冲压成形过程中机械运动的控制与运用

在冲压过程中，机械运动贯穿始终．各种冲压工艺的实现都有其基本运动机理，这种成形运动是与模具密切相关的，各种模具的结构设计和力学设计最终都是为了满足其能够实现特定运动的要求．设计的模具能否严格完成实现冲压工艺所需的运动，直接影响到冲压件的品质，所以在模具设计中应对机械运动进行控制．同时为了达到产品形状尺寸的要求，不能拘泥或局限于各种工艺基本运动模式中，而应不断发展和创新，在模具设计中灵活运用机械运动．     

留日学生在清末立宪运动中的作用初探

20世纪初在中国爆发的立宪运动，是中国近代史上一次民主化运动，也是中国的先进分子试图以和平的手段从根本上挽救民族危机的一种有益的尝试。清末留日学生直接推动着中国立宪运动的进行。运动中，他们积极推动全国的立宪人士由分散走向联合，促成全国性立宪团体乃至政党的成立；以各种手段宣传立宪，进行宪政的启蒙；是推动全国规模的国会请愿运动的进行。虽然他们的尝试最终失败了，但是，此次运动对后世的影响极大，其历史作用不容抹煞。     

先锋派理论研究相关概念界定及研究路径比较

先锋派运动是20世纪上半叶西方重要的文化历史现象。20世纪的西方文艺理论家们从不同的审美视域、文化立场出发，对其进行了多元化的阐释，使先锋派运动自身蕴含的多义性得以较充分地展示。本文试图对西方理论家们的各种先锋派理论进行梳理，选取具有代表性的理论予以阐述，以期客观呈现20世纪以来先锋派理论研究的概貌。     

浅谈冲压模具工艺运动控制方法

在冲压加工过程中,模具构件之间的机械运动贯穿始终。各种冲压工艺的实现都有其基本运动机理,这种运动是与模具密切相关的,各种模具的结构设计和力学设计最终都是为了满足其能够实现特定运动的要求。设计的模具能否严格完成实现冲压工艺所需的运动,直接影响到冲压件的品质,所以在模具设计中应对机械运动进行控制。同时为了达到产品形状尺寸的要求,不能够局限于各种工艺基本运动模式中,而应不断发展和创新,在模具设计中对机械运动灵活运用。     

群钻数控刃磨模型的研究与实践

本文对各种类型的群钻的几何模型进行了分析，并相应地建立起群钻各型面的数学表达式。进而，依据运动合成原理，运用矢量分析方法建立了群钻各种型面刃磨运动模型。     

借分解质点系运动剖析其运动量及惯性力系—来自动力学教学改革实践的思考

质点系的运动可分解成随其质心作平动与相对于质心作运动；借用这种手段不仅可深入剖析质点系各运动量的物理意义与惯性力系的简化结果，而且能透析刚体各种运动的特征，将刚体各运动量与惯性力系简化结果的各种计算公式联系起来，还能扩充掌握刚体对任意固定轴动量矩的计算。为此项教学改革，弃去现有众教材的动力学内容传统体系，并适当补充一些概念，将学生从机械记忆公式中解脱出来并走出迷惑困区。     

体育教学中融入心理训练方法初探

通过课堂中对学生进行各种心理训练，提高学生的心理素质，激发学生的运动潜能，从而达到教学目的，也充分体现了素质教育的理念。     

群钻数控刃磨模型的研究与实践

本对各种类型的群钻的几何模型进行了分析．并相应地建立起群钻各型面的数学表达式。进而，依据运动合成原理，运用矢量分析方法建立了群钻各种型面刃磨运动模型。     

美国哈佛大学“0点项目”课程各领域活动介绍（续）

儿童运动知觉的发展按照一定的规律进行：①孩子们对自己身体的意识；②孩子们表现各种运动方式；③孩子们将身体运动作为一种表达方式。对幼儿运动发展阶段和幼儿身体发展速度差异的理解能帮助教师更好地计划和指导幼儿进行各种身体运动。     

漫谈物理课教学中对学生辩证唯物主义观念培养

培养学生辩证唯物主义观念是高等学校育人的重要内容之一。物理学中包含着丰富的辩证唯物主义思想，在物理教学中若能充分利用这一条件对学生进行辩证唯物主义观念培养，必会收到较好的效果．本文想就这一问题谈些粗浅的看法，愿能起到抛砖引玉的作用。一、结合物理学研究对象对学生进行物质世界观教育物理学是一门研究自然界中各种物质（非生命物质）运动变化规律的科学。宏观物理学研究自然界中人的眼睛可以看得见的各种物质运动变化规律．这些规律可以归纳为机械运动规律、电磁运动规律、热运动规律。微观物理学研究组成物质的原子内部各…     

汉语位移事件的类型和性质

位移事件可以分为自移事件和致移事件两种类型：无生自移一般用复杂表达式,不用简单表达式,有生自移既可用复杂表达式,也可用简单表达式;致移事件一般使用复杂表达式,极少使用简粤表达式。从位移事件的性质看,可以分为：现实位移和虚拟位移,自主位移与非自主位移,有界位移和无界位移。     

