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Seven Star Crags, Reed Flute Cave, Folded Brocade Park, Fubo Hill and other like mostly the same as the number of people of the city park, is integrated with a park like the zoo is not worth, can not represent the current Guilin, Guilin, now the main feature is the Night Seven Star Park, Two Rivers and Four Lakes.

七星岩，芦笛岩，叠彩公园，伏波山，像大多是作为城市公园的人数相同外，是一个综合性公园，如动物园是不值得，不能代表目前的桂林，桂林现在的主要特点是夜七星公园，两江四湖。

Soy sauce produced using high-tech requirements of the current after the first solid dilute flavor production process, product by consumers, for 3 years and Technical Supervision Guangxi Zhuang Autonomous Region was awarded "Product quality standards approved" award; newly developed Caramel production technology is a national leader in the production of single-fold red caramel color index as high as 6.2 or above, ranking first in similar products; natural spice star anise is a specialty of Guangxi as the basis for the deep processing of The main products have star anise oil, anethole brain, such as Artemisia and grass.

公司生产的酱油采用目前高新技术要求的先固后稀增香生产工艺，产品深受消费者喜爱，连续3年荣获广西区技术监督局&质量达标产品认可&殊荣；新开发的焦糖色素的生产技术更是处于全国领先地位，所生产的单倍色焦糖色素的红色指数高达6.2以上，居全国同类产品之首；天然香料是以广西的特产八角茴香为基础进行的深加工，主要产品有八角茴香油，茴香脑和草蒿脑等。

The single a machine that should design to adopt serieses MCS-51s primarily conduct and actions main a measurement for, passing spreading feeling machine to the current of air measuring, its change is homologous pulse signal, this pulse signal through A/ D conversion with D/ A conversion after produce the certain electric voltage signal, will show the inceptive pulse signal a discharge for representing to come out at the same time.

而主要注重对其流量的检测并加以显示。该设计主要采用了MCS-51系列的单片机作为主要的芯片，通过传感器对燃气流量的测定，将其转变为相应的脉冲信号，这个脉冲信号经过A/D转换和D/A转化之后产生一定的电压信号，同时会将起初的脉冲信号所代表的流量显示出来。

The two wide used topologies of the main circuit of shunt active power filter which has the ability to compensate the neutral current are the three-leg split-capacitor topology and the four-leg topology.

具有中线电流补偿能力的并联有源电力滤波器主电路拓扑结构主要是三桥臂电容中分和四桥臂两种。

If no lightning current arresters are installed at the service entrance of the building (for example in the low-voltage consumer's installation of the low-voltage main distribution), the operator must be informed that these must be added.

如果在建筑的引入线没有安装避雷器的话，（如在低压控制中心的低压电器）必须告诉操作员，一定要把避雷器加上。

To achieve high-performance PMSM position servo system, advanced control scheme, which is static precision, transient responses and self-adaptation and anti-disturbances, is needed in practice. Based on the analysis on the features and control principles of PMSM, this thesis established its math model using id=0 vector control method. Three close loops control system, which includes current loop, velocity loop and position loop, was built up. For position loop, the main feedback loop, we chose a new adapted-fuzzy CMAC intelligent controller, which includes self-learn ability of neural net and quick response merit of fuzzy controller. Finally, the author simulates PMSM position servo system by the simulink of matlab, an advanced computer simulation tool.

本文对PMSM的控制机理和特性作了较为深入的分析；建立了PMSM的数学模型，并采用了id=0的矢量控制策略；对控制系统组成及控制方式作了分析和比较，在此基础上建立了电流环、速度环和位置环的三闭环控制系统，对作为反馈主回路的位置环采用了模糊CMAC神经网络控制方法，该方法兼具模糊控制器的快速性和神经网络的自学习能力；构建了针对PMSM位置伺服系统的模糊CMAC控制器结构及其相应的算法；利用先进的计算机仿真工具（Matlab下的Simulink）对所提出的控制策略进行了数字仿真和分析；仿真和实验结果表明本文所提出的控制策略对PMSM位置伺服系统进行控制具有良好的鲁棒性能和快速性。

Main contents are as follows :In chapter one, we give a survey to the development and current state of the oscillation of differential equations and difference equations. We also introduce some preliminary material , including some basic concepts of the oscillation theory and some important fixed point theorems.In chapter two, we investigate the oscillation of second order self-conjugate differential equation with impulses.

本文由五章组成，主要内容如下：第一章概述了微分方程及差分方程的应用背景和国内、外研究状况，这一章也包括一些预备知识，如有关微分方程、差分方程理论的基本概念和重要的不动点定理。

But there was no current modulate circuit for TDLAS system.The design of modulation circuit for tunable diode laser based on DDS has been introduced.The main idea of design is using MCU to control DDS and D/A chips,so we can get sine wave and saw tooth signals.

DDS器件采用高速数字电路和高速D/A转换技术，具备了频率转换时间短、频率分辨率高、频率稳定度高、输出信号频率和相位可快速程控切换等优点，可以实现对信号的全数字式调制。

The main purpose of this thesis is to research and develop three different kinds of battery chargers of resonant-switch converters. Starting with the zero voltage switch and the zero current switch converters, which employ the quasi-resonant converter technique, we gain the best parameters of the resonance components from the characteristic curve diagrams of these two converters. Then we design battery chargers based on these two structures and use them to experiment on lead-acid batteries.

中文摘要本论文之主要目的在於研制三种不同的共振开关式转换器蓄电池充电器，先探讨半共振式技术的零电压以及零电流转换器，利用这两种转换器的特性曲线图设计出共振元件最佳的参数值，以这两种架构作为蓄电池充电器，来对铅酸蓄电池做充电测试，经实验测得，零电压切换半共振式降压型转换器之充电器的开关在零电压的时候导通和截止。

The current main products include bamboo blinds and carpet series, wooden blinds series, reed blind series, grass blind series, paper blinds series and sea grass and sisal carpet series.

现有四大系列1000种规格的竹材产品，企业拥有自主知识产权，有较强的技术开发和创新能力，不断对竹材进行精深加工的研制和新产品的开发，2001年至今企业已获国家知识产权局批准的新产品专利590项。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。