Results 71 to 80 of about 68,215 (317)
Applied Sciences, 2019 The high-speed-train pantograph is a complex structure that consists of different rod-shaped and rectangular surfaces. Flow phenomena around the pantograph are complicated and can cause a large proportion of aerodynamic noise, which is one of the main ...
Yongfang Yao +4 more
doaj +1 more source
A review of aerodynamic noise from propellers, rotors, and lift fans [PDF]
Hand calculation procedures for predicting aerodynamic noise from propellers, rotors, and lift ...
Kurtz, D. W., Marte, J. E.
core +1 more source
Advanced Functional Materials, EarlyView.There is a significant need for biomaterials with well‐defined stability and bioactivity to support tissue regeneration. In this study, we developed a tunable microgel platform that enables the decoupling of stiffness from porosity, thereby promoting bone regeneration.
Silvia Pravato +9 more
wiley +1 more source
MULTI-OBJECTIVE OPTIMIZATION DESIGN OF MW WIND TURBINE AIRFOILS
Jixie qiangdu, 2020 With the development of wind power generation technology,the requirements for various performances of wind turbines are higher. Aerodynamic noise problem has become a key research direction of the wind power industry.
LI YingJue, WEI KeXiang, ZHOU Zhou
doaj
Complexity, 2018 Pantographs are important devices on high-speed trains. When a train runs at a high speed, concave and convex parts of the train cause serious airflow disturbances and result in flow separation, eddy shedding, and breakdown. A strong fluctuation pressure
Xiaoqi Sun, Han Xiao
doaj +1 more source
Investigation to define the propagation characteristics of a finite amplitude acoustic pressure wave Final report [PDF]
Aerodynamic noise generation by finite amplitude pressure wave propagation through entropy producing ...
Cottrell, J. W., Peter, A. C.
core +1 more source
MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance
Advanced Functional Materials, EarlyView.Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley +1 more source
Aerodynamic Noise Separation of an EMU Trailer Bogie Area Using Train Operation Tests
Shock and Vibration, 2018 The operation transfer path analysis (OTPA) technique was used to measure the vibration and noise transfer coefficient functions of wheel-rail noise and radiated noise from an electric multiple unit (EMU) train (high-speed train in China) trailer bogie ...
Leiming Song, Hao Chen, Baochuan Li
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Spectral techniques in jet noise theory [PDF]
Spectral analysis techniques applied to Lighthill aerodynamic sound equation for unified jet noise ...
Lowson, M. V., Pao, S. P.
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In Situ Study of Resistive Switching in a Nitride‐Based Memristive Device
Advanced Functional Materials, EarlyView.In situ TEM biasing experiment demonstrates the volatile I‐V characteristic of MIM lamella device. In situ STEM‐EELS Ti L2/L3 ratio maps provide direct evidence of the oxygen vacancies migrations under positive/negative electrical bias, which is critical for revealing the RS mechanism for the MIM lamella device.
Di Zhang +19 more
wiley +1 more source