Search results for: Yi Zhang

Items from 1 to 20 out of 4,699 results

article

Modeling carbon emissions from urban traffic system using mobile monitoring

Daniel (Jian) Sun, Ying Zhang, Rui Xue, Yi Zhang

Science of the Total Environment > 2017 > 599-600 > Complete > 944-951

Comprehensive analyses of urban traffic carbon emissions are critical in achieving low-carbon transportation. This paper started from the architecture design of a carbon emission mobile monitoring system using multiple sets of equipment and collected the corresponding data about traffic flow, meteorological conditions, vehicular carbon emissions and driving characteristics on typical roads in Shanghai...

article

Noether theorem for non-conservative systems with time delay on time scales

Xiang-Hua Zhai, Yi Zhang

Communications in Nonlinear Science and Numerical Simulation > 2017 > 52 > Complete > 32-43

This paper deals with the Noether theorem for non-conservative systems with time delay on time scales. First, the Hamilton principle for the non-conservative system with time delay on time scales is proposed, and Lagrange equations with time delay on time scales are obtained. Second, based on the invariance of the Hamilton action for the non-conservative system with time delay under a group of infinitesimal...

article

A cold active transglutaminase from Antarctic krill (Euphausia superba): Purification, characterization and application in the modification of cold-set gelatin gel

Yi Zhang, Shudong He, Benjamin K. Simpson

Food Chemistry > 2017 > 232 > Complete > 155-162

Transglutaminase (TGase), EC 2.3.2.13, was purified from whole Antarctic krill (Euphausia superba) using ammonium sulfate fractionation and DEAE-Sephacel chromatography. The purified enzyme had specific activity, purification fold and yield of 53.518U/mg, 10.272 and 10.992%, respectively. The molecular weight of the purified Antarctic krill TGase was estimated to be 78kDa using sodium dodecyl sulphate-polyacrylamide...

article

Electrochemical detoxification and recovery of spent SCR catalyst by in-situ generated reactive oxygen species in alkaline media

Yudong Xue, Yang Zhang, Ying Zhang, Shili Zheng, more

Chemical Engineering Journal > 2017 > 325 > Complete > 544-553

OH are in-situ generated from two-electron ORR and electro-Fenton-like reaction, respectively. The mechanism of electrochemical arsenic extraction is systematically illustrated by employing the ESR measurements, and vanadium species induced electro-Fenton-like reaction is proposed. After electro-oxidative dissolution, the crystal structure and original composition of the catalyst support (TiO₂ and...

article

Effect of sulfite on divalent mercury reduction and re-emission in a simulated desulfurization aqueous solution

Lin Chang, Yongchun Zhao, Hailong Li, Chong Tian, more

Fuel Processing Technology > 2017 > 165 > Complete > 138-144

Wet flue gas desulfurization (WFGD) systems have several benefits, including SO₂ removal and Hg pollution control. However, the absorbed ionic mercury may be transformed into insoluble elemental mercury because of the chemical interaction with the aqueous scrubbing solution, which causes mercury re-emission and reduces the mercury capture efficiency of the scrubber. This study investigates the effects...

article

Rapid separation and large-scale synthesis of β-FeOOH nanospindles for direct coal liquefaction

Jianping Sheng, Murzabek Ispolovich Baikenov, Xiaoyu Liang, Xuehui Rao, more

Fuel Processing Technology > 2017 > 165 > Complete > 80-86

A rapid separation method for the large-scale synthesis (422g) of β-FeOOH nanospindles has been achieved via a facile hydrolysis route, including a simple surface-modified process with sodium oleate to improve the dispersivity of β-FeOOH in the direct coal liquefaction (DCL) reaction. The as-prepared (also oleic acid-coated) β-FeOOH exhibited superior catalytic activity toward DCL reaction. The percent...

article

Facile preparation of nanocrystalline Fe2B coating by direct electro-spark deposition of coarse-grained Fe2B electrode material

Xiang Wei, Zhiguo Chen, Jue Zhong, Li Wang, more

Journal of Alloys and Compounds > 2017 > 717 > Complete > 31-40

Nanocrystallization is a promising way to increase the toughness of brittle materials. In this work, to obtain toughened Fe₂B coating and overcome various limitations of boriding, electro-spark deposition (ESD) has been used to prepare nanocrystalline Fe₂B coating. A coarse-grained Fe₂B electrode was used as anode. The microstructure, microhardness, nanomechanical properties and fracture toughness...

article

Effects of gravel on concentrated flow hydraulics and erosion in simulated landslide deposits

Tianyang Li, Binghui He, Zhanpeng Chen, Yi Zhang, more

Catena > 2017 > 156 > Complete > 197-204

Gravel has an important influence on concentrated flow hydraulics and soil and water loss. We conducted a field investigation and a subsequent simulated scouring experiment with four gravel contents (0, 25, 33.3, 50%) and three inflow rates (4, 8, 12L/min) under two steep slopes (67.5, 72.7%). We assessed the characteristics of concentrated flow hydraulics, including flow velocity, flow depth, Reynolds...

