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Electrochemical degradation of reactive brilliant red X-3B with the(CeO_2/C)-β-PbO_2-PTFE composite electrode

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Journal of Rare Earths 2016年第5期34卷 507-520页

作者：孙鹏哲陈东辉 College of Chemical and Environmental Engineering Shanghai Institute of Technology

The（CeO2/C）-β-PbO2-PTFE composite electrodes modified by graphite powder,cerium oxide powder,polytetrafluoroethylene（PTFE）and the homemade β-PbO2 powder were prepared by the high pressure molding *** X-ray diffraction（XRD）was used to test the purity of the homemade β-PbO2 *** surface structure and electrical property of electrodes were characterized by using scanning electron microscopy（SEM）and the cyclic voltammetry curves（CV）.Those images indicated that in electrolysis the（CeO2/C）-β-PbO2-PTFE composite electrodes had higher activity than the β-PbO2-PTFE electrodes,as good as the excellent catalytic *** the electrode system the composite electrodes were applied to treat reactive brilliant red（RBR）X-3B solution and we studied the degradation influence factors and the reaction *** results showed that the electrode system was well in treating RBR X-3B solution with the 20%（CeO2/C）-β-PbO2-PTFE composite electrodes at the initial 100 mg/L RBR X-3B concentration,Na2SO4 concentration of 0.35 mol/L,the constant current density of 30 mA/cm~!2 and electrolyte pH =*** electrolytic time of 90 min,the maximum decolorization and chemical oxygen demand（COD）removal rates reached 88.92% and 54.54%.And the decolorization rate of RBR X-3B was in conformity with pseudo-first-order kinetics *** RBR X-3B degradation mechanism in the electrochemical oxidation system was used with LC-MS to analyze the possible intermediates and degradation pathway.

关键词： CeO2 PbO2 reactive brilliant red X-3B chemical oxygen demand decolorization rare earths

Preparation of Ce3+doped Bi2O3 hollow needle-shape with enhanced visible-light photocatalytic activity

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Journal of Rare Earths 2019年第7期37卷 726-731页

作者： Wenwen Zhang Shaomin Gao Donghui Chen College of Environmental Science and Engineering Donghua UniversityShanghai 201620China College of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai 201418China

Ce3+ doped Bi2O3 hollow needle-shape with enhanced visible-light photocatalytic activity was successfully prepared via the method of chemical precipitation using Bi(NO3)·5H2O and Ce(NO3)3·6H2O as the source of bismuth and cerium, HNO3 as solvent and NaOH as precipitants, respectively and after calcination at 500 ℃ for 2 h. The morphology and elemental composition,crystal form,purity and specific surface area of the hollow needle Bi2O3 were characterized by SEM-EDS, XRD, BET and FT-IR. The photocatalytic properties of the as-obtained samples were measured by UV-vis diffuse reflection spectroscopy and photochemical reactor. As a result, the obtained Bi2O3 hollow needle-shape doped with 5 wt% Ce shows good morphology, α-phase, stronger absorbent for visible light and good photocatalytic property. Under the simulated visible light of 300 W, the photodegradation rate of tetracycline over HNBCe can reach to 89.1%,which is higher than that of commercial Bi2O3 nanoparticles and Bi2O3 hollow needle-shape.

关键词： Needle-shape Bi2O3 Precipitation method Tetracycline Rare earths

Loofah sac-like three-dimensional interwoven network composed of Van-PEG-MWCNTs for rapid and efficient capture of Staphylococcus aureus

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Food Bioscience 2023年第2期52卷 1249-1257页

作者： Yu Chen Yong Liu Qingfeng Dong Min Fan Li Li College of Food Science and Technology Shanghai Ocean UniversityShanghai201306China Engineering Research Center of Food Thermal-Processing Technology Shanghai201306China shanghai Engineering Research Center of Aquatic-Product Processing&Preservation Shanghai201306PR China

In this work,a three-dimensional interwoven network composed of Van-PEG-MWCNTs was successfully constructed for the capture of Staphylococcus *** capture behavior of this network against Staphylococcus aureus in simulated solution and real milk was *** Van-PEG on carbon nanotubes endowed carbon nanotubes with activity against Staphylococcus aureus,and improved the dispersibility of carbon nanotubes in solution system at the same time,so that they can be suspended in solution uniformly and form a loofah-like three-dimensional structure,enabling the grafted complex to capture Staphylococcus aureus efficiently in the solution system,even the low-level target bacteria can also be *** results showed that Van-PEG-MWCNTs played a role as molecular probes that can identify and capture Staphylococcus aureus from phosphate-buffered saline solution and fresh milk samples with a LOD of 2×10^(1) CFU/*** study demonstrated the potential application value of Van-PEG-MWCNTs for rapid and efficient detection of Staphylococcus aureus.

