基于ARM的医用数据采集系统的人机接口设计

介绍了基于TI公司的LM3S3748医用数据采集系统的人机接口设计方案。此设计主要包括触摸屏液晶接口电路及其软件设计和手柄控制器与核心板的接口电路及其软件设计两部分。实验表明，该人机接口的设计是成功的，并具有很强的可移植性。     

Graft and characterization of 9-vinylcarbazole conjugated molecule on hydrogen-terminated silicon surface

Using wet chemical reaction between N-vinylcarbazole and hydrogen-terminated silicon surface, we present a new and simple route to directly bond π-conjugated organic molecule on silicon surface. The Si can be in the form of single crystal Si including heavily doped p-type Si, intrinsic Si, heavily doped n-type Si, on Si(1 1 1) and Si(1 0 0), and on n-type polycrystalline Si. The covalent bond between 9-vinylcarbazole and silicon surface was confirmed by reflectance FTIR, XPS and contact angle measurement, respectively. A data-encompassing explanation for the mechanism discusses the possible route of the reaction. This simple and low-costly reaction offers an attractive route to attach functional conjugated molecules onto the semiconductor surface which aims to create some unique molecular device in the future.     

集成充电控制器LM3647及其应用

LM3647是National Semiconductor公司最新推出的可以对镍镉及锂离子电池进行充电控制的集成芯片。本文介绍了该芯片结构、特点、工作原理及设计方法，并给出了典型的应用电路。     

基于并行分离增广拉格朗日乘子法的字符矫正

字符矫正是光学字符识别(OCR)系统预处理过程中 的重要步骤,针对传统的增广拉格朗日乘子法(ALM)求解字符矫正问题时收敛性和计算速度 的不足,本文研究了并行分离的增广拉格朗日乘子法,综合考虑字符矫正模型的建立过程, 提出并行分离方法与ALM相结合的思想解决字符 矫正问题。用并行方式将迭代问题分解成3个子问题,计算时能够同时求解分解后的这3个 子问题,然后进行凸组合,最 后收敛到问题的最优解。实验结果表明,本文算法能够快速准确地对变形的字符图像进 行矫正,并且具有良好的实时性和适 应性,可用于OCR系统的矫正预处理中,提高OCR系统的识别率。     

基于LM3S811芯片的“应声而来”智能家居垃圾桶

以LM3S811为核心设计一种智能家居垃圾桶,实现语音控制垃圾桶的运动。以拾音器作为声音传感器,采用延时估计法实现声源方位的实时检测;采用超声波传感器实现了垃圾桶行进的避障功能;同时,采用语音识别技术实现对用户的开启和关闭垃圾桶盖等各种语音指示的识别。关闭垃圾桶盖后,自动回到原来位置。从而达到了垃圾桶"应声而来"的智能化。     

简易智能语音模块的设计与实现

介绍一种简易智能语音模块的设计方案,采用单片机AT89C2051语音的控制中心,语音芯片采用一次性可编程语音芯片API8108,进行了软硬件的设计与调试,实现了语音存储和回放功能。     

Microscopic, mass spectrometric and spectroscopic characterisation of the mordants used for gilding on wall paintings from three post-Byzantine monasteries in Thessalia, Greece

The main churches of three monasteries in Thessalia, Central Greece are decorated with wall paintings from the post-Byzantine period. The main goal of the present study is to offer insights into the decorative technique of mordant gilding, especially the chemical composition of the mordants and the effects on them of ageing. Light microscopic (LM) examination was carried out on samples taken from the gilded areas of the paintings to view their layer build-up. Direct temperature resolved mass spectrometry (DTMS) under electron ionisation (EI) and chemical ionisation (CI) conditions led to the identification mainly of the organic, as well as some inorganic compounds. Scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX) gave an account of the elemental composition on selected cases. The results from samples taken from different wall paintings were compared with each other to observe their differences and similarities. Furthermore, the three churches in question are believed to have been painted by the same painter, who has only been identified in one of them. Hence, the comparison of the wall paintings as far as the mordant gilding technique is concerned provided additional evidence on the identity of the painter in the other two churches.     

数控式步进可调稳压源

稳压电源是各种实验室必备的仪器，使用频繁。LM317是使用极为广泛且性能优良的三端串联型可调集成稳压器。利用LM317和数字集成芯片的巧妙结合，可构成数控式步进可调直流稳压源，且同步显示输出的挡位数，显示稳定直观，稳压输出取值按照设计需要而设定。本文介绍的数控式步进调压源实现了对输出电压的分挡输出，精度较高，使用方便，具有较高的性价比。     

带可编程数字音量控制和输出模式选择的集成音频放大器LM4851

LM4851是美国NS公司生产的BoomerTM音频功率放大器系列中的新型器件。该芯片带有SPI可编程32级数字音量控制和输出模式选择 ,其单声道和立体声输出功率分别为1.1W和2×115mW。文中介绍了该芯片的功能与原理 ,并给出了其典型应用电路     

推广的Grunwald插值在LM,ωBa空间中的逼近

本文研究了推广的Grunwald插值算子在L_M,ω^Ba空间中的逼近.利用Orlicz空间范数和L_M,ω^Ba空间范数关系的不等式,以第一类Chebyshev多项式的零点为结点时,获得了两类推广的Grunwald插值算子在加权的L_M,ω^Ba空间中的逼近阶.