article

Alkaline electrochemical advanced oxidation process for chromium oxidation at graphitized multi-walled carbon nanotubes

Yudong Xue, Shili Zheng, Zhi Sun, Yi Zhang, more

Chemosphere > 2017 > 183 > Complete > 156-163

Alkaline electrochemical advanced oxidation processes for chromium oxidation and Cr-contaminated waste disposal were reported in this study. The highly graphitized multi-walled carbon nanotubes g-MWCNTs modified electrode was prepared for the in-situ electrochemical generation of HO₂⁻. RRDE test results illustrated that g-MWCNTs exhibited much higher two-electron oxygen reduction activity than other...

article

Zero-sum continuous-time Markov pure jump game over a fixed duration

Xin Guo, Yi Zhang

Journal of Mathematical Analysis and Applications > 2017 > 452 > 2 > 1194-1208

This paper considers a two-person zero-sum continuous-time Markov pure jump game in Borel state and action spaces over a fixed finite horizon. The main assumption on the model is the existence of a drift function, which bounds the reward rate. Under some regularity conditions, we show that the game has a value, and both of the players have their optimal policies.

article

Honeycomb-inspired design of ultrafine SnO2@C nanospheres embedded in carbon film as anode materials for high performance lithium- and sodium-ion battery

Xiang Ao, Jianjun Jiang, Yunjun Ruan, Zhishan Li, more

Journal of Power Sources > 2017 > 359 > Complete > 340-348

Tin oxide (SnO₂) has been considered as one of the most promising anodes for advanced rechargeable batteries due to its advantages such as high energy density, earth abundance and environmental friendly. However, its large volume change during the Li-Sn/Na-Sn alloying and de-alloying processes will result in a fast capacity degradation over a long term cycling. To solve this issue, in this work we...

article

Efficient Co@CoO core-shell nanocrystals as catalysts for visible-light-driven water oxidation

Zheng Wan, Qian Xu, Hui Li, Yi Zhang, more

Applied Catalysis B: Environmental > 2017 > 210 > Complete > 67-76

This paper introduces the first attempt of using well organized Co@CoO core-shell nanocrystals as an alternative toward noble metal catalysts for photocatalytic water splitting reactions. In this work, four kinds of stable magnetic Co@CoO core-shell nanocrystals were fabricated through a one-pot toluene-water two-phase interfacial reaction with oleic acid as a surfactant. The size and shape of the...

article

Effects of z-pin’s porosity on shear properties of 2D C/SiC z-pinned joint

Yi Zhang, Litong Zhang, Jiaxin Zhang, Xiaowei Yin, more

Composite Structures > 2017 > 173 > Complete > 106-114

In this paper, 2D C/SiC z-pinned joint is prepared via chemical vapor infiltration. Effects of z-pin’s porosity on shear properties of z-pinned joint are investigated from the failure mode and the shear damage mechanisms. The results show that the average joint shear strength decreases asymptotically from 249.9MPa to 97.2MPa as the total porosity of 2D C/SiC z-pin increases from 14.4% to 27.3%. For...

article

Significantly enhanced enzymatic hydrolysis of rice straw via a high-performance two-stage deep eutectic solvents synergistic pretreatment

Xue-Dan Hou, Guo-Jian Feng, Mei Ye, Chao-Mei Huang, more

Bioresource Technology > 2017 > 238 > Complete > 139-146

A two-stage deep eutectic solvents (DESs) treatment was shown to be an effective method for improving the utilization of certain DESs, and the specific order of pretreatment, such as malic acid/proline (MP) or choline chloride/oxalic acid (CO) during the first stage and choline chloride/urea (CU) during the second stage, resulted in better performance for enhancing the sugar yield due to the synergistic...

article

Facile one-pot fabrication of Ag@MOF(Ag) nanocomposites for highly selective detection of 2,4,6-trinitrophenol in aqueous phase

Hongxu Guo, Yanhui Zhang, Zishan Zheng, Haibin Lin, more

Talanta > 2017 > 170 > Complete > 146-151

Ag@MOF(Ag) nano-composites were fabricated through one-pot facile reflux reaction from the raw materials of AgNO₃ and 2-aminoterephthalic acid, and were then characterized through SEM, TEM, XRD, XPS, and FTIR, which showed a high fluorescence quantum yield (10.6%) and exhibited outstanding selectivity and excellent sensitivity for 2,4,6-trinitrophenol (TNP) over a concentration range of 1–29μM in...

article

Analysis and coordinated control of mode transition and shifting for a full hybrid electric vehicle based on dual clutch transmissions

