In the paper , firstly , the tache of position ' s check has been discussed , then the measuring theory and transition of signal for encoder , which is a high precision measurement are described and the interpolator circuitry is also put forward 文中首先对测控系统的位置检测环节进行了论述,讨论了高精度的检测元件? ?光栅的测量原理及其信号转换方法,并设计了细分接口电路。
Singularity mainly improve on its application way , and bring forward a new count means of num about pels part - area . fourthly , to recognize target , is to train target character samples imput to interpolator , then test using testing samples to get recognition result 然后是对目标进行识别,将目标特征样本输入到分类器中进行训练,再运用测试样本进行测试,得到了良好的识别结果。
Objected to the character of modulation domain , this article mainly discuss the key technique such as analog interpolator which can improve the distinguish ratio and zero dead time counter which can prevent the loss of useful message during two sample gates 如:模拟内插技术,使之适应系统的整体指标的要求;无间歇计数技术,它不仅能保持两次测量之间的关系,而且还可以保证不会在两次取样之间丢失测量信息。
Comparing with si ( sin ( x ) / x ) interpolator , cubic interpolator with low pass filter , and winner interpolator in 16qam ofdm system both in mean square error and bit error rate without encoding , the results of the method proposed by this thesis show that the performance is better than si interpolator and cubic interpolator with low pass filter , and close to the winner interpolator but the complexity is much lower than the latter 在16qamofdm系统中,将其与带低通滤波器的si ( sin ( x ) / x )插值法、 cubic插值法和winner插值法进行了信道估计的均方误差和无编码的误比特率的仿真结果进行了比较。结果表明,本方法的估计性能优于si和cubic插值法,接近优化的winner插值法,但其计算复杂度与winner插值法相比却大大降低。
In terms of their frequency responses , the best choices for medical image interpolation : the 6 6 blackman - harris windowed sinc interpolator , and the c2 - continuous cubic kernels with 6 and 8 supporting point . in terms of the quantitative error and evaluations , in practice the best choice is the cubic kernel with 6 supporting points 根据各插值核的频率响应特性,更好的是6 6的blackman - harris窗和二阶导数连续的6 6和8 8的三次核;从实现效率和放大效果上看,实际中理想的选择是6 6的三次核。
In two axis system , a circle interpolator is designed , and a new method based on ga - neural networks is proposed to adjust pid parameters online to reduce the tracking error . then , an integrated controller based on rbf neural network ( rbfnn ) is designed to reduce the contouring error of the two axis . experimental results show that the proposed integrated controller significantly improved accuracy in both tracking and contouring 对于双轴系统设计了一个轨迹为圆的插补器,采用基于遗传算法?神经网络的在线pid参数调整算法,减小了系统的跟踪误差,并分析双轴之间的轮廓误差,设计出基于rbf神经网络的综合控制器,经过仿真实验证明,本文采用的综合控制器能有效地减小系统的跟踪误差和轮廓误差,提高系统的控制精度。
Fpga and dvb standard are introduced firstly , dvb - c standard and composition of its system are analyzed completely , development of modulator structure and dvb - c digital modulator composition are presented , more over , analysis of respective modular are given . then , principle of dvb - c digital modulator system are presented , they are error control technique 、 mqam 、 nyquist rule and root raised cosine filter 、 window design method for fir filter 、 multi - rate signal processing ( integer interpolating , conversion of fractional sampling , equal conversion of net structure , polyphase structure for filter , poly - phase structure for interpolator , multi - stage implementation of samplying conversion ) 、 distrubited algorithm 、 cic filter 、 dds 、 cordic algorithm 接着,专门利用一个章节阐述了dvb - c前端调制系统原理,他们了差错控制技术、多进制调制( mqam ) 、 nyquist准则与平方根升余弦滤波器、有限冲击响应滤波器的窗函数设计法、多抽样率信号处理包括(整数倍内插原理、分数倍抽样率转换、网络结构的等效结构、滤波器的多相表示、内插器的多相表示、抽样率转换的多级实现) 、分布式算法、 cic滤波器、直接数字频率合成( dds ) 、 cordic算法。
3 > it sets up fuzzy interpolator for time limit for an item - total cost connection , which is effected by fuzzy influencing factor . by the way of sorting , it can weaken gray degree modeling historical data , increase whiten - grade , weaken disturbance , boost up rules , in favor of improvement of projection precision 对具有模糊影响因素影响的项目工期?总成本关系建立模糊分类器,通过分类,使建模历史数据灰度减弱,白化度增强,弱化干扰,增强规律,有利于华北电力大学博士学位论文预测精度的提高。