一种基于ARM的蓄电池参数检测模块

本文介绍一种以智能传感器和CAN总线为核心的智能化铅酸蓄电池参数检测的设计思想和方法。该模块能对单块蓄电池电压、温度、密度进行检测,并对液位进行上、下限报警。该模块由于使用了数字化技术及CAN总线技术,不但降低了成本,还提高了模块的实时性、可靠性和灵活性。     

内昆铁路老官寨浅埋黏土孤石隧道施工预控和监控量测

针对内昆铁路老官寨粘土孤石隧道围岩特点,采用施工预控和监控量测,从而保证了隧道的支护稳定和施工安全。     

电力机车过分相电弧放电现象的研究与探讨

在我国高速电气化铁道运行中,多次发现电力机车通过关节式电分相时产生电弧放电现象,笔者采用空气击穿放电理论,根据接触网关节式电分相的结构以及机车过电分相的过程,对该放电现象的成因进行了理论分析.     

基于NetFlow流量分析的网络蠕虫检测算法

网络蠕虫是网络安全中的一个重要议题,为了及时检测网络蠕虫,本文基于NetFlow协议提出了一种网络蠕虫的检测算法。该文介绍了NetFlow数据报的格式,提供了常见蠕虫病毒的NetFlow数据报的特征。统计了待检测网络流量特征,将此流量特征与正常网络流量特征进行对比,判断网络中是否存在蠕虫病毒。测试结果表明,该算法能够有效地检测网络蠕虫病毒。     

基于元数据管理的数据共享研究

以实现空间数据的标准化为目的，实现数据的共享为前提，指出传统的数据共享模式存在着弊端，需要建立基于元数据管理的共享机制，同时提出了元数据管理的策略，这对于解决数据共享中的异地异构存储是有借鉴意义的，这一思想可以在数字山东的数据共享中得以实施和应用。     

Human machine collaborative support scheduling system of intelligence information from multiple unmanned aerial vehicles based on eye tracker

Many human-machine collaborative support scheduling systems are used to aid human decision making by providing several optimal scheduling algorithms that do not take operator’s attention into consideration. However, the current systems should take advantage of the operator’s attention to obtain the optimal solution. In this paper, we innovatively propose a human-machine collaborative support scheduling system of intelligence information from multi-UAVs based on eye-tracker. Firstly, the target recognition algorithm is applied to the images from the multiple unmanned aerial vehicles (multi-UAVs) to recognize the targets in the images. Then, the support system utilizes the eye tracker to gain the eye-gaze points which are intended to obtain the focused targets in the images. Finally, the heuristic scheduling algorithms take both the attributes of targets and the operator’s attention into consideration to obtain the sequence of the images. As the processing time of the images collected by the multi-UAVs is uncertain, however the upper bounds and lower bounds of the processing time are known before. So the processing time of the images is modeled by the interval processing time. The objective of the scheduling problem is to minimize mean weighted completion time. This paper proposes some new polynomial time heuristic scheduling algorithms which firstly schedule the images including the focused targets. We conduct the scheduling experiments under six different distributions. The results indicate that the proposed algorithm is not sensitive to the different distributions of the processing time and has a negligible computational time. The absolute error of the best performing heuristic solution is only about 1%. Then, we incorporate the best performing heuristic algorithm into the human-machine collaborative support systems to verify the performance of the system.     

Optimization of the Construction Scheme for a PBA Metro Station Adjacent to an Existing Metro Tunnel北大核心CSCD

The Olympic Park Station crossing the existing Datun-Road tunnel covers a long distance and closely approaches an existing metro tunnel. Initially, the PBA construction method was adopted with eight pilot tunnels. In light of the tunnel group cavern effect and the surrounding soft silty clay with abundant water, the construction risks were very. Optimization of the metro station construction scheme was conducted, and the four pilot tunnels at the downside were cancelled and replaced with long drill hole grouting piles. Construction technology for a large-diame-ter pile for a bored pilot tunnel was adopted based on the engineering characters of the PBA method using four pilot tunnels. Monitoring on the Datunlu tunnel structure was performed during metro station construction and the results indicate that the construction scheme for the station’s main structure was rational; the new construction technology ensures construction safety for the existing tunnel and metro structure. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved.     

钢管桩支护法明挖基坑施工方法简介

介绍钢管桩支护法进行明挖基坑的特点、施工方法以及其技术保证措施.     

摩托车发动机齿轮脱档和异响问题的分析与解决

对退回的有问题齿轮进行分类分析,齿轮脱档主要原因是副2档齿轮的3个爪不等分,当摩托车爬坡时,会使3个爪承受轴向推力而脱档;齿轮异响主要原因是齿轮精度问题。通过改进工艺及质量控制,使这些问题得到了解决,质量成本进一步下降。     

基于移动代理技术的列车故障诊断

车辆的故障诊断是保证城市轨道交通安全运营的重要措施。介绍目前常见的离线诊断模式和在线诊断模式,比较了它们的特点,并指出其存在的缺陷。研究了基于移动代理技术的列车故障诊断模式,分析了移动代理技术在城市轨道交通列车故障诊断应用中的适应性,以及与现有的故障诊断方式相比所具有的优点。提出了基于移动代理技术的列车故障诊断机制,构建了基于移动代理技术的列车故障诊断参考模型。