基于VB和单片机的温湿度及火焰监控报警系统设计

本文介绍了运用VB6.0的MSComm控件完成计算机与单片机的串行通信,采用数字温湿度传感器和火焰传感器完成对数据的采集.单片机将处理后的数据上传到PC机,利用VB控件显示,并根据监测到的数据进行判断发送控制信号给单片机,进而驱动执行机构实现相应的控制.     

主成分分析-紫外光谱法同时测定四种维生素B

采用主成分分析法(PCA)完成对多组分样品分析的建模及解析研究,用于处理紫外光谱数据,实现了维生素B_1、B_2及B_6及烟酰胺四组分的同时测定,结果可靠,操作简便。     

基于VB的污水处理系统设计研究

文章主要介绍了一种基于VB的污水处理系统的设计方案,在具体的研究中,以VB语言作为前台管理程序,采用ACCESS作为后台数据库,从沉池、消毒和污水流量等方面入手,详细阐述了系统的设计需求,并为系统设计了完善的功能模块,整个系统能够实现对工厂沉淀池污水的智能化处理,具有一定的可操作性和实用性。     

基于Web的远程招生人像采集系统的设计与实现

随着我国招生事业的发展，远程招生、远程录取、网上阅卷等正在发展之中。基于浏览器／服务器的Web形式的系统有着广泛的应用前景。对招生中电子人像采集、基于Web形式的MIS系统进行了讨论，提出了自己的构思：采用插件ActiveX与ASP．NET做前端网页，采用VB．NET开发服务器的具体措施。讨论了系统的设计和实现过程。该系统可用于Web形式的人像采集，有一定的应用价值。     

Windows消息机制在VB编程中的应用

介绍了Windows消息机制，重点讨论了消息的组成，VB应用程序中消息的传送过程，分析了如何使用API函数拦截VB应用程序中对象的消息，从而解决了VB应用程序中某些对象对特定消息的不响应问题。应用文中所介绍的方法，作者在教育机器人平台软件中成功地实现了鼠标滚轮消息的拦截，提高了软件操作的灵活性。实践证明，这种消息拦截技术有很强的实用性，可以解决一些VB中用常规方法不能解决的问题，实现关键技术的突破。     

Thiamine hydrochloride(VB1):An efficient catalyst for one-pot synthesis of α-aminophosphonates under ultrasonic irradiation

An efficient synthesis of novelα-aminophosphonates by the reaction of aldehydes and amines with triethyl phosphite in the presence of the easily available,inexpensive,and nontoxic catalyst thiamine hydrochloride(VB1).This method affords theα-aminopho-sphonates under the influence of ultrasound irradiation in aqueous medium,in short reaction times(4-6 min),high yields(85-95%), with improved purity.The process is green,mild,inexpensive and excellent yields are the main compensation of this procedure.     

Graphical linking of a MO multicenter bond index to VB structures

The multicenter bond index proposed within the MO framework depends on the order of the centers for which it is calculated, outside from the 3-c case. For the 6-c case, the eventually different values are 60. A graphical approach links the MO values to VB structures. Benzene, chosen as our paradigm for the 6-c case, illustrates our proposition.     

Selective extraction based on poly(MAA‐VB‐EGMDA) monolith followed by HPLC for determination of hordenine in plasma and urine samples

Hordenine is an active compound found in several foods, herbs and beer. In this work, a novel sorbent was fabricated for selective solid‐phase extraction (SPE) of hordenine in biological samples. The organic polymer sorbent was synthesized in one step in the plastic barrel of a syringe by a pre‐polymerization solution consisting of methacrylic acid (MAA), 4‐vinylphenylboronic acid (VB) and ethylene glycol dimethacrylate (EGDMA). The conditions for preparation were optimized to generate a poly(MAA‐VB‐EGMDA) monolith with good permeability. The monolith exhibited good enrichment efficiency towards hordenine. By using tyramine as the internal standard, a poly(MAA‐VB‐EGMDA)‐based SPE‐HPLC method was established for analysis of hordenine. Conditions for SPE, including volume of eluting solvent, pH of sample solution, sampling rate and sample volume, were optimized. The proposed SPE‐HPLC method presented good linearity (R² = 0.9992) within 10–2000 ng/mL and the detection limits was 3 ng/mL, which is significantly more sensitive than reported methods. The method was also applied in plasma and urine samples; good capability of removing matrices was observed, while hordenine in low content was well extracted and enriched. The recoveries were from 90.6 to 94.7% and from 89.3 to 91.5% for the spiked plasma and urine samples, respectively, with the relative standard deviations <4.7%. Copyright © 2014 John Wiley & Sons, Ltd.     

基于单片机的课室人数智能监测与自助查询系统研究

研究了一种应用于课室在座人数实时监测的分布式自动化系统。该系统通过在课室安装一个以STC89C52单片机和YL-62红外线传感器为核心的人数进出信息反馈和处理模块,进行编码后经过CC1101无线数据发射模块将信息发送至连接PC机串口终端的接收模块,利用PC机进行解码和运算处理并最终显示在VB程序界面,从而达到远程监测与查询课室人数的目的。该系统结构简单,成本低廉,性能可靠,具有较大的应用前景。