查询词典 zero position

The key points of sensorless technology in PMBLDCM are to study a method which can detect rotor position accurately by simply method in whole speed range. After analyzing current sensorless methods of the PMBLDCM, it is found that those methods are successful at middle and high speed, but they often fail to detect rotor position at low speed when the back electromotive force is small or zero.

纵观目前的永磁无刷直流电机的无位置传感器控制方法，比较成熟而可行的方法多集中于电机在中高速区域运行时，能够较准确估计转子位置；电机处于低速、极低速、静止状态时电加热管，因为反电动势幅值较小或者为零，而无法正常工作。

Based on the traits of dyadic wavelet decomposition of signal and that of the distribution of wavelet image coefficients, PLVQ and ZR are conjoined by making use of D\-4 lattice. Firstly, Pyramidal lattice vector quantization is adopted to quantize wavelet image coefficients. Nonzero lattice vectors and zero lattice vectors are formed. Secondly, nonzero lattice vectors are dealt with by adopting complex entropy coding. Finally, in order to fix on the position of nonzero lattice vector effectively, that is, to deal with zero lattice vectors effectively, the concept of significant map is introduced into. The significant map is scanned two times from down to up and from up to down.

根据信号的二进小波分解特点和小波图象系数的分布特点，利用D\-4格将PLVQ和零树结合起来，提出了一种基于零树和金字塔格型矢量量化的小波图象编码方法，该方法首先采用金字塔格型矢量方法来量化小波图象系数，以得到非零格点和零格点；然后采用复合熵编码来处理非零格点；最后为了有效确定非零格点的位置，也就是为了有效地处理零格点，又引进了重要图的概念。

The results of the research show that self synchronization closed loop control system through detecting the position of zero value of rotating EMF is new and feasible. In principle it solves the problem how to obtain the accurate rotor position of a step, motor from motor parameters. In design it makes the system simple and practical.

研究结果表明，本文研究的永磁感应子式步进电动机自同步闭环系统在原理上，通过旋转电势过零检测解决了能否利用电机参数获得准确的位置控制与自同步运行问题；在方法上采用数字信号逻辑辩识增强了系统的稳定性，解决了系统实现能否简单实用的问题。

Based on accurate step motor system parameters, the state equations describing step motor dynamic characteristics are set up. The operation of the self synchronization closed loop control system is simulated on computer. In the research the principle analysis and system design have been done about self synchronization closed loop operation. The relation between rotating EMF and the rotor position of the step motor is discussed. Through detecting the zero value of rotating EMF the rotor position of the step motor is indirectly obtained.

在得到准确的步进电动机系统参数的基础上，建立了描述步进电动机动态特性的状态方程，并对自同步闭环系统的动态特性进行了计算机仿真在论文的研究中，分析了旋转电势与电机位置的对应关系，通过旋转电势的过零检测间接得到转子位置信号，利用这种"间接传感器"方法实现了步进电动机的自同步闭环控制，论文从原理分析和系统设计两方面进行了研究。

the fast transposition algorithm to sparse matrix expressed by triple list is introduced.this algorithm needs to determine the position in the transposed matrix position of the first element which is not equal to zero in the original matrix each row,it uses two arrays as auxiliary space.in order to reduce the auxiliary space which the algorithm needed,an improvement is made through introducing two simple variables.the improved algorithm saves a half auxiliary space compared to the original algorithm at the same time complexity.

摘 要：介绍基于三元组表表示的稀疏矩阵的快速转置算法，此算法在转置前需要先确定原矩阵中各列第一个非零元在转置矩阵中的位置，在此使用2个数组作为辅助空间，为了减少算法所需的辅助空间，通过引入2个简单变量提出一种改进算法。该改进算法在时间复杂度保持不变的情况下，空间复杂度比原算法节省一半。

The circular sets out the definition of "false reporting of losses" and provides that intentional false reporting that results in paying zero tax or an underpayment of tax will be subject to Article 63-1 of the Tax Administration and Collection Law. False reporting of losses that results in paying zero tax or an underpayment of tax in a year in which an enterprise benefits from a tax exemption or is in a loss position will be subject to Article 64-1 of the Law. The two previous circulars issued by SAT Guoshuifa [1996] No.

该通知规定了虚报亏损的界定，并规定企业故意虚报亏损，在行为当年或相关年度造成不缴或少缴应纳税款的，适用《中华人民共和国税收征收管理法》六十三条第一款规定；企业依法享受免征企业所得税优惠年度或处于亏损年度发生虚报亏损行为，在行为当年或相关年度未造成不缴或少缴应纳税款的，适用《征管法》第六十四条第一款规定。

Firstly, the object's position and orientation are determined by a vision system, the orientation of an object is the angle between the X-axis of the coordinate system and the axis of the least moment of inertia of the object in this system, and the position value is the vector between the coordinate zero point and the object's centre of gravity.

第一步利用视觉转动惯量法对任意放置在CMM工作台上的工件状态进行定位和定向；第二步利用测量离散点和模型投影点之间的关系，求取工件坐标系和设计坐标系之间准确的转换关系。

The first direct measurement with micrometer piston skirt and the outside diameter Do micrometer stop screw to the locking plate position, and then dial indicator card installed and well well inserted under the initial installation of the amount of cards, directly into the cylinder corresponding cylinder kit, adjust the volume of the cylinder rod out in table inserted length, so that small hands dial indicator cell has about 1 volume of pre-press and lock locking rod inserted mother, at the same time, large dial indicator dial to adjust zero, the last cylinder to adjust the volume of good form under test card inserted rods and do at Anvil micrometer and measured the rod between the big hands dial indicator at this time than the "zero" high value is the piston and cylinder liner with the space.

3先直接用千分尺测量活塞裙部的外径并将干分尺止动螺钉扳转到锁紧位置，再将卡装好百分表和初步安装好插杆的量缸表直接卡入对应气缸套内，调整量缸表插杆的伸出长度，使百分表的小表针有1格左右的预压量并锁紧插杆锁母，同时将百分表的大表盘调整到零，最后将调整好的量缸表的测杆和插杆卡在干分尺的砧座和测杆之间，此时百分表大表针比&零&高的数值即为活塞和气缸套的配合间隙。

Hence, the kinetic energy of the system is zero when its potential energy has its maximum value (choose the static equilibrium position of the system as the zero point of potential energy).

当振体运动到距静平衡位置最远时，速度为零，即系统动能等于零，势能达到最大值（取系统的静平衡位置为零势能点）。

Proper setting of the zero and pole points improves the position control provided by the state space position controller.

基于状态空间算法的位置控制器通过合适的零极点配置，可以提高位置控制性能。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。