船首方向 的英文怎麼說

中文拼音 [chuánshǒufāngxiàng]
船首方向 英文
heading
  • 船 : 名詞1. （水上的運輸工具, 船舶的通稱） boat; ship; vessels 2. （姓氏） a surname
  • 首 : Ⅰ名詞1 （頭） head 2 （首領） leader; head; chief 3 （表示方位） aspect 4 （姓氏） a surname Ⅱ動...
  • 方 : Ⅰ名詞1 （方形; 方體） square 2 [數學] （乘方） involution; power 3 （方向） direction 4 （方面） ...
  • 船首 : stem; bow; backbone; prow; forebridge; bow tie
  • 方向 : direction; orientation
  1. The first day cover sets the scene of zheng he s fleet under full sail in rough seas with seagulls in flight, representative of the determination and enterprising spirit of these formidable explorations, against a backdrop of fine silk that symbolises success in foreign trade

    首日封繪畫滾滾波濤中高張雲帆的船隊。前方的海鷗翱翔展翅，隱喻船隊不畏險阻、奮勇向前的精神；背景則以精美的絲綢襯托，象徵通商貿易的美滿成果。
  2. In the full of research, the thesis constructed the dynamic equations of the simplified model, then programmed and computed the feedback gains using lqr method. moreover, the thesis plotted pictures of displacement, velocity, acceleration, bend and shearing force of ship ' s head and middle part in the condition of using cable and not using cable

    在研究工作中，首先對船舶的簡化模型建立了動力學方程，然後採用線性二次型最優控制方法，編寫程序並計算出船體垂向振動固有頻率和最優反饋矩陣，得到控制前後船艏以及船舯部的位移、速度、加速度、彎矩和剪力歷程圖。
  3. There are many sorts of the modern dredgers, to adapt the various working regions, and soil conditions etc. it is inevitable to select to build the large self - propelled trailing suction hopper dredgers for shanghai channel bureau, because of the developments of the big - scale ports and channels at home and abroad, and the bad working conditions offshore, and the business direction

    現代挖泥船有各種類型，它們適用於不同的施工區域與土質等工況條件。世界與國內港口航道的發展愈來愈體現出規模大，向外海推進和施工條件惡劣的特徵，從上海航道局的企業經營定位出發，建造大型自航耙吸挖泥船是首選方案。
  4. In this paper, an approach of the systematic artificial neutral net was introduced into the analysis on the ship - against - bridges probability with a computer programs. based on the basic data of the present 12 typical bridges as the sample, 4 chief influential factors as the input coefficient, such as the bridge span, the water flow rate, the incline angle between water flow direction and the direction normal to bridge axis, and the curve in the course near the bridge area, with the ship - against - bridge probability as the output coefficient, the intelligent judging system of the ship - against - bridges probability reflecting the influence of the above input parameters is obtained after training

    本文首次將人工神經網路系統方法引入了船撞橋概率的研究當中，編制了計算程序，成功地以現有12座典型橋梁的基礎數據為樣本，以橋梁跨徑、水流流速、水流方向與橋軸法線的夾角以及橋區航道彎曲度等4個船撞橋主要影響因素為輸入參數，以船撞橋概率為輸出參數，經訓練得到了能較好地反映上述輸入參數影響的船撞橋概率判斷系統。
  5. In ship steering controller design, the nonlinear ship model should be written in siso strict feedback form. we start the recursive design with the system first state variable and continue with the second one. by introducing a change of coordinates, we choose lyapunov functions to stabilize the system and obtain the control law

    在船舶航向控制方面，考慮船舶的穩態回轉非線性，應用backstepping方法設計：首先把系統化成單入單出的嚴格反饋控制形式（呈下三角結構） ，假設系統后一個狀態變量是前一個狀態變量的虛擬控制，通過適當的變量代換，在每一步構造李亞普諾夫函數，使前一子系統在虛擬控制下漸近穩定，逐步遞推出控制器控制規律，使整個系統在平衡點滿足一致漸近穩定性。
  6. In general, the upward amplitude curve " curvature is larger, and it changes quicker. on the contrary, the downward is smaller and slower ; because the flare force contains the square of the wave elevation velocity, it results in an difference between the flare force frequence and the associated moving frequence ; the flare force decreases the downward amplitude of heaving oscillations ; the speed of ship has an ignorant effect on the peak values of three calculated values, but there is an obvious effect on the oscillating frequence ; the wave amplitude has an effect on the ship motion, and there is an linear relation between the oscillating amplitude and the wave amplitude on the whole. by the way, there are some experiences and lessons according to the progress calculation : before the calculation of the ship motion, we should checkout the balance in a calm water firstly, namely, the whole displace of ship and the longitudinal position of the center of gravity must be consistent with the draft in calm water, or else, the calculation may show the " floating " phenomenon ; the mixed language programming has a lot of virtues, but it exists a fatal limitation - the debug of dll

    研究表明：在某些頻率范圍內相關水動力系數基本不隨吃水變化，只有超過某一頻率后水動力系數的值才會出現差異；在橫搖方向，水動力系數並沒有隨著吃水的變化發生規則變化，而是出現了波動現象；近船首剖面的水動力系數計算表明，水動力系數的波動非常大，並遠遠偏離了平均位置的水動力系數值，值的變化速率也不盡相同，總的看來，上振幅曲線曲率較大，變化較快，下振幅曲線曲率較小，變化較慢；外飄力和波面運動的速度的平方項有關，導致其振動頻率和相應運動方向的頻率不同；外飄力使升沉向下運動的幅值減小；船速對三個計算量的峰值影響甚微，但對振動頻率有明顯影響；波幅對船舶運動的影響是明顯的，船舶運動的幅值基本上和波幅成線性關系。
  7. Considering the shortcomings in the genetic algorithms, some improvements are proposed in order to elucidate its strong optimizing ability, genetic algorithms are used to optimize the pid parameters of ship autopilot. the comparison between the different simulation curves shows the validity of genetic algorithms in looking for the best parameters

