近地點推進 的英文怎麼說

中文拼音 [jìndediǎntuījìn]
近地點推進 英文
perigee propulsion
  • 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...
  • 點 : Ⅰ名詞1 （液體的小滴） drop （of liquid） 2 （細小的痕跡） spot; dot; speck 3 （漢字的筆畫「、」）...
  • 推 : 動詞1 （向外用力使物體移動） push; shove 2 （磨或碾） turn a mill or grindstone; grind 3 （剪或削...
  • 進 : 進構詞成分。
  • 推進 : 1 （推動工作 使前進） push on; carry forward; advance; give impetus to 2 [軍事] move forward; dri...
  1. The complex nonlinear pursuit - evasion model of two spacecraft in near - earth coplanar orbit is simplified to linear model, the circular region the radius of which is equal to capture radius is defined as target set, capture is achieved when the evader come into the target set and the game is over ; the boundary of useable part ( bup ) is determined, and the analytical form solution of the linear equations is obtained by backward integration of the state variables from the bup, the linear barrier of the pursuit - evasion model and the optimum thrust of the both sides are thus obtained

    本文將近地共面軌道內運動的兩飛行器非線性追逃模型簡化為線性模型，以捕獲半徑的圓域定為目標集，確定目標集邊界上的可用部分，並以此為各狀態變量的起點，對時間進行倒向積分，求得線性方程組的解析解，從而確定了該追逃模型的線性界柵，以及界柵上對策雙方的最優推力，即求得了滿足最優策略時相對運動的軌跡和推力。
  2. In recent years, plentiful and substantial fruits achieved by the lb method in simulations of hydraulics, multiphase flows, flows in porous media and heat transfer as well as magnetohydrodynamics, have revealed a broad perspective of application of this method, it will become a powerful competitor to the conventional approaches. in order to absorb the recent achievement in theory and application of the lb method, explore new ways in hydraulic computation to promote the development of practice, some work is car ried out in this thesis, as following : advances in the theory research and application, deductive process of the d2q9 model and some other commonly used models of the lb method are summarized. based on the hydrodynamic and general boundary conditions, a new joint boundary condition is presented, it integrates advantage of the two conditions above and obtains very good results in dealing with all kinds of boundaries of flow fields

    為了消化和吸收近年來lb方法在理論和應用方面的新成果，探索在水力計算方面的新途徑以促進lb方法實用化的發展，本文進行了下列研究工作：綜述了lb方法在理論研究和實際應用方面的新進展，以及d2q9模型的推導過程和其他一些常用的模型；在水動力邊界條件和通用邊界條件的基礎上提出了一種新的聯合邊界條件方法，它綜合了上述兩種邊界條件的優點，在流場的各種邊界處理中取得了非常好的效果，經過模塊化的處理以後這種邊界條件具有更好的實用性；針對均勻網格的lb方法計算效率較低的不足，提出了雙重網格的latticeboltzmann方法，通過二維poiseulle流動、后臺階流動和渠道方槽流動三個算例的模擬，證明這種方法能夠明顯地提高流場模擬的計算效率；此外，根據復雜區域流場的特徵提出了latticeboltzmann方法的分塊-耦合演算法，利用lb方法的計算特性實現塊與塊之間的數據交換，充分利用計算資源提高計算效率，通過對「 t 」型、 「十」型和「 x 」型分岔管道流場的模擬，展示了這種演算法的特徵和優點，以及它所具有的應用前景。
  3. The main contents are as follows : firstly, the distinguishing feature of earth pressure in different lying way and the main calculation methods of the vertical earth pressure are analyzed and compared, the defect and applying limitation of earth calculation formula are pointed out. based on the elastic theory, formula to calculate vertical earth pressure on general trenching conduit is derived

