无轨道的

For a continuous map of trees or graphs to itself, we show the properties that every isolated chain recurrent point is an eventually periodic point, and an isolated chain recurrent point which is not in the orbit of a critical point and has no critical point in its orbit is a periodic point.

第三章主要讨论一些特殊连续统上连续自映射的孤立链回归点与最终周期点之间的关系，证明了对树或图上连续自映射，孤立链回归点是最终周期的，且如孤立链回归点不在临界点的轨道中，也无临界点在其轨道中，则此点必为周期的。

Through the method of experts'investigation, to analyze the risk on this project and choose out the headstream of the risk 2. Through the method of classification, to disassemble this project 3. Through the method of simulation, to estimate the risk of investment 4. To provide the scheme to avoid and manage the risk All of these efforts made us realizing the features of this project and mastering the rule of risk. So we can complete the project within 1000 days, and create the miracle in the field of the construction on track traffic, with the features of the limited manager, the short term, the low cost, the high technology, the high quality and the perfect safety. It has been the successful nonesuch on the research of risk management art.

首先，采用专家调查法，对项目进行了系统的风险辨识，筛选了项目面临的风险源；第二，采用分级分类的办法对项目进行逐级分解；第三，采用模拟相结合的方法进行了投资风险估计；第四，提出回避风险方案和风险处置方案，从而使工程的建设者们全面的了解了项目的建设特点，把握了风险规律，把风险控制在合理的范围内，使工程能在1000天内顺利竣工通车，并以管理人员少、工期短、造价低、技术难度高、质量优良、安全无事故等特点，创造了中国乃至世界轨道轨道交通建设的奇迹，成为风险管理管理技术研究的又一成功典范。

Both motor car and each trailer of HST were modeled as a multi-rigid-body system with two suspensions, and LVT was modeled as an assembly of track segment elements with 24 degrees of freedom. The vertical vibration matrix equation of the system was established on the basis of the principle of the total potential energy with stationary value in elastic system dynamics and the rule of "set-in-right-position" for formulating system matrixes, and then Wilson-θ numerical integration method was used to solve the problem. The dynamic responses of the system were calculated when the train runs at the speed of 200 km/h. And the effects of vertical stiffness of rail fastener and block pad on vertical vibration responses of the system were investigated.

其原理是：将高速列车的动车和拖车模拟为具有二系悬挂的多刚体系统；将弹性支承块式无碴轨道模拟为具有24个自由度的轨段单元的集合；基于弹性系统动力学总势能不变值原理及形成系统矩阵的"对号入座"法则，建立此系统竖向振动矩阵方程，并采用Wilson-θ数值积分法求解，计算速度为200 km/h时此系统竖向动力响应，研究轨道刚度对此系统竖向振动响应的影响规律。

Some advice provide reference for the ongoing unballasted track on railway passenger dedicated line construction.

并提出了一些体会和建议，为正在建设的无砟轨道客运专线提供借鉴。

The unballasted track by the pile-plank structure is a relatively new structure.

桩板结构路基-无砟轨道结构是一种相对较新的结构。

An analysis method for vertical vibration of high-speed train and low vibration track system was proposed to study the dynamic performance of the system.

摘 要：为研究高速列车-弹性支承块式无碴轨道系统的动力学性能，提出一种竖向振动分析方法。

Research conclusions: As a structure of low embankment of soft weak subgrade, beamless slab can satisfy the requirements of ballast and ballastless tracks and can control the structure＇s settlement.

研究结论：无梁板桩柱作为软弱地基低矮路堤结构可以满足有碴或无碴轨道结构的要求，工程沉降达到可控，技术成熟，施工不必碾压路基，简化了施工环节，方便、环保、节约土地，它的推广应用必将具有良好的社会及经济效益。

In the field of spaceborne remote sensing, a geometric collinearity equation of pushbroom sensor with the Kepler parameters of the satellite orbit and the attitudes of sensor has been developed. Testing the sensor model on a SPOT-5 imagery, the planimetric accuracy of object positioning is 83.392m on the ground. According to the orbital dynamical model and the kinematics model of satellite attitude, an algorithm of extrapolative location is developed. Testing the algorithm on CBERS-2 high resolution satellite imageries of central China, when the depth of extrapolation is 300km, the planimetric precision is 53.555m including the measurement errors as well as the modeling error over than the 568m which is the planimetric precision of systematic rectification.

航天遥感方面，利用6个卫星轨道开普勒参数和3个传感器姿态建立了推扫式卫星遥感影像的严格构像方程，经对一景SPOT-5影像实施无地面控制对地目标定位获得了83.392m的平面精度；根据遥感卫星的运动规律，提出了卫星轨道参数、传感器姿态和扫描侧视角的外推算法，用于资源二号卫星影像的外推对地目标定位，当外推深度达300km时，目标定位精度不低于50m。

Hence, theoretically analyses on the transmission characteristics of digital jointless track circuit and design software are of great theoretical and practical value.

因此，对数字无绝缘轨道电路进行传输特性分析研究具有重要的理论意义和实用价值。

This paper gives an introduction to the construction technique of Germany Rheda non-gravel trackway whose foundation adopt continuous paving and pouring concrete base and concrete trough by using slip-form paver,Compared with the technique we have used for long time,which is supported by slot-ditch,the new construction technique gives US new thinking and direction on how to enhance mechanized degree and engineering quality.

介绍德国铁路土路基上枕式无碴轨道轨下基础采用滑模摊铺机连续摊铺混凝土底座和混凝土路槽的施工技术，并与我国长期施工实践所积累的较为成熟的轨排支撑架法技术相比较，对如何再提高机械化施工程度以及如何提高施工质量提出新的思路与方向。关键词：滑模摊铺机；枕式无碴轨道；混凝土底座；混凝土路槽

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。