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Qin Zhang,Lijiao Fan,Wenbin Liu,Yuming Xie,Jiangang Li,Guolin Huang 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-
The core–shell structure UiO-66-NH2@Ni-MOF was prepared by in-diffusion growth of 2D Ni-MOF onUiO-66-NH2 using PVP (polyvinylpyrrolidone) as a structural guide. It was applied to the adsorption ofU(VI) in aqueous solution. The materials were characterized by powder X-ray diffraction (PXRD),Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electronmicroscopy (TEM), and energy dispersive spectrometer (EDS). The UiO-66-NH2@Ni-MOF adsorptionto U(VI) was investigated experimentally. The study showed that the adsorption of U(VI) onto UiO-66-NH2@Ni-MOF was endothermic and spontaneous. At pH 5.00 and 308 K, the adsorption capacity was581.40 mg/g according to Langmuir model. In addition, the adsorption process can be described by thepseudo-second-order kinetic model. The adsorption capacity was kept at 83.83% of its original one afterfive sorption–desorption cycles, a promising indication for repetitive usage.
Ma, Jiangang,Ren, Ziyan,Zhao, Guoxin,Zhang, Yanli,Koh, Chang-Seop IEEE 2018 IEEE transactions on magnetics Vol.54 No.3
<P>In order to extend the application of reliability-based design optimization to engineering electromagnetic problems, the main contribution of this paper is to propose an efficient reliability analysis method: adaptive Kriging-assisted weight index Monte Carlo Simulation (MCS). The Kriging model is constructed to substitute for expensive finite-element analysis of engineering problem during optimization and reliability analysis. To improve the interpolation accuracy of Kriging, a learning function is adopted in adaptive sampling process. A weight index form of MCS method is proposed to enhance the efficiency of conventional MCS method. Finally, taking the result of conventional MCS as a reference, proposed reliability analysis method is compared with reliability index approach and sensitivity-assisted MCS methods.</P>
Initiating Events Study of the First Extraction Cycle Process in a Model Reprocessing Plant
Wang, Renze,Zhang, Jiangang,Zhuang, Dajie,Feng, Zongyang The Korean Association for Radiation Protection 2016 방사선방어학회지 Vol.41 No.2
Background: Definition and grouping of initiating events (IEs) are important basics for probabilistic safety assessment (PSA). An IE in a spent fuel reprocessing plant (SFRP) is an event that probably leads to the release of dangerous material to jeopardize workers, public and environment. The main difference between SFRPs and nuclear power plants (NPPs) is that hazard materials spread diffusely in a SFRP and radioactive material is just one kind of hazard material. Materials and Methods: Since the research on IEs for NPPs is in-depth around the world, there are several general methods to identify IEs: reference of lists in existence, review of experience feedback, qualitative analysis method, and deductive analysis method. While failure mode and effect analysis (FMEA) is an important qualitative analysis method, master logic diagram (MLD) method is the deductive analysis method. IE identification in SFRPs should be consulted with the experience of NPPs, however the differences between SFRPs and NPPs should be considered seriously. Results and Discussion: The plutonium uranium reduction extraction (Purex) process is adopted by the technics in a model reprocessing plant. The first extraction cycle (FEC) is the pivotal process in the Purex process. Whether the FEC can function safely and steadily would directly influence the production process of the whole plant-production quality. Important facilities of the FEC are installed in the equipment cells (ECs). In this work, IEs in the FEC process were identified and categorized by FMEA and MLD two methods, based on the fact that ECs are containments in the plant. Conclusion: The results show that only two ECs in the FEC do not need to be concerned particularly with safety problems, and criticality, fire and red oil explosion are IEs which should be emphatically analyzed. The results are accordant with the references.
Extract Segmentation Lines of 3D Model based on Regional Discrete Curvature
Hui Jia,Jiangang Zhang 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.1
The discrete curvature is sensitive to the noise and heavy computation of feature value. In order to extract the segmentation lines of 3D meshes, this paper presents a novel and efficient algorithm which is based on regional discrete curvature. Extract prominent feature points, pre-segmentation and then obtain the constraint region. Calculate the curvature degree extremal points within the constraint region, finally utilize the curvature degree extremal points to fit plane which guaid extracting the segmentation lines. This algorithm does not need to wipe off the noise at initial stage, the experiment results show that the proposed algorithm can accurately and frequently yield meaningful segmentation lines for models which has an evident branch structure.