    其主要內容包括以下幾個方面： 1 、對不同敷設方式的地下埋管的受力特點進行了分析，在此基礎上，介紹了上埋式管道垂直土壓力的幾種主要計算公式，指出了各種公式的局限性及其適用范圍，並以彈性理論為基礎推導了一般溝埋式管道垂直土壓力的近似計算公式。
  4. The forecast of the geographical equilibrium point of k has been made using different methods. the result indicates that the order of the geographical equilibrium point of k is : total k > l / 2k > - k, ck. 5. the result indicates that the geographical equilibrium point of 1 / 2k is the most suitable one for the sustainable use of land and fertilizer resource

    用灰色極限推測理論和時間序列分析對作物收獲后的土壤鉀素地理平衡點進行了預測，結果表明平衡點順序為：全k處理> 1 2k處理> - k處理、 ck處理， - k的平衡點與ck接近，兩者差異不顯著，而施用鉀肥的外源平衡點高於內源平衡點。
  5. Withal, basing on study on the domestic and foreign farmland appraisal, on introduction land resource use trait in outskirts hill chongqing, the thesis introduces firstly international all - purpose five principles of sustainable land use management, exerts delphy to accept or reject repeat index elected, manages ahp and dsr to demonstrate system with bishan of representative outskirts hill county chongqing as a sample, studies on farmland appraisal index system of outskirts hill chongqing, and looks forwards to favoring farmland appraisal work of chongqing and doing indeed southward hill zone. the central conclusion as follows : 1 in the background of town land appraisal constantly perfect in our country, the cultivated land value management, as the part of land market, is more and more important

    對此，本文在分析國內外農用地分等定級研究的基礎上，通過對重慶市近郊丘陵區土地資源利用特點的詳細介紹，引入國際上通用的持續土地利用管理的五大原則的基本框架，運用特爾斐法對所選指標進行多輪取捨，結合層次分析法、 「推動力?狀態?反應」法等數學方法，以重慶市典型的近郊丘陵縣? ?璧山縣為體系論證樣點進行體系論證，就重慶市近郊丘陵區農用地分等定級指標體系作以研究，以期對重慶市乃至南方丘陵地帶農用地分等定級工作的開展有所裨益。
  6. The main features in the study of flood forecasting and control system are as follows : ( 1 ) runoff generating and confluence theory and hydro - dynamic method are adopted to predict the water level of taihu lake and key nodes, the basin wide forecasting and control system with the function of real time correction has been first established in plain river network to meet the complicated flow conditions of taihu lake basin and to enhance the reliability of forecasting results ; ( 2 ) according to the rainfall in foreseen period multiple schemes can be made in the forecasting model and adjusted with time, which overcomes the errors caused by the uncertain rainfall in the foreseen period so as to make the forecasting results approach reality

    本文所研究的預報調度系統有如下特點： （ 1 ）本系統採用產匯流理論和水動力學方法預報太湖及重要節點水位，首次在平原河網地區建立了具有實時校正功能的全流域預報調度系統。以適合太湖流域復雜的水力條件，增強預報的可靠性; （ 2 ）預報模型可以根據預見期降雨量進行多方案預報，並隨時間推移，可以實時進行調整，克服由於預見期降雨不確定引起的誤差，使預報結果更接近實際。
  7. It indicates that the diffusion is the important factor of gas losing in binbei region. this paper researched the hydrodynamic pressure and its change characteristics in the space by means of the ion concentration of formation water, reduced pressure and its change characteristics in the plane, the result indicates that from north - east to south - west, the hydrodynamic conditions are better and better in binbei region, the areas near the binbei railroad are the favorable area for oil and gas to accumulate