关键词： Carbon nanotubes Graft Capture Vancomycin Milk

Semantic Segmentation Using DeepLabv3+ Model for Fabric Defect Detection

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Wuhan University Journal of Natural Sciences 2022年第6期27卷 539-549页

作者： ZHU Runhu XIN Binjie DENG Na FAN Mingzhu School of Electronic and Electrical Engineering Shanghai University of Engineering ScienceShanghai 201620China School of Textile and Fashion Technology Shanghai University of Engineering ScienceShanghai 201620China

Currently, numerous automatic fabric defect detection algorithms have been proposed. Traditional machine vision algorithms that set separate parameters for different textures and defects rely on the manual design of corresponding features to complete the detection. To overcome the limitations of traditional algorithms, deep learning-based correlative algorithms can extract more complex image features and perform better in image classification and object detection. A pixel-level defect segmentation methodology using DeepLabv3+, a classical semantic segmentation network, is proposed in this paper. Based on ResNet-18,ResNet-50 and Mobilenetv2, three DeepLabv3+ networks are constructed, which are trained and tested from data sets produced by capturing or publicizing images. The experimental results show that the performance of three DeepLabv3+ networks is close to one another on the four indicators proposed(Precision, Recall, F1-score and Accuracy), proving them to achieve defect detection and semantic segmentation, which provide new ideas and technical support for fabric defect detection.

关键词： fabric defect detection semantic segmentation deep learning DeepLabv3+

Dynamic Response of Offshore Wind Turbine on 3×3 Barge Array Floating Platform under Extreme Sea Conditions

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China Ocean Engineering 2021年第2期35卷 186-200页

作者： LIU Qing-song MIAO Wei-pao YUE Min-nan LI Chun WANG Bo DING Qingwei School of Energy and Power Engineering University of Shanghai for Science and TechnologyShanghai 200093China shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering Shanghai 200093China

Offshore wind farm construction is nowadays state of the art in the wind power generation ***,deep water areas with huge amount of wind energy require innovative floating platforms to arrange and install wind turbines in order to harness wind energy and generate *** conventional floating offshore wind turbine system is typically in the state of force imbalance due to the unique sway characteristics caused by the unfixed foundation and the high center of gravity of the ***,a floating wind farm for 3×3 barge array platforms with shared mooring system is presented here to increase stability for floating *** NREL 5 MW wind turbine and ITI Energy barge reference model is taken as a basis for this ***,the unsteady aerodynamic load solution model of the floating wind turbine is established considering the tip loss,hub loss and dynamic stall correction based on the blade element momentum(BEM)*** second development of AQWA is realized by FORTRAN programming language,and aerodynamic-hydrodynamic-Mooring coupled dynamics model is established to realize the algorithm solution of the ***,the 6 degrees of freedom(DOF)dynamic response of single barge platform and barge array under extreme sea condition considering the coupling effect of wind and wave were observed and investigated in *** research results validate the feasibility of establishing barge array floating wind farm,and provide theoretical basis for further research on new floating wind farm.

关键词： Barge floating platform extreme sea conditions dynamic response stability

Vibration of Axle Box from Wheel Diameter Difference in Vehicle

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Journal of shanghai Jiaotong university(Science) 2020年第4期25卷 509-518页

作者： CHENG Daolai XU Lei SUN Xiaojie School of Mechanical Engineering Shanghai Institute of TechnologyShanghai 201418China School of Railway Transportation Shanghai Institute of TechnologyShanghai 201418China

The wheel diameter difference would worsen the dynamic performance and affect the safety of the rail ***,it is necessary to detect wheel diameter difference while the train is ***,several existing detection methods can’t accurately detect and diagnose the wheel diameter difference under highspeed running *** this study,a new method of detecting wheel diameter difference was proposed for high speed rail *** wheel diameter difference would be diagnosed by the amplitude and frequency of vibration impact on the axle ***,the dynamic model with varying wheel diameters was established in SIMPACK,and LMA tread was used in high-speed rail ***,the simulation results of rail vehicle dynamic performance were compared under different wheel diameter *** that,the relationship between axle box vibration and wheel diameter difference was used to demonstrate the feasibility of this detection ***,comparing and analyzing the simulation results of vibration obtained by matching treads with different wheel diameters,it shows that by increasing the wheel diameter difference,the longitudinal and lateral impacts on axle boxes increase asymmetrically,and the amplitude and the frequency become more ***,this paper presents a technical scheme of online measuring wheel diameter difference by monitoring the vibration of the axle box.

