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Comparison of analytical procedures for measuring phosphorus content of animal manures in China

Guohua LI, Qian LIU, Haigang LI, Fusuo ZHANG

Frontiers of Agricultural Science and Engineering 2019, Volume 6, Issue 4,   Pages 431-440 doi: 10.15302/J-FASE-2019279

Abstract: <p>The concentration and components of manure phosphorus (P) are key factors determining potential Pproduction systems in several areas of China was investigated with sequential fractionation and a simplifiedThe mean total P concentration, determined by the sequential fractionation procedure of intensive swine(i.e., P extracted by H O and NaHCO ) and 78% in extensive cattle manure.p>

Keywords： diet phosphorus     manure phosphorus     sequential P fractionation    

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Continuous size fractionation of magnetic nanoparticles by using simulated moving bed chromatography

Carsten-Rene Arlt, Dominik Brekel, Stefan Neumann, David Rafaja, Matthias Franzreb

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5,   Pages 1346-1355 doi: 10.1007/s11705-021-2040-3

Abstract: The size fractionation of magnetic nanoparticles is a technical problem, which until today can only beUsing magnetic chromatography, we show a promising method for fractionation of magnetic nanoparticlesSince the strength of this interaction is related to particle size, the principle is suitable for size fractionationeasy scalability of continuous chromatography, the process is a promising approach for the efficient fractionation

Keywords： magnetic chromatography     simulated moving bed chromatography     magnetic nanoparticles     size fractionation    

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Optimal dynamic emergency reserve activation using spinning, hydro and demand-side reserves

Surender REDDY,P. R. BIJWE,A. R. ABHYANKAR

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 409-423 doi: 10.1007/s11708-016-0431-9

Abstract: demonstrate the advantage of the proposed integrated/dynamic reserve activation plan over the conventional/sequential

Keywords： demand-side reserves     dynamic reserve activation approach     hydro power units     post contingency     sequential    

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Control strategies for disinfection byproducts by ion exchange resin, nanofiltration and their sequential

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 10, doi: 10.1007/s11783-023-1725-x

Abstract: <p>● Effects of AER adsorption and NF on DBP precursors, DBPs, and TOX

Keywords： Disinfection byproducts     Control     Anion exchange resin     Nanofiltration     Cytotoxicity    

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mechanisms of diphenylarsinic acid on natural magnetite and siderite: Evidence from sorption kinetics, sequential

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 9, doi: 10.1007/s11783-022-1547-2

Abstract: <p>• DPAA sorption followed pseudo-secondary and intra-particle diffusion

Keywords： Diphenylarsinic acid (DPAA)     Sorption     Magnetite     Siderite     Sequential extraction     EXAFS    

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A “Sequential Design of Simulations” approach for exploiting and calibrating discrete element simulations

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6,   Pages 874-885 doi: 10.1007/s11705-021-2131-1

Abstract: variety of consolidation conditions, which verifies the advantages and feasibility of using the proposed “Sequential

Keywords： discrete element method     cohesive materials     parameter calibration     ring shear cell     design of experiments    

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Variation in humic and fulvic acids during thermal sludge treatment assessed by size fractionation, elementary

Yuning YANG,Huan LI,Jinyi LI

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 6,   Pages 854-862 doi: 10.1007/s11783-014-0755-9

Abstract: Thermal pretreatment can be applied to sludge anaerobic digestion or dewatering. To analyze the variation in humic substances during thermal sludge treatment, sludge humic and fulvic acids were extracted before and after 30-min thermal treatment at 180°C, and then their contents, molecular weight distributions, elementary compositions, and spectral characteristics were compared. The results showed that the total contents of humic and fulvic acids in the sludge almost remained constant during thermal treatment, but 35% of humic and fulvic acids were dissolved from the sludge solids. Moreover, both humic and fulvic acids were partly decomposed and 32% of humic acids were converted to fulvic acids. The median value of the molecular weights of humic acids decreased from 81 to 41 kDa and that of fulvic acids decreased from 15 to 2 kDa. Besides the reduction in molecular size, the chemical structures of humic and fulvic acids also exhibited a slight change, i.e. some oxygen functional groups disappeared and aromatic structures increased after thermal sludge treatment.

