Stability of Local On‐Ramp Metering Control Laws

A framework for stability analysis of local on‐ramp metering control strategies based on the cell transmission model is presented. Within this framework, it is possible to formulate Lyapunov and input‐state stability results for on‐ramp metering control strategies in an open section of highway with on‐ramps. Using this analysis, recommendations for the design of on‐ramp metering control laws set points are derived. Two examples on the use of such analysis are presented. One deals with the stability analysis of a local on‐ramp metering control law and the other with the design of a disturbance observer that, used in combination with the local on‐ramp metering control law, provides a more robust response to traffic regulation. Simulation results are included that confirm the possibility of using this framework to test the impact of local on‐ramp metering control strategies.     

Distributed adaptive control for vehicular platoon with unknown dead‐zone inputs and velocity/acceleration disturbances

This paper is focused on designing a distributed adaptive control scheme for a vehicular platoon with unknown bounded velocity/acceleration disturbances and unknown nonlinear dead‐zone inputs. Our aim is to design distributed adaptive controllers based on integral sliding mode control techniques that guarantee practical exponential convergence (i.e., exponential stability of an arbitrarily small neighborhood of zero) of the spacing errors and the string stability of the whole vehicular platoon. The contributions of this paper are that: (i) based on a modified constant time headway policy, the whole vehicular platoon is guaranteed to have string stability despite dead zone inputs; (ii) adaptive compensation terms are constructed to compensate for the time‐variant effects caused by unknown bounded velocity/acceleration disturbances, and unknown dead zone inputs; (iii) an efficient numerical method for avoiding the singularity problem of the control law is also proposed. Numerical simulation results show the validity and advantages of the proposed method are significantly higher traffic density and string stability. Copyright © 2016 John Wiley & Sons, Ltd.     

维吾尔文智能输入法研究

开发智能化的输入法是维吾尔文输入技术的一个发展方向,也是维吾尔文自然语言信息处理的基础性研究课题。该文根据维吾尔文自身特点,对用户输入过程中所犯各种错误进行分析,设计并实现了词语搭配知识库,提出了基于二元语法模型的一种新型维吾尔文输入算法,并给出了实现其关键模块功能的程序流程图。它具有自动预测、自动联想输入和自动校对等功能。     

水书键盘输入系统研究与实现

水族文字被称为水书。为了满足水书研究者和出版业界的需要,设计了水字字符集的Unicode编码,利用字体制作软件建立了水字TrueType字库。该文提出了一种基于笔形特征的编码方法,依据编码规则取水字3个角的笔形组成有序序列,为水字编码。利用Windows系统的IMM-IME机制,实现了水字笔形输入法。     

Observability of switching structured linear systems with unknown input. A graph-theoretic approach

This paper deals with the observability of the discrete mode, the internal state and the input of switching structured linear systems with unknown input. The proposed method, based on a graph-theoretic approach, assumes only the knowledge of the system’s structure. We express, in graphical terms, necessary and sufficient conditions for the generic observability of the discrete mode, the continuous internal state and the input of a switching structured linear system. These conditions can be implemented by classical graph theory algorithms based on finding particular paths and cycles in a digraph.     

活用RC特性实现对CMOS数字IC的输入保护

介绍了灵活利用RC的特性对CMOS数字IC的输入保护措施,并重点讨论了其应用电路及其参数的设计计算过程。此方法抑制噪声的效果非常好,可以广泛应用于理论及实践性教学、工程设计等方面。     

一类提取模糊规则的新方法及其在干燥建模中的应用

基于系统的输入－输出数据,提出一种通过划分输入空间撮模糊规则的方法,并将该方法应用于建模非线性程度较高物干燥过程。建模过程中,首先利用训练样本将输入空间动态地划分为若干个子空间,然后针对第一个子空间了生一条模糊规则,再将所产生的模糊规则共成一个模糊规则库,模糊逻辑系统的最终输出从模糊规则库中产生。仿真结果表明,该方法可很好地预测干燥系统的物料降水率,而且简单实用,十分可靠。     

多输入非线性串级系统的非过参数化自适应控制

证明了一大类含有未知参数的多输入非线性串级系统在适当的假设条件下是可全局适应稳定的,自适应控制律的设计是基于ｂａｃｋｓｔｅｐｐｉｎｇ递推设计方法,得到的参数自适应律的阶次等于未知参数的个数,因此该设计是非过参数化的。     

电信代收代付处理方案

以抚州工行代收电局电话费为例,介绍了代收代扣电话费的中间业务处理,包括了网点代数、批量代扣两种方式。     

在程序中选择和配置输入法

介绍了在VC＋＋开发的Windows应用程序中选择和配置输入法的技术,为基于Windows95／98平台的无纸化考试系统操纵和控制输入法提供了一种行之有效的解决办法。