搜索结果: 31-45 共查到“国际动态 力学”相关记录142条 . 查询时间(0.395 秒)
An Evolving Sticky Situation
Evolving Sticky Situation
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2017/10/26
Travis Hagey, Michigan State University evolutionary biologist, shows how different groups of lizards – geckos and anoles – took two completely different evolutionary paths to developing the beneficia...
Clever experiment documents multi-scale fluid dynamics（图）
Clever experiment documents multi-scale fluid dynamics
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2017/9/4
University of Chicago physicists working in the nascent field of experimental vortex dynamics have, with unexpected help from a Sharpie marker, achieved the first measurements of an elusive but fundam...
印度建成并调试世界第三大高超声速风洞
印度 建成并调试 世界第三大 高超声速风洞
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2017/5/15
继中国和美国之后，印度建成世界第三大高超声速风洞。由印度空间研究组织ISRO建造的高超声速风洞近日在维克拉姆-萨拉巴伊航天中心VSSC启动并运行调试。该风洞以ISRO前主席萨什·德霍万Satish Dhawan命名，由印度自主设计和研发制造。该风洞实验装置将为印度航天航空运载系统的设计和研发提供必要的空气动力学科学试验数据。
美国引力波探测器重新启动
LIGO的激光器 电子设备
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2017/2/15
在经过一年多的系统升级后，美国激光干涉引力波天文台（LIGO）于2016年底重新启动。此次升级中，科学家对LIGO的激光器、电子设备以及光学设备进行了升级，使得探测器的灵敏度提升了10-25%。科学家希望LIGO能够探测到宇宙深处发出的引力波以及其它宇宙极端现象。
乌克兰开发煤矿气体动力学分析有效方法
乌克兰 煤层 气体动力学 科学家
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2017/1/11
乌克兰国家科学院地质研究所通过对煤层中危险区域和运营矿山采空区域的地质和地球化学论证研究，建立了煤矿气体动力学地质和地球化学特征科学分析体系。该研究所通过对煤层（或采空层区域）采空层面积取样确定气体混合物的质量构成，根据所获取数据，建立不饱和、饱和和重烃类气体最大气体饱和度的局部区域预报图。在此基础上，进一步确定未来采矿工作类型，判定煤层和采空区脱气是否在安全区域。
The Pop-Up Effect:Why Buoyant Spheres Don’t Always Leap Out of the Water
Buoyant Spheres Leap Out of the Water
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2016/11/29
It’s a common swimming pool game: Force a buoyant ball underwater and let it go. The ball springs to the surface and jumps into the air. But, submerge the ball deeper underwater and the effect is ofte...
Theorists smooth the way to modeling quantum friction
Theorists smooth the way quantum friction
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2016/5/19
Theoretical chemists at Princeton University have pioneered a strategy for modeling quantum friction, or how a particle’s environment drags on it, a vexing problem in quantum mechanics since the birth...
In tuning friction to the point where it disappears,technique could boost development of nanomachines
tuning friction to the point disappears nanomachines
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2015/6/18
Friction is all around us, working against the motion of tires on pavement, the scrawl of a pen across paper, and even the flow of proteins through the bloodstream. Whenever two surfaces come in conta...
Physicists predict Fano resonance in lead-free relaxors（图）
lead-free relaxors Physicists
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2014/12/1
FAYETTEVILLE, Ark. – An international team of scientists predicts that a phenomenon known in physics as Fano resonance can exist in materials that are used in electronic devices.