摘要：根据教学实践,阐述多媒体在高分子物理教学中的优点,通过高分子链构象中内旋转构象和链柔顺性这一具体案例的讲解,介绍多媒体教学课件的设计思想、实现方法和特点。

摘要：管状居住空间激活城市＂众建筑＂工作室（PAO/PIDO Office Design）应邀参与香港连卡弗百货公司165周年庆祝活动,该工作室带来了一种新的未来居住空间——＂管·住＂（Tubular Living）。这种管状居住空间的设计灵感来自于建筑中的通风管道和机械结构,其中有的管可作为超大的扬声器,有的管可作为家具使用,竖直的管塔在空中水平分叉,形成悬浮管状空间,通过管内旋转楼梯到达。

摘要：With the aid of numerical method, both flow field and its accompanied loss mechanism within the rotating cavity are investigated in detail in the 1^(st) part of the two parts paper. For ease of comparison, rotating cavity is further classified as the rotor-stator cavity case and the rotor-rotor cavity case. Results indicate that flow within both kinds of the cavity act as the inviscid flow except that the flow near walls, neighboring the lower G region and in the vicinity of the rotating orifices. In the regions except such inviscid-flow-dominate domains, the theoretical core rotation factor can be safely used to predict the swirl ratio within the cavity. When detailed flow pattern is considered, Ekman-type flow exists near periphery of the surface's boundary layer where viscous effect is non-negligible. However, due to the complex profile of the simulated cavity case, vortices structure is varied within the cavity. By comparison, swirl ratio can be used to predict the magnitude of loss. Due to the relatively evident rotating effects of the rotor-rotor cavity, swirl ratio even increases to 1.4 in the current model, which means that flow is moving faster than the surrounding disc. Further investigation finds that this kind of highly rotating flow is accompanied with serious undesirable pressure loss. Parenthetically, unlike its counterpart, swirl ratio above 1.0 doesn't happen when fluid passes through the rotor-stator cavity. So it is suggested that rotor-rotor flow cavity with the superimposed inward throughflow should be avoided in the engine design or certain measurements should be provided when such structure design is unavoidable. Simulation done in the current paper is meaningful since these dimensional parameters are typical in the design of state-of-art. Relatively lower range of Re_φ and C_w is not considered in the current two parts paper.

摘要：“内炎”龙卷火燃气灶是林内推出的燃气灶新品,它采用了全新的设计理念,代表着当今灶具发展的潮流,与火焰向外的普通灶具相比,“内炎”灶具火焰藏于灶具内部燃烧,而且其出火孔是向内倾斜的,火焰向内旋转燃烧,形成一股旋转火,形象的称其为“龙卷火”,其热效率比普通煤气灶高很多。

摘要：用透明管子作成软管水环和喷嘴,采用罗达明染色法和黑光照像来测定混凝土混合料通过软管和喷嘴处时的运动轨迹。在试验中发现干拌料在水环前软管中是平行运动,当一经加水就开始以顺时针方向转动,一直到离开喷嘴。有的地方曾研究将加水润湿的拌合料在30厘米距离内旋转360°。就得出在水环之后15厘米处。

摘要：0引言.本文采用平均场稳定性理论(MFST)对混流式水轮机尾水管内旋转涡带(PVC)的发生进行了预测。MFST是基于端流平均场的线性稳定性分析。最近的研究表明,MFST非常准确地预测了流剪切流(如PVC)中相干结构的形成。MFST可以进一步揭示最易受流动激励的流动区域,从而抑制PVC,这具有重要的实际意义。在本项工作中,MFST伴随着一种基于逐点壁面压力测量的数据驱动方法来预测PVC的线性增长率。该方法基于对极限环PVC幅值概率密度函数的统计评估。它利用了湍流背景引起的强烈噪声,这被认为是产生水动力不稳定性的主要原因。将实证结果和分析结果与不同工况下在尾水管内进行的锁相LDV测量结果进行比较,以评估该方法的定量准确性。本工作中概述的方法将对未来设计水轮机宽负荷稳定运行具有指导性。

摘要：Onewheel单轮电动滑板车这款造价1300美元、名为Onewheel的新发明，拥有一个从高卡车上获得的充气轮胎，时速可达193km，能在板距内旋转360°．并采用智能手机使用的运动传感技术实现自我平衡。研制这款滑板的公司FutureMotion称，

摘要：鼎御J1020-01指纹防盗锁,携广东"省长杯"工业设计奖的光芒横空出世,吸引诸多时尚家装设计名师的追捧。该款产品整体感觉线条简单流畅,尽管功能很多,但没有很繁琐眼花缭乱的感觉。滑盖设计,时尚典雅,大气,整体设计和谐自然。该产品有三种开门方式:指纹、密码和钥匙,并且具备八种功能:光学指纹输入功能、密码输入功能、机械钥匙功能、LCM液晶功能、上提把手反锁功能、外接电源功能、门内旋转反锁功能、数据下载及清空功能。按键壳体采用PC材料制作。

摘要：作为一款以时尚外观为卖点的便携耳机，宾果B530在强调机身轻巧的同时还提供了六种耳壳颜色．以满足年轻用户的多元化需求。该耳机采用旋转式耳罩设计．可向内旋转90°，