关键词： wheel diameter difference axle box dynamic simulation vibration characteristics

Pyridine terminated polyurethane dendrimer/chlorinated butyl rubber nanocomposites with excellent mechanical and damping properties

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Chinese Journal of Chemical Engineering 2023年第1期53卷 211-221页

作者： Jiacheng Chen Jincheng Wang Shuhong Li Kailing Xiang Shiqiang Song College of Chemistry and Chemical Engineering Shanghai University of Engineering ScienceShanghai 201620China

Due to the special viscoelastic property, traditional rubber with high performance has been widely used in human life and production. However, it is challenging to improve the damping property without sacrificing the extensibility. In this work, a novel type of second-generation polyurethane dendrimer terminated with pyridine(G2-Py) was synthesized by using thiolactone chemistry and subsequently complexed with Zn ions. The structure and morphology of G2-Py were characterized. G2-Py-Zn2+was then mixed with chlorinated butyl rubber(CIIR) by a two-roll mill. A series of CIIR/G2-Py-Zn2+elastomers were obtained through vulcanization. CIIR/G2-Py-Zn2+elastomers could achieve high stretchability(a strain of ~1035%), high mechanical strength(a tensile stress of 7.64 MPa). This was benefitted from the friction between G2-Py and CIIR as well as variety of non-covalent bonds provided by G2-Py-Zn2+,which can dissipate energy to further improve the strength and extensibility. The coordination of Zn2+-pyridine was confirmed by Fourier transform infrared spectroscopy, stress relaxation and cycle tensile test. To further investigate the morphology and damping properties of the elastomers, scanning electron microscopy and dynamic mechanical analysis were performed. CIIR-5 showed the best damping performance with higher tan δ_(max) and wider effective damping temperatures. Therefore, this dendrimer modification technology provides wider applications for CIIR elastomers in daily life.

关键词： Coordination bonds Hydrogen bonds Polyurethane dendrimer Nanostructure Polymers Composites

Key Techniques and Applications of Adaptive Growth Method for Stiffener Layout Design of Plates and Shells

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Chinese Journal of Mechanical Engineering 2013年第6期26卷 1138-1148页

作者： DING Xiaohong JI Xuerong MA Man HOU Jianyun School of Mechanical Engineering University of Shanghai for Science and Technology Pan Asia Technical Automotive Center Co. Ltd.

The application of the adaptive growth method is limited because several key techniques during the design process need manual intervention of designers. Key techniques of the method including the ground structure construction and seed selection are studied, so as to make it possible to improve the effectiveness and applicability of the adaptive growth method in stiffener layout design optimization of plates and shells. Three schemes of ground structures, which are comprised by different shell elements and beam elements, are proposed. It is found that the main stiffener layouts resulted from different ground structures are almost the same, but the ground structure comprised by 8-nodes shell elements and both 3-nodes and 2-nodes beam elements can result in clearest stiffener layout, and has good adaptability and low computational cost. An automatic seed selection approach is proposed, which is based on such selection rules that the seeds should be positioned on where the structural strain energy is great for the minimum compliance problem, and satisfy the dispersancy requirement. The adaptive growth method with the suggested key techniques is integrated into an ANSYS-based program, which provides a design tool for the stiffener layout design optimization of plates and shells. Typical design examples, including plate and shell structures to achieve minimum compliance and maximum bulking stability are illustrated. In addition, as a practical mechanical structural design example, the stiffener layout of an inlet structure for a large-scale electrostatic precipitator is also demonstrated. The design results show that the adaptive growth method integrated with the suggested key techniques can effectively and flexibly deal with stiffener layout design problem for plates and shells with complex geometrical shape and loading conditions to achieve various design objectives, thus it provides a new solution method for engineering structural topology design optimization.

关键词： adaptive growth method stiffener layout design plates and shells growth mechanism natural branch system

Effect of germinating quinoa flour on wheat noodle quality and changes in blood glucose

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Food Bioscience 2022年第4期48卷 594-600页

作者： Ying Zhang Zhimin Ma Hongwei Cao Kai Huang Xiao Guan School of Health Science and Engineering University of Shanghai for Science and TechnologyShanghai200093PR China National Grain Industry(Urban Grain and Oil Security)Technology Innovation Center Shanghai200093PR China

Germinated quinoa flour has been proven to be rich in a variety of nutrients,in order to improve the nutritional value and reduce the glycemic index of wheat noodle,20%(w/w)of white quinoa(WQ),red quinoa(RQ),black quinoa(BQ)powder with different germination time were added to wheat *** gemination rate,sprout length,digestion ratio and microstructure of WQ,RQ,and BQ were ***,the characteristics of cooking,texture,digestion and blood glucose of noodles were *** was found that the addition of quinoa flour(WQ-0,WQ-1,RQ-0,RQ-1,BQ-0,BQ-3)maintained the cooking and texture characteristics of wheat ***,WQ-1,RQ-1,BQ-3 reduced the optimal cooking time and starch digestibility compared with wheat *** the same time,it showed that the addition of WQ-1,BQ-3 significantly reduced the area under the blood glucose curve(AUC)to 132.17,126.83(mmol/L)⋅h,*** correlation analysis verified that the digestion ratio was significantly positively correlated with AUC(p<0.01).It will provide the theoretical basis for the development of new quinoa foods that lower blood sugar.

关键词： Quinoa germination Noodle quality Digestive properties Blood glucose