浅析Pro／E数控加工中的参数设置

数控加工中的参数设置是数控加工工艺中的重要内容,它不仅影响数控机床的加工效率、待加工工件的加工精度,而且直接影响加工机床的使用寿命。当前,采用CAD／CAM技术,在计算机上完成加工模型的设计、制造工艺的制定及编程并在数控加工中直接利用CAD的设计数据联机加工已日益普及,文章主要分析和探讨Pro／NC软件环境下数控加工的参数设置。     

动态加工在数控铣床实训中的应用

本文介绍了动态加工在数控铣床实训中的应用。动态加工是Mastercam软件的最新数控编程技术。动态加工是一种先进的加工理念,区别于传统加工理念,所生成的数控加工刀路更平顺,效率更高,加工过程更稳定。因此在数控专业的数控铣床实训过程中引入动态加工,并通过常规加工与动态加工实际加工过程的对比,使学生更直观地掌握先进的加工理念。     

高速切削加工模具的关键技术研究

叙述了实现模具高速切削加工所必需的机床、刀具、工艺等关键技术,通过加工实例说明利用高速加工技术加工模具提高了模具的加工精度,缩短了加工时间。     

细长轴恒力切削的智能控制技术

介绍了细长轴的加工特点以及切削时的加工误差,提出了将智能控制技术运用到数控加工细长轴中,实现加工细长轴时的恒力切削,从而减小其加工时的受力变形,在提高了加工精度的同时也提高了加工效率。     

线切割在模具加工中的应用

加工的型腔。半预先加工穿丝孔,凹模穿丝空的切割进行摘要：线切割加工的特点,利用线切割进行典型凸模、凹模的分别加工和配做法,加工凹模型腔时穿丝孔的加工,新型的锥度加工及慢走丝的应用。     

基于Masterean凹、凸曲面加工方式应用研究

本文基于Mastercam曲面加工的特点,研究了凹、凸形曲面平行铣削、放射状、等高外形等典型的粗加工和精加工的加工方式,比较它们的加工路径、加工质量及加工效率,得出了高效、优质、省时的曲面加工方法。同时为其它自动编程软件的曲面加工的高效加工研究提供了借鉴。     

“正”“反”相通

[题目]王师傅加工一批零件,原计划每天加工25个,18天完成加工任务。结果前3天就加工了90个零件,照这样的加工效率计算,只要多少天就能完成加工任务?(用比例解)     

CK6132型数控车床加工典型零件探析

通过对机床特点的深入了解,用CK6132型数控车床加工典型零件,进一步提高工艺分析、工艺设计及工艺技术文件的程序编写,提高综合数控加工技能.掌握零件加工的步骤和每一步的加工要求,同时认真考虑加工三要素的设定,它们是加工中最重要的三个参数.合理设置可提高加工精度,缩短加工时间,节约生产成本.     

加工负荷和加工时间对工作记忆广度任务成绩的影响

以大连市某小学40名五年级学生为被试,通过改变加工负荷和加工时间,考察了加工负荷和加工时间对工作记忆广度任务成绩的影响。结果表明,加工负荷和加工时间对工作记忆广度任务成绩有重要影响,加工负荷越高,被试的工作记忆广度任务成绩越低;加工时间越长,被试的工作记忆广度任务成绩越高。     

浅析机床加工误差的原因及消除方法

加工精度是衡量机器零件加工质量的一个重要指标.由于影响加工精度的因素诸多,不易有效控制,因此提高加工精度减小加工误差较为困难,研究机床加工过程误差的产生及防止对提高机床加工精度有着重要的意义.     

