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Chinese Journal of Chemical Engineering 2020年第9期28卷 2483-2496页

作者： biao hu Jintao Ouyang Lanying Jiang School of Metallurgy and Environment Central South UniversityChangsha 410083China National Engineering Research Center for Control&TreatmentcfHeayy Metal Pollution Changsha 410083China Key Laboratory of hunan Province for Water Environment and Agriculture Product Safety Changsha 410083China

Effort has been made to investigate the concentration of titanium white waste acid(TWWA) by direct contact membrane distillation(DCMD) and the focus is the influence of polyacrylamide(PAM) on membrane wetting and *** was found that the presence of PAM in feed reduced membrane flux and retarded wetting development,even though its level in feed of H2 SO4 solution was only 0.0002 wt%.The difference between the tests using pure water and neat PAM aqueous solution,respectively,as feed also indicated the above effect registered with *** results showed that the addition of PAM in feed solution changed the membrane shell surface ***,conclusive proof of the PAM existence in membrane cross-section and inner surface was not obtained,probably due to its low concentration in feed *** approaches were tried to recover membrane *** comparison with operation w/o any treatment,HCl solution rinsing did not lead to obvious improvement in membrane flux recovery,while rinsing combined with gas purge has clearly delayed the degradation in acid concentration ***,even the latter could not ensure long term *** tortuosity and low hydrophobicity of the membranes used were suggested as underlying causes and should be addressed in the future.

关键词： Acid concentration DCMD PAM Wetting Fouling

Wave Propagation in Graphene Platelet-Reinforced Piezoelectric Sandwich Composite Nanoplates with Nonlocal Strain Gradient Effects

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Acta Mechanica Solida Sinica 2021年第4期34卷 494-505页

作者： biao hu Juan Liu Bo Zhang huoming Shen Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province School of Mechanics and EngineeringSouthwest Jiaotong UniversityChengdu610031China School of Mechanics and Engineering Southwest Jiaotong UniversityChengdu610031China

This research develops an analytical approach to explore the wave propagation problem of piezoelectric sandwich *** core of the sandwich nanoplates is a nanocomposite layer reinforced with graphene platelets,which is integrated by two piezoelectric layers exposed to electric *** material properties of nanocomposite layer are obtained by the Halpin–Tsai model and the rule of *** Euler–Lagrange equations of nanoplates are derived from Hamilton’s *** using the nonlocal strain gradient theory,the nonlocal governing equations are ***,numerical studies are conducted to demonstrate the influences of propagation angle,small-scale and external loads on wave *** results reveal that the frequency changes periodically with the propagation angle and can be reduced by increasing voltage,temperature and the thickness of graphene platelets.

关键词： Wave propagation Nonlocal strain gradient theory Piezoelectric sandwich nanoplates Graphene platelets

A rate-based method for dynamic analysis and optimal design of reactive extraction: n-Hexyl acetate esterification as an example

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Chinese Journal of Chemical Engineering 2020年第1期28卷 76-83页

作者： Xutao hu Hao Qin biao hu Hongye Cheng Lifang Chen Zhiwen Qi Max Planck Partner Group at the State Key Laboratory of Chemical Engineering School of Chemical Engineering East China University of Science and Technology

The dynamic analysis and optimal design of reactive extraction are challenging due to high nonlinearity of model equations and tough decision of judging criteria. In this work, a dynamic rate-based method is developed on g PROMS platform to get easy access to the solutions of reactive extraction with phase splitting. Based on rigorous criteria, dynamic analysis from initial state to final equilibrium(e.g., evolution of phase composition, mass transfer rate and reaction rate) and optimal design of operating conditions(e.g., extractant dosage and feed molar ratio) are achieved. To illustrate the method, the esterification of n-hexyl acetate is taken as an example. The approach proves to be reliable in the analysis and optimization of the exemplified system, which provides instructive reference for further process design and simulation of reactive extraction.

