露天采矿机受损因素分析

露天采矿机作为一种连续采掘设备,集穿、爆、采于一体,在露天矿煤层选采以及煤层间夹矸处理方面得到广泛应用。分析露影响露天采矿机受损的3方面因素对于天采矿机的安全生产乃至对整个矿山稳定性以及保证矿山推进度有重要作用。从现场实际出发,总结影响露天采矿机受损的3方面因素,包括人员因素、设备因素、环境因素;进而对3方面的因素进行具体分析。在此基础上,建立层次分析模型,通过MATLAB编程对结果进行计算,并进行一致性检验,最终得出各受损因素的总体优先级排序。计算结果表明,人员马虎作业、违背操作规程和业务素质低为权重值前3位因素,且三者相加的权重超出整体权重的一半。针对受损原因提出5条整改意见。结论对相似矿山条件下露天采矿机的使用具有参考价值。

额济纳绿洲生态环境的历史演变及其受损因素分析

额济纳平原广大的戈壁滩植被极为稀少,绿洲主要分布在东、西两河的沿河地带以及古日乃湖盆地区,典型的干旱荒漠气候及地质地貌条件是额济纳平原绿洲生态环境退化的动力条件和物质基础。人为的破坏自然植被,减少河流来水量,是额济纳平原环境退化的根本原因。自本世纪六十年代以来,由于黑河进入额济纳平原区水量的不断减少,导致西居延海、东居延海相继干涸,绿洲面积不断减少,植被退化严重,从而引起生态环境的日趋恶化,产生和加剧了一系列的生态环境问题。概括起来,额济纳平原绿洲生态环境问题主要是:湿地减少、植被退化、土壤盐渍化以及土地沙化和荒漠化等。

基于层次分析法的露天矿用卡车受损因素研究

单斗—卡车间断工艺是目前我国露天矿应用较为广泛的一种生产工艺,卡车运输是工艺中的重要一环,卡车作为运输环节的关键设备,其完好与否决定了整个工艺能否顺利进行。文章结合层次分析的方法,遵从"人—机—环境"的思路进行系统分析,找出导致卡车受损的若干关键点,并相应提出问题的解决方案,确保矿区生产工作的顺利进行。

ICU医护人员心理健康受损的因素和预防措施

随着现代医学观念的进步,以及医院服务理念的更新,为了最大限度的挽救生命,考虑到患者的需求,我国许多医院都引进了先进的医疗设备,设置了重症医学科(intensive careunit,ICU)。ICU是一个为重病人聚集,病情多变,先进医疗仪器集中的地方,这对ICU医护人员提出了很高的要求,作为一名ICU医护uoduo人员除了具备丰富的专业知识。

湿地生态效益补偿中湿地受损情况分析

对因鸟类等野生动物保护造成的湿地受损进行界定是做好湿地生态效益补偿的基本要求。本文以黄河三角洲国家级自然保护区湿地受损为例,从鸟类生存需要食物来源,分析了湿地受损原因及对不同生境的影响;根据鸟类的活动分布特点,划分了鸟类集中区、鸟类觅食区和鸟类扩散区3种类型,说明了3种类型的特点;从鸟类觅食直接导致经济损失、鸟类利用生境的不同方式导致产量降低、管理方式不同导致耕地受损差异分析了湿地受损原因。

高速公路桥梁伸缩缝疲劳破坏机理分析及快速修复技术探究

伸缩缝是高速公路桥梁结构中不可或缺的一部分,它的完好性对于确保桥梁结构的稳定性和管道的安全性至关重要。然而,在高速公路桥梁运行期间,伸缩缝会在各方面因素的作用下遭受损害。若不能及时修复或更换,不仅会车辆行驶的安全性和舒适性造成影响,还会对我国国民经济发展造成一定的影响。因此,详细分析高速公路桥梁伸缩缝受损的原因及快速修复技术对于我国交通基础设施的可持续发展具有重要意义。

Damage or Recovery?Assessing Ecological Land Change and Its Driving Factors:A Case of the Yangtze River Economic Belt,China

Ecological land can provide people with ecological products and ecological services;and it plays an important role in maintaining the health and safety of the ecosystem.With China’s rapid urbanization development,ecological land has been invaded in large quantities,and damaged seriously,even resulting in loses of its ecological function.Based on land use data from 1995 to 2015,our study explores the spatial and temporal evolution of the damage or recovery of ecological land in the Yangtze River Economic Belt(YREB).Two spatial models,geographic detector and geographic weighted regression(GWR),were employed to assess the global effects and the local effects of the driving factors for ecological land change,respectively.Our study divided the ecological land change into five types based on the degree of change as severe damage,slight damage,unchanged,slight recovery,and obvious recovery.The results show that from 1995 to 2015,the total area of ecological land in the YREB increased initially and then decreased,but the overall trend was decreasing.The total damaged area was larger than the recovered area.Arable land and woodland both showed downward trends.In terms of ecological land change over the past 20 years,the type of unchanged had the largest area,followed by slight damage and slight recovery.Our study further revealed that ecological land change was the net result of the interaction of many factors,and the explanatory power between any two driving factors was greater than that of any individual driving factor.In addition,driving factors have different impacts on ecological land change in different geographical locations.This knowledge should help land managers and policymakers to be better informed when developing pertinent land use policies at the regional and local levels.The lessons can also be extended to other regions for better management of their ecological land for sustainable use.