Zhenzhen Lei, Dongye Sun, Yonggang Liu, Datong Qin, more

Mechanism and Machine Theory > 2017 > 114 > Complete > 125-140

A Full Hybrid Electric Vehicle (FHEV) has been proposed with a single motor based on Dual Clutch Transmissions (DCT), which can take the advantage of the distinctive HEV structure and advantages of DCT. The dynamic model of hybrid system has been established taking the characteristics of engine, ISG motor and clutches into consideration. The working modes of the FHEV have been designed based on the...

article

The interface control of butt joints in laser braze welding of aluminium-steel with coaxial powder feeding

Yi Zhang, Guanlin Guo, Funan Li, Gang Wang, more

Journal of Materials Processing Tech. > 2017 > 246 > Complete > 313-320

Laser braze welding of TG-1 steel and 5251 aluminium alloy was performed by coaxial feeding AlSi12 powder. From an analysis of the microstructure and mechanical properties of the welding joints, this paper proposed a zero-mean normalization research method for the correlation between the intermetallic compound (IMC) layer thickness and tensile strength. Based on differences in the welding joint strength...

article

A numerical approach for obtaining type curves of superheated multi-component thermal fluid flow in concentric dual-tubing wells

Fengrui Sun, Yuedong Yao, Xiangfang Li, Pengliang Yu, more

International Journal of Heat and Mass Transfer > 2017 > 111 > Complete > 41-53

Huge amount of works have been done on wellbore modeling, but most of the researchers focused on saturated thermal fluid, with very little efforts on superheated multi-component thermal fluid (SMTF). In this paper, the authors presented a novel model for predicting thermophysical properties of SMTF in concentric dual-tubing wells (CDTW).Firstly, based on real gas state equation, a novel model comprised...

article

Humidity effects on scanning polarization force microscopy imaging

Yue Shen, Yuan Zhou, Yanxia Sun, Lijuan Zhang, more

Applied Surface Science > 2017 > 412 > Complete > 497-504

Scanning polarization force microscopy (SPFM) is a useful surface characterization technique to visually characterize and distinguish nanomaterial with different local dielectric properties at nanometer scale. In this paper, taking the individual one-atom-thick graphene oxide (GO) and reduced graphene oxide (rGO) sheets on mica as examples, we described the influences of environmental humidity on...

article

Comparison of traditional intranasal and aerosol inhalation inoculation of guinea pigs with visualizing influenza virus

Yi Zhang, Zhendong Guo, Zhongyi Wang, Yingying Fu, more

Journal of Aerosol Science > 2017 > 110 > Complete > 43-52

Influenza A virus has caused intermittent pandemics with potentially devastating consequences in human populations. Under natural conditions, influenza virus is mainly spread person-to-person through the air; however, in studies of influenza virology, the virus is typically intranasally instilled in the form of large liquid droplets. The dynamics of influenza virus infection and real-time progression...

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INFONA - science communication portal

Search results for: Yi Zhang

Modeling carbon emissions from urban traffic system using mobile monitoring

Noether theorem for non-conservative systems with time delay on time scales

A cold active transglutaminase from Antarctic krill (Euphausia superba): Purification, characterization and application in the modification of cold-set gelatin gel

Electrochemical detoxification and recovery of spent SCR catalyst by in-situ generated reactive oxygen species in alkaline media

Effect of sulfite on divalent mercury reduction and re-emission in a simulated desulfurization aqueous solution

Rapid separation and large-scale synthesis of β-FeOOH nanospindles for direct coal liquefaction

Facile preparation of nanocrystalline Fe2B coating by direct electro-spark deposition of coarse-grained Fe2B electrode material

Effects of gravel on concentrated flow hydraulics and erosion in simulated landslide deposits

Alkaline electrochemical advanced oxidation process for chromium oxidation at graphitized multi-walled carbon nanotubes

Zero-sum continuous-time Markov pure jump game over a fixed duration

Honeycomb-inspired design of ultrafine SnO2@C nanospheres embedded in carbon film as anode materials for high performance lithium- and sodium-ion battery

Efficient Co@CoO core-shell nanocrystals as catalysts for visible-light-driven water oxidation

Effects of z-pin’s porosity on shear properties of 2D C/SiC z-pinned joint

Significantly enhanced enzymatic hydrolysis of rice straw via a high-performance two-stage deep eutectic solvents synergistic pretreatment

Facile one-pot fabrication of Ag@MOF(Ag) nanocomposites for highly selective detection of 2,4,6-trinitrophenol in aqueous phase

Analysis and coordinated control of mode transition and shifting for a full hybrid electric vehicle based on dual clutch transmissions

The interface control of butt joints in laser braze welding of aluminium-steel with coaxial powder feeding

A numerical approach for obtaining type curves of superheated multi-component thermal fluid flow in concentric dual-tubing wells

Humidity effects on scanning polarization force microscopy imaging

Comparison of traditional intranasal and aerosol inhalation inoculation of guinea pigs with visualizing influenza virus

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