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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。

In this paper,the difficulty of route lookup is analyzed,and a survey of all kinds of lookup algorithms,which are compared indetail,is also presented.At last,some challenging open problems are identified.

分析了路由查找问题及其难点,全面综述了各种查找算法,并对它们进行了详细的分析和比较,最后指出了进一步的研究方向。

Based on an analysis of comparative advantage of agricultural products for both China and India, this paper measures the Sino-India trade relations of agricultural products and locates products that possess either competitive or compatible nature between the two countries, with a focus on exploring whether there exists cooperative foundations for them.

本研究在对中印各自农产品贸易比较优势进行分析的基础上,判定中印农产品的贸易关系并确定两国存在竞争性和互补性的农产品,以探讨两国农产品贸易的合作基础,进而分析两国具有较大贸易拓展空间的农产品品种,并深入探讨了两国农产品贸易合作潜力的大小,最后提出相应的政策建议。

The first part is the author"s special viewpoint about the thinking ability, such as the meaning, the essence, the classification and the operating process. The second part describes the relations between developing thinking ability and the urgent needs of country, society and individual development from five aspects. The third part is about the connection and differences of thinking ability, intelligence, ability, creativity and the constructivism theory. The forth part analyses the teachers" nine injudicious actions that will influence the students" thinking ability. The fifth part discusses the students" seven bad learning behaviors that will cause the degradation of thinking ability. The sixth part is about the unsuitable policies or actions adopted by school, society or family that will cause the degradation of the students" thinking ability. The seventh part discusses the countermeasures that can maintain and develop the students" thinking ability. The eighth part brings forward twelve countermeasures that can exercise the student"s thinking ability in chemistry teaching. The last part gives a brief account of the task.The author expects that this article can enhance the coteries" attention to the students thinking ability.

本文共分九个部分,第一部分对思考力的含义及其本质、分类和运行过程提出了作者的观点;第二部分从五个方面阐述培养思考力与国家、社会、个人发展的迫切需要之间的关系;第三部分简要叙述了思考力、智力、能力、创造力与建构主义理论之间的联系和区别;第四部分分析了教师的九种不当行为对学生思考力水平的影响;第五部分分析了学生的七种不良学习行为导致思考力下降的因素;第六部分叙述了学校、社会和家庭的不当政策或行为导致学生思考力水平下降的原因;第七部分着重从八个方面阐述了保持和发展学生思考力的对策;第八部分提出了在化学教学中训练学生思考力的十二种对策;最后在结束语中对本课题主要观点进行了概述,以期望引起教育界同仁对学生思考力培养的重视。

Relationships between the instantaneous emission / fuel consumption rate and the instantaneous speed/acceleration are first analyzed. Then, the emissions for a variety of vehicle types in the network are analyzed. Finally, the developed platform is used to evaluate the impact of alternative traffic control and management strategies for two scenarios.

本文首先建立了车辆的瞬间尾气排放率、燃料消耗率与瞬时速度、加速度之间的关系;然后,对研究路网的各种车型的尾气排放量进行分析和计算;最后,通过两个假设方案,对不同的交通管理与控制策略对于尾气排放的影响进行分析。

First, it begins with the study of the centralized CFAR detection with multiple sensors. The non-CFAR problem is analyzed; the necessity for local CFAR processing is established. The effective local CFAR processing scheme is proposed, i.e. the local test statistic. The upper limit of the optimal performance is proved for the distributed CFAR detection based on LTS. Then, the new schemes based on LTS are analyzed in condition of signal pulse, and then the analysis is expanded to the case of multiple pulses. Next, the feedback mechanism is introduced. At last, the invariant test is used to reveal the essence of CFAR processing. It explains the necessity of local CFAR processing in the distributed CFAR detection at a higher level.

本文深入研究了这方面的问题,首先从多传感器集中式 CFAR 检测入手,分析其存在的非 CFAR 问题,论述局部 CFAR 处理的必要性,提出有效的局部 CFAR 处理方法:局部检测统计量,证明基于局部检测统计量的分布式 CFAR 检测的最优性能上限,分析基于局部检测统计量的新方案在单脉冲条件下的性能,并且进一步拓展到多脉冲非相干积累的情况,然后引入反馈机制,最后利用不变检验的概念揭示 CFAR 处理的机理,从更高的层次上解释分布式 CFAR 检测做局部 CFAR 处理的必要性。

Finally, programs for computing of Tubesheet, hopper, frame, joist are developed, and designing of Tubesheet, optimizing of hopper, aseismatic performance of joist are analyzed.

