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The definition and stability criterion of resonant operating points in a CPT system have been described. A Poincarémapping model has been built up and its Jacobian matrix has been derived with the implicit function derivative rule and chain rule. Then the stability of the fixed points can be determined according to the eigenvalues of the the Jacobian matrix. It has been used to study an example push-pull CPT system with three resonant operating points.

文中给出了CPT系统中谐振点的定义及判断条件，建立了系统的庞加莱映射模型，并根据隐函数及复合函数求导法则，推导出了系统庞加莱映射周期不动点的雅可比矩阵，根据雅可比矩阵的特征值分布情况，即可判断各不动点的自治振荡稳定性。

Based on the research results of Chaos theory, in this dissertation, it has made detailed analysis of the chaotic signal generator. Firstly, the characteristic and various detection methods of chaotic signal are recommended. Secondly, with the aid of software, such as MATLAB, PSPICE, EWB, etc, discussion of the process of generating chaotic signal proceeds. Through simulation, the output result of several kinds of chaotic circuit are analyzed and compared. Thirdly, aiming at Chuas chaotic circuit, through debugging, the impacts by components and parts in the circuit, such as operation amplifier, capacity, inductor, etc, has been further investigated. And then provides a new scheme to implement Lorenz chaotic system, the circuit design and analysis are presented in detail and it can be realized by the hardware of programmable arrays FPGA, the experimental results indicate that this scheme has the advantages of easy operation, flexible design and high efficiency. An application example in secure communications is also provided. Finally, through picking up the characteristic parameter-Lyapunov exponent of the Chaos we can analyze the performance of different chaotic signal generators.

本文在混沌理论研究成果的基础上，对混沌信号的产生做了详细的分析，涵盖以下内容：首先介绍了混沌的定义，混沌信号的基本特性和各种判别方法，特别是对简单的一维Logistic映射的硬件实现问题做了初步探索；其次对混沌信号的产生方法进行讨论，借助于MATLAB、PSPICE、EWB等仿真软件，对几种混沌电路输出的混沌信号进行了分析比较，并在此基础上针对典型三阶连续自治系统Chua's电路作进一步实验研究，通过混沌电路调试，深入研究电路中各元器件，特别是运算放大器、电容、电感等对混沌信号时域以及频谱的影响；再次研究连续混沌系统的数字化硬件产生，设计了Lorenz混沌电路在现场可编程门阵列FPGA上实现的新方案，在保密通信中的应用实验结果表明该方案具有操作简单、设计灵活、效率高等优点；最后针对不同混沌系统，采取不同算法，提取混沌特性参数Lyapunov指数，进而对不同的混沌信号发生器的性能进行了分析。

A sense of his large audience, and of responsibility to America and the American language, has perhaps helped him escape the self-satisfied chattiness that disfigured his poems of the 1980s; what he has lost in Californian ease he has gained in sterner self-restraint.

的感觉，他大的观众，并负责向美国和美国的语言，有可能帮助他摆脱自我满意繁琐毁容他说， 20世纪80年代诗歌是什么，他已经失去了他在加州赢得轻松在严峻的自我克制。

Mu Mu extension of the public, from the beginning and Chimu is in the students, gave the impression has been a very mild with glasses of boys, has never had a temper, has never been like the Chimu and problems of children Corps as "exaggerated" burning, When a dispute over the side of the Quanjie he always seems to.

木暮公延，从国中开始和赤木就是同学，给人的印象一直是一个带着眼镜很温和的男生，从来没有发过脾气，也从来没有像赤木和问题儿童军团那样"夸张地"燃烧起来，发生争执的时候在一旁劝解的好像也总是他。

Core adjusting rolling bearing type 22300 has 2rows of symmetry rolling spherical and copper alloy suppting frame,there is no fixed circlip in inner circle,the roller is the longer type,it has the abillity to support more load,the circlip will lead while moving,it has the better performance of core adjusting,also it can compensate the tolerance of coaxiai degree.

