模型车

The aerostatics response analysis of the full-bridge was done using the three-component force coefficient.

进行了1：60缩尺模型试验，开展了桥面无车状态、桥面有车状态和施工状态下的75个试验工况节段模型测力试验研究，并利用获得的三分力系数进行了全桥静风响应分析。

Built up dimensional reference frame and vector equation of movement model of orthogonal turn-miling.

为了提高数控车铣的编程效率，论述了正交车铣运动的特征，同时通过对正交车铣运动过程的分析，建立了一个描述其运动的空间坐标系，从而建立了正交车铣运动模型的矢量方程。

This paper uses the ADAMS software to set up a dynamic model of tractor-trailer combination consisting of one tractor and five trailers with a total of 13DOF. The effects of drawbar length, articulation joint position on path following performance are investigated using parameter analysis method.

本文应用机械系统分析软件ADAMS建立了由一节牵引车和五节双轴转向拖车组成的汽车列车系统13个自由度的动力学模型，采用模型参数化分析方法，讨论了牵引杆长度、主车与拖车和拖车与拖车的铰接点位置对主车与拖车轨迹同辙性的影响。

By mixing the model of life cycle law and the fast prototype law in the course of systematic development, the system has been fully benefited by I-DEAS variable size driving. The passenger train (hard seat car, hard sleeping car, soft sleeping car, soft carriage) of common use was mutually designed by incorporating the parameter and computer graphics, the three-dimensional, level and section pictures were assigned automatically, the scheme design with parameter and automation was realized.

在系统的开发过程中采用了生命周期法和快速原型法的混合开发模型，充分利用了I—DEAS软件的变量化尺寸驱动特性，集参数化和计算机绘图于一体，通过对通用客车(硬座车、硬卧车、软卧车、软座车)进行交互设计，自动生成三维效果图和平面、断面布置图，实现了铁路客车方案设计的参数化设计与自动化设计。

Then it uses beam unit to analyze and calculate the simplified tripper steel structure model,compares the pre and post optimization models stress,displacem...

然后利用梁单元对简化的空间尾车钢结构模型进行有限元静力和模态分析计算，对优化前后2种模型的应力、位移、重量及基频进行了比较，从而进一步验证了对尾车钢结构进行拓朴优化的可行性和优化结果的合理性。

On the basis of the characters of taking-out and placing in shunting on actinoid private lines, the best schedule of taking-out and placing-in of wagons of several non through trains arriving at the railway station successively is analyzed. Collection and delivery shunting being treated as within one integrated system, a mathematical model is established with the objective to minimize the detention vehicle hours of wagons at a station.

基于放射形专用线取送车作业的特点，针对非直达车流取送车问题中，多列列车相继到达车站时，对如何确定合理的取送车顺序进行分析将取送车作业作为一个系统进行整体考虑，以货车在站停留的总车小时消耗最小为优化目标，建立数学模型。

Through coupling of computational car course 5 rank the Li Dai of the model is counted, got Li Dai counts the verdict of full order, make clear 5 rank the system that the model is strong coupling of course of a car, alternate through coordinate the system cannot solve Ou only.

通过计算车轨耦合五阶模型的李代数，得到了李代数满秩的结论，表明五阶模型是一个车轨强耦合的系统，仅通过坐标变换系统无法解耦。

According to horizontal vibration theory of beam of u- niform section,the kinetic model of the orthogonal turn-milling slender rod is presented,and according to the peculiarity of the turn-milling cutting force,the simplify cutting force model is presented.

根据等截面梁横向振动理论，建立了正交车铣加工细长杆的动力学模型，并根据车铣切削力的特点，建立了切削力的简化模型。

Rectangular and unstructured hybrid grids, re-normalization group k-ε turbulence model and discrete ordinates radiation model were adopt for the steady-state numerical calculation of air velocity filed and temperature filed, and obtained the distribution of air flow velocity and temperature in the passenger compartment.

采用矩形与非结构混合网格、RNGκ-ε两方程湍流模型、DO辐射模型对车室内的空气速度场及温度场进行了稳态数值模拟计算，获得了车室内空气流速及温度的分布情况。

Rare fine to the best remote control vehicle model, according to original vehicle 1 to 32 proportions fine, as slightly as a trademark, completely presses the original vehicle manufacture, the sparkling chrome-plating part, put in yours book shelf most appropriate only, the unique wristwatch infrared remote control operation, in the world the smallest remote control vehicle remote control, the ultra cruel wristwatch remote control, pressed on the wristwatch the button, could control this racing bicycle to the different direction advance, the backlash and the curve, but exchanged the ordinary vehicle mold chassis, turned an ordinary static vehicle mold, the replacement process extremely was also convenient, The entire screw organization, and has the tool oh, a vehicle actually has two uses ways, this it specialest place, the zinc base alloy +ABS engineering plastics material quality, the front of a train for the entire zinc base alloy metal manufacture, the front of a train and the oil pot might separate, the vehicle door may open, presses down on the wristwatch remote control the start key, the truck sends out immediately with the real vehicle same start thunders the sound, stopped when also had the braking sound, the ultra fine paint surface worked, the detail decided all perfect principles!

罕见的精细到极致的遥控车模型，按原车1比32比例精致，小到一个商标，全部按原车制作，闪闪发光的镀铬部件，放在您的书柜中最合适不过的了，独特的手表红外线遥控操纵，世界上最小的遥控车遥控器，超酷的手表遥控器，按动手表上的按钮，就能控制这台跑车向不同的方向前进、后退和转弯，而换上普通的车模底盘，就又变成了一部普通的静态车模了，更换的过程也极其方便，全螺丝机构，并配有工具哦，一部车却有两种使用方式，这就它最特别的地方了，锌合金+ABS工程塑料材质，车头为全锌合金金属制作，车头和油罐可分离，车门可开启，按下手表遥控器上的启动键，卡车立刻发出和真车一样的启动轰鸣声，停车时还有刹车声，超精致的漆面做工，细节决定一切的完美主义！

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。