Results 91 to 100 of about 54,520 (298)

Development of a pulsation dampener for hydraulic systems of power plants

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2019
The article considers the development of a capacitance-type pressure pulsation dampener. The pressure pulsation dampener is used to reduce the noise of hydraulic systems which are subject to increased requirements for vibro-acoustic characteristics.
A. N. Kryuchkov, M. A. Еrmilov, E. N. Еrmilova, I. V. Balakhonov, A. N. Vidyaskina   +4 more
doaj   +1 more source

Oscillatory convective modes in red giants: a possible explanation of the long secondary periods

, 2015
We discuss properties of oscillatory convective modes in low-mass red giants, and compare them with observed properties of the long secondary periods (LSPs) of semi-regular red giant variables.
Ita, Yoshifusa, Saio, Hideyuki, Takayama, Masaki, Wood, Peter R.   +3 more
core   +1 more source

Photoactivation of NV Centers in Diamond via Continuous Wave Laser Illumination of Shallow As‐Implanted Nitrogen

Advanced Functional Materials, EarlyView.
This study demonstrates an alternative method of creating charge‐stable negatively charged nitrogen vacancy (NV−) centers close to the diamond surface without high‐temperature annealing. By illuminating nitrogen‐implanted regions with a continuous‐wave 405 nm laser, NV− centers are induced, exhibiting electron spin coherence properties suitable for ...
Jens Fuhrmann, Christoph Findler, Michael Olney‐Fraser, Lev Kazak, Fedor Jelezko   +4 more
wiley   +1 more source

Experimental Investigation of the Characteristics of Discharge Pressure Pulsation in a Twin-Screw Refrigeration Compressor

Zhileng xuebao
To explore the characteristics of pressure pulsation in a twin-screw refrigeration compressor, transient pressures during the suction, compression, and discharge phases were measured, and the pressure pulsation characteristics were subsequently analyzed.
Sun Shizhong, Zhou Minglong, Chen Wenqing, Wang Chuang, Xing Ziwen, Su Po Chia   +5 more
doaj  

The low frequency pressure pulsation and control of the open-jet wind tunnel. [PDF]

Sci Rep, 2022
Hu X, Luo Y, Leng J, Guo P, Yu T, Wang J.   +5 more
europepmc   +1 more source

Pulsation Control in Pressure Metering Systems

Journal of Low Frequency Noise, Vibration and Active Control, 1994
Reliable pressure measurement in pulsating flow conditions is difficult. When an orifice meter is used, two significant errors can arise: the square root error, which is inherent to orifice plates, and the pressure distortion generated in the sensing lines and DP transmitter.
openaire   +1 more source

Cu‐Based MOF/TiO2 Composite Nanomaterials for Photocatalytic Hydrogen Generation and the Role of Copper

Advanced Functional Materials, EarlyView.
HKUST‐1/TiO2 composite materials show a very high photocatalytic hydrogen evolution rate which increases as a function of the irradiation time until reaching a plateau and even surpasses the performance of the 1%Pt/TiO2 material after three photocatalytic cycles.
Alisha Khan, Marie Le Pivert, Alireza Ranjbari, Diana Dragoe, Daniel Bahena‐Uribe, Christophe Colbeau‐Justin, Christian Herrero, Dorota Rutkowska‐Zbik, Johnny Deschamps, Hynd Remita   +9 more
wiley   +1 more source

Analysis of pressure pulsation and energy characteristics of guide vane for axial flow pump based on Hilbert-Huang transform considering impeller-guide vane interaction. [PDF]

Sci Prog, 2023
Lin Z, Yang F, Ding P, Teng J, Yuan Y, Jin Y.   +5 more
europepmc   +1 more source

The Stability of Massive Main Sequence Stars as a Function of Metallicity

, 2012
We investigate the pulsational stability of massive (M >~ 120 Msun) main sequence stars of a range of metallicities, including primordial, Population III stars.
Arras, Phil, Quataert, Eliot, Shiode, Joshua H.   +2 more
core   +1 more source

Copper‐based Materials for Photo and Electrocatalytic Process: Advancing Renewable Energy and Environmental Applications

Advanced Functional Materials, EarlyView.
Cu‐based catalysts as a cornerstone in advancing sustainable energy technologies are fully reviewed in this manuscript, highlighting their potential in photo‐ and electrocatalysis. It includes metallic copper, copper oxides, copper sulfides, copper halide perovskites, copper‐based metal–organic frameworks (MOFs), and covalent organic frameworks (COFs),
Jéssica C. de Almeida, Yanjie Wang, Thais A. Rodrigues, Paulo H. H. Nunes, Vagner R. de Mendonça, Paulo H. E. Falsetti, Leticia V. Savazi, Tao He, Alexandra V. Bardakova, Aida V. Rudakova, Jie Tian, Alexei V. Emeline, Osmando F. Lopes, Antonio Otavio T. Patrocínio, Jia Hong Pan, Caue Ribeiro, Detlef W. Bahnemann   +16 more
wiley   +1 more source