near-earth orbit 中文意思是什麼

near-earth orbit 解釋
近地軌道
  • near : adv 1 近 接近 鄰接 （opp far）。2 〈口語〉幾乎 差不多 將近。3 節省地。prep 接近 在…的近旁；快要。...
  • earth : n 1 〈常E 〉 地球。2 大地，陸地，地面，地上。3 土壤，土。4 【化學】土類；泥。5 世界人類；人的軀體...
  • orbit : n 1 【天文學】軌道；【解剖學】眼窩，眶；（鳥或昆蟲的）復眼緣的頰部。2 （人生的）旅程，生活過程；...
  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. 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. )

    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，其運動可深人到地球軌道的內部，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。
  3. 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
  4. Some asteroids, despite their small size, possess satellites of their own. a handful of others suffer serious perturbations by major planets and travel in highly eccentric orbits, which can send them well beyond the orbit of jupiter. the so - called near - earth asteroids cross the earth s orbit and make occasional close calls to our home planet

    有些小行星體積雖小，但竟然擁有衛星而有些小行星，由於受到其他大行星的強烈攝動，軌道為極狹長的橢圓，遠日點甚至延伸至木星的軌道以外近地小行星則會越過地球的軌道，不時在我們的庭園掠過，偷窺地球的一切，若有天真的登門造訪旄轟！
  5. International space station in near earth orbit, nasa astronauts carried out space walks and lost a bolt and a watcher

    在國際空間站接近地球軌道的地方， nasa的宇航員完成了太空行走，迷失了一個螺釘和一個觀測儀
  6. The asteroids are the most important small bodies in the solar system, 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

    摘要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。
  7. 2. systems analyzed on the design principle of near - earth orbit, regression orbit, stationary orbit, critical orbit and construction orbit. base on this, a orbit design model is given

    2 、系統研究了近地軌道、太陽同步軌道、回歸軌道、靜止軌道、臨界和凍結軌道的設計原理，在此基礎上，建立了軌道設計模型。
  8. It also appears to solve the deuterium problem but only if the rocky materials out near the earth ' s present orbit picked up some local water from the solar nebula ( the cloud of gas and dust surrounding the young sun ) before they accreted to form the earth

    同時，看上去它也解決了氣含量的問題? ?但是只有當外來的巖石物質處于地球現今軌道附近時，並且在它們增生形成地球之前，從太陽的星雲里（圍繞著年輕太陽的氣體和塵埃）獲取了水時，這個問題才最終得到解決。
  9. Tt china has established an integrated tt network comprising tt ground stations and ships, which has successfully accomplished tt missions for near - earth orbit and geo - stationary orbit satellites, and experimental spacecraft

    航天測控。中國已建成完整的航天測控網，包括陸地測控站和海上測控船，圓滿完成了從近地軌道衛星到地球靜止軌道衛星、從衛星到試驗飛船的航天測控任務。
  10. Moreover, we will also meet the scientists of the b612 project in this film who believe they may have the solution. their aim is to send a spacecraft to land on a near earth asteroid and gently nudge it along, changing the asteroid s orbit

    參與b612任務的科學家正研究發射一艘太空船，在一顆近地小行星上降落，然後緩緩把它推移，從而改變這顆小行星的軌道。
  11. Two spacecraft ’ s rendezvous technology in coplanar near - earth orbit with maneuvering target, based on the sight coordinate system is presented in this paper. differential games guidance law ( dggl ) and proportional navigation ( pn ) are studied

    本論文研究了近地共面軌道兩空間飛行器在目標機動下的在軌交會技術，分別對微分對策制導律和比例導引制導律兩種制導方法進行了研究。
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