Results 11 to 20 of about 1,500,319 (282)
Mobile Device-Based Train Ride Comfort Measuring System
Applied Sciences, 2022 As an important train performance quality, comfort depends on vibration and noise data measured on a running train. Traditional vibration and noise measurement tools are facing challenges in terms of collecting big data, portability, and cost.
Yuwei Hu +4 more
doaj +1 more source
Use of mathematical models and computer software for analysis of traffic noise
Open Engineering, 2020 Noise measurement and evaluation of the existing noise situation is carried out in the vicinity of selected roads to demonstrate the need for the design of anti-noise measures or to assess the effectiveness of the measures.
Fedorko Gabriel +3 more
doaj +1 more source
Locking Local Oscillator Phase to the Atomic Phase via Weak Measurement [PDF]
, 2012 We propose a new method to reduce the frequency noise of a Local Oscillator (LO) to the level of white phase noise by maintaining (not destroying by projective measurement) the coherence of the ensemble pseudo-spin of atoms over many measurement cycles ...
Dehmelt H +6 more
core +1 more source
Mixed state discrimination using optimal control [PDF]
, 2009 We present theory and experiment for the task of discriminating two nonorthogonal states, given multiple copies. We implement several local measurement schemes, on both pure states and states mixed by depolarizing noise.
A. C. Doherty +9 more
core +2 more sources
Design of a beamforming-based antenna for detecting environmental noise in a city framework
Measurement: Sensors, 2021 The noise magnitude should be drastically limited in any city whatever its source, namely car/train/aircraft traffic, industrial activities, and leisure. The nose pollution has a significant impact on human activities especially for health.
John P. Djungha Okitadiowo +3 more
doaj +1 more source
An Efficient Cross-Correlation Method for a Digital Phase Noise Measurement System [PDF]
Journal of Electromagnetic Engineering and Science, 2022 In this paper, we propose a digital phase noise measurement using a 10-bit digital oscilloscope MXR608A from Keysight Technologies. The digital oscilloscope’s four channel data are used for digital phase noise measurement: two channels are assigned for ...
Kyung-Whan Yeom, Jin-Seong Roh
doaj +1 more source
A MEMS viscometer for unadulterated human blood [PDF]
, 2010 The design and theoretical modelling of an oscillating micro-mechanical-viscometer designed for the measurement of whole unadulterated human blood, is described. The proposed device utilises the dependence of the squeeze-film damping ratio on properties
Andrews +35 more
core +1 more source
Study on vibration and noise influence for optimization of garden mower
Nonlinear Engineering, 2021 Advancement in engineering provides various improvement in quality life while taking consideration of important factors for safety and environment. The use of mower food maintenance of land it is very common across several parts of the world with some ...
Chen Yimin +4 more
doaj +1 more source
Probability of occurrence of health and safety risks on scaffolding caused by noise exposure
Journal of Civil Engineering and Management, 2018 The paper presents the results of measurements for one hundred and ten scaffolds located in five cities in different parts of Poland. Measurements were made between April of 2016 and October of 2017. The environmental tests performed on scaffoldings were
Marek Jabłoński +2 more
doaj +1 more source
Applied Sciences, 2021 After five decades of development, mode-locked lasers have become significant building blocks for many optical systems in scientific research, industry, and biomedicine.
Haochen Tian, Youjian Song, Minglie Hu
doaj +1 more source