关键词： Reactive extraction Dynamic rate-based method Optimal design Process simulation n-Hexyl acetate esterification

Thermal and maturation history for Carboniferous source rocks in the Junggar Basin, Northwest China: implications for hydrocarbon exploration

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Petroleum Science 2020年第1期17卷 36-50页

作者： Di hu Song Rao Zhu-Ting Wang Sheng-biao hu State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China Key Laboratory of Exploration Technologies for Oil and Gas Resources Ministry of EducationYangtze UniversityWuhan 430100HubeiChina

The reconstruction of thermal history is an important component of basin evolution and hydrocarbon *** on vitrinite reflectance data,we integrate the paleo-temperature gradient and paleo-heat flow methods to reconstruct the thermal history of Junggar *** with present thermal state,the Junggar Basin experienced much a higher heat flow of ca.80–120 mW/m2 during the *** feature can be attributed to large-scale volcanic events and related thermal *** hydrocarbon maturation history of Carboniferous source rocks indicates that the temperature rapidly reached the threshold of hydrocarbon generation during the Late Carboniferous and has never achieved such a high level since *** characteristic resulted in the early maturation of hydrocarbons in Carboniferous source ***,the results reveal that hydrocarbon maturities are different among various tectonic units in Junggar *** kerogen either rapidly broke through the dry gas period so that cracking of gas occurred or remained in the oil maturation window forming oil reservoirs,which depended on the tectonic background and depositional *** this study,we present the thermal and hydrocarbon maturation history since the Carboniferous,which has important implications for further hydrocarbon exploration in Junggar Basin.

关键词： Thermal history Hydrocarbon maturation modeling Vitrinite reflectance Carboniferous Source rocks Junggar Basin

Model-based variational fusion for reducing spectral distortion

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Science China(Information Sciences) 2018年第1期61卷 267-269页

作者： Zeming ZHOU Chaoqian CHEN Yong MENG biao hu Institute of Meteorology and Oceanography PLA University of Science and Technology

High-resolution remote sensing satellites such as IKONOS,Quick Bird,and Geo Eye-1 usually provide a panchromatic(PAN)band and four multispectral(MS)*** sharpening is the synthesis of MS images of high spatial and spectral resolution with the spatial detail extracted from PAN *** this article,we present a model-based variational method for reducing the

关键词： IKONOS MS TVR IHS

Wave propagation analysis of porous functionally graded piezoelectric nanoplates with a visco-Pasternak foundation

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Applied Mathematics and Mechanics(English Edition) 2023年第1期44卷 35-52页

作者： Zhaonian LI Juan LIU biao hu Yuxing WANG huoming SHEN Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province School of Mechanics and Aerospace EngineeringSouthwest Jiaotong UniversityChengdu 610031China

This study investigates the size-dependent wave propagation behaviors under the thermoelectric loads of porous functionally graded piezoelectric(FGP) nanoplates deposited in a viscoelastic *** is assumed that(i) the material parameters of the nanoplates obey a power-law variation in thickness and(ii) the uniform porosity exists in the *** combined effects of viscoelasticity and shear deformation are considered by using the Kelvin-Voigt viscoelastic model and the refined higher-order shear deformation *** scale effects of the nanoplates are captured by employing nonlocal strain gradient theory(NSGT).The motion equations are calculated in accordance with Hamilton’s ***,the dispersion characteristics of the nanoplates are numerically determined by using a harmonic *** results indicate that the nonlocal parameters(NLPs) and length scale parameters(LSPs) have exactly the opposite effects on the wave *** addition,it is found that the effect of porosity volume fractions(PVFs) on the wave frequency depends on the gradient indices and damping *** these two values are small,the wave frequency increases with the volume *** contrast,at larger gradient index and damping coefficient values,the wave frequency decreases as the volume fraction increases.

关键词： scale effect functionally graded material(FGM) dispersion characteristic piezoelectric nanoplate viscoelastic foundation

Wave propagation responses of porous bi-directional functionally graded magneto-electro-elastic nanoshells via nonlocal strain gradient theory

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Applied Mathematics and Mechanics(English Edition) 2023年第10期44卷 1821-1840页

作者： Xinte WANG Juan LIU biao hu Bo ZHANG huoming SHEN School of Mechanics and Aerospace Engineering Southwest Jiaotong UniversityChengdu 610031China School of Civil Engineering Guizhou University of Engineering ScienceBijie 551700Guizhou ProvinceChina

This study examines the wave propagation characteristics for a bi-directional functional grading of barium titanate(BaTiO_(3)) and cobalt ferrite(CoFe_(2)O_(4)) porous nanoshells,the porosity distribution of which is simulated by the honeycomb-shaped symmetrical and asymmetrical distribution *** nonlocal strain gradient theory(NSGT) and first-order shear deformation theory are used to determine the size effect and shear deformation,*** governing equations are derived for the nanoshells by Hamilton's *** resulting dimensionless differential equations are solved by means of an analytical solution of the combined exponential function after dimensionless ***,extensive parametric surveys are conducted to investigate the influence of diverse parameters,such as dimensionless scale parameters,radiusto-thickness ratios,bi-directional functionally graded(FG) indices,porosity coefficients,and dimensionless electromagnetic potentials on the wave propagation *** on the analysis results,the effect of the dimensionless scale parameters on the dispersion relationship is found to be related to the ratio of the scale *** wave propagation characteristics of nanoshells in the presence of a magnetoelectric field depend on the bi-directional FG indices.

