基于CAN总线的分布式产品老化测试系统

介绍了基于CAN总线的分布式电子产品老化测试系统，给出了分布式产品老化测试的具体实现方法，并对智能测控节点的硬件设计及测试实现方法作了较详细的说明。该系统可实现对电子产品的功能和性能作在线老化测试，报告出测试产品及其主要单元模块中的失效性，分拣产品故障，为改进工艺和提高质量提供决策。目前系统已投入智能水表、管网测控终端等智能产品的生产测试应用中，可推广应用于其它智能型电子产品的老化测试。     

基于CCP的AMT电控单元标定系统开发

为方便、快捷、稳定地对AMT电控系统进行标定,采用基于CCP协议的通讯标准,以某AMT系统为平台,开发了AMT电控系统标定仪。试验证明,所设计的标定仪能较好的实现预期功能且性能稳定。     

Application of Biological Acidification to Improve the Quality and Processability of Wort Produced from 50% Raw Barley

In this study four strains of lactic acid bacteria (LAB) were chosen to bioacidify a mash containing 50% barley and 50% malt. The strains were isolated from malted and unmalted barley and assayed for extracellular enzymatic activities (proteases, amylases, β‐glucanases). The biologically acidified mash was compared to a chemically acidified mash, 100% malt mash un‐acidified and 50% malt and 50% barley mash unacidified. Characteristics such as pH, extract, colour, viscosity, total soluble nitrogen (TSN), free amino nitrogen (FAN), apparent fermentability, β‐glucan and lautering performance of the resultant worts were determined. A model lautering system replicating one used in a brewery was designed and built in University College Cork (UCC) to measure the lautering performance of the bioacidified mashes. The new system was compared to the filtration method used in EBC method 4.5.1. Overall the addition of LAB to bioacidify a mash of 50% barley and 50% malt resulted in faster filtration times, which correlated with decreased β‐glucan levels. Proteolytic LAB had a positive influence on the quality of wort and resulted in increased FAN levels. Lighter colour worts were observed along with increased extract levels.     

基于DSP技术与USB2.0的数据采集实时处理系统

数据采集与实时处理技术广泛应用于雷达、通信、遥测遥感、海洋监测等领域,主要介绍一种基于DSP和USB2.0技术的双通道数据采集与实时处理系统设计方案,该方案采用TMS320C6713B作为核心处理芯片,CY7C68013为USB2.0接口芯片,给出了多通道采集系统的硬件设计及软件编程方法。     

In vitro β‐Carotene Bioaccessibility and Lipid Digestion in Emulsions: Influence of Pectin Type and Degree of Methyl‐Esterification

Citrus pectin (CP) and sugar beet pectin (SBP) were demethoxylated and fully characterized in terms of pectin properties in order to investigate the influence of the pectin degree of methyl‐esterification (DM) and the pectin type on the in vitro β‐carotene bioaccessibility and lipid digestion in emulsions. For the CP based emulsions containing β‐carotene enriched oil, water and pectin, the β‐carotene bioaccessibility, and lipid digestion were higher in the emulsions with pectin with a higher DM (57%; “CP57 emulsion”) compared to the emulsions with pectin with a lower DM (30%; “CP30 emulsion”) showing that the DM plays an important role. In contrast, in SBP‐based emulsions, nor β‐carotene bioaccessibility nor lipid digestion were dependent on pectin DM. Probably here, other pectin properties are more important factors. It was observed that β‐carotene bioaccessibility and lipid digestion were lower in the CP30 emulsion in comparison with the CP57, SBP32, and SBP58 emulsions. However, the β‐carotene bioaccessibility of CP57 emulsion was similar to that of the SBP emulsions, whereas the lipid digestion was not. It seems that pectin type and pectin DM (in case of CP) are determining which components can be incorporated into micelles. Because carotenoids and lipids have different structures and polarities, their incorporation may be different. This knowledge can be used to engineer targeted (digestive) functionalities in food products. If both high β‐carotene bioaccessibility and high lipid digestion are targeted, SBP emulsions are the best options. The CP57 emulsion can be chosen if high β‐carotene bioaccessibility but lower lipid digestion is desired.     

工业计算机和PLC相结合的DDC控制系统在电渣重熔炉中的应用

介绍采用工业计算机和PLC相结合组成的DDC控制系统,及其在某钢厂全自动电渣炉中的应用。     

USB2.0接口系统的设计与应用

提出了一个新颖实用的USB2.0接口系统架构,基于此架构设计了一个PC和设备之间的USB2.0接口系统。系统设计包括了硬件电路、MCU固件、主机驱动和应用程序。设计着重于批量传送功能,经FPGA验证,在数码相机系统应用中,传输稳定可靠。     

基于Web2.0的情景应用程序的构建研究

在企业软件应用中,开发生命周期短、面向业务的情景应用程序需求大量增加。随着新一代互联网Web 2.0的普及,推动了基于Web 2.0的情景应用程序的发展。本文提出基于Web 2.0的情景应用程序体系结构,并阐述如何创建一个实例。     

PREPARATION OF HOP EXTRACTS RICH IN PARTICULAR CONSTITUENTS*

When a column containing powdered hops is extracted with liquid carbon dioxide, chromatographic separation of hop components occurs. They are extracted in the order essential oils, β-acids, α-acids; and the separation is enhanced when finely milled hops are extracted. Early fractions (～0·5 hour) contain a high proportion of the available essential oils when hops are extracted at ?20°C and such extracts are suitable as a replacement for dry hops. Fractions can be obtained from extractions at ～7°C which are rich in α-acids and contain low levels of β-acids. Small amounts of fats and waxes are normally present in fractions collected towards the end of a run when seeded hops are extracted.     

车用CAN总线网络快速原型的设计实现

本文分析了车用CAN总线网络的特征,设计并实现了车用CAN总线网络快速原型系统,解决了将基于快速原型的嵌入式软件设计和基于网络仿真的系统分析相结合的问题。最后使用THECU-2003硬件平台与Simulink下的控制模型共同组成的实验环境验证了系统设计的有效性。