橢球星系 的英文怎麼說
中文拼音 [tuǒqiúxīngxì]
橢球星系
英文
spheroidal galaxy-
The conventional sphere model of earth and circle model of orbit are discarded, and the ellipsoid model and the ellipse model are selected for further research, which achieves a method to determine the target position through the antenna pointing direction. and the spaceborne sar system design and simulation software is brought forth. this software accomplishes sar system coefficients design for antenna area, pulse repetition frequency, signal bandwidth, downlink data rate, radar transmitter power and satellite platform yaw steering
本文從星載雷達的星地幾何關系入手，舍棄傳統星載合成孔徑雷達研究中的球地球模型和圓軌道模型，研究了在地球橢球模型和橢圓軌道模型下由雷達天線確定目標坐標的方法，並在此基礎上研製了星載合成孔徑雷達系統設計與模擬軟體，完成雷達系統天線尺寸、脈沖重復頻率、信號帶寬、雷達信號數據率、雷達發射功率、衛星平臺的偏航牽引等幾個方面的系統參數設計以及雷達多普勒特性、雷達系統模糊、雷達定位及精度的分析，最後完成雷達回波信號的模擬。Elliptical galaxies range in shape from almost perfect spheres to flattened globes
橢圓星系的外形范圍從幾乎完美的球體到壓扁的球。Most of these systems show clear evidence for two distinct populations of globular clusters, one blue and one red
這類橢圓星系大多清楚地顯現出一藍一紅、兩種截然不同的球狀星團族群。At least some elliptical galaxies, as well as the bulges and halos of spiral galaxies, may have arisen from such collisions
至少螺旋星系的核球與暈，以及某些橢圓星系，可能是由此種碰撞產生的。They usually consist of old stars. some dwarf ellipticals have as few as 10 million stars, and make them not much different from a large globular cluster
它們通常包含較年老的恆星，有些矮橢圓星系只有約一千萬顆星，和大球狀星團相差不遠。Another intriguing feature of quasisoft x - ray sources is that they locate at different type of galaxies like spirals and ellipticals. quasisoft x - ray sources are also found in the halos of galaxies and even in globular clusters
類軟天體另一有趣之處，是它們不單盤踞在旋渦或橢圓等不同類型星系內，在銀暈甚至球狀星團中竟亦見其蹤影。The calculating results show : ( 1 ) most of samples are located in 5 kpc - 10 kpc from galactic center. all of the sample clusters present a spherical symmetrical distribution around the galactic center, and their space velocities are presented a ellipsoidal distribution ; ( 2 ) according to the metallicity and basic characters, the sample clusters are separated into hb subgroup and mp subgroup. the number of samples are changed with metallicity [ fe / h ], and there is a peak at [ fe / h ] = - 1. 6 ; ( 3 ) the orbits of sample clusters show mostly limited, periodic characteristics, but the orbits are not closed completely, their maximal galactocentric distance is less than 40 kpc
計算結果表明： （ 1 ）大部分樣本星團都位於銀心距5kpc 10kpc的范圍內，相對于銀心呈球對稱分佈，它們的速度也呈橢球分佈； （ 2 ） 29個樣本星團按其金屬度大小和基本性質分類，可分屬hb和mp兩個球狀星團次系，且樣本星團數隨金屬度[ fe h ]而變化，在[ fe h ] = - 1 . 6處出現一個峰值； （ 3 ）所有樣本星團的軌道運動都呈周期性，大都在一個有界而不封閉的周期軌道上運動，其最大銀心距都在40kpc以內。Abstract : taking advantage of charge simulation method and potential coefficientmethod for ellipsoids, point effects of electric field near the surfaceof a satellite are calculated nummerically. antenna point effects on a high voltage spherical satellite arecalculated as an example
文摘:本文使用模擬電荷法和扁橢球體的電勢系數法較好地解決了尖端效應的數值計算問題，並用這一方法，計算了衛星表面尖端的效應This dissertation adopts the modularization programming method to develop the spaceborne sar system design and simulation software, which obtains the windows common interface and logical integrated structure, convenient for usage, maintenance and function extension. 2. as for the earth model and orbit model, according to the properties of spaceborne sar operation, in this dissertation, we reject the sphere earth model and circle orbit model and present a novel way to solve spaceborne geometry relations between radar and target by three ellipses, and achieve the way to determine the target position by antenna pointing direction
在地球模型和軌道模型方面，論文根據星載合成孔徑雷達工作的特點，摒棄了球地球和圓軌道的傳統模型，創新性的採用三個橢圓解決了星載雷達的星地幾何關系問題，得到了在地球橢球模型和橢圓軌道模型下由雷達天線指向確定目標坐標的方法，為星載合成孔徑雷達系統設計與模擬提供了更為精確的幾何基礎。One way to demonstrate a link would be to identify two populations of globular clusters in old elliptical galaxies
要證明兩者彼此相關，其中一個方式，就是在古老的橢圓星系中，同時辨識出這兩類球狀星團。分享友人