文怎麼說

中文拼音 [shuǐxiàhángsù]
水下航速 英文
submerged speed
  • 水 : 名詞1 （由兩個氫原子和一個氧原子結合而成的液體） water 2 （河流） river 3 （指江、河、湖、海、洋...
  • 下 : 下動詞1. （用在動詞后,表示由高處到低處） 2. （用在動詞后, 表示有空間, 能容納） 3. （用在動詞后, 表示動作的完成或結果）
  • 航 : Ⅰ名詞（船） boat; shipⅡ動詞（航行） navigate （by water or air）; sail
  • 速 : Ⅰ形容詞（迅速; 快） fast; rapid; quick; speedy Ⅱ名詞1 （速度） speed; velocity 2 （姓氏） a surna...
  • 航速 : speed of a ship or plane; navigational speed
  1. In 1990 ' s, the growing speed of passenger transport has surpassed that of cargo transport and become the trend of traffic industry development in the new period. there is an obvious digressive trend of waterway passenger transport volume and turnover volume because of the fierce competition between railway, road and aviation, and relative falling behind of waterway technology

    進入90年代之後，旅客運輸增長速度超過了貨物運輸，成為交通運輸業在新時期的發展趨勢，鐵路、公路和航空的激烈競爭，加之水路客運技術狀況的相對落後，使水路客運量和旅客周轉量都出現明顯下降的態勢，水路客運面臨新的機遇和挑戰。
  2. In this dissertation, through computer simulation, the problems of modeling, control and guidance of auvs are presented. the first part of this dissertation addresses the problem of dynamically modeling of auvs, and derives thrusters " two - dimension nonlinear dynamic model, which has axial flow speed and propeller rotational velocity as two state variables, voltage or current of motor as inputs, and thruster force and torque as output. the second part focuses on the nonlinear adaptive sliding mode control of auvs in diving plane and steering plane

    本論文系統研究了自主式水下航行器的建模、非線性自適應滑模控制、以及深度調整和水平面導引方法等問題，具體成果和創新點如下1 、根據流體力學理論，建立了螺旋槳推進器的動態模型，它以螺旋槳來流速度v _ p和螺旋槳轉速n為狀態變量，以電機施加轉矩為輸入，螺旋槳推力t和轉矩q為輸出。
  3. The method of wing shape optimization of space shutlle has been developed with penalty function approach in which the objective function is the mass of the wing and the constraints are the hypersonic re - entry flight cross range, lift / drag ratio, and subsonic flight lift / drag ratio, the margin of the longitudial static stability and the magnitude of the horizontal landing speed etc

    摘要介紹了在滿足高超音速再入橫向機動航程，高超音速再入飛行時的升阻比，亞音速進場飛行時的升阻比，縱向靜穩定性裕度和水平著陸速度等飛行性能設計要求下，用罰函數法尋求使航天飛機機翼質量為最小的外形優化方法並給出了算例。
  4. Another based mathematics model about the anchor cable is used for ship - anchor system. the numerical calculation have been worked by programmed in the matlab language. at the same time the influence that the dragging speed of antisubmarine helicopter and the height over the surface of ocean acts on the shape and the tension of underwater cable, and that the current velocity and the diameter of anchor cable acts on the shape and the tension of anchor cable, has been calculated

    把建立的水下拖索數學模型和錨索數學模型分別應用於航空吊放聲納探頭?纜繩動力學系統和船?錨系統，採用matlab語言編程進行了數值計算，同時分別計算和分析了反潛直升機拖速、距海面高度對拖索形狀和張力的影響以及海流速度、錨索直徑對錨索形狀和張力的影響。
  5. This paper attentatively studies the theory of traveling bubble cavitation noise emitted from high - speed underwater self - navigator of schiebe body

    本文針對回轉體形水下高速自主航行器產生的流動泡類型的空化所輻射的噪聲理論進行了探索性的研究。
  6. This subject belongs to three - dimensional layout problems with behavioral constraints theoretically and concerns the knowledge of spacecraft design, mechanical engineering, computer science, mathematics, mechanics and system engineering. so it can be ascribed as the frontier fundamental and applied research of cross - discipline subject with np complexity theoretically. in term of engineering practice, this subject has extensive applications, such as layout design of spacecraft module, engineering machinery, submarine and shipping, tank, under - water suspension engineering, platform of marine drilling well, bullet train, multiple spindle box of machine tool, robot

