基于课程标准的“机械能及其转化”的教学设计

以基于课程标准的教学理念为指导,以义务教育初中物理"机械能及其转化"一节为例,在教学任务分析与学情分析的基础上,设计了源于课程标准的教学目标、评价活动、教与学的活动,设计与制作了"上滚瓶"、"弹簧滚摆"等教学用具,用于创设情境,突破教学难点.     

《滚铁环》教学设计

一、本课教学设计的指导思想根据新课程标准,我为学生选择合适的学习内容:民族民间体育活动滚铁环,课中力求尊重学生的主体地位和个体差异,为每一位学生提供有利于学习的机会,在教学中通过小游戏和各种不同形式的学练方法,为学生营造一个快乐健康的课堂教学氛围,使学生滚铁环能力得到发展,从而"滚"出快乐,"滚"出健康,"滚"出趣味。并通过团队合作、集体评价与展示来不断激发学生的学习兴趣,充分发扬民族精神,培养学生良好的心理品质和团队精神。     

木珠滚画

木珠也能当画笔?这里我们介绍一种让宝宝和爸爸妈妈玩木珠滚画的方法。事前准备好纸盒盖、颜料(红、黄、蓝等)、木珠子、布。先把木珠子蘸上黄色,放在一张白纸(或白布)上,木珠滚画开始啦。爸爸滚一滚,妈妈滚一滚,宝宝滚一滚;前滚滚,后滚滚,左滚滚,右滚滚,角落边缘滚一滚。用布擦干净木珠子,再蘸上红色或蓝色,……宝宝想怎么滚就怎么滚,只要宝宝玩得高兴,滚画滚得尽兴就好。最后,让宝宝发挥想象,说说画面像什么,如果觉得还缺少点什么,爸爸妈妈可以启发宝宝添画。     

基于CATIA的销齿轮参数化设计

介绍了运用CATIA软件对销齿轮进行参数化三维建模的方法。该方法实现了改变基本参数,立即得到相应的销齿轮三维模型的参数化设计,提高了设计人员的工作效率。     

民族乐器阮指弹滚奏衍生技术训练要点分析

民族乐器阮右手技术系统众多的演奏技法中,滚奏是其中最重要的技法之一.指弹滚奏的衍生技术主要包括短滚、长滚、滚挑、双滚、扫拂滚等五种.本文详细分析各种技术的训练要点及其应用.     

大红布——中班体育活动

设计意图 每天的户外活动时间,我们让幼儿练习爬、滚、跳等动作,这也是中班领域目标的基本动作要求。     

会滚的“汽车”

一只大木桶在路上玩,它不停地滚啊滚……一只小鸡,一只小鸭,还有一只小鹅见了它,大声喊：“你是会滚的汽车吧?停一停,停一停!请你送我们回家好吗?”“好呀,好呀!”大木桶停了下来,说：“嗯,我是会滚的汽车,那就请上车吧!”小鸡、小鸭和小鹅,蹦蹦跳跳钻进了大木桶里。大木桶又滚啊滚,滚啊滚——小鸡、小鸭和小鹅唱起歌儿来。     

神奇的力量

一颗种子粘在了一只鸟的脚爪上,他被这只鸟带着飞了很远很远的路。最后,他从鸟的脚爪上跳了下来,落在一个光秃秃的山上。这颗种子顺着山路滚啊,滚啊,身上沾满了泥土;滚啊,滚啊,身上磨破了皮;滚啊,滚啊,最后,停在了一块大石头旁边。这颗种子看见一个大大的、黑黑的东西,吓了一惊:“你是谁?“种     

风电偏航变桨用四点接触球轴承锥销结构设计改进

介绍了偏航变桨用四点接触球轴承锥销设计结构,分析偏航变桨轴承锥销失效形式,针对失效形式提出改进设计方案。实践证明,改进设计措施有效可行,提高了轴承的设计可靠性,降低了风机运维成本,保证风机长久持续无忧运转。     

