Patch size adaptive image inpainting

( Huaming Liu ),( Guanming Lu ),( Xuehui Bi ),( Weilan Wang ) 한국인터넷정보학회 2021 KSII Transactions on Internet and Information Syst Vol.15 No.10

Texture synthesis technology has the advantages of repairing texture and structure at the same time. However, during the filling process, the size of the patch is fixed, and the content of the filling is not fully considered. In order to be able to adaptively change the patch size, we used the exemplar-based inpainting technique as the test algorithm, considering the image structure and texture, calculated the image structure patch size and texture patch size, and comprehensively determined the image patch size. This can adaptively change the patch size according to the filling content. In addition, we use multi-layer images to calculate the priority, so that the order of image repair was more stable. The proposed repair algorithm is compared with other image repair algorithms. The experimental results showed that the proposed adaptive image repair algorithm can better repair the texture and structure of the image, which proved the effectiveness of the proposed algorithm.

Geometry Characteristics Prediction of Single Track Cladding Deposited by High Power Diode Laser Based on Genetic Algorithm and Neural Network

Huaming Liu,Xunpeng Qin,Song Huang,Lei Jin,Yongliang Wang,Kaiyun Lei 한국정밀공학회 2018 International Journal of Precision Engineering and Vol.19 No.7

This paper aims to establish a correlation between the process parameters and geometrical characteristics of the sectional profile of the single track cladding deposited by high power diode laser with rectangle beam spot. By applying the genetic algorithm and back propagation neural network, a nonlinear model for predicting the geometry features of the single track cladding is developed. A full factorial design method is used to conduct the experiments, and the experimental results are chosen randomly as training dataset and testing dataset for the neural network. Three main input variables such as laser power, scanning speed, and powder thickness were considered. The performance of the genetic algorithm and back propagation artificial neural network was compared to that of the standard back propagation neural network. To improve the accuracy of the neural network, one-hidden-layer and double-hidden-layer neural network with different architectures were performed. Further, one-output and multi-output neural network are also trained and tested. The results indicate that, by using genetic algorithm, the prediction accuracy of the neural network is significantly improved. Meanwhile, the double-hidden-neural network has higher prediction accuracy than the one-hidden-layer-neural network, while the one-output-neural network has higher prediction accuracy than the multi-output-neural network.

PCDH8 protects MPP+-induced neuronal injury in SH-SY5Y cells by inhibiting MAPK pathway

Wei Huaming,Wu Yuping,Zhuang Huanxia,Su Hongyi 대한독성 유전단백체 학회 2023 Molecular & cellular toxicology Vol.19 No.2

Background Parkinson's disease (PD) is a common degenerative disease of the nervous system in the elderly. Objectives To investigate the eff ect of protocadherin 8 (PCDH8) on PD and explore the underlying mechanism. Results PCDH8 was down-regulated in PD. Silencing PCDH8 inhibited cell viability, increased cell cytotoxicity and apoptosis, but overexpression of PCDH8 acted the opposed eff ects. Then, silencing PCDH8 increased the levels of IL-1β, IL-8, TNF-α and ROS production, but decreased SOD and CAT activity, while up-regulation of PCDH8 acted the opposed eff ects. In addition, down-regulation of PCDH8 activated MAPK pathway, but up-regulation of PCDH8 inhibited MAPK pathway. Furthermore, in SH-SY5Y cells treated by MPP + , SB203580 reversed cell injuries induced by silencing PCDH8. Conclusion PCDH8 was down-regulated in PD, and PCDH8 protected MPP + -induced neuronal injury in SH-SY5Y cells via inhibiting MAPK pathway.

Improved Maximum Correntropy Unscented Kalman Filter for Spacecraft Attitude Estimation

Shuai Chu,Huaming Qian,Peng Ding 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.6

In this article, an improved maximum correntropy unscented Kalman filter (IMCUKF) is proposed for the problem of mutation and non-Gaussian noise in the spacecraft attitude estimation system. The IMCUKF proposed in this paper transforms the above problem into a nonlinear regression problem, which is achieved by establishing a robust filter based on the maximum correntropy criterion and adaptively adjusting the prior covariance using an adaptive fading factor. In particular, the IMCUKF uses the Cauchy kernel function instead of the Gaussian kernel function to solve the problem that the maximum correntropy Kalman filter is easy to collapse due to the emergence of singular matrices. In addition, this paper applies the additive quaternion property to derive the Kalman filter gain to satisfy the constraint of quaternion normalization. Simulation results demonstrate the superiority of the proposed algorithm as compared with the existing filtering algorithm with the measurement outliers, state mutations, and non-Gaussian noises.

