马钢姑山矿业公司钟山排土场复垦效果分析

为掌握马钢姑山矿业公司钟山排土场的复垦效果,对该排土场复垦前的地表土壤、盆栽试验基质、复垦后的地表土壤及所栽种植物进行了营养元素含量及重金属含量的检测分析。结果表明：钟山排土场复垦土地中速效氮含量偏低,后续复垦工作中应增加氮肥的施用量或广泛种植固氮植物;钟山排土场原地表物质重金属含量超标,虽然在原地表覆盖客土能使植物较好地生长,但随着复垦年限的增长,复垦土地产出的农产品由于重金属的迁移作用,其重金属含量超过了相关国家标准的要求,因此后续复垦工作中应着重解决重金属迁移的问题。     

鞍千矿排石（土）场土石复杂边坡可靠性分析

鞍千矿排石（土）场形成的坡体与一般的边坡不同,坡体形态复杂,碎石与土混杂,且分布不均匀,土体的参数重度、内聚力和内摩擦角在空间上变异较大,并且坡体有软弱层面存在。通过实验、现场统计等方式研究这些参数,发现它们基本满足正态分布,并给出了概率统计特性和概率分布。用Bishop方法分别计算3类稳定系数,既无条件最小稳定系数、滑动块体达到一定规模的最小稳定系数（危害性大）和滑动面通过软弱面的稳定系数,通过蒙特卡洛法得到了这些稳定系数的概率分布。分别计算了排石（土）场有代表性3个剖面的3个类型稳定系数的概率分布函数,进行了可靠性分析,并给出了预警等级。     

An analysis of driving and working hour on commercial motor vehicle driver safety using naturalistic data collection

Current hours-of-service (HOS) regulations prescribe limits to commercial motor vehicle (CMV) drivers’ operating hours. By using naturalistic-data-collection, researchers were able to assess activities performed in the 14-h workday and the relationship between safety-critical events (SCEs) and driving hours, work hours, and breaks. The data used in the analyses were collected in the Naturalistic Truck Driving Study and included 97 drivers and about 735,000 miles of continuous driving data. An assessment of the drivers’ workday determined that, on average, drivers spent 66% of their shift driving, 23% in non-driving work, and 11% resting. Analyses evaluating the relationship between driving hours (i.e., driving only) and SCE risk found a time-on-task effect across hours, with no significant difference in safety outcomes between 11th driving hour and driving hours 8, 9 or 10. Analyses on work hours (i.e., driving in addition to non-driving work) found that risk of being involved in an SCE generally increased as work hours increased. This suggests that time-on-task effects may not be related to driving hours alone, but implies an interaction between driving hours and work hours: if a driver begins the day with several hours of non-driving work, followed by driving that goes deep into the 14-h workday, SCE risk was found to increase. Breaks from driving were found to be beneficial in reducing SCEs (during 1-h window after a break) and were effective in counteracting the negative effects of time-on-task.     

物流运输中卡车预测系统设计

采用曲线拟合,最小二乘法的理论方法,并利用JSP技术实现对现今日趋增长的物流配送行业中关于每天卡车预定量进行统计和分析,从而描绘出卡车预定量发展走势图,进而实现对每天卡车需要量的预测,开发出符合公司物流运输业务的完整预测系统,已达到更加精准的对货物体积和车辆需求的预测评估工作。     

The consequences of an increase in heavy goods vehicles for passenger car drivers' mental workload and behaviour: a simulator study

The effects of an increase in Heavy Goods Vehicles (HGVs) on merging behaviour and on mental workload of motorists during filtering in and out of traffic were studied. Participants drove in a driving simulator in a total of 12 conditions; twice in each of two weather conditions and in three traffic conditions. The weather conditions were clear weather and foggy weather. The traffic conditions were without HGVs (i.e. only private cars), the current mix of HGVs and private cars, and a condition with a 70% increase of HGVs leading to an HGV column in the slow lane. The focus of the study was on assessing effects on behaviour and mental workload during filtering into traffic, and during exiting from the motorway. During the experiment driving performance was registered, behaviour was observed, self reports were collected, and the participant's heart rate was recorded. The results showed that directly after filtering into traffic the variation in driving speed increased and the minimum time headway decreased with an increase in the proportion of HGVs. Joining motorway traffic was considered to involve greater effort and risk in the condition with a column of HGVs. The effects of the conditions on heart rate are less clear, although the moment when the participants joined the traffic is clearly visible. The effects of weather conditions were limited, drivers adapting their driving behaviour in adverse weather by reducing speed. To exit the motorway is not a difficult manoeuvre. For that reason the lane change from the left hand to the right hand lane that preceded the exit was analysed. Although increased mental effort was reported and the lane change was visible in the heart rate record, no critical changes as a result of increase in proportion of HGVs were found for this manoeuvre. However, in the condition with a column of HGVs, the exit that had to be taken was most frequently missed as HGVs obstructed the view of the exit signs. It is concluded that an increase in HGVs will make merging into traffic more mentally demanding and will decrease safety margins.     

分体式车厢三向卸货自卸车稳定性研究

自卸车举升、翻转、倾卸物料时整车稳定性将会降低,特别是重型自卸车,其车厢很长,刚度低,卸货时车架、车厢可能产生严重扭曲,甚至引发整车倾翻事故,造成人员伤亡和财产损失.为提高车厢的刚度,增加自卸车举升卸货时的稳定性,将车厢设计成分体式,实现三向卸货,并对多种卸货方式进行稳定性计算.通过对分体式车厢与整体式车厢实例进行稳定性计算比较,说明分体式车厢的设计是科学和实用的.     

劫持Linux系统调用封杀Core Dump漏洞攻击

Core Dump漏洞影响kernal2.6.13-2.6.17.3的多款Linux操作系统,它可以引发拒绝服务攻击和本地权限提升攻击,危害巨大。恶意进程使用prctl系统调用,通过故意制造Core Dump,可以旁路操作系统安全控制,攻击系统。通过劫持prctl系统调用,对发起系统调用的进程进行行为监视,进而检测攻击,可以有效地阻止和防御攻击的发生。把防御程序编译为可动态插入内核的模块,能在多款受影响的系统上稳定高效地运行。     

矿山主提升带式输送机的软起动设计

矿山主提升带式输送机都具有输送量大、提升高度大和装机功率大的特点,其起制动设计是设计者经常遇到的难题,本文详细论述了这类带式输送机的载荷特点以及对软起动系统的基本要求,给出了起动参数的判断原则,并给合工程应用介绍了软起动系统的设计方法。     

便携式智能化动态汽车秤设计

本设计运用红外装置检测和单征机控制相配合,对行驶状态下的汽车进行动态称量。由于采用了新的检测办法和新的数据采集办法及较精确的数据处理方法,使设计的动态汽车秤具有较高的准确性和使用的方便性。此秤不仅能显示车重,而且能称量货重,判别是否超载,打印称量结果和迁移方便等功能。     

油罐汽车承包后应强化安全管理

油罐汽车是否公司运输汪品的专用工具,在油罐汽车承包后不能放任彼注,更应强化安全管理,保证国家财产不受损失,使的工作正常运转。