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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。
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This project studies the scale-dependent deformation behavior of the metal matrix composite, the void nucleation and void growth mechanisms at the micron/submicron scale. The main results are:(1) In prophase, growth and coalescence of the void embedded in the graded matrix are analyzed in detailed;(2) Based on the infinite solid model containing a micro-void, coupling effects of the void shape and the void size on the void growth are studied carefully, the results show that it seems to exist a critical equivalent void radius, which is associated with the material length. When radius of a microvoid is close to or smaller than the critical void radius, the micro-void growth rate is essentially eliminated;(3) The coupling effects of the particle shape and size on the mesoscopic stress fields within the particle and matrix are also investigated by introducing the conception of inclusion/matrix interfacial energy. The results show that the stress concentration factors within the particle and on the matrix/particle interface are also strongly size-dependent,so the void nucleation mechanism is size-dependent.(4) By employing a specific orthogonal curve coordinate frame and a 'kernel function' conception, a 'unified method'solving the spheriodal and spherical void problems is suggested; by this unified method, size-dependent plastic potentials of the porous materials containing the spheriodal or spherical voids are obtained, which extend the traditional Gurson model for the spherical void and GLD model for the spheriodal voids to the micron scale.(5) Based on the RVE model containing the spheriodal or spherical particles, the influences of the particle shape and size on the size-dependent mechanical behavior of metal matrix composite are studied.
中文摘要:本项目对金属基复合材料在微细观尺度下的尺度相关变形行为、孔洞形核及长大的机理和模型进行了研究,取得了如下主要结果:1)在前期研究中,探讨了基体的梯度分布对孔洞长大和聚合的影响;2)基于含孔洞的无限大体模型,探讨了孔洞形状和孔洞尺寸对其长大的耦合作用,结果表明:可能存在一个与材料特征长度相关的临界孔洞尺寸,当椭球孔洞的等效半径小于临界孔洞半径时,孔洞的长大受到明显抑制;3)通过引入基体/夹杂界面能的概念,分析了夹杂尺寸、夹杂形状对材料细观应力场的耦合影响,结果表明:颗粒内部和界面上的应力集中因子强烈地依赖于夹杂的尺寸和形状,因此,孔洞的形核机理是尺寸相关的;4)采用一种特殊的正交曲线坐标系和引入"核函数"的概念,"统一"地得到了含椭球和球形孔洞的材料的尺寸相关塑性势,它将传统的Gurson球形孔洞模型和GLD椭球孔洞模型推广到微尺度范围;5)基于含椭球和球形夹杂的体胞模型,初步研究了夹杂形状、夹杂尺寸对金属基复合材料尺寸相关力学行为的影响。
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GC ECD method was used to analyze the concentration of methyl chloride in atmospheric samples collected from different latitude. The experimental results show that the atmospheric concentrations of methyl chloride show a tendency to decrease towards the poles.
用GC ECD的方法对不同纬度氯甲烷浓度的分析研究表明,大气中氯甲烷的全球浓度表现出从赤道向两级递减的趋势。
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Here illustrate by examples on the method of choosing and determining physical base and space metric tensor in arbitrary curvilinear coordinate system, the results show clearly that this algorithm of matrix is correct, and show that the algorithm of matrix is really ...
并用示例说明在正交或非正交的任意曲线坐标系中选择和确定物理基及空间度量张量的方法,所得结果与文献[1]和[2]完全吻合,表明这一方法是令人满意的。
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But now we can see that even if Jackson and Chalmers' thought experiments show something about what can be extracted a priori from microphysics, they don't show any disanalogy between the concept of consciousness and the concept of water.
但是,现在我们能够明白这,即使Jackson的和Chalmers的思想实验指出某种关于'究竟哪些可以从微观物理学先天得到'的事情,它们也不能指出在'意识概念'和'水概念'之间任何的不类似。
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Put on a variety show .Vaudeville or musical entertainment presented between the acts of a burlesque or minstrel show .
