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Multi-criteria Satisfaction Assessment of the Spatial Distribution of Urban Emergency Shelters Based on High-Precision Population Estimation

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International Journal of Disaster Risk Science 2016年第4期7卷 413-429页

作者： jia Yu jiahong wen Department of Geography Shanghai Normal University

This article introduces a framework for the multi-criteria satisfaction assessment of the spatial distribution of urban emergency shelters.A GIS-based analytic hierarchy process