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Performance evaluation for sustainability of wind energy project using improved multi-criteria decision-making method

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Journal of Modern Power Systems and Clean Energy 2019年第5期7卷 1165-1176页

作者： Jiahui WU Haiyun WANG Weiqing WANG qiang zhang College of Electrical Engineering Xinjiang UniversityUrumqi 830047China State Grid Xinjiang Electric Power Research Institute Urumqi 830011China

Wind power can be an efficient way to alleviate energy shortage and environmental pollution,and to realize sustainable development in terms of energy *** sustainability assessment of a wind project among its alternatives is a complex task that cannot be solely simplified to environmental or economic *** requires the consideration of its technological and social aspects as well as other *** paper proposes a new method for selecting the most sustainable wind *** method is based on multi-criteria decision-making *** analytic hierarchy process and entropy weight method are combined to determine the weights of evaluation indexes,and an innovative index-weight optimization method based on the Lagrange conditional extremum *** fuzzy technique for order preference by similarity to the ideal solution is applied to rank wind project alternatives considering functionality and proportionality of the ***,the sensitive analysis is applied to verify the robustness of the proposed *** applicability of the method is demonstrated on a case study from China,where three main wind projects are analytically compared and *** results indicated that the sustainable level of calculated wind power can provide a reference point for the planning and operation of the wind *** results show that the proposed method is of both theoretical significance and practical application in engineering.

关键词： Analytic hierarchy process Comprehensive evaluation index Entropy method Fuzzy technique Order preference Wind power sustainability level

Recent progress in carbon/lithium metal composite anode for safe lithium metal batteries

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Rare Metals 2018年第6期37卷 449-458页

作者： Tao Li He Liu Peng Shi qiang zhang Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University

Owing to their very high theoretical capacity, lithium （Li） metal anodes regain widespread attentions for their promising applications for next-generation high-energy-density Li batteries （e.g., lithium-sulfur batteries, lithium-oxygen batteries, solid-state lithium metal batter- ies）. However, the inherent bottleneck of Li metal anodes, especially the growth of Li dendrites and the related safety concerns, should be well addressed. Owing to their featured micro-/nano-porous structures and intriguing physical properties, nanocarbon materials have been applied as host materials for Li metal anodes. This review summarizes the recent progress in the development of porous nanocarbon materials for safe Li metal anodes. The perspectives regarding the challenges and future development of employing micro-/nano-porous carbon materials in Li metal anodes are also included.

关键词： Li metal anode Carbon nanomaterials Composite electrode Solid electrolyte interphase Rechargeable batteries Lithiophilic hosts Graphene

Transport property of inhomogeneous strained graphene

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Chinese Physics B 2021年第3期30卷 88-95页

作者： Bing-Lan Wu qiang Wei Zhi-qiang zhang Hua Jiang School of Physics and Technology Soochow UniversitySuzhou 215006China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006China Institute for Advanced Study Soochow UniversitySuzhou 215006China

In analogy to real magnetic field, the pseudo-magnetic field (PMF) induced by inhomogeneous strain can also formthe Landau levels and edge states. In this paper, the transport properties of graphene under inhomogeneous strain arestudied. We find that the Landau levels have non-zero group velocity, and construct one-dimensional conducting *** addition, the edge states and the Landau level states in PMF are both fragile under disorder. We also confirm that thebackscattering of these states could be suppressed by applying a real magnetic filed (MF). Therefore, the transmissioncoefficient for each conducting channel can be manipulated by adjusting the MF strength, which indicates the applicationof switching devices.

关键词： disorder effect pseudo-magnetic field strain transport properties

A New Estimation for Informed Trading Based on SSNF Method

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Journal of Systems Science & Complexity 2018年第4期31卷 988-1002页

作者： BING Tao ZHAO Shangmei zhang qiang LIU Shancun School of Economics and Management Beihang University Beijing 100191 China School of Economics and Management Beijing University of Chemical Technology Beijing 100029 China

This paper estimates the information-based trading using spatially selective noise filtration （SSNF） method. The SSNF method is a kind of filtration technique based on the different spatial correlation of the wavelet transform at several adjacent scales. Using SSNF method, the information shock caused by the informed traders could be extracted from the prices effectively, then the PINs at different scales could be calculated. The measure of informed trading can capture some asymmetric information properties, which is consistent with some empirical consensuses. Furthermore, compared with the MLE method in EKOP model, the method has computational facilities in avoiding the overflow or underflow problem, the boundary solutions problem and the initial values problem. And the method could be applied to the high-frequency world in both order-driven and quote-driven market.

关键词： Informed traders PIN SSNF wavelet analysis

Advanced electrosynthesis of hydrogen peroxide on oxidized carbon electrocatalyst

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Journal of Energy Chemistry 2019年第7期28卷 10-11页

作者： Chang-Xin Zhao Bo-Quan Li qiang zhang Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University

Hydrogen peroxide(H2O2)is one of the 100 most important chemicals involved in multiple chemical processes including paper and textile manufacturing,waste degradation,and pharmaceutical production[1].Compared with the current industrial process to produce H2O2 following the anthraquinone oxidation/reduction method,electrochemical reduction of oxygen to H2O2 through a two-electron pathway constitutes an environmental friendly alternative route[2-4].Unfortunately,the electrogeneration of H2O2 from two-electron reduction of oxygen feedstock is kinetically sluggish and therefore requires electrocatalysts with high reactivity,high selectivity,and good stability[5,6].

