Such pulsewidth and peak power introduces extreme physical conditions such as high temporal resolving power , strong electromagnetic field and high pressure . and these introduced a comprehensive and profound revolution in fundamental and technology science 这样的脉宽和功率密度带来了实验室前所未有的高时间分辨率以及强电场，强磁场，高压强和高温度的极端物理条件，引发了基础科学和技术科学一场广泛而深刻的变革。
Meanwhile , a synchronous signal is generated to be the start signal of the high speed snapshot . in this case , the effective length of the film is increased enormously , which means that the resolution of the camera may be improved at the same rotating speed 而且在测速的同时产生了一个高精度的同步信号作为高速摄影的触发信号源,使得用于记录信息的胶片的有效使用长度得到了很大的提高,这就意味着转镜相机的时间分辨率在相同的转速下得到了提高。
It has a higher frequency distinguished - degree and a lower time - distinguished degree in low frequency part . as high frequency part , it is the other way around . so wavelet is adapt to probing the instantaneous abnormal phenomena of signal exactly and to show its components 小波分析是一种时频分析方法，它在低频部分具有较高的频率分辨率和较低的时间分辨率，在高频部分具有较低的频率分辨率和较高的时间分辨率，很适合探测信号中的瞬态反常现象并展示其成分。
In this paper , we propose several techniques to improve heterogeneous transcoding performance , which is transcoding from mpeg - 2 to mpeg sp @ ml . bit - rate , frame rate and spatial resolution transcoding are all studied here . first , we compared the difference between mpeg - 2 and mpeg - 4 本文以mpeg标准间视频流转码为背景，主要研究了mpeg - 2到mpeg - 4sp @ ml (简单框架主级， simpleprofile @ mainlevel )的转换编码，其中包含了码率、空间分辨率和时间分辨率转码的内容。
Integrating multirate signal processing theory and classical spectrum estimation theory , a brand new multiresolution spectrum theory is provided and a special algorithm is discussed in great detail . the polyphase decomposition theory is also applied to optimize the algorithm and improve the computing efficiency 本文结合多抽样率信号处理理论和传统谱估计理论，提出了崭新的多分辨谱估计理论，并给出了具体的实现算法，解决了谱估计中如何达到频率分辨率和时间分辨率的最佳组合的问题。
A wavelet analysis is introduced to detect and diagnose faults occurred in the ehs system . as well known , wavelet analysis is referred to as a mathematical microscope . it takes advantage to fourier transform in its multi - resolution analysis both in time domain and in frequency domain 众所周知，由于小波分析具有良好良好的时?频特性，即在低频部分具有较高的频率分辨率和较低的时间分辨率，在高频部分具有较高的时间分辨率和较低的频率分辨率，而被誉为“数学显微镜” 。
Besides , the sedimentary facies of upper ganchaigou and lower ganchaigou formation were also mapped in supersequences which are the main target strata for exploration . the high resolution sequence stratigraphic framework showed the genetic relationship between the distributions of sedimentary facies and their tectonic settings . the near - source sedimentary systems such as subaqueous alluvial fan and lake - floor fan are often deposed in rise - hemicycles in the steep slope background in the north , the coarse lithology of fan - delta prograded from north to south in fall - hemicycles , and the braided stream facies are formed in the rise - hemicycles in gentle slope background in the south , braided stream facies prograded from sorth to north in the fall - hemicycles , but the lacustrine facies and salt lake facies developed in the middle part of the area 详细的沉积相研究发现，红狮地区第三系发育有冲积扇、水下冲积扇、河流、三角洲、扇三角洲、湖泊和湖底扇7种主要沉积相类型，并对作为区内主要勘探目的层系的下干柴沟组和上干柴沟组进行了以超层序为单位的沉积相平面编图，以较高的时间分辨率揭示了区内沉积相带的平面展布及其在不同构造背景中的分布规律，比如在北部的凹陷陡坡背景下，上升半旋回低水位期通常发育有水下扇、湖底扇等陡岸近源特征的沉积体系，下降半旋回高水位期，扇三角洲相粗碎屑岩由北向南进积;在南部的凹陷缓坡背景下，上升半旋回主要发育辫状河流相，下降半旋回辫状河三角洲相由南向北进积;而中部红柳泉一狮子沟一带则为湖泊相沉积和盐类沉积。
Bottom - up processing and feature detecting theory based on strong electrophysiological evidences has played a dominant role in the visual research for long time . people know top - down processing just by common sense . knowledge or experience are recalled from memory by reactivation of their neural representations and affected visual processes . however recently , researches from human and monkey provide experimental evidences for top - down processing . first , mnemonic representation of visual objects and faces , located in the ventral processing stream of visual perception in monkey , provide the best evidences of how neuronal codes are created by neurons that have the special ability to link the representations of temporally associated stimuli ; second , experiments suggest that not only bottom - up signals from the retina but also top - down signals from the prefrontal cortex can trigger the retrieval of associative codes , which may serve as a neural basis both for the conscious recall and for the visual processes affected by top - down processing further studies will improve people s understanding of the causal relation of activation and behavior by use of combined fmri and electrophysiology or lesion studies 联想性编码是通过学习由一些具有特殊功能的神经元建立的，这些神经元具有将时间性关联刺激的表征联系起来的能力。其次，不仅来自视网膜的底-顶信号，而且来自前额叶的顶底信号都能触发联想性编码的提取，既可以作为有意识回忆的神经基础，又是顶-底加工影响视觉过程的基础。脑损伤病人研究具有高时间分辨率的人类功能性核磁共振成像functional magnetic resonance imaging , fmri和猴fmri研究以及猴细胞电生理分析相结合,将进一步加强人们对视觉脑机制的全面理解。
It has a character of multi - resolution , and can be used to characterize detailed features in both time and frequency field . the dimension of the window is constant , but its shape is variable . that is to say , in low frequency band , it has high frequency resolution and low time resolution ; in high frequency band , it has low frequency resolution and high time resolution , which is fit for analyzing requirement of engineering signal 小波变换是信号时间?尺度(时间?频率)的分析方法，它具有多分辨分析的特点，而且在时频两域都具有表征信号局部特征的能力，是一种窗口面积固定不变但其形状可改变的时频局域化分析方法，即在低频具有较高的频率分辨率和较低的时间分辨率，在高频部分具有较高的时间分辨率和较低的频率分辨率，这符合工程信号分析的需要。