关键词： bi-directional functionally graded(FG) wave propagation dimensionless magneto-electro-elastic(MEE)nanoshell nonlocal strain gradient theory(NSGT) porosity

Wave propagation in graphene reinforced piezoelectric sandwich nanoplates via high-order nonlocal strain gradient theory

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Acta Mechanica Sinica 2021年第9期37卷 1446-1456,I0003页

作者： biao hu Juan Liu Yuxing Wang Bo Zhang huoming Shen Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province School of Mechanics and EngineeringSouthwest Jiao Tong UniversityChengdu610031China

Αn analytical method is developed to explore the wave propagation characteristics of piezoelectric sandwich nanoplates in the present *** sandwich nanoplates are composed of a graphene reinforced composite core layer with two piezoelectric surface layers exposed to electric *** material properties of the nanocomposite layer are given by the Halpin–Tsai model and mixture’s *** Euler–Lagrange equation of the nanoplates is obtained by Hamilton's principle and first-order shear deformation ***,combining the high-order nonlocal strain gradient theory with the hygrothermal constitutive relationship of composite nanoplates,the nonlocal governing equations are ***,numerical studies are conducted to demonstrate the influences of scale parameters,applied external voltage,temperature variation,moisture variation,graphene size,and weight fraction on wave *** results reveal that low-order and high-order nonlocal parameters and length scale parameters have different effects on wave *** wave frequency can be reduced by increasing temperature and the thickness of *** could facilitate the investigation of the dynamic properties of graphene nanocomposite structures.

关键词： Wave propagation High-order nonlocal strain gradient theory Piezoelectric sandwich nanoplates Graphene platelets Hygrothermal environment

Metal-ion Interactions with Sugars:Crystal Structure of Bis(4-dehydro-L-arabinose) Calcium Methanol Bishydrate

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Chinese Journal of Structural Chemistry 2015年第5期34卷 764-770页

作者： hu biao YU Di huANG Kai YU Shu-Juan College of Light Industry and Food Science South China University of Technology

The crystal structure of the metal-organic frame Ca（C5H9O5）2·CH3OH·2H2O（1） has been synthesized and *** 1 belongs to a tetragonal P43212 space *** complex 1,the sugar moiety shows a beta-L configuration of pyranose *** calcium（Ⅱ） is eight-coordinated,binding to four such sugar moieties,via O（1）,O（2） of two molecules and O（3）,O（4） of the other two,with the 4-hydroxy group being *** water and methanol molecules are not coordinated to the calcium ion.

关键词： metal-organic framework Ca-L-arabinose complex crystal structure

Study on wave dispersion characteristics of piezoelectric sandwich nanoplates considering surface effects

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Applied Mathematics and Mechanics(English Edition) 2022年第9期43卷 1339-1354页

作者： biao hu Juan LIU Yuxing WANG Bo ZHANG Jing WANG huoming SHEN Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province School of Mechanics and Aerospace EngineeringSouthwest Jiaotong UniversityChengdu 610031China School of Mechanical and Electrical Engineering Southwest Petroleum UniversityChengdu 610500China

In this study,the wave propagation properties of piezoelectric sandwich nanoplates deposited on an orthotropic viscoelastic foundation are analyzed by considering the surface effects(SEs).The nanoplates are composed of a composite layer reinforced by graphene and two piezoelectric surface *** the modified Halpin-Tsai model,the material parameters of composite layers are *** displacement field is determined by the sinusoidal shear deformation theory(SSDT).The Euler-Lagrange equation is derived by employing Hamilton’s principle and the constitutive equations of piezoelectric layers considering the ***,the nonlocal strain gradient theory(NSGT)is used to obtain the equations of ***,the effects of scale parameters,graphene distribution,orthotropic viscoelastic foundation,and SEs on the propagation behavior are numerically *** results reveal that the wave frequency is a periodic function of the orthotropic ***,the wave frequency increases with the increase in the SEs.

关键词： surface effect(SE) scale parameters orthotropic foundation functional gradient graphene piezoelectric sandwich nanoplate