查询词典 in the 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。

The mathematics teachers in high schools are not only the guarantee of the smooth implement of mathematics course standard but also an executant of the foundation course reform .But a big margin exists between the roles of the mathematics teachers in high schools of the course system and the expectation of the new course. So it is very necessary to relocate the role of the mathematics teachers in the new course.

而中学数学教师不仅是数学课程标准顺利实施的保障者，同时又是基础教育改革的实践者，但是现行课程体系下中学数学教师的角色形象与新课程的期望之间存在着较大的差距，因此重新定位中学数学教师在新课程中的角色是非常必要的。

By test the function of network enroll, to browse course information, reselect course, course inquiry, publish elective course list, modify user's data and justify student's elective course in the system are implemented.

经过测试，该系统实现了网上报名、浏览课程信息、课程重选、课程查询、选课名单公布、修改用户资料、调整学生选课等功能，使学生可以方便地在校园网上进行网上选课。

To in boat letter this kinds of situation, not divide stage course project and for setting up on the each period of stage there aren't thought , stage of control goal, this text has proposed the control goal model of the quality of stage of course of development based on milestone innovativly, model this divide course that information system develop into feasibility analyse , encode , integrate , is it wait for 9 stages to test, and has confirmed the control goal of quality for each stage , has set up two milestones of quality control , navigate letter course stage that information system develop row , is it have achievement may be examined each period of stage to make, a quality goal is controlled , avoid developing the transparency of course and quality control defect not high of visuality like this.

针对中航信的这种情况，受工程项目对过程进行阶段划分并为每个阶段设立阶段控制目标的思想启发，本文创新性地提出了基于里程碑的开发过程阶段质量控制目标模型，该模型将信息系统开发的过程划分为可行性分析、编码、集成、测试等9个阶段，并为每个阶段确定了质量控制目标，设立了两个质量管理的里程碑，将中航信信息系统开发的过程阶段划，使每个阶段都有成果可以检验，都有质量目标进行控制，这样就避免了开发过程透明度和可视性不高的质量管理缺陷。

We divided the web-based biology course in the normal university to three types: depictive course, quantity course and experimental course; take some assumptions and suggestions to the design of the different web-based course, and illustrate by example.

根据高等师范院校生物系所设置的生物学课程内容的不同特点和表现方式，可将它们划分为三类：描述类课程、数量类课程和实验类课程；对不同类型网络课程的设计制作提出了设想和建议，并举例加以阐述。

In the idea of math teacher's education specialty, I put forward the instructional thought like"adequate to theory","attach importance to practice","system innovation"and"literacy standard", improve the structure of curriculum on the curriculum system construction of math teacher's education specialty, promote the character of teacher specialization, enhance the integration of general course, protrude the literacy of teacher specialization, reduce math specialized course, promote the function of"Educational Academy", regrade two kind educational course, strengthen thought integration, construct course modality of"Subject Amalgamation", unfold the summary of course structure and proportion of math teacher's education specialty. In the integration of curriculum and teaching model, according to the different kind of curriculum nature and learning stage of teacher's education specialty, I think there are three leading type to teaching model and learning stage, that is, participating teaching and meaningful receptive learning, eliciting teaching method and research study, case based teaching and reflective learning, and put forward operability suggestions to teaching practice.

在数学教师教育专业理念上，提出了&理论够用&、&实践为重&&体系创新&和&素养本位&的指导思想；在数学教师教育专业课程体系构建上，提出优化课程结构，提升教师专业化品性；加强通识课程统整，突出教师专业化素养；精减数学学科专业课，并增进&教育学术性&功能；精选两类教育类课程，强化统整思想，并构建出&学科融合&式的课程样态，展现了数学教师教育专业课程结构、比例的概略性图谱；在课程与教学模式整合问题上，笔者提出了按照教师教育专业学生学习的课程属性和学习阶段不同，形成三个主导型教学模式与学习方式，即参与式教学与有意义接受学习、启发性教学和研究性学习、案例式教学与反思性学习，并对对教育实习提出具有操作性的建议。

Risk management can be divided into five parts, these five parts are respectively: The risk of turning uncertainty into essential task that the risk is stated discerns the course, the risk changing into being arranged in the order of PRI tabulates the risk analysis course of the necessary task to state the risk, will tabulate and change the definition risk of the task needed in order to tackle the plan in risk to plan the course according to the risk that PRI will be arranged , monitor the risk state and give notice to start the risk and tackle the risk that take action and follow the course, with carry out the action plan of the risk, the risk in order to drop the risk to the task that the acceptable degree needs to finish deals with the course.

