全文总字数：13928字1. 研究目的与意义（文献综述） 1.Purpose and Significance This design aims to design a set of data collection systembased on Baja racing, which can realize the data collection, transmission,storage and display of driving data. Baja SAE China (BSC for short) is an off-road vehicle design,manufacturing and testing competition for undergraduate and vocational collegestudents in automotive and related majors, which is organized by China Societyof Automotive Engineering. In accordance with the race rules and race carmanufacturing standards, each participating team uses the same type of engineto design and manufacture a single-seat, mid-engine and rear-drive smalloff-road vehicle within a specified period of time to complete static item anddynamic item competitions. Static items include technical inspection, racingcar design, cost and manufacturing, business marketing, etc. Dynamic eventsinclude one-way races such as traction test, control test, hill cli

全文总字数：4550字1. 研究目的与意义（文献综述） 自从1977年我国恢复高考制度以来，我国的高考制度在这40年间不断地革新完善，形成了一套具有中国特色的高考制度，这套制度为国家为社会不断的提供一批又一批优秀的高级知识人才，推动了社会的进步，同时也让许多贫困地区的人能够改变自己的命运。 无可否认，我国的高考制度是一套行之有效的制度，但是我们应该清楚的看到，在高考选拔过程中出现了一系列不公平现象，遭到了社会上许多人士的批判，如同卷不同分、地区歧视、地区名额分配不均等，其中分省定额招生是其中最典型的代表。 我国高考的招生配额制度大致经历了三个时期，配额权上收、大行政区配额和分省配额制。其中分省配额制是自1977年恢复高考以来一直沿用的制度。设立分省配额制度的主要目的是为了缓解我国高等�

全文总字数：5695字1. 研究目的与意义（文献综述） 近年来，随着计算机硬件技术和软件技术的不断更迭发展，各种新概念层出不穷，例如云计算、物联网、5G等，“万物互联”已经迈向了“万物智联”。作为联系计算机硬件和软件，为用户有效利用计算机提供良好运行环境支持的系统软件——操作系统，更是一直以来国内外专家、学者的研究热点。虽然它的庞大和复杂让许多人望之却步，但这激起了更多的人探索它的奥秘的兴趣和热情。 由于很多嵌入式系统对实时性有很高的要求，例如自动驾驶、航空航天等，微小的延时可能会造成很严重的后果。所以，硬实时系统已被广泛研究，并显现了它们在任何条件下都能够有效满足所有任务的截止期的优点。然而，在实际应用的系统中，许多组件可以容许超出截止期限些许，而不会影响它们功能上的正�

1. 研究目的与意义（文献综述） （1）研究背景: 随着汽车工业技术的不断发展，全球的汽车保有量不断增加，给人们的生活以及出行带来了极大的便利，当然事物都具有两面性，在汽车在不断提高我们的生活质量的痛时，也给我们带来了很多负面的影响，诸如环境污染以及交通事故等[1，2]。根据我国公安部门统计数据显示，我国近年来每年死于交通事故人数都达六万人以上，交通事故不仅造成了巨大的人员伤亡和经济损失，而且给人们的心灵造成了巨大的伤害[3]。所以提高汽车的安全性成为整个汽车行业所共同面对的问题[4,5]。 分析近年来发生的诸多交通事故，汽车正面碰撞事故在其中占巨大的比例，所以提高汽车的被动安全性能够有效的降低汽车安全碰撞事故的损失，而在被动安全性中最重要的也是最首要的当指汽车的抗撞性[6]。汽车保�

1. 研究目的与意义、国内外研究现状（文献综述）我国经济自改革开放以来持续增长，人民生活水平逐渐提高，人民对精神文化的需求越发旺盛，宠物市场也随之兴起。宠物能够满足主人的精神需求，成为了家庭的一员，宠物发生疾病也引起了主人的重视，对高品质的宠物医疗服务需求日益增加。胰腺炎是犬猫等常见伴侣动物常发的消化系统疾病。胰腺是重要的消化系统分泌器官，其分泌的消化液经胰导管进入十二指肠，具有很强的消化功能。胰腺炎是由于各种原因导致胰酶在胰腺内被激活，引起胰腺自身消化的炎症。胰腺炎主要分为急性胰腺炎与慢性胰腺炎，其中急性胰腺炎又可分为急性水肿型胰腺炎与急性坏死型胰腺炎，临床中以急性水肿型胰腺炎最为常见，犬较猫更易发生，尤成年犬多见。[1]引起胰腺炎的原因有很多，其中主要有1.暴饮暴�

1. 研究目的与意义（文献综述包含参考文献）Introduction1.1 Research backgroundVocabulary plays an important role in English learning and teaching. Without grammar, only a little can be expressed; without words, nothing can be expressed. A British psycholinguist (Meara, 1980), published the article "vocabulary acquisition is a neglected aspect of language learning" in the journal language teaching and linguistics. Since then, topics about vocabulary in various aspects have been brought into a heated debate. Numerous studies of different kinds have been carried out gradually. The emphasis of the study is mainly on the breadth (generally refers to the vocabulary size) and the depth (the proficiency in using various aspects of vocabulary). 1.2Definitions1.2.1 Vocabulary abilityVocabulary level is the core of language proficiency. The size of vocabulary and vocabulary breadth are the important barometers of English learners' language level. For L2 learners, mastering langua

1. 研究目的与意义Reading is an important way for people to obtaininformation in today''s society. In the process of language learning, learnersare required to do a lot of reading. It can be said that reading ability is thebasis for learners to develop other language abilities. With the development oflearning strategy research, reading strategy research has attracted more andmore attention. Reading strategies refer to the skills and methods of reading.They are the subjective selective and controlled behaviors taken by the readersin order to achieve the desired purpose. Reading strategies not only help toimprove the reading effect, but also help to guide learners to explore theirown reading and learning methods, and to enhance their ability to learnindependently and autonomously.2. 研究内容和预期目标 Theresearch content is the impacts of reading strategies (cognitive strategy/metacognitive strategy) on college students’ performance in tests. The keyquestion to be solv

全文总字数：2829字1. 研究目的与意义及国内外研究现状 管道运输由于其成本低、运输快、供给稳定等特点，已成为石油、天然气、生活用水、工业废物、工业原燃料等物质的基础运输工具，并与铁路、公路、航空、水运并列为五大基础运输方式之一。管道在使用过程中由于腐蚀、磨损、人为破坏等原因会造成管道内流体的泄露，给管道运输带来安全危害。当运输介质为易燃、易爆或有毒、有害物质时，发生泄露会造成巨大的损失和环境污染。因此，管道泄漏的早起检测越来越受到工程界的关注。 声发射是指伴随固体材料在断裂时释放储存的能量产生弹性波的现象。利用接收声发射信号研究材料、动态评价结构的完整性称为声发射检测技术。在管道泄漏上有十分广泛的应用。国内外研究现状 管道泄漏检测是随着管道运输业的发展而发展起来的，�

1. 研究目的与意义本文旨在研究非英语专业学生的阅读焦虑和阅读策略的整体情况、阅读焦虑和阅读策略对于四级英语成绩的影响以及阅读焦虑和阅读策略与四级成绩之间的关系。2. 文献综述Literature ReviewIts necessary to create an integrate and scientific framework, based on the pertinent literature on the relationship between foreign language reading anxiety, reading strategies and CET-4 scores.2.1 Foreign Language Reading Anxiety 2.1.1 Foreign Language Reading AnxietyForeign language reading anxietyis a processing activity which is of great value to us. Anxiety is a negative emotion. It refers to an individual's self-esteem, frustration, or anxiety caused by an increase in sense of failure and guilt due to the inability to achieve the desired goal or failure to overcome obstacles (Zhu Zhixian, 1989). Since the 1970s, the anxiety of language learning has gradually received attention from the academic session. In 1986, Am

1. 研究目的与意义Oral English learning is the most important part of learning,based on the current situation of Chineseinternational cooperation and economic reform and opening up.The paperhopesthat the research on the anxiety of students' oral English learning will help students to solve the problems of learning anxiety.First of all, this paper attempts to explore whether there is existence of anxietyof English Majors in Nanjing University of Chinese Medicine and the reasons for the anxiety.This paper will combine the input hypothesis and the affective filter hypothesis to propose suggestions to reduce the students' oral English learning anxiety and improvetheiroral English abilityand give teachers advices to arouse the enthusiasm of students, help students to rebuild the confidence of learning English, cultivatestudents' positive emotional attitude in English learning process, increase students' interest in learning English, make them be willing to understand the foreign cultu