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Three-in-one LaNiO_(3) functionalized separator boosting electrochemical stability and redox kinetics for high-performance Li-S battery

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Journal of Energy Chemistry 2023年第7期82卷 581-591,I0013页

作者： Weiyu Wang Mingxiu Hou Fangqian Han Di Yu Jie Liu Qian Zhang Fengli Yu Lei Wang Maoshuai He State key Laboratory Base of Eco-chemical Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina College of Chemistry and Molecular Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina Weifang key Laboratory of Green Processing of Separator for Chemical Power Sources School of Chemistry and EngineeringWeifang Vocational CollegeWeifang 261108ShandongChina shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection College of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina

The lithium-sulfur(Li-S)battery,as one of the energy storage devices,has been in the limelight due to its high theoretical energy ***,the poor redox kinetics and the"shuttle effect"of polysulfides severely restrict the use of Li-S batteries in practical ***,a novel bimetallic LaNiO_(3) functional material with high electrical conductivity and catalytic property is prepared to act as a high-efficiency polysulfide shuttling *** three LaNiO_(3) samples with different physical/chemical characteristics are obtained by controlling the calcination *** conjunction with the high electrical conductivity and excellent catalytic properties of the as-prepared materials,the appropriate chemisorption toward polysulfides offers great potential to enhance electrochemical stability for highperformance Li-S ***,the Li-S cell with the separator modified by such functional material gives a specific capacity of 658 mA h g^(-1) after 500 cycles at a high current density of 2 *** with high sulfur loading of 6.05 mg cm^(-2),the Li-S battery still exhibits an areal specific capacity of 2.81 m A h cm^(-2)after 150 *** work paves a new avenue for the rational design of materials for separator modification in high-performance Li-S batteries.

关键词： Li-S battery Functional separator Catalytic property Electrochemical stability Redox kinetics

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Application of Principal Component Analysis(PCA)to the Evaluation and Screening of Multiactivity Fungi

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Journal of Ocean University of China 2022年第3期21卷 763-772页

作者： YANG Zonglin SHI Yaqi LI Pinglin PAN Kanghong LI Guoqiang LI Xianguo YAO Shuo ZHANG Dahai key Laboratory of Marine Chemistry Theory and Technology(Ocean University of China) Ministry of EducationQingdao266100China College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao266100China key Laboratory of Marine Drugs Chinese Ministry of EducationSchool of Medicine and PharmacyOcean University of ChinaQingdao266100China Laboratory of Marine Drugs and Biological Products National Laboratory for Marine Science and TechnologyQingdao266100China

Continued innovation in screening methodologies remains important for the discovery of high-quality multiactive fungi,which have been of great significance to the development of new ***-derived fungi,which are well recognized as prolific sources of natural products,are worth sustained attention and further *** this study,118 fungi,which mainly included Aspergillus spp.(34.62%)and Penicillium spp.(15.38%),were isolated from the mangrove ecosystem of the Maowei Sea,and 83.1%of the cultured fungi showed at least one bioactivity in four antibacterial and three antioxidant *** accurately evaluate the fungal bioactivities,the fungi with multiple bioactivities were successfully evaluated and screened by principal component analysis(PCA),and this analysis provided a dataset for comparing and selecting multibioactive *** the 118 mangrove-derived fungi tested in this study,Aspergillus *** the best comprehensive *** such as ***,*** and ***,which exhibited high comprehensive bioactivity as determined by the PCA,have great potential in the exploitation of natural products and the development of new *** study demonstrated the first use of PCA as a time-saving,scientific method with a strong ability to evaluate and screen multiactive fungi,which indicated that this method can affect the discovery and development of new drugs.

关键词： principal component analysis biological activity fungi mangrove ecosystem activity evaluation

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ECG Classification Using Deep CNN Improved by Wavelet Transform

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Computers, Materials & Continua 2020年第9期64卷 1615-1628页

作者： Yunxiang Zhao Jinyong Cheng Ping Zhang Xueping Peng School of Computer science and Technology Qilu University of Technology(Shandong Academy of Sciences)Jinan250353China Centre of Artificial Intelligence University of Technology SydneySydneyNSW 2006Australia

Atrial fibrillation is the most common persistent form of arrhythmia.A method based on wavelet transform combined with deep convolutional neural network is applied for automatic classification of *** the ECG signal is easily inferred,the ECG signal is decomposed into 9 kinds of subsignals with different frequency scales by wavelet function,and then wavelet reconstruction is carried out after segmented filtering to eliminate the influence of noise.A 24-layer convolution neural network is used to extract the hierarchical features by convolution kernels of different sizes,and finally the softmax classifier is used to classify *** paper applies this method of the ECG data set provided by the 2017 PhysioNet/CINC *** cross validation,this method can obtain 87.1%accuracy and the F1 score is 86.46%.Compared with the existing classification method,our proposed algorithm has higher accuracy and generalization ability for ECG signal data classification.

