针对车辆AEB系统失效和误作用场景的研究

本文基于预期功能安全,采用功能分解方法,总结出部分车辆自动紧急制动(AEB)系统失效和误作用场景,并从中选取典型场景作为测试场景,开展不同车型的实车道路试验,总结出AEB系统的缺陷与隐患分类.希望此类研究能为AEB系统失效和误作用测试标准的制定提供参考.     

基于BP神经网络的拱坝风险评价研究

拱坝坝高库大,环境条件复杂,又多处于高烈度地震区;一旦失事,后果不堪设想。不但会严重影响工农业生产、重创国民经济,而且会使人民生命财产遭受极大损失,产生恶劣的政治影响。因此,拱坝的风险分析与风险评价越来越受到力学界、坝工界、政府的高度重视和社会各界的广泛关注。利用神经网络的方法,研究具有拱坝风险评价问题,建立了基于BP神经网络的评价模型。     

基于SOA的数字化校园解决方案研究

为了解决高校应用系统的"信息孤岛"效应,实现各应用系统之间数据的交互和共享,论文提出了一种基于SOA的数字化校园解决方案,该方案基于SOA体系架构,采用IBM的WebSphere软件体系和J2EE技术路线作为支撑,是一种优秀的数字化校园整体解决方案。     

Analyzing quantile spillover effects among international financial markets

This paper investigates the quantile-based spillover effects among 17 stock markets from January 1993 to January 2022, utilizing a quantile approach based on the variance decomposition of a quantile vector autoregression (QVAR) model. Compared with the traditional mean-based spillover measures, this new quantile approach allows for a nuanced investigation of spillovers at every quantile and capture spillovers under extreme events. The results show that: (1) the total spillover is high and exhibits strong time-varying characteristics, and the tail spillover is higher and more complex in scale and direction; (2) the spillover at each quantile level shows an upward trend, especially during the 2008 crisis and the COVID-19 epidemic; (3) developed countries (or regions) are the net exporters of stock market spillovers, while the developing countries are the net importers; and (4) the 17 stock markets constitute different local financial networks, which may be related to economic conditions and geographical location.     

Video-based pedestrian grouping model considering long-span space in a big hall

Pedestrian group detection is a challenging but significant issue in pedestrian flow control and public safety management. To address the issue that most conventional pedestrian grouping models (PGMs) can only identify a pedestrian group at a limited distance of less than 2 m, this study extended the pedestrian distance constraint of conventional PGMs with a reconstruction of the normal group detection criterion and development of a novel group detection criterion suitable for long-span space. To measure the movement behavior similarity with normal distance, five necessary constraints: velocity difference, moving direction offset, distance limitation, distance fluctuation, and group-keeping duration were studied quantitatively to form the criterion to detect normal groups. Meanwhile, a long-span group detection criterion was proposed with extended distance and direction consistency constraints. Therefore, this study proposed an improved PGM that considers long-span spaces (PGMLS). In the PGMLS workflow, the MMTrack algorithm was used to obtain pedestrian trajectories. A difference measurement method based on sequential pattern analysis (SPA) was adopted to analyze the velocity similarity of pedestrians. To validate the proposed grouping model, experiments based on pedestrian movement videos in the exit hall of the Shanghai Hongqiao International Airport were conducted. The results indicate that the proposed model can detect both normal and widely separated pedestrian groups, with a long span range of 2–12 m.     

血栓通治疗冠心病有效性和安全性的Meta分析

目的综合评价血栓通治疗冠心病的有效性和安全性,为临床治疗决策提供科学依据。方法利用计算机检索文献,并进行筛选,在对纳入文献进行方法学质量评价后,应用RevMan5.0软件,采用固定效应模型或随机效应模型对纳入文献进行Meta分析。结果本研究共纳入31篇文献,质量评级均为C级。在心电图总有效方面,血栓通单用VS复方丹参单用、血栓通联用其它药物VS复方丹参联用其它药物、血栓通联用硝酸甘油VS硝酸甘油、血栓通联用其它药物VS其它药物比较,RR及95%CI分别为1.45（1.29～1.62）、1.19（1.01～1.41）、1.22（1.10～1.34）、1.28（1.19～1.38）,差异具有统计学意义。在心绞痛总有效方面,血栓通联用其它药物VS其它药物、血栓通联用硝酸甘油VS硝酸甘油比较,RR及95%CI分别为1.28（1.19～1.38）、1.30（1.15～1.48）,差异具有统计学意义。敏感性分析验证了结果的稳定性。结论血栓通不论是单用还是与其它药物联合应用,在心绞痛和心电图总有效方面均较其它药物优秀。     

德国煤矿安全生产管理的经验及启示

近年来,虽然我国煤矿安全生产在稳步好转,但是,仍然面临严峻的形势,重特大事故仍时有发生。尤其是与发达国家德国相比,我国的煤矿安全生产管理还有待加强与改善。所以,本文试图提出合理地借鉴德国的煤矿安全生产管理经验,以推进和完善我国的煤矿安全生产。     

浅谈新时期高校学生会工作

社会主义市场经济和高等教育的改革与发展,使传统的高校学生管理工作面临严峻挑战。学生会作为高校学生管理工作的重要组成部分,积极探索适应时代要求的高校学生会工作模式,发挥其“自我教育、自我管理、自我服务”的作用,巩固党和团组织在青年学生中的群众基础,有效占领大学生思想教育阵地已成为目前学生工作者面临的重要课题。     

网络辅导——信息媒体环境下新的辅导手段

辅导是教师授课的延伸和补充,网络可以实现辅导的无时限性和学生学习的无时限性,学生可在课后浏览、学习、提问、讨论和自测。同时利用建立的辅助教学站点与学生进行随时的交流,实现了个别化教学与整体化教学的高度统一,充分提高了教师的辅导质量和学生的学习质量。     

对构建和谐校园基本要素的思考

高校作为培养国家人才的重要基地,营造和谐的校园氛围,构建依法治校、充满活力、协调稳定的良好环境,对大力推进学校的健康发展将起到极大的作用,同时对构建社会主义和谐社会也将发挥着重大的建设性作用。