With the method of the coorinate transformation , the coordinate calculation equation of the arbitrary point of the top - class highway in the control coordinate system is deduced and the detailed point of the plane curve will set out accurately and quickly in the arbitrary control point by the means of pc - e500 computer program 摘要介绍通过坐标变换的方法导出高等级公路中平曲线上任意点在控制坐标系中的坐标计算公式，并配合pc - e500计算机计算程序，从而在任意控制点上采用极坐标法快捷、准确地放样平曲线上的详细点。
Due to complicated continuous helicopter models and a wide range of constraints , numerical solutions on a mainframe computer have to take a long time . for a given set of initial helicopter states and flight parameters , optimal solutions are fitted by a fourier series . the coefficients of the fourier approximations are then interpolated as functions built by three - layer bp network with inputs of initial flight states and parameters 最后,由于直升机数学模型的复杂性,这给实时优化计算带来很大困难,本文研究了地面计算机计算的最优轨迹如何在机载计算机上实时显示,对飞行员的操纵提供参考,即把不同初始条件得到的最优轨迹曲线进行傅立叶部分级数化,得到傅立叶系数,选取合适初始条件作为变量,对这些最优轨迹曲线进行拟和,建立bp神经网络预测模型。
This system captures the rack position signal and rotate speed signal of the fuel injection pump , and calculates the circulating fuel injection quantity by programming the computer . then the computer is programmed to control the daq board to generate a certain width pulse . finally , controlled by the pulse , the alcohol injection system injects a certain quantity alcohol into inlet manifold according to a setting diesel / alcohol proportion 该系统采用了在labview平台上开发的pc总线?插卡式虚拟仪器系统，系统通过采集喷油泵的供油拉杆位置信号和转速信号，利用计算机计算得出柴油的循环喷油量，再根据程序设定的柴油/酒精比例控制数据采集卡发出一定宽度的脉冲，控制低压酒精喷射系统按比例将酒精喷入进气歧管。
Abstract : a method to estimate error of measureing electrical power for nonsinusoidal ac with intelligent instrument is presented in this paper . it is useful to ac circuit controlled by scr . using this method and calculating by computer , the errors of power and voltage and current can be estimated accurately 文摘:介绍了估算智能瓦特表测量非正弦交流电功率误差的方法，它适用于各类晶闸管控制的非正弦交流电路.采用这一方法并用计算机计算，可较准确的算出电功率、电压和电流的误差
