中文点阵液晶显示驱动器RA8816及其应用

内置中文字库的点阵液晶显示驱动器RA8816具有极强的通用性。RA8816将多种实用的外围电路集成在芯片内部,使得应用系统的硬件电路和软件设计大大简化。利用RA8816构成的人机交互系统,不仅更容易控制,而且还能降低系统成本,是构成微机控制系统人机交互的理想方案。文中给出了RA8816详细的硬件配置方法以及关键的控制程序。最后结合一个具体的屏幕滚动实例,给出了RA8816控制方法。实验结果表明,RA8816构成的人机交互系统可以使硬件电路更加紧凑、可靠,软件设计更加方便。     

A comparison of the time involved in computing fast Hartley and fast Fourier transforms

It is shown that the DFT of a real sequence, formed via the Fast Hartley Transform, can be computed at most only 2 times faster than by using a complex Fast Fourier Transform. However, more sophisticated FFT algorithms exist which give the same speedup factor. A simple FHT subroutine is presented to illustrate the similarity of the FHT and FFT butterflies in their simplest forms.     

The Availability of a k-out-of-n:G Network

A method is described for calculating the analytic availability of a k-out-of-n:G network where the availability of each component may be different. An algorithm and a FORTRAN subroutine are provided to calculate this type of availability.     

LCD驱动器RA8816接口及编程方法

LCD驱动器RA8816支持多种控制接口,并且将中文字库、点阵LCD驱动、键盘扫描电路和通用IO口等多种实用的外围电路集成在单颗芯片内部。利用RA8816构成的人机交互系统,软、硬件设计得到极大的简化,不仅更容易控制,而且还能降低系统成本,是构成微机控制系统人机交互的理想方案。文中全面介绍了RA8816的硬件配置方法及关键的控制程序。     

基于Labview的超声电机测控系统的研究

利用虚拟仪器技术和PCI6115高速数据采集卡开发出一种频率、相位差、幅值可调的高性能超声电机测控系统。与传统测控方法相比，该系统具有硬件简单、功能较为完善、测试准确度高等特点。利用Labview内嵌的matlab子程序使系统具有灵活而又强大的信号处理能力，且能为以后的控制理论和算法的应用提供一个很好的平台。     

PCs for AP and other EM reflections

A FORTRAN subroutine is presented, which accurately determines the effective width of a waveguide and its length, by measuring the resonance frequencies of the cavity made of the same waveguide. This measurement method only necessitates a scalar network analyzer and standard waveguide components     

基于FPGA的16位堆栈处理器的设计

设计了一款面向嵌入式控制领域的16位堆栈处理器,该处理器包含两个堆栈:执行数学表达式的数据堆栈和支持子程序调用的返回堆栈,其指令集含35条堆栈指令.详细给出了该堆栈处理器的体系结构及设计方法;不仅采用简单有效的指令编码方式缩小了代码体积,同时给出了单周期操作多个堆栈元素的解决方法.该处理器采用FPGA实现,在XC5VLX110T芯片上的运行时钟频率最高达到146.7MHz.最后给出了设计的软件仿真与硬件综合结果.     

MICPA: evaluation of microstrip-line parameters

A subroutine for microstrip-line parameters is described which evaluates dispersive effects, microstrip dimensions, conductor attenuation and dielectric loss.     

A three-dimensional DFT algorithm using the fast Hartley transform

A three-dimensional (3-D) Discrete Fourier Transform (DFT) algorithm for real data using the one-dimensional Fast Hartley Transform (FHT) is introduced. It requires the same number of one-dimensional transforms as a direct FFT approach but is simpler and retains the speed advantage that is characteristic of the Hartley approach. The method utilizes a decomposition of the cas function kernel of the Hartley transform to obtain a temporary transform, which is then corrected by some additions to yield the 3-D DFT. A Fortran subroutine is available on request.     

Computer simulation of nonlinear inductors with hysteresis

An algorithm is described for the simulation of nonlinear inductors with hysteresis. It is intended as a subroutine for a nonlinear transient-analysis computer program. A computed example is presented.     

