触摸屏技术及其μCLinux下的驱动设计

针对触摸屏和μCLinux广泛应用于嵌入式设备的现状,介绍了触摸屏技术及其在μCLinux下的驱动设计;在硬件方面介绍了触摸屏的工作原理、硬件连接;在软件方面详细介绍了μCLinux下驱动设计的特点、触摸屏的状态转换、触摸屏驱动的设计方法,经实验证明,本驱动完全满足应用要求.     

基于Linux的触摸屏

介绍了基于S3C2410芯片的触摸屏的设计,阐述了触摸屏的工作原理、硬件结构和驱动程序流程.介绍了触摸屏接口芯片ADS7846的功能和使用方法,并结合大量源代码进行分析,提出了基于Linux操作系统的触摸屏设备的开发方案.该触摸屏具有精度高的优点.     

基于LM3S1138的触摸屏系统设计

触摸屏是目前最易于使用的人机交互系统。介绍了触摸屏的分类,并以四线电阻触摸屏为例,介绍了它的工作原理;然后给合ILI9320液晶显示屏,给出了其基于LM3S1138处理器的硬件电路;并且简单介绍了触摸屏的校正原理,以及如何开发基于GRLIB库的图形化应用程序,最后给出了相应的软件流程图。     

嵌入式Windows CE下触摸屏驱动程序开发的关键技术

在介绍触摸屏工作原理的基础上,阐述 Window CE驱动程序结构,又详细阐述基于Windows CE的触摸屏驱动程序的开发流程及其关键技术.本文介绍了触摸屏驱动程序开发的软硬件细节,介绍的方法可移植性强,可以被方便的移植到其它的硬件设备中.     

触摸屏和PLC在丝光碱液控制系统中的应用

介绍了丝光机的碱液浓度和温度的电气控制方法,以及PLC和触摸屏在控制系统中的应用,并介绍了PLC编程和触摸屏的组态。     

电阻式触摸屏校准算法的优化

本文介绍了电阻式触摸屏的工作原理,分析了触摸屏的基本线性校准算法,在此基础上进一步提出了触摸屏校准的优化算法,并对两种校准算法进行了测试比较,实验结果表明,与基本线性校准法相比,优化算法大大提高了触摸屏校准精度。     

触摸屏和PLC在轧辊磨床中的应用

介绍了PLC和触摸屏在轧辊磨床控制系统中的应用。主要阐述了系统组成和工作原理、硬件设计,然后对组态的触摸屏主要界面进行了介绍。     

富士触摸屏在流化焚烧炉监控系统中的应用技术

触摸屏的应用随着信息社会的发展越来越普遍,目前触摸屏产品在中国已开始形成了产业,本文介绍有关触摸屏的相关技术及其在流化焚烧炉监控系统中的应用.     

触摸屏与PLC组成的伺服电机控制系统

介绍了触摸屏和PLC的特点，并从系统的构成和功能方面介绍了触摸屏与PLC组成的伺服电机控制系统，着重讲述了触摸屏画面的设计，以及如何利用PLC控制电机的转动和PLC的高速计数器进行高速计数。触摸屏作为人机界面，系统界面友好，简单直观，易于操作。     

电阻式触摸屏的坐标定位与笔画处理技术

介绍了电阻式触摸屏坐标定位方法及工作原理,分析了影响电阻式触摸屏坐标定位精度的原因,探讨了提高坐标定位精度的方法,提出了从触摸屏坐标对应到显示坐标的坐标变换公式对于在电阻式触摸屏上书写1个笔画时,笔可能跳离触摸屏而影响手写体辨识的问题,提出了解决方法。     

基于纳米压痕技术和AFM的单晶铝硬度测试实验研究

利用纳米压痕技术对单晶铝作压痕试验,获得载荷-压深的加载和卸载曲线。根据O liver-Pharr方法求出压头与测试材料之间接触表面的投影面积Ac和硬度值Hop。再利用原子显微镜(atom ic force m icroscopy,AFM)得到压痕的真实三维形貌图。结合M atlab对压痕进行分析,得到压痕的真实残余面积Aresidual,并计算出其硬度Hresidual。通过对两组单晶铝的硬度数据进行比较分析:在微纳米尺度下,两种方法计算得到的压痕硬度都存在压痕尺寸效应,Hresidual的压痕尺寸效应比Hop要更明显。     

