計算天體力學 的英文怎麼說

中文拼音 [jìsuàntiāntǐlìxué]
計算天體力學 英文
computational celestial mechanics
  • 計 : Ⅰ動詞1 （計算） count; compute; calculate; number 2 （設想; 打算） plan; plot Ⅱ名詞1 （測量或計算...
  • 算 : Ⅰ動詞1 （計算數目） calculate; reckon; compute; figure 2 （計算進去） include; count 3 （謀劃;計...
  • 體 : 體構詞成分。
  • 力 : Ⅰ名1 （力量; 能力） power; strength; ability; capacity 2 [物理學] （改變物體運動狀態的作用） forc...
  • 學 : Ⅰ動詞1 （學習） study; learn 2 （模仿） imitate; mimic Ⅱ名詞1 （學問） learning; knowledge 2 （學...
  • 計算 : 1 （求得未知數） count; compute; calculate; reckon; enumerate 2 （考慮; 籌劃） consideration; pla...
  1. Celestial mechanics enables astronomers to calculate the positions of the planets at any time in the post or future and to predict the movements of comets.

    天體力學使文學家能計算出行星在過去或將來任何時候的位置，並能預報彗星的運行位置。
  2. In order to calculate the orbit of the satellite, we established satellite movement model based on celestial mechanics and spaceflight dynamics

    為滿足衛星軌道遞推計算需要，根據天體力學、航天動力學理論，建立起二體條件下的衛星軌道動力學模型。
  3. In this paper, starting from the basic law of fluid me chanics, a mathematical model equation for describing the tran sient flow of the wet gas in the pipeline under peak shaving op eration is established, a simplified treatment for the model equa tion is made and a train of thought for concrete calculation is de signed

    文章從流體力學的基本規律出發，建立了描述濕天然氣管道輸送調峰工況下瞬變流的數學模型方程，並對模型方程作了簡化處理，設計了具體的計算思路。
  4. The asteroids are the most important small bodies in the solarsystem, and they mainly lies in the two locations - a main belt between the mars ' s orbit and the jupiter ' s and the near - earth space. the most feature of the orbits of near - earth asteroids ( neas ) is that the semi - major axes of the orbits are nearly equal to that of the earth or the perihelia distances are approximate to or even less than the mean distance between the sun and the earth, thus they could move into inside of the earth ' s orbit, so that they might close approach or even colliside with the earth ( or other planets, such as the venus, the mars, etc. ). the characteristic brings about some difficulties in the numerical research during their orbital evolution, which leads to the failure of the normalization technique in the general removal impact singularities of celestial mechanics methods and the symplectic algorithm which is successfully applied to the investigation in quality. by comparing the computation effects of several common numerical methods ( including symplectic algorithm ), and considering the nature of the movement of the small bodies, the corresponding treatments are provided here to improve the reliability of the computation

    小行星是太陽系最重要的一類小天體，主要分佈在兩個區域；火星和木星軌道之間的一條主帶和近地空間.近地小行星軌道的最大特點是其軌道半長徑與地球軌道半長徑相近，或近日距離接近甚至小於日地平均距離，其運動可深入到地球軌道的內部，這將導致該類小行星與地球（還有金星、火星等）十分靠近甚至發生碰撞.這一特徵給其軌道演化數值研究帶來一些困難，包括天體力學方法中一般消除碰撞奇點的正規化處理以及對定性研究十分成功的辛演算法都將在不同程度上失效.通過對幾種常用數值方法（包括辛演算法）計算效果的比較，根據小天體運動自身的特性，給出了相應處理措施，從而可提高計算結果的可靠性
  5. This paper, in the light of the special geological environment and actual project situation of the three gorges reservoir area, puts forward a comprehensive analysis and evaluation system suitable for the stability analysis of the bank landslide of the three gorges reservoir area under the premise of thorough consideration of the water influence on the stability of the bank landslide, and obtains the following achievements in several aspects that have the practical application significance and certain scientific research value : ( 1 ) it is discovered that the water activity is the primary factor of the formation of the new landslide and the revival of the ancient landslide. on the one hand, the rising underwater level reduces the actual stress of landslide ; on the other hand, the long time soaking of the underwater reduces the mechanics intensity of the landslide and the slide belt, both of which reduce directly the landslide stability ; ( 2 ) in view of the special condition of the three gorges reservoir area, this paper analyzes systematically the forces acted on the landslide of the three gorges reservoir area and the force varieties acted on the divided landslide when the water level changes between 175 meters and 145 meters. thus it is more scientific and comprehensive for the analysis of the forces acted on the landslide ; ( 3 ) this paper summaries systematically 10 kinds of typical computation projects by organic combinations of different kinds of situations in the dry season ( nature statue ), rainy season ( rainstorm or rains for a long time condition ), with 175m water level in the reservoir, during the earthquake, with the water level of the reservoir adjusted from 175m to 145m and so on, and produces

