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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。

To meet the common demands of the heterodyne signal process system, a phase measurement system based on dual-differential phase discrimination is studied and applied. With the frequency range of 5kHz-50kHz, this system has sampling rate of 10/sec, stability of ±0.0036°, maximum error of ±0.06°, and it can measure the zero point of phase angle.

围绕高精度外差信号处理系统的一般要求,研究和实现了基于双向差动鉴相的相位测量系统,在5kHz-50kHz的范围内、采样速率10次/秒时,示值稳定性优于±0.0036°,最大误差小于±0.06°,可以测量零相位。

The company researches and develops dimer acid synthesis technology by the Sichuan bentonite primarily catalyst, receives in the product quality and the product rate on greatly surpasses the domestic same profession (dimmer acid color ≤7#, viscosity between 5000~10000cp/250C adjustable, receives rate is higher than same profession 10%); serialized product plan: dimer acid, the monomer acid, the benzene dissolves the polyamide resins, alcohol dissolves the polyamide resins, the liquid polyamide resins mellowly and polyamine hotmelt adhesive, lets the enterprise in the intense market competition, adjusts the product mix nimbly, achieves should accomplish a task with ease to the market.

公司研发的以四川膨润土为主催化剂的二聚酸合成技术,在产品质量和产品收率上均大大优于国内同行业(二聚酸色泽≤7#,粘度在5000~10000cp/250C 之间可调,收率高于同行业10%);系列化的产品方案:二聚酸、单体酸、苯溶聚酰胺树脂、醇溶聚酰胺树脂、液体聚酰胺树脂及聚酰胺热熔胶,让企业在激烈的市场竞争中,灵活调整产品结构,做到应对市场游刃有余。

In heparin-free hemodialysis using hemophone, 5% GS as menstruum is better than NS.

在血仿膜吸附法无肝素透析中5% GS作为肝素溶媒的吸附效果优于NS。

Potassium mercuric tetrachloride absorption accuracy and precision is better than formaldehyde absorption.

四氯汞钾吸收法的准确度以及精密度优于甲醛吸收法。

PZT (50/50) thin films were prepared by metallo-organic compound decomposition method using lead acetate, titaniu m-n-butoxide and zirconium oxychloride on Pt/SiO〓/Si substrates.

其基本淀积条件为:微波功率500W,反应压力0.4Pa,衬底温度100℃,气体流量30~50 SCCM,此条件下薄膜的淀积速率大于15nm/min,8英寸直径内均匀性优于97%,折射率分别在1.93、1.47和1.47~1.92。

On the basis of the Young-Helmholtz theory, a method for assessing degree of metamerism of colored objects is developed by using the concept of average Hamming distance in terms of the differences of spectral visual response.

根据杨赫姆霍尔兹对立学说,运用模糊性度量中平均Hamming距离的概念,提出了以光谱视觉响应差异为基础的同色异谱程度评价方法,分析结果表明该评价方法优于CIE的评价方法。

The results showed that middle aged women used greater force on contact and leaving phase;the muscle activity and balance control capability of middle aged women on the first metatarsus and heel area were better than those of elder women's.Middle aged women can generate more ankle movement while the other parts of the b...

结果显示:中年女性在行走时无论是在脚刚接触地面还是在离地时所用的力均大于老年女性;中年女性第一跖骨和足跟部位的肌肉活动和平衡能力控制优于老年女性;中年女性可以在身体其他部位运动的同时使踝关节产生更多的运动,并产生更大的水平力来确保压力中心处于支撑面范围内。

The theoretical analysis and simulation results show that, based on the differential geometry of the chaotic controller not only can eliminate the chaotic oscillation, but also be able to control the system to any given orbit, the effect was better than the traditional method of linear approximation.

分析和仿真结果显示,基于微分几何方法设计的控制器,不仅能够消除混沌振荡,而且能够把系统控制到任意给定轨道上,控制效果明显优于传统近似线性化方法。

A topdown design of an 8bit RISC MCU is presented, in order to overcome the limitation of MCS51 microcontroller The core is based on Harvard architecture with 16bit instruction length and 8bit data length The performance of the MCU has been greatly improved by introducing singleclockcycle instructions, setting multiple highspeed working registers, replacing microprogram with direct logic block, etc FPGA verification and computer simulation show that its maximum clock frequency and instruction e...

在对传统的MCS51系列单片微控制器的局限性进行分析的基础上,设计了一种基于增强8位RISC构架的微控制器内核。该MCU核采用哈佛结构、16位指令字长和8位数据字长,通过设计单周期指令、在内部设置多个快速寄存器及采用硬布线逻辑代替微程序控制的方法,加快了微处理器的速度,提高了指令的执行效率。计算机仿真验证和FPGA仿真验证的结果表明,该MCU的最高时钟频率和指令执行效率等指标均优于MCS51的5倍以上。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力