基于VC6.0的SR830数据采集系统的设计与实现

基于VC6.0实现了对SR830锁相放大器串口数据的精确采集与监测.首先,分析了光电检测系统中常用的SR830锁相放大器的串口数据传输特点,并分析了VB等环境下使用通信控件开发采集软件的不足.其次,通过需求分析,从框架建立、图形显示、通信设计等方面,对系统结构进行了构建.最后,基于VC6.0和重叠I/O,实现了数据采集系统.结果显示,该系统实现了对SR830数据的实时精确采集、显示和事后保存、历史文件比较等功能,克服了之前软件易发生溢出错误的问题,满足了光电化学检测的需要.     

中国汽车零部件产业集群现状与竞争力分析

随着中国汽车工业的快速发展,我国汽车零部件产业也走上了集群式发展之路。然而我国汽车零部件产业集群发展现状不容乐观,建议通过系统集群、加强产业环境建设、合理规划产业园区、优化零部件产业结构以及支持海外并购等途径,使我国汽车零部件产业集群能够走上良性循环发展之路。     

高炉探尺全数字直流调速系统

介绍了全数字直流调速装置SIMOREGK6RA24在高炉探尺系统中的运用，该系统具有控制精度高，组态方便，调试简单，故障率低等优点。     

开闭裂纹转子的模型化与动态仿真

基于所建立的开闭裂纹转子系统的非线性动力学模型，对裂纹转子在不同激励参数下的开闭条件进行了预测，并对转子运行轨道和频谱响应进行了动态仿真．结果表明，对裂纹开闭条件的预测是正确的，同时转子出现裂纹时显示出特殊的动力学特性     

VPN技术在彩票销售系统中的应用

文章从多个层面介绍了基于宽、窄带VPN技术原理。阐述了VPN技术在彩票销售业以及其他行业中的应用优势和实现方式。     

含氮含硫有机物的键裂能的计算

】本文建立了用基团电负性计算含氮含硫有机物的键裂能的简单方法。利用此方法计算出２２个含氮含硫烷基衍生物的键裂能，其平均偏差为３．９７ｋＪ·ｍｏｌ－１。     

Opening the attentional window in attentional blink: An attentional cuing study

To investigate whether the functioning of cognitive control is contingent upon the attentional set in attentional blink (AB), which is a deficit in reporting the second (T2) of two targets when it occurs 200—500 ms after the first (T1) in a rapid serial visual presentation (RSVP) stream, this study examined the pattern of cuing effects in which two kinds of colored cues match (i.e., in the same attentional set) or mismatch (i.e., in a different attentional set) the color of the upcoming T2. Participants of the study were asked to monitor T1 and T2 in triple RSVP streams while the cue-T2 onset synchrony (CTOA) varied from 90 ms to 270 ms and the cue and T2 might or might not occur in the same RSVP stream as T1. Relative to the uncued condition, both the same-color and the different-color cues produced cuing effects, but the effect was larger and lasted for a longer time for the former than for the latter, whether the cue (and T2) and T1 occurred in the same stream or not. Cues with short CTOA in general enhanced T2 performance more greatly during the AB period than outside of the AB period, suggesting that cues with short CTOA could open the attentional window in advance of T2 and thus facilitate the T2 processing. These findings are consistent with the theory that the salient stimulus captures attention and opens the attentional window irrespective of the attentional set defined for the target; but the attention capture effect of the cue can be quickly overridden by the top-down control when the cue does not match the attention set. Thus both the top-down attentional control setting and the bottom-up attentional capture process function during attentional blink.     

P区元素含氧酸氧化还原性探讨

提出了Ｐ区元素含氧酸氧化还原性的变化规律，并众键能，分子稳定性，酸根离子的结构对称性，中心原子成键电子的能量及含氧酸分解产物的特性等方面，分析了讨论了引起含氧酸氧化还原性差异的原因。