试析体育教学中如何激发学生学习主动性

学生学习的过程是一个心理构建的过程,而不是一个简单的传送过程。面对学生学习的依赖性、厌学情绪和学习效率低下等问题。教师应树立以人为本的教育观念,把学习的主动权还给学生,通过一些有效的途径激发学生的学习主动性,使学生能以愉快的心情面对学习,主动地参与学习,从而提高体育教学效果。     

Learning to teach in higher education: how to link theory and practice

In this study the learning process of 12 Dutch novice university teachers was monitored during a five-month induction programme. The teachers were interviewed before and after the programme and were asked to fill in several email logbooks during the programme. A change process was identified, in which experiencing and experimentation played a central role. In particular, modelling by the teacher educator, the observation of video cases, reflection on these with peers and experiencing success in their own practice seemed to be important incentives that encouraged teachers to adopt and eventually implement new pedagogical approaches. On the basis of our data, we think that teachers' conceptions and teaching practice are best developed simultaneously and that the design of induction programmes should support this process.     

固定化微生物--曝气生物滤池工艺在废水处理中的应用

采用固定化微生物-曝气生物滤池污水处理系统（IBAF工艺）对多种实际高浓度有机废水进行实验研究。实验结果表明：该工艺在去除COD、氨氮、挥发酚、色度、SS方面具有独特的优势，将成为处理高浓度有机废水的主导工艺。     

Opportunities to Explore for Gifted STEM Students in Korea: From Admissions Criteria to Curriculum

The admission process and curriculum for gifted students are crucial because they provide opportunities to explore (OTE) for gifted science, technology, engineering, and mathematics (STEM) students. Korean specialized STEM schools, science academies (SAs) and science high schools (SHSs), claim that their screening process and curricula are based on their educational philosophy and goals. This article examines how SAs and SHSs make efforts to offer OTE in STEM disciplines by controlling the admission process and curriculum. It is found that SAs have enough flexibility in providing OTE that emphasize creativity. SHSs, however, are limited in providing such OTE and instead value high achievement more.     

静而相协动而生异--词与音乐关系浅论

文章以词和它的音乐形式为立足点，从其产生的艺术理论基础出发，说明了在词产生之初，音乐从旋律、节奏、乐声和乐韵等方面对词的分片、句式、字声和用韵的决定作用及其具体体现。又以历史进步的角度，观察了在音乐形式的内容决定下，词由依附音乐渐趋独立的过程，以及它和音乐互动发展，相互影响的关系变化。从字的内部乐音规律，到词的外部音乐形式，本文也都加以尝试论述，以求更加明晰的论证音乐和词的密切联系。     

一个形式化基于规格说明类测试的方法

1IntroductionSoftwaretesting means a process of analyzing a soft-ware item to detect the difference between existingand required conditions,that is,bugs,and to evaluatefeatures of the software item.It accounts for a largepart in the cost of software development andmaintenance[1].In order to reduce its cost,there hasbeen much research on automating this work.It in-cludes automating test case generation,test-driving,regression testing and testing process management.Usually,the way of testing so…     

Peer development as an alternative to peer observation: a tool to enhance professional development

Many higher education institutions worldwide require that all academic staff undergo a peer observation of teaching each academic year. Within one department in a university in the South of England, questions have arisen about the value and purpose of the traditional ‘peer observation’ process, and as a result a new voluntary system of ‘peer development’ has been introduced. This paper explains the rationale underpinning the new peer development process, and explores its worth and value to those who have participated in it as a mechanism for professional development. Reflections on the process are considered, along with what can be done to improve the new system.     

元认知策略在写作教学中的应用

写作是学生英语学习中的薄弱环节。元认知是学习者对自己学习过程的自我监控,是学习者为有效组织学习活动而采取策略性行动的知识和能力,以及在具体学习过程中使用策略的具体做法。本文试图将元认知理论运用到英语写作教学中,从丰富元认知知识及指导学生对写作过程进行计划、监控、调节方面来论述怎样进行写作元认知教学。     

走华盛顿协议之路

关于国际工程专业互认的华盛顿协议的组织正在不断地发展壮大.从德国的例子可以了解申请加入该协议的国家在工程教育和工程专业认证方面作了哪些改革和建设.从香港的例子又可以看到已经签约的工程组织在学历、学位和工程专业资格等的国际互认方面所取得的长足进步.申请加入华盛顿协议的过程,表面上是一个国家工程专业认证的建设过程,实质上是一个国家的工程教育与国际接轨和为工程人才流动开辟道路以及国家的经济全球化扫清障碍的过程.