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Three dimensional porous frameworks for lithium dendrite suppression

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Journal of Energy Chemistry 2020年第5期29卷 73-89页

作者： Shuyan Ni shuangshuang Tan Qinyou An Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina

Lithium metal is a promising anode material owing to its very low electrochemical potential and ultrahigh specific ***,the growth of lithium dendrites could result in a short lifespan,low coulombic efficiency,and potential safety hazards during the progress of lithium plating/*** factors drastically hinder its application in lithium metal *** review focuses on the use of three dimensional(3D)porous host frameworks to improve Li plating/stripping behaviors,accommodate the change in volume,and suppress or block lithium dendrite *** 3D porous frameworks,including the conductive carbon-based,metal-based,and lithiophilic inorganic-compound frameworks are introduced and summarized in *** particular functions,relative developments,and optimized strategies of various 3D porous frameworks for lithium deposition/dissolution behaviors are ***,the challenges and promising developments in the field of Li metal anodes will be discussed at the end of this review.

关键词： Lithium metal battery 3D porous frameworks Lithium dendrite Lithium sulfur batteries Lithium oxygen batteries Li plating/stripping

A novel image super-resolution reconstruction algorithm based on improved GANs and gradient penalty

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International Journal of Intelligent Computing and Cybernetics 2019年第3期12卷 400-413页

作者： shuangshuang Liu x.aoling Li Department of Computer Science Nanchang Business College of Jiangxi Agricultural UniversityNanchangChina Department of Information Engineering Gongqing College of Nanchang UniversityGongqingchengChina

Purpose–Conventional image super-resolution reconstruction by the conventional deep learning architectures suffers from the problems of hard training and gradient *** order to solve such problems,the purposeof this paperis to proposea novel image super-resolutionalgorithmbasedon improved generative adversarial networks(GANs)with Wasserstein distance and gradient ***/methodology/approach–The proposed algorithm first introduces the conventional GANs architecture,the Wasserstein distance and the gradient penalty for the task of image super-resolution reconstruction(SRWGANs-GP).In addition,a novel perceptual loss function is designed for the SRWGANs-GP to meet the task of image super-resolution *** content loss is extracted from the deep model’s feature maps,and such features are introduced to calculate mean square error(MSE)for the loss calculation of ***–To validate the effectiveness and feasibility of the proposed algorithm,a lot of compared experiments are applied on three common data sets,***5,Set14 and *** results have shown that the proposed SRWGANs-GP architecture has a stable error gradient and iteratively *** with the baseline deep models,the proposed GANs models have a significant improvement on performance and efficiency for image super-resolution *** MSE calculated by the deep model’s feature maps gives more advantages for constructing contour and ***/value–Compared with the state-of-the-art algorithms,the proposed algorithm obtains a better performance on image super-resolution and better reconstruction results on contour and texture.

关键词： Deep model’s feature maps Generative adversarial networks Gradient penalty,Image super-resolution Wasserstein distance

Effect of samarium doping on the activity and sulfur resistance of Ce/MnFeO_(x) catalyst for low-temperature selective catalytic reduction of NO_(x) by ammonia

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Chinese Journal of Chemical Engineering 2024年第7期71卷 272-282页

作者： Qiyao Zhang shuangshuang Zhang xu Hu Yongmin Huang Key Laboratory of Specially Functional Polymeric Materials and Related Technology School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

The self-made MnFeO_(x) catalysts doped with cerium and samarium were prepared by impregnation method for low-temperature selective catalytic reduction(SCR)by *** this work,the surface properties of the series of MnFe-based catalysts were *** results indicate Sm-modified catalyst have superior low-temperature SCR activity;NO_(x) conversion maintained at nearby to 100%at 90℃ to 240℃.In addition,The N_(2) selectivity of Sm doping remains above 80%in the range of 60℃ to 150℃.In SO_(2) poisoning test,the NO_(x) conversion can be remained>90%after 10 h of *** xPS,NH_(3)-TPD and H_(2)-TPR results show the catalyst with Sm doping enhances the acid sites and oxidation catalytic sites of mixed oxides serves for improving oxygen vacancies and transfer *** situ diffuse reflaxions infrared Fourier transformations spectroscopy(DRIFTS)results show that NO_(x) is more easily adsorbed on the surface after Sm doping,which provided favorable conditions for the NH_(3)-SCR reaction to *** reaction at the catalyst surface will follow the L-H reaction mechanism by transient reaction test.

