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Firstly, This paper processes geometry filtration based on character of orbit's apogee and perigee after orbit model is analyzed and based. Secondly Space Debris is separated into two kinds, coplanar and not coplanar according as location interrelation of target and debris. In Dynamic filtration's processing, considering prediction time limit and orbit perturbation, secular effects which have increaser effect is considered so that some need catching danger time point is appeased, some law about time when target and debris pass intersectant line each other is inferred, when debris and object are in different plane and some similar law also is inferred otherwise. The time list is arithmetical progression. These laws can improve calculation efficiency remarkably; Lastly orbit predict is a course approaching least distance. Danger time point in the last step become beginning time point from which debris and object's position and velocity are calculated by SXP4 Model which is an analytic model.By result, determine that relative movement trend is closer or apart, farther calculate the interval apart from time when predictive least relative distance occurs. Least relative distance and time when least distance occurs is calculated finally. It is a fast approach course adopting varied interval.

本文在分析、建立轨道摄动计算模型的基础上,首先采用基于轨道远、近地点特征对大量编目在册的空间碎片进行初步几何静态筛选,然后根据碎片与目标轨道面的相对位置特点把碎片分为异面与准共面两种情况以进行动态筛选,在筛选过程中考虑到预报时限长度和轨道摄动影响,引入了轨道摄动中具有积累效应的长期项以满足危险时间点的捕捉要求,利用了长期项摄动变化线性的特点导出了碎片与目标异面情况下各自过交线的时间序列成准等差数列的规律性和准共面情况下类似的规律性,从而显著地提高了前期轨道筛选的计算效率;最后对剩余危险碎片和目标飞行器利用SXP4轨道预报模型在前期轨道筛选的基础上以各个危险探测时间点为预报的时间起点,并根据预报计算结果,分析目标和碎片在该时间点的运动趋势是相互远离还是相互接近,推出预计最小相对距离发生时刻相对此刻的时间长度,得到其随时间变化的局部最小相对距离以及危险距离发生的时刻和相对速度,这是一个采用变时间步长、快速逼近最小相对距离的过程。

If parties have joint liability, then they are each liable up to the full amount of the relevant obligation.

如果各方承担共有责任,则他们各自应地对全部的相关债务承担责任。

Entering through the decorated archway at the roadside, I saw stalls in horizontal and vertical lines, selling various tourist articles. They were like the big and small stalls that could be seen everywhere in the tourist spots back in China. Although every stall was warmly introducing their goods, no one liked the Chinese men and women who would stick like a limpet to force the travelers to buy things.

从街口处的牌楼进去,广场上横竖成行的摊位上,出售着各种旅游品,正象国内到处可见的旅游点上的大小摊位一样,尽管各家也在过分热情地介绍着他们各自的货色,却没有国内那种死死缠住行人,逼你买东西的男女。

In order to make the Type A single ended modern travelling wave based fault location principle for transmission lines using fault induced transient travelling waves to be better ...

为了将利用故障暂态行波的A型单端现代行波故障测距原理更好地用于实测波形分析,将其划分为3种独立的运行模式,即标准模式、扩展模式和综合模式,并给出了各自用于实测电流暂态波形分析的典型实例。

The technology of emulsify-cation in the way of ultrasonic wave and mechanical stir is widely investigated. Factors having influence on stability of emulsions produced in two ways is carefully explored, and the law of parameters of emulsification technology which affect the stability of emulsions is obtained. The two ways are compared, their scope of application is clear.

对用超声乳化法和机械搅拌法制备乳化液的工艺作了深入的研究,细致地探讨了影响乳化液质量的因素,摸索出各乳化工艺参数的影响规律,并且对两种乳化方法作出了比较,得出了它们各自的适用范围。

This invention provides compounds of Formula; wherein: R is a moiety selected from the group: and n is an integer of 1 or 2; R is selected from hydrogen, amino,-NRR, alkyl of 1 to 12 carbon atoms optionally substituted, aryl of 6, 10 or 14 carbon atoms optionally substituted, alkenyl of 2 to 12 carbon atoms optionally substituted, alkynyl of 2 to 12 carbon atoms optionally substituted, halogen, and a 5 to 10 membered heteroaryl ring optionally substituted, having 1 to 4 heteroatoms independently selected from N, O and S; R is selected from hydrogen, alkyl of 1 to 12 carbon atoms optionally substituted, aryl of 6, 10 or 14 carbon atoms optionally substituted, alkenyl of 2 to 12 carbon atoms optionally substituted, vinyl, alkynyl of 2 to 12 carbon atoms optionally substituted and halogen; R is H, alkyl of 1 to 12 carbon atoms optionally substituted, cycloalkyl of 3 to 8 carbon atoms, bicycloalkyl of 5 to 10 carbon atoms or aralkyl optionally substituted; R is OH or -OH; R and R are each independently H or alkyl of 1 to 12 carbon atoms or when optionally taken together with the nitrogen atom to which each is attached form a 3 to 8 membered saturated heterocyclyl ring; R is alkyl of 1 to 12 carbon atoms optionally substituted; or a tautomer or pharmaceutically acceptable salts thereof.

