查询词典 at a stretch

A stretch of smooth turf extended down the middle, and at the corners were clumps of trees with thick and massy foliage, that made a background for the shrubs and flowers.

花园是个长方形的，中间有一片光滑的草坪，四角有枝叶茂密的树丛，树丛中夹杂着矮树和花草。

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。

But Meleager son of Oeneus got huntsmen and hounds from many cities and killed it- for it was so monstrous that not a few were needed, and many a man did it stretch upon his funeral pyre.

掀翻一棵棵果树，横七竖八地倒躺，根须暴露，花果落地，林国毁于一旦。

Suddenly, one looks very delicate and pretty girls coming to us, told me about her age, Sanzhao hair, a melon seed face, two big red eyes, nose and stretch out with, a sleek mouth, There are stars next to a small mole, are extremely cute.

忽然，一个看上去非常清秀的女孩子向我们走来，她年龄跟我差不多，散着头发，一张瓜子脸，两只红红的大眼，鼻子直挺着，一张圆滑的小嘴，旁边还有颗小痣，可爱极了。

Blink and you might miss this Italian alcove hidden among the industrial storefronts along this coarse stretch of Melrose.

一眨眼的工夫，您可能会错过这个意大利凹隐藏在工业店面沿着这粗长的梅尔罗斯。

This will basically stretch and squeeze the terrain mesh into the size we desire.

这是拉伸和挤压地形网格的基础

To establish the constitutive equation of material, the metric tensor for stress , strain and their transformation equations between different configurations are derived, and basic theory of finite deformation as well as elasto-plastic deformation criterion are studied. By analyzing the applicability of different element models, four-node quadrilateral degenerated Mindlin isoparametric element is adopted because of its good versatility, and the element stiffness matrix is derived. The static implicit elasto-plastic finite element equation for complex skin stretch-forming is put forward based on Updated Langrange formulation.

本文首先系统地阐述了有限变形的相关基本理论，针对板料成形建立了应力应变度量张量及其相应的转换关系；介绍了材料的屈服准则、塑性变形强化规律、塑性流动规律以及加、卸载准则，并在此基础上建立了有限变形各向异性弹塑性本构方程；对板料成形的单元模型进行了分析，针对飞机蒙皮零件特点，采用通用性强的四节点四边形退化Mindlin等参壳单元进行成形模拟，并导出其单元刚度矩阵的具体形式；基于以上研究，以逐级更新Langrange描述的持续虚功率原理为基础，建立了率形式的复杂蒙皮拉形过程静态隐式弹塑性有限元方程。

The back of hand stretchs tight closely the occurrence that stretch tight small microgroove, be about to select the product with gentle nature, contain the product of the moist composition such as glycerine, mineral oil, lanolin for instance.

手背紧绷绷的出现了小细纹，就要选择性质暖和的产品，比如含有甘油。矿物油。羊毛脂等滋润成分的产品。

We're in the home stretch with this project and can't change it now; we can't change horses in midstream.

这个项目我们已经进行到最后阶段，现在不能再变更了，到了河中不换马嘛。

The Three Gorges Dam will be the largest hydropower station and dam in the world, with a1.2 mile stretch of concrete and a370 mile-long reservoir and525 feet deep.

工程完成后，三峡将成为世界上最大的水力发电站，拥有1.2英里长的混凝土纵向围堰、70英里长、25英尺深的水库。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。