关键词： SCR Sm doping Catalyst Sulfur resistance In situ DRIFTS Selectivity

Durable superamphiphobic silica aerogel surfaces for the culture of 3D cellular spheroids

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National Science Review 2019年第6期6卷 1255-1265页

作者： Lianyi xu shuangshuang Chen xuemin Lu Qinghua Lu School of Materials Science Institute of Energy Equipment Materials Shanghai Dianji University School of Chemical Science and Engineering Tongji University School of Chemistry and Chemical Engineering State Key Laboratory of Metal Matrix Composite Shanghai Jiao Tong University

The 3D multicellular spheroids with intact cell–cell junctions have major roles in biological research by virtue of their unique advantage of mimicking the cellular physiological environments. In this work, a durable superamphiphobic silica aerogel surface(SSAS) has been fabricated for the upward culture of 3D multicellular spheroids. Poly(3,4-ethylenedioxythiophene)(PEDOT) was first electrodeposited on a conductive steel mesh as a first template for porous silica coating. Soot particles were then applied as a second template to construct a cauliflower-like silica aerogel nanostructure. After fluorination, a hierarchical structure with re-entrant curvature was finally fabricated as a durable superamphiphobic surface. This superamphiphobic surface also presented excellent antifouling towards biomacromolecules and cells, which has been demonstrated by the successful upward culture of cell spheroids. The upward culture makes the observation of cellular behavior in situ possible, holding great potential for 3D cellular evaluation in vitro.

关键词： cell spheroids superamphiphobicity durability electrochemistry silica aerogel

Quasi-Newton method based control design for unknown nonlinear systems with input constraints

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Science China(Information Sciences) 2020年第5期63卷 224-226页

作者： shuangshuang xIONG Zhongsheng HOU Chenkun YIN Advanced Control Systems Lab School of Electronic and Information EngineeringBeijing Jiaotong University School of Automation Qingdao University

Dear editor,With the development in digital computers, various and huge data of controlled plants are obtained and stored, which has led to a rapid growth in the application of numerical methods in controller design. In recent years, the quasi-Newton method [1, 2], as one of the powerful numerical methods which has superlinear convergence speed

关键词： Newton Quasi-Newton method based control design for unknown nonlinear systems with input constraints

Transformation mechanism of nutrient elements in the process of biochar preparation for returning biochar to soil

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Chinese Journal of Chemical Engineering 2017年第4期25卷 477-486页

作者： shuangshuang Tian Zhongxin Tan Alfreda Kasiuliene Ping Ai College of Resources and Environment HuazhongAgricultural UniversityWuhan 430070China Waste Science and Technology Department of CivilEnvironmental and Natural Resources EngineeringLulea University of TechnologySE-97187 LuleaSweden College of Engineering Huazhong Agricultural UniversityWuhan 430070China

Returning biochar to soil is a heavily researched topic because biochar functions well for soil improvement. There is a significant loss of nutrients, which occurs during biochar preparation before biochar is returned to soil,thereby seriously undermining biochar＇s efficacy. Therefore, the transformation mechanisms of biochar p H,mass, nutrients and metals during pyrolysis under different atmospheres and temperatures were studied such that the best method for biochar preparation could be developed. Several conclusions can be reached：（1） a CO2 atmosphere is better than a N2 atmosphere for biochar preparation, although preparation in a CO2 atmosphere is not a common practice for biochar producers;（2） 350 ℃is the best temperature for biochar preparation because the amount of nutrient loss is notably low based on the premise of straw transferred into biochar; and（3） transforming mechanisms of pH, N, P and K are also involved in the biochar preparation process.

