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satellite     
相关语句
  卫星
     On Key Technologies of the On-Board ATM Switching Satellite Communications System
     星上ATM交换卫星通信系统的关键技术研究
短句来源
     Studies on the Attitude Determination and Control System of High Precision Three-Axis Stabilized Satellite
     高精度三轴稳定卫星姿态确定和控制系统研究
短句来源
     Study on the Autonomous Orbit Determination and Control System of Near Earth Satellite
     近地卫星自主轨道确定和控制系统研究
短句来源
     Models and Algorithms on Processing of High-Resolution Satellite Remote Sensing Stereo Images
     高分辨率卫星遥感立体影像处理模型与算法
短句来源
     Effect of Acute Exercise on the Satellite Cells and Cytoplasmic Ca~(2+) Metabolism of Rat Skeletal Muscles
     急性运动对大鼠骨骼肌卫星细胞增殖能力和不同pH值对骨骼肌细胞胞浆Ca~(2+)代谢的影响
短句来源
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     On Key Technologies of the On-Board ATM Switching Satellite Communications System
     上ATM交换卫通信系统的关键技术研究
短句来源
     Study on the Key Techniques of DS-CDMA Small Satellite Communications and Implement the Switched System on Board
     DS-COMA小卫通信关键技术研究及上交换系统的实现
短句来源
     THE DEVELOPMENT OF SATELLITE POSITION DETERMINATION AND COMMUNICATION SYSTEM
     发展我国的基定位通信系统
短句来源
     CHARACTERISTICS OF SLANT PATH RAIN ATTENUATION AND ITS POSSIBLE INFLUENCE ON SATELLITE SYSTEM DESIGN
     —地路径雨致衰减特性及其对卫系统设计的可能影响
短句来源
     ANALYSIS AND SIMULATION OF NONLINEARITY OF TRANSPONDER ON BOARD GEOSTATIONARY METEOROLOGICAL SATELLITE
     风云二号上转发器功率放大器的非线性分析与模拟
短句来源
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  随体
     The chromosomal number of the diploid of Brachymystax Ienok from Luanhe river system was 2n=92. The karyotype was: 14M+14SM+64(ST, T), NF=120. A satellite was observed in one of the largest metacentric chromosomes in a plate.
     滦河水系的细鳞鱼(Brachymystax Lenok)二倍体染色体数为2n=92.核型:14M+14SM+64(ST,T),NF=120.并在一个中期分裂相中观察到一条最大的中部着丝点染色体上具有随体.
短句来源
     Each monosomic karyotype is 2n-1=20″+ 1′=41,nd 1B and 6B mnonosomic chromosomes are the Same as“ChineseSpring”with a satellite.
     每一单体核型均为2n-1=20″+1′=41,且1B 和6B 单体染色体均具有随体,与“中国春”1B 和6B 单体染色体形态一致。
短句来源
     4 cases had chromosome satellite variations, it was 0.85% in all cases(10.81% in abnormal karyotypes);
     随体异常 4例 ,检出率 0 85 % (占异常总数 10 81% ) ;
短句来源
     2,3,4,6,9 are SM and the satellite, Ag-NORs are on 12qter,in P. omeimontis, without SMand on 6qinter of Ag-NORs in P. mutus, but in Rhacophorus.
     峨眉泛树蛙Nos.2,3,4,6.9为SM,随体和Ag-NORS在12qter;
短句来源
     The results showed that the karyotype of Akebia trifoliata was 2n=2x=16=10M+2SM+2ST+2T,X=8,2B karyotype Chromosome 2 of Akebia trifoliata has a double of satellite.
     结果表明 :三叶木通核型为 2n =2X =1 6=1 0M +2SM +2ST +2T ,X =8; 2B类型 ,第 2号染色体上有一对随体
短句来源
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  人造卫星
     PRARE (Precise Range And Range-rate Equipment) is a space-borne, two-way, two-frequency microwave satellite tracking system developed by Germany in 1990's. PRARE canautomatically provide precise range and range-rate measurements under all weather condi-tions, with full-rate precision 2.5 - 6.5 cm for range and 0.1 mm/s for Doppler, normal-pointprecision 1 cm and 0.015 mm/s, respectively.
     PRARE(Precise Range And Range-rate Equipment)是二十世纪九十年代由德国发展的一种双频、双程、空基、微波卫星跟踪系统,可以为人造卫星提供精密的距离和距离变化率两种观测,单次观测精度分别为2.5-6.5cm和0.1mm/s,标准点精度为1cm和0.015mm/s.
短句来源
     ORACLE FORMS’ APPLICATIONIN ARTIFICIAL SATELLITE DBMS
     人造卫星数据库管理系统中ORACLE FORMS的应用
短句来源
     Satellite Observation and its Application at Yunnan Observatory
     云南天文台人造卫星观测与相关应用研究
短句来源
     SATELLITE IN LOW ORBIT(CHAMP,GRACE,GOCE) AND HIGH PRECISION EARTH GRAVITY FIELD:the latest progress of satellite gravity geodesy and its great influence on geoscience
     低轨道人造卫星(CHAMP、GRACE、GOCE)与高精度地球重力场——卫星重力大地测量的最新发展及其对地球科学的重大影响
短句来源
     This paper described the design principle and the experimental results of 70.5 kHz and 94.5kHz differential bridge piezoelectric ceramic filters used in satellite.
     介绍了人造卫星用70.5kHz和94.5kHz差接桥型压电陶瓷滤波器的设计原理和试验结果。
短句来源
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      satellite
    At the end of the article, the method is tested on real magnetic field data measured by the German geoscientific research satellite CHAMP.
          