Keywords： sludge     thermal treatment     humic acids     fulvic acids    

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Impact of selection of DC base values and DC link control strategies on sequential AC-DC power-flow convergence

Shagufta KHAN,Suman BHOWMICK

Frontiers in Energy 2015, Volume 9, Issue 4,   Pages 399-412 doi: 10.1007/s11708-015-0374-6

Abstract: The sequential method is used to solve the DC variables in the Newton Raphson (NR) power flow model,

Keywords： AC-DC power-flow     Newton-Raphson method     high voltage direct current (HVDC) control strategy    

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Comparison of sequential with intimate coupling of photolysis and biodegradation for benzotriazole

Shunan Shan, Yuting Zhang, Yining Zhang, Lanjun Hui, Wen Shi, Yongming Zhang, Bruce E. Rittmann

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 6, doi: 10.1007/s11783-017-0953-3

Abstract: Sequential and intimate coupling of UV-photolysis with biodegradation were investigated for their impactsExperiments with sequential coupling showed that BTA biodegradation was accelerated by photolytic pretreatment

Keywords： Benzotriazole     Photolysis     Biodegradation     Inhibition     Electron donor    

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Thermodynamic analysis of ethanol synthesis from hydration of ethylene coupled with a sequential reaction

Jie Gao, Zhikai Li, Mei Dong, Weibin Fan, Jianguo Wang

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 847-856 doi: 10.1007/s11705-019-1848-6

Abstract: Coal-based ethanol production by hydration of ethylene is limited by the low equilibrium ethylene conversion at elevated temperature. To improve ethylene conversion, coupling hydration of ethylene with a potential ethanol consumption reaction was analyzed thermodynamically. Five reactions have been attempted and compared: (1) dehydration of ethanol to ethyl ether ( ), (2) dehydrogenation of ethanol to acetaldehyde ( ), (3) esterification of acetic acid with ethanol ( ), (4) dehydrogenation of ethanol to ethyl acetate ( ), and (5) oxidative dehydrogenation of ethanol to ethyl acetate ( ). The equilibrium constants and equilibrium distributions of the coupled reactions were calculated and the effects of feed composition, temperature and pressure upon the ethylene equilibrium conversion were examined. The results show that dehydrogenation of ethanol to acetaldehyde has little effect on ethylene conversion, whereas for dehydrogenation of ethanol to acetaldehyde and ethyl acetate, ethylene conversion can be improved from 8% to 12.8% and 18.5%, respectively, under conditions of H O/C H = 2, 10 atm and 300°C. The esterification of acetic acid with ethanol can greatly enhance the ethylene conversion to 22.5%; in particular, ethylene can be actually completely converted to ethyl acetate by coupling oxidative dehydrogenation of ethanol.

Keywords： ethylene     ethanol     thermodynamics     coupling    

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Successful management of seven cases of critical COVID-19 with early noninvasive–invasive sequential

Mian Peng, Xueyan Liu, Jinxiu Li, Di Ren, Yongfeng Liu, Xi Meng, Yansi Lyu, Ronglin Chen, Baojun Yu, Weixiong Zhong

Frontiers of Medicine 2020, Volume 14, Issue 5,   Pages 674-680 doi: 10.1007/s11684-020-0796-3

Abstract: the patients were admitted to the intensive care unit, where they received early noninvasive–invasive sequentialthat good outcomes for patients with critical COVID-19 can be achieved with early noninvasive–invasive sequential

Keywords： COVID-19     noninvasive–invasive sequential ventilation     bundle pharmacotherapy    

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Selectively structural fractionation and economical-functionality conversion of lignocellulosic biomass

Chen Hongzhang,Qiu Weihua and Wang Lan

Strategic Study of CAE 2014, Volume 16, Issue 3,   Pages 27-36

Abstract: <p>In this paper，an innovative biomass- refining path called“selective- fractionation and economical-functionalityIn conclusion，“selective- fractionation and economical-functionality”of lignocellulosic materialsp>

Keywords： biorefining     heterogeneity of raw material     selective-fractionation and economical-functionality     industrialized    

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P2P energy trading via public power networks: Practical challenges, emerging solutions, and the way forward

Frontiers in Energy 2023, Volume 17, Issue 2,   Pages 189-197 doi: 10.1007/s11708-023-0873-9

Abstract: Peer-to-peer (P2P) energy trading is an emerging energy supply paradigm where customers with distributedP2P energy trading can facilitate local power and energy balance, thus being a potential way to manageIt is of great importance to explore P2P energy trading via public power networks, to which most DERsIn this paper, the practical challenges of conducting P2P energy trading via public power networks areFinally, the way forward for facilitating P2P energy trading via public power networks is proposed.

