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Optimization of an Artificial Intelligence Database and Camera Installation for Recognition of Risky Passenger Behavior in Railway Vehicles

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Computers, Materials & Continua 2025年第1期82卷 1277-1293页

作者： Min-kyeong Kim Yeong Geol Lee Won-Hee Park Su-hwan Yun Tae-soon Kwon Duckhee Lee Railroad Test&Certification Division Korea Railroad Research Institute(KRRI)Cheoldo BangmulgwanroUiwang-si16105Republic of Korea Railroad Safety Division Korea Railroad Research Institute(KRRI)Cheoldo BangmulgwanroUiwang-si16105Republic of Korea

Urban railways are vital means of public transportation in *** than 30%of metropolitan residents use the railways,and this proportion is expected to *** enhance safety,the government has mandated the installation of closed-circuit televisions in all carriages by ***,cameras still monitored *** address this limitation,we developed a dataset of risk factors and a smart detection system that enables an immediate response to any abnormal behavior and intensive monitoring *** created an innovative learning dataset that takes into account seven unique risk factors specific to Korean railway *** data collection was conducted across the Shinbundang Line of the Incheon Transportation Corporation,and the Ui-Shinseol *** observed several behavioral characteristics and assigned unique annotations to *** also considered carriage *** performance was evaluated by camera placement and *** the camera installation plan was *** dataset will find immediate applications in domestic railway *** artificial intelligence algorithms will be verified shortly.

关键词： AI railway vehicle risk factor smart detection AI training data

An investigation on the wind profiles and gravity wave dynamics in MLT region based on the meteor radars from the Meridian Project

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Earth and Planetary Physics 2025年第1期9卷 29-38页

作者： Tai Liu Zhe Wang MengXi Shi Willie soon ShiCan Qiu Department of Geophysics College of the Geology Engineering and GeomaticsChang’an UniversityXi’an 710054China Center for Environmental Research and Earth Sciences(CERES) SalemMA 01970USA Institute of Earth Physics and Space Science(ELKH EPSS) 9400SopronHungary

The meteor radar can detect the zenith angle,azimuth,radial velocity,and altitude of meteor trails so that one can invert the wind profiles in the mesosphere and low thermosphere(MLT)region,based on the Interferometric and Doppler *** this paper,the horizontal wind field,gravity wave(GW)disturbance variance,and GW fluxes are analyzed through the meteor radar observation from 2012−2022,at Mohe(53.5°N,122.4°E)and Zuoling(30.5°N,114.6°E)stations of the(Chinese)Meridian *** Lomb−Scargle periodogram method has been utilized to analyze the periodic variations for time series with observational data *** results show that the zonal winds at both stations are eastward dominated,while the meridional winds are southward *** variance of GW disturbances in the zonal and meridional directions increases gradually with height,and there is a strong pattern of annual *** zonal momentum flux of GW changes little with height,showing weak annual *** meridional GW flux varies gradually from northward to southward with height,and the annual periodicity is *** both stations,the maximum values of zonal and meridional wind occur close to the peak heights of GW flux,with opposite *** observational evidence is consistent with the filtering *** horizontal wind velocity,GW flux,and disturbance variance of the GW at Mohe are overall smaller than those at Zuoling,indicating weaker activities in the MLT at *** power spectral density(PSD)calculated by the Lomb−Scargle periodogram shows that there are 12-month period and 6-month period in horizontal wind field,GW disturbance variance and GW flux at both stations,and especially there is also a 4-month cycle in the disturbance *** PSD of the 12-month and 6-month cycles exhibits maximum values below 88 km and above 94 km.

关键词： meteor radar wind field gravity wave Lomb−Scargle method

Uptake of copper ion by activated sludge and its bacterial community variation analyzed by 16S rDNA

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Journal of Environmental Sciences 2003年第3期15卷 328-333页

作者： XIEBing KANGKyoung-soon DepartmentofEnvironmentalandTechnology EastChinaNormalUniversityShanghai200062China.E-mail:wswz@*** GraduateSchoolofEnvironmentalandInformationSciences YokohamaNationalUniversityYokohama240-8501Japan

The effect and uptake of copper ion on SBR(sequence batch reactor) biological treatment system was studied. Special nutrient and powder activated carbon(PAC) additive were tested as uptake stimulation technique. Results showed that copper ion had higher effect on unacclimated activated sludge system than on acclimated one. The special nutrient adding could enhance the uptake of copper significantly, while PAC adding could improve the sludge settling and decrease the turbidity of effluent. The variation of bacterial community analyzed by 16S rDNA method showed the acclimation of copper could increase copper resistance species, and excess accumulation could cause some species diminish. It was confirmed that acclimation could improve the resistance and uptake ability of microorganism to heavy metal.

关键词： copper ion uptake nutrients powder activated carbon (PAC) 16S rDNA length polymorphism (LPM)

Subsequent bilateral acute carpal tunnel syndrome due to tophaceous infiltration:A case report

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World Journal of Clinical Cases 2024年第2期12卷 418-424页

作者： soon-Chin Yeoh Wen-Tien Wu Jui-Tien shih Wen-Chin Su Kuang-Ting Yeh School of Medicine Tzu Chi UniversityHualien 970374TaiwanChina Department of Orthopedics Hualien Tzu Chi HospitalBuddhist Tzu Chi Medical FoundationHualien 970473TaiwanChina Department of Orthopaedic Surgery Taoyuan Armed Forces General HospitalTaoyuan 325208TaiwanChina Department of Clinical Education Hualien Tzu Chi HospitalBuddhist Tzu Chi Medical FoundationHualien 970473TaiwanChina Graduate Institute of Clinical Pharmacy Tzu Chi UniversityHualien 970374TaiwanChina

