Pre-Compensation for Continuous-Path Running Trajectory Error in High-Speed Machining of Parts with Varied Curvature Features

Parts with varied curvature features play increasingly critical roles in engineering, and are often machined under high-speed continuous-path running mode to ensure the machining efficiency. However, the continuous-path running trajectory error is significant during high-feed-speed machining, which seriously restricts the machining precision for such parts with varied curvature features. In order to reduce the continuous-path running trajectory error without sacrificing the machining efficiency, a pre-compensation method for the trajectory error is proposed. Based on the formation mechanism of the continuous-path running trajectory error analyzed, this error is estimated in advance by approximating the desired toolpath with spline curves. Then, an iterative error pre-compensation method is presented. By machining with the regenerated toolpath after pre-compensation instead of the uncompensated toolpath, the continuous-path running trajectory error can be effectively decreased without the reduction of the feed speed. To demonstrate the feasibility of the proposed pre-compensation method, a heart curve toolpath that possesses varied curvature features is employed. Experimental results indicate that compared with the uncompensated processing trajectory, the maximum and average machining errors for the pre-compensated processing trajectory are reduced by 67.19% and 82.30%, respectively. An easy to implement solution for high efficiency and high precision machining of the parts with varied curvature features is provided.

Building Features in Schools That Influence Academic Performance

School decision makers are faced with a great many decisions when considering a school renovation or new school building. All stakeholders want a building that is safe and provides an optimal learning environment. However, it is often difficult to know which building features will have the greatest effect on student learning. Because of a limited understanding of the relationship between individual building features and student learning, researchers at the University of Oklahoma hope to explore how building components influence student and teacher performance. This paper explores the importance of school building features that can be designed and changed during a renovation project. The hope is to one day determine which features have the greatest impact on student test scores. The research team believes that although it is difficult to find the exact relationship between each building features and student outcomes with one study, if multiple users repeat the same or similar studies, hopefully we will one day know the effect of these building features. In order to develop feature building users survey and physical assessment tools, it was necessary for investigators to develop a list of important building features and their associated definitions in layman terms. This was accomplished through utilization and conducting of a CAB （community advisory board） and subject matter expert materials. In addition, previous research relating to different school building features and their associations with student performance were reviewed. To define and narrow the list the researchers, community educational, and building professionals rated based on their professional experience, how directly related each feature is to student performance. The building feature list serves as a starting point to determine which features should be analyzed in a later phase of the project. It is hoped that resulting tools based on the work of this project can be used by school decision-makers and researchers to access building features that have been identified through research as being important for student and teacher performance.

Gender Classification Based on Multi-Scale and Run-Length Features

Human faces can convey substantial information about a person,such as his or her age,race,identity,gender,and emotions.Such facial information can be obtained through techniques like human facial tracking and detection,facial recognition,gender classification,emotion recognition,as well as age estimation.Of these,gender classification is particularly important due to its diverse applications in the fields such as video surveillance and commercial advertising.In this thesis,we propose a method of gender classification based on run-length histograms.The proposed method uses a run-length histogram to record the position information of pixels,thereby efficiently improves the recognition rate and makes the technique suitable for a big-data multimedia database.The experimental results show that the proposed method can achieve better accuracy than a multi-scale based method can.

The Features and Application of Cooperative Activities in Vocational School English Learning

In vocational school English teaching,cooperative learning is an available classroom structure.It can encourage and support most of the affective factors which correlate positively with language learning:i.e.reducing debilitating anxiety,increasing motivation,facilitating the development of positive attitudes toward language learning,as well as promoting self-esteem.And many effective cooperative activities are recommended in this thesis,which greatly enhanced the enthusiasm and initiative of students to learn English.