关键词： Atrial fibrillation wavelet transform deep CNN

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Synthesis and Crystal Structure of α-(1,2,4-Triazol-1H-yl)-ρ-chloro Acetophenone, [ClC_6H_4COCH_2(C_2H_2N_3)]

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Chinese Journal of Structural Chemistry 2003年第6期22卷 687-690页

作者：建方方李艳肖海玲孙萍萍 New Materials & Function Coordination Chemistry Laboratory Qingdao University of Science and Technology Qingdao Shandong 266042 China

The title compound [ClC6H4COCH2(C2H2N3)] has been prepared and characterized by elemental analysis, IR spectrum and X-ray studies. It crystallizes in the monoclinic system, space group P21/c with Mr = 221.64 (C10H8ClN3O), a = 13.420(3), b = 9.720(2), c = 7.900(2) ? b = 92.00(3)? V = 1029.9(4) 3, Z = 4, Dc = 1.429 g/cm3, F(000) = 456, m = 0.345 mm-1, R = 0.0435 and wR=0.0894. The total reflections were 1949 and the independent ones were 1805 (Rint=0.0340), of which 800 were observed with I > 2s(I). The crystal structure consists of a-(1,2,4-triazol-1H- yl)-r-chloro-acetophenone. The existence of p conjugated systems in the molecule affects partly the bond lengths. The triazole and phenyl rings form the dihedral angle of 77.34. The molecules of the title compound connect to each other through extensive hydrogen bonds to form a two-dimensional structure. Elemental analysis and IR spectra are in good agreement with the structure data.

关键词： crystal structure a-(1,2,4-triazol-1H-yl)-r-chloro-acetophenone hydrogen bonds network

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Effect of thermodynamic parameters on prediction of phase behavior and process design of extractive distillation

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Chinese Journal of Chemical Engineering 2018年第5期26卷 993-1002页

作者： HuiJia Huixin Wang Kang Ma Mengxiao Yu Zhaoyou Zhu Yinglong Wang College of Chemical Engineering Qingdao University of science and Technology Qingdao 266042 China National Registration Center for Chemicals SINOPEC Research Institute of Safety Engineering Qingdao 266071 China

Extractive distillation was investigated for separation of the minimum azeotrope of n-propanol/water, via the Aspen Plus simulation platform. Experimental data of n-propanol/water, which could pass the thermodynamic consistency test, were regressed to get suitable binary interaction parameters(BIPs) by the UNIQUAC thermodynamic model. The azeotrope system was heterogeneous in the simulation with built-in BIPs, which was contrary to the experimental data. The study focused on the effect of thermodynamic parameters on the prediction of phase behavior, and process design of extractive distillation. N-methyl-2-pyrrolidone(NMP) and ethylene glycol were used as solvents to implement the separation. Processes with built-in and regressed BIPs were explored,based on the minimum total annual cost(TAC). There were significant differences in the phase behavior simulation using different thermodynamic parameters, which showed the importance of BIPs in the design and optimization of extractive distillation.

关键词： Extractive distillation Thermodynamic parameters Phase behavior UNIQUAC TAC

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Synthesis and Molecular Structure of Binuclear Organotin Complex Bridged by Piperazinylbidithiocarbamate Anion

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Chinese Journal of Structural Chemistry 2004年第5期23卷 490-493页

作者： YINHan-Dong WANGChuan-Hua XINGQiu-Ju DepartmentofChemistry LiaochengUniversityLiaochengShandong252059China

The title complex bistri(o-fluorbenzyl)tinpiperazinylbisdithiocarbamate (C48H44- F6N2S4Sn2, Mr = 1128.47) was synthesized by the reaction of tri(o-fluorbenzyl)tin chloride with piperazinylbisdithiocarbamate in 2:1 molar ratio. The structure was characterized by elemental analysis, IR and 1H NMR, and the crystal structure was determined by X-ray single-crystal diffrac- tion. The crystal belongs to triclinic, space group P with a= 10.348(5), b = 10.636(6), c = 13.279(7) , a = 68.445(9), b = 86.763(9), g = 61.278(8)o, Z = 1, V = 1179(1) 3, Dc = 1.589 g/cm3, m = 1.296 mm-1, F(000) = 564, R = 0.0534 and wR = 0.0849. In the complex, the tin atoms are five-coordinate to a distorted tirgonal bipyramidal configuration.

关键词： tri(o-fluorbenzyl)tin piperazinylbisdithiocarbamate crystal structure

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Microbial community diversity in the profile of an agricultural soil in northern China

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Journal of Environmental sciences 2008年第8期20卷 981-988页

作者： Zhou Juan Guo Weihua Wang Renqing Han Xuemei Wang Qiang shandong Univ Sch Life Sci Jinan 250100 Peoples R China Ctr Dis Prevent & Control Jinan Military Command Jinan 250014 Peoples R China

The soil microorganisms at different depths play an important role in soil formation,ecosystem biogeochemistry,recycling of nutrients,and degradation of waste *** aims of this study were to observe the microbial diversity in the profile of an agricultural soil in northern China,and to research the correlation between soil microbes and ***,the soil geochemistry of the profile was investigated through 25 chemical ***,the various physiological groups of microorganisms were...

