• 该文讨论了使用中轨共地面迹星座建立区域覆盖卫星通信系统优化设计方法

    An optimization design method for implementing regional coverage satellite system with common-track constellation is proposed.

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  • 拦截飞行过程推力持续定常方式小脉冲方式施加在垂直视线的方向,目标具有一定的机动能力。

    The interceptor had sustain constant thrust or impulsive thrust perpendicular to the line-of-sight during the flight, and the target was maneuverable.

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  • x - 37空天飞机我们提供更多的试验机会我们任务获取最大价值

    Keeping the X-37 in orbit will provide us with additional experimentation opportunities and allow us to extract the maximum value out of the mission.

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  • 各种风景充满线形元素——小路火车栅栏山脊线,树枝等。

    Landscapes are full of linear elementsroadways, train tracks, fencerows, ridgelines, tree branches.

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  • 根据报告DNA上”风险嗜好志愿者50%的过去背叛过伴侣,携带冒险基因变异体的人只有22%曾经出过

    Half of those with a love of risk imprinted in their DNA reported committing infidelity in the past, compared with 22 percent of those without the variant.

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  • 9月22日欧南方天文台智利发布极端长曝光的“日图”太阳横穿天空180

    The sun crosses the sky roughly 180 times in an extremely long-exposure "solargraph" released by the Chile-based European Southern Observatory (ESO) on September 22.

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  • 目前为止Cuadrilla公司完成两个探井,第三探井即将完工但是公司的“宏大设想,他们将在未来的16年里,在地区出800个探井

    Cuadrilla has so far only drilled two exploration Wells, with a third soon to be completed, but in its "high-end" scenario it envisages drilling 800 Wells in the area over 16 years.

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  • 无线资源管理卫星通信系统一个重要研究方面

    An important aspect of LEO satellite communication system is to manage the radio resources.

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  • 创建表面使用扫描第2相切选项为了实现切线选项,必须建设表面部分

    Create the surface using sweep 2 rails with the tangency option on. To achieve tangent option you will have to build the surface in parts.

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  • 维修过程注意不要随便改变原来、出油口位置以及喷油泵出油口之间连接关系

    During maintenance, it is not permitted to change the original position between the inlet and outlet on the common rail pipe and connection from pipe and pump at random.

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  • CDMA作为噪声强、带宽分配灵活保密性传输接入方式广泛的应用于民用、军用卫星通信系统

    CDMA technology is widely used in LEO satellites communication because of many merits offered by CDMA system such as suppression of ingress noise, flexibility of bandwidth assignment and the security.

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  • 行驶了半个小时平坦的一望无际的戈壁消失了取而代之距离车百米之遥连绵山丘,一应是暗淡的土黄色生命似乎无尽的土黄色绝迹了。

    Half an hour later, the planar endless Gobi disappears, replacing it is the continuous massif all in the yellow color of ocher — Life seems dying out in this limitless yellow.

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  • 最后提出了高校内部会计控制应用局限高校内部会计控制管理人员滥用职权蓄意营私舞弊或内部不相容职务的人员串通作弊

    Finally, the essay presents the system limitation in the application of internal accounting control like abuse of power by the supervisors, deliberate corruption, collusive cheating and so on.

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  • 为了使航天测控分离得到数据能够时获得应用提出一种修正方法

    To use the data after separation of satellite and rocket in the process of calculating orbit, a correction method is proposed.

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  • 因此研究环境下微弱导航信号捕获极其重要的,是解决高卫星星GPS应用一个关键技术

    So it is important to study the acquisition of weak navigational signal in geostationary orbit environments, and it is a key technique to the application of GPS onboard GEO.

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  • 视觉伺服可以应用机器人初始定位自动导引、自动障、线跟踪运动目标跟踪等控制系统

    Visual servo system can be used in the control systems of robot original orientation guiding, obstacle avoiding, trajectory tracking and moving object tracking, etc.

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  • 介绍一种新型箕斗卸载曲总结了固定卸载曲设计注意几个问题

    The paper introduced a new type of dump track for bottom dumping skip, and some issues need to be noticed in design are summarized.

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  • 同时以hitsat卫星电源分系统故障诊断证明模型小卫星在故障诊断系统有效性可用性。

    Furthermore, taking the power subsystem's fault diagnoses of HITSAT small satellite as an example, we have proved the validity and usability of this model in the paper.

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  • 根据研制电控可变气门系统机构的工作机理,建立压共电控可变气门系统仿真模型,试验证明精度达到了93 % 。

    On the basis of the principle of a middle pressure common rail electronically controlled variable valve system, a model has been built for modeling the system and its accuracy achieves 93%.

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  • 介绍复合导电系统作用工作原理结构常用材料

    The role, working principle, structure and commonly used material of steel aluminum composite conductor rail in the three-rail system are introduced.

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  • 论述冷却技术空间飞行液氦再供给机载验证、低温风洞技术、制备应用前景等。

    Including the superfluid helium, the providing of liquid helium to the plant in the space on orbit, cryogenic wind tunnels techniques, the preparation and application of slush hydrogen etc.

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  • 对地观测卫星背景,分析姿态控制系统单机部件出现故障,系统将会出现的状态变化情况,找出故障部件判定方法

    This article analyzes the status change in the attitude control system when faults appear based on one polar orbit satellite, and provides a method to decide faulty component.

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  • 用气测重力加速度实验给出了水平调节简单方法

    Based on plenty of experiments a simple method of adjusting the air track horizontally is given.

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  • 杂谈托链轮、、驱动链节长时间运转过程出现一定程度磨损

    Entrusted sprocket, supporting wheels, wheel and rail links and so on, in the long running process, there will be a certain degree of wear and tear.

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  • 针对卫星精密定过程观测资料存在粗以及观测资料的合理定问题,差方差分量估计引入到卫星精密定

    In this paper, the robust variance component estimation is introduced into the satellite orbit determination to resist the effects of outlying observations and to determine the weights.

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  • 电离层星观测卫星(LEO)高度低时,以上电离层电子含量(TEC)对掩星反演的影响不能忽略。

    When the low-Earth orbit (LEO) satellite is low, the contribution of the Total Electron Contents (TEC) above the satellite is not neglectable for inversion of GPS-LEO ionospheric occultation.

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  • 发射过程力学环境运行时环境,影响航天光学遥感器的尺寸稳定性进而影响成像质量

    Dynamic environment in launching and thermal environment on orbit affect dimension stability of space optical remote sensor, thus declining its imaging quality.

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  • 通过设置带材轧机上的无驱动装置,对轧制工作表面进行在线磨别,保证轧辊保持良好型。

    The work roll surface can be ground on-line by a non-driven cup type of on-line Roll Grinder(ORG) installed in a strip mill to maintain the appropriate roll shape.

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  • 通过设置带材轧机上的无驱动装置,对轧制工作表面进行在线磨别,保证轧辊保持良好型。

    The work roll surface can be ground on-line by a non-driven cup type of on-line Roll Grinder(ORG) installed in a strip mill to maintain the appropriate roll shape.

    youdao

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