散粮筒仓系统消防应急灯具的选择

《消防应急照明和疏散指示系统技术标准》(GB 51309—2018)的实施,结束了消防应急照明不统一的乱象,在设计工作中得到广泛应用。本文针对散粮筒仓系统中消防应急灯具的选择进行了分析。     

Meanings of leisure for older people: an Australian study of line dancing

In Australia and in many parts of the world, older people participate in line dancing. Our phenomenological study explored whether attending a regular line dancing class might offer a group of older people opportunities for active and successful ageing. Our research investigated the meanings and practices fostered in a community line dancing class in Melbourne. We gathered data via an interview with the teacher of the group, observation of a class and two focus group interviews with 25 members. Data were analysed using Interpretative Phenomenological Analysis that is reported thematically under headings of: Belief in the efficacy of line dancing, Physical and emotional benefits, YouTube clips as instructional reinforcement and promotion, and Socialising. The findings show that participation in the class offered older student’s opportunities for dance and music engagement, active and successful ageing, health and well-being, social connection and purposeful leisure. The teacher of the class modelled serious and successful leisure and advocates for dance as holistic training for older people. We position our participants on a continuum of leisure engagement that ranges from the casual to the serious. Further research is required to support arguments for the efficacy of dance as a leisure pursuit for older adults.     

Negotiating leisure constraints: the case of an amateur musician with epilepsy

The purpose of this case study was to identify the negotiation strategies employed by an epileptic amateur musician engaged in serious leisure to overcome leisure constraints. Data were collected by semi-structured interview, observation and informal interaction. Results revealed that the subject employed various cognitive (i.e. anticipating benefits, weighing pros and cons, immediate resolving, accepting costs and pragmatism about performance) and behavioural (i.e. planning/event management, scaling back participation and communication and cooperation) negotiation strategies. While strategies were employed to overcome constraints, participation was also facilitated by individual beliefs and interpersonal relationships. Results also suggested that negotiation strategies are interconnected, and that perceived stigma did not influence participation in serious leisure.     

大兴安岭森林火烧对土壤生境质量影响研究

森林火烧是一种自然或人为因素产生的干扰,能够改变当地土壤的物理性质、化学性质及生物指标,对土壤的性质与土壤的肥力影响较大,对农业生态系统的结构与功能影响深远。作为我国重点的国有林区,大兴安岭地区林地面积广阔,森林覆盖率高,是我国生态安全的重要保障区,拥有丰富的林业资源,林下适生农业经济作物有500多种,林木、柞蚕、林果及中草药等绿色种养产业的资源十分丰富,是当前大兴安岭发展现代农业的主要模式。大兴安岭是我国森林火灾的多发区,文章对近年来国内专家学者对火烧影响森林土壤的理化性质与生物指标等众多研究成果进行综合评述,近年来,研究者从大兴安岭不同地区、不同林火种类与林火强度系统分析并研究了火烧对土壤生境质量的影响,该文通过对其进行归纳总结,旨在为该地区的火烧迹地植被恢复及农业林下经济的科学经营管理提供科学依据。     

基于红外图像的林火识别方法及实现

森林火灾是一种突发性强、破坏性大且处置救助较为困难的自然灾害,会对森林、森林生态系统和人类带来一定危害和损失。早期的林火判别多基于温度、烟雾以及24小时图像监测实现,主观性强,标准单一,且误报率高。如何快速发现林火目标并及时报警扑灭,已经成为国内外学者研究的热点之一。文章基于红外热像仪,对大量森林背景及模拟林火状态进行了图像和温度数据的采集,首次提出了基于温度标准差方法进行热源识别的概念,得出了不同地点、不同时间段森林背景的温度标准差分布,以及明火温度在各阶段的波动范围,为林火的预防和监测提供了重要依据。同时,通过对干扰源进入前后的红外图像进行预处理和分析,对比目标热源的像素面积变化率及其圆形度,即可准确实现部分干扰热源的排除。实验结果证明,将此基于红外图像的热源初判原则与干扰源排除的规律应用于林火监测,方法简单有效,准确率高,对降低森林火灾的发生率,提高社会经济效益有着重要的作用。     

Measuring Serious Leisure in Chess: Model Confirmation and Method Bias

The serious leisure inventory and measure (SLIM) was tested with 348 chess players to confirm the factors, assess the effects of method bias, and propose a set of the best-performing items for the 18 factor SLIM. The 54-item SLIM demonstrated acceptable fit and reliability values. The effect of method bias was evidenced in the sample and explained one-third of the variance. Inspection of factor loadings, when controlling for method bias, yielded one best-performing item per factor. Findings indicate method bias continues to be problematic for self-report measures such as the SLIM.     

消防工程学课程教学资源利用研究

消防工程学是安全工程专业一门重要的专业基础课程。在教学中,应充分利用校内外有关教学资源,以提高课程的教学质量。     

各类火灾探测器原理分析及应用探讨

火灾探测器能在火灾发生初期,将燃烧物产生的烟雾、热量、火焰等物理量变成电信号传输到火灾报警控制器,是现代消防系统的核心部件。文章通过对各类火灾探测器的工作原理进行分析,并对其应用场合进行探讨,为火灾自动报警系统的设计、施工与运行维护提供参考依据。     

综采面火区治理与回撤的经验探讨

煤层自燃发火已严重影响和制约了煤矿的安全生产,造成不可估计的经济损失,如何有效的治理和控制火区是煤矿安全生产的重要课题,本文主要谈了在治理火区的同时进行工作面回撤的一些经验和做法。     

论电力电缆的安全运行与防火技术

现代城市电网中,电缆应用十分广泛。如果没有针对性的安全运行措施,一旦发生故障,危害极大。文章阐述了电缆着火的原因和特点,防止电缆延燃的措施和扑救方法及日常采取的措施和检查内容。