矢量和

• According to the relationship of the angle of the maximum torque and the q axis , the reluctance torque for salient pmsm is made full use of and the sator current amplitude is reduced by a large percentage , so that the system robustness is greatly increased . at the speed loop , this paper presents a single value model algorithmic control strategy which is the simplied form of normal model algorithmic control and has less computation work than the latter , so the real - time performance is very good
  对于嵌入式pmsm ，根据在电流幅值一定的条件下最大输出转矩与(为等效电流矢量和q轴之间的相位角)之间的关系，将磁阻转矩转换为输出转矩从而提高了输出转矩，改善了系统的控制性能；在速度环采用单步模型算法控制，其计算量比较少，提高了系统的实时性和鲁棒性。
• In order to optimize the modulation performance , the relationships between the modulation signals ( include fundamental signals and zero - sequence signal ) and space vectors , between the modulation signals and space - vector sectors were discussed , then three kinds of optimal switching pattern of space - vector modulation are established
  文章首先从研究svpwm调制中零序信号与零电压矢量和非零电压矢量之间的关系这一独特角度出发，探讨了svpwm的优化调制方法，找出了三种开关损耗小、适用于高频化逆变器的优化开关模式。
• The carrier wave is modulated directly by the baseband signal at several frequency point in l band and s band . firstly , this paper clarifies the theory of i / q modulation , elaborates evm and acpl , and analyzes the effect of amplitude and phase unbalance and dc offset on evm . secondly we review the basic principle of phase locked loop and it ’ s composing parts , including the basic conception and design method of pll frequency synthesizer , especially introduce the charge pump pll frequency synthesizer in detail
  首先,在阐述i / q正交调制基本原理的基础上,通过对误差矢量和邻近信道功率泄漏的详细分析,定性、定量地讨论了各种非理想电路因素(如相位不平衡、幅度不平衡、直流偏差等)对调制器性能的影响;其次,介绍了锁相环的工作原理和基本组成部分,包括锁相环的设计和环路滤波器的设计,特别详述了电荷泵锁相频率源;第三,介绍了采用直接调制技术模拟卫星信号的射频前端的设计;最后,对整个直接射频调制系统进行测试,结果基本上达到了课题要求。
• The main work completed in the paper is listed as following : 1 . image function acquisition - , 2 . read bmp files by dib format ; 3 . drawing gray scale histogram ; 4 . choose a optimum threshold and make gray image become binary image - , s . find image ' s contour points by making inner points become empty and apply template matching on the contour points ; 6 . transform the object ' s beginning points ( pixel point ) to the ones in the image coordinate and the positions of in the corresponding three dimensions ; 7 . compute the position vector and the normal vector of the object
  选择一个最佳阕值，把灰度图像进行二值化处理； 5用掏空内部点法，找到图像的轮廓点，然后在轮廓点上进行模板匹配； 6把输出的目标物开始点(像素点)转化成图像坐标系中的点和对应的三维空间的坐标位置； 7计算目标物的位置矢量和法向矢量，根据机器人抓取面的法向矢量，找到机器人要抓取的平面； 8
• As an implementing method of multi - carrier modulation ( mcm ) , discrete multi - tone ( dmt ) modulation uses inverse discrete fourier transform ( idft ) vector as its modulating vector , and discrete " fourier transibrm ( dft ) vector as its demodulating vector , and the process of modulating and demodulating can be realized by using their fast calculating method
  作为多载波调制的一种实现形式，离散多音频( dmt )调制分别采用逆傅立叶变换矢量和傅立叶变换矢量作为调制矢量和解调矢量，从而调制和解调过程可以利用这两种变换的快速算法实现。
• First , in chapter 2 block - based stereo video coding technologies are researched . based on the analyzing of the constraints of disparity distribution and corrections among disparity vectors as well as corrections between motion vectors and disparity vectors , fast algorithms for disparity estimation are proposed . experimental results show the proposed algorithms are efficient
  首先在第二章研究了基于块的立体视频编码技术，重点分析了立体视频中视差的特点及其分布特性，研究了视差矢量和运动矢量之间的相关性，在此基础上给出了视差估计的快速算法，进行了实验测试，实验结果显示快速算法有很强的实用性，这是本文的一个创新点。
• Compared with the traditional pixel domain transcoding , our transcoding scheme not only avoids the dct and idct operations but also avoids computation - expensive motion estimation by reusing the motion information in the original hdtv stream . the transcoding system is realized on pc with c language , and optimized with sse2 instructions and intel ’ s software development tools
  与传统的像素域转码相比, dct域转码不仅避免了dct 、 idct运算,还通过重用输入hdtv码流中的运动信息直接构造sdtv的运动矢量和宏块模式,避免了运算量极大的运动估计过程,有利于实时转码的实现。
• The gps pseudorang observation equation and carrier phase observation equation are constructed and linearized . the lambda is regarded as a more effective algorithm for realizing arof ( ambiguity resolution on the fly ) after analyzing and comparing a lot of gps integer ambiguity resolution algorithms . the integer least squares estimation of the lambda is analyzed , and the result shows that the key process of integer least squares estimation is gps ambiguity decorrelation
  3 )利用马尔柯夫估计，推导了gps整周模糊度估计矢量和导航定位参数估计矢量的表达式，以及相应的协方差矩阵；构造了gps测码伪距和测相伪距的观测模型，并分别进行了线性化处理；分析比较了多种gps整周模糊度确定算法，认为lambda算法是实现整周模糊度动态确定( ambiguityresolutiononthefly ? arof )较为有效的算法；然后对lambda算法中整数最小二乘估计进行了深入的分析，得出结论：模糊度去相关处理是整数最小二乘估计的关键过程。