In the PDF form, there could be graphic elements such as a vector image, an oblique line, and a curved line. 在PDF表单中,可以有图形元素,例如矢量图像、斜线和曲线。
It's the dot product between the normal vector of a plane and the vector along the line. 这是平面法向量,和沿直线向量的点积。
A towed ship interference canceling algorithm for vector sensor line array 一种基于矢量拖曳阵的拖船干扰抵消算法
It provides us with a large arsenal of vector graphic types such as Line, Ellipse, Path and oth. 它提供了一个大型军火库的载体,我们如线,椭圆,路径和其他图形类型。
Construction and identification of recombinant retroviral vector and stable cell line expressing latent membrane protein 2A of Epstein-Barr virus EB病毒潜伏膜蛋白2A基因重组逆转录病毒载体和稳定表达细胞株的构建及鉴定
Visualization of vector magnitude based on line integral convolution 基于线积分卷积可视化矢量场大小的研究
In this paper, the transport structures of double diffusive natural convection in a square cavity driven by two discrete heat and mass sources were analyzed by the use of "vector line" method. 本文通过“矢量线”可视化方法,解析了一个方腔内由双离散热源和污染源驱动的双扩散自然对流系统的传输结构。
And, these coefficients here correspond to a vector parallel to the line. 这些系数构成的向量和直线平行。
The validity of the observer has been proved and the good dynamic and static performance of the PWM rectifier under the virtual line flux linkage vector oriented control without line voltage sensors have been showed by both simulation and experiment. 仿真和实验结果验证了所提出观测方法的有效性和无电网电压传感器条件下,三相电压型PWM整流器虚拟电网磁链定向矢量控制运行的良好动、静态特性。
Progressive Transmission of Vector Line Data 矢量曲线的流媒体传输
Split vector quantization of line spectral frequency parameters 线谱频率参数的分裂矢量量化
A special kind of unabridged end conditions like wing is used in the interpolation of curves, it needs both radius of curvature and tangent vector perpendicular to chord line, and has been solved very successful by special processing. 其中一种比较特殊的完备边界条件是翼型条件,它要求在端点处有垂直于弦线的切线,并且具有给定的曲线半径;
The purely kinematical equation for the tangent vector of a line element is derived. 导出了线元切向量的变形方程以及拉伸轴在极射赤面投影图上位置变化计算公式。
The original direction of drilling cores can be determined by vector compounds in line with above principle. 利用这一原理,通过矢量合成可确定钻井岩芯的原始方位。
The Passive Synthetic Aperture Technique of Acoustic Vector Sensor Line Array 矢量水听器线列阵的被动合成孔径技术
Online a preliminary study of aftershock vector the finish line 地震余震向量线初探
A Fast Object Locating Algorithm by the 2-D Gray Scale Vector based on Off Line Training 基于离线训练的二维灰度特征向量快速目标搜索算法
An approach based on multiple vector quantization for on line text independent speaker identification 基于多码本矢量量化的非限定文本的联机话者辨认方法
This paper firstly compares text file format with binary file format, then presents a new binary file format of vector map in a line data sample which is easy to be serialized and is convenient for developing Object-Oriented GIS. 比较了二进制文件与文本文件的优缺点,以线状数据为例设计了便于文档序列化、易于面向对象GIS开发的二进制矢量地图文件格式。
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. 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。
This algorithm includes the following steps: Firstly, mapping both the pixels gray standard deviation and the grade vector mean of the line objects separately into the dual space by project transform. 该算法包含以下步骤:通过投影变换,分别将直线的灰度级标准差及其边缘梯度矢量均值映射到直线方程的对偶空间;
Method for building vector database from digital line graph in AutoCAD AutoCAD平台上数字线划图的建库方法研究
ARPA radar vector line navigation ARPA雷达矢量线航法
So a virtual line flux has been constructed to serve as the oriented vector instead of the line voltage vector to remove the AC voltage sensors and reduce the cost of PWM rectifiers. 采用类似于交流电机磁链观测的方法来构造一个虚拟电网磁链,可以代替电网电压作为PWM整流器矢量控制中的定向矢量,达到省去交流侧电网电压传感器,降低PWM整流器成本的目的。
Firstly, in the image coordinate, the undistorted coordinates of the desired point on objects was obtained from one image captured by the CCD camera, from which the orientation of the projection vector ( the line connecting the object point and its image) was obtained. 首先由CCD摄像机采集一幅图像,获取物体上目标点在图像坐标系中的理想坐标,并由此确定该点投影矢量(连接物体点和对应图像点的直线)的方向;
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. 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。
We study visualization of time-dependent 2D vector fields based on topological method. Firstly, we research on vector line visualization. Traditional closed streamlines detection was dependent on grid. 本文对基于拓扑法的与时间相关二维矢量场可视化方法进行研究。首先对矢量线可视化进行研究,针对传统方法检测封闭流线时完全依赖网格的问题。
Through the error analysis to predict the results, and with BP and RBF neural network prediction results were compared, based on support vector machine Xinzhou transmission line models to predict follow-up ice thickness accuracy and speed is superior to neural network method. 通过对预测结果进行误差分析,并与BP和RBF神经网络的预测结果进行比较,基于支持向量机的忻州输电线路覆冰厚度模型预测精度和速度要优于神经网络方法。