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Adsorption and recycling of Cd(II) from wastewater using straw cellulose hydrogel beads
Fudong Wang,Jin Li,Yuan Su,Qian Li,Baoyu Gao,Qinyan Yue,Weizhi Zhou 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-
Environment-friendly straw cellulose hydrogel beads (SCHBs) were applied for Cd(II) recovery andrecycling from solution. The SCHBs presented good adsorption capacity for Cd(II) of 95.62 mg/g at 313.5 K. These Cd(II) loaded SCHBs were recycled for CdS in-situ synthesis and employed as photocatalyst in thedegradation of methylene blue under visible light irradiation. Both TEM and SEM images confirmed thatthe recycled CdS nanoparticles within SCHBs are smaller than 20 nm in size, and XRD patterns wereconsistent with the metallic crystallinity of CdS. The recycled SCHBs-CdS composites exhibited excellentphotocatalytic degradation ability and reusability.
王福?(Wang Fudong) 동아인문학회 2017 동아인문학 Vol.39 No.-
All of the record about Koguryo Buddhist master Ding and his poetry in Chinese ancient books are wrong. This paper corrects those mistake, and gives a close answer to the original version of this poetry, analyses on the environment when the writer created his poetry. Finally, this paper translates this poetry and show some main evaluations on it.
A Novel Face Template Protection Algorithm Based on the Fusion of Chaos Theory and RSA Encryption
Liu Yunan,Zhao Fudong,Xu Yanli,Cao Yu 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.6
In the face recognition system, the protection of the facial feature template has already become the most important part. In view of that the current protection methods cannot meet the security and the matching rate simultaneously, a hybrid encryption algorithm was proposed in this paper fusing chaotic encryption and RSA encryption to solve this problem. After the preprocessing to the ORL face database, the feature template was extracted by 2D2LDA and PCA in the non-transformation domain. Then we applied the scrambling encryption and RSA encryption to obtain the final security template. At last, a system with the nearest neighbor classifier and Euclidean distance was used for the matching verification. The experimental results showed that this hybrid encryption method was feasible, effective and easy transplantation with no matching rate reduction.
Dynamic analysis of high-speed railway train-bridge system after barge collision
Chaoyi Xia,Qin Ma,Fudong Song,Xuan Wu,He Xia 국제구조공학회 2018 Structural Engineering and Mechanics, An Int'l Jou Vol.67 No.1
In this paper, a framework is proposed for dynamic analysis of train-bridge systems with a damaged pier after barge collision. In simulating the barge-pier collision, the concrete pier is considered to be nonlinear-inelastic, and the barge-bow is modeled as elastic-plastic. The changes of dynamic properties and deformation of the damaged pier, and the additional unevenness of the track induced by the change of deck profile, are analyzed. The dynamic analysis model for train-bridge coupling system with a damaged pier is established. Based on the framework, an illustrative case study is carried out with a 5×32 m simply-supported PC box-girder bridge and the ICE3 high-speed train, to investigate the dynamic response of the bridge with a damaged pier after barge collision and its influence on the running safety of high-speed train. The results show that after collision by the barge, the vibration properties of the pier and the deck profile of bridge are changed, forming an additional unevenness of the track, by which the dynamic responses of the bridge and the car-body accelerations of the train are increased, and the running safety of high-speed train is affected.
Dynamic analysis of high-speed railway train-bridge system after barge collision
Xia, Chaoyi,Ma, Qin,Song, Fudong,Wu, Xuan,Xia, He Techno-Press 2018 Structural Engineering and Mechanics, An Int'l Jou Vol.67 No.1
In this paper, a framework is proposed for dynamic analysis of train-bridge systems with a damaged pier after barge collision. In simulating the barge-pier collision, the concrete pier is considered to be nonlinear-inelastic, and the barge-bow is modeled as elastic-plastic. The changes of dynamic properties and deformation of the damaged pier, and the additional unevenness of the track induced by the change of deck profile, are analyzed. The dynamic analysis model for train-bridge coupling system with a damaged pier is established. Based on the framework, an illustrative case study is carried out with a $5{\times}32m$ simply-supported PC box-girder bridge and the ICE3 high-speed train, to investigate the dynamic response of the bridge with a damaged pier after barge collision and its influence on the running safety of high-speed train. The results show that after collision by the barge, the vibration properties of the pier and the deck profile of bridge are changed, forming an additional unevenness of the track, by which the dynamic responses of the bridge and the car-body accelerations of the train are increased, and the running safety of high-speed train is affected.