Photocatalytic oxidative desulfurization of dibenzothiophene catalyzed by amorphous TiO2 in ionic liquid

Wenshuai Zhu,Huaming Li,Yehai Xu,Bilian Dai,Hui Xu,Chao Wang,Yanhong Chao,Hui Liu 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.2

Three types of TiO2 were synthesized by a hydrolysis and calcination method. The catalysts were characterizedby X-ray powder diffraction (XRD), diffuse reflectance spectrum (DRS), Raman spectra, and X-ray photoelectronspectroscopy (XPS). The XRD and Raman spectra indicated that amorphous TiO2 was successfully obtained at100 oC. The results indicated that amorphous TiO2 achieved the highest efficiency of desulfurization. The photocatalyticoxidation of dibenzothiophene (DBT), benzothiophene (BT), 4,6-dimethyldibenzothiophene (4,6-DMDBT) anddodecanethiol (RSH) in model oil was studied at room temperature (30 oC) with three catalysts. The system containedamorphous TiO2, H2O2, and [Bmim]BF4 ionic liquid, ultraviolet (UV), which played vitally important roles in the photocatalyticoxidative desulfurization. Especially, the molar ratio of H2O2 and sulfur (O/S) was only 2 : 1, which correspondedto the stoichiometric reaction. The sulfur removal of DBT-containing model oil with amorphous TiO2 couldreach 96.6%, which was apparently superior to a system with anatase TiO2 (23.6%) or with anatase - rutile TiO2 (18.2%). The system could be recycled seven times without a signicant decrease in photocatalytic activity.

Efficient degradation of methylene blue dye by catalytic oxidation using the Na_8Nb_6O_19.13H_2O/H_2O-2 system

Chengtang Liu,Huaming Li,Hui Xu,Ling Liu,Li Xu,Zhixiang Ye 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.4

Na_8Nb_6O_19.13H_2O particles were synthesized by a simple hydrothermal method. The catalysts were characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM) and thermogravimetric and differential scanning (TG-DSC). The XRD and TG-DSC analyses indicated that Na_8Nb_6O_19.13H-2O was an intermediate hexaniobate during the preparation of NaNbO_3 powders. Methylene blue (MB) dye degradation using Na_8Nb_6O_19.13H_2O/H_2O_2,Nb_2O_5/H_2O_2 and NaNbO_3/H_2O_2 systems were investigated, respectively. Among the catalytic oxidation systems, Na_8Nb_6O_19·13H_2O showed the highest activity for degradation of MB in the presence of H_2O_2. The results indicated that the dye degradation efficiency could be 93.5% at 30 ℃ after 60 min in the presence of the Na_8Nb_6O_19·13H_2O/H_2O-2 system. It was also found that the degradation of MB over the catalytic systems followed pseudo-first-order kinetics, and the degradation rate was 0.02376 min−1 in the Na_8Nb_6O_19.13H_2O/H_2O_2 system, which was higher than that in the Nb_2O_5/H_2O_2and NaNbO_3/H_2O_2 systems. A possible mechanism for MB catalytic oxidation degradation using the Na_8Nb_6O_19.13H-2O/H_2O_2 system was proposed.

Energy Absorption Characteristics of PVC Coarse Aggregate Concrete under Impact Load

Shi Hu,Huaming Tang,Shenyao Han 한국콘크리트학회 2021 International Journal of Concrete Structures and M Vol.15 No.4

In this paper, polyvinyl chloride (PVC) coarse aggregate with different mixing contents is used to solve the problems of plastic pollution, low energy absorption capacity and poor damage integrity, which provides an important reference for PVC plastic concrete used in the initial support structures of highway tunnels and coal mine roadway. At the same time, the energy absorption characteristics and their relationship under different impact loads are studied, which provides an important reference for predicting the energy absorption characteristics of concrete under other PVC aggregate content or higher impact speed. This study replaced natural coarse aggregate in concrete with different contents and equal volume of well-graded flaky PVC particles obtained by crushing PVC soft board. Also, slump, compression, and splitting strength tests, a free falling low-speed impact test of steel balls and a high-speed impact compression test of split Hopkinson pressure bar (SHPB) were carried out. Results demonstrate that the static and dynamic compressive strength decreases substantially, and the elastic modulus and slump decrease slowly with the increase of the mixing amount of PVC aggregate (0–30%). However, the energy absorption rate under low-speed impact and the specific energy absorption per MPa under high-speed impact increase obviously, indicating that the energy absorption capacity is significantly enhanced. Regardless of the mixing amount of PVC aggregate, greater strain rate can significantly enhance the dynamic compressive strength and the specific energy absorption per MPa. After the uniaxial compression test or the SHPB impact test, the relative integrity of the specimen is positively correlated with the mixing amount of PVC aggregate. In addition, the specimens are seriously damaged with the increase of the impact strain rate. When the PVC aggregate content is 20%, the compressive strength and splitting strength of concrete are 33.8 MPa and 3.26 MPa, respectively, the slump is 165 mm, the energy absorption rate under low-speed impact is 89.5%, the dynamic compressive strength under 0.65 Mpa impact air pressure is 58.77 mpa, and the specific energy absorption value per MPa is 13.33, which meets the requirements of shotcrete used in tunnel, roadway support and other impact loads. There is a linear relationship between the energy absorption characteristics under low-speed impact and high-speed impact. The greater the impact pressure, the larger the slope of the fitting straight line. The slope and intercept of the fitting line also show a good linear relationship with the increase of impact pressure. The conclusions can be used to predict the energy absorption characteristics under different PVC aggregate content or higher-speed impact pressure, which can provide important reference for safer, more economical, and environmental protection engineering structure design.

