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2,713 results on '"Qiao, Jun"'

14. The Radon and Hilbert transforms and their applications to atmospheric waves

Author

Víctor C. Mayta, Ángel F. Adames Corraliza, and Qiao‐Jun Lin

Subjects
atmospheric waves, group velocity, phase speed, Meteorology. Climatology, QC851-999
Abstract

Abstract The Radon and Hilbert transform and their applications to convectively coupled waves (CCWs) are reviewed. The Hilbert Transform is used to compute the wave envelope, whereas the Radon transform is used to estimate the phase and group velocities of CCWs. Together, they provide an objective method to understand CCW propagation. Results reveal phase speeds and group velocities for fast waves (mixed Rossby‐gravity, westward and eastward inertio‐gravity, and Kelvin) that are consistent with previous studies and with Matsuno's equatorial wave dispersion curves. However, slowly‐propagating tropical depression‐like systems and equatorial Rossby waves exhibit wave envelopes that propagate faster than the individual wave crests, which is not predicted by dry shallow water theory.

Published
2024
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30. Assessment of the Madden‐Julian Oscillation in CMIP6 Models Based on Moisture Mode Theory

Author

Qiao‐Jun Lin, Víctor C. Mayta, and Ángel F. Adames Corraliza

Subjects
CMIP6, Madden‐Julian Oscillation, moisture mode, Geophysics. Cosmic physics, QC801-809
Abstract

Abstract The moist processes of the Madden‐Julian Oscillation (MJO) in the Coupled Model Intercomparison Project Phase 6 models are assessed using moisture mode theory‐based diagnostics over the Indian Ocean (10°S–10°N, 75°E–100°E). Results show that no model can capture all the moisture mode properties relative to the reanalysis. Most models satisfy weak temperature gradient balance but have unrealistically fast MJO propagation and a lower moisture‐precipitation correlation. Models that satisfy the most moisture mode criteria reliably simulate a stronger MJO. The background moist static energy (MSE) and low‐level zonal winds are more realistic in the models that satisfy the most criteria. The MSE budget associated with the MJO is also well‐represented in the good models. Capturing the MJO's moisture mode properties over the Indian Ocean is associated with a more realistic representation of the MJO and thus can be employed to diagnose MJO performance.

Published
2024
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40. Analysis on the Influence of Structural Adhesive Length on Torsional Stiffness of Body-in-White

Author

Li, Chao, Qiao, Jun-ping, Wan, Long, Bao, Jing-ru, Yang, Jian-wei, Zhang, Dong-sheng, China Society of Automotive Engineers, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, and Zhang, Junjie James, Series Editor

Published
2023
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46. Analysis of Fatty Acid Composition and Volatile Flavor Composition of Different Parts of Beef Tallow

Author

WANG Chong, WANG Qiao-jun, MA Guo-li, ZHANG Yi-xian, JIN Jun, and WU Gang-cheng

Subjects
beef tallow, fatty acids, volatile aroma components, gas chromatography-olfactory mass spectrometry, Food processing and manufacture, TP368-456, Nutrition. Foods and food supply, TX341-641
Abstract

To smelt beef tallow by using 1 000 kg as the mass of each sample of beef fat, and the fatty acid composition of the obtained butter including perirenal fat, abdominal fat and segmented fat was analyzed by gas chromatography (GC), and the volatile flavor components were detected by gas chromatography-olfactory mass spectrometry (GC-O-MS). The results showed that the saturated fatty acids (SFA) of the three kinds of beef tallow were mainly palmitic acid and stearic acid, and the unsaturated fatty acids (UFA) were mainly oleic acid. In addition, there was no significant difference (P>0.05) in palmitic acid content among three kinds of beef tallow. Although there were no significant differences in the stearic acid and oleic acid contents between perirenal tallow and belly tallow (P>0.05), there were significant differences in the stearic acid and oleic acid contents between partitioned tallow and waist oil and belly tallow (P

Published
2023
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47. Segmentation and Evaluation of Continuous Rehabilitation Exercises

Author

HU Mingxuan, QIAO Jun, ZHANG Zhinan

Subjects
motion evaluation, motion segmentation, gaussian mixture model (gmm), dynamic time warping (dtw), Engineering (General). Civil engineering (General), TA1-2040, Chemical engineering, TP155-156, Naval architecture. Shipbuilding. Marine engineering, VM1-989
Abstract

To provide an accurate and objective feedback on rehabilitation training movements and to improve the motivation of rehabilitation patients in rehabilitation training, a motion evaluation method capable of processing continuous human rehabilitation training movement data is proposed. First, a motion segmentation method based on the Gaussian mixture model (GMM) is developed to extract single motion repetition from continuous repetitive motion sequences of the same motion. Then, based on relevant a priori knowledge, a multi-feature fusion motion evaluation method combining significant motion feature dynamic time warping (DTW) distance evluation and Gaussian mixture model likelihood evaluation is proposed to perform motion evaluation in both the overall motion feature and local joint information of rehabilitation exercises. The results show that the motion segmentation method can segment the motion data of continuous repetitive motions well, and the correct rate of segmented motions on the dataset reaches more than 95%. The multi-feature fusion motion evaluation method effectively improves the differentiation of motion evaluation between healthy samples and rehabilitation patient samples, so that the motion scores of healthy samples are mainly distributed in the range of 0.93—0.94 on a scale of 0—1, while the motion scores of patient samples are mainly distributed in the range of 0.81—0.89.

Published
2023
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49. The small non-coding RNA rli106 contributes to the environmental adaptation and pathogenicity of Listeria monocytogenes

Author

Guo Yun, Ji Chunhui, Wang Lixia, Ning Chengcheng, Li Na, Li Zhiyuan, Shang Yunxia, Li Yaling, Sun Yaoqiang, Huang Xiaoxing, Li Jie, Cai Xuepeng, Meng Qingling, and Qiao Jun

Subjects
listeria monocytogenes, rli106 srna, environmental adaptation, pathogenicity, degu target gene., Veterinary medicine, SF600-1100
Abstract

Listeria monocytogenes (LM) is an important food-borne pathogen, and the risk of its ingestion is a serious public health issue. The better its environmental adaptation mechanisms and pathogenicity are understood, the better the risk it poses can be countered. The regulatory role of the small non-coding RNA (sRNA) rli106 in the environmental adaptation and pathogenicity of LM is still unclear and this study investigated that role through its biological function.

Published
2023
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