本发明提供式的化合物;其中:R 1 为选自基团和的部分;n为整数1或2;R 2 选自氢、氨基、-NR 6 R 7 、具有1到12个碳原子的视情况经取代的烷基、具有6个、10个或14个碳原子的视情况经取代的芳基、具有2到12个碳原子的视情况经取代的烯基、具有2到12个碳原子的视情况经取代的炔基、卤素和具有1到4个独立地选自N、O和S的杂原子的视情况经取代的5元到10元杂芳基环;R 3 选自氢、具有1到12个碳原子的视情况经取代的烷基、具有6个、10个或14个碳原子的视情况经取代的芳基、具有2到12个碳原子的视情况经取代的烯基、乙烯基、具有2到12个碳原子的视情况经取代的炔基和卤素;R 4 为H、具有1到12个碳原子的视情况经取代的烷基、具有3到8个碳原子的环烷基、具有5到10个碳原子的双环烷基或视情况经取代的芳烷基;R 5 为OH或-OH 8 ;R 6 和R 7 各自独立地为H或具有1到12个碳原子的烷基,或当视情况与其所连接的氮原子连接在一起时形成3元到8元饱和杂环基环;R 8 为具有1到12个碳原子的视情况经取代的烷基;或其互变异构体或医药学上可接受的盐。

Let me dedicate this book to the memory of Abney Hall-its kindness and its hospitality. And a happy Christmas to all who read this book.

中篇小说集,波洛和马普尔小姐很罕见地出现在同一本书里,虽然只是分别出现在各自的故事中。

Then summarize the theory, merit and demerit of the arithmetic of classic key-frame extraction.

然后比较系统地总结了经典关键帧提取的算法与原理及各自的优缺点。

In order to be able to transmit a variable volume of data, particularly in a single coherent data block, between message transmission planes of telecommunications interfaces of a hybrid telecommunications system with minimal effort within the message transmission planes, if the variable data volume exceeds the maximum data volume which can be transmitted between the same message transmission planes of the telecommunications interfaces, then a data element specific to the transmission layer is used as a function of the varying data volume at least twice in succession for the transmission of the data volume in the data block.

要約 为在混合通信系统中能各自以最小的传输工作量在各通信传输层面中传输混合通信系统各通信接口的通信传输层面之间的一个变化的数据量,尤其当此变化的数据量超过在各通信接口的相同通信传输层面之间最大可传输的数据量时仍能在一个单一的互相关联的数据块中传输此变化的数据量,取决于此变化的数据量至少两次依次地对在数据块中的数据量的传输采用一种传输层面专门的信息元素。

In the exploration enterprise internationalization's developing process the afterheat excess pressure recycling use which serves under somebody's banner (afterheat electricity generation excess pressure use and so on) the construction energy conservation transformation (wall energy conservation transformation applies LOW-E midheaven glass glass pastes transformations and so on membrane uses plate pile technology and so on) the central air conditioning energy conservation transformation technology (cooling tower energy conservation transformation ice accumulation of cold technology source water source air conditioning technology Leng Meibeng cooled pump transformation and so on) three big prop energy conservation industry to be coquettish in respective domain each collar has won the global prestige and the oral traditions; The Group devotes for a long time to the new building materials the tidal current science and technology research the development passed the BSI IS09001 authentication becomes the world three big glass function membrane core manufacture manufacturer is the present global glass pastes one of membrane service industry largest scale enterprises.

ACER位于美丽的加拿大蒙特利尔市。是全球新型建材知名企业,集团在全世界范围内拥有 6400多名员工,以及数十家实力相当的亲密合作伙伴,为全球70多个国家提供一流服务。在探索企业国际化的发展过程中,旗下的余热余压回收利用建筑节能改造(墙体节能改造,应用LOW-E中空玻璃,玻璃贴膜等改造,采用支盘桩技术等),中央空调节能改造技术(冷却塔节能改造、冰蓄冷技术、地源水源空调技术、冷媒泵冷却泵改造等)三大支柱性节能型产业在各自领域各领风骚,赢得了全球性的声誉和口碑;集团公司长期致力于新型建材、潮流科技的研究、开发,通过了BSI的IS09001认证,成为世界三大玻璃功能膜核心制造厂商,是目前全球玻璃贴膜服务行业最具规模的企业之一。

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推荐网络例句

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。

The shamrock is the symbol of Ireland and of St.

三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。