earth axes 中文意思是什麼
earth axes
解釋
地面坐標系-
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。 -
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 -
The results show that the main factors influenced structural earthquake are earth damage degree, fault length stress and an angle between extend stress axes and fault strike
研究結果表明，地殼損傷程度、斷層長度、應力及拉應力軸與斷層走向之間的夾角是影響構造地震的主要因素。 -
According to calculations, the twisted space - time around earth should cause the axes of the gyros to drift merely 0. 041 arcseconds over a year. an arcsecond is 1 3600th of a degree
根據運算，地球周圍扭曲的時空只會引致回轉儀轉軸每年漂移0 . 041角秒，一角秒為1度的3600分之一，可見程度之小。 -
Fiber optic gyro ( fog ) inertial system provides angular velocity and acceleration measurement of measurement body along three axes, based on the attitude matrix refreshed by outputs angular velocity to transform the acceleration from the body frame to the earth frame, finally through acceleration integral we can get the position of the measurement body in the space. fog is popular in the navigation field for many advantages, such as wide dynamic range, high resolution and all solid components
該測量方法利用捷聯式光纖陀螺輸出的角速度和加速度信息，測出運載體沿三個方向的加速度分量；再利用光纖陀螺輸出的角速率信號，不斷更新測量體的姿態轉換矩陣，將加速度分量用轉換矩陣更換到地理坐標系；最後經過計算機對轉換后的加速度信號積分運算分別可得到運載體在三維空間中的位置。
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