一种新型筒形矿仓物位测量方案的设计

针对常用的矿仓物位测量方式受粉尘和堆矿死角因素的影响而存在矿仓物位测量不准确的问题,提出了一种新型的矿仓物位测量方案。该方案选择重锤物位计消除粉尘干扰、采用多点布局求取均值的方法消除堆矿死角干扰。实际应用表明,该方案解决了粉尘和堆矿死角对物位测量的影响,降低了矿仓岗位人员的劳动强度。     

A new control method for MIMO first order time delay non-square systems

This paper proposes a new method using internal model control (IMC) to design Smith delay compensation decoupling controller for multivariable non-square systems with transfer function elements consisting of first order + time delay. This proposed method is applied to a shell control problem in multiple-input-multiple-output (MIMO) first order plus dead time non-square systems in which the number of input variables exceeds the number of output variables, with input and output variables being 3 and 2 respectively. This method does not only dynamically compensate for shortcoming caused by static decoupling but also overcomes the impact of model error on system performance caused by model approximation and uncertainty. In other words, the design method proposed in this paper is capable of significantly improving dynamic quality and robustness of the control system as can be seen from the simulation results. Moreover, this new method is simple and easy to implement. Integral of squared error (ISE) performance criterion is employed to quantitatively evaluate the design method.     

一种频率依赖性迟滞的神经网络内模控制

针对压电陶瓷等智能材料存在的依赖输入频率的迟滞非线性问题,采用BP神经网络对迟滞非线性进行辨识,并通过内模控制方案来对其进行控制.在迟滞的建模上,构建了一种静态迟滞非线性环节串联一个对输入频率敏感的线性动态环节组成的Hammerstein模型.在此基础上,得出Hammerstein模型的逆模型,并通过构造的正、逆模型进行内模控制.实验结果说明,提出的建模方法与内模控制方案是有效的.     

Multivariable disturbance observer-based H2 analytical decoupling control design for multivariable systems

In this paper, an H₂ analytical decoupling control scheme with multivariable disturbance observer for both stable and unstable multi-input/multi-output (MIMO) systems with multiple time delays is proposed. Compared with conventional control strategies, the main merit is that the proposed control scheme can improve the system performances effectively when the MIMO processes with severe model mismatches and strong external disturbances. Besides, the design method has three additional advantages. First, the derived controller and observer are given in analytical forms, the design procedure is simple. Second, the orders of the designed controller and observer are low, they can be implemented easily in practice. Finally, the performance and robustness can be adjusted easily by tuning the parameters in the designed controller and observer. It is useful for practical application. Simulations are provided to illustrate the effectiveness of the proposed control scheme.     

A new generator of causal ideal internal dynamics for a class of unstable linear differential equations

The generator design for causal ideal internal dynamics (IID), namely, solving IID, is a fundamental problem in a nonminimum‐phase output tracking process. In this paper, for a class of unstable matrix differential equations, a new causal IID generator is proposed, whose parameters are partly chosen via optimization. Compared with existing similar design schemes, it is applicable to matrix differential equations with singular system matrices. Also, it requires less computation, avoids taking higher order derivatives, and can be easily extended to treat slowly time‐varying matrix differential equations without the need for extra computation. Copyright © 2016 John Wiley & Sons, Ltd.     

会计电算化与内部控制

会计电算化工作是企业管理工作现代化的重要组成部分,它与传统的手工会计系统相比,有许多优点,但也给企业内部控制带来了新的挑战。本文讨论了电算化会计系统存在的问题,提出了电算化会计系统环境下企业内部控制的建议。     

网络CAI环境平台的研究与实践

在NOVELL网络环境上,设计实现了一个基于多媒体的网络CA I环境平台。介绍了该平台的总体设计、系统开发的通信、屏幕处理及内存驻留等技术;详 细讨论了远程控制、屏幕收发、信息收发等主要功能模块的实现过程。     

一种非线性和时滞系统自适应控制方法

提出一种新的基于高斯基函数(GPFN-G aussian potential function networks)网络的内模控制算法,并对高斯基函数网络内部模 型和内模控制器的建立进行了深入分析．仿真及实时控制结果表明该算法是有效的,具有很 好的自适应性和鲁棒性,可以应用于具有时滞和非线性时变系统中．     

Determining the number of internal stability of a graph

The number of internal stability or independence number of an undirected graph has many important applications. Computationally it belongs to the class of intractable problems known as NP-Hard. In this paper we develop a tree search algorithm to determine the ndependence number of an undirected graph. Extensive computational experience on 2400 randomly generated graphs ranging from 20% to 90% densities and from 50 to 200 vertice has shown that the proposed algorithm is very effective.     

智能蓄电池系统在电力调度自动化主站中的应用

本文介绍了常用的蓄电池监测方法和智能蓄电池组监测系统的应用。该系统可应用于各种蓄电池组的性能监测,综合判定蓄电池组的性能,有效地活化蓄电池的使用寿命,并能对失效的电池给以报警提示。