关键词： BIOLOG geochemical elements microbial diversity soil profile

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Multiscale design and biomechanical evaluation of porous spinal fusion cage to realize specified mechanical properties

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Bio-Design and Manufacturing 2022年第2期5卷 277-293页

作者： Hongwei Wang Yi Wan Quhao Li Xinyu Liu Mingzhi Yu Xiao Zhang Yan Xia Qidong Sun Zhanqiang Liu key Laboratory of High Efficiency and Clean Manufacturing School of Mechanical EngineeringShandong UniversityJinan 250061China National Demonstration Center for Experimental Mechanical Engineering Education School of Mechanical EngineeringShandong UniversityJinan 250061China Department of Orthopedics Qilu Hospital of Shandong UniversityJinan 250012China

Backgrou nd Dense titanium(Ti)fusion cages have been commonly used in transforaminal lumbar interbody ***,the stiffness mismatch between cages and adjacent bone endplates increases the risk of stress shielding and cage *** The current study presents a multiscale optimization approach for porous Ti fusion cage development,including microscale topology optimization based on homogenization theory that obtains a unit cell with prescribed mechanical properties,and macroscale topology optimization that determines the layout of framework structure over the porous cage while maintaining the desired *** biomechanical performance of the designed porous cage is assessed using numerical simulations of fusion *** laser melting is employed to assists with fabricating the designed porous structure and porous *** The simulations demonstrate that the designed porous cage increases the strain energy density of bone grafts and decreases the peak stress on bone *** mechanical and morphological discrepancies between the as-designed and fabricated porous structures are also *** From the perspective of biomechanics,it is demonstrated that the designed porous cage contributes to reducing the risk of stress shielding and cage *** optimization of processing parameters and post-treatments are required to fabricate the designed porous *** present multiscale optimization approach can be extended to the development of cages with other shapes or materials and further types of orthopedic implants.

关键词： Topology optimization Finite element method Porous fusion cage Lumbar spine Selective laser melting

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Enhanced extraction of essential oil from Cinnamomum cassia bark by ultrasound assisted hydrodistillation

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Chinese Journal of Chemical Engineering 2021年第8期34卷 38-46页

作者： Guanghui Chen Fengrui Sun Shougui Wang Weiwen Wang Jipeng Dong Fei Gao key Laboratory of Mutiphase Flow Reaction and Separation Engineering of shandong province College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China Fundamental Chemistry Experiment Center(Gaomi) Qingdao University of Science and TechnologyGaomi 261500China

Cinnamon essential oil with many bioactivities is an important raw material for the production of various chemicals,and the conventional hydrodistillation(HD)for cinnamon oil extraction always require a longer extraction *** this work,ultrasound-assisted hydrodistillation extraction(UAHDE)technique was employed to enhance the extraction efficiency of essential oils from cinnamon *** parameters with significant effects on the essential oil extraction efficiency(ultrasound time,ultrasound power,extraction time,liquid–solid ratio)were optimized,and the proposed UAHDE was compared with the conventional HD extraction in terms of the extraction time,extraction yield,and physicochemical properties of extracted *** to the HD extraction,the UAHDE resulted in a shorter extraction time and a higher extraction *** GC–MS analysis,the UAHDE provided more valuable essential oil with a high content of the vital trans-cinnamaldehyde compounds compared with the *** electron micrograph(SEM)confirmed the efficiency of ultrasound irradiation for cinnamon oil *** addition,the analysis of electric consumption and CO_(2) emission shows that the UAHDE process is a more economic and environment-friendly ***,UAHDE is an efficient and green technology for the cinnamon essential oil extraction,which could improve the quantity and quality of cinnamon oils.

关键词： Cinnamon oil Extraction Ultrasound Distillation Optimization Chemical composition

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Small-time scale network traffic prediction based on a local support vector machine regression model

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Chinese Physics B 2009年第6期18卷 2194-2199页

作者：孟庆芳陈月辉彭玉华 School of Information science and Engineering University of Jinan School of Information science and Engineering Shandong University

In this paper we apply the nonlinear time series analysis method to small-time scale traffic measurement data. The prediction-based method is used to determine the embedding dimension of the traffic data. Based on the reconstructed phase space, the local support vector machine prediction method is used to predict the traffic measurement data, and the BIC-based neighbouring point selection method is used to choose the number of the nearest neighbouring points for the local support vector machine regression model. The experimental results show that the local support vector machine prediction method whose neighbouring points are optimized can effectively predict the small-time scale traffic measurement data and can reproduce the statistical features of real traffic measurements.

关键词： network traffic small-time scale nonlinear time series analysis support vector machine regression model

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