Results 221 to 230 of about 7,859,011 (428)

Achieving High Damping Capacity in Oxygen‐Enhanced BCC Zr‐Hf‐Ti‐Nb Multi‐Principal‐Element Alloys with Low Young's Modulus

open access: yesAdvanced Science, EarlyView.
A series of oxygen‐enhanced Zr‐Hf‐Ti‐Nb MPEAs with high strength and outstanding damping capacity are developed through tailoring the BCC structural stability by an elaborate composition regulation. Strengthening mechanism for high strength and damping mechanism related to various Snoek‐type relaxations reveals that the existence of multiple separate O‐
Qing Wang   +10 more
wiley   +1 more source

High‐Gain PMMA‐Modified Graphene Photodetectors for Dual‐Wavelength Secure Communication Utilizing Distinct Temporal Photoresponses

open access: yesAdvanced Science, EarlyView.
The bipolar photoresponses with temporally distinguishable characteristics in a PMMA‐modified graphene photodetector are successfully achieved. Through systematic harnessing of these wavelength‐dependent temporal dynamics as encrypted and key signals, an effective encryption system for optical communication systems is developed.
Jinhua Wu   +5 more
wiley   +1 more source

URBAN PLANNING MANAGEMENT SYSTEM IN LOS ANGELES: AN OVERVIEW [PDF]

open access: yes
This paper gives an overview of the urban planning management system in Los Angeles, United States. This system consists of institutional subsystem, legal subsystem, operational subsystem, and technical subsystem.
Xueming Chen
core  

Multi‐Wavelength Achromatic 3D Meta‐holography with Zoom Function

open access: yesAdvanced Science, EarlyView.
Due to the wavelength mismatch, chromatic aberrations are inevitable in multi‐wavelength meta‐holography. Moreover, since the meta‐hologram is difficult to be refreshed, zoom meta‐holography has not been reported to date. This study proposes a multi‐wavelength achromatic 3D meta‐holography with a zoom function, breaking through both the chromatic ...
Chao Liu   +17 more
wiley   +1 more source

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