基于XC2365和模糊算法的车辆ESP系统研究与设计

设计了基于模糊控制算法技术和微控制器XC2365的车辆电子稳定系统ESP(Electronic Stability Program)。该系统通过传感器收集车辆的行驶状态数据,并将系统送至微控制器XC2365,控制器根据模糊算法进行车辆行驶辅助控制。整个系统通过MATLAB软件仿真,满足ESP控制策略要求。通过实地实验结果表明该系统安全性强,能够适应各种路况要求,保证车辆在行驶过程的稳定性和驾驶员的人身安全。     

潜油电泵变频节能分析

本文根据潜油电泵的特性曲线分析电潜泵变频调速的节能机理以及理论节能量,最后通过现场测试的电参数数据给出了潜油电泵变频调节的实际节电量。     

IPv6的网络安全分析

虽然IPv6通过IPSec提供了网络层的安全,并且增加了许多新的功能。但它是否能给网络带来真正的安全仍然值得怀疑。本文分析了IPv6在网络安全方面的优势与不足。以及如何过渡到IPv6的问题。     

化学团聚促进电除尘脱除PM2.5的实验研究

燃煤排放细颗粒物是大气环境PM_2.5增加的重要来源。采用燃煤热态实验系统,进行了在电除尘器入口烟气添加化学团聚剂以及协同脱硫废水蒸发处理促进电除尘脱除PM_2.5的实验研究。实验考察了团聚剂添加前后PM_2.5浓度及其粒度分布的变化,以及团聚剂浓度、添加点烟温、团聚剂溶液pH、烟气量、雾滴粒径等对PM_2.5脱除效果的影响。结果表明,添加化学团聚液后,通过润湿作用、液桥力和吸附架桥作用可增强PM_2.5之间的接触并促进团聚长大,PM_2.5增大到原先的4倍左右,典型工况下电除尘器出口PM_2.5浓度降低40%以上。增加团聚液浓度可促进PM_2.5的脱除;适当降低团聚液pH有利于PM_2.5的团聚。喷脱硫废水,电除尘器出口PM_2.5浓度变化不大,加团聚剂后出口细颗粒物浓度降低。     

新型极配电除尘器的开发与应用

介绍了电除尘器传统极配方式及特点。在综合波形阳极板和管状尖刺线优点的基础上,开发了波形阳极板配管状尖刺刚性线的电除尘器,该电除尘器电晕电流大、板电流均匀、运行电压高、故障率低、运行可靠,目前已在两家硫铁矿制酸装置中得到试用,实际运行效果良好。     

O2/CO2燃烧对电除尘器运行的影响

通过分析空气分离/烟气再循环燃烧特性,建立了O2/CO2条件下烟气中CO2,SO2,H2O,N2,O2成分的数学模型。通过与空气条件下的燃烧对比得出:采用空气分离/烟气再循环燃烧,烟气中水蒸气、二氧化硫和二氧化碳的含量增大较多,起晕电压略有增加,火花电压提高较多,这些变化有利于电除尘器的运行。     

变频电潜泵在排水采气工艺中的应用

详细阐述了电潜泵的基本工作原理,指出了电潜泵排水采气工艺的适用范围与特点,并以蜀南气矿多口电潜泵工艺井为例,对电潜泵排水采气过程中出现的诸如气体干扰、天然气渗入电缆绝缘层导致电缆损坏等问题做了详细的分析,并提出了解决这些问题的具体方法.总结了多年来电潜泵排水采气工艺成功与失败的经验,对今后该项工艺的发展与推广有指导作用.     

基于诊断流程图的汽车ESP典型故障诊断与排除方法探究

汽车ESP(Electronic Stability Program)是一种新型主动安全控制系统,能够显著的提高汽车的操纵稳定性和行驶安全性,故在目前国内外汽车上均得到普遍运用。本文在分析汽车ESP结构和原理的基础上,结合汽车故障诊断常用的方法,提出了运用诊断流程图分析的方法,并通过具体的案例,探究了汽车ESP典型故障诊断与排除方法。实践证明,这种诊断方法,可以帮助维修人员快速、准确的分析故障原因,确定故障部位,最终排除故障,维持汽车行驶中良好的技术状态,最大程度的减少人员伤害和财产损失。     

Why psychologists must change the way they analyze their data: The case of psi: Comment on Bem (2011).

Does psi exist? D. J. Bem (2011) conducted 9 studies with over 1,000 participants in an attempt to demonstrate that future events retroactively affect people's responses. Here we discuss several limitations of Bem's experiments on psi; in particular, we show that the data analysis was partly exploratory and that one-sided p values may overstate the statistical evidence against the null hypothesis. We reanalyze Bem's data with a default Bayesian t test and show that the evidence for psi is weak to nonexistent. We argue that in order to convince a skeptical audience of a controversial claim, one needs to conduct strictly confirmatory studies and analyze the results with statistical tests that are conservative rather than liberal. We conclude that Bem's p values do not indicate evidence in favor of precognition; instead, they indicate that experimental psychologists need to change the way they conduct their experiments and analyze their data. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Modeling and simulation of an oxy-fuel combustion boiler system with flue gas recirculation

In this paper, a mathematical model of an oxy-fuel combustion boiler system with flue gas recirculation is investigated. The reduction of CO₂ emission from coal-fired power plants is an important research issue in alleviating the global warming. The entire dynamics are decomposed in two main parts; fire-side dynamics and water-side dynamics. The fire-side dynamics consist of the mass and energy balance equations in the furnace (combustion process) and the flue gas dynamics represented by the mass balance equations of five gases (O₂, CO₂, SO₂, H₂O and NO₂). The water-side dynamics include a drum pressure equation and a steam temperature equation. To validate the developed models, the real experimental data in Karakas, Koumanakos, et al. (2007) are used. To investigate the local behavior near an operating point, a linearization method at its steady-state condition is pursued. The time responses of the entire dynamics using step inputs (the oxygen mass flow rate, the coal mass flow rate, the primary air mass flow rate, etc.) are also discussed.