班级活动引发的滚雪球效应——小学班主任班级活动手记

小学班级活动就像滚雪球,重要的不是结果,而是过程,滚雪球,滚的是一份快乐。雪球越滚越大,滚的是收获;越滚越实,滚的是冰清玉清。就是滚化了,也会润物无声。班级活动就是就像滚雪球,要让一个活动带起一片效应。让活动一开始就获得优势,并在后续中,让优势越来越明显。     

线性表顺序和链式存储的对比分析

顺序和链式存储是线性表不同的存储方式,它们各有优劣,存储方式不同,所对应的算法操作也不同,实现的效率也有差异。通过对两种存储方式及三种基本操作进行对比分析,加深学习者对线性表存储结构与对应算法关系的理解,学会对时空效率的权衡,使用户能选择合适的存储结构和算法,以满足自己的需求。     

农村连锁经营实用人才培养研究

新型城镇化过程中农村流通服务业的升级,需要大批的农村连锁经营实用人才的支持。为规范人才培养工作,文章以农村地区连锁企业为对象,开展调查分析,构建了农村连锁经营实用人才素质模型。同时,依托该素质模型,针对实用人才培养工作,提出了推行职业资格证书、搭建统一培训平台和建立终身教育体系等改善建议。     

一种链函数滤波器及其应用

提出了一种滤波器传递函数——链函数滤波器,链函数能给出一系列在同样的阶数下,产生不同响应的传递函数.根据技术指标和元件特性,可选择所需要的滤波器.当给出回归损耗和带外抑制特性时,也可以设计这种滤波器.给出了链函数传递函数的表达式,分析了链函数滤波器的极点分布和群延迟特性.同传统的切比雪夫和巴特沃思函数相比,这种改进型的链函数滤波器表现出许多优点.     

Interaction between supply chain risk and organizational performance

To offer a theoretic guidance to practice, on the basis of the work in an emerging strand of supply chain management and by matching the constructs of performance and risk together, a framework between supply chain risk management and organizational performance is developed. The framework includes a series of mutually associated processes as follows: risk sources and profiles, risk and performance drives, risk and performance consequences, risk management responses, and risk and performance outcomes. Furthermore, every process is elaborated on in detail. Thereinto, organizational performance consists of efficiency and effectiveness which is linked to risk drivers and risk management responses. Finally, some necessary discussions and supplements are put forward from a practical point of view. This study is to some extent expected to be conducive to the theories and the practice of supply chain management for contemporary enterprises.     

Stimulus devaluation and extinction of chain schedule performance

Pigeons were trained on a two-component multiple schedule in which each separate component consisted of a three-link chain schedule. After initial baseline training, the stimuli correlated with the terminal links of each chain were presented in a successive discrimination, with one stimulus continuing to be associated with reinforcement while responses to the alternative stimulus were extinguished. Subjects were then returned to the original chain schedule, but with extinction in effect in both components of the multiple schedule. In two separate experiments, extinction of initial-link responding was not affected by which terminal link had been extinguished during the separate discrimination training, indicating that devaluation of the terminal link was not transmitted directly to the initial link of the chain. There was also no effect of the devaluation procedure during the first session of testing on responding in the middle link of the chain, but an effect did develop with continued extinction of the entire chain when the terminal components were presented during extinction. When the terminal components were omitted, however, the latter effect did not occur. Also, when the terminal link was omitted, extinction occurred more rapidly in the middle component than in the initial component, indicating a backward pattern of extinction.     

自旋派尔斯链热力学性质研究

结合热相干态近似和玻色化技术,扩展应用量子自洽理论讨论了低温下自旋派尔斯链的磁性激发和热力学性质。研究发现自旋激发能隙随温度升高而单调下降,于派尔斯相变点(TP)消失,在TP附近,比热随温度升高而迅速增强。TP的标度关系符合TP∝δ(0)^0.66。     

燃烧中的链式反应

1 前言 燃烧作为一种剧烈的化学反应,是可燃物与氧化剂作用发生的放热反应,通常伴有火焰、发热、发光或发烟现象。可燃物燃烧导致的火灾给国家、给社会带来巨大的损害。