The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
An acoustic prism for asymmetric transmissions is proposed, designed, and fabricated by an anisotropic metamaterial composed of an array of controllable C‐shaped meta‐atoms. Due to the anisotropic configuration of the meta‐atom, the effective refractive index of the prism can be continuously tuned by rotating the meta‐atom. It is demonstrated that the transmitted wave direction of an incident acoustic...
The amplitude of ultrasonic will occur some attenuation when it traveled in liquids. And the ultrasonic attenuation with different frequency in the liquid is not same. In this paper, two experiments are designed to research how the amplitude of the ultrasonic will change with different frequencies of ultrasonic traveling in the water. And we find that the ultrasonic attenuation with different frequency...
A novel actuator-driven powder transport system is proposed in this paper. It has two sets of piezoelectric ceramic stacks whose vibrations couple together and make the powder transport pipe do elliptical vibration. The powder on the pipe wall can be thrown up, leading to the relative motions between the powder and pipe wall and thus the powder is transported. To get higher transport efficiency and...
Special specimen was designed to study the morphology change of SnAgCu solder under the influence of electromigration (EM) alone. High current stressing was applied to the specimens so that EM of solder would happen at both room and high temperatures. The interfacial crack at cathode is the main failure mode, although the positions of crack maybe different under different temperatures. Localized hillocks...
Special specimen was designed to study the morphology change of SnAgCu solder under the influence of electromigration (EM) alone. High current stressing was applied to the specimens so that EM of solder would happen at both room and high temperatures. The interfacial crack at cathode is the main failure mode, although the positions of crack maybe different under different temperatures. Localized hillocks...
The numerical calculation and analysis for the coupling of vibration and interior sound field of a resistance cab has been carried out by using the FEM and the acoustic analysis software. This paper introduces the specific steps of the method of vibration's modal analysis and the method of harmonic response analysis. Through calculation and analysis, get wainscot thickness which has the influence...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.