Results 21 to 30 of about 670,649 (179)

Flame and Smoke Detection Algorithm Based on ODConvBS-YOLOv5s

IEEE Access, 2023
Real-time and accurate detection of flame and smoke is an important prerequisite to reduce the loss caused by fire. There are exists some problems in traditional detection algorithms of flame and smoke, such as low accuracy, high miss rate, low detection
Jingrun Ma, Zhengwei Zhang, Weien Xiao, Xinlei Zhang, Shaozhang Xiao   +4 more
doaj   +1 more source

A Review of Ignition Characteristics and Prediction Model of Combustor Under High-Altitude Conditions

Energies
High-altitude relight is a critical challenge for aero-engines, directly impacting the safety and emergency response capabilities of aircraft. This paper systematically reviews the physical mechanisms, key factors, and relevant prediction models of high ...
Yuhui Zhu, Shaolin Wang, Kaixing Wang, Yushuai Liu, Cunxi Liu, Fuqiang Liu, Jinhu Yang, Yong Mu, Gang Xu   +8 more
doaj   +1 more source

An optical investigation on arc shortening features and its impacts on ignition process with multiple discharging system

Case Studies in Thermal Engineering
Flame kernel generation is essential to the stability and efficiency of combustion in a spark engine. In this study, the initial process of flame kernel generation was studied in an optical spark engine. The engine was operated with the λ adjusted from 1.
Zhiqiang Li, Jing Qin, Yiqiang Pei, Qi Zhan, Yingbo Wang   +4 more
doaj   +1 more source

Development and Validation of a CFD Combustion Model for Natural Gas Engines Operating with Different Piston Bowls

Energies, 2023
Nowadays, an accurate and precise description of the combustion phase is essential in spark-ignition (SI) engines to drastically reduce pollutant and greenhouse gas (GHG) emissions and increase thermal efficiency.
Giovanni Gaetano Gianetti, Tommaso Lucchini, Gianluca D’Errico, Angelo Onorati, Patrik Soltic   +4 more
doaj   +1 more source

Oligosaccharides With Defined Glycosidic Bonds Shape Gut Microbial Succession and Metabolism Via Bond‐Specific Microbial Responders

Advanced Science, EarlyView.
Oligosaccharides with defined glycosidic bonds drive divergent gut microbial succession and shape unique metabolic profiles. Absolute time‐series profiling with Bayesian generalized Lotka–Volterra modeling identifies bond‐specific microbial responders, while monoculture validation and metaproteomics reveal linkage‐matched transport and cleavage modules.
Xiaoxuan Lu, Jiaqi Zou, Geng Han, Mengyao Zhao, Ting Luo, Xiangru Feng, Liangliang Zhu, Yijia Chen, Xiaoguo Ji, Jiayang Jin, Liming Zhao   +10 more
wiley   +1 more source

Experimental study on the effect of discharge parameters of high-frequency nSDBD on the multi-point ignition characteristics of NH3/air mixture

Case Studies in Thermal Engineering
Multi-point ignition by high-frequency nanosecond surface dielectric barrier discharge (nSDBD) offers the potential to enhance the combustion speed of NH3/air mixtures.
Jie Tian, Lu Wang, Yongqi Wang, Wei Yin, Yong Xiong, Yong Cheng   +5 more
doaj   +1 more source

Optical Investigation of a Partial Fuel Stratification Strategy to Stabilize Overall Lean Operation of a DISI Engine Fueled with Gasoline and E30

Energies, 2021
This paper offers new insights into a partial fuel stratification (PFS) combustion strategy that has proven to be effective at stabilizing overall lean combustion in direct injection spark ignition engines.
Cinzia Tornatore, Magnus Sjöberg
doaj   +1 more source

A Real‐Data‐Driven Framework for Evaluating Differential Transcript Usage Methods Across Long‐Read Bulk, Single‐Cell, and Spatial Transcriptomics

Advanced Science, EarlyView.
Grounded in real biological RNA‐seq data, the framework benchmarks ten differential transcript usage (DTU) methods across short‐read bulk, long‐read bulk, long‐read single‐cell, and long‐read spatial transcriptomics. By integrating reference transcript sets with ranked DTU results, the Transcript Set Enrichment Score (TSES) identifies data‐type ...
Chenxing Zhang, Jun Liu, Qi Zhao, Huilong Yin, Angang Yang, Minhua Zheng, Rui Zhang   +6 more
wiley   +1 more source

Numerical study of high-energy spark ignition characteristics in a scramjet combustor

Case Studies in Thermal Engineering
Reliable ignition is a fundamental prerequisite for the scramjet engines. In order to improve the reliability of ignition, further enhance the application of spark ignition in engineering, and improve the ignition ability in the field of supersonic ...
Ziyan Gao, Meng Zhang, Zhibo Zhang, Yun Wu, Xing Zheng, Huifeng Miao   +5 more
doaj   +1 more source

Research on the Ignition Process and Flame Stabilization of a Combination of Step and Strut: Experimental and Numerical Study

Energies, 2023
A combined application of step and strut was put forward to achieve reliable ignition and flame stabilization. In this work, the ignition process and temperature distribution have been tested, and a new reduction approach applied to jet fuel oxidation ...
Shilong Zhao, Hui Xiao, Yafan Li
doaj   +1 more source