查询词典 area vector

In this paper, the theory, algorithm, and experiment of automatic object detection and tracking are studied in depth. It is firstly pointed out that the essential of Mean Shift method is a special Newton-Gaussian method. A new method named Fast Mean Shift is established to stretch the conservative step of Mean Shift method. The convergence and validity of this new method are proved in theory. And it is also proved that the convergence speed of Fast Mean Shift is faster than that of Mean Shift. The contrast experiments of searching the maximum possibility density of random of data sets in plane and 3D space are done. The results show that this new method can reduce the iterations greatly. A new object tracking method based on Fast Mean Shift is built to improve the object tracking performance, which is shown in the face tracking experiment with the tennis sequence provided by the Ohio State University, and the car tracking experiment with the car sequence provided by Kalsruhe University. The face trcking experiment with highly noised images show that the object tracking method based on Fast Mean Shift has strong anti-jamming ability. A new fast color object detection technology based on characteristic color is established, which use characteristic color distribution to compute the characteristic color vector of any area in an image quickly. With the high performance search method, the fast object detection is achieved. At last, using object tracker based on Fast Mean Shift and color object detector based on characteristic color with the Kalman filter, PID controller, searial communication and other technologies, automatic object detection and tracking system with control system is built. The availability and anti-jamming ability of this system are verified by some object detection and tracking tests in different scenes.

本文对目标自动识别与跟踪进行了理论、计算、试验三方面的深入研究，主要包括：首次指出了目标跟踪技术中常用的均值迁移方法的本质为一种特殊的高斯-牛顿方法，改进了均值迁移方法步长取值保守的弱点，建立了快速均值迁移方法，证明了该方法的收敛性、有效性以及收敛速度优于均值迁移方法；进行了平面和3维随机分布数据集的最大概率密度搜索对比试验，试验结果表明，快速均值迁移方法大大减少了迭代次数；建立了基于快速均值迁移的目标跟踪方法，利用俄亥俄州立大学提供的乒乓球序列图像和卡斯鲁厄大学的汽车序列图像，对人脸和汽车目标跟踪性能分别进行了对比试验，并进行了高噪声人脸图像目标跟踪试验，结果表明，基于快速均值迁移的目标跟踪方法有效提高了目标跟踪性能，具有很强的抗干扰能力；建立了一种新型彩色目标自动识别方法，采用特征色彩分布函数实现了对任意图像区域特征色彩矢量的快速计算，建立了高效的搜索方法，实现了彩色目标的快速识别；将基于快速均值迁移方法的目标跟踪方法、基于特征色彩的目标识别方法与卡尔曼滤波、PID控制、串行通讯等技术结合，建立了带有控制系统的快速目标自动识别与跟踪系统，并在不同场景下进行了目标自动识别与跟踪试验，验证了快速目标自动识别与跟踪系统的有效性和抗干扰能力。

And in the mixed area, motion vector based weighted average is used. To speed up the algorithm, NVIDIA CUDA technology is utilized.

为提高算法的实时性，基于Nvidia 的CUDA技术对算法进行了GPU加速。

These results supply the important theory and practice base to develop safer and more effective multivalent vaccine and anti-tumor immunotherapeutic area using vaccinia virus vector.

这些结果为进一步研究与开发更安全有效的以痘苗病毒为载体的多价疫苗以及痘苗病毒在肿瘤免疫治疗中的应用提供了重要的理论和实验基础。

The images of ranbutan were obtained by CCD camera. Image processing algorithm of OSTU and area labeling were applied to 48 rambutan images in order to remove the images of background and stem, and the texture features of color and lustre were extracted. A multi-grade support vector machine was set up, and color and lustre features were the inputs of DAGSVM.

通过CCD采集红毛丹可见光图像，经OSTU分割算法来分割图像背景后，采用面积标记算法得到去除长穗梗区域的红毛丹图像；然后提取基于色度的红毛丹图像的彩色纹理特征，并用多分类支持向量机的模式识别方法来识别红毛丹色泽等级。

In contrast, injecting a lentiviral vector expressing BDNF rostral into the injured area generated a neurotrophin gradient and promoted directional growth of axons for up to 9 mm.

相反，在注射区吻侧注射表达BDNF的慢病毒产生了神经营养因子梯度，并且促进了方向性轴突生长达9 mm 。

The non-uniform algebraic codebook is determined by the non-uniform statistical properties of the algebraic codebook, and the part-searching-area is determined by the periodicity of the algebraic codebook excitation vector, which makes up the insufficient numbers of signed pulses in algebraic codebook at low bit rate.

非均匀代数码书由代数码书的脉冲非均匀统计特性确定，部分搜索域代数码书则由代数码书矢量的周期性确定，该方法有效地弥补了低比特率情况下代数码书中脉冲数不足的缺点。

The key of the algorithm is how to estimate the derived vector of the surface curve or the first derivative of the surface of revolution according to the given length or area constraint.

算法的关键在于如何利用已知的弧长或面积约束来估计空间曲线或旋转面的旋转曲线在节点处的导向量或一阶导数值。

First through comparison of voltage stability tangent vector index, the power loss sensitivity index as well as the singular value index, then makes the system operators fixes their voltage stability monitoring and prevention stress on the weak nodes and weak area.

首先通过对电压稳定的切向量指标、网损灵敏度指标以及奇异值指标的分析比较，确定系统的弱节点、弱区域，使得系统运行人员对系统的电压稳定的监控和预防侧重在系统电压稳定的弱区域。

The reduction polynomial of a trinomial is represented by the binary vector. On this base, we optimize the algorithm to improve the performance of critical module both on area and on operation time.

在此基础上，我们对关键运算模块的实现进行了算法级的优化，采用了—些有效的方法，使得在较小面积上得到了较快速度，提高了芯片的整体性能。

Vector can represent point,line and area features very accurately..

矢量能非常正确地表现点，线和区域特征。。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。