音乐节目,综艺节目,杂耍在滑稽剧或滑稽说唱团演出的幕间表演的杂耍和音乐娱乐节目
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Panel furniture, sofas, furniture, software continued to maintain the previous show strong, gathered in the domestic top export-oriented enterprises and to build a multi-brand system, a well-known large enterprises, their products and unusual taste; and export exhibition consistent positioning of classical furniture scale basis in the last doubled, all-solid wood and solid wood furniture Paper on behalf of the Chinese classical furniture of the highest classical standards; around the metal Furniture Mission to become a strong presence at this show in Shenzhen One highlight of the exhibition, which makes the event in March exports towards the internationalization of the road to a more unique; the size of the first home exhibition饰品overseas buyers has fully met the needs of integrated procurement; indispensable furniture accessories furniture for the whole industry chain and downstream enterprises to build a valuable platform for cooperation.
板式家具,沙发,家具,软件继续保持原来的显示出强劲,在国内主要出口聚集型企业,并建立一个多品牌体系,著名的大型企业,其产品和不寻常的味道;和出口古典家具展览会的规模定位相一致的基础上,在过去翻了一番,全实木,对中国古典的最高标准,代表的古典家具实木家具纸,在金属家具使命,致力成为在这个强大的存在显示深圳的展览之一,这使得在迈向国际化的道路以更独特的3月出口的亮点,第一家饰品展览规模的海外买家,充分满足了综合采购需要;必不可少的家具配件家具整个产业链下游企业建立合作的宝贵机会。
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Type of real estate as a financial professional strong media "Capital Real Estate Securities Journal" joint "Mongo'mongo Bashang villa tidal animal husbandry held a large-scale lottery —" Look,"Journal of capital real estate securities" free smoke free house , to attract in this show all exhibitors, investors and a number of curious people, becoming the most popular show in the landscape.
类型的房地产作为一个金融专业的强大的媒体"资本房地产证券报"联合" Mongo'mongo坝上别墅潮汐畜牧业举行了大规模的彩票—"你看,"资本杂志房地产证券"免费无烟家,以吸引在此查看所有参展商,投资者和一些好奇的人,成为最流行的显示的景观。
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The research results show for low Sn concentrations, for example 1wt%Sn with respect to Ni, the Ni/Sn surface alloy is energetically preferred. We have also used XPS to characterize the catalysts. The quantified Sn and Ni XP spectra for Ni/Sn/SLT catalysts show that Sn preferentially segregates to the surface of the Ni/Sn alloy. We demonstrate that supported Ni/Sn alloy catalyst provides significantly higher reforming reactivity and resistance to deactivation via carbon deposition than supported monometallic Ni catalyst both in steam reforming of CH4 and CO_2 dry reforming.
本文以SLT为支撑体,利用Sn对传统的Ni基催化剂进行表面合金化处理,成功制备了Ni/Sn表面合金重整催化剂,将该催化剂用于甲烷和丙烷的CO_2重整和水蒸汽重整反应,研究结果表明,在Sn浓度很低的情况下,例如1wt%Sn含量,从能量角度看更易于形成表面合金,XPS数据也显示Sn更易于富集在Ni/Sn合金催化剂表面。
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The three-seater citied vehicle, Pivo, was firstly unveiled by NISSAN at 2005's Tokyo Motor Show. Subsequently, it was displayed frequently at the international main motor-show, such as in Beijing and Geneva, and gained wide welcome.
日产发表三座都市车Pivo最早还是在2005年的东京车展上,随后该车也在北京及日内瓦等国际重要车展中频繁亮相并受到了广泛的欢迎。
- 相关中文对照歌词
- Show Me Sumthin'
- Show Me
- Activate My Heart
- Show Me
- My Trunk
- Ya Tvoya Ne Pervaja (I Am Not Your First)
- Show Out
- Show Out
- Show Business
- The Extra
- 推荐网络例句
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As of Tuesday, Google's results were still censored in China.
截至周二,谷歌的搜索结果仍受中国审查。
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In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.
在这一过程中,人的主体性发挥是社会有机体健康发展的灵魂。
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Objective To investigate the relationship between the telomer ase activity and apoptosis in gastric cancer.
目的为了探讨胃癌组织中端粒酶与细胞凋亡的关系。