    本文針對長江三峽庫區特殊的地質環境與工程實際情況，在充分考慮水對庫岸滑體穩定性影響的前提下，提出了一個適用於長江三峽庫岸滑坡體穩定性分析的綜合分析評價體系，並取得了如下幾個方面具有工程實際意義和一定科學研究價值的研究成果： （ 1 ）研究結果發現，水的活動是新滑坡形成或古滑坡復活的主要因素，一方面是由於地下水位升高降低了滑坡體的有效應力，另一方面是由於地下水的長期浸泡降低滑體及滑帶的力學強度，這兩方面的因素均將直接降低滑坡的穩定性； （ 2 ）針對三峽庫區的特殊條件，系統分析了作用於三峽庫區滑坡體上的力系和庫水位在175m與145m間變化時滑體條塊的受力變化，從而使對作用於滑坡體上的力系分析更科學、更全面； （ 3 ）通過對滑體處于旱季（天然狀態） 、雨季（暴雨或長期降雨狀態） 、 175m庫水位、地震以及庫水位由175m調節下降至145m等各種不同情況的有機組合，本文系統地歸納總結出了10種典型計算工況，並具體給出了相應的作用荷載的計算方法，使在庫區岸坡滑體穩定性分析評價時對計算工況選擇及其作用荷載的計算更具規范性； （ 4 ）具體運用c + + builder開發了關于滑坡體穩定性綜合分析評價系統，使對滑坡體穩定性分析計算更方便、更準確； （ 5 ）將上述滑坡體穩定性綜合分析評價系統應用於重慶市豐都縣名山滑坡穩定性分析的具體事例中，分析結果表明，本文所提出滑坡體穩定性綜合分析評價方法對三峽庫區的滑坡穩定性分析是實用可行的。
  6. By means of the orbit dynamics theory and other knowledge, author established mathematical model related to collision forecast, including space object orbit confirming model, space objects relative movement model, dangerous object distinguishing model and space object collision geometry relation model, etc. according to the mathematic model, author calculated the relative distance transformation rule along with time between the spacecraft and dangerous debris and established early warning rule

    依據航天動力學理論和其他知識，建立了碰撞預警相關的數學模型，包括空間目標軌道確定數學模型、空間物體相對運動數學模型、危險物體判定準則數學模型和空間物體碰撞幾何關系數學模型等，根據數學模型計算航天器和危險目標的相對距離隨時間變化規律，設定了預警規則。
  7. The high - performance solution of sparse linear algebra equations is very important in solving many problems from science and engineering applications, including computational fluid, simulation and design of materials, data processing in oil exploitation and earthquake prediction, numerical forecast of weather, and numerical simulation of nuclear blast

    稀疏線性代數方程組的高效求解是許多科學與工程計算的核心，如計算流體力學、材料模擬與設計、石油地震數據處理、數值天氣預報從核爆數值模擬等都離不開稀疏線性代數方程組的求解。
  8. The algorithm of strapdown inertial navigation system is also discussed and then use the flight - track generator to give a simulation, since a closed loop feedback integrated navigation system is designed in this paper, and the output of the filter must feed back to the strapdown inertial navigation system, the analysis of the algorithm in strapdown inertial navigation system is important. the scheme to design the trajectory of gps and the simulation of gps constellation are then studied, the simulation of gps constellation is given from the calculation of vernal equinox base on the principle of celestial mechanics, this method of different from other methods given by other paper and is useful to the research of satellite navigation system. a new method to abstract noise modal in integrated navigation system is proved to be useful in practice, this method, which is given by use the principles of stochastic processes, statistics, time series analysis, and system identification, is suitable for the kalman filter in integrated navigation system