多元掺杂LaGaO_3基稀土复合氧化物的制备与导电性能

采用改进的固相反应法合成了锶、镁与铁或钴多元掺杂的LaGaO3基稀土复合氧化物La0.8Sr0.2Ga0.72Mg0.20Fe0.08O2.8(LSGMF)和La0.8Sr0.2Ga0.72Mgo.20Co0.08O2.8(LSGMC),利用EDS、XRD及SEM等方法对LSGMF和LSGMC的化学成分、物相组成及显微组织等进行了分析;采用直流四端子法测量了两者在350～850℃温度区间的电导率.结果表明:经1 400℃烧结后,LSGMF和LSGMC均形成单一正交钙钛矿结构;两者除含少量钙外,不舍其他杂质元素;在测试温度范围,材料的电导率与温度的关系分区间符合Arrhenius方程,在较低温阶段(350～500℃)具有较低的导电活化能(Ea<0.3 eV);与仅用锶、镁双掺杂的LSGM相比,LSGMF和LSGMC具有较高的电导率.     

Tribological testing of peroxide-cured EPDM rubbers with different carbon black contents under dry sliding conditions against steel

The friction and sliding wear behaviors of peroxide-cured ethylene/propylene/diene rubbers (EPDM) were studied against steel counterparts under dry conditions. The carbon black (CB; N347 type) content of the EPDM rubbers was varied between 0 and 60 parts per hundred parts rubber (phr). For their tribotesting, different test configurations, viz. pin(steel)-on-plate(rubber) (POP) and roller(steel)-on-plate(rubber) (ROP), were used and their oscillation wear behavior (fretting) studied, too. The EPDM rubbers were characterized using dynamic-mechanical thermal analysis (DMTA), hardness, tensile and tear tests. The coefficient of friction (COF), volume loss and specific wear rate of the EPDM rubbers were determined. It was found that with increasing CB content all above characteristics were reduced. However, the COF and wear parameters strongly depended on the related test configuration. The wear mechanisms were concluded by inspecting the worn surfaces in scanning electron microscope (SEM) and discussed.     

Characterization of micellar film morphologies of semifluorinated block copolymers by AFM

The micellar morphologies of well-defined amphiphilic block copolymers composed of 1H,1H-dihydroperfluorooctyl methacrylate (FOMA) and ethylene oxide (EO) blocks with different chain lengths were effectively investigated by using tapping mode-atomic force microscopy (TM-AFM). By spin-casting chloroform solutions, well-ordered spherical micellar films could be obtained for poly(FOMA(10k)-b-EO(10k)) and poly(FOMA(20k)-b-EO(20k)) copolymers. The atomic force microscopy (AFM) height and phase image analysis indicated that dark regions of the micelles corresponded to PEO blocks and the light regions were for PFOMA blocks. The spherical micelles with PEO corona and PFOMA core were also identified by transmission electron microscopy (TEM) and X-ray photoelectron spectrometer (XPS) analysis. The core diameters of the block-copolymer aggregates were 20nm for poly(FOMA(10k)-b-EO(10k)) and 30nm for poly(FOMA(20k)-b-EO(20k)) by TM-AFM, whereas slightly lower values of 17 and 26nm were obtained from TEM. A detailed study on the inverted morphological change observed in the micelles films after annealing above glass transition temperature (T(g)) was also presented.     

第二代太空胡芦巴种子的FTIR研究

采用傅立叶变换红外光谱法(FTIR)对第二代太空胡芦巴与地面组进行对比分析。结果表明,经航空诱变后的胡芦巴种子红外光谱的主要吸收峰的峰位、峰形与地面组的胡芦巴种子基本相同,表明其主要成分和基本结构并未发生变化。但1745cm~(-1)处羰基(C=O)的伸缩振动和1074cm~(-1)处的C-O伸缩振动明显强于地面组,说明太空胡芦巴种子中油脂类及皂苷有效成分含量明显增加;2927cm~(-1)和2855 cm~(-1)处亚甲基CH_2的伸缩振动吸收峰明显强于地面组,说明经太空搭载后亚甲基的振动增强。此外,二阶导数谱显示在1658cm~(-1),1544cm~(-1)处的吸收峰也较地面组的高,说明太空胡芦巴组的蛋白质和氨基酸物质的含量也较高。     

3(3-RPS)并-串联机构及其运动学分析研究

针对并联机构运动学和动力学性能方面存在的问题,提出了一种新结构-3(3-RPS)并-串联机构,对3(3-RPS)并-串联机构进行了运动学方面的研究,对3(3-RPS)并-串联机构的结构特点进行了介绍,利用螺旋理论及修正的Kutzbach–Grüble公式对3(3-RPS)并-串联机构进行了自由度计算,利用机构影响系数法和螺旋理论对3(3-RPS)并-串联机构的速度和加速度进行了建模,得到了3(3-RPS)并-串联机构速度和加速度的理论模型,利用工程分析软件ADAMS和Abaqus对3(3-RPS)并-串联机构进行了运动学仿真及结构受力分析,得到了上平台在空间中的速度和加速度曲线变化图与机构的结构受力变形图。研究结果表明:3(3-RPS)并-串联机构的自由度数为9,速度和加速度值等于各层之和;本研究分析3(3-RPS)并-串联机构运动学的方法也适合其他并-串联机构。     

