基于通信的港口管理系统的研究

讨论了如何利用Access7.0设计包含有通信的管理信息系统，并结合生产管理系统的实例。利用微软公司的Visual Basic中包含的通信控件，实现Windows95环境下通信程序的设计方法，介绍了通信控件的属性以及使用方法，给出了基本的通信程序。     

Mining process models with non-free-choice constructs

Process mining aims at extracting information from event logs to capture the business process as it is being executed. Process mining is particularly useful in situations where events are recorded but there is no system enforcing people to work in a particular way. Consider for example a hospital where the diagnosis and treatment activities are recorded in the hospital information system, but where health-care professionals determine the “careflow.” Many process mining approaches have been proposed in recent years. However, in spite of many researchers’ persistent efforts, there are still several challenging problems to be solved. In this paper, we focus on mining non-free-choice constructs, i.e., situations where there is a mixture of choice and synchronization. Although most real-life processes exhibit non-free-choice behavior, existing algorithms are unable to adequately deal with such constructs. Using a Petri-net-based representation, we will show that there are two kinds of causal dependencies between tasks, i.e., explicit and implicit ones. We propose an algorithm that is able to deal with both kinds of dependencies. The algorithm has been implemented in the ProM framework and experimental results shows that the algorithm indeed significantly improves existing process mining techniques.     

Reliability-based failure cause assessment of collapsed bridge during construction

Until now, in many forensic reports, the failure cause assessments are usually carried out by a deterministic approach so far. However, it may be possible for the forensic investigation to lead to unreasonable results far from the real collapse scenario, because the deterministic approach does not systematically take into account any information on the uncertainties involved in the failures of structures.Reliability-based failure cause assessment (reliability-based forensic engineering) methodology is developed which can incorporate the uncertainties involved in structural failures and structures, and to apply them to the collapsed bridge in order to identify the most critical failure scenario and find the cause that triggered the bridge collapse. Moreover, to save the time and cost of evaluation, an algorithm of automated event tree analysis (ETA) is proposed and possible to automatically calculate the failure probabilities of the failure events and the occurrence probabilities of failure scenarios. Also, for reliability analysis, uncertainties are estimated more reasonably by using the Bayesian approach based on the experimental laboratory testing data in the forensic report. For the applicability, the proposed approach is applied to the Hang-ju Grand Bridge, which collapsed during construction, and compared with deterministic approach.     

基于窗口的面向对象的GUI设计

文中讨论了一种基于窗口的对象用户界面设计思想及方法，详细描述了各种类的定义。在ＤＯＳ环境下运用ＷａｔｃｏｍＣ＋＋语言在微机上开发运行。它可以使用户方便地进行再开发工作，界面运用事件处理方式由窗口、弹出菜单、图标、按钮等组成。效果良好。     

Using CANARY event detection software for water quality analysis in the Milwaukee River

Urban water sources are susceptible to various contamination events as a result of natural, accidental, and human-induced occurrences. An early warning monitoring system provides timely information on changes in urban water quality. In this study, an analysis was made with CANARY event detection software (EDS) to monitor water quality parameters in river water and to identify the onset of anomalous water quality periods. Water quality signals including pH, conductivity, and turbidity from the Milwaukee River over specified periods during the summer season of 2018–2020 were employed as inputs to event detection algorithms in CANARY. The data analysis results show that CANARY can be useful as an early warning system for monitoring contamination in urban water sources and help to identify abnormal conditions quickly. The sensibility of the model relies on optimizing the configuration parameters, which involves selecting the ideal set of parameters for the event detection algorithm and adjusting the BED parameters to increase or decrease the probability of generating an alarm. The number of events reported between the Linear Prediction Correction Filter (LPCF) and Multivariate Nearest Neighbor (MVNN) algorithms varied as a result of different residual calculation mechanisms. Climate factors that contributed to the abnormal water quality events in the river were examined. The analysis of rainfall on water quality was carried out using a statistical method by determining whether there is a significant difference (p-value) between the seasonal mean water quality data and the mean value of water parameters during the sampling duration. Regression analysis was also performed to estimate the best model that describes the relationship between each of the water quality parameters and temperature.     

基于EFPN的模糊离散事件系统可诊断性分析

针对模糊有限自动机及模糊Petri网在模糊离散事件系统(Fuzzy Discrete Event System,FDES)行为建模中的不足,提出一种扩展模糊Petri网(Extended Fuzzy Petri Net,EFPN),并基于EFPN构造了FDES行为模型及系统故障诊断器。EFPN以一种新的事件模型为基础对FDES的系统行为进行建模,并根据事件触发矩阵计算下一系统状态中各分量的可能性分布。与模糊有限自动机及模糊Petri网的对比分析表明,在描述FDES模糊事件时,对于同步距离为0的一组事件所造成的影响,EFPN的表达能力强于经典模糊Petri网;在对含有多个状态分量的FDES建模时,EFPN模型的规模远小于模糊有限自动机。在基于EFPN构造的系统行为模型中,运用可达状态标识图分析系统状态集,可有效地构造FDES的故障诊断器,并可据此进行系统可诊断性分析。     

面向微博内容的信息抽取模型研究

社会媒体是人们用来分享意见、见解、观念和经验的平台或工具,目前已经发展成具有重大影响力的新媒体。而微博作为社会媒体的一个重要部分,对信息的传播起到了很大的作用。面向微博内容的信息抽取就是要从充满噪音的、零碎的、非结构化的微博内容的自由文本中提取有价值的结构化的信息,以利于从微博内容中有效地获取信息。提出了一种基于因子图的微博事件抽取方法来准确地抽取微博中所反映的事件。最后通过实验验证了该方法在性能和准确性上都比其他的方法要高。     

一种WSN中的三层多维事件协作检测算法

提出了一种适用于无线传感器网络的三层多维事件协作检测算法。传感器节点通过计算均值向量序列的相似度发现异常,并通过投票机制确认事件发生。簇头节点根据边界向量序列的相似度,利用改进的K均值聚类算法对多维事件数据进行分类和合并。汇聚节点利用事件属性数据的概率分布,匹配检测出事件的类型。理论分析和仿真试验的结果表明:与传统集中式的事件检测算法相比,该算法能在噪声干扰下提高对多维事件的检测精度,降低算法的通信量和计算复杂度,延长网络的生存时间。     

事件驱动RFID系统开发及其应用

随着RFID硬件技术的不断成熟和生产成本的不断降低,RFID已广泛应用于零售超市、物流与供应链管理、图书管理、设备与资产管理等实时监控和追踪领域。本文主要研究事件驱动的RFID系统开发方法,该方法通过将大量数据表示成不同类型事件（包括原始事件和复杂事件）,设计了事件驱动的RFID事件处理框架。基于此框架,研究了基于Hash表事件过滤机制和复杂事件匹配方法,以实现对RFID事件流的实时分析与处理。最后,结合一个RFID模拟零售超市管理系统,验证了方法的可行性和有效性。