基于Labwindows/CVI雾化试验台测控系统设计

燃料的雾化状态对燃烧性能有很大影响,为了研究煤油等液态燃料在不同功率和空燃比下的雾化特性,对液态燃料雾化特性的实验测量进行了研究,设计了一套自动化的雾化实验台;试验台测控系统软件基于LabWindows/CVI编写,可实现参数设置、设备检测、数据采集和数据处理等功能,软件架构采用多线程编程方法,能有效防止采集过程中进行其他操作引起的数据丢失,并保证用户操作的及时响应;为了提高系统的可靠性和稳定性,程序中设计了操作顺序和异常情况处理功能;系统具有开发周期短、稳定、使用方便、易升级的特点。     

SNMP跨平台移植和交换机端口IP探测

在复杂的网络环境中,获取交换机端口IP对于网络监控和硬件维护是很有意义的.介绍了支持SNMPv3的Net-Snmp在Linux主机上的移植配置过程和SNMP 的跨平台移植方法.在此基础上,分析提出了一种基于SNMP和ARP的交换机端口IP通用探测方案,并给出了多平台的详细算法描述.该方案已经被应用到空管系统的网络中.经实践检验,该方案快速准确,具有令人满意的效果.     

Entanglement of formation and concurrence for mixed states

We review some results on analytical computations of the measures for quantum entanglement: entanglement of formation and concurrence. We introduce some estimations of the lower bounds for the entanglement of formation in bipartite mixed states, and of lower bounds for the concurrence in bipartite and tripartite systems. The results on lower bounds for the concurrence are also generalized to arbitrary multipartite systems.     

Physiological and psychophysical responses in handling maximum acceptable weights under different footwear--floor friction conditions

A study on combined manual materials-handling tasks performed on floors under three friction levels was conducted. Eight male subjects participated in the study. The maximum acceptable weight of handling, including lifting, carrying for 3m, lowering, and walking 3m back at twice per minute was determined. The subject then performed the same tasks for 10 min. Heart rate, Vo2, energy efficiency, perceived sense of slip, and rating of perceived exertion for whole body strain were measured. The results showed that the effects of friction level on the maximum acceptable weights of handling, perceived sense of slip, Vo2, and energy efficiency were statistically significant (p相似文献   

开发支持IPv6的应用程序

随着IPv6(Internet Protocol Version 6）网络的部署,程序员必须面对多种地址协议族（Address Families,AF)的接口（socket）连接问题,使其程序同时支持IPv6和IPv4。结合作者的实验经验,研究网络编程时处理多个地址协议族的问题,以期实现与地址协议族无关的编程。     

Investigation on AQ11，ID3 and the Principle of Discernibility Matrix

The principle of discernibility matrix serves as a tool to discuss and analyze two algorithms of traditional inductive machine learning,AQ11 and ID3.The results are:(1) AQ11 and its family can be completely specified by the principle of discernibility matrix;(2) ID3 and be partly,but not naturally,specified by the principle of discernibility matrix;and (3) The principle of discernibility matrix is employed to analyze Cendrowska sample set,and it shows the weaknesses of knowledge representation style of decision tree in theory.     

Model selection for convolutive ICA with an application to spatiotemporal analysis of EEG

We present a new algorithm for maximum likelihood convolutive independent component analysis (ICA) in which components are unmixed using stable autoregressive filters determined implicitly by estimating a convolutive model of the mixing process. By introducing a convolutive mixing model for the components, we show how the order of the filters in the model can be correctly detected using Bayesian model selection. We demonstrate a framework for deconvolving a subspace of independent components in electroencephalography (EEG). Initial results suggest that in some cases, convolutive mixing may be a more realistic model for EEG signals than the instantaneous ICA model.     

浅谈高职高专“VB程序设计”课程的教学方法

编程是计算机应用的一个重要方面。主要讨论在高职高专院校“VB程序设计”课程教学中,如何培养学生的学习兴趣,设计教学的主要环节,用运多媒体案例教学,激励学生创新意识,提高编程能力。     

The effect of shoe sole tread groove depth on the friction coefficient with different tread groove widths, floors and contaminants

Slipping and falling are common phenomena in both workplaces and our daily activities. The risks associated with slipping and falling are related to the materials of footwear/floor, contamination condition, and geometric design of the sole. Shoe soles of various tread design are very common. Tread pattern of the shoe affects friction especially under liquid-contaminated conditions. Verification of the effects of tread groove depth is significant in assisting designers in designing proper footwear for workers exposed to slippery floor conditions. In this study, we measured the friction coefficients using the Neolite footwear pads on the terrazzo, steel, and vinyl floors under three liquid-contaminated conditions. A Brungraber Mark II slipmeter was used. The footwear pads had tread grooves with a width of either 3 or 9 mm. The depth of the tread grooves ranged from 1 to 5 mm. The results showed that tread groove depth affected the friction coefficients significantly. Higher friction values were recorded for footwear pads with deeper tread grooves on wet and water–detergent-contaminated floors. The averaged coefficient of friction (COF) gain per tread groove depth increase in millimeter under these two surface conditions ranged from 0.018 to 0.108, depending on the tread groove width, floor, and contaminant.     

基于实时数值模拟的泥石流危险性分区系统研究*

为深入分析揭示泥石流的形成和运动等规律,提高泥石流灾害防治的信息技术应用水平,以VC++和Super MAP混合编程为主要技术,应用计算机可视化技术,研究并实现了基于动量和动能数值模拟的、实时泥石流危险性分区技术。系统以云南东川蒋家沟泥石流作为研究对象,以实验数据和实测数据进行设计和构建。