登录

  • 登录
  • 忘记密码?点击找回

注册

  • 获取手机验证码 60
  • 注册

找回密码

  • 获取手机验证码60
  • 找回

    找到约2658个结果。

    退役动力电池快速余能检测与梯次利用研究开题报告

    1. 研究目的与意义(文献综述) With the rapid development of global technology and society, energy and environmental protection have become the most concerned issues in the 21st century.Because of the overexploitation and utilization of oil resources by human beings in the past 200 years, if the oil continues to be extracted and consumed at this rate, the world's oil resources will be exhausted in less than 50 years.Therefore, in recent years, many countries have taken the development of new energy vehicles as a very important work.Take a look at China,since the launch of the "ten cities per thousand" project in 2009, China's electric vehicle industry has been developing rapidly with the strong support of the Chinese government.The production of pure electric vehicles is expected to exceed 2 million in 2020. However, as the core of electric vehicles, power battery.Its performance has a very big impact on electric vehicles.However, in modern society, compared with the recyc

    某新能源车型前制动器设计(参照奇瑞eQ1)开题报告

    1. 研究目的与意义(文献综述) 1. Purpose and significance (including analysis of research status at home and abroad) 1.1 Purpose and significance The brake system is one of the most important systems on the car. It allows the outside world (mainly the road surface) to exert a certain force on certain parts of the car (mainly the wheels), thus forcing the car to a certain degree. The function of the braking system is to enable the running car to be forced to decelerate or even stop according to the driver's intention; or to enable the stopped car to be stably parked under various road conditions (such as on a ramp); The speed of the car on the slope remains stable. The braking effect on the car can only be the external force acting on the car and the direction opposite to the direction of the car. The magnitude of these external forces is random and uncontrollable. Therefore, the car must be equipped with a set to control and adjust. Brake system of braking force to ach

    ABS控制器下线服务系统设计与开发开题报告

    1. 研究目的与意义(文献综述) 研究目的: 为解决国内气压ABS控制器产品专用测试系统存在的自动化程度低和测试不稳定的问题,提出一种气压ABS控制器产品的下线测试方法,并针对某型气压ABS控制器产品设计一种专用下线测试系统。 研究意义: 气压ABS的主要组成部件包括轮速传感器、电磁阀、控制器,其中轮速传感器与电磁阀的性能在出厂时已经过专用测试设备的验证。控制器作为气压ABS系统的核心控制单元,在控制器产品下线阶段必须验证其功能是否合格。国内外针对气压ABS的测试主要有三种方法:实车试验、台架混合仿真试验和硬件在环试验。其中实车试验虽然试验效果最好,但是试验周期长、成本高、重复性差,测试过程中,影响测试结果的因素较多并很难把握,所以试验参数不可控;台架混合仿真试验能很好的测试系统的性能,在国

    电动汽车转向系统设计开题报告

    1. 研究目的与意义(文献综述) The car steering system is an important component of the car. It is a very important safety device to ensure the safe driving of the car. Its function is to control the driving direction of the car according to the driver's intention. It directly affects the overall maneuverability and driving stability of the car. In the history of automobile development, the steering system has gone through four stages, they are: Manual Steering (MS), Hydraulic Power Steering (HPS), and Electric Hydraulic Power Steering Power Steering (EHPS) and Electric Power Steering (EPS)[18]. The first application of electric power steering was in Japan. In February 1988, Japan's Suzuki Motor Company first applied the EPS system to Cervo mini cars[1], and later also used it on Alto cars. After that, EPS technology has been favored by major car manufacturers and has been innovated and improved step by step. In 1993, Honda Motors of Japan installed EPS on the premium sport

    电动小巴车车桥设计及可靠性分析开题报告

    全文总字数:12651字1. 研究目的与意义(文献综述) Ⅰ. Purpose and meaning An automobile axle (also called an axle) is connected to a frame (or a load-bearing body) through a suspension, and wheels are installed at both ends thereof.The role of the axle is to bear the load of the car and maintain the normal driving of the car on the road.According to different driving methods, the axle is also divided into four types: steering axle, drive axle, steering axle and support axle. As environmental pollution and the energy crisis have attracted widespread attention, the development of the automotive industry has also shifted from traditional fuel vehicles to clean energy vehicles.Pure electric vehicles have the advantages of zero pollution and low noise, and have long-term development prospects.With the widespread use of electric vehicles, people have put forward higher requirements for the use of electric vehicles.At the same time, in the process of technology research a