关键词： nutrient Transformation pyrolysis seriously alkaline premise kinetics notably thereby volatile

Improvement of the activity and SO_(2) tolerance of Sb-modified Mn/PG catalysts for NH_(3)-SCR at a low temperature

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Journal of Environmental Sciences 2021年第3期33卷 1-15页

作者： x.anlong Zhang shuangshuang Lv xincheng Zhang Kesong x.ao xueping Wu School of Chemistry and Chemical Engineering Hefei University of TechnologyHefei 230009China Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering Hefei University of TechnologyHefei 230009China Instrumental Analysis Center Hefei University of TechnologyHefei 230009China

A series of MnM/palygorskite(PG)(M=La,W,Mo,Sb,Mg)catalysts was prepared by the wetness co-impregnation method for low-temperature selective catalytic reduction(SCR)of NO with NH_*** efficiency followed the order Sb>Mo>La>W>Mg.A combination of various physico-chemical techniques was used to investigate the influence of Sb-modified Mn/PG ***_(0.156)/PG catalyst showed highest NO conversion at low temperatures in the presence of SO_(2) which reveals that addition of Sb oxides effectively enhances the SCR activity of catalysts.A SO_(2) step-wise study showed that MnSb_(0.156)/PG catalyst displays higher durable resistance to SO_(2) than Mn/PG catalyst,where the sulfating of active phase is greatly inhibited after Sb *** electron microscopy and x-ray diffraction results showed that Sb loading enhances the dispersion of Mn oxides on the carrier *** to the results of characterization analyses,it is suggested that the main reason for the deactivation of Mn/PG is the formation of manganese sulfates which cause the permanent deactivation of Mn-based *** Sb-doped Mn/PG catalyst,SO_(x) ad-species formed were mainly combined with SbO_(x) rather than MnO_(x).This preferential interaction between SbO_(x) and SO_(2) effectively shields the MnO_(x) as active species from being sulfated by SO_(2) resulting in the improvement of SO_(2) tolerance on Sb-added *** information support that,owing to the addition of Sb,original formed MnO_(x) crystallite has been completely transformed into highly dispersed amorphous phase accounting for higher SCR activity.

关键词： Manganese oxides Antimony oxides Low-temperature SCR Metal sulfates Sponge-like structure

Comparative study of mining methods for reserves beneath end slope in flat surface mines with ultra-thick coal seams

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International Journal of Mining Science and Technology 2017年第6期27卷 1065-1071页

作者： Zha Zhengao Ma Li Li Kemin Ding x.aohua x.ao shuangshuang School of Mines China University of Mining and Technology Xuzhou 221116 China School of Energy Engineering Xi’an University of Science and Technology Xi’an 710054 China State Key Laboratory for Geomechanics & Deep Underground Engineering China University of Mining and Technology Xuzhou 221116 China

The paper aims to identify a reasonable method for mining ultra-thick coal seams in an end-slope in surface mine, With a case study of Heidaigou surface coal mine(HSCM), the paper conducted a comparative research on three mining methods, namely Underground Mining Method(UMM), Highwall Mining System(HMS) and Local Steep Slope Mining Method(LSSMM). A model was firstly established to simulate the impact that UMM and HMS exert on monitoring points and surface deformation. The way that stripping and ex.avation amount varies with different slope angle, and the corresponding end slope stability were analyzed in the mode of LSSMM. Then a TOPSIS model was established by taking into account six indicators such as recovery ratio, technical complexity and adaptability, the impact on surface mining production, production safety and economic benefits. Finally, LSSMM was determined as the best mining method for mining ultra-thick coal seams in end slope in HSCM.

关键词： Ultra-thick coal seam End wall in surface mine Highwall Mining System Local steep slope Resource exploitation

Plastic zone analysis and support optimization of shallow roadway with weakly cemented soft strata

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International Journal of Mining Science and Technology 2015年第3期25卷 395-400页

作者： Zhang Jihua Wang Lianguo Li Qinghai Zhu shuangshuang State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and Technology School of Mechanics & Civil Engineering China University of Ming and Technology College of Resources and Environmental Engineering Shandong University of Science and Technology

Based on a shallow roadway with weakly cemented soft strata in western China, this paper studies the range and degree of plastic zones in soft strata roadways with weak cementation. Geological radars were used to monitor the loose range and level of surrounding rocks. A mechanical model of weakly cemented roadway was established, including granular material based on the measured results. The model was then used to determine the plastic zone radium. The predicted results agree well with measured results which provide valuable theoretical references for the analysis of surrounding rock stability and support reinforcing design of weakly cemented roadways. Finally, a combined supporting scheme of whole section bolting and grouting was proposed based on the original supporting scheme. It is proved that this support plan can effectively control the deformation and plastic zone ex.ansion of the roadway surrounding rock and thus ensure the long-term stable and safe mining.

关键词： Shallow coal seam Weakly cemented soft strata Granular material Geological radar Whole section bolting and grouting Combined supporting