关键词： Hydrogen peroxide electrosynthesis Oxygen reduction reaction Carbon nanotubes Electrocatalysis Oxygen functional groups

Holographic Schwinger effect in a soft wall AdS/QCD model

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Chinese Physics C 2021年第1期45卷 127-132页

作者： Yue Ding Zi-qiang zhang School of Mathematics and Physics China University of GeosciencesWuhan 430074China

We perform a potential analysis for the holographic Schwinger effect in a deformed AdS5 model with conformal invariance broken by a background *** evaluated the static potential by analyzing the classical action of a string attached to a rectangular Wilson loop on a probe D3 brane located at an intermediate position in the bulk AdS *** observed that the inclusion of the chemical potential tends to enhance the production rate,which is opposite to the effect of the confining *** addition,we calculated the critical electric field based on the Dirac-Born-Infeld(DBI)action.

关键词： AdS/CFT correspondence gauge-gravity duality holographic Schwinger effect

Unconventional high temperature superconductivity in cubic zinc-blende transition metal compounds

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Science China(Physics,Mechanics & Astronomy) 2020年第7期63卷 104-108页

作者： qiang zhang Kun Jiang YuHao Gu JiangPing Hu Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Department of Physics Boston CollegeChestnut HillMA 02467USA Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsInstitute of Theoretical and Computational ChemistryCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Kavli Institute of Theoretical Sciences University of Chinese Academy of SciencesBeijing 100190China

We consider possible high temperature superconductivity(high-Tc)in transition metal compounds with a cubic zinc-blende lattice *** the electron filling configuration in the d-shell is close to d7,all three t2g orbitals are near half filling with strong nearest neighbor antiferromagnetic(AFM)superexchange *** argue that upon doping,this electronic environment can be one of"genes"to host unconventional high Tcwith a time reversal symmetry broken d2x2-x2-y2±idx2-y2pairing *** gapless nodal points along the diagonal directions,this state is a direct three-dimensional analogue to the two-dimensional B1gd-wave state in *** suggest that such a case may be realized in electron doped CoN,such as CoN1-xOx and(H,Li)1-xCoN.

关键词： high temperature superconductivity zinc-blende structure three-dimensional d+id wave

Entropic destruction of heavy quarkonium with hyperscaling violation

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Chinese Physics C 2021年第10期45卷 47-52页

作者： Ang Li Zi-qiang zhang School of Mathematics and Physics China University of GeosciencesWuhan 430074China Key Laboratory of Quark and Lepton Physics(MOE) Central China Normal UniversityWuhan 430079China

We study the entropic destruction of heavy quarkonium in strongly coupled theories with an anisotropic scaling symmetry in time and a spatial *** consider Lifshitz and hyperscaling violation theories,which are covariant under a generalized Lifshitz scaling symmetry with the dynamical exponent z and hyperscaling violation exponentθ.It is shown that the entropic force depends on the parameters of these *** particular,increasing z decreases the entropic force,thus reducing the quarkonium dissociation,while increasingθhas the opposite effect.

关键词： QGP quarkonium dissociation AdS/CFT correspondence entropic force

Investigation on the urea deposit formation and thermal decomposition characteristics in the SCR aftertreatment system of a diesel engine

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Journal of Environmental Sciences 2021年第5期33卷 157-171页

作者： Menghan Li Yao zhang Jiancheng Yang Xiaori Liu Zhenguo Li qiang zhang Tianjin Key Laboratory of Clean Energy and Pollution Control School of Energy and Environmental EngineeringHebei University of TechnologyTianjin 300401China School of Civil and Transportation Engineering Hebei University of TechnologyTianjin 300401China National Engineering Laboratory for Mobile Source Emission Control Technology China Automotive Technology&Research Center Co.Ltd.Tianjin 300300China State Key Laboratory of Engines Tianjin UniversityTianjin 300072China School of Energy and Power Engineering Shandong UniversityJinanShandong 250061China

Selective catalytic reduction is the most efficient and reliable equipment for NOx control in current diesel engines. However, the issue of urea crystallization becomes increasingly serious with the implement of the new emissions standards. In this paper, urea deposit samples collected from engine test bed and tube furnace were characterized by thermogravimetric analysis and Fourier transform-infrared analysis to aid the comprehension of urea deposit formation. Moreover, thermogravimetric tests were conducted to disclose the effects of catalyst on the thermal decomposition processes of urea deposit. The results indicated that less temperature resistant species are formed in the engine test bed than in the tube furnace at conditions with the same temperatures. The main compositions in the World Harmonized Transient Cycle(WHTC) urea deposits are urea, cyanuric acid(CYA) and ammelide, implying that accelerating the decomposition of these species could prevent the accumulation of urea deposit. CuWTi, Cu β and CuZSM catalysts could lead to increased yield of CYA during pure urea thermolysis. Cu β, CuWTi and VWTi catalysts tend to promote the thermolysis of CYA while VWTi has the most significant catalytic effects on the thermal decomposition of ammelide and ammeline.

关键词： Urea deposit Decomposition characteristics Selective catalytic reduction Catalyst Thermolysis