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Paul Erds once posed the following problem about real line R: is it true that, for every infinite set X, there is a closed set E with positive lebesgue measure such that E doesn't contain any subset similar to X (I.e., there is no subset of E, which is a linear homeomorphic image of X). In 1984, K. J. Falconer proved the following: for a decreasing sequence of positive numbers {xn} such that \%lim\%xn=0 and \%lim\%(xn+1)/=1, Erds problem has a partial positive answer.

叶盛 Paul Erds曾提出如下关于实直线R的问题：是否对R的每一个无限子集X，都存在一个具有正测度的闭子集E，使得E的任何子集都不相似于X(E的任何子集都不与X线性同胚)。1984年，Falconer证明了如下结论：对于一个满足limxn=0和lim(xn+1)/=1的单调递减的正实数列{x n}，Erds问题有一个部分肯定的解答。

An impulsive control scheme of the Lur'e system and several theorems on stability of impulsive control systems was presented, these theorems were then used to find the conditions under which the Lur'e system can be stabilized by using impulsive control with varying impulsive intervals. The parameters of Lur'e system and impulsive control law are given, a theory of impulsive synchronization of two Lur'e system is also presented.

提出了Lur'e系统的脉冲控制系统，利用关于脉冲系统稳定的几个定理，得到了具变化的脉冲区间的Lur'e系统镇定的充分条件；并且给出了Lur'e系统的适当参数与脉冲控制律，使得两个Lur'e系统脉冲同步。

The sufficient conditions to guarantee robust exponential stability for the closed-loop systems are obtained based on Linear Matrix Inequality, moreover, the approach of design of robust H# output feedback controller is introduced.3 The problem of reliable H# control for a class of Lur"e systems with polytopic uncertainties is studied when all control components are operational as well as when some control components experience failures, the design approach of reliable H# controller is also obtained.4 Considering a class of uncertain Lur"e singular system with time-delays, the problem of robust stability is investigated based on Barbalats Lemma and nonsingular linear transformation of model reduction.

针对一类不确定Lur'e奇异时滞系统，基于Barbalat引理以及非奇异降阶变换，讨论了Lur'e奇异时滞系统的鲁棒稳定问题，提出了鲁棒H_∞状态浙江大学博士学位论文反馈控制器的设计方法。5、针对一类具有饱和执行器的不确定Lur'e奇异系统，提出了时滞依赖的鲁棒稳定与鲁棒二次镇定的充分条件，所的结果不需要参数的整定。6、针对任意协方差有界的有色噪声，讨论了一类不确定Lur'e奇异系统的鲁棒凡滤波问题，得出了鲁棒几滤波器设计的充分条件。7、针对一类不确定Lur'e时滞系统，通过线性变换，把它转换成奇异系统，根据奇异系统鲁棒控制理论所得出的鲁棒稳定与鲁棒镇定控制器设计的充分条件具有很小的保守性。

In simple view mode, only the filename is displayed and thus each entry takes only one line of the screen:In extended view,the date of modification and size of the file are added (date and number of entries for a directory, size and free space for a drive):ShortcutsLong press on the numerical keyboard will also quickly move you to 9 predefined locations of the file system:1: C:2: E:3: Z:4: C:\Logs5: C:\Data6: C:\System7: E:\8: E:\Data9: E:\SystemThere is currently no way to modify customize these locations but we plan to introduce this in the future.

在简单的视野模态中，只有文件名被显示和如此每个进入拿只有荧屏的一条线：在广大的视野、修正的日期内和文件的大小被增加(日期和进入的数字为一个目录，大小和自由的空间为驾驶)：ShortcutsLong 杂志报纸在数字的键盘上也将会很快地移动你到文件系统的 9个被预先定义的位置：1： C：2： E：3： Z：4： C：\ Logs 5： C：\ Data6： C：\ System7： E：\8： E：\ Data9： E：\ SystemThere 是现在没有方法修正定制这些位置但是我们计划未来介绍这。

Methods The left ventricular diastolic function,the blood speed during quick filling phaseof left ventricular of the mitral valve orifice,the peak value of the late phase of left ventricular diastolic pariod;E/A ratio,the time for isovolumetric relaxation phase of left ventricular,the reducel time of peak E,and the distance between peak E of mitral valve and intervertricular septum of left ventricular were measured respectively.

