1. An unbalanced multiple description video coding scheme is presented based on SP-frame. SP-frame can reconstruct the same image sequences using different reference frames. At this point, SP-frame can recover the lost packet to re-synchronize the bit stream, and the bitrate efficiency of SP-frame is higher than that of I-frame.
提出了一种基于SP帧技术的非平衡多描述视频编码方法,SP帧能够参照不同参考帧重构出相同的图像帧,利用这种特性SP帧可防止错误传播,并且SP帧的编码效率远远高于I帧。
2. The laws of mechanics are the same in all inertial frames of reference. This is called Galilean relativity
在所有的惯性参照系中,力学定律都是一样的,这叫做伽利略相对性。
3. The ultimate aim of the re-study is to provide some new ideas, new frames of reference and new methods for solving the realistic problems.
再研究的最终目的,在于为解决现实问题提供一些新思路、新理论与新方法,以期抛砖引玉,对城市大型广场的设计有所启示。
4. Don`t forget that these effects are absolutely symmetrical as between frames of reference in uniform relative motion.
不要忘记的是,在相对匀速运动系统中,这两种效应是完全对称的。
5. The results provide reference for design and analysis of the marine risers with guide-frames.
该计算结果为带导向架隔水管的设计与分析提供了参考。
6. In addition, after the detailed analysis of those macro-blocks that had no forward motion estimation, the motion information is given approximatively relative to their forward reference frames. And then, a amendatory partial derivative estimation is given for the inconsecutive image blocks when occlusion and cut had happened.
另外对编码过程中未进行前向运动预测的宏块特性进行了详细的分析,给出了这些宏块相对于前向参考帧的运动信息估计方法,并对时域不连续的图像块给出了一种修正的偏导数估计方法,以此解决遮挡、切换等现象。
7. ABSTRACT In the part one of this paper, a novel adaptive image sequence coding scheme is proposed for CD-ROM applications, where the positions of reference frames are determined adaptively based on structure segmentation and compensability analysis.
本文第一部分提出了一类适用于CD-ROM节目制作的自适应运动图象编码系统,根据人的视觉特点自适应调节Q〓有效地分配恒定码流在不同帧和同一帧中不同区域的比例。
8.
8. The principles and methods of choosing the inertial frames of reference in solving the mechanical problems are analyzed.
通过例题,分析了在解决力学问题中惯性参考系的选取原则和方法。
9. From this point of view, some breakthroughs of this dissertation are as below:First of all, our theory foundation is mainly correlative to the cognitive linguistics, such as the Case Grammar, frame theory, figure/ground theory, and target/reference theory; it is no doubt that people can also find some kinds of theories about psychology are adopted in the dissertation as our experimental basic, mainly the network model theory about knowledge structure. Secondly, we adopt the predicative analysis to describe the deep semantic structures of compound words, and formalization to denote the words semantic frames. We also use the quantity statistics to search the rules which can be embodied definitely by quantity in a relatively close range of corpus.
本着这一观点,本文的研究在以往研究的基础上主要作了以下突破:理论上,主要运用了认知语言学的相关理论作为本文的立论依据,如格语法理论,框架理论,图形/背景理论,目的物/参照物理论等,并运用了心理学的有关研究成果来作为本文的实验支持,主要有知识结构的网络模型理论;方法上,运用了述谓结构分析方法来描述复合词的深层语义结构,运用了形式化方法来表示构词的语义框架,运用了定量研究方法,对一个相对封闭的语料作了量化统计,在定量的基础上寻找规律。
10. Two kinds of image retrieval reference frames are compared mathematically, and it is found that the polar coordinates facilitate processing multi-scale images.
采用数学分析的方法比较了图像检索算法中常用的2种坐标系,发现极坐标更加有利于图像的多尺度处理。
11. The question of frames of reference was entirely omitted from Chap. 3 but is treated in some detail here.
参照系的问题在第三章中完全避而不提,在这里却要作比较详细的论述。
12. The coupled lateral-torsional motion equations for a bearing-rotor-gear coupling system in the rotating reference frames are developed based on the Lagrange''s Equations, and the mechanism of lateral-torsional coupling of the system is discussed thereby. The approximately linear modal analysis for the system is carried out and the characteristics of the coupled lateral-torsional vibration is analyzed theoretically.
