对窗

The implementation steps are that the seismic data is collected; the Fourier transform is made for the seismic data at a certain time window; a low pass filter operator of the time domain with an interception frequency of FE and a sampling rate of DT is calculated, which is taken as the equivalent N point smooth operator; FE and DT satisfy the equation that FE*DT is equal to X*DF*1.024; the estimate value of the amplitude spectrum of the seismic wavelet and the reverse wavelet are obtained, which are convoluted with the original seismic data; and the deconvolution seismic data of the time window is obtained.

实施步骤是采集地震数据，对某一时窗的地震数据做傅立叶变换，计算截止频率为FE和采样率为DT的时间域低通滤波算子作为等效N点平滑算子，FE与DT满足FE*DT＝X*DF*1.024，进而得到地震子波振幅谱估计值和反子波，再与原始地震数据褶积，得到该时窗的反褶积后地震数据。

Angular spectral is spectral value map formed by estimating semblable coefficients of fast and slow shear wave or the variation of amplitude ratio of fast and slow shear wave with times and angles at a specified space point based on semblable theory of fast and slow shear wave, the angle value of this space point at a given time can be got by picking the maximum of angular spectral; the study reveals that fast and slow shear wave with different polarization direction should be separated using different rotation formula, eight formulas of separating fast and slow shear wave using clockwise rotation and counterclockwise rotation have been derived, and gained energy assignment rule and phase coincidence rule, in real data estimation, the rotation formula used for separating fast and slow shear wave can be uniquely determined on the two discriminating rules. On the basis of semblable theory of fast and slow shear wave, the delay time corresponding to the maximum of semblable coefficients at a specified point in a given time window is the delay time of fast and slow shear wave, delay time section of fast and slow shear wave can be got by moving space point and smoothing time window. The vertical variation values of delay time of fast and slow shear wave reflect the effect degree of vertical fractured reservoir on fast and slow shear wave which is defined as anisotropic coefficient, and section map of anisotropic coefficient can be obtained.

角度谱就是利用快慢横波的相似性原理，在某一空间点求出快慢横波的相似系数或快慢横波的振幅比值随着时间和角度的变化而形成的谱值图，拾取其极大值就得到该空间点某一时间的角度值；在研究中发现分离不同偏振方向的快慢横波应该采用不同的旋转公式，推导出了利用顺时针旋转和逆时针旋转分离快慢横波的八个公式，并给出了能量分配准则和相位一致性准则两个判别准则，在实际计算中利用这两个判别准则能唯一地确定分离快慢横波的旋转公式；根据快慢横波的相似性原理，在某一给定点和给定时窗内最大相似系数对应的延迟时间就是快慢横波的延迟时间，随着空间点的移动和时窗的滑动就可以得到快慢横波延迟时间的剖面图；快慢横波延迟时间与慢横波传播时间的比值定义为裂缝密度，并求出了裂缝密度剖面图；快慢横波延迟时间纵向上的变化值的大小反映了纵向上裂隙层对快慢横波影响的大小，定义为各向异性系数，并求出了各向异性系数的剖面图。

Objective To investigate the effects of recombinant tissue-type plasminogen activator combined with mild hypothermia on the hemorrhagic transformation after cerebral ischemia-reperfusion within or out of the therapeutic time window in rats.

目的观察缺血3h时间窗内和超过时间窗采用重组组织型纤溶酶原激活剂和rt-PA联合亚低温对脑缺血再灌注后出血转化干预的效果。

Furthermore, we analyzed the possible mechanism. Methods: We established the arterially perfused rabbit left ventricular wedge preparations to record transmembrane ECG and action potentials of the epicardial cells and endocardial cells simultaneously. We divided two groups by setting the location of premature beats.

本试验以冠状动脉灌注兔左心室楔形组织块标本为研究对象，观察期前刺激位置对单向传导阻滞的时间易损窗的影响、单向传导阻滞和折返激动时间易损窗的关系及折返起源部位等，并分析其可能机制。

We synthesize the beamlet source and beamlet records in the wavelet domain using both rectangle and Gaussian windows and then extrapolate the synthesized data with a Fourier finite-difference operator.We test the method using the standard Marmousi model.

我们在小波域中，分别应用矩形窗和Gaussian窗合成了小波束源和小波束记录，并基于傅立叶有限差分算子，对marmousi模型进行了叠前深度偏移试算。

Because of the arch effect, the local bearing strength and the tributary area of locally bleared masonry under load_bearing wall between windows are different from the common masonry, and the calculation formula is put forward and has been revised.

根据混合结构承重窗间墙窗过梁下的局压砌体的内拱效应、局压强度、受荷面积不同于一般楼盖梁端局压砌体的特点，对其承载力计算公式提出探讨并作修正，较好地反映实际情况，同时需作进一步试验和研

The results supply a research basis for understanding microclimatic formation of canopy gap, the regeneration of forest canopy gap and for studying impacts of biodiversity.

其结果可为进一步研究林窗小气候形成机制提供研究基础，为研究林窗更新以及对生物多样性影响提供科学参考。

The seedling establishment of Tsuga longibracteata in elliptical gap (area 118 m^2) center, middle, edge and under canopy of T. longibracteata forest were studied by seed burial experiments from December 2003 to January 2005 in Tianbaoyan National Nature Reserve of Fujian,China.

通过2003年12月到2005年1月对福建省天宝岩国家级自然保护区长苞铁杉林内椭圆形林窗（面积118平方公尺）中心、中部、边缘和林下样地进行种子埋藏及幼苗定位观测实验，研究了长苞铁杉幼苗在林窗不同位置中的建立。

Then based on CWMS, we propose a new method to enhance the resolution of seismic traces. Firstly, we divide the seismic signal into proper segments by Gabor molecule-windows adaptive to the signal, where each segment is regarded stationary, and then transform it into the Gabor domain. Secondly, we deal with the amplitude spectrum for each segment to expand the frequency band of the spectrum in the Gabor domain. Finally, taking inverse Gabor transform on modified time-frequency coefficients, we get the high-resolution signal.

然后基于变子波模型，提出了一种新的提高地震记录分辨率的方法：第一步，用自适应于地震记录的Gabor分子窗把地震记录恰当地划分成若干片断，每段内信号近似平稳，然后将地震记录变换到时间-频率域；第二步，在变换域对每个分子窗内信号的振幅谱进行处理以拓宽频带；最后把处理后的时间-频率域函数反变换回时间域得到提高分辨率后的结果。

Focusing on the unique characteristics, multi-driven and structure-alterable two-vehicle, of the dexterous window-cleaning robot, this paper puts forward a completely distributed robot system with cell structure and distributed intelligence.

本文针对灵巧擦窗机器人的多驱动、可构形双车体的特点，提出了一种&单元结构、分布智能&概念的完全分布智能式机器人体系结构，并且，在此基础上对灵巧擦窗机器人控制系统的实现结构、全局规划、运动学模型、镇定和跟踪、分布式软件结构和实现、硬件系统的研制等方面的问题进行了深入的研究。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。