查询词典 variable error

To realize high positioning precision and rapic response, this paper provides a variable parameter filter technique to filt positioning noise and high frequency noise meanwhile keeping rapid speed response, this technique has lower filter stiffness and damp paremeter in static state and bigger stiffness and damp paremeter in movement state using variable parameter technique, accordingly to solve the contradictions of positioning noise and positioning speed.

为实现系统高精度定位和快速响应，本文提出了采用宏定位变参数滤波技术滤除宏定位系统高频噪声，同时保持系统高响应速度。

The invention relates to a dynamic matrix control system of high-purity distillation, which comprises distillation tower, intelligent checker, DCS system, superior host, and on-site bus, while they are connected. The control system uses tower product group as the object variable, and the reflux ratio and reboil ratio as control variable; the superior receives history temperature and pressure data from the DCS real-time database, via the predict control and dynamic matrix controller, to obtain the output values of present controller as reflux ratio and reboil ratio, then feedback said two values to DCS system, to function the distillation object. The invention can confirm the high-purity stable operation, with better dynamical control.

本发明公开了一种高纯精馏的动态矩阵控制系统和方法；系统包括：精馏塔、智能检测仪表、DCS系统、上位机和现场总线；所述精馏塔、智能检测仪表、DCS系统和上位机通过现场总线依次相连，实现信息流的上传和下达；本发明所涉及的控制系统采用塔双端产品组分为被控变量，回流比和再沸比为对应的控制变量；上位机从DCS实时数据库中获得历史的温度、压力等数据，通过推断控制环节和动态矩阵控制器环节，得到当前控制器的输出值-回流比和再沸比，再把控制器输出值返回给DCS系统，实现了对高纯精馏过程的双端产品高纯控制，对双端组分的高纯度平稳操作，具有很好的动态品质和控制效果。

The method is based on a variable structure to control the SVC, wherein, the variable structure control method comprises two aspects of the unbalanced load equalization compensation and the parameter control of a PI controller, wherein, the unbalanced load equalization compensation adopts the SVC compensation susceptance computational method which is based on the synchronous rotation reference coordinate transformation of a virtual symmetrical three-phase system; meanwhile, in the stabilization control of the system voltage, the ant colony algorithm optimization method is adopted to real time adjust and to optimize the parameter kp and ki of the PI controller.

本发明公开了一种静止无功补偿器的不平衡补偿和蚁群优化方法，基于变结构对静止无功补偿器SVC进行控制，其中变结构控制方法包括不平衡负荷平衡化补偿和PI控制器的参数控制两个方面，其中不平衡负荷平衡化补偿采用基于虚拟对称三相系统的同步旋转参考坐标变换的SVC补偿电纳计算方法；同时在系统电压稳定控制时，采用蚁群算法优化方法，对PI控制器的参数kp、ki进行实时调整、寻优。

A new type of composite CVT( Continuously Variable Transmission) systems, based on dual-mode power-split planetary gear set, is of improved efficiency, power transmutability and speed variable range.

基于正反双向分汇流行星排组的一类新型复合无级变速器系统具有效率高、率容量与速比变化范围大等特点。

It's wise to choose variable names that are related to the purpose of the variable, and that are unlikely to get mixed up typographically.

选择的变量名要能够尽量从字面上表达变量的用途，这样做不容易引起混淆。

Statistical process control method cent is statistical quality control and statistical performance monitoring two parts, what statistical quality control includes to process of single variable count is controlled and be based on statistic to return to is soft measure a technology, method of statistical performance monitoring includes advocate yuan analysis, independent the much more variable and umbriferous technology such as yuan of analysis and statistical control graph.

梗概： 回顾了统计过程控制的发展历史，介绍了统计过程控制的基本概念。将统计过程控制方法分为统计质量控制和统计性能监控两部分，统计质量控制包括单变量统计过程控制和基于统计回归的软测量技术，统计性能监控方法包括主元分析、独立元分析等多变量投影技术以及统计控制图。

Multiple linear regression is the simplest way to build the relationship between the several explanatory variables and response variable. However, MLR often causes the estimated regression coefficients unstable or even unaccessible when the number of explanatory variables is more than that of objects. Especially, the explanatory variables are highly intercorrelated which called multi-collinear data. Therefore, many methods have been developed to analyze multi-collinear data, such as variable selection methods, ridge regression, principal components regression and partial least squares regression.

当要同时建立多个解释变数与反应变数间的关系时，最简单的方式是以复回归来处理，但是当解释变数数目远多於样本数，或者变数之间具有高度相关性时，会使得回归系数的估计变得不稳定甚至无法求得，这样的资料又称为共线性资料，在面临这样的资料时可以利用变数选取的方式降低资料组的维度，或者以脊回归、主成分回归及净最小平方回归等方法来灭种共线性的干扰。

Another robust control tool—the variable structure control theory is also studied in the thesis. The conventional variable structure control theory can not overcome the unmodelled dynamic errors.

仿真表明，这种方法对于系统的非线性特性未知的情况下是有效的，并对系统参数的不确定性以及CMAC神经网络学习存在的误差具有鲁棒性。

Moreover, by using fuzzy control concept in variable-structure system, the chattering problem which exists in most variable-structure systems is subdued, and the system robustness to unmodelled uncertainties and external disturbances is improved.

另外，通过在分散变结构控制系统中引入模糊控制规则减弱了一般变结构控制系统的颤振。

The first case is the variable depth with a fixed notch-width and the second case is variable width with a fixed notch-depth. It can be observed fromthe moment-curvature curve of the first case that the magnitude of the moment is larger for the deeper depth than that for the shallow depth.

由有限元素ANSYS 分析结果可以观察出，在控制固定曲度做循环弯曲负载时，弯矩－曲度曲线图显示出，在固定凹槽的宽度，当深度较浅时，达到设定的控制曲度所需施加的弯矩相对於凹槽深度较大的圆管要大的多。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。