The Reliability of the 300-Yard Shuttle Run in High School Girls Basketball Players

The 300-yard shuttle run is a field test commonly used to assess anaerobic capacity. There is limited documentation regarding the reliability of the shuttle run for various populations. The purpose of this study was to assess the reliability of the 300-yard shuttle run in High School girls basketball players. Thirty nine High School girls basketball players performed two separate sessions of the 300-yard shuttle run. During each session, the participants completed two trials of the 300-yard shuttle run separated by a 5-minute rest period. The trial 1 and 2 scores were 66.2 - 4.9 and 69.1 - 6.0 seconds, respectively. The interclass and intraclass reliability coefficients were r = 0.84 and ICC = 0.83. The standard error of the measure was SEm = 2.2 seconds with 90% confidence limits Of UL： 2.6, LL： 1.9. The typical error expressed as a coefficient of variation percent was CV% = 3.2 with 90% confidence limits Of UL： 3.7, LL： 2.8. Within the parameters of this study, the 300-yard shuttle run is a sufficiently reliable field test for measuring anaerobic capacity.

The enlightenment of the development of New Oriental School on Chinese educational system

In modern society, the essence of social competition is the competition of talents who are in need of education, and the education＇s quality can decide a nation＇s future and destiny. With the continuous development of China, Chinese educational system is also facing a new stage of development. Starting with analyzing the case of New Oriental School, a very popular training institution in China, this paper finds its sponsoring characteristics and the current situation of education in China by surveying and comparing some data. It is found that New Oriental School＇s success is the integration of Chinese and western culture. On the one hand, New Oriental School pays attention to training teachers and learning advanced teaching ideas and methods of western countries, on the other hand, its education is directed towards Chinese examination-oriented education, which results from the current situation that China has a large population and sharp competitions and the examination-oriented education can not be replaced in this moment. Chinese education can get a lot of inspirations from New Oriental School＇s successful experience. This paper makes a suggestion that China can benefit from the mode of New Oriental School, learning the advanced concepts and teaching methods of western countries, and doing some improvements to explore a suitable way for Chinese educational development.

Brand New Exploration and Research on Characteristics of the Development of Each Cultural School in the Macro Development of National Culture

According to the overall development trend of the modern social development environment and social cultural atmosphere,it is necessary for the diversified coexistence of the national culture.Therefore,the cultural psychological school,constructivismschool and the universal evolution school have become the fundamental driving force for the development of the national cultures while their inherent development thoughts have also been provided with corresponding featured views.

基础教育集团化办学的“内卷化”困境及其纾解

集团化办学是我国基础教育领域的创新之举,其在扩大优质教育资源配置、带动薄弱学校协同发展、推进教育均衡发展等方面发挥了重要作用,但也出现了办学规模扩大、教育质量下滑或无效发展等问题。研究借助“内卷化”理论话语,透析当前基础教育集团化办学存在“科层制”权力运行模式衍生权力结构内卷化,错综的关系网络环境导致人际关系复杂化,“依赖性”的发展思维与路径致使发展动力外在化,过度的市场迎合取向造成优质资源供需失衡化等“内卷化”困境。纾解基础教育集团化办学“内卷化”困境可夯实学校共同体建设,建构多元主体权力结构;加强监管与法治建设,破除关系网络顽疾;激发薄弱学校内在发展动力,助力优质资源再创生;调适集团化办学规模,回归学校教育初心。

Helping Student Develop Argumentative Writing Skills through Rich Feature Analysis

The primary concern of this paper is to address the issue of discrepancies between teachers intuitively defined stronger and weaker student argumentative writings.There exists a problem in Chinese university EFL writing classrooms that the teachers'remarks on student compositions are often found to be rather vague or even unhelpful.Remarks such as Needs further amendment and You wrote just like the way you speak cannot supply students with explicit reasons of what is really needed for their writing improvement.Affirming the dialectal view on text-context relationship held by Systemic Functional Grammar(SFG),the theoretical propositions of Rich Feature Analysis(Barton,2004) are contended to a sound solution to the problem proposed by this paper.To demonstrate its feasibility,the paper followed the gist of Rich Feature Analysis to analyze a corpus of four argumentative writings on same topics.The paper consolidates "the spoken-written continuum"(Barton,2004,p.64),and concludes stronger argumentative writings should own at least one of the following properties: product-like,condensed,recursive,coherent,distanced,and open to scrutiny.The absence of lexical density and nominalization constitutes the main reason for writing deficiencies by tertiary students.The implications for learning the register of schooling are discussed.

