基于MC9S08QG8低端微控制器的无线控制器设计

为改变ZigBee无线控制器节点设计中通常需要使用高端微控制器的现状,引入Freescale低端微控制器MC9S08QG8配合MC13192无线收发器再加上少量外围元器件,实现了一种ZigBee无线控制器的精简硬件设计电路.同时描述了器件选择、总体构建思路与硬件设计细节,最后介绍了该无线控制器的一个实例应用.基于低端微控制器的设计也能够完成无线网络要求的一些基本任务,并且满足无线控制应用中的低功耗、低成本、高性能、多功能等要求.     

基于改进MC算法的三维表面重建

MC算法是面绘制中构造等值面的方法中最具代表性的方法之一，已经得到了许多完善及改进。介绍了改进MC算法的实现步骤，并介绍了用Delphi 7．0为开发平台，利用OpenGL三维图形软件包开发基于改进MC算法的三维表面重建系统的设计过程。     

基于MC9S12的智能车系统设计

基于MC9S12XS128芯片构建了太阳能智能车系统，可以实现循迹、避障、速度检测与控制、太阳能充电等功能。叙述了各个模块的硬件设计，并对智能车避障的常用方法进行了比较，通过简化模糊控制的应用方案，提高了避障的实时性。     

激光合金化引入亚微米MC型增强相的研究

为了研究不同反应方式的原位合成或直接添加所引入的碳化物增强相对碳化物强化铁基复合涂层耐磨性能的影响,采用CO2激光器在T10钢表面激光合金化制备TiC/Fe基复合涂层,对涂层的组织结构、显微硬度和耐磨性能进行了检测和分析。结果表明,合金化层组织致密无缺陷,由γ-CrFe7C0.5相+亚微米MC相(M=Ti,Cr,W)组成,其中奥氏体在磨损过程中由于加工硬化转变成马氏体;直接添加增强相的磨损失重是原位合成反应生成增强相的2倍～3倍;Ti+C化合反应生成的碳化物含量高于TiO2+C还原反应,耐磨性能更优异。该实验结果对制备TiC强化Fe基复合涂层时陶瓷相的最佳引入方式,有一定的指导借鉴作用。     

MC35i外围电路设计及应用

重点说明了MC35i的AT命令的使用以及相应的实例;设计实现了MC35i通信的外围电路。     

From restricted towards realistic models of salt solutions: Corrected Debye–Hückel theory and Monte Carlo simulations

The properties of bulk salt solutions over wide concentration ranges are explored by a combination of simple physical theory and Monte Carlo (MC) simulations. The corrected Debye–Hückel (CDH) theory which incorporates ion size effects in a linear response approximation is extended to yield free energy and other thermodynamic properties by integration of the chemical potential over concentration. Charging integration which is usually used to obtain an electrostatic contribution of total free energy of electrolytes is avoided in this new direct approach. MC simulations are performed with a modified Widom particle insertion method, which also provides directly the ionic activity coefficients. The validity of the CDH theory is tested by comparison with the MC simulation data for 1:1, 2:1, 2:2 and 3:1 restricted primitive model (RPM) electrolytes over a wide concentration range and at various ion sizes. Mean ionic activity and osmotic coefficients calculated by the CDH theory in RPM approximation of electrolyte are fitted to experimental data by adjusting only a mean ionic diameter. Good fits up to 1 molal (m) concentration are obtained for a large number of salt solutions. MC simulations data for unrestricted primitive model (UPM) of 1:1 and 2:1 electrolytes are also fitted to the experimental data by varying the cation radius while keeping the anion radius fixed at a crystallographic value. The success of this approach is found to be salt specific. For example good fits up to 2 and 3.5 m concentrations were obtained for LiCl and LiBr, respectively. However in the case of less dissociated salts such as NaCl and KI the experimental data could only be fitted up to one molal concentration. Possibility of extending the applicability range of the CDH theory to concentrations >2 m is explored by including a concentration dependent dielectric constant as measured in experiments. Mean ionic activity coefficients for a number of salts could successfully be fitted up to 3 m concentration by adjusting only a mean ionic diameter. Difficulties encountered in simultaneously fitting the mean ionic activity and osmotic coefficients at salt concentrations >2 m are discussed.     

Development of a gas chromatographic/mass spectrometric method to quantify R(-)-apomorphine, R(-)-apocodeine and R(-)-norapomorphine in human plasma and urine

A method was developed and validated for the analysis of R(-)-apomorphine, (R-)-apocodeine and R(-)-norapomorphine in human plasma and urine with N-propylnorapomorphine as internal standard using gas chromatography/mass spectrometry (GC/MS) and single-ion monitoring after a single liquid-liquid extraction and silylation of compounds. The quantification limits were 1 ng/ml for apomorphine and apocodeine and 25 ng/ml for norapomorphine. Calibration curves were linear, within the range 1-100 ng/ml. Variation in intraday and interday precision was below 10%. This method was applied to study apomorphine bioavailability in nine patients with Parkinson's disease before and after coadministration of a catechol-O-methyl transferase inhibitor.     

基于MC33879的电磁海流计励磁电路设计

MC33879是Freescale公司生产的8通道单8路串联开关。设计了基于MC33879的电磁海流计的励磁信号产生电路，并给出了具体的硬件电路设计和系统软件流程图。电路设计具有结构简单，易于控制的优点。     

On the convergence of He's variational iteration method

In this work we will consider He's variational iteration method for solving second-order initial value problems. We will discuss the use of this approach for solving several important partial differential equations. This method is based on the use of Lagrange multipliers for identification of optimal value of a parameter in a functional. This procedure is a powerful tool for solving the large amount of problems. Using the variational iteration method, it is possible to find the exact solution or an approximate solution of the problem. This technique provides a sequence of functions which converges to the exact solution of the problem. Our emphasis will be on the convergence of the variational iteration method. In the current paper this scheme will be investigated in details and efficiency of the approach will be shown by applying the procedure on several interesting and important models.     

基于HCS12单片机SPI的实时显示设计

本文介绍了多功能显示驱动器MC14489与HCS12系列单片机的接口应用开发设计,给出了两种不同接口电路,叙述软件编程的步骤,并给出了相关的程序源代码,经实验表明SPI通讯具有更大的优势.