查询词典 at a stretch

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。

Moving at will from one theatre to another, the two spectators, so far from Home themselves, had something of wistfulness in their eyes as they watched a cat being stroked, a sleepy child picked up and huddled off to bed, or a tired man stretch and knock out his pipe on the end of a smouldering log.

这两位远离自己家园的观众，随意从一家剧院看到另一家剧院。当他们看到一只猫被人抚摸，一个瞌睡的小孩被抱到床上，或者一个倦乏的男人伸懒腰，并在一段冒烟的木柴尾端磕打烟斗时，他们的眼睛里不由得露出某种渴望的神情。

The city will not develop at the cost of ecological view components , such as nature , history , and at the basis of expurgating, properly, the distillate of design in the history of the city humanity which would be a design language to stretch the nature, history and humanity view environments.

通过对一个城市历史的系统解读使得城市化的发展过程不再是以自然、历史、人文等生态景观组成部分的破坏为代价，而是合理地提炼城市人文历史中积淀下来的部分，设计成为这个城市未来生态景观规划中的一个设计语汇，从更宽泛的角度延展这个城市的自然、历史和人文的景观环境。

Take Fuzhou , this historical cultural city , as an example: According to the space heterogeneity of different dividing areas in the city and the green corridor structure of city (among them the green corridor passes through the other ring to take green, the Tenneco green land and garden green land of center district), the problems of how to draw the cleanness, wet and cold air around the surround into the center of city through the high green forest community which alleviate the tropical island effect and improve air quality and how to build the ecological view system of the city are discussed to make the city ecological view environment play its social role, the city will not develop at the cost of ecological view components , such as nature , history , and at the basis of expurgating, properly, the distillate of design in the history of the city humanity which would be a design language to stretch the nature, history and humanity view environments.

以福州这座历史文化名城为例：根据城市不同分区的空间异质性，贯通城市内的绿廊结构(其中绿廊穿越外环绿带、楔形绿地和中心区园林绿地)等探讨在城市化不断发展的过程中如何将城市周边清洁冷湿的空气经过高绿量的森林群落引入城市内部，缓解热岛效应，改善空气质量；以及如何通过城市的生态景观系统的营造使得城市的生态景观环境能够作为一个系统而充分发挥它的社会职能。通过对一个城市历史的系统解读使得城市化的发展过程不再是以自然、历史、人文等生态景观组成部分的破坏为代价，而是合理地提炼城市人文历史中积淀下来的部分，设计成为这个城市未来生态景观规划中的一个设计语汇，从更宽泛的角度延展这个城市的自然、历史和人文的景观环境。

Methane adsorbed on the Mn〓O〓-Na〓WO〓/SiO〓 catalyst can not be found, but it can be adsorbed on outgassed silica at 173K. Such adsorption is formed by interaction of the adsorbed methane with O〓〓 sites and hydroxyls on the surface. The appearance of the band at 2904cm〓 of the V〓 mode (sym. stretch.), which is an infrared forbidden vibration, implies that the Td symmetry of the methane molecule may be distorted somewhat on the surface of silica. The small frequency shift (30cm〓) of OH stretching indicates that only a weak hydrogen-bonding interaction between adsorbed methane and hydroxyls exists in the methane adsorption.

甲烷不能在Mn2O3-Na2WO4/SiO2催化剂上吸附但在l73K的温度条件下可吸附于SiO〓表面上，这种吸附是通过吸附甲烷与表面配位不饱和氧和表面羟基作用而形成的，红外禁阻的V〓振动模式显示出红外活性说明甲烷分子的Td对称性发生畸变，甲烷吸附后羟基位移只有30cm〓，吸附甲烷同表面羟基间的氢键作用很弱。

Inexplicable always feel like the time within the next few precious memories will be stripped from me, more than once dreamed that his standing in a dark empty space, only one track at the foot stretch into the distance, such as the long past your time and ultimately disappear In my field of vision at the end.

莫名其妙总是觉得像在未来数珍贵的记忆时间被剥夺了我不止一次梦见自己站在一个黑暗的空白区域，只有一个脚延伸到轨道的距离，如长期以往你的时间和最终消失在我的视野在最后。

Inexplicable always feel like the time within the next few precious memories will be stripped from me, more than once dreamed that his standing in a dark empty space, only one track at the foot stretch into the distance, such as the long past your time and ultimately disappear In my field of vision at the end.

总是会莫名地感到时间在抽丝剥茧般的将宝贵的回忆从我身上剥离，不止一次梦见自己站在一片空旷黑暗的空间里，脚下只有一条铁轨伸向远方，冗长如过往的光阴，最终消失在我的视野尽头。

My idea is to get Yao out for a four-minute stretch in the first quarter and bring him in at the end of the quarter, because he's good at the end of the quarter.

我的想法是在第一节中间让Yao下来连续休息个4分钟，然后在第一节快结束时把他重新换上场，因为他在每节结束之前通常表现都非常好。

I had no choice but to stare breath, and after a while, it fears Disturbed by the small head out the reconnaissance to see if there are no enemies around us, only carefully stretch out my head, my hand just want to go to its bumper, timidly it reduced head back, I am fed up, It accidentally dropped it,"snapped" out of its shell was Shuaipo, I hand-pick, at best sticky Yi Mo, Ji Li also hinted at the small things.

我没有别的选择，只能盯着呼吸，经过一段时间，它担心不安小头的侦察，看看有没有我们周围的敌人，只有仔细地伸出我的头，手刚要到它的保险杠，怯生生地降低头部回来，我受够了，它不小心把它丢&终结&了它的外壳是Shuaipo ，我亲自挑选，最好的粘性易模，季李鹏还暗示，小的东西。

I had no choice but to stare breath, and after a while, it fears Disturbed by the small head out the reconnaissance to see if there are no enemies around us, only carefully stretch out my head, my hand just want to go to its bumper, timidly it reduced head back, I am fed up, It accidentally dropped it,"snapped" out of its shell was Shuaipo, I hand-pick, at best sticky Yi Mo, Ji Li also hinted at the small things.

我没有别的选择，只能盯着呼吸，经过一段时间，它担心不安小头的侦察，瞧瞧有没有我们周围的敌人，只有仔细地伸出我的头，手刚要到它的保险杠，怯生生地降低头部回来，我受够le，它不小心把它丢&终结&了它的外壳是Shuaipo ，我亲自选购，最好的粘性易模，季李鹏还暗示，小的东西。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。