    New dynamic routing algorithm based on MANET in the LEO/MEO satellite network
          
    The features of low earth orbit/medium earth orbit (LEO/MEO) satellite networks routing algorithm based on inter-satellite link are analyzed and the similarities between satellite networks and mobile Ad Hoc network (MANET) are pointed out.
          
    The similar parts in MANET routing protocol are used in the satellite network for reference.
          
    A new dynamic routing algorithm based on MANET in LEO/MEO satellite networks, which fits for the LEO/MEO satellite communication system, is proposed.
          
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    On the basis of new facts and laws revealed by modern astronomy and physics, it seems necessary and expedient to introduce the concept of "cos- moscopic" process, to stand side by side with macroscopic and microscopic processes. Cosmoscopic objects differ from macroscopic objects (things seen everday on the Earth as well as meteoric bodies, small asteroids and satellites) in mass and scale just as much as the difference between macroscopic objects and microscopic objects. Gigantic difference in quantity...

    On the basis of new facts and laws revealed by modern astronomy and physics, it seems necessary and expedient to introduce the concept of "cos- moscopic" process, to stand side by side with macroscopic and microscopic processes. Cosmoscopic objects differ from macroscopic objects (things seen everday on the Earth as well as meteoric bodies, small asteroids and satellites) in mass and scale just as much as the difference between macroscopic objects and microscopic objects. Gigantic difference in quantity leads to marked difference in quality. The mechanical motion of celestial bodies, the dynamics of stellar systems, the condensation of self-gravitating gas mass, natural ther- monuclear reactions in stellar interior, the production of forbidden lines in nebulae and outer envelopes of stars, the strong coupling between hydrody- namic phenomena and electromagnetic phenomena, the existence of superdense matter, curvature of space in strong gravitational field, the evolution of celes- tial bodies, all these are examples of cosmoscopic phenomena and processes, and also form the basis on which the cosmoscopic concept is introduced, Stellar dynamics, cosmical electrodynamics, and general theory of relativity are examples of cosmoscopic laws. In cosmoscopic processes, gravitational interaction usually plays a dominant role, and plasma state is the state of matter most often met. The cosmoscopic concept will aid tn understanding more deeply material processes in the inorganic world. It will prevent us from applying without modification to cosmoscopic processes natural laws which strictly speaking applies only to macroscopic processes. Once the cosmoscopic law is understood, man can then create artificially cosmoscopic conditions on the Earth so that processes which only take place naturally in cosmoscopic processes, can then take place on the Earth. Thermonuclear reactions, forbidden lines (now applied so much in "Excited emission") are two examples; artificial cosmic rays, and artificial superdense matter might be realized later. In carrying out simulation experiments, the effect introduced by difference in scale and mass must be kept in mind. Differentiation among cosmocscopic, macroscopic, and microscopic processes shows that dialectical laws operate everywhere in Nature.

