Results 21 to 30 of about 3,511 (220)

Multi-Mode Total Focusing Method (MTFM) to Detect High-Temperature Hydrogen Attack (HTHA) – A Review

Journal of Materials Exploration and Findings, 2023
High temperature hydrogen attack (HTHA) is a commonly observed harm component in carbon steels exposed to high temperature and pressure in a hydrogen-rich environment. Hydrogen together with carbon responds to produce methane.
Anjar Oktikawati, Rini Riastuti, Nursidi Yuanto   +2 more
doaj   +1 more source

Rhodium colloidal suspension deposition on porous silica particles by dry impregnation: Study of the influence of the reaction conditions on nanoparticles location and dispersion and catalytic reactivity [PDF]

, 2009
Rhodium composite nanomaterials were synthesized by an innovating process called dry impregnation in a fluidized bed. It consists in spraying an aqueous colloidal suspension of rhodium on silica porous particles.
Barthe, Laurie, Chaudret, Bruno, Denicourt-Nowicki, Audrey, Hemati, Mehrdji, Philippot, Karine, Roucoux, Alain   +5 more
core   +4 more sources

Large‐scale system identification using self‐adaptive penguin search algorithm

IET Control Theory &Applications, Volume 17, Issue 17, Page 2292-2303, November 2023., 2023
This research addresses the non‐linear large‐scale system identification problem under the consideration of two systems: bilinear system and Volterra system as the large‐scale system identification. This work proposes a novel algorithm, called Self Adaptive Penguin Search Optimization (SAPeSO), to attain the system characteristics properly and minimize
Karthikeyan Udaichi, Ravi Chinaveer Nagappan, Miguel Garcia‐Torres, Parameshchari Bidare Divakarachari, Shankar Nayak Bhukya   +4 more
wiley   +1 more source

Identification of nonregular indication according to change of grain size/surface geometry in nuclear power plant (NPP) reactor vessel (RV)-upper head alloy 690 penetration

Nuclear Engineering and Technology, 2017
During the fabrication process of reactor vessel head penetration (RVHP), the grain size of the tube material can be changed by hot or cold work and the inner side of the tube can also be shrunk due to welding outside of the tube. Several nonregular time-
Kyungcho Kim, Changkuen Kim, Hunhee Kim, Hak-Joon Kim, Jin-Gyum Kim, Myungjo Jhung   +5 more
doaj   +1 more source

Equivalent flaw time-of-flight diffraction sizing with ultrasonic phased arrays [PDF]

, 2012
Ultrasonic phased array transducers can be used to extend traditional time-of-flight diffraction (TOFD) crack sizing, resulting in more quantitative information about the crack being obtained.
Engle, Brady J., Schmerr, Lester W., Jr., Sedov, Alexander   +2 more
core   +3 more sources

Alleviated WRF Summer Wet Bias Over the Tibetan Plateau Using a New Cloud Macrophysics Scheme

Journal of Advances in Modeling Earth Systems, Volume 15, Issue 10, October 2023., 2023
Abstract Reliable precipitation simulation over the Tibetan Plateau (TP) remains a challenge, manifested by a prominent systematic wet bias in the warm season. Previous studies have generally neglected the potential linkage between surface radiation energy budget and precipitation bias.
Dingchi Zhao, Yanluan Lin, Wenhao Dong, Yi Qin, Wenchao Chu, Kun Yang, Husi Letu, Lei Huang   +7 more
wiley   +1 more source

Development of HOIS guidance for ultrasonic NDT for non-intrusive inspection at elevated temperatures

e-Journal of Nondestructive Testing, 2023
The non-intrusive inspection (NII) of pressure vessels using external in-service ultrasonic NDT has multiple advantages compared to internal visual inspection, including the significant reduction of down-time related costs and safety benefits from ...
Helen Peramatzis, Steve Burch
doaj   +1 more source

A turbulent orographic form drag scheme accounting for anisotropy and orientation for kilometer‐ to subkilometer‐scale models

Quarterly Journal of the Royal Meteorological Society, Volume 149, Issue 755, Page 2527-2549, July 2023 Part B., 2023
Abbreviations: LES, large‐eddy simulation; NWP, numerical weather prediction; SRTM, Shuttle Radar Topography Mission data; TOFD, turbulent orographic form drag. Abstract This paper presents a turbulent orographic form drag (TOFD) parameterization scheme that takes into account the directional effects stemming from the angle between the low‐level wind ...
Haile Xue, Xueshun Shen
wiley   +1 more source

Overview of the Application of Orographic Data in Numerical Weather Prediction in Complex Orographic Areas

Advances in Meteorology, Volume 2022, Issue 1, 2022., 2022
Complex orography is still a big challenge for all numerical weather prediction (NWP) models. Orography is an important factor that affects the NWP results. The orography in NWP mainly affects the main accuracy of the results through two aspects: orographic representation in models dynamics and orography‐related parameterization schemes in the physical
Yingjie Wang, Jianping Wu, Feng Chen
wiley   +1 more source

Recent modelling advances for ultrasonic TOFD inspections

AIP Conference Proceedings, 2015
The ultrasonic TOFD (Time of Flight Diffraction) Technique is commonly used to detect and characterize disoriented cracks using their edge diffraction echoes. An overview of the models integrated in the CIVA software platform and devoted to TOFD simulation is presented.
Darmon, Michel, Ferrand, Adrien, Dorval, Vincent, Chatillon, Sylvain, Lonne, Sebastien   +4 more
openaire   +2 more sources