    如航跡產生器的設計，該航跡產生器是研究組合導航問題的前提，從國外一些研究組合導航系統的文獻中可以看出，設計這樣一個航跡產生器是非常必要的，所以本文自行設計了這樣一個系統；還討論了捷聯慣性導航系統中捷聯解算的方法，並進行了模擬研究，由於在本文設計的閉環反饋式組合導航系統中，對捷聯慣導系統的平臺誤差進行閉環控制，需要將濾波器輸出的校正量反饋到捷聯解算內部，所以必須對捷聯解算進行深入的研究和分析，更何況捷聯解算問題本身也是導航界的一個熱門研究課題；另外，本文還介紹了gps軌道及其星座模擬的設計思想和方案，與以往gps軌道和星座模擬不同的是本文從天體力學中計算春分點開始，逐步進行gps軌道及其星座模擬，這樣的設計方法對從事衛星導航的研究工作是有價值的；還對組合導航中誤差建模方法進行了研究，綜合運用隨機過程、概率統計、時序分析及系統辯識等方面的理論提出了一套適合組合導航卡爾曼濾波的誤差建模方法，並運用實際研究工作中的測量數據對該方法進行了驗證。
  9. As a consequence, the safe coefficient has to be considered according to the result of the calculations when designing. this inevitably makes the structure more redundant than it ought to be. what ' s more, materials are wasted by this design method

    隨著計算機技術的飛速發展，使得有限元分析計算方法得到了廣泛的使用，涉及航空航天，土木，水利，造船及機械工程等各領域，用來進行結構力學分析，流體力學分析，熱傳導和電磁分析。
  10. Futhermore, the simulation software based on spatial opertator algebra, for example, the soft of darts based on spatial opertor algebra researched by rodriguez and others in nasa had been used to a serial of dynamical calculation of aircrafts, and it had become the special analysing software, and almost all the dynamics of americal space airctafts were analyzed by this software. it had neraly saving one handure million dolars and had atahed perfect benefit, so it became the gold medal holder of software of nasa in 1997. but the usa keep the software a secreet to our country, and the software can not shoping wherever. the principle and the method distact form different documents and papers

    此外基於空間運算元代數的模擬軟體，例如美國nasa科學家rodriguez等研究的基於空間運算元代數的分析軟體darts ，已成功應用於一系列美國航天飛行器動力學模擬計算，成為美國航天飛行器專用分析軟體，幾乎所有的美國航天飛行器皆由此軟體模擬分析，它多年來為nasa節約近1億美圓，取得了良好經濟效益，並成為nasa97年軟體金獎獲得者。
  11. The dean of the faculty of engineering at the university of hong kong, professor ng tung sang, remarked, " this is the first time the department of computer science and information systems signs an agreement on cooperative training with the government sector. this agreement provides second - year students of hong kong university s department of computer science and information systems, especially those studying software engineering, an opportunity to get practical training in hko so as to broaden their experience and to enhance their competitiveness after graduation

    香港大學工程學院院長吳冬生教授表示:這次是港大計算機科學及資訊系統系首次與政府機構簽訂聯合培訓計劃，這項合作旨在為系內二年級學生，特別是修讀軟體工程的學生，提供機會到香港天文臺進行實習，令學習能跨越課本的范疇，擴闊同學的視野，加強他們畢業后的競爭力。
  12. According to orthogonal design, the value levels of the mechanical parameters were chosen, and simulation schemes were arranged ; the related analytical samples for neural network were given by flac ( superscript 2d ) calculations ; rbf neural network was trained ; the physical and mechanical parameters of an open pit slope were analyzed backwards by well - trained rbf neural network and surveyed data about spot displacements

    按照正交設計要求，選定反演參數的水平，確定數值模擬方案;用flac （上標2d ）差分程序計算得出相應的神經網路分析樣本；對rbf神經網路進行訓練；利用現場監測位移，對某露天礦邊坡巖體的力學參數進行神經網路反分析。
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