Results 21 to 30 of about 2,661 (250)

Application Research of the Sparse Representation of Eigenvector on the PD Positioning in the Transformer Oil

open access: yesInternational Journal of Antennas and Propagation, 2016
The partial discharge (PD) detection of electrical equipment is important for the safe operation of power system. The ultrasonic signal generated by the PD in the oil is a broadband signal.
Qing Xie   +6 more
doaj   +1 more source

Overview of Wind Parameters Sensing Methods and Framework of a Novel MCSPV Recombination Sensing Method for Wind Turbines

open access: yesEnergies, 2018
The paper presents an overview of the traditional methods to obtain wind parameters such as wind speed, wind direction and air density. After analyzing wind turbines’ arrangements and communication characteristics and the correlation of operation ...
Xiaojun Shen   +4 more
doaj   +1 more source

A Hybrid Reasoning Model for “Whole and Part” Cardinal Direction Relations [PDF]

open access: yes, 2013
We have shown how the nine tiles in the projection-based model for cardinal directions can be partitioned into sets based on horizontal and vertical constraints (called Horizontal and Vertical Constraints Model) in our previous papers (Kor and Bennett ...
Kor, A   +3 more
core   +1 more source

Experimental Design and Study of Micro-nano Wood Fiber Processed by Nanosecond Pulse Laser

open access: yesBioResources, 2016
A new processing technology using a nanosecond pulse laser to process micro-nano wood fiber is proposed in this paper. A test bench was designed and manufactured for the technology.
Chunmei Yang   +7 more
doaj   +1 more source

Systematic assignment of thermodynamic constraints in metabolic network models [PDF]

open access: yes, 2006
Background: The availability of genome sequences for many organisms enabled the reconstruction of several genome-scale metabolic network models. Currently, significant efforts are put into the automated reconstruction of such models.
Kümmel, Anne,   +12 more
core   +1 more source

A novel wideband DOA estimation method based on a fast sparse frame

open access: yesIET Communications, 2021
In this study, a novel fast wideband direction of arrival (DOA) estimation algorithm is proposed to reduce the computational complexity. First, a multiple measurement vector (MMV)‐based compact structure for a wideband signal is established.
Xiaoyu Zhang   +3 more
doaj   +1 more source

Modified side overlap esophagogastrostomy after laparoscopic proximal gastrectomy

open access: yesAnnals of Gastroenterological Surgery, 2022
We report a new method of esophagogastrostomy after proximal gastrectomy, side overlap with fundoplication by Yamashita (SOFY) in 2017. Recently, even better treatment results can be obtained by modifying the SOFY method.
Yoshito Yamashita   +4 more
doaj   +1 more source

Linear programming with a feasible direction interior point technique for smooth optimization

open access: yes, 2022
We propose an adaptation of the Feasible Direction Interior Points Algorithm (FDIPA) of J. Herskovits, for solving large-scale linear programs. At each step, the solution of two linear systems with the same coefficient matrix is determined.
Angélica Miluzca Victorio Celis   +1 more
core   +1 more source

Can echocardiographic particle image velocimetry correctly detect motion patterns as they occur in blood inside heart chambers? A validation study using moving phantoms

open access: yesCardiovascular Ultrasound, 2012
Aims To validate Echo Particle Image Velocimetry (PIV) Methods High fidelity string and rotating phantoms moving with different speed patterns were imaged with different high-end ultrasound systems at varying insonation angles and frame rates.
Prinz Christian   +7 more
doaj   +1 more source

Research Progress in Extraction and Application of Collagen Peptides

open access: yesShipin gongye ke-ji, 2022
My country is both a big country of livestock breeding and a big fishery country, and it has abundant resources such as animal bones, animal skins and fish bones, fish skins and fish scales. Collagen peptides are derived products obtained by enzymatic or
Xiaodong YANG   +10 more
doaj   +1 more source

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