零差

According to the plane cross section assumption, configuration of a rod is expressed as a history of the cross section with arc coordinate. A special solution which stands for equilibrium in straight line state is obtained from differential equilibrium equation. Linear perturbation equation is derived and its general solution is obtained in which the integral constants are determined by constrained conditions at two ends of the rod. The condition of existence of non zero solution of the integral constants gives to the Greenhill formula of exact elastic rod model, which shows that the boundary of stable area is a closed curve and of symmetry, and inference of shearable and extensible to stability of the rod is depend on three factors: difference between flexibility of shear and extension of a section of the rod, bending stiffness and the length of the rod.

基于平面截面假定，弹性杆的位形表达为截面的弧坐标历程，根据平衡微分方程得到了两端受力螺旋作用时的直线平衡特解，导出了线性化扰动方程及其通解，积分常数根据两端铰支时的边界条件确定，并根据其存在非零解的条件得到弹性直杆精确模型的Greenhill公式，表明稳定域为一对称的封闭区域，拉/压和剪切对稳定性的影响取决于：拉/压柔度与剪切柔度之差，抗弯刚度和杆长这三个因素

Article 121 As regards all leases of land granted or renewed where the original leases contain no right of renewal, during the period from 27 May 1985 to 30 June 1997, which extend beyond 30 June 1997 and expire not later than 30 June 2047, the lessee is not required to pay an additional premium as from 1 July 1997, but an annual rent equivalent to 3 per cent of the rateable value of the property at that date, adjusted in step with any changes in the rateable value thereafter, shall be charged.

第一百二十一条从一九八五年五月二十七日至一九九七年六月三十日期间批出的，或原没有续期权利而获得续期的，超出一九九七年六月三十日年期而不超过二零四七年六月三十日的一切土地契约，承租人从一九九七年七月一日起不补地价，但需每年缴纳相当于当日该土地应课差饷租值百分之三的租金。

Based on the ARMAX model, a simple way of accuracy test is given with the residual errors and its zeros and poles.

采用ARMAX模型进行火控系统动态精度的简易测试，动态建模后经过残差检验、零极点分析等，为精度试验分析提供了一种简单方法

On the base of the relativity and the data self-sealing characteristics of circular division measurement, an arbitrary measurement system on circular division and dihedral is built, and the processing method of the dynamic data zero average and the balancing based on self-sealing nature reference are also built.

在圆分度测量的相对性和数据自封闭特征的基础上，建立了基于圆分度和二面角测量的任意角测量系统，和基于自封闭自然基准的动态误差数据零均值处理和平差处理方法。

And the solutions of the three problems above are discussed:The solution to the simulcast interfering which is caused by the simulcast delay spread and the zero-beating is given in chapter four.Based on the well understanding of the principle of MS-I/H/0 in IPNP, the examples are given in chapter five on how to solve the problem of communication interruption between paging zones.Through the analyse of signal switching between Chengdu and Deyang, the synchronization error between FLEX frames, and the bug in the multi-frequency roaming principle are pointed out. And solutions are also recommended.

通过以上分析，文章探讨了对上述三个问题的解决：·对同播干扰问题，分别分析了时延差和零拍频所造成同播干扰的客观存在，探讨了系统设计和网络优化的基本方法；·对IPNP联网障碍，提出了在掌握IPNP对各PNCC作为输入局／归属局╱输出局的灵活定义、以及相关参数配置原理的基础上，分析联网障碍的思路；·对信号切换障碍，以成都和德阳两地的局部广域覆盖为例，分析了FLEX帧失步和FLEX多频漫游原理设计缺陷的客观存在，并探讨了相关的解决方法和建议。

In the new method for two-dimensional problems the line integrals onboundary elements are converted into the evaluation of potentialfunctions at the ends of these elements.For three-dimensional cases,thesurface integrals on the usual boundary elements are transformed,through an application of Stokes'theorem,into line integrals on thebounding contours of these elements.

边界轮廓法是刚刚出现的一种新型的边界元法，该方法的核心是利用边界积分方程被积函数散度为零的特性，对二维问题，原积分方程中沿边界单元的线积分被化为单元两端点势函数之差计算，对三维问题，将边界单元上的面积分转变为沿单元轮廓的线积分，它是一种十分简便有效的边界元新技术。

The forgetting factor was optimized by reducing the trace of the input error covariance matrix. This factor is able to modify the iterative learning law of control input. The error signal of the feed-forward learning controller was filtered by a zero-phase FIR digital filter.

通过减小系统输入误差协方差矩阵迹的方式得到优化的遗忘因子，来修正控制输入的迭代学习律，同时采用零相位FIR数字滤波器对前馈学习控制器中的误差信号进行滤波处理。

So that, it's easy to deduce the correct angle by a trigonometric function equation, which can be setup using Variance derivative must be equal to zero.

利用方差导数为零建立三角函数等式，进行校正角的反向推导计算。

An electronically scanned interferometer based on a wollaston prism with a step delay line and a CCD array was used as a decoding unit.

使用一个带步进延迟线的沃拉斯顿棱镜的电扫描仪和一个 CCD阵列作为一个译码单元，设计了一个译码干涉系统与带非零组差的温度补偿压力传感器，并对温度补偿法以及串-并混合结构进行了阐

The method will become invalidation and the scatter matrix will become a zero matrix when any class or per-son has only one training pattern available.

当仅有一个训练样本时，该方法中的协方差矩阵就变成了零矩阵，方法就会失效。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。