Results 21 to 30 of about 1,908,810 (282)

Determination of Meteor Vector Velocity Using MU Interferometry Measurements of Head Echoes

Remote Sensing, 2023
A new method for measuring the vector velocity of meteoroids using meteor head echoes is proposed in this study. The lateral velocity is determined by utilizing the phase interference measurement between channels, while the radial velocity is obtained ...
Xin Xie, Zhangyou Chen, Li Wang, Heng Zhou, Xiongbin Wu   +4 more
doaj   +1 more source

Measurement of properties of a dispersed phase in air-water multiphase flow using novel four-sensor probe and orthogonal high speed cameras [PDF]

Measurement of the volumetric flow rate of each of the flowing components in multiphase flow is required to be monitored in production logging applications.
Pradhan, Suman, Mishra, Rakesh
core   +3 more sources

Measurement of Bubble Velocity Vectors in Bubbly Air Water Multiphase Flow [PDF]

Measurement of the volumetric flow rate of each of the flowing components in multiphase flow is often required and this is particularly true in Production Logging applications.
Pradhan, Suman
core   +4 more sources

Synthesis of optimal motion control of a guided aircraft on a maneuvering space object [PDF]

Космические аппараты и технологии
The deployment of U.S. weapons in space reduces the flight time of weapons to important strategic ground and space objects, which in turn significantly limits the ability to counter threats and retaliate with domestic strategic nuclear and non-nuclear ...
Kozev S. G., Ponomarev Yu. A., Pyatkov V. V., Golovachev A. S., Tolmachev A. A.   +4 more
doaj   +1 more source

ТЕХНОЛОГИЯ VELOCITY VECTOR IMAGING И СТАНДАРТНОЕ ЭХОКАРДИОГРАФИЧЕСКОЕ ИССЛЕДОВАНИЕ В ОЦЕНКЕ МИОКАРДА ЛЕВОГО ЖЕЛУДОЧКА ПРИ ИНФАРКТЕ БЕЗ ПАТОЛОГИЧЕСКОГО ЗУБЦА Q

, 2020
The purpose of the study was to assess the function of fibres of the left ventricle (LV) and its dynamics after revascularization in patients with non Q myocardial infarction using standard Echocardiography (EchoCG) and Velocity Vector Imaging (VVI ...
A. Yu. Vasilyev, А. Ю. Васильев, E. B. Petrova, Е. Б. Петрова   +3 more
core   +1 more source

ФУНКЦИЯ ВОЛОКОН ЛЕВОГО ЖЕЛУДОЧКА И ЕЕ ДИНАМИКА ПОСЛЕ РЕВАСКУЛЯРИЗАЦИИ В ЗАВИСИМОСТИ ОТ ДАВНОСТИ ПЕРЕНЕСЕННОГО ИНФАРКТА ПРИ ИСПОЛЬЗОВАНИИ ТЕХНОЛОГИИ VELOCITY VECTOR IMAGING

, 2020
Indicators of function of fibers of the left ventricle (LV) are strain (S) and strain rate (SR). The aim: To evaluate the function of fibers of the LV and its dynamics after surgical revascularization, depending on the remoteness of a myocardial ...
Марина Вадимовна Федорова, Евгений Борисович Шахов, E. B. Shakhov, M. V. Fedorova, E. B. Petrova, Екатерина Борисовна Петрова   +5 more
core   +1 more source

A Low Frequency Noise Source Localization and Identification Method Based on a Virtual Open Spherical Vector Microphone Array

Applied Sciences, 2023
Aiming at the problem of poor spatial resolution of low-frequency noise sources in a small-aperture spherical microphone array (SMA), this paper proposes a method for localizing and identifying low-frequency noise sources based on virtual-vector open SMA
Boquan Yang, Yuan Gao, Qiang Guo, Shengguo Shi   +3 more
doaj   +1 more source

An Improved In-Motion Coarse Alignment Method for SINS/GPS Integration with Initial Velocity Error Suppression

Sensors, 2023
The integrated system with the strapdown inertial navigation system (SINS) and the global positioning system (GPS) is the most popular navigation mode. It has been used in many navigation fields.
Yukun Wang, Xiuli Ning, Xiang Xu
doaj   +1 more source

Vector Current Measurement Using Doppler Scatterometry with Optimally Selected Observation Azimuths

Remote Sensing, 2021
The Doppler scatterometer is a new style of remote sensing tool that can provide current measurements over a wide swath for rapid global coverage. The existing current estimation method for Doppler scatterometry uses the maximum likelihood method to ...
Weifeng Sun, Qing Wang, Weimin Huang, Chenqing Fan, Yongshou Dai   +4 more
doaj   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source