It depends what the problem is asking the question is, is it enough to find the components of a vector or do we have to find the equation of a line?
这都是根据题目要求而定的，有一个问题是，找出向量的分量就足够了吗？，还是说我们需要解出一条直线的方程？
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。
So, in both cases, we need the vector field to be defined not only, I mean, the left hand side makes sense if a vector field is just defined on the curve because it's just a line integral on c.
了解这两种表述后，我们不仅需要向量场，就是左边这里，这是曲线c上的线积分，向量场在曲线上有定义。
OK, so, we've seen that if we have a vector field defined in a simply connected region, and its curl is zero, then it's a gradient field, and the line integral is path independent.
一个向量场,如果定义在单连通区域并且旋度为零，那么它就是一个梯度场，并且其上的线积分与路径无关。
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。
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。
After making sure that Vector is properly imported, begin the next line again by typing names.
在确信正确导入Vector之后，再通过键入名称开始下一行。
In this definition, argc is the number of arguments passed in (argument count) and argv is an array of strings representing options passed in from the command line (argument vector).
在这个定义中，argc是传递进来的参数的个数(参数数量)，而argv是一个字符串数组，代表从命令行传递进来的参数(参数向量)。
Add a line to the main method creating a Vector called names.
在main方法中加入一行代码，创建名为names的Vector。
So, to say that a vector field with conservative means 0 that the line integral is zero along any closed curve.
一个保守的向量场就是说,沿任意闭曲线的线积分的结果是。
Well, at point P, the velocity vector QP is perpendicular to the line QP, 1 so the sine of that angle is one.
点P，速度向量,垂直于直线，所以该角的正弦值为。
You create a pure vector-based drawing here and render a line here from source node to destination node.
您创建了一个纯粹基于矢量的绘图，并且显示了一条从源节点到目标节点的连线。
Vector data refers to data defined by geometric constructs, such as line segments representing a street or points representing single locations.
矢量数据指的是通过几何结构定义的数据，如线段表示街道，而点表示位置。
So, see, this coefficient becomes zero exactly when the line is perpendicular to the normal vector.
看到了吧，系数变为0了，当直线垂直于法向量的时候。
So, one of them says the line integral for the work done by a vector field along a closed curve counterclockwise is equal to the double integral of a curl of a field over the enclosed region.
其中一种说明了，在向量场上，沿逆时针方向，向量做的功等于，平面区域上旋度F的二重积分。
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。
For the case of planar interception, the so called relative heading error angle between the relative velocity vector and the LoS (Line of Sight) is chosen as the output to be controlled to zero.
针对平面拦截问题，选择导弹和目标之间的相对速度矢量与导弹-目标视线之间的夹角（称为相对航向误差角）作为将要被控制到零的输出。
The sampling density can be controlled according to the practical requirement during the course of contour line vector.
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。
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。
Only if the component vectors are on a straight line will the length of the vector for the sum be equal to the sum of the lengths of these components or to their difference.
只有当几个分矢量在一直线上，那么表示其和的矢量长度才会等于这些分量的长度和或它们的差。
Numerical techniques related to the calculation of normal vector, tangential velocity, curvature and contact line are explained in detail.
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。
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.
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。
This article analyzes a few profound concepts, such as companion matrix, line vector, column rector, orthogonal matrix, and recommend many qualities, which are difficult to grasp for many students.
本文剖析了线性代数中伴随矩阵、行向量与列向量的乘积、正交矩阵几个较难掌握的概念，由此引出这些概念的一些基本特征和性质。
Select the wire side of the vector can also use the toolbar to draw points, drawing a line screen.
说明：对矢量图的电线面进行选择，还可以用工具条来画点，画线，画面。
A new multi-stage vector quantizer (MSVQ) of line spectral frequency parameters is designed.
设计了一种新的线谱频率参数多级矢量量化编码方案。
The influence of each vector on the cell proliferation, clone-formation and alteration of cell cycle of bladder cancer cell line EJ were observed in vitro.
分别转染膀胱癌细胞株EJ ，观察不同载体对膀胱癌细胞体外增殖、克隆形成和细胞周期时相的影响。
Objective: to construct eukaryotic expression vector of human death receptor (DR5) and transfect NS-1 cells to establish stable NS-1 cell line.
目的：构建人死亡受体5 (DR5)真核表达载体，转染NS - 1细胞，建立稳定转染的NS - 1细胞系。
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。
Key points: application of the direction vector of a line and the normal vector of a plane.
重点：直线的方向向量与平面的法向量的应用。
Key points: application of the direction vector of a line and the normal vector of a plane.
重点：直线的方向向量与平面的法向量的应用。
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