浅析汽车维修新技术中发动机故障检测及维修技术

随着我国社会发展进步,汽车已经成为人民生活中不可或缺的一部分,而汽车运行过程中难免会发生故障,其中发动机故障的影响尤为严重。从简述汽车维修新技术的重要作用入手,进一步分析汽车发动机故障的检测方法,探究汽车维修新技术在发动机异响、发动机油样、发动机启停及发动机冷却系统故障检测和维修的途径。     

反坡斜井突涌水施工技术

通过对锦屏山隧道辅引3#施工支洞反坡施工,介绍反坡斜井突涌水条件下施工技术,根据实例论述了以防为主、防排结合的反坡斜井突涌水隧道施工方法.     

Preparation of recombinant firefly luciferase by a simple and rapid expression and purification method and its application in bacterial detection

A simple and rapid expression and purification method of recombinant firefly luciferase was developed for bacteria detection. A modified luciferase gene from North American firefly Photinus pyralis was cloned into pET28a expression vector and the recombinant protein was produced in Escherichia coli BL21. The recombinant luciferase, equipped with a polyhistidine affinity tag, was purified by immobilized metal ion affinity chromatography (IMAC). The approach generated an abundant expression and an efficient purification of a recombinant luciferase with final yield 1.995mg/L of cell culture. Experiments on the recombinant luciferase also showed that the relative light units (RUL) of the enzyme were 5.8×108, and the specific activity was 2.9×1010 RLU/mg. By applying adenosine triphosphate (ATP) bioluminescence to detection of the coin bacteria using the recombinant protein, the ATP content of bacteria was 9.48×10-16mol/mL, and was identical to the bacteria counts (4500CFU/mL) in order of magnitude. Taken together, our results provided a simple and efficacious method of the preparation of recombinant luciferase, which could be applied in the determination of bacteria via ATP bioluminescence.     

图像边界检测区域对比度模糊增强算法在轮廓提取中的运用

分析了图像边界检测的区域对比度模糊增强算法的特点，通过实验验证了该算法的正确性和可行性，并指出了算法的一些不足之处和待改进的地方，提出了一种适用轮廓提取的新广义算子。     

汽车维修中检测诊断技术的应用探讨

现如今汽车已经成为人们必不可少的代步工具,汽车的数量随之也越来越多,在汽车的行驶过程中,难免会出现故障之类的问题,因此汽车的维修工作也变的尤为重要,其维修的师傅必须具备丰富的工作经验以及理论知识,然后借助检测诊断技术来进行汽车的事故和问题故障的检测排查工作。本文围绕汽车的检测诊断技术以及该技术在汽车维修中的应用展开分析。     

Efficient multiple model particle filtering for joint traffic state estimation and incident detection

This article proposes an efficient multiple model particle filter (EMMPF) to solve the problems of traffic state estimation and incident detection, which requires significantly less computation time compared to existing multiple model nonlinear filters. To incorporate the on ramps and off ramps on the highway, junction solvers for a traffic flow model with incident dynamics are developed. The effectiveness of the proposed EMMPF is assessed using a benchmark hybrid state estimation problem, and using synthetic traffic data generated by a micro-simulation software. Then, the traffic estimation framework is implemented using field data collected on Interstate 880 in California. The results show the EMMPF is capable of estimating the traffic state and detecting incidents and requires an order of magnitude less computation time compared to existing algorithms, especially when the hybrid system has a large number of rare models.     

主动声纳的低截获性数字仿真研究

在现代海战中,舰艇面临着越来越严峻的敌方侦察声纳的威胁.低截获是一项非常诱人的技术.低截获声纳通过选择合适的发射信号,在保持探测能力的同时,降低被敌方侦察声纳截获的概率.采用数字仿真的形式,分析浅海侦察声纳信号能量的变化,研究主动声纳的低截获性.仿真结果表明在高斯噪声背景下,主动声纳实现低截获性相当困难.     

交通运输超限治理对策研究

由于交通运输量的不断增大以及运输行业的恶性竞争等原因，导致货车超载现象越来越普遍，并已成为急需解决的问题。探讨交通运输超限治理的对策，对于完善科学而系统的超限管理体系具有一定的借鉴意义。     

汽车自动变速器检测台的开发研究

介绍了一种可对汽车自动变速器性能进行全面测试的检测台，论述了其结构组成、功能特点和推广应用价值。     

城市轨道交通车载列车自动防护设备仿真检测平台研究

仿真测试是开展城市轨道交通信号系统相关技术研究的一种有效方法。利用商业虚拟仪器开发平台LabVIEW,讨论了车载ATP(列车自动防护)设备仿真检测系统研制的技术和方法。实践证明,该车载ATP设备仿真检测平台具有高效、灵活、低成本的特点。