    利用水化學離子濃度，折算壓力大小及其平面變化對濱北地區水動力強弱及其空間變化特徵進行了研究，結果表明濱北地區水動力條件變化趨勢為由東北向西南逐漸變弱的特點，由此推斷濱州線附近應是濱北地區油氣保存的有利地區。
  8. According to the design theory of the cable - stayed bridge and to the feature of the cantilever construction the authors propose a construction control method called optimum completion state method ( ocsm ) for rc cable - stayed bridges in the proposed method, the optimum completion state is regarded as the final target of the construction control, and the optimum construction state at each construction stage is taken as the technical route the key of the method is to properly choose or adjust the cable forces the objectives function of optimization is to minimize the elevation error of the girder under the constraint condition that the internal forces ( bending moments ) of the girder are bounded the optimization variables are the cable forces on the basis of the above principles, a optimum model for a construction step is established and cable force adjustments can be found for each construction step in this model, the creep and shrinkage effects of concrete have been considered a bridge example is given which shows that the final state of the bridge is very close to the design aim and that this method is much better than the so - called double - control method the example is a good illustration of the soundness and practical value of the proposed method

    根據現代斜拉橋結構設計理論和懸臂施工方法的特點，提出了以最佳成橋狀態作為施工控制的最終目標，以實施最佳施工階段為技術路線，以索力調整為核心內容的斜拉橋施工控制理論，簡稱為最佳成橋狀態法；以斜拉橋主梁標高誤差最小為目標函數，以主梁內力（彎矩）為約束條件，以索力為優化變量，建立了最佳施工階段的索力調整計算模型；推導了考慮徐變收縮效應的索力調整計算公式；用最佳成橋狀態法對一實橋工程進行了施工控制全過程計算研究，得到的成橋狀態與設計目標相當接近，優于該橋以「雙控」為控制目標的實測結果，有力地證明了本文方法的正確性及其工程實際價值
  9. Foundation structure design in soft soils is a very difficult engineering problem. the elastic foundation beam method has some merits such as easy calculation pattern and definite model and m - method is fit to practical situation, so it is used comprehensively and welcome by constructors, thus m - method is recommended by many codes. but it is difficult to select a m - value to some soils, and the codes provides a scope of m - values, and they are different in varied regions and soil conditions, thus it is optional to choose m - value of a soil layer for engineering designers. so it is necessary to calculate m - values by back - analysis method using measured datu of deep foundation pit

    軟土地區的深基坑支護結構設計是一個十分復雜的工程問題，由於彈性地基梁法具有計算模式明確、計算過程簡單的優點，尤其是m法較符合軟土基坑工程的實際情況，因而受到廣大工程設計人員的歡迎，大多規范也推薦此法。但是m法計算參數的選取是工程界的一大難題，一般規范都給出了m值的大致范圍，而且每個地區的地質條件千差萬別，因而m的取值具有很大的隨意性，有必要根據一個地區的工程實測資料對m值進行反演分析，以便為地層相近或附近地區的基坑工程設計提供參考和依據。
  10. Secondly, the modification function and resonance produced by running power capacitor increased the harmonic at the same time, which worsen the operation environment of itself. it is very important to analyze the reason of harmonic and conduct the valid measure to restrain its affect and guarantee the safely operation of power network. the author has present the point in this paper, based on the operation characteristic of modern power system, the author described the production and development of network harmonic with the consideration on the same kind of problem

    本文以現代電力網路的運行特點為基礎，結合近年來對所涉及的同類問題的思考，對系統諧波的產生、發展的一般規律進行較為全面的理論闡述；以大量事故案例分析諧波所帶來的危害和影響；通過實地測試和對所得數據的分析研究，推導出一種應用matlab的fft的諧波分析方法，給出了該方法的程序流程框圖及結果界面顯示；在此基礎上進一步探討了利用現代通信網路建立電網諧波網路管理分析系統的總體構想和功能。
  11. The fifth part discourses on pushing forwards the " sofe " displacement of the surplus labor forces in the countryside of the west by developing human resources there and sets forth the new arguments and its evidences of the classification of the surplus labor forces in the countryside of the west ; and through the qualitative and quantitative analysis of these surplus labor forces, the author brings forwards a double - track approach of developing the industrialization of the agriculture of the west and accelerating the local replacement of the surplus labor forces in the countryside, at the meantime establishing a government - guided and market - oriented coordinative mechanism to spe

