模型车

First the math theory of machining simulation is studied, and the set structure of NC machining simulation system whose components, including time, input, output and so on, are defined. Hereby we set up the hierarchy structure, the logical structure, the static model and the dynamic model of simulation system. The construction method of sweep entity of cutter and rotation parts is researched, and their differential geometry invariants are calculated. NC code is unscrambled, and the recursion division arithmetic of time segment is put forward, which is the driven data of the movement or rotation parts. The CLDATA should be interference-free. To examine if there is interference between cutter flank and the work piece, an arithmetic that discussed the existence of intersecting curve between them is put forward. To examine if there is interference between two turrets, an arithmetic that discussed the existence of intersection set between two polygons is put forward.

首先研究加工过程仿真的数学基础，然后定义数控加工仿真系统的集合结构及时间集、输入集、输出集等概念，建立加工仿真的层次结构和逻辑结构，阐述双刀车削仿真系统的静态模型和动态模型建立方法，分析刀具扫描体和旋转部件扫描体的建立方法及其微分几何性质；研究NC代码解读技术和双刀加工时间段递归子分划技术，为驱动各仿真单元作数据准备；通过讨论后刀面和工件表面交线的存在性判断刀具后刀面与工件间是否干涉，通过求多边形的交集判断刀架与刀架是否干涉。

The main contents and contributions of the paper are summarized as follows:The matching technology between drum electromagnetic brake and vehicle is studied and the braking force distribution coefficient of the tractor and trailer is confirmed. According to the related standard, the mathematic model of the braking moment which the electromagnetic brake should provide has been ascertained using the matching theory. The matching technology of trailer train brake system has been introduced in the type selection and analysis of the brakes.

本文针对电磁制动器设计的关键技术进行研究，以建立电磁制动器集成设计平台为目标，主要开展了以下几个方面的研究内容：对汽车列车制动力匹配技术进行了研究，确定了牵引车和房车的制动力分配系数，依据相关标准运用制动器与整车性能相匹配的理论，建立了房车所需制动力矩的数学模型，用以对制动器进行选型设计，并给出了集成设计平台中整车匹配模块的算法流程图。

In consideration of the characters of solar radiant energy and inside structure of cars, obtains the optical parameters of window glazing and the interior materials by means of the electron multiplier phototube and colorimeter and theoretical analyses.

考虑太阳辐射和空调轿车车室结构的特点，采用光电倍增管和色度仪等实验手段，推导出车窗玻璃和结构材料的光学性能。采用蒙特卡罗法研究进入车室内的太阳辐射能量的再分配，即吸收、反射和透射等物理过程，编写了通用的计算软件，并以实际轿车空调车室模型作了数值计算。

According to the operation experience of the Schnabel car,the structure analysis model for the Schnabel on 380 t Schnabel car is set up,the boundary limiting conditions and loading conditions of the Schnabel are analysed comprehensively.

根据钳夹车运用经验，建立了380t钳夹车钳形梁结构分析模型，对钳形梁的边界约束条件和载荷工况进行了综合分析、处理。

The main research areas of this paper include:For simulation model of cyclist dummy, it is proposed that a combined custom modeling technique set up new cyclist dummy that adapts for two-wheeler collision accidents. The technique is achieved based on the analysis of modeling features of existing numerical dummy and the problems that occur when it is used to simulate the two-wheeler cyclists.

研究的主要方面包括：在两轮车骑车人仿真假人模型的研究方面，通过分析现有数值假人的建模特点和其用于对骑车人进行仿真模拟上存在的问题，根据本文研究的需要，提出组合式定制假人建模技术建立适合于两轮车碰撞事故研究的骑车人数值仿真假人。

Very many is the average man thought not the normal response, does not want to study, likes a person being in a daze, a person window-shops,a person is having the camera traveling, always thought a person is

是的，老师，我很爱收集车模型，特别是跑车，不知道是为什么，看见好看的车就会爱不释手，很想去拥有它，但是还没那能力。

Using the models, the author has also calculated the vibration response to high speed railway vehicles of three types travelling over simply-supported beam bridges with various span lengths respectively. Based on the analysis of the computation results, the concept of resonance velocity of a bridge under a high speed running vehicle is present, and it is pointed out that comparatively great vibration of bridges on high speed railways is caused by bridge resonance resulted from the static force pulsating. In a vehiclebridge coupling vibration system, the damping constant of the axle spring is the main factor affecting the response variable of bridge velocity resonance, and the influence of track irregularity on bridge vibration on high speed railways is rather smaller.

利用所建立的计算模型，计算了三种形式的高速铁路车辆通过各种跨度简支梁桥结构时的振动响应，对所得到的计算结果进行了详细的分析，提出了高速行车下桥梁共振速度的概念并指出高速铁路桥梁产生较大振动的原因是静力脉动引起桥梁共振造成的；通过研究车—桥耦合振动系统方程的参数后指出，在车—桥耦合振动系统中，车辆—系阻尼的大小是影响桥梁速度共振时响应大小的主要因素，轨道不平顺对高速铁路桥梁振动的影响较小。

Italian PIAGGIO company in on century 50\'s most classical most famous light cavalries motorcycle product, once because of "the Roman Holiday" the center miraculous glow one presently is all the rage the world at the movie, nowadays only has NEWRAY to obtain this section model the manufacture authorization, the extremely rare graceful modelling, the entire white, 1 to 6 ultra was great proportions, the entire vehicle completely is made by the zinc base alloy material quality, left side of trailing wheel Chu Wuxiang all might open, the steering handle might rotate, all wheels all are the activities, evaded including the trailing wheel shakes is hanging all is the genuine spring oh, entire Che Anyuan vehicle entire simulation manufacture, The ultra fine paint surface works, entire Che Touzhuo a Italy character and style is in sole possession of romantic breath, also does not lose the detail to decide all perfect principles!

意大利 PIAGGIO公司在上世纪50年代最经典最著名的轻骑摩托车产品，曾因在电影《罗马假日》中的灵光一现而风靡全世界，现今只有NEWRAY得到该款模型的制作授权，非常罕见的优雅造型，全白色，1比6超大比例，整车全部由锌合金材质制成，后轮左侧的储物箱都可打开，车把可转动，所有车轮都是活动的，连后轮避震悬挂都是真正的弹簧哦，整车按原车全仿真制造，超精致的漆面做工，全车透着一股意大利风情独有的浪漫气息，也不失细节决定一切的完美主义！

Based on the characters of taking-out and placing-in shunting on branch-shaped sidings, the mathematical model of TPS for all kinds of wagon flow in the case of several trains arriving successively in the railway station is built.

基于树枝形专用线取送车作业的特点，针对多次列车相继到达车站情况下各种车流到发方式的取送车问题建立统一的数学模型。

The company has already unveiled its new Evora 2+2 car, but rather than sitting still with this car, it will be preparing a number of variants of this model, as well as new models.

该公司已经推出了新的埃武拉2 +2车，但仍然不是坐在这个车，这将是准备了一些不同的模型，以及新车型。

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。