BACKGROUND Acute carpal tunnel syndrome(ACTS)is commonly caused by repetitive strain,trauma,or inflammatory ***,ACTS due to tophaceous gout is a clinical event that remains poorly understood and *** rare manifestation necessitates prompt diagnosis and intervention to prevent irreversible *** SUMMARY A 51-year-old man who had poorly controlled hyperuricemia presented with ACTS secondary to tophaceous *** of rapid symptom progression symptoms and severe median nerve compression within 3 mo,the patient underwent emergency decompression surgery for both wrists at different time ***,he exhibited complete recovery of sensory and motor functions,with no recurrence at long-term *** outcomes were achieved through immediate decompression surgery,anti-inflammatory medications,postoperative active and passive range-of-motion exercises,and intermittent wrist *** diagnosis and surgical intervention,when necessary,are crucial for preventing long-term complications and obtaining favorable outcomes in patients with *** optimal gout management strategy involving pharmacologic therapy and lifestyle modifications may help minimize ACTS recurrence and improve clinical *** Prompt surgical intervention and optimal gout management are crucial for preventing irreversible nerve damage and ACTS recurrence.

关键词： Acute carpal tunnel syndrome Gout Surgical decompression Range-of-motion exercises Case report

Impact of Pacific Decadal Oscillation on Frequency Asymmetry of El Nio and La Nia Events

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Advances in Atmospheric Sciences 2018年第5期35卷 493-494页

作者： soon-Il AN Department of Atmospheric Sciences Yonsei University Seou103722 Korea

El Nio-Southern Oscillation（ENSO）is an abnormal sea surface warming or cooling phenomenon over the tropical Pacific,which also has severe global impact.

关键词： El o and La Ni a Events La

HYDRODYNAMIC CHARACTERISTICS AND OPTIMIZATION DESIGN OF EFFICIENT AXIAL-FLOW BLAST WITH LOW NOISE AND ENERGY SAVING

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Journal of Hydrodynamics 2002年第4期14卷 40-46页

作者： Tan soon Keat School of Civil and Structural Engineering Nanyang Technological University

Based on the demand on efficient axial-flow blast with low noise and energy saving, a blade was designed through the application of the unequal work distribution principle and the exponential twisted camber was used to shape blades. Then, the hydrodynamic characteristics of blades were studied and the strengths and vibrations of blades and hydro-dynamic noise of blast were analyzed. Furthermore, the software of optimization design of axial-flow blast was developed. Finally, the HMF-T40No.20 axial-flow blast used in large textile conditioner system of cotton spinning industry was designed, which could meet the required total safety and environmental requirements as the corresponding test demonstrates. The study is beneficial to designing axial-flow blast.

关键词： Acoustic noise Design Noise abatement Optimization Software engineering Turbomachine blades

Implicit Function Theorem and Its Application to a Ulam's Problem for Exact Differential Equations

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Acta Mathematica Sinica,English Series 2010年第11期26卷 2085-2092页

作者： soon-Mo JUNG Mathematics Section College of Science and TechnologyHong-Ik University

We prove a global version of the implicit function theorem under a special condition and apply this result to the proof of a modified Hyers-Ulam-Rassias stability of exact differential equations of the form, g（x, y）... 详细信息

关键词： Implicit function theorem Ulam's problem Hyers-Ulam-Rassias stability exact differ-ential equation potential function

THEORETICAL,NUMERICAL AND EXPERIMENTAL STUDY OF WATER HAMMER IN PIPE SYSTEM WITH COLUMN SURGE CHAMBER

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Journal of Hydrodynamics 2003年第5期15卷 20-28页

作者： Tan soon Keat ENV-NTU Environmental Engineering Research Centre

A new kind of governing equations for water hammer based on the elasticcolumn theory was proposed and adopted to analyse water hammer phenomenon in the pipe system with avertical column surge chamber and water level fluctuation in the surge chamber during pressuretransient. The wrongness existing in the classical governing equations for water hammer wasanalysed. A typical reservoir-valve pipe system was chosen as an example to verify the new governingequations numerically and experimentally. The finite difference method based on the method ofcharacteristics was used to solve numerically the nonlinear characteristic equations. The temporalevolutions of transient volume flux and head and of water level fluctuation for various surgechamber configurations were worked out, assuming that the air in the surge chamber are *** relevant experiment was conducted to verify the new governing equations and numerical *** numerical and experimental results show that the new governing equations are valid and theconventional assumption that the pressure head at the base of a surge chamber equals that of thestatic head above it during pressure transient is not always valid. The surge chamber generallyreises the period of transient pressure wave in pipe system, reduces the maximum pressure envelopeand lifts the minimum envelope substantially. The water level fluctuation in the surge chamber wasnumerically and experimentally observed. Increasing the size of the surge chamber and/or decreasingthe initial air pressure in the surge chamber enhance the effectiveness of the surge chamber insuppressing pressure wave.

关键词： water hammer vertical column surge chamber pipe system

On an Asymptotic Behavior of Exponential Functional Equation

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Acta Mathematica Sinica,English Series 2006年第2期22卷 583-586页

作者： soon-Mo JUNG Mathematics Section College of Science and Technology Hong-Ik University

The stability problems of the exponential （functional） equation on a restricted domain will be investigated, and the results will be applied to the study of an asymptotic property of that equation. More precisely, the following asymptotic property is proved： Let X be a real （or complex） normed space. A mapping f ： X → C is exponential if and only if f（x ＋ y） - f（x）f（y） → 0 as ｜｜x｜｜＋｜｜y｜｜ → ∞ under some suitable conditions.

关键词： Exponential equation Stability Superstability