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During VVI pacing, ventricular EAS was located at the right ventricular apex, thus resulting in an antidromic ventricular activation sequence from cardiac apex to base, as manifested by the delay and dispersion in phase, while the PS, FWHM and PSD were reduced as compared with those before VVI.

心室激动顺序和心室收缩同步性是维持正常心室功能的重要因素，在时间和空间上保持心室舒缩活动处于一个协调有序的工作状态，从而保证心室射血的力学效应，产生最佳的血流动力学效果。

Combining the definition of CWT and the derivative property of convolution, we constructed a general method to calculate the approximate derivative of signal through CWT by using the first and second derivative of Gaussian function, Haar, and the first derivative of three-order-Spline function as wavelets. As compared with the other approaches of calculating derivative, which include the numerical differentiation, polynomial filters, Fourier transform, and the recently proposed DWT method, fast calculation and simple mathematical operation were remarkable advantages of CWT method. For the signal corrupted by severe noise (Signal-toNoise Ratio=5), the satisfactory results could also obtained via CWT method through appropriately adiusting the dilations.

在此基础上，(1)结合连续小波变换的特点和卷积的微分性质，提出了使用Gaussian函数的一阶和二阶导数，Haar和三次样条函数的一阶导数作为小波函数的连续小波变换计算信号近似导数的一般性方法，与其他导数计算方法(包括数字微分法，多项式滤波法，Fourier变换法和离散小波变换法)相比，本法简单便捷，计算速度快，对于噪声含量较高的信号(S/N为5)，只要适当调节尺度即可获得比较满意的结果。

As compared with other work, the features of the thesis are as follows

因此，与以往的工作相比，本文的工作具有如下一些特点

More asperities tend to interact with each other and affect the central contact zone in elastic-plastic contacts as compared with elastic contacts. The change of spacing and radius of asperities and indentation depth would influence the asperity interaction.

同弹性接触相比，在弹塑性接触过程中有更多的邻近粗糙峰对中心接触区发生作用，改变粗糙峰的间距、曲率半径和压下深度都会对其产生影响。

Therefore, D-regions may be considered as pontine storage center as compared with Barrington's nucleus.

因此，与 Barrington's 核相比，可将 D 区视为脑桥储尿中枢。

Therefore, Dregions may be considered as pontine storage center as compared with Barrington's nucleus .

因此，与Barrington's核相比，可将D区视为脑桥储尿中枢。

The results indicated that different organic fertilizers significantly affected the accumulation of nitrate in lettuce in both open field and plastic tunnel, lowest nitrate content occured in treatmants with cattle manure and well-composted chook manure, while bean cake and pig manure increased nitrate content as compared with the control.

本试验主要研究了在露地和大棚条件下不同有机肥对生菜硝酸盐积累的影响，以期为通过有机肥控制蔬菜硝酸盐积累提供理论依据。1材料与方法以结球生菜为试材，品种为皇帝。露地试

As compared with the existing work in this field, the results given in this paper is simple, and suitable for any robotic manipulators with unknown dynamics nonlinearities.(3) The proposed control scheme excludes the assumption that is often used in the existing literature, i.e., the robot states are assumed to be within a compact set.

与现有方法比较，本文给出的结果比较简单，适合于任何动力学非线性未知机械手的控制；提出的设计方法，克服了现有机械手神经网络控制应用中所需要的假设条件，即假设机械手的状态量严格位于某一紧集中。

The present study demonstrated that the distensibility of the ascending aorta was reduced in patients with aortic dissection as compared with that of both hypertensive patients and normal subjects.

本研究试图通过与年龄和性别匹配的正常人和高血压患者进行对比，用无创的超声技术，对主动脉夹层的升主动脉弹性特征进行实时研究。

The new sieve tray tower of carrier gas evaporation can be installed with multiplayer sieve trays, and has double concentration ratio as compared with that of general sieve tray towers, and can be operated under vacuum conditions, which can avoid the leakage of acrylamide.

依据新方法开发的新型载气蒸发筛板塔可采用多层塔板操作，该塔与未设置加热管且塔板较少的情况相比，浓缩比可以提高1倍；采用负压操作，可以避免丙烯酰胺泄漏。

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。