最后利用开发的花板、灰斗、框架和节点分析模块,分析了花板的设计方法、灰斗的优化措施、节点的抗震性能。

A sample of 480 Chinese adolescents and 115 juvie aged 13-18 was investigated with series of Chinese transitions of measures, including the revised Ego Identity Status Questionnaire(EOMEIS-2) and Adolescent's Social Adaptive Behaviors Questionnaire. Results indica ted:1. For the adolescents, the distributions of ego identity statuses, whether in the ideological, interpersonal or total domain, are unbalanced.

首先,通过问卷预测,对问卷进行修订和信效度的检验,再以修订后的问卷正式施测,然后运用卡方检验和方差分析探讨同一性状态和社会适应性行为的发展特征,最后通过方差分析考察同一性状态和社会适应性行为的各个层面的关系。

At the same time combined with indoor maximum dry density test,this paper discusses the possibility that rock-filling construction quantity .Then data of densification quantity examination under the condition ofdifferent filling material.densification machinery.densification parameter and lay-down thickness are collected as the analytic object. On the basis of making a statistical analysis of experiment data ,supervisory standard and assessment method of settlement difference and settlement ratio that adopted to examine rock-filling embankment construction quantity are put forward systematically At last carrying on settlement observation tests of rock-filling embankment in different construction stage in different layer ,the dependability of assessment method is validated.

同时结合室内最大干密度试验,讨论了表面沉降法作为填石路基施工质量检测手段的可行性和可靠性;然后通过汇总不同填料、不同压实机械、不同压实参数和不同摊铺厚度条件下的压实质量检测数据作为分析对象,在对试验数据进行了统计分析的基础上,较为系统地提出了以沉降沉降差及沉降率作为填石路基施工质量检测指标的评定方法和相应的管理标准值;最后通过对填石路基试验段进行不同填筑时期不同层位的沉降观测试验,验证了评定方法的可靠性。

First of all, this study will be multi-walled carbon nanotubes by chemical oxidation process purified so it can be modified to deal with than the purification of purity before the modified 5 wt%, more than 1.89 times the surface area to increase the surface potential decrease of about 10 ~ 20 mV and the surface functional base (-COOH and-OH) to increase 1.45 times, and then the control technology of electroless preparation parameters include: analysis of plating time, plating analysis of temperature, metal ions in solution than the (Fe2+/ Ni2+), bath pH and the added value of dispersion Agent and other research towards Fe-Ni particles to increase the iron content and Fe-Ni particles spread in the MWCNT upper fixed targets,the results found that when the parameters for the preparation of 50 ℃, pH10, do not add dispersant, metal ions than the solution (Fe2 +/ Ni2 +) 7, the highest iron content can be Fe = 40.55 at%(flat iron content 111.17 mg / g) of nanocomposites Fe-Ni/CNT, then for a series of the nature of its analysis, the final evaluation Fe-Ni/CNT nanocomposites were processed on the effectiveness of the application of mixed pollutants, the results showed that in 120 minutes at the same time when Adsorption of heavy metal ions lead nitrate 10 ppm, selenium heavy metal ion degradation of 1 ppm and orange azo dye AO7 50 ppm standard of effluents, and after a total Fe-Ni nano-particles to SEM / EDS analysis of more than 50% still remaining.

本研究首先将多壁奈米碳管以化学氧化法做纯化改质处理能使其纯度较纯化改质前提高5 wt%、比表面积提高1.89倍、表面电位下降约10~20 mV以及表面官能基提高1.45倍,再控制无电镀技术之制备参数包括:析镀时间、析镀温度,镀液中金属离子比(Fe2+/Ni2+)、镀液pH值及是否添加分散剂等,研究朝提高Fe-Ni粒子的含铁量与Fe-Ni粒子散布固定在MWCNT上等目标进行,研究结果发现当制备参数为50 ℃、pH10、不添加分散剂、镀液金属离子比(Fe2+/Ni2+)7时,可得到最高铁含量Fe = 40.55 at%(单位铁含量111.17 mg/g)之奈米复合材料Fe-Ni/CNT,接著对其作一系列性质分析,最后评估奈米复合材料Fe-Ni/CNT对共处理混合污染物之应用效益,结果显示其在120分钟时能够同时吸附重金属硝酸铅离子10 ppm、重金属硒酸根离子1 ppm及降解偶氮橘色染料AO7 50 ppm达放流水标准,且共处理后奈米Fe-Ni粒子以SEM/EDS分析仍剩余50 %以上。

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推荐网络例句

What would he tell Judith and the children?

他将怎样告诉朱迪丝和孩子们呢?

I this is at that time, the opinion with peacockish true girl is full of in a heart.

这就是当时的我,一个心中布满虚荣的女孩子真实的想法。

Oh, and I bought myself a new laptop," he said."

哦,我还给我自己买了一个新笔记本"他说。"