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4141.弗罗里达大桥桥面与钢梁的缝隙密封问题——概要
[黑色金属冶炼和压延加工业] [2014-03-20]
One of the biggest problems affecting bridges is the transverse cracking and deterioration of concrete bridge decks.This research identifies suitable sealing materials for deck cracks showing their ability to span cracks of various widths and achieving performance criteria such as penetration depth, bond strength to crack walls, elongation, viscosity, penetration, and suitability of the type of sealant.
关键词：钢铁；桥面；密封；裂缝；高分子量丙烯酸甲酯
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4142.自动控制汽车制动淋水降温系统研究
[汽车制造业] [2014-03-20]
With the analysis of vehicle braking drum overheated which has caused brake invalid,this paper put forward a kind of research way to improve the problem of braking drum overheated.Through auto-control it spurts water to lower the temperature to the overheated hub to solve the problem of brake invalid which is caused by braking hub overheated,improve the constancy of braking efficiency,guarantee the security of vehicle drive.
关键词：汽车；鼓式制动器；制动效率；淋水降温；自动控制
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4143.硅钢的磁致伸缩量测的测量方法和样本选择研究
[黑色金属冶炼和压延加工业] [2014-03-20]
Magnetostriction of silicon steel is the main cause of the noise of transformer,while its measuring method is argumentative.It was investigated in this paper the effect of sample size on the measuring stability and reproducibility using laser displacement meter method.It was found that for the sample size 100mm×500mm the measuring stability and repeatability are the best comparing to the size of 30mm×300mm,30mm× 100mm and 60mm× 100mm.For samples with the above for sizes cutting from the same sheet,the magnetostriction of 100mmx500mm size sample is the smallest.
关键词：钢铁；磁致伸缩；硅钢；稳定性
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4144.基于卡尔曼滤波算法的目标车辆运动状态雷达估计方法
[汽车制造业] [2014-03-20]
In this paper,based on Kalman filtering algorithm,a method of target vehicle motion state radar estimation with radar(or lidar) is presented.The state equations is established based on rigid plane dynamics theory,and then with a Kalman filter to do radar data processing,the position,velocity and acceleration of the target vehicle can be estimated at the same time,so that to cover the shortage that acceleration information can not be gained with radar system.Through simulation and field tests it is verified that the detection accuracy of position and velocity of target vehicle is increasing,and the acceleration of target vehicle can be estimated effectively and accurately.
关键词：汽车；雷达；卡尔曼过滤；加速度估计；智能汽车
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4145.汽车氧传感器的新型电解质制备与离子导电机制
[汽车制造业] [2014-03-20]
The ionic conductive behavior of the electrolyte was analyzed on the basis of electrochemical impedance spectroscopy (EIS) test,and the interaction of working temperature,defect microstructure and ionic conductivity was investigated.Accordingly,the SDC displayed an ionic conductivity of 0.029 S cm-1 at 750 ℃.It was suggested that the nano-crystalline could shorten the transfer distance of the charge carriers.Furthermore,the structural change of the polycrystal boundaries with the temperature was a key factor which promoted the oxygen ionic conductivity.
关键词：汽车；氧传感器；离子导电；电化学阻抗谱；钐掺杂氧化铈；
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4146.利用甲烷生产微波氢实验研究
[汽车制造业] [2014-03-20]
The results of this testing program have been very promising, demonstrating the ability to achieve higher methane conversion than onventional methane steam reforming processes. In addition to the higher conversion efficiencies, the microwave reactor system used for the process is more easily scaled to lower gas production volumes than conventional reforming technologies. This makes the technology well suited to generate hydrogen from natural gas for hydrogen fuel cells in the 1 to 20-kW range.
关键词：汽车；氢；甲烷；汽车尾气；碳氢化合物；微波
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4147.蓄电池在线维护设备设计
[汽车制造业,电气机械和器材制造业] [2014-03-20]
In this paper,the sulfation failure mechanism on negative plates of lead-acid batteries and the pulse-repairing technology are analyzed,and an online automatic maintenance device based-on the Boost converter is designed.The test results show that by adjusting the hardware devices and programs the frequency and amplitude of charge-and-discharge pulses can be changed.And when the battery voltage is too low the device can generate sound and light alarm.The device meets the design requirements.
关键词：汽车；铅酸电池；蓄电池；电池维护
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4148.车辆稳定性控制车身偏角观测器设计
[汽车制造业] [2014-03-20]
A novel method based on non-linear robust observer is proposed for estimation body slip angle.Firstly,full-dimension observer designed based on yaw rate and lateral acceleration to estimate lateral velocity.And then,the body slip angle is estimated by using lateral velocity and longitudinal velocity.The proposed m ethod is verified by of fline simulation.The results demonstrate that this method has a better adaptability to different driving conditions and accuracy.
关键词：汽车；车身侧滑角；车辆稳定性控制；观测器
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4149.铝桥面板的发展和配置
[黑色金属冶炼和压延加工业,金属制品业,建筑业] [2014-03-20]
This report contains the analysis and retrofit of a steel truss bridge on KY 974 over Howard Creek in Clark County, Kentucky. The bridge had major corrosion and damage to the steel stringers, along with cracking and leaching occurring in the concrete bridge deck.
关键词：钢铁；铝桥面板；裂化；腐蚀；配置
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4150.转炉脱磷的实证研究
[黑色金属冶炼和压延加工业] [2014-03-20]
The situations of smelting SPHD were analyzed for 150t converter in TangSteel. Based on the analysis of dephosphorization process and the thermodynamic conditions in converter, the operation of dephosphorization was optimized. The industrial tests for dephosphorization were carried out, and the results were analyzed. The results were shown that the distribution coefficient would be the highest value, when the alkalinity of slag was 3.5 and the FeO content was 21％ in making SPHD steel. The distribution coefficient would reduce, when the temperature was increased, especially more than 1700℃, so end point temperature should be best less than 1700℃.
关键词：钢铁；脱磷；转炉；热力学
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