本文由连续介质中的可变场的矢量线的保持性条件，主要讨论了运动系统中电磁场的保持性问题。
Based on the conservative condition of vector lines of variable field in the continuous medium, the problems of electromagnetic field in the moving system are discussed in this paper.
简言之，矢量数据利用最简单的拓扑实体—点、线和多边形，并在二维笛卡尔坐标系统中固定它们来描述地理特征。
In short, vector data take the simplest topological entities — points, lines, and polygons — and anchor them within a 2-d Cartesian coordinate system to describe geographical features.
在等高线的矢量化过程中，可根据实际需要对采样密度进行控制。
The sampling density can be controlled according to the practical requirement during the course of contour line vector.
论述了从地形图中提取等高线、对等高线矢量化以及通过矢量数据生成高程数据的实现方法。
In this paper, the methods of drawing contour line from terrain map, the vector of contour line and generating elevation data from vector data are discussed.
本文针对图纸矢量化中的图元识别技术，提出了系统的基于线弧分离和拟合识别方法。
In this paper, a general method for meta-graph recognition is proposed based on curve fitting and separation of line and smooth curve.
当诱导域与试验域之间的色调差增大时，试验目标色觉位移的幅值减小，而色觉位移矢量偏离恒定色调线的偏向角却增大。
When the hue difference increased, the magnitude of color shift in test target decreased, but the deflection Angle of color shift vector from constant hue line increased.
研究了截面轮廓线的矢量化技术。
用矢量点积求立方体的两条对角线所夹的钝角。
Use the vector dot product to find the obtuse Angle between two diagonals of a cube.
基于变频调速技术和矢量控制原理，设计钢铁行业处理线的交流异步马达的传动方案。
Frequency conversion technology based on vector control theory, design of steel industry processing lines of induction motor driving program.
文中介绍了有关泡面法向矢量、切向速度、曲率和接触线等的计算技术。
Numerical techniques related to the calculation of normal vector, tangential velocity, curvature and contact line are explained in detail.
由能量方程出发，引入新变量，用旋转矢量法讨论了三线摆大角度摆动时的周期。
New variable is introduced based on energetic equation, the period of vibration of three wire pendulum is studied using the method of rotating vector.
并基于等高线矢量数据建立不规则三角网，再内插格网生成DEM点阵数据。
A triangulated irregular network(TIN) is constructed based on vector data, and DEM point-array data is computed by interpolating grid on TIN.
针对海量空间线矢量的图幅间自动拼接，提出了“虚拼接”方法。
A virtual jointing method was also proposed for massive spatial line vectors between sheets.
以圆矢量函数为工具，推出了误差条件下的渐开螺旋面方程，并以啮合线为媒介，建立了测量蜗杆误差补偿的数学模型。
With the tool of circle vector function, the involute helix profile with error is given, and with the media of engagement line, the error compensation mathematical model is established.
为了分析线接触回转铣削外圆柱工件表面加工质量，运用矢量运算方法建立了线接触回转铣削外圆柱工件运动学模型。
To analyze the machined quality of cylindrical surface with line-contact rotating-milling, the kinematic model of tool-teeth is built based on vector theory.
论文主要讨论了基于细化的线划图的矢量化方法。
The paper mainly discusses vectorization based on thinning of line drawing.
介绍对二值地图图像矢量化过程中的线跟踪操作之前的去毛刺算法，应用此算法可以得到更好的线跟踪效果。
The paper introduces deburr algorithm before line trace in the course of vector quantization of binary map image, and it can receive better effect through applying for the algorithm.
本文研究了矢量水听器均匀线阵的采用不同方式进行波束形成的波束图，并和声压阵相应的量进行了比较。
In this paper, beam patterns of vector-hydrophone linear array using different components of vector hydrophone were presented and compared with pressure hydrophone array.
较详细地论证了空间等值线和矢量轨迹线在定量解释中应用的基本方法——量扳法。
Then the application of the spatial contour and the vector track in quantitative interpretation was discussed in detail.
然后是三相四线制无功补偿发生器的理论基础（主要是瞬时无功功率理论和IGBT脉冲产生的空间矢量法）；
Thirdly, this paper introduces academic base used in this equipment , mainly are instantaneous Var power theory and Special Vector Method for generating pulse used springing IGBT;
系统采用基于矢量运算的恒频积分算法，设计三相三线并联型有源电力滤波器PAPF。
The system adopts Unified Constant-Frequency with Vector Operation, to design 3-phase 3-wire parallel active power filter(PAPF).
本文提出了改进的基于对角线相关矢量量化编码算法。
This paper presents a modified diagonal based fast correlation vector quantization algorithm (MDFCVQ).
介绍了基于光实时延迟线、基于外差混频技术和基于矢量和技术的光子射频移相器，对其工作原理和技术特点作了分析。
Photonic RF phase shifters based on OTTD (optical true time delay), heterodyne mixing technique and vector sum technique were introduced. The principles and features were proposed and analyzed.
研究了一种在细化线的基础上的工程图纸并行矢量化方法。
Based on thinning lines, a parallel vectorization method of engineering drawings is proposed.
在基于定子磁场定向的矢量控制恒线速运行控制方案的基础上，提出了一个速度闭环、磁链闭环的矢量控制方案。
Then a vector control method with speed closed-loop and magnetic linkage closed loops put forward, which is based on the constant velocity by means of stator flux-oriented vector control.
在矢量GIS空间数据中，点、线和面目标是它的基本要素。
Point, line and area are basic elements in GIS vector spatial data.
本文采用矢量水听器均匀线阵研究了利用MUSIC算法对声源进行方位估计，以提高对源方位的估计精度。
In this paper, the DOA of sources are estimated using MUSIC algorithm by a vector-hydrophone ULA (Uniform Linear Array) to improve the DOA estimation resolution.
用矢量点积求立方体的两条对角线所夹的钝角。
Use the vector dot product to find the obtuse angle between two diagonals of a cube .
用矢量点积求立方体的两条对角线所夹的钝角。
Use the vector dot product to find the obtuse angle between two diagonals of a cube .
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