    該課題在理論上，屬帶性能約束的三維布局問題，涉及航天器設計、機械工程、計算機、數學、力學和系統工程等學科，為交叉學科前沿課題的基礎理論和應用基礎研究，具有np難度；在實踐上，具有廣泛的工程應用背景，如航天器艙、工程機械、潛艇、船舶、坦克、水下懸浮工程、海上鉆井平臺、高速列車、組合機床多軸箱、機器人等的布局方案設計問題。
  7. The thesis analyse the error and the feasibility of the system. because the precision of position and direction is related with the precision of the heading and the distance, the thesis discuss the method of obtaining the distance using milemeter, water milemeten engine ' s rotate speed and accelerometer, and the method of obtaining the heading using the combination of the gyrocompass and the digital compass. then the thesis introduce the details of the system realization, include the hardware and the software

    由於航位推算的精度與航程和航向的精度直接相關，因此，論文討論了用里程計、水速表、引擎轉速或加速度計等獲取里程的方法，用航向保持器和數字磁羅盤組合的方法獲取航向角的方法（初始尋北由數字磁羅盤來完成） ，這為採用數據融合方法提高航程和航向精度打下了基礎。
  8. Based on the riverbed evolution analyses of the downstream reach of oujiang estuary and physical model test of eight types of regulation projects, an estimation method for nondeposit velocity satisfying channel depth is presented under fixed bed model test condition

    摘要通過對甌江口外段河床演變分析，以及8種航道治理工程的物理模型試驗，提出了在定床試驗條件下滿足航道水深所需的不淤流速的估算方法。
  9. Under this trend, manipulating vessels becomes difficult more and more, particularly under the conditions of ship ' s entering or leaving the port > drawing alongside or leaving the wharf or mooring or leaving the buoy. because of the poor effect of the rudder as a result of the low vessels " speed and very limited space for operating, the operator ca n ' t manipulate freely the vessels and avoid the collisions with other vessels or obstacles only by their own power

    在這種趨勢下，對船舶進行操縱變的越來越困難，尤其是在進出港、靠離碼頭、狹水道航行、系離浮筒等船速較小而舵效較差、操縱餘地又極為有限的情況下，僅僅依靠船舶自身的動力性能對其進行操縱，並要與他船或障礙進行有效的相互避讓，更是如此。
  10. In this part, the first work is pretreatment of a numerical model, including creating calculating grids automatically, improvement of the linear boundary technique and so on. the second work is to estimate the siltation of a basin or channel by liu ' s equation. the third work is to build an edbms ( engineering data base management system ) for the result of mathematical model

    其中主要的工作是：其中主要的工作一是數學模型的前處理，計算網格自動生成，線邊界法的優化；二是應用劉家駒公式在長江口深水航道治理工程地理信息系統的支持下實現港池、航槽開挖的實時回淤估算；三是將計算成果形成gis管理和支持下的工程數據庫系統（ engineeringdatabasemanagementsystem ） ，同時嘗試解決時間序列數據如地形沖淤變化，潮位、流速過程的分析、查詢和顯示問題，並實現實時、互動的動態演示及三維可視化。
  11. The anti - rolling tank is one of the widely used stabilizers in the world, and it fits for ships working at zero speed or low speed, whose characters are simple structure, low cost and easy to maintain

    減搖水艙是世界上成功應用的減搖裝置之一，它具有結構簡單、價格低廉、易於維修等特點，在零航速或低航速情況下能正常工作。
  12. ( 3 ) in excavation channel, the velocity in engineering area may be reduced, but the velocity in other areas of this channel may be increased and the flow condition may be deteriorated as a result of the increase of flow rate in this channel. thus, it should be discussed and studied before engineering practice

    （ 3 ）在汊道的開挖中，工程區域的局部流速可能有所下降，但因分流比有所增加，可能導致其餘部分河段的流速有所增加，惡化航行水流條件，因此在工程前需要進行充分的論證和深入的研究。
  13. Abstract : variations of flow pattern, flow velocity in deep poo l and side bar, mainstream thread, and water surface, caused by excavation project, are investigated by two - dimensional mathematical model in an orthogonal curvili near coordinate system. the change of bed - load transport rate, and redeposition r ate are predicted. the influences of the excavation project on navigation are ana lyzed. grid - type and flat - type excavation alternatives are proposed and discuss ed