    某新能源车型前制动器设计(参照奇瑞eQ1)开题报告

    全文总字数:12571字1. 研究目的与意义(文献综述) 1. Purpose and significance (including analysis of research status at home and abroad) 1.1 Purpose and significance The brake system is one of the most important systems on the car. It allows the outside world (mainly the road surface) to exert a certain force on certain parts of the car (mainly the wheels), thus forcing the car to a certain degree. The function of the braking system is to enable the running car to be forced to decelerate or even stop according to the driver's intention; or to enable the stopped car to be stably parked under various road conditions (such as on a ramp); The speed of the car on the slope remains stable. The braking effect on the car can only be the external force acting on the car and the direction opposite to the direction of the car. The magnitude of these external forces is random and uncontrollable. Therefore, the car must be equipped with a set to control and adjust. Brake syst

    乳制品数据融合鉴别分析研究开题报告

    1. 研究目的与意义牛奶制品有很丰富的营养,蛋白质的含量很高,尤其是经发酵的牛奶制品,经过发酵后蛋白质进行一定程度的降解更容易消化吸收。随着经济的发展牛奶制品的需求越来越高,随之而来的牛奶制品的相关问题也越来越多,从三鹿奶粉问题出现之后,蒙牛、伊利、光明这些牛奶行业的巨头也纷纷被曝出问题。改革开放以后中国市场上对牛奶制品的需求急速上升,相关问题被曝出之后,很多消费者放弃了国内制造的牛奶制品,转向国外的产品。中国奶制品质量问题近5年一直在中国十大最令人担心的问题前几位,中国牛奶制品质量的提升是必须要实现的。数据融合技术是指利用计算机对按时序获得的若干观测信息,在一定准则下加以自动分析、综合,以完成所需的决策和评估任务而进行的信息处理技术。数据融合分析技术运用到牛奶制

    LU201701对慢性轻度应激抑郁模型的治疗作用开题报告

    1. 研究目的与意义一、毕业设计内容抑郁症是以情绪低落、乐趣丧失为主要表现的一组精神障碍性疾病。目前抑郁症的基础和临床研究非常重要,其中抑郁症动物模型是研究抑郁症发病机制及抗抑郁药物研究的关键。慢性轻度应激(Chronic mild stress,CMS)抑郁症动物模型有着很好的表面效度、预测效度和理论建构效度,因此常用于抑郁症发病机制的研究。LU201701主要功效为:补肝宁心,益气安神,清热除烦,祛痰通络;用于心胆气虚所致的抑郁症。症见情绪不宁,胆怯恐惧,心中剔剔不安,自卑绝望,难以决断。或伴烦躁善哭,失眠多梦,易于惊醒,心悸气短,咽中异物感,倦怠,面色晄白,舌质淡,苔薄白,脉沉细或细弱无力。这些症状与西医抑郁症临床表现一致。针对本方中补肝宁心,益气安神的功效,拟采用慢性轻度应激抑郁症模型针对性的进

    自动互异组卷算法的研究与设计开题报告

    1. 研究目的与意义(文献综述) 自21世纪以来,计算机在各方面的应用越来越广,自然也蔓延到教育领域,在教育领域中,考试是整个教学过程中的重要环节,它既可以检测学生对所学知识的掌握情况,也可以衡量教师教学效果得优劣,方便于学生和老师在考后进行对自身的调整。传统考试一直采用人工出题方式,众多学校在试题排版、印刷等过程中用了大量的时间和资源。手工方式出题,由于没有统一的科学命题要求和试题各项技术指标,因此同一学科的考试,在班级之间,学校之间,或同一学校的考试,在不同年度之间缺乏可比性,不利于检查和评估教学质量和学生的学习情况,同时,由于缺乏大量试题作参考,教师只能靠个人的经验与知识的积累来命题,另外不同教师出题风格不同,评分标准和评分方法也不同,命题带有较大的主观性,不

    纯电动四驱乘用车悬架设计开题报告

    全文总字数:10360字1. 研究目的与意义(文献综述) In today's world,the shortage of fossil resources and the problem of environmental pollution arebecoming more serious. These problems are forcing the automotive industry totransform and move towards efficient, green and clean. At this time, the developmentof pure electric vehicles is the right thing to do. The development of pureelectric vehicles can reduce China's dependence on oil, use more coal toprotect the country's energy security; move towards pure electricity, use thenew energy revolution to end the technological advantages of developedcountries, and achieve curve overtaking. As early as themid-19th century, in 1881, the first electric car using lead-acid batteriesappeared; in the early 20th century, the development of internal combustion enginesbrought pure electric vehicles out of the market; in the 1960s, the oil crisiscaused people to re-emphasize pure electric vehicles. Automobiles; in the1990s, batt

联系我们

加微信咨询

加QQ咨询

服务时间:09:00-23:50(周一至周日)

企业微信

Copyright © 2010-2022 毕业论文网 站点地图