The motion variable in procedural learning

Conclusions Differences in performance of a procedural task, attributable to motion, are identified with the putting together of a new motor response. No reliable difference was shown between motion and still sequences in the overall procedural sequence of steps. The use of animation arrows to direct attention and to show the direction of motion did not help learning. Motion does not appear to function as a cue focusing attention upon the direction of movement or critical elements of the display. The results of the present studies support the recommendations of Allen and Weintraub (1968). They suggest that the use of motion in a display is definitely indicated when the particular content to be learned consists of the movement itself and its characteristics, or where the content is enhanced and differentiated by the cues provided in the action of the movement. Until the bases for differential individual needs for motion can be determined, displays that provide motion are best used wherever procedural tasks requiring motions new to the student are taught. The research reported in this paper was performed at HumRRO Division No. 2, Fort Knox, Kentucky, under Department of the Army Contract with HumRRO. The contents of this paper do not necessarily reflect official opinions or policies of the Department of the Army.     

The motion of a charged particle in a magnetic field produced by a column current

To determine the motion of a charged particle in a magnetic field produced by a current flowing along a long column conductor, the equation of the motion was established on the basis of Lorentz force. Qualitative analysis and quantitative solutions demonstrated that the motion contains nonlinear oscillation. The oscillation can be treated as the perturbation of the helical motion, Which the particle undergoes in a special condition. The general motion is superposition of two helixes, one as an axis spiraled by another. It is proven that the oscillation is stable.     

机械系统运动方案设计方法探讨

机械系统运动方案的设计在整个机械设计过程中起着关键作用，决定着机器的产量、使用功能及整体性能。设计过程蕴含着创新，一个好的机械运动方案就是一个创造发明。从理论和实践两个方面探讨机械系统运用方案设计的一般规律性。     

基于FlashMX的物体斜上抛运动的编程方法

用Flash MX中的ActionScript实现物体斜上抛运动,绘制出运动轨迹和函数图形,制作出交互 式多媒体课件,可以动态再现物理教学的过程。论文阐述了斜上抛运动课件的编程方法及设计思想,给出 部分原程序。     

带电粒子在均匀恒定正交电磁场中的运动

根据运动方程 ,讨论带电粒子在均匀恒定正交电磁场中的运动 ,并通过简明的物理分析 ,理解粒子的运动规律及其轨迹的形成     

The effect of the direction of motion on students' conceptions of forces

The ability to generalise principles to a range of situations is generally considered to be important in science education. However, several studies have found that students do not consistently apply their conceptions in the study of mechanics, and that they respond to irrelevant contextual features of the question, such as the type of object in motion. The present study was designed to investigate whether the direction of the motion (i.e. vertical or horizontal) was a contextual feature which influenced students' ideas about the forces involved in motion. The results indicated that 14% of the university science teaching students studied and 25% of the Year 10 students were influenced by the direction of the motion. Some of these students described a ‘motion force’ in one direction (usually vertical) but not the other, while others described forces opposing the motion in one direction (which was always vertical) but not the other. Specialization: science education     

台风结构的非对称性对台风运动的影响

本文分析了台风中心附近涡度局地变化■／■t的非对称性对台风加（减）速运动的影响结果表明，突然加速的台风，其前方和后方的■／■t分别为较大的正值和较小的负值；而突然减速的台风，其■／■t的分布则正相反此外，设计了一个综合考虑引导气流、涡旋结构以及涡度变化等因子作用的台风运动的预测方案。     

Towards a Complete Commonsense Theory of Motion: The interaction of dimensions in children's predictions of natural object motion

Events involving motion in fall are differentiated psychologically from events involving horizontal motion. Do children associate motion down inclines more with motion along horizontals or more with motion in fall, or do they even treat it as an integration of the two? The question was raised over 20 years ago but never satisfactorily answered, so the principal aim of the reported research was to take matters forward. Children (n?=?144) aged 5–11 years were assessed while predicting natural dynamic events along a horizontal, in fall and down an incline. They were required to make predictions of speed with heavy and light balls and under changes in incline heights. The results show that, consistent with previous work, faster horizontal motion was associated with the light ball across all ages, whereas faster fall was associated with the heavy ball. However, while the younger children predicted faster incline motion for the lighter ball, there was a shift in this conception towards older children predicting faster motion for the heavier ball. Understanding of how changes in incline height affect speed was generally good, with this aspect of the study helping to establish how children perceive diagonal dimensions. How supported horizontal motion and unsupported fall motion may affect children's changing understanding of incline motion is discussed, thus providing more complete insight into children's understanding of natural object motion than has been established so far.     

圆锥摆模型

由圆锥摆模型,引入同频率、同振幅、振动方向互相垂直的简谐振动的合成和简谐振动的旋转矢量表示法,化抽象的理论为形象的内容,这是学生易于接受、符合教学规律的教学方法。