第二,根据内齿轮副的啮合条件,导出了在不脱齿时内齿轮副所满足的约束方程,基于拉格朗日方程在旋转坐标系中建立了轴承—转子—齿轮联轴器系统的弯扭耦合运动方程,讨论了系统的弯扭耦合机理。
13. This article provides the reference forthe application of partially prestressed concrete frames with unbonded tendons in earthquake area.
本文的研究为无粘结部分预应力混凝土框架在地震设防区域的应用提供参考。
14. The estimability of selenodesy parameters from space VLBI observables is discussed. The key point is the transformation of different reference frames and the estimability of selenodesy parameters. This research is the basis to estimate the selenodesy parameters.
针对深空探测备受关注的背景,探讨了空间VLBI 技术对月球大地测量参数的可估性,重点分析了不同参考系下的坐标转换问题和月球大地测量参数的估计结果,为解算月球大地测量参数提供了理论基础。
15. The methods of calculating the DCT coefficients of the matching blocks from the derived DCT coefficients of the blocks in the reference frames under three different prediction modes of MPEG-2 is discussed, based on which a drift-free MPEG-2 transcoder that achieves motion compensation in the frequency domain is proposed.
摘 要:本文针对MPEG-2三种不同的预测方式,讨论了由参考帧中各块的DCT系数直接求得匹配块的DCT系数的方法,提出了频域内运动补偿的概念和基于频域的无偏视频码率转换技术。
16. The aim of this study was to investigate the differences of brain dynamics between the use of allocentric reference frames and egocentric reference frames during spatial navigation.
空间巡行的策略,可依照参照系的不同,分成自我和环境两种空间表示方式。本研究以脑电波探讨汽车驾驶中,此两种参照系於空间巡航中脑波反应之差异。
17. Based on the extrapolated phase time theory, we show that the group velocities of modified Bessel waves are superluminal; an alternative theory to describe photon tunneling is developed, and at the second-quantized level, a rigorous argument for the superluminality of evanescent modes is presented; a quantum Lorentz transformation between classical and quantum reference frames is studied, from which the conclusion that a particle can propagate over a space-like interval is obtained, which is due to the Heisenbergs uncertainty relation and in agreement with quantum field theory.
用外插相位时间理论证明虚宗量的Bessel波存在超光速行为;建立光子隧穿的替代理论,在二次量子化的基础上严格论证了隐失波的超光速行为;利用量子Lorentz变换进一步论证了粒子的超光速运行的可能性,得到的结果与量子场论方法相符。
18. The I frames in two adjacent GOP was examined to find if there were shot cut whitin the GOP; the area of the cut was located by analyzing the slot and the exact frame where the shot cut occurred was found by examining B frames between two reference frames.
通过对相邻I帧的检测,確定一个GOP中是否存在镜头切变;通过对slot的分析,確定镜头切变在GOP中所处的区域;通过对B帧的检测,確定镜头切变发生的確切位置。
19. Under the hypothesis of steady flow, the RNG k-εturbulence model and RANS equations in multiple reference frames were used to simulate the flow fields.
为了分析离心泵在设计工况运行时叶轮盖板两侧泵腔内流场结构的特点,采用RNG k-ε湍流模型和多重参考系下的雷诺时均N-S方程,对由叶轮通道、蜗室、泵腔和密封环间隙组成的计算域进行定常数值模拟。
20. Based on four different reference frames, namely absolute angle synchronized reference frame, relative angle synchronized reference frame, reference frame in which some machine is taken as reference machine, and inertia center reference frame, methods of forming linear space model of multi-machine systems are introduced.
介绍了多机电力系统在4种参考坐标系:绝对功角同步旋转坐标系、相对功角同步旋转坐标系、某一机组参考系和惯性中心参考系下的线性空间数学模型的形成方法。