调心滚子轴承22300CA型具有两列对称球面滚子和铜合金实体保持架，内圈无固定挡边，滚子加长，承载能力大，活动中挡圈由内圈引导，调心性能良好，能补尝同轴度误差。

In the paper, the math model of the fitting machining benchmark curve of stone slice has been given, which used on the handrail of eddied ladder , and circular helix has been used to bi a fitting curve, the general control machining linear slicer of stone, and has resolved the practical question on the machining of stone.

本文给出了旋转扶梯扶手石材贴片的加工基准曲线拟合的数学模型，以空间螺旋线作为拟合线，并给出用c语言编写的通用处理程序，为石材数控线切割机提供了理论基础，解决了石材加工行业中的实际问题。

This text accords with the country and sustainable development strategy of Tianjin, regard building the economy society of circulation as the long-range objective, has combined the economy of Tianjin and current situation of the development of the society. It considers the water resource shortage in Tianjin and characteristic of the resource inputting type city abundantly. It adopts the scientific and technological demand for the development circular economy in Tianjin of many kinds of methods to predict through the survey of typical enterprise and area. In addition, the great scientific and technological question that it has put forward Tianjin and developed circular economy, and the method to analyze with the level is arranged in an order. It has also proposed Tianjin develops the circular economy guarantee measure.

本文根据国家和天津市可持续发展战略，结合天津市经济和社会的发展现状，以建设循环经济型社会为长远目标，充分考虑天津水资源短缺和资源输入型城市的特点，通过对典型企业和区域的调查，在深入分析天津市发展循环经济的科技现状和差距的基础上，整合多种方法对天津市发展循环经济的科技需求进行预测，提出天津市发展循环经济的重大科技问题，并用层次分析的方法对其排序，进而提出天津市发展循环经济的保障措施。

The assay of DPPH free radical clean test best is Cissus pteroclada, it has over 95%, in anti-liver lipid peroxidation assay, the best is Ampelopsis cantoniensis, it has over 95% too, and Ampelopsis Japonica has well effect on killing human breast cancer cells MCF-7 but have no effect about anti-oxidation.

抗肝脂质过氧化试验中以广东山葡萄最好，其抑制率有95%以上。白蘝对於抗氧化虽然无特别效用，但在人类乳癌细胞株MCF-7毒杀试验上有很好的成效其抑制细胞生长率为95%以上。

Reductive conversion of geraniol to citronellol is adopted as a model reaction, and several factors in the reaction are discussed using gas chromatography method. The influence of n-hexane and butyl acetate, as organic solvents, on biocompatibility was studied; the influence of methanol, ethanol, glycol, n-butanol and 1-hexanol, as energy substance, on the transformation efficiency was compared, respectively; the catalysis capabilities of Baker's yeast, XST-KO yeast, LP yeast, alcohol yeast, dry yeast, Saccharomyces cerevisiae, Angel yeast and Meishan yeast were discussed. It has been proved that biocompatibility of n-hexane are much better than that of butyl acetate, and the hexane has been demonstrated the most effective in terms of the influence on biotransformation, Baker's yeast has shown the highest tranformation efficiency among the eight yeast strains.

以香叶醇转化为香茅醇作为模型反应，通过气相色谱法进行定性和定量分析研究了影响该有机相生物转化反应的几个基本因素，考察了两种有机溶剂正己烷和乙酸丁酯对生物相容性的影响，选用甲醇、乙醇、乙二醇、正丁醇和l-己醇分别作为能量物质进行实验，比较其对转化的影响并探讨了Baker's酵母、XST-KO酵母、LP酵母、酒精酵母、假丝酵母、干酵母、安琪酵母和梅山酵母八种不同酵母作为生物催化剂对模型反应的催化能力，结果表明，正己烷作为有机溶剂，其生物相容性明显好于乙酸丁酯，更加有利于该生物转化反应进行；乙二醇作为能量物质，该模型反应转化率最高；而 Baker's酵母作为生物催化剂，对该模型反应的催化能力最强，最适合作为该模型反应的催化剂。

S has always put the greatest emphasis on market freedom and it also has the most commercialized media, hence the country has the longest and most influential civic media reform movement.

美国一直是资本主义国家中最强调市场自由的国家，其媒介所受的市场挤压也更为强烈。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。