    根据现代天文学和物理学的研究结果,有必要在微观和宏观之外建立宇观这个概念。宇观客体和宏观客体在量质和尺度方面的差别不亚於地上常见的宏观客体和微观客体的差别。量的巨大差异导致质的显著不同。天体的机械运动,恒星系统及其成员的运动,质量和体积都很大的气团由於自吸引而产生的凝聚,恒星内部的天然热核反应,星云和恒星外壳中禁戒谱綫的产生,流体运动同磁场的强耦合,天然超密物质的存在,强引力场中空间的弯曲,和天体的演化,这些都是宇观现象和宇观过程的具体例子,也是提出宇观概念的科学依据。星系动力学,宇宙电动力学,广义相对论等是宇观过程规律的例子。在宇观过程中,万有引力常起重要的作用,而等离子态是最普遍的物态,宇观概念将帮助我们更深刻地认识无机界的物质过程。它将使我们不致於把只适用於宏观过程的规律不加改变地就用於宇观过程的探讨上。在掌握了宇观规律的基础上,可以在地上用人工方法创造宇观条件,使那些只有在宇观条件下才能够天然地发生的过程,如热核反应,禁戒谱綫,物质的高度密集,宇宙綫等,在地上也能发生。进行模拟实验时应当注意质量和尺度的差异所引起的质的不同。宇观、宏观、微观的区别说明了辩证规律在自然界中处处在作用着。

    Re-entry of an artificial satellite is a very complicated problem. It is related to many scientific theories and technical problems. This paper discusses only the re-entry orbit. Some reasonable re-entry orbits of a manned space-ship are presented. Safe return to the earth's surface is ensured by utilizing terrestrial aerodynamical forces (drag and lifting forces), and the main point is to solve the problem of large deceleration. This work commences from the differential equations of motion of an artificial...

    Re-entry of an artificial satellite is a very complicated problem. It is related to many scientific theories and technical problems. This paper discusses only the re-entry orbit. Some reasonable re-entry orbits of a manned space-ship are presented. Safe return to the earth's surface is ensured by utilizing terrestrial aerodynamical forces (drag and lifting forces), and the main point is to solve the problem of large deceleration. This work commences from the differential equations of motion of an artificial satellite with respect to the effects of the gravitational force and the aerodynamical forces of the earth. Firstly, approximate analytical solutions are obtained, expressed by formulae (11) and (12), then from these, two ways are found for solving reasonably the problem of large deceleration (maximum value not exceeding six times the gravitational acceleration on the earth's surface): one is to vary the coefficient of drag; the other is to utilize small suitable lifting force (or ratio of drag and lift). Further, according to these two ways, three kinds of re-entry orbits are calculated by precise numerical method. On selecting suitable initial values, the results of calculation show that these three kinds of orbits can be used to solve the problem of large deceleration, and can minimize the difficulty of the aerodynamical heat. In the last part, the effect of the oblateness of the earth's atmosphere with respect to the re-entry orbit is discussed. The result of calculation shows that this effect is negligible.

    本文讨论利用地球大气动力(阻力和升力)来设计载人飞船安全返航的、主要解决超重问题的合理轨道。从卫星在地球引力和大气动力作用下的运动方程出发,先得到近似分析解(11)和(12)式。由它们得到合理解决超重(最大值小于地面重力的六倍)的两种方案:一是改变阻力;另一是用适当的小升力。然后根据这两个方案用数值方法计算了三种返航轨道。在适当选取初始值时,这三种轨道都可以合理地解决超重问题,同时也能减轻防热困难。最后讨论了地球大气扁率对返航轨道的影响,计算结果表明,它的影响是可以忽略的。

    This paper first sums up the main problem about orbit prediction of an artificial earth satellite. It gives the computing methods of first, second order secular perturbations and first order short periodic perturbations about the oblate earth in the vicinity of the critical inclination, and also gives the computing method to correct the perturbed mean anomaly.

    本文将对人造地球卫星轨道预报中的主要问题作一概括;并给出接近临界角时,地球形状的一、二阶长期摄动和一阶短周期摄动的计算方法,以及摄动计算中对平近点角的改进方法。

     
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