Morphologic changes of starch granules in the apple cv. Mutsu during ripening and storage

Unripe (A), semiripe (B), and ripe (C) apples (Malus domestica cv. Mutsu) stored (2–4 °C, 90–95% RH) for 1 week were studied. The decrease in the starch content was as a function of storage time and ripeness. The size (area, perimeter and circularity) of starch granules was determined by image analyzer (Semper6, Synoptics) interfaced with a standard light microscope (Olympus, BH²) using a bright field illumination. Area (Ar) (larger than 100 pixel), perimeter (Pe), and circularity (Ci) of the granules were measured. The distribution of Ar, Pe, and Ci was calculated by the Distribution Fitting Statistical program; normality of frequency distribution of data (Chi-square test), average ± standard deviation, t-values were presented. All data were analyzed by principal component analysis. Area and perimeter decreased, circularity increased with the storage time and ripeness. Critical differences were observed in the semiripe apple cortex (CoB0) and the ripe apple skin (SC0) compared with the other samples (unripe skin and cortex) at the harvest. In both samples, most starch granules swelled (19–24%), and the starch contents were significantly less than in others. The stage of ripeness could be more exactly followed by image analysis than by the starch iodine test, or the color of apple skin. The ultrastructure (SEM) of starch did show typical changes as a function of storage time. More smaller starch granules could be seen in the stored apples than in the fresh ones. Damaged (pits, cavities) starch granules were found in all samples. Carbon-13 NMR spectra of isolated apple cortex starch were obtained with cross polarization (CP), magic angle spinning (MAS), and high power proton irradiation (HD). There were shoulders on the C-1 resonance and on the C-2, 3, 4, 5 cluster. These shoulders indicate the presence of amorphous starch.     

真空阴极电弧沉积（Ti,Al）N薄膜的应用研究

为了提高TiN涂层刀具的耐磨性,采用钛铝合金靶,以真空阴极电弧沉积法制备了（Ti,Al)N涂层,对膜层形貌成分,组织结构及硬度进行了测试及研究,并试验了（Ti,Al)N涂层高速钢钻头及YG6硬质合金刀具的使用寿命,结果表明：（Ti,Al)N涂层硬度高达HV0．1,15,3700,（Ti,Al)N涂层使高速钢钻头及YG6硬质合金刀具的使用寿命显著提高。     

两种方法学检测锌钙镁铁与糖尿病性肾病分级的相关性

目的探讨化学法和原子吸收法检测锌(Zn)、钙(Ca)、镁(Mg)、铁(Fe)与糖尿病性肾病的分级相关性。方法选取201例糖尿病肾病(DN)病人,男124例占61.69%;女77例占38.31%,年龄23-93岁,并根据MDRD方程结果进行分级(CKD1期:135例,CKD2期:39例,CKD3期:8例,CKD4期:4例,CKD5期:5例)。检测所研究对象的Zn、Ca、Mg、Fe、肌酐(CREA)、尿素(UREA)、尿酸(UA)、糖化血红蛋白(HbA1c)、糖化白蛋白(GA%)、尿白蛋白/尿肌酐(UALB/UCREA)、24小时尿蛋白定量(24hUTP)。结果原子吸收法全血Zn CKD2期和CKD3期水平分别为(73.15±5.24,73.34±3.82)umol/L低于CKD1期(76.40±5.31)umol/L(P<0.05),原子吸收法全血Ca在CKD2(1.45±0.04)mmol/L期低于CKD1期(1.48±0.04)mmol/L(P<0.05)。与化学法检测得其它项目Zn、Ca、Mg、Fe在CKD1至5期间无显著差异。化学法和原子吸收法两方法间有统计学意义(P<0.05)。化学法Zn和Mg极强相关,在Zn和Fe、Mg和Fe中等相关,Ca和UALB/UCREA负相关。原子吸收法Zn和Ca中等相关;Ca和Fe、Mg和UALB/UCREA正相关;Zn、Ca和CKD分级负相关。原子吸收法与化学法检测四元素Zn、Ca、Mg、Fe有统计学差异(P<0.05)。结论原子吸收法锌在CKD2、3期低于CKD1期,原子吸收法钙CKD2期低于CKD1期。原子吸收法较化学法有更好的提示糖尿病肾病CKD1期转为CKD2~5期。