    本文首先用遺傳演算法來對船舶航向保持自動舵的pid控制參數進行在線優化，通過對用常規工程方法整定的pid控制和用遺傳演算法優化的pid控制的模擬曲線的比較，說明了遺傳演算法強的全局尋優能力。
  8. We can n ' t get result on how to change course and speed to make collision avoidance, this can help little on collision avoidance decision. the article aims at the default on radar simulator and implements the standard result on radar simulator by making use of mcu. the main production is below : first, we calculate how to chang course and speed on the destine point by mcu. we get the new course and new speed on the destine point, we get the point to resume original course and speed, we get the distance and azimuth to resume original course and speed on given course and speed, the six essential : dcpa, tcpa, distance, azimuth, real speed and real course

    本論文針對當前雷達模擬器標繪訓練中的不足，實現了利用單片機進行雷達模擬器標繪標準值的計算，主要成果有以下方面：首先，利用單片機計算得到了在預定點改變航向和改變航速的計算，求得預定點改向的新航向c _ n和預定點變速的新速度v _ n ，恢復原航向和原航速的時機點的計算；在給定避碰的新航向、航速的條件下，計算出恢復原航向航速的時機點h的距離r _ h和方位_ h ；目標船的六要素，即dcpa 、 tcpa 、距離r （ t ） 、方位（ t ） 、真航速v _ t和真航向c _ t 。
  9. For displaying the initial date aquired from sea chart correctly in three different display modes ( relative head up motion, relative north up motion, true north up motion ), a series of coordinate conversion are necessary. in the second chapter, data structure and various coordinates conversion are discussed in details

    要使從海圖錄入的原始數據能夠在3種不同的顯示方式（船首向上的相對運動顯示方式、北向上的相對運動顯示方式和北向上真運動顯示方式）下正確的顯示出來，必然要在幾個坐標系（圖板坐標系、屏幕坐標系、平面直角坐標系和地理坐標系）中進行一系列的坐標變換。
  10. Another 20 kinds of non - designed contact points are given for the first time. contact determining algorithm of all the above contact types is given using z - buffer algorithm for 3 - d observation, and simulation results show high accordance with results of vector - associated method. simulation for non - designed contact mode with random initial conditions has been done too, and statistics from the simulation indicates that it is important to predict non - designed contact points in practical rvd efforts

    全文的工作包括以下幾個方面的內容: 1 .建立了周邊式對接機構的復雜幾何外形的數學描述，描述了對接初始條件范圍內，兩對接機構相互接近、捕獲過程中可能出現的20種設計接觸模式，並針對初始接觸點首次提出20種非設計接觸模式;利用計算機圖形學中可見面判別的z -緩沖演算法原理，給出了所有接觸模式的檢測演算法，該演算法的模擬結果與輔助向量法高度一致，驗證了演算法的有效性;進行了300組確定首次接觸點的隨機模擬，統計結果表明，在飛船上實時進行非設計接觸模式的預測是非常重要的。
  11. Firstly, roll - on roll - off ships are introduced in detail. then this thesis analyzes the actuality of roll - on roll - off fleets in the world, and introduces international well - known shipping companies that engage in roll - on roll - off transportation of automobile, including their fleets, market share, operating status and development in the future

    本文首先對汽車滾裝船作了詳細的介紹，而後對世界滾裝運輸船隊的現狀作了簡要的分析，並對國際知名的幾大汽車滾裝運輸船公司的運力、市場份額、經營現狀以及未來發展方向作了具體的介紹。
  12. The crews raced for the beach ; but the boat i was in, having some start, and being at once the lighter and the better manned, shot far ahead of her consort, and the bow had struck among the shoreside trees, and i had caught a branch at swung myself out, and plunged into the nearest thicket, while silver and the rest were still a hundred yards behind

    水手們競先向岸劃去，但是我乘的劃子，由於起劃略早，舟身較輕，配備的槳手好一些，遠遠地劃在它的同伴的前頭，船首一頭插在岸上的樹叢里，於是我一把拽住根枝條，蕩了出去，接著便鉆進了最近的灌木叢，這時西爾弗和其餘的人還在身後一百碼的地方哩。
  13. In addition, based on the expert system theory, and the ship intelligent collision avoidance expert system, the frame of multi - ship collision avoidance expert simulation system is built. finally, at the foundation visual basic 6. 0 combined with matlab 6. 0, a software of multi - ship collision avoidance expert simulation system is designed. it should be noted that this software can give out the project, the opportune moment, the extent of veer and the reversion of course, complete the auto - simulation of multi - ship collision avoidance

    在系統的研究過程中，首先對船舶避碰領域知識進行分析；然後用層次分析法實現了多船會遇避碰決策，並且在碰撞危險度的基礎上實現了行動時機、避碰方案與轉向幅度的計算；接著根據專家系統理論，在船舶智能避碰專家系統的基礎上構建了多船會遇的避碰專家系統的框架；最後，以visualbasic6 . 0作為軟體開發平臺，並結合matlab6 . 0軟體，設計了一種具有良好可視化人機界面的多船會遇避碰模擬專家系統軟體。
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