摘要］ 目的应用彩色多普勒超声心动图测定冠心病左室舒张功能，临床提供可靠的诊断及治疗依据方法分别测定冠心病组及对照组的左室舒张功能：二尖瓣口左室快速充盈峰值血流速度即E峰；左室舒张晚期峰值速度即A峰；E/A值，左室等容舒张时间，E峰减速时间，二尖瓣叶E峰与室间隔左室面的距离。

To investigate the kinetic isotope effect of Ti-Mo alloy hydrides, E of the deuterides is compared with that of the protides. When x=0.03, E of deuterium desorption is larger than that of protium desorption. When x=0.13 and 0.25, E of protium desorption is larger than that of deuterium desorption.

结果显示，x=0.03时，合金氕化物E小于氘合金化物E，与钛放氢动力学同位素效应一致；x=0.13、0.25时，氕化物E大于氘化物E；x=0.50、1.00时，氕化物与氘化物的E差别不大。

A preliminary study on substrate specificity of Lumbricus Bimastus nucleaseTo measure degrade rate of DNase E to several different substrate in optimal reaction condition to demonstrate the substrate selectivity of DNase E. Agarose gel electrophoresis was used to investigate the products of DNase E processing double strands cyclic DNA to investigate the action of DNase E.

双胸蚓组织核酸酶底物特异性的研究测定DNase E在最适反应条件下对不同底物的降解速率，证明DNase E降解底物的选择性；应用琼脂糖凝胶电泳对DNase E水解双链环状DNA后的产物进行鉴定，阐明DNase E的水解方式。

There are no prominent variations of the micas in Li, F, Mn and Rb between zone c and zone d but sharp changes in these elements between zone d and zone e. In contrast to the primary micas in zone e, the altered micas in zone e show higher in F and Li but lower in Al. From zone a to zone e, the micas do not show remarkable variation in Na+K.

从c带到e带，随着Fe、Mg和Ti的减少，总体上表现为Al、Li递增，F、Mn和Rb递减的演化方向，但Li、F、Mn和Rb在c带和d带之间变化不明显，d带和e带之间却表现出急剧的变化。e带中的次生云母与原生云母相比，前者F、Li高而Al低，从a带到e带，Na+K变化不明显。

The French and Italian poets gave preference to the Italian form of sonnet—two groups of four lines, or quatrains (always rhymed a-b-b-a a-b-b-a) followed by two groups of three lines, or tercets (variously rhymed c-c-d e-e-d or c-c-d e-d-e)—which created a sonorous music in the vowel rich Romance languages, but in Shakespeare it is artificial and monotonous for the English language.

法国和意在利诗人优先使用意大利格式的商籁诗----两组四行诗（总是按a-b-b-a a-b-b-a的格式押韵）加上两组三行诗（按c-c-d e-e-d或 c-c-d e-d-e格式押韵），这就在元音丰富的罗马语言中产生了一种感人的音乐节奏，然而放在莎士比亚的英语作品里，就变得矫揉造作和枯燥单调。

Blue Nile originated in the Ethiopian highlands at an elevation of 1830 meters of Lake Tana, the plateau rainy and humid, water, a larger flow of 1640 cubic meters mouth of seconds, while the E White Nile is only 845 cubic meters seconds, half of the Blue Nile, and another Art E Bala river runoff flow of 392 cubic meters seconds, except for losses along the way, the average flow of the Nile mouth of E is only 2200 cubic meters second in the world, the Nile River in the amount of water E is the smallest.

青尼罗河发源于埃塞俄比亚高原上海拔1830米的塔纳湖，高原多雨湿润，水量较大，河口处流量为1640立方米秒，而E白尼罗河只有845立方米秒，是青尼罗河的一半，另有阿特E巴拉河来水流量392立方米秒，除去沿途损失，尼罗河口处E平均流量只有2200立方米秒，在世界大河中尼罗河的水量E是最小的。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。