风扇双工作模式定时控制器设计

采用了AT89C2051单片机为核心,辅以上电复位电路、时钟电路、功能设置电路、显示电路、风扇加电断电控制电路构成了电风扇多模式定时控制器。同时设计了与硬件相配套的软件,包括主程序和定时中断子程序,通过仿真测试、分析,能随时进行新的时间参数设置;且在整个定时时间内,电路具有允许用户随时自行选择＂阵风＂或＂连续风＂两种工作模式的控制功能。设计电路简单、制作容易、设置方便、使用灵活。     

用PC汇编语言编程解决汉诺塔问题

汉诺塔问题是典型的只有用递归方法才能解决的问题。而用汇编语言编写的递归程序很容易出错 ,本文介绍了汉诺塔问题的解决思路 ,并给出了用汇编语言编写的源程序。     

使用BASIC编译程序开发光学设计程序

BASIC编译程序支持大多数解释的BASIC语言。本文叙述了编译调试BASIC解释光学设计程序的过程,强调了处理方法;通过光学设计子程序及程序段描述了解释程序和编译程序在BASIC语言上的不同之处。     

单片机定时器捕获模式解码红外遥控器的方法

以单片机作为核心控制器的电子产品日益广泛使用,它们的操作方式主要还是由外接的键盘来完成。若在此类产品中增加红外遥控功能,将使它们的操作更加人性化。用单片机进行软件解码最普遍的方法有查询法和外部中断法,在此详细介绍一种用AT89S52单片机定时器T2捕获功能实现接收解码的新方法,给出了解码的程序流程图和相应的子程序。实践证明,该解码方法占用单片机资源少,程序代码运行稳定可靠,效率高。该解码方法可为单片机产品开发者提供一个非常实用的参考,也可为学习者提供一个典型的应用范例。     

C51嵌套汇编子程序在阻抗测试仪研制中的应用

C51嵌套汇编子程序，充分发挥了两种语言自的优势，介绍了C51调用汇编子程序的接品规则，并通过阻抗测试仪程序开发的例子予以详细说明。     

调用C子程序的汇编源程序简化格式

本文绘出了一种通过上机调试总结出来的能调用C子程序的8086汇编源程序的简化格式。它既保证了汇编与C的正确接口，又基本上符合汇编程序员的编程习惯．     

A globally convergent and consistent method for estimating the shape parameter of a generalized Gaussian distribution

We propose a novel methodology for estimating the shape parameter of a generalized Gaussian distribution (GGD). This new method is based on a simple estimating equation derived from a convex shape equation. The estimating equation is completely independent of gamma and polygamma functions. Thus, no lookup table, interpolation, or additional subroutine to evaluate these functions are required for real-time implementations of the proposed method, which is in contrast to all existing methods. Furthermore, we establish that the shape equation has a unique global root on the positive real line and the Newton-Raphson root-finding algorithm converges to the unique global root from any starting point in a semi-infinite interval Theta_min. More importantly, we show that the sample-based shape estimating equation has a unique global root with probability tending to one and the root is consistent for the true shape parameter. Finally, we prove via fixed point arguments that, with probability tending to one, the Newton-Raphson algorithm converges to the unique global root of the sample shape estimating equation from any starting point in Theta_min. Some numerical experiments are also provided to demonstrate the global convergence and the excellent finite sample performance of the proposed method     

广州数控车床子程序的应用

广州数控车床M98指令用于子程序调用，与从子程序返回指令M99（以M99结束）成对出现。通过实例对如何运用M98、M99指令编制子程序进行说明。     

Automated Design of DC-Coupled Broad-Band Amplifiers Monolithic

A design automation program has been written to optimize the design of dc-coupled monolithic broad-band amplifiers. This program adjusts dc conditions, device geometry, and all passive elements to obtain the maximum small-signal bandwidth consistent with specified low-frequency gain and quiescent power dissipation. The principal features of the program are a frequency-response analysis subroutine based on a nodal admittance matrix formulation, a precise response sensitivity analysis using the adjoint network, and an optimization subroutine based on the Fletcher-Powell algorithm. Two complete design examples, based on the series-series feedback triple and series-shunt feedback pair, are presented. For typical integrated-circuit processing, a maximum bandwidth on the order of 100 MHz is obtained for these designs with a voltage gain of 34 dB and 96-mW power dissipation.     

基于LOWTRAN7的红外大气透过率计算方法

介绍了红外辐射在大气中传输时产生衰减的主要原因,对几种常用的红外大气传输计算方法及软件进行了简要说明,详细阐述了LDWTRAN 7软件的使用方法,输入输出文件格式.论述了对LOWTRAN 7进行嵌入式应用的重要性并提出了一种LOWTRAN 7的嵌入式应用方法,给出了相关的电路原理简图以及使用Delphi 6编写的子程序源代码.