查询词典 in course of time

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。

Producted RF and CRF aerogels by process of sol-gel technics, dynamic-exchange, CO2 supercritical drying, and procedural increase in temperature carbonization methods, which have eximious capability and nanometer network structure; Systemic analysis various factors which effect gel course, such as ratio of reactants and the dosage of catalyst, and probed into the better experiments conditions(the concentration of resorcinol and formaldehyde is more than 2% and the value of R/C is between 50 and 300); During gel course , primary investigated the viscosity curve and particle size distribution of sol-solution, and analyzed the reason of catalyst dosage effects particle size of gel, and confirmed that the up-growth of gel follows the theory of " polymerize increase ".The experiment results indicated that ultrasonic with unvarying temperature disposal shortened gel time and optimized quality of gels, and the factors of ultrasonic effect gel reaction velocity were analyzed; Prepared organic aerogels using compounds of resorcin and hydroquinone substitute resorcinol reacts with formaldehyde the first time, and also optimized the proportion of resorcinol and hydroquinone (the proportion of hydroquinone in 10%～40%).

采用溶胶-凝胶工艺结合动态溶剂交换、CO2超临界流体干燥与程序升温碳化方法制备出性能优良、具有纳米网络结构的RF与CRF气凝胶；深入研究了反应物配比催化剂用量等条件对凝胶过程的影响，得到了较佳的RF凝胶制备条件(RF浓度应大于2%，R/C值取50～300)；初步研究了凝胶过程中的粘度、粒径变化情况，分析了催化剂用量影响凝胶中粒子尺度的原因，在实验上印证了凝胶生长遵循"聚增长"的理论；通过引入超声波改进了RF气凝胶的制备工艺，缩短了凝胶反应时间，提高了凝胶品质，并探讨了超声波促进RF凝胶反应作用的原因；首次用对苯二酚与间苯二酚复配制备了混合有机气凝胶，优化出复配比(对苯二酚含量为10%～40%)。2。

But programs set, time of course, amount of curriculum, teaching condition, and teaching form are still insufficient.4The reasons why other universities and colleges do not set elective physical education course are mainly due to leaders" consciousness, quantity and quality of physical education teachers, the field and equipment.5The reform and development of elective physical education course in universities and colleges should incarnate the guideline "health first. people oriented". Teaching content should be pertinent, scientific, arranged, and systematic, so as to build up a teaching content system combined theory, skills and abilities. Set programs on base of students" choice, at the same time, give attention to the requirement of social development and students" interest, and make differential treatment according to gender. The classroom teaching should be sportful, joyful, and successful. The organizing of course could be mutual choice, compensating service, both in and out classroom. The score could be graded synthetically assess knowledge, innovation, and effect.6Strengthening the management to elective physical education course, improving teachers" comprehensive quality, making full use of fields and stadiums are all supporting conditions for the development of elective physical education course.

但是开设的项目、开课的时间、教学时数、教学条件、教学组织形式还难以满足学生学习和掌握知识和技能的需要。4、未开设公共体育选修课的高校其主要原因与领导的认识程度、体育教师的数量和质量、体育场地器材等有关。5、高校公共体育选修课的改革发展应体现&健康第一、以人为本&的指导思想：教学内容突出针对性、科学性、层次性、系统性，构建理论、运动技能、能力培养相结合的内容结构体系；运动项目设置以大学生对体育的选择性为基本前提，同时兼顾社会发展的需要和学生兴趣的需要，注重性别差异与因材施教；教学方法力求教懂、教会，体现课堂教学的娱乐性、快乐感和成功的喜悦：教学组织实施双项选择、有偿服务、课内课外相结合等多种形式；学习成绩实施知识+创新+效果的综合考核评价方法。6、加强公共体育选修课动态管理，提高教师综合素质，挖掘现有体育场馆设施的潜力，充分提高利用率是公共体育选修课改革发展的基本保障条件。

Fundamental to modern cosmology is the well-accepted theory of the big bang , wherein our universe began at a single point in time, and thereafter expanded over the course of 13.7 Gyr to its present condition.

现代宇宙学的基本是公认的理论，宇宙大爆炸，其中我们的宇宙开始于一个单一的时间点，并在其后扩大的过程中13.7 Gyr其现状。

I did not become one of those casualties in that particular case. Fate, foreseeing, as I understand, the probable course of events, made a firm decision at that time to transfer me from my post as a tank's driver/mechanic to another, less deadly, branch of service. ASAP. At any cost.

我认为&命运&预见到了事情以后的进程，当时做出了坚决的决定：不计一切代价，把我从坦克驾驶员兼机械师的位置上转到危险性较小的兵种——火箭炮部队。

Result:The psychopaths who have long course of disease and stay long time in hospital are of more serious decline degree.

结果 ：病程和住院时间长的患者衰退程度越严重。

A theoretical sun that moves along the celestial equator at a constant speed and completes its annual course in the same amount of time the ''.

理论中以不变的速度在天赤道上和''。

Later came the rivalry with Laver. Only during that period of time in the early '60s did Rosewall hold the throne by himself; over the course of his career, he was barred from 45 majors.

后来他又进入了与拉沃尔之间的王者竞争，只有在 60年代初，他才拥有了属于自己的时代，纵观他的职业生涯，他共45次被大满贯赛所拒绝。

"It's a very exciting time," says Colin Renfrew, a professor of archaeology at the University of Cambridge."In the next 10 years the whole course of early human history is going to become very much dearer."

&那该是一个多么令人兴奋激动的时刻，&剑桥大学考古学教授柯林·任弗瑞说，&在未来的l0年内，早期人类史的全部过程将会变得非常清楚。&

This was the last time that the resourceful Dr. Goebbels succeeded in influencing the strategic course of the war by propaganda bluff

这是诡计多端的戈培尔博士最后的一次以他的恫吓宣传成功地影响了战争的战略方针。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！