1.This paper introduces a method of realization of the numeric controlled oscillator(NCO) used in quadrature digital mixer with the CORDIC(COordination Rotation DIgital Computer) algorithm based on vector rotation.
介绍一种利用矢量旋转的CORDIC(COordination Rotation DIgital Computer)算法实现正交数字混频器中的数控振荡器(NCO)的方法.
2.3. After analyses the distortion of pixel values and geometry during the PS process, we achieve the RST (Rotation, Scale, Translation) invariants using characteristics of Fourier transformation, and extract secret information successfully.
3．针对PS(Print-Scan)过程引起的图像像素失真及几何失真，我们利用傅立叶变换的特性，得到RST(Rotation，Scale,Translation)不变量，解决了纸质二值图像中的信息隐藏问题。
3.Based on look-up table and CORDIC (Coordinate Rotation Digital Computer) algorithm, a method for implementing a numerically controlled oscillator (NCO) is described in the paper. In contrast with the NCO based only on look-up table, its advantages are high precision, simple structure and much less resource consumption.
研究了一种基于查找表和CORDIC(Coordinate Rotation Digital Computer)算法相结合的数控振荡器(NCO)的实现方法,与仅基于查找表的方法相比,该方法结构简单、精度高、耗费资源少。
4.Constructing rational offset and rational Rotation-Minimizing Frame of Bezier curve or B-spline curve during rendering sweep surface which are compatible with CAD system are two important problems in CAGD.
等距(Offset)有理构造与扫掠曲面生成中的最小旋转标架(Rotation-Minimizing Frame简称RMF)的有理构造是CAGD研究领域中的两重要内容。
5.Coordinate Rotation Digital Computer(CORDIC) algorithm is suitable for realization of DDS. The normal algorithm of CORDIC and the basic construction of DDS are introduced. We put forward a pipelining style CORDIC approach,which is used in the design of Field Programmable Gate Array(FPGA).
为了实现CORDIC(Coordinate Rotation Digital Computer)算法在DDS(Direct Digital Fre-quency Synthesis)中的应用,文章介绍了CORDIC算法的一般法则和DDS的基本结构,提出了一种流水线型的CORDIC算法,并应用于FPGA(Field Programmable Gate Array)设计中,最后给出了基于ModelSim的仿真结果。
6.By using the lattice-rotation model,the screw and edge dislocation densities of the samples were calculated.
通过使用晶格旋转(Lattice-rotation)模型拟合,计算出样品的螺位错密度和刃位错密度。
7.The rotation control technology in the laser gyro strapdown inertial navigation system was studied.The method of realizing closed-loop digital control with RLG located in the strapdown inertial navigation system was discussed.The structure of rotation servo system was introduced.The designing method and process of the digital controller were given.The method of implementing digital controllers by means of computer and software flow were demonstrated.The result of simulation and debugging of this system showed that it fullfills the requirment of the strapdown inertial navigation system.It assures the stability of rotation and solves the problem of striking without increasing the volume and cost of the system.
研究激光捷联惯导系统中的转位控制技术.采用捷联惯导系统本身的RLG实现转位系统的闭环数字控制，给出了转位伺服系统的结构组成以及数字控制器的设计方法和设计过程，给出了数字控制器的计算机实现方法和软件流程.仿真及调试结果表明，所设计的转位伺服系统满足捷联惯导系统的要求，既保证了转动的平稳性，克服了到位撞击问题，又不增大体积、增加成本.
8.The motion of large diameter cylinder breakwater under the action of random waves consists of three parts: rotation, rotation-small sliding and rotation-large sliding.
摘要根据大直径薄壁圆筒防波堤的受力特征，提出了防波堤可能出现的3种运动模态：摇摆运动、摇摆－小滑移运动和摇摆－大滑移运动。
9.In addition to forward and backward rotation, center of rotation and rotation angle in certain procedures can be set up.
除向前和向后旋转以外，旋转中心点和旋转角度在某种程序上可设置。
10.Through the study about the length of these dumbbells(ID IID) in different rotation direction change with the bias field, we find that those dumbbells in same length have different static character because of the different rotation direction, it is very different of the collapse field in the clockwise and reverse rotation dumbbell domains.
通过对不同旋转方向的哑铃畴(ID、IID)的畴长随直流偏场的变化关系的研究发现，畴长相同的哑铃畴，因旋转方向不同而表现出不同的静态特性，顺时针转动的哑铃畴和逆时针转动的哑铃畴的缩灭场明显不同。