基于波特五力模型的中外合作办学竞争态势研究

随着国际形势的深度演变和调整,中外合作办学在推动国内国际双循环相互促进的高等教育新发展格局方面将发挥独特且重要的作用。通过引入“波特五力模型”,基于举办方、用户、潜在新增办学体、其他类型办学体、同类内部等五个方面,从宏观维度全面系统分析当前中外合作办学面临的系统性竞争态势。主要表现为:举办方投入呈现出政府财力与外方师资的双重聚集效应;用户评价呈现差异化诉求与认可度提升并存;替代品竞争呈现市场细分背景下的“错位竞争”格局;新进入者竞争呈现国家政策引导与高校发展需求助推市场扩充态势;同类内部竞争表现为举办方办学实力及社会声誉辐射衍生的分层现象。研究认为,中外合作办学应实施差异化竞争策略,彰显中外合作办学独特优势及特色;推进集中型战略,形成多元化办学格局;广泛吸纳各方资源,构建办学投入长效机制;有效提升社会发展贡献度,广泛提高认可度和知名度。

基于多传感数据融合的变速运行齿轮异常振动故障诊断

变速运行齿轮异常振动故障诊断性能过差会增加汽车维护成本,缩短齿轮使用寿命。为了及时识别齿轮故障,保证汽车变速器总成具有良好的振动特性,提出基于多传感数据融合的变速运行齿轮异常振动故障诊断方法。通过分析多传感器数据融合技术,掌握变速运行齿轮异常振动故障诊断的理论框架,并以此为基础,参考传感器融合模块、特征级并行多神经网络局部诊断模块和终端分类模块,结合变分模态分解、多通道加权融合和单隐层前馈神经网络训练算法,从信号采集、信号特征提取和信号特征分类3个步骤实现变速运行齿轮异常振动故障诊断。实验结果表明:在齿轮发生轻度磨损时,磨损振动信号的幅值在20~40 mV之间,磨损振动信号的频率在0~4000 Hz区间;中度磨损时,信号的幅值在30~55 mV之间,信号频率在3000~7000 Hz区间;重度磨损时,信号幅值在50~70 mV之间,信号频率在6000~12000 Hz区间,且各阶段诊断结果均与故障程度的实际转折点吻合。由此可知在各样本数量均相同的情况下,提出的故障诊断方法预测值与真实值均相同,故障程度和故障类型的诊断性能均较好。

高端装备产业学院办学模式及建设路径研究

高端装备产业学院作为培养高端装备制造人才的重要基地,其办学模式和建设路径对于提高人才培养质量和满足经济社会发展需求具有重要意义。渤海船舶职业学院高端装备产业学院从机制体制建设、专业建设、课程教材建设、实训基地建设和师资队伍建设等方面入手进行了改革,取得了一定成效,为我国高端装备产业发展培养了大批高素质技术技能人才。

教育强国背景下中外合作办学提升高等教育国际影响力策略研究

在加快建设教育强国进程中,中外合作办学对提升高等教育国际影响力具有重要作用,且在提升拔尖创新人才培育力、国际学生吸引力、科研学术引领力、跨境教育“中国方案”影响力等方面具备了一定基础。然而,目前我国中外合作办学尚存在结构布局不够均衡、拔尖创新人才培养质量有待提高、服务国家和地方发展能力亟须提升、高效能治理体制机制尚需完善等问题。为此,中外合作办学应加大改革创新力度,补齐短板,在适度统筹规模和效益、调整优化结构布局,加大支撑保障力度、多渠道提升人才培养质量,聚焦科技前沿和国家关切、把好引进和审批准入关,完善合作办学治理体系、探索中国特色的合作办学模式等方面持续发力,不断提高中外合作办学水平,切实提升我国高等教育国际影响力。

