Today’s forensic science introduces a new research area for digital image analysis formultimedia security.So,Image authentication issues have been raised due to the wide use of image manipulation software to obtain a...Today’s forensic science introduces a new research area for digital image analysis formultimedia security.So,Image authentication issues have been raised due to the wide use of image manipulation software to obtain an illegitimate benefit or createmisleading publicity by using tempered images.Exiting forgery detectionmethods can classify only one of the most widely used Copy-Move and splicing forgeries.However,an image can contain one or more types of forgeries.This study has proposed a hybridmethod for classifying Copy-Move and splicing images using texture information of images in the spatial domain.Firstly,images are divided into equal blocks to get scale-invariant features.Weber law has been used for getting texture features,and finally,XGBOOST is used to classify both Copy-Move and splicing forgery.The proposed method classified three types of forgeries,i.e.,splicing,Copy-Move,and healthy.Benchmarked(CASIA 2.0,MICCF200)and RCMFD datasets are used for training and testing.On average,the proposed method achieved 97.3% accuracy on benchmarked datasets and 98.3% on RCMFD datasets by applying 10-fold cross-validation,which is far better than existing methods.展开更多
The interaction between shock waves and multiple cylinders,referred to as shock–cylinder interaction(SCI),is an important phenomenon in science and engineering.However,its underlying physical mechanisms remain unclea...The interaction between shock waves and multiple cylinders,referred to as shock–cylinder interaction(SCI),is an important phenomenon in science and engineering.However,its underlying physical mechanisms remain unclear.This study entailed the numerical simulation of the aerobreakup of two tandem water columns subjected to a high-speed gas flow by using an adaptive mesh refinement(AMR)-based diffusion-interface model.The objective was to elucidate the changes in water–column deformation patterns over a wide range of Weber numbers.Statistical analysis was performed to examine the deformation of the water columns in vertical directions.Results reveal distinct deformation patterns between the two columns as the Weber number increases.Additionally,an extended exponential stretching law model was devised,and its improved capability to predict the deformation patterns was demonstrated.展开更多
Dear Editor,Bilateral circumscribed choroidal hemangioma(CCH)is mostly associated with Sturge-Weber syndrome and rarely occurs in healthy individuals.So,we present the case about bilateral CCH that occurred in a healt...Dear Editor,Bilateral circumscribed choroidal hemangioma(CCH)is mostly associated with Sturge-Weber syndrome and rarely occurs in healthy individuals.So,we present the case about bilateral CCH that occurred in a healthy person and to evaluate the efficacy of 0.05 mL of anti-vascular endothelial growth factor(anti-VEGF)medication and laser photocoagulation in the treatment of CCH.We obtained the written informed consent from the patient,and this case study was in accordance with the tenets of the Declaration of Helsinki.展开更多
基金funded by Princess Nourah bint Abdulrahman University Researchers Supporting Project number(PNURSP2024R236),Princess Nourah bint Abdulrahman University,Riyadh,Saudi Arabia.
文摘Today’s forensic science introduces a new research area for digital image analysis formultimedia security.So,Image authentication issues have been raised due to the wide use of image manipulation software to obtain an illegitimate benefit or createmisleading publicity by using tempered images.Exiting forgery detectionmethods can classify only one of the most widely used Copy-Move and splicing forgeries.However,an image can contain one or more types of forgeries.This study has proposed a hybridmethod for classifying Copy-Move and splicing images using texture information of images in the spatial domain.Firstly,images are divided into equal blocks to get scale-invariant features.Weber law has been used for getting texture features,and finally,XGBOOST is used to classify both Copy-Move and splicing forgery.The proposed method classified three types of forgeries,i.e.,splicing,Copy-Move,and healthy.Benchmarked(CASIA 2.0,MICCF200)and RCMFD datasets are used for training and testing.On average,the proposed method achieved 97.3% accuracy on benchmarked datasets and 98.3% on RCMFD datasets by applying 10-fold cross-validation,which is far better than existing methods.
基金supported by the National Natural Science Foundation of China (Grant Nos.12202070 and 11772065)the Foundation of National Key Laboratory of Computational Physics.
文摘The interaction between shock waves and multiple cylinders,referred to as shock–cylinder interaction(SCI),is an important phenomenon in science and engineering.However,its underlying physical mechanisms remain unclear.This study entailed the numerical simulation of the aerobreakup of two tandem water columns subjected to a high-speed gas flow by using an adaptive mesh refinement(AMR)-based diffusion-interface model.The objective was to elucidate the changes in water–column deformation patterns over a wide range of Weber numbers.Statistical analysis was performed to examine the deformation of the water columns in vertical directions.Results reveal distinct deformation patterns between the two columns as the Weber number increases.Additionally,an extended exponential stretching law model was devised,and its improved capability to predict the deformation patterns was demonstrated.
基金Supported by Training Program for Academic and Technical Leaders of Major Disciplines-Young Talents of Jiangxi Province(No.20232BCJ23044)Natural Science Foundation of Jiangxi Province(No.20224BAB206050)Science and Technology Key Program of Education Department of Jiangxi Province(No.GJJ2200125).
文摘Dear Editor,Bilateral circumscribed choroidal hemangioma(CCH)is mostly associated with Sturge-Weber syndrome and rarely occurs in healthy individuals.So,we present the case about bilateral CCH that occurred in a healthy person and to evaluate the efficacy of 0.05 mL of anti-vascular endothelial growth factor(anti-VEGF)medication and laser photocoagulation in the treatment of CCH.We obtained the written informed consent from the patient,and this case study was in accordance with the tenets of the Declaration of Helsinki.