MECHANOCHEMICAL SYNTHESIS OF NiO NANOPARTICLES: INSIGHT INTO THE NATURE OF PREFERRED GROWTH ORIENTATION

XIAOYU LI,HUAMING YANG,LIANGJIE FU,TIANCHENG LIU 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.4

Nickel oxide (NiO) nanoparticles were synthesized by calcination at 400?C to 700?C for 8 h of theprecursor obtained via mechanochemical reaction of Ni(NO 3 ) 2 ? 6 H 2 O with citric acid as a dis-persant. The nanoparticles were characterized by thermogravimetric-diferential scanningcalorimetry (TG-DSC), X-ray difraction (XRD) and transmission electron microscopy (TEM). The kinetics of diferent surfaces of the nanocrystals under nonisothermal conditions wasinvestigated. The activation energies for diferent lattice planes of NiO nanoparticles weredetermined using the Arrhenius equation, revealing their preferred orientation. The growth ofNiO obeyed the general theory that nanoparticles with the largest surface energy tend to form. XRD data reveal that the NiO nanoparticles possess preferred (111) or (200) orientations thatre°ect their complex activity. The nature of preferred growth orientation was found to benegative difusion activity among diferent lattice surfaces, which indicates that oxygen atomsdi®use from low oxygen concentration on the lattice surface to high concentration on the latticesurface.

Expression levels of RUNX3 and FGFR2 in peripheral blood of severe acute pancreatitis and their clinical significance

Yongyong Liang,Huaming Ding 대한외과학회 2023 Annals of Surgical Treatment and Research(ASRT) Vol.104 No.2

Purpose: Severe acute pancreatitis (SAP) is a life-threatening inflammatory syndrome of the pancreas. This study aimed to analyze the clinical significance of runt-associated transcription factor 3 (RUNX3 ) and fibroblast growth factor receptor 2 (FGFR2 ) expression alterations in SAP. Methods: This study included 18 SAP patients in Wuzhong People’s Hospital from November 2019 to December 2021 and 18 healthy controls. RUNX3 and FGFR2 expression levels were determined by RT-quantitative PCR. Correlations between RUNX3 /FGFR2 and sex, age, etiology, CRP, procalcitonin, AST, LDH, BUN, Acute Physiology and Chronic Health Evaluation II (APACHE II), Ranson score, Bedside Index for Severity in Acute Pancreatitis (BISAP) score, sequential organ failure assessment (SOFA), and modified computed tomography severity index (MCTSI) score were analyzed. Diagnostic values of RUNX3 and FGFR2 in SAP were analyzed using the receiver-operating characteristic curve. The binding of RUNX3 to FGFR2 was analyzed by chromatin immunoprecipitation. Results: RUNX3 and FGFR2 were downregulated in peripheral blood of SAP patients. RUNX3 and FGFR2 were negatively correlated with CRP, procalcitonin, AST, LDH, BUN, APACHE II score, Ranson score, BISAP score, SOFA score, and MCTSI score. Sensitivity and specificity of RUNX3 level of <0.9650 for SAP diagnosis were 88.89% and 72.22%, respectively. Sensitivity and specificity of FGFR2 level of <0.8950 for SAP diagnosis were 66.67% and 83.33%, respectively. RUNX3 was enriched in the FGFR2 promoter and was positively correlated with FGFR2 . Conclusion: RUNX3 and FGFR2 were downregulated in peripheral blood of SAP patients and served as candidate biomarkers for SAP diagnosis. RUNX3 bound to the FGFR2 promoter to promote FGFR2 transcription.

Synthesis of Nanoporous Materials Al-MCM-41 from Natural Halloysite

Yaling Xie,Aidong Tang,HUAMING YANG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2015 NANO Vol.10 No.1

Nanoporous materials Al-MCM-41 with varying Si/Al molar ratios have been successfully synthesized from natural clay mineral halloysite nanotubes (HNTs). Hydrothermal treatment of acid-pretreated HNTs and NaOH solution resulted in the one-step synthesis of final nanoporous products by using surfactant. The effects of Si/Al molar ratios (7.7, 61.0 and 176.5) on the surface area, porosity and degree of structural order of Al-MCM-41 materials have been investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), N2 adsorption–desorption measurements and Fourier transform infrared (FTIR) spectra techniques. The results indicated that Si/Al molar ratio had important effect on the characteristics of nanoporous materials, and Al-MCM-41 with an intermediate Si/Al molar ratio of 61.0 exhibited excellent characteristics with high degree of order, high surface area (SBET) of 1033 m2 /g and pore volume of 0.92 mL/g.