风险管理可被划分为五个部分，这五个部分分别是：将不确定性转化为风险陈述的必要任务的风险识别过程，将风险陈述转变为按优先级顺序排列的风险列表所需的任务的风险分析过程，将按优先级排列的风险列表转变为风险应对计划所需要的任务的定义风险计划过程，监视风险状态以及发出通知启动风险应对行动的风险跟踪过程，和执行风险行动计划，以求将风险降至可接受程度所需完成的任务的风险应对过程。

By describing Pythagorean theorem, the first time-space view explain the plane-line thought which impacts human's thinking manner; the second time-space view is absolute time-space theory of Newton and three-dimensions space-time view intersected by space-time; the third space-time view is curve space-time view which is generated from Einsteinian relative theory. The fourth space-time view is the directional, irreversible entropy time-space thought; the fifth time-space view is dense time-space view of cracked fractal generated from chaos-fractal theory.

第一时空观是通过对勾股定理的描述来说明影响人们思维方式的平直时空观；第二时空观是牛顿的绝对时空理论，是时空分割的立体三维时空观；第三时空观是爱因斯坦的相对论理论所带来的弯曲时空观；第四时空观是具有方向不可逆的熵时空观；第五时空观是混沌与分形理论所带来的破碎分形的稠时空观。

Then thedistribution of the students during the period is analyzed and thealgorithm is proposed according to the size of the total students sample.Finally based on the research above, a modified dynamic probabilitydistribution algorithm is proposed to meet the the real-time and equitydemand of the course-selection system. Compared with the knownalgorithms, this algorithm can put in practice real-time course-selection.At the same time the anticipator can select the course with the sameprobability.

本文首先对已有的选课算法进行了比较研究，随后对选课人数随时间的分布进行了分析，并进行相关算法研究，按照选课样本的大小提出了相应的算法；最后综合上述算法，提出了一种改进的基于概率动态分布的选课算法思想，使得整个选课过程中，实时性与概率动态分布有了很好的结合与体现，既实现了实时选课，又能后使得参选人尽可能的拥有相等的机会(即实现选课过程中的相对公平合理性)选中某个课堂。

A ship course controller is designed for Norrbin nonlinear ship mathematical model with matching uncertainty. Combining the backstepping algorithm with the nonlinear damping algorithm to design controller, the nonlinear damping is used to cancel the uncertainty. The integral item is introduced in the design to improve the performance of the controller. Now, general ships can only use the electric gyrocompass to measure the course angle, but they have no equipments to measure the angular velocity, so in this article another ship course controller of output feedback is designed for Norrbin nonlinear ship, firstly the angular velocity is estimated by the observer and then the ship course controller is designed.

本文基于含有匹配不确定项的Norrbin非线性船舶数学模型，将backstepping算法和非线性阻尼算法相结合设计船舶航向控制器，利用非线性阻尼来抵消系统的不确定项，同时为了更好地改善系统的性能，在设计过程中引入了积分项；由于目前一般船舶只有电罗经用于测量船舶的航向角，还没有测量船舶航向角速度的设备，因此，针对Norrbin非线性船舶模型设计了一种输出反馈控制器，首先利用观测器对船舶航向角速度进行估计，然后再设计船舶航向控制器。

The network space is the typical form of abstract space when it comes to the digital stage.

网络空间是抽象空间数字化阶段的典型形式。

The Notarial System,as the system of judicial certification in our country,is both the constructor and the defender of social credit system,It has its special value and function in the social honesty.

公证制度作为我国司法证明制度，既是社会信用体系的建设者，同时也是社会信用的捍卫者，在诚信中有其特殊的价值和功能。