J2ME时钟动画屏保的设计与实现

给出了采用JDK和J2ME Wireless Toolkit编程设计手机动画屏幕保护程序的方法、步骤,包括PNG动画的制作、Timer类和TimerTask类设计定时器,以及对MIDlet套件进行打包和安装。     

基于J2ME平台的手机游戏分析与设计

介绍了J2ME主要技术,设计了一个手机游戏,并对系统中的一些关键技术进行了讨论,对手机游戏的发展方向进行了展望。     

基于J2EE的格子铺管理平台设计与实现

分析了格子铺基础管理的不足;基于J2EE核心技术,以MVC框架为技术支持,运用JFreeChart、JSON等技术,构建和开发了高效、便捷的格子铺管理平台。     

浅析Java的发展现状与趋势

采用文献研究法和比较研究法,对Java的发展现状与趋势进行了比较分析。研究认为,虽然自SUN被Oracle收购后,引发了人们对Java未来的担心,但Java在与其他主流编程语言的竞争中,仍然会保持强劲的发展势头。     

基于单片机的小气候信息采集系统便携机设计

农业生产技术的快速发展,迫切需要一种适用于普及的、可靠、有效的针对农田小气候信息参数的实时采集系统,提高人们对作物生长与小气候之间关系的认识,为农业生产服务。本文介绍了基于PIC单片机的小气候信息采集系统便携机部分设计,文中详细描述了小气候信息采集方法和系统软硬件结构。便携机系统实现了包括温湿度、光照度、降雨量、蒸发量、大气压等15种小气候参数的自动、实时监测。通过实践证明该便携机设计合理、性能可靠,作为小气候信息采集系统的主体部分,是适合目前农田小气候信息自动监测的普及型设备。     

基于J2EE的秸秆火点监测系统设计

秸秆焚烧火点监测在我国受到越来越多的重视,而遥感作为秸秆焚烧火点监测的有力手段也得到越来越多的应用。本文利用J2EE技术,实现了秸秆火点监测系统设计,并详细介绍了系统的设计思想,以及开发过程中的核心算法和主要技术问题。     

A Hidden‐picture Puzzles Generator

A hidden‐picture puzzle contains objects hidden in a background image, in such a way that each object fits closely into a local region of the background. Our system converts image of the background and objects into line drawing, and then finds places in which to hide transformed versions of the objects using rotation‐invariant shape context matching. During the hiding process, each object is subjected to a slight deformation to enhance its similarity to the background. The results were assessed by a panel of puzzle‐solvers.     

An LMI approach to synthesis subject to almost asymptotic regulation constraints

A multi-objective controller synthesis problem is considered in which an output is to be regulated approximately by assuring a bound on the steady-state peak amplification in response to an infinite-energy disturbance, while also guaranteeing a desired level of performance measured in terms of the worst-case energy gain from a finite-energy input to a performance output. Relying on a characterization of the controllers with which almost asymptotic regulation is accomplished, the problem of guaranteeing the desired level of performance is reduced to solving a system of linear matrix inequalities subject to a set of linear equality constraints. Based on the solution of this system, a procedure is outlined for the construction of a suitable controller whose order is equal to the order of the plant plus the order of the exogenous system.     

control with limited communication and message losses

We propose an H^∞ approach to a remote control problem where the communication is constrained due to the use of a shared channel. The controller employs a periodic time sequencing scheme for message transmissions from multiple sensors and to multiple actuators of the system. It further takes into account the information on the random message losses that occur in the channel. An exact characterization for controller synthesis is obtained and is stated in terms of linear matrix inequalities. Furthermore, an analysis on the loss probabilities of the messages to accomplish stabilization is carried out. The results are illustrated through a numerical example.     

Estimation of parameters of the Makeham distribution using the least squares method

The Makeham distribution has been used to describe human mortality and establish actuarial tables. The hazard function is defined by μ(t)=A+BC^t$\mu (t)=A+B{C}^t$, we use the least squares type estimation to estimate the parameters of Makeham distribution in this paper. Seven cases are considered, when A, B, C are known or unknown, respectively. Also, we evaluated the mean square errors of these estimators.