Keywords： distribution network     local virtual private network     network charges     peer-to-peer (P2P) energy trading    

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Deep Sequential Feature Learning in Clinical Image Classification of Infectious Keratitis Article

Yesheng Xu, Ming Kong, Wenjia Xie, Runping Duan, Zhengqing Fang, Yuxiao Lin, Qiang Zhu, Siliang Tang, Fei Wu, Yu-Feng Yao

Engineering 2021, Volume 7, Issue 7,   Pages 1002-1010 doi: 10.1016/j.eng.2020.04.012

Abstract: <p>Infectious keratitis is the most common condition of corneal diseases in which a pathogen grows inIn a comparison, the performance of the proposed sequential-level deep model achieved 80% diagnosticp>

Keywords： Deep learning     Corneal disease     Sequential features     Machine learning     Long short-term memory    

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Title Author Date Type Operation

Comparison of analytical procedures for measuring phosphorus content of animal manures in China

Guohua LI, Qian LIU, Haigang LI, Fusuo ZHANG

Journal Article

Continuous size fractionation of magnetic nanoparticles by using simulated moving bed chromatography

Carsten-Rene Arlt, Dominik Brekel, Stefan Neumann, David Rafaja, Matthias Franzreb

Journal Article

Optimal dynamic emergency reserve activation using spinning, hydro and demand-side reserves

Surender REDDY,P. R. BIJWE,A. R. ABHYANKAR

Journal Article

Control strategies for disinfection byproducts by ion exchange resin, nanofiltration and their sequential

Journal Article

mechanisms of diphenylarsinic acid on natural magnetite and siderite: Evidence from sorption kinetics, sequential

Journal Article

A “Sequential Design of Simulations” approach for exploiting and calibrating discrete element simulations

Journal Article

Variation in humic and fulvic acids during thermal sludge treatment assessed by size fractionation, elementary

Yuning YANG,Huan LI,Jinyi LI

Journal Article

Impact of selection of DC base values and DC link control strategies on sequential AC-DC power-flow convergence

Shagufta KHAN,Suman BHOWMICK

Journal Article

Comparison of sequential with intimate coupling of photolysis and biodegradation for benzotriazole

Shunan Shan, Yuting Zhang, Yining Zhang, Lanjun Hui, Wen Shi, Yongming Zhang, Bruce E. Rittmann

Journal Article

Thermodynamic analysis of ethanol synthesis from hydration of ethylene coupled with a sequential reaction

Jie Gao, Zhikai Li, Mei Dong, Weibin Fan, Jianguo Wang

Journal Article

Successful management of seven cases of critical COVID-19 with early noninvasive–invasive sequential

Mian Peng, Xueyan Liu, Jinxiu Li, Di Ren, Yongfeng Liu, Xi Meng, Yansi Lyu, Ronglin Chen, Baojun Yu, Weixiong Zhong

Journal Article

Selectively structural fractionation and economical-functionality conversion of lignocellulosic biomass

Chen Hongzhang,Qiu Weihua and Wang Lan

Journal Article

construction integration technology in Brazil’s superlarge deep-water offshore oil and gas unit project (FPSO P67/P70)

Journal Article

P2P energy trading via public power networks: Practical challenges, emerging solutions, and the way forward

Journal Article

Deep Sequential Feature Learning in Clinical Image Classification of Infectious Keratitis

Yesheng Xu, Ming Kong, Wenjia Xie, Runping Duan, Zhengqing Fang, Yuxiao Lin, Qiang Zhu, Siliang Tang, Fei Wu, Yu-Feng Yao

Journal Article