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Ehlers-Danlos综合征1例 被引量:2
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作者 黄岚 方丽 《临床皮肤科杂志》 CAS CSCD 北大核心 1998年第3期191-192,共2页
报告1例Ehlers-Danlos综合征。患者男性,14岁。其临床特征为皮肤弹性增加,关节活动过度,皮肤血管脆性增加,此外尚伴有指甲。
关键词 弹力过度性 EHLERS-DANLOS 综合征 皮肤
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The Pressure Gradient Elastic Wave: Energy Transfer Process for Compressible Fluids with Pressure Gradient 被引量:1
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作者 Yan Beliavsky 《Journal of Mechanics Engineering and Automation》 2013年第1期53-64,共12页
The temperature separation was discovered inside the short vortex chamber (H/D = 0.18). Experiments revealed that the highest temperature of the periphery was 465 ℃, and the lowest temperature of the central zone w... The temperature separation was discovered inside the short vortex chamber (H/D = 0.18). Experiments revealed that the highest temperature of the periphery was 465 ℃, and the lowest temperature of the central zone was -45 ℃ (the compressed air was pumped into the chamber at room temperature). The objective of this paper is to proof that this temperature separation effect cannot be explained by conventional heat transfer processes. To explain this phenomenon, the concept of PGEW (Pressure Gradient Elastic Waves) is proposed. PGEW are kind of elastic waves, which operate in compressible fluids with pressure gradients and density fluctuations. The result of PGEW propagation is a heat transfer from area of low pressure to high pressure zone. The physical model of a gas in a strong field of mass forces is proposed to substantiate the PGEW existence. This physical model is intended for the construction of a theory of PGEW. Understanding the processes associated with the PGEW permits the possibility of creating new devices for energy saving and low potential heat utilization, which have unique properties. 展开更多
关键词 PGEW (Pressure Gradient Elastic Waves) temperature separation Ranque effect vortex chamber heat transfer energysaving low potential heat utilization.
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