查询词典 discontinuity

It is the first important step in video analysis and will directly affects the effectiveness of indexing Shot boundary detection is one of our major research interests and we will tackle the following existing problems the ambiguity between gradual change and camera motion, the discontinuity during gradual change, false detection caused by illumination variation and flashlight, automatic threshold selection Firstly, we discuss shot boundary detection in non-compressed domain In chapter 2, we compare some of the commonly used detection methods which are based on frame difference and point out that single feature will not generate good results As a conclusion, we use fuzzy logic to combine multiple features Presently, most frame difference based shot boundary detection algorithms rely on threshold and hence the selection of such thresholds will greatly affect the performance of boundary detection We propose a membership function to define frame difference and calculate the membership with self adaptation according to the statistic distribution of frame differences to satisfy different type of video clips Experiments show that the proposed fuzzy shot boundary detection algorithm can be used with different video types and has a high detection precision and recall In chapter 3, we discuss model-based shot boundary detection algorithms regarding chromatic and spatial editing effects such as fade-in, fade-out, dissolve and wipe Various parameters are proposed to better describe the characteristics of each editing type.

镜头边界的检测是把视频自动地分割为一个个镜头，作为基本的索引单元，因此它是视频分析重要的第一步，直接影响到视频检索的成败。镜头边界的检测是本文研究的重点之一。目前镜头边界检测算法主要存在以下问题：渐变与镜头运动难以区别；渐变过程中的不连续与停顿、光照条件的变化及闪光灯等特殊情况会引起误检测；自动选择阈值比较困难等。本文首先针对非压缩域视频进行了镜头边界检测的研究。在第二章中我们采用了比较流行的基于帧间差的方法。在比较各种帧间差计算方法的基础上，指出使用单一的特征难以取得很好的检测效果，提出用模糊逻辑综合使用各种特征。目前大多数基于帧间差的镜头边界检测算法都采用阈值法进行镜头转换的判别。阈值选择的误差对检测性能有较大的影响，本文提出用隶属度函数定义帧间差较大、中等较大和较小等概念，并根据帧间差的统计分布自适应地确定隶属度，以适应不同类型的视频片断。实验结果表明这种基于糊逻辑的镜头边界检测算法可以适应不同的视频，并具有较高的检测精度和检出率。在第三章中采用基于模型的方法进行镜头渐变的检测，研究了淡入／淡出、慢转换和扫换的模型。

One mode is slippage along the discontinuity provided by the lubricated fault plane.

其中一种方式是沿着润滑的断层面所形成的间断面而发生滑动。

On a singular surface of order 1 the deformation gradient and the velocity of the medium may suffer finite discontinuity.

在1级的奇面上，媒质的形变梯度和速度可以经受不连续性。

Has no or finite discontinuity points in one period

在一个周期内至多只有有限个极值点

However, values estimated by SMO does have chattering problem because of the discontinuity and finite switching frequency of the real system.

但实际系统的不连续性和有限的滑模开关频率以及滑模开关增益选取不当使得滑模变结构观测器所估计量存在抖振问题。

Things affect our sense of continuity or discontinuity. They play a role in the structure of situations and the foreshortening of our relationships with things accelerates the pace of life.

事物就会影响我们对连贯性和不连贯性感知，它们在情景构造上起到了重要的作用，同事，它们和我们的短暂关系加快了生活的速度。

We develop relationships with things. Things affect our sense of continuity or discontinuity. They play a role in the structure of situations and the foreshortening of our relationships with things accelerates the pace of life.

人类发展与物质的关系，物质影响我们对联续与短续的意识，它们在情景结构中扮演角色，人类与物质关系的透视缩短加快了人类发展的进程。

When the sensor is forward biased at a current of 2 mA, the range of positive temperature coefficient of the sensor resistance is extended up to +300 C as a result of the minority current discontinuity and majority carrier injection.

当传感器在2mA的正向偏置电流下，由于少数载流子的不连续性以及多数载流子的注入，传感器电阻的正温度系数区拓宽到573K（＋300℃）以上。

Discontinuity is an essential feature of the modernity, and primary prerequisite that we launch studying about modernity too; Three motive force mechanisms of modernity—Separation of time and space, disembedding mechanism, reflectivity in knowledge.Modernity has four basic institutional dimensionality :Capitalist, industrialism, military power and surveillance.

现代性的基本特征是断裂，而且也是我们展开对现代性研究的首要前提；现代性有三个动力机制：时空的伸延和分离、脱域机制、对知识的反思性；现代性有四个基本的制度性维度：资本主义、工业主义、军事力量和监督体系，由此所导致的全球化也有四个维度：世界资本主义体系、民族国家体系、国际劳动分工和世界军事秩序。

After studying the characteristics of Particle Swarm Optimization,Particle Swarm Optimization is used in wavelet domain to optimize the thresholds,and garrote shrinkage function is used to process wavelet decomposition coefficients,which overcome the shortcoming of discontinuity of hard-threshold and decreased the fixed bias of soft-threshold.

研究粒子群优化算法的特性，将其应用于小波域，对阈值进行寻优，并使用garrote阈值函数量化小波分解系数，而garrote阈值函数既克服了硬阈值函数的不连续性，也减小了软阈值函数存在的恒定偏差。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。