    文摘:採用正交曲線坐標系下的河道平面二維數學模型，研究了嘉陵江何家磧邊灘采砂后河道流勢、流態、灘槽流速、主流位置、水面高程及比降的變化規律，預測了采砂方案完成後卵石推移質輸沙率變化及其對航道的影響，並對格形開挖和平整開挖方案進行了比較分析
  14. The connection of the velocity and self - - noise intensity is studied. then the spectral ana1ysis in the burg method and results is given out in high and 1ower ve l oc i ty

    採集到的數據進行了航速和自噪聲強度關系分析，採用burg法對自噪聲進行了譜分析，最終得到了該水下航行體高速和低速兩種狀態下自噪聲特性的分析結果。
  15. At the same time, figures involving attribute data about flow field at inlet and outlet downstream or wave motion of water at the downflow head of lock chamber of siyang navigation lock were displayed through gis application system which we developed. according to data of baoying navigation lock acquired by mathematics model, figures about velocities which have the same value, velocities toward cross direction which have the same value and flow field at inlet and outlet upstream were formed. achievement data, space information and attribute information were in connection with figure so as to search for and analysis the information, which is satisfying

    同時完成了江蘇泗陽船閘下游引航道非恆定流及其改善措施的計算分析研究和寶應船閘上游引航道口門區水流條件計算分析研究，運用gis技術和所設計的gis應用系統對泗陽船閘下游引航道內流場以及下閘首水位波動情況進行信息顯示，根據對寶應船閘的計算結果生成上游引航道口門區等流速圖、橫向流速等值線圖和流場圖，使計算分析成果數據、空間信息、屬性信息與圖形顯示有機結合，便於查詢分析，效果令人滿意。
  16. Finally, in orthogonal curvilinear coordinate systems numerical model is established and applied in the yangtze river estuary in which some regulation plans are taken include submerged jets and groins. verifications are also done to verify water level and velocity. flow fields are computed for the analysis of effect of regulation engineering on the whole water area

    最後，應用正交曲線網格技術，建立了正交曲線坐標系下廣義淺水方程的計算模式，將之應用於長江口深水航道整治工程的流場計算，進行實測水位、流速驗證和流場模擬。
  17. However, the use of this technique has been very limited in the sonar environment mainly because of difficulties of maintaining a stable track under water and problems of under - sampling of the aperture arising from the relatively slow velocity of acoustic waves in water

    但是直接將窄帶合成孔徑雷達技術應用於水下聲納卻遇到了困難。困難主要來自以下三個方面：首先，聲速很低，這使得聲納必須航行的相當慢，以保證對聲孔徑進行足夠的采樣。
  18. The study has obtained the following conclusion : the increase of tonnage or the decrease of water depth will lead to an obvious decrease of the maximum velocity, while the increase of the tugboat power causes an unconspicuous increase of the maximum velocity

    通過本論題的研究，得出以下結論：船舶排水量的增加，水深變淺，極限航速都將減小，且這種減小的趨勢較為明顯；增加拖輪功率，極限航速將增大，但增大的趨勢並不十分明顯。
  19. Finally, these departments ca n ' t establish the information system and logistic system which can quick respond to the customers relate to cost. quality deliverable our country economy system is changing, it is changing from socialism planning economy to market economy. it is very important for us to research the supply chain management, we can learn from the foreign country " s enterprise practice. our goal of use of scm is controlling inventory, improving supply quality and strengthening the competitive capability

    我國航空企業特別是材料采購在傳統計劃體制與運作模式下，多數是自成一個封閉系統，不重視對供應鏈的管理；製造商、供應商和經銷商缺乏長期合作的戰略夥伴關系，相互之間缺乏以信任和共同獲利為基礎的價值鏈，沒有形成滿足顧客在成本、質量、交貨時間等方面的要求而反映敏捷的物流和信息流。我國正在由計劃經濟體制向市場經濟體制轉變，研究國外近來發展迅速的供應鏈管理理論與方法並應用於gj航空公司的實際，對控制庫存、提高服務水平、增強市場競爭能力，有重要的現實意義。
分享友人
分享到 Line

分享到臉書