Research on the Evaluation of E-Commerce Logistics in the Cloud Computing Environment
Xiaoping Wang,Jiangang Dong,Jiang Wu,Fan Zhang 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.7
Cloud computing has the advantages of low cost, large scale, general and scalable. In all areas of the social life and the economic life, the cloud computing is widely used. And the emergence of the cloud computing is another revolution in the information society. With the rapid development of e-commerce, the combination of e-commerce and cloud computing has been proved to be a win-win combination. But, there still are many problems of the e-commerce in the cloud computing environment, especially in logistics. In this paper, we establish the e-commerce logistics evaluation system in the cloud computing. And we use the e-commerce logistics evaluation method to evaluate the logistics in the cloud computing based on the improved entropy method. Finally, the experiments show that the proposed method can be effectively applied to the evaluation of e-commerce logistics in the cloud environment and the evaluation results are objective and effective.
Inhibiting N-Cadherin-Mediated Adhesion Affects Gap Junction Communication in Isolated Rat Hearts
Zhu, Hongjun,Wang, Hegui,Zhang, Xiwen,Hou, Xiaofeng,Cao, Kejiang,Zou, Jiangang Korean Society for Molecular and Cellular Biology 2010 Molecules and cells Vol.30 No.3
Cadherin-mediated adherens junctions is impaired concomitant with a decrease in connexin 43 (Cx43) in diseases or pathological processes. We have investigated the acute effects of adherens junction impairment in isolated rat hearts by introducing Ala-His-Ala-Val-Asp-$NH_2$ (AHAVD, a synthetic peptide) as a specific inhibitor of N-cadherin. Effect of AHAVD on N-cadherin mediated adhension was analyzed by Cardiomy-ocyte aggregation assay. Laser confocal microscopy showed disrupted cell-cell contacts in cultured neonatal cardiomyocytes co-incubated with 0.2 mM AHAVD. In isolated adult rat hearts, Cx43 was redistributed along the bilateral of cardiomyocytes from the intercalated discs and significant dephosphorylation of Cx43 on serine368 occurred concomitantly with decreased gap junction (GJ) function in dose dependent manner after 1 h perfusion with AHAVD. These results indicate that impairing cad-herin-mediated adhesion by AHAVD rapidly results in Cx43 redistribution and dephosphorylation of serine368, thereby impairing GJ communication function.
Feng Gang,Lin Jian,Yang Shuai,Zhang Boxuan,Wang Jiangang,Yang Jia,Xu Zhongfeng,Lei Yongping 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.11
Pressure resistance welding is usually used to seal the connection between the cladding tube and the end plug made of zirconium alloy. The seal welded joint has a direct effect on the service performance of the fuel rod cladding structure. In this paper, the pressure resistance welded joints of zirconium alloy tube-plug structure were obtained by thermal-mechanical simulation experiments. The microstructure and microhardness of the joints were both analyzed. The effect of processing parameters on the microstructure was studied in detail. The results showed that there was no β-Zr phase observed in the joint, and no obvious element segregation. There were different types of Widmanst¨atten structure in the thermo-mechanically affected zone (TMAZ) and heat affected zone (HAZ) of the cladding tube and the end plug joint because of the low cooling rate. Some part of the grains in the joint grew up due to overheating. Its size was about 2.8 times that of the base metal grains. Due to the high dislocation density and texture evolution, the microhardnesses of TMAZ and HAZ were both significantly higher than that of the base metal, and the microhardness of the TMAZ was the highest. With the increasing of welding temperature, the proportion of recrystallization in TMAZ decreased, which was caused by the increasing of strain rate and dislocation annihilation
Inhibiting N-Cadherin-Mediated Adhesion Affects Gap Junction Communication in Isolated Rat Hearts
Hongjun Zhu,Hegui Wang,Xiwen Zhang,Xiaofeng Hou,Kejiang Cao,Jiangang Zou 한국분자세포생물학회 2010 Molecules and cells Vol.30 No.3
Cadherin-mediated adherens junctions is impaired conco-mitant with a decrease in connexin 43 (Cx43) in diseases or pathological processes. We have investigated the acute effects of adherens junction impairment in isolated rat hearts by introducing Ala-His-Ala-Val-Asp-NH2 (AHAVD, a synthetic peptide) as a specific inhibitor of N-cadherin. Effect of AHAVD on N-cadherin mediated adhension was analyzed by Cardiomy-ocyte aggregation assay. Laser confocal microscopy showed disrupted cell-cell contacts in cultured neonatal cardiomyocytes co-incubated with 0.2 mM AHAVD. In isolated adult rat hearts, Cx43 was redis-tributed along the bilateral of cardiomyocytes from the intercalated discs and significant dephosphorylation of Cx43 on serine368 occurred concomitantly with decreased gap junction (GJ) function in dose dependent manner after 1 h perfusion with AHAVD. These results indicate that im-pairing cad-herin-mediated adhesion by AHAVD rapidly results in Cx43 redistribution and dephosphorylation of serine368, thereby impairing GJ communication function.