误差的补偿

Experimental accuracy and repetition of FBG temperature sensitivity and compensation were discussed.have selected several materials which has bigger coefficient of expansion to do packaging components, have made many temperature experiments, there have not flaws, such as aging, crackle, absciss layer, packaging materials have good temperature sensitivity and compatibility with optical fiber;have designed the simple and practical packaging components, have performed a serials of experiments about accuracy and repetition of FBG wave-length, have obtained the first step conclusion;have analyzed the result and made comparison between the result of different experiment, have summarized the best packaging effect and several rules to reduce mistskes.

本文所做的主要工作包括以下几个内容：一、选取了常见的热膨胀系数大的材料制作封装元件，经过多次一80℃到80℃反复测试，封装元件没有出现老化开裂、封装裂纹、空洞、离层等缺陷，封装材料具有良好的温敏稳定性及复用性，与光纤相容性较好；二、对光纤光栅进行简单、实用的封装处理，就封装效果的优劣性、波长测量的准确度、重复性和封装时产生的波长损失等方面进行了一系列的实验，得出了初步的结论；三、对温敏和温度补偿式封装的实验数据进行了详细的分析和对比，从数字上对温变过程中光纤光栅中心波长的改变及温变曲线进行了定量的分析，在大量实验数据分析结果的基础上，总结出哪种材料封装效果更好，以及如何有效的减小实验误差。

The description of network delays including characteristics and effects are also covered and the uniformed mathematic models for NCSs with four different structures are derived. Furthermore, the controller basing on state prediction and compensating time delay is designed. Sufficient and necessary stability conditions for systems with different transmission policies such as perfect transmissions, delayed transmissions and time-varying transmissions are obtained as simple eigenvalue tests of certain test matrices. And in the end, effects of model error over maximum communication interval are analyzed. Numerical examples show the feasibility and efficiency of the proposed methods.

首先介绍了网络控制系统中数据包的传输情况以及基于模型结构方法的基本思想，并针对四种不同拓扑结构的控制网络分析了网络时延的性能，进而给出了统一的数学模型；然后，提出了基于状态预测的具有时延补偿功能的状态反馈控制器的设计方法，并针对完美传输、延时传输及时变传输三种数据传输策略，分别研究了控制系统的稳定性问题；最后分析了模型误差对最大通讯间隔的影响；仿真结果表明了设计及控制方法的正确性和有效性。

In this paper on the basis of introducing the leveling principle of a pendulum leveling instrument with a micro-bearing compensating device placed before the focusing lens ,the errors of automatic leveling of this type are analysed in theory;the methods for checking and adjusting it are discussed systematically,and at the same time some suggestions in use are also given

本文在论述轴承摆补偿器位于调焦镜之前安平原理的基础上，对该类型自动安平水准仪的误差作了系统的理论分析；对检验校正的方法作了较详细的探讨，并提出作业中应采用的方法。

The varies regression curves have been adapted to calculate moisture in order to increase device precision and overcome the shortcoming of big error at high moisture when using single curve. 3 Varies scope output signal are changed to 4～20 mA and sent to computer over the share-voltage compensation circuit. The multi channel sensor could be auto chosen to display lumber moisture in different position of the kiln. It makes the moisture distribution of lumber in the kiln clearly and drying standard accurately.

所以采用不同的拟合曲线对水分进行换算，以便提高仪器精度，并克服单一曲线造成的高含水率时误差较大的缺点；3：采用分压补偿式测量电路，将不同量程的输出信号转换成统一的4～20mA信号，送至计算机进行集中数据处理；并自动控制多路传感器的选择，分时显示干燥窑中不同部位木材的水分，使整个窑中木材水分分布一目了然，便于准确地制定干燥基准。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了