    第五部分論述以人力資源開發來推動西部農村剩餘勞動力的「軟」轉移問題，提出了界定西部農村剩餘勞動力的新觀點及其證據；通過對西部農村剩餘勞動力進行定性和數量分析，提出了發展西部農業產業化，促進農村剩餘勞動力的就地、就近轉移和建立以政府為指導、市場為取向的協調機制，促進農村剩餘勞動力跨區流動的雙軌途徑。
  12. Our company has more than 260 staffs and workers, more than 60 technicians, more than 20 million owns fixed assets and 240 facilities. we have 18 series and 8 patents of hi - tech products. in those, the geared motor for roller table have obtained the biggest market share in china and the dsz series geared motor have been ranked in state torch plan project

    公司新廠區佔地面積12萬平方米，現有員工300多人，專業技術人員80餘人， 2002年銷售收入近億元，產銷及利稅增長率在江東區名列前茅，獲得「寧波市高新技術企業」 「骨幹企業」 「重合同守信用單位」 「寧波市aaa級資信企業」 「 cad應用工程重點推廣企業」 「尊重知識尊重人才先進單位」等榮譽稱號。
  13. To add " the economic activities of hong kong are getting busier by the day and its population keeps growing, and " after " that, as " ; to add " generated " after " amount of waste " ; to add " and trades " after " development of environmental industries " ; to add " and trades " after " comprehensive policy on environmental industries " ; to add " and principles such as polluter - pays to reduce waste generation and increase incentive to recover waste and, at the same time, studying the feasibility of restricting the disposal of toxic waste in landfills, so as " after " producer responsibility scheme " ; to add " the source separation of domestic waste programme as well as " after " comprehensively implementing " ; to add " as well as separation " after " recovery stations " ; to delete " and " after " green procurement policy " and substitute with ", " ; to add " and strongly urging public and private organizations to develop green procurement guidelines " after " to comply with it " ; to add " and labelling " after " green certification " ; to add " as well as establishing a database " after " products and services " ; to add " expediting the tendering exercise for the remaining lots in phase i of the ecopark and expeditiously drawing up a timetable for the granting of lots in phase ii in order to develop high value - added environmental industries ; " after " ; to delete " and " after " related work ; " and substitute with " reviewing the existing legislation regulating environmental industries and trades and actively studying the feasibility of implementing a licensing regime for certain environmental industries and trades, in order to enable a healthy development of such enterprises and, at the same time, avoid causing unnecessary damage to the natural environment and nuisances to the residents in the vicinity ; and " ; to delete the original " and substitute with " ; to add " and trades " after " participate in those environmental industries " ; and to add " and trades " after " promoting the economic development of environmental industries "

    在"鑒于"之後加上"香港經濟活動日益頻繁和人口持續增加， "在"本港廢物"之後加上"產生"在"構成環保工業"之後加上"和行業"在"政府為環保工業"之後加上"和行業"在"生產者責任制"之後刪除" ，以" ，並以"和污染者自付等原則，以減少產生廢物和增強廢物回收意欲，同時研究限制將有毒廢物棄置在堆填區的可行性，從而"代替在"全面推行"之後加上"家居廢物源頭分類計劃和"在"廢物回收點"之後加上"分類"在"遵守， "之後加上"力促各公營和私營機構訂立環保采購指引， "在"環保認證"之後加上"和標簽"在"制度， "之後加上"以及建立資料庫， "在"六"之後加上"加快進行環保園第一期餘下土地的招標工作和盡快制訂第二期計劃的批地時間表，以發展高增值的環保工業"在"相關工作"之後刪除"及" ，並以"七檢討現行規管環保工業和行業的法例，積極研究對某些環保工業和行業實施發牌制度的可行性，令該等企業得以健康發展，同時避免對自然環境帶來不必要破壞和對附近居民造成滋擾及"代替刪除原有的"七" ，並以"八"代替在"具前景的環保工業"之後加上"和行業"及在"推動環保工業"之後加上"和行業" 。
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