用因素分析理论进行铁路局货运清算收入分析的研究

根据现行铁路运输进款清算办法,给出铁路局货运清算收入的计算方法,分析货物周转量、发送量、装车数等铁路运营指标与铁路局货运清算收入的数学关系。应用微积分方法推导出指标因素影响分析的通用计算公式。利用指标因素影响分析通用计算公式,推导出铁路运营指标对铁路局货运清算收入影响的分析计算公式,并给出计算实例。     

浅析高速公路突发公共事件应急保障体系建设

文章针对当前高速公路突发应急公共事件应急保障体系的现状,分析高速公路突发公共应急事件产生的原因,结合高速公路突发公共应急事件的特点,提出建设高速公路应急管理体系的原则和构想。     

SLHB—8型沥青混合料拌和机的使用特点

贵州省都匀福泉公路管理段于 1998年 5月购置了一套泉州产 8t级沥青拌和机 ,从使用 2年的情况来看 ,具有“一快、二高、三降低”和灵活性的特点。1　加快工程进度1998年我段自己完善的大修工程达 14.3km,按照人工炒砂拌和罩面 ,每公里路需要的时间为 8～ 9天(有效路面宽度 7m) ,那么 14.3km用 2个作业点也需要 2个多月才能完成。用拌和机拌和每公里只需 3.5天时间就能完成 ,这样 14.3km只需 4 0多天就能完成 ,有效地加快了工程进度 ,保证了工程的竣工日期。2　提高工程质量及生产效益2 .1　提高工程质量与提高大修罩面工程质量相关的几个要…     

稳定土拌和机的合理选用

较全面地阐述了稳定土拌和机的分类，特性及其发展方向，提出了影响拌和作业的主要因素及实际作业中应注意的问题。     

连续式振动搅拌装置的试验研究

介绍了一种连续式振动搅拌装置的结构与工作原理，并对该装置在稳定土和水泥混凝土的匀质性及强度以及功率与噪声等搅拌性能方面进行了测试，给出测试结果。     

Non-discriminatory train dispatching in a rail transport market with multiple competing and collaborative train operating companies

Train dispatching is vital for the punctuality of train services, which is critical for a train operating company (TOC) to maintain its competitiveness. Due to the introduction of competition in the railway transport market, the issue of discrimination is attracting more and more attention. This paper focuses on delivering non-discriminatory train dispatching solutions while multiple TOCs are competing in a rail transport market, and investigating impacting factors of the inequity of train dispatching solutions. A mixed integer linear programming (MILP) model is first proposed, in which the inequity of competitors (i.e., trains and TOCs) is formalized by a set of constraints. In order to provide a more flexible framework, a model is further reformulated where the inequity of competitors is formalized as the maximum individual deviation of competitors’ delay cost from average delay cost in the objective function. Complex infrastructure capacity constraints are considered and modelled through a big M-based approach. The proposed models are solved by a standard MILP solver. A set of comprehensive experiments is conducted on a real-world dataset adapted from the Dutch railway network to test the efficiency, effectiveness, and applicability of the proposed models, as well as determine the trade-off between train delays and delay equity.     

城市公交项目经济评价中的运营成本估算方法

本文从分析城市公交运营成本的构成出发,探索运用不同的公交运营指标分别计量各类运营成本的途径,并以一个简化的快速公交项目为实例,介绍了项目运营成本的估算方法和步骤,对可行性研究阶段的城市公交项目的经济评价工作具有一定的借鉴意义。     

Screening of Bioflocculant-Producing Strains and Characteristics of Microbial Flocculation

A high effective bioflocculant-producing strain named LB1 was isolated and screened from the leachate by routine micro-method. The strain was identified as genus Pseudomonas according to the morphologic and physiological-biochemical characteristics of the strain. The biological characteristics of the microbial flocculants produced by LB1 were investigated. The results show that the optimal production period of microbial flocculant using LB1 is 96 h; and the products, found in the fermentation liquor, comprise the extracellular organic matter (EOM) of LB1 generated during LB1 growth and the secondary metabolites in the anaphase of LB1. Meanwhile, the mycelia can improve the performance of the microbial flocculants. Because heat has a greater influence on the active substance in the microbial flocculants than other factors, the activity of the flocculants decreases with increasing temperature and the time of heating. The flocculants can flocculate mud-containing and melanin-containing wastewater effectively with a flocculation ratio of 85.1% and 92. 2% , respectively. The optimal heating temperature varies from 20 to 45 ℃. When flocculating the two wastewater, the flocculating activity of the flocculants is above 57. 7% and 70.9% , respectively, in a wide pH range from 3 to 11.     

武汉局集团公司快运货物班列运营策略探讨

快运货物班列作为铁路货运的新产品,自开行以来以其提高货运资源利用率,有效带动周边区域经济得到全社会的广泛赞誉。为加快推进铁路货运市场化改革,进一步提升快运货物班列的市场竞争力,以武汉局集团公司为例,在阐述快运货物班列运输的现状的基础上,对目前存在的问题进行深入分析,结合武汉局集团公司快运货运班列运营特色,针对目前武汉局集团公司快运货物班列存在的问题,探讨快运货物班列运营策略,为快运货物班列产品有效打入货运市场,提升铁路货运竞争力提供决策参考。     

鸥翼门人机设计要点

为了提高鸥翼门设计的可操作性,文章针对鸥翼门人机设计,进行了要点方法、设计参数及工程要求等的分析。应用车身基础结构断面、SAE定义模型及RAMSIS假人等工具,结合实例,对L38,H47-1H35-1／27-1,35—1,H5,H11H30,H40,L18及车门开启角度等具体设计参数的确定方法进行了说明。给出具体设计步骤及设计要点,根据一些特殊的问题情况给出零部件设计建议,研究结果表明,鸥翼门人机设计需重点关注合理的头部空间;车门开启宽度应结合车门使用空间;人员进出方便性设计及门槛高度设计需综合考虑布置空间、车高和人机设计等因素．、