共查询到20条相似文献,搜索用时 15 毫秒
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Brivio Eleonora Serino Silvia Negro Cousa Erica Zini Andrea Riva Giuseppe De Leo Gianluca 《Virtual Reality》2021,25(2):303-311
Virtual Reality - Recently, 360° panorama technologies have been used to create videos and pictures of real and virtual environments, thus opening new possibilities for psychological research.... 相似文献
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《Computers & Structures》1986,22(1):39-52
Two types of locking are identified in linear field C° elements: locking caused by shear resistance in constant curvature deformation and in linear curvature deformation, respectively. Locking of the first type can be ameliorated by decoupling constant curvature bending from shear, which in some elements can be achieved by selective reduced integration. Once the modes are decoupled, a scaling factor on the shear stiffness can be used to alleviate the second type of locking. These findings are explained in terms of a linear displacement, linear rotation beam element and applied to the improvement of a triangular plate element. It is shown that the resulting triangular plate element is free from locking and performs excellently in a wide variety of problems. 相似文献
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《Calphad》2021
The ternary phase diagram La-Ni-Fe was studied using X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). Three isothermal sections, at 750, 600 and 500 °C were constructed covering the whole concentration range. In addition, vertical sections at 15 and 35 at.% La were evaluated based on the abovementioned methods and DTA analysis. Among binary compounds, LaNi5, La5Ni19 and La2Ni7 have the widest homogeneity regions. The LaNi5 phase dissolves 19.9, 19.6 and 19.4 at.% Fe at 750, 600 and 500 °C, respectively. The solubility of Fe in La5Ni19 is 14.5, 12.1 and 8.9 at.% at 750, 600 and 500 °C, respectively. For the La2Ni7 phase, the Fe-solubility was found to be 13.9, 11.3 and 10.1 at.% at 750, 600 and 500 °C, respectively. The homogeneity regions of the remaining phases are much smaller. The character of phase equilibria at 750 °C in the Ni-rich region is similar to those at solidus temperature. The character of the phase equilibria at 600 and 500 °C, however, differs from those at higher temperatures. In particular, the equilibrium (γFe,Ni) + La5Ni19 which is present in the La-Ni-Fe system at solidus temperature and 750 °C, is absent at 600 and 500 °C. Instead, the alternative equilibrium LaNi5 + La2Ni7 is present at 600 °C. Furthermore, the equilibrium La2Ni7 + La2Ni3 which is present at solidus temperature, is replaced by the alternative equilibrium (αFe) + La7Ni16 at lower temperatures. 相似文献
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A. Pietruczuk J. Jarosławski J. Podgórski P. Sobolewski J. Wink 《International journal of remote sensing》2013,34(15):3981-3986
Eruption of Eyjafjallajökull volcano took place on 13–14 April 2010, and created an ash cloud moving towards densely populated areas in Europe. Dispersion models show that the cloud appeared over Poland at noon on 16 April. Measurements of optical properties of the atmospheric aerosols by the Cimel Sun Photometer (optical thickness and volume size distribution) and lidar (backscatter coefficient) at Belsk (52° N, 21° E) for the period 15–26 April 2010 are examined to find volcanic ash in the atmosphere over the site. Thin aerosol clouds, linked to the volcanic eruption, were found below 5 km, and their optical thickness (at 500 nm) varied only slightly in the range of a few hundredths. The optical depth of the aerosol clouds in the 5–7.5 km layer was less than 0.01. 相似文献
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本文采用两片常用集成电路组成一个可控硅线性触发器,移相范围为0°~180°。具有结构简单,成本低廉等优点。 相似文献
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《软件世界》1997,(10)
Formanyyears,computersciencehasbeenstrainingattheboundsofthecomputer,hopingforalanguage,atechnique,asysternthatwouldtranscendtherigidboundsofthepurelyprocedural.Allofthoseattemptshavefailed,toagreaterorlesserdegree.Yetnow,withoutintendingit,weperhapsfindourselvesimperceptiblyoverthatedge.Thereisnosinglewatershedevent,butwehaveneverthelesscrossedfromonecomputingeraintoanother.TwoMicrosoftonlineencyclopedias,EncartaandCinemania,standoneithersideofacontinentaldivideinelectronicpublishing.Bothma… 相似文献
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This article presents a study of the seasonal variability of the rate of change of total ozone column (TOC) and the rate of change of surface relative humidity (RH) over Dum Dum (22° 38′ N, 88° 26′ E) during different seasons of the period 1997–2005. The rate of formation of TOC was a maximum during the pre-monsoon and winter seasons and the rate of decrease of TOC was a maximum during the monsoon and post-monsoon seasons throughout the period of study. The rate of increase of surface RH was a maximum in the pre-monsoon season and the rate decreased during the other seasons. At the monsoon and post-monsoon seasons the rate of decrease of TOC increased with the rate of decrease of surface RH. 相似文献
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《电脑自做》2004,(12):125-126
一、INTEL CAG规范详解-很早以前就已出现近来留心机箱市场的朋友不难发现,越来越多的新品机箱都宣称自己符合什么CAG1.1规范或者TAC1.1规范甚至做到了38度概念。这么多名词要么不来一来就是三个,这下子可给消费者弄了个头晕脑胀。那么这三者到底都是什么意思,它们之间又有什么关系呢?下面,就让我们来为您注意进行一个解释。首先,让我们了解一下CAG。CAG的英文全称为Chassis Air Guide,是INTEL对于机箱内部散热设计的指南。随着新一代处理器、芯片组以及显示卡在运算速度上的提高,对应的发热量也是突飞猛进,为了给这些高发热量配件进行良好的散热各个厂家纷纷给它们安装上了散热风扇。但是,无论风扇对这些配件的帮助有多大它们都是封闭在一 相似文献
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澳大利亚是一个利润丰厚、回报稳定的市场。澳大利亚客商对产品品质要求很高,如果企业的产品品质一直有保证,生意做顺了,抓住一个客户,想丢都丢不掉。 相似文献
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Chheang Vuthea Jeong Sangkwon Lee Gookhwan Ha Jong-Sung Yoo Kwan-Hee 《The Journal of supercomputing》2020,76(7):5655-5677
The Journal of Supercomputing - This paper is concerned with techniques for directly embedding moving objects in the real world into 360° virtual reality scenes captured by 360° camera,... 相似文献
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黄仁贵 《A&S:安防工程商》2014,(3):60-61
全景摄像机由鱼眼镜头来实现360°监控;也可通过多镜头实现全景守护。本期所测试的3款全景摄像机,都采用了鱼眼镜头,那么他们又有哪些令人惊叹的地方呢?下面让小编给大家总结一下。 相似文献
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去过八达岭长城的朋友很多都看过那里的360度全景电影,登录过故宫博物院网站的朋友很多都看过紫禁城的360度全景图……这种360度全景的东西能够完整地展现物体的全貌。如果你对这类全景的东西感兴趣,不妨随笔者一起用3DVista Flash VT Exporter来制作一幅360度的全景图。 相似文献
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