“学校—培训机构”特色课后服务合作行为机理及困境突破——基于社会交换理论的分析

“学校—培训机构”合作是特色课后服务供给的重要模式。从社会交换理论视角分析学校与培训机构的合作行为机理发现,报酬吸引与组织支持促成双方的合作动机,资源吸纳与权力依赖促使双方合作达成,信任维系与秩序强化保证双方的持续性合作。但是,“学校—培训机构”合作仍存在组织信息不对称导致合作动机减弱、监管机制不到位导致资源吸纳利用率低、主体沟通不顺畅导致合作难以持续等问题。因此,应强化信息透明,稳固特色课后服务的吸引力;加强运行监管,增加特色课后服务的吸纳度;畅通交流渠道,保障特色课后服务的持续性,以更好地发挥课后服务的育人功能,满足学生的多样化需求。

教育信息化2.0时代职业本科“五维”教育新生态构建

教育信息化2.0可推动职业本科教育办学定位、发展路径、培养方式、专业教学的迭代升级,对促进职业本科教育高质量发展具有重要意义。为适应教育信息化2.0时代,职业本科院校教育办学定位需要坚持“职业”类型和“高等”层次属性并重,发展路径需要遵循“省级政府、教育部与职业本科院校”统筹规划联动,培养方式需要强调“人才培养目标+办学资源+教师团队”与时俱进,专业教学需要倡导“发挥特色、注重实践与追求高质量”。结合教育信息化2.0时代教育发展理路,职业本科院校可从教学、学习、主体发展、动力、要素交互五个维度,构建以信息化、个性化、多样化、协同化、层次化为特征的职业本科“五维”教育新生态。

产教融合视域下行业协会举办职业教育的动因、问题及策略

随着职业教育逐步转向社会多元办学的发展格局,作为产教之间枢纽的行业协会,在职业教育发展中的地位日益得到重视。行业协会举办职业教育是职业教育融合发展的新路径,是产业与教育高质量同频共振发展的枢纽,但是现实中还存在政策法规不完善、组织结构不健全、办学功能不充分等制约因素,直接影响行业协会举办职业教育的作用发挥。因此,政府和行业协会应同向发力,通过完善政策法规,保障行业协会办学权利;健全治理体系,激发行业协会办学活力;创新举办形式,构建多元共商决策机制,使行业协会成为职业教育多元办学的生力军之一。

新时代职业教育评价改革困囿与创新探索

职业教育评价是实现职业教育高质量发展和培养技术技能人才的关键抓手。当前,国内职业教育评价多囿于传统教育评价体制所限,普遍存在以总结性评价为主、发展性评价不足等泛化现象。新时代的职业教育评价改革创新是推进当前职业院校自身变革、提升职业教育质量的关键性内驱动力,应通过定位教育类型、办学特点、实现路径等要素,创新评价生态模式和质量考核理念,构建一体联动的专业化强效评价体系,达到改进职业教育评价的效果。

软件工程学术型硕士研究生培养方案优化与实践

在智能化时代背景下对高水平软件人才培养方案进行优化与实践,提升学术型硕士研究生综合能力以应对智能化时代日益复杂的现实问题,从而满足软件研发对人才能力和素质的要求。通过优化培养方案,构建人工智能与软件工程学科相结合的课程新体系,将科技项目研究融汇于研究生培养过程中;强化培养重点环节的管理与考核,促进研究生的学术成果产出,突出学校育人特色;亟需明确软件工程学科建设目标、改进人才培养方案、合理设置课程、与科研项目相结合,使得学科成果可满足软件领域卓越人才培养的需求。

高中教育办学模式改革的理论逻辑与行动策略探析

高中教育办学模式选择应当基于合规律性及目的性的理论逻辑。为了破解我国目前存在的普通高中规模过大、职业高中发展缓慢、综合高中缺位、普通教育与职业教育之间缺乏必要整合等难题,推动我国高中教育多样化发展,应当促进普通高中教育转型发展,大力发展职业高中,探索综合高中办学模式,在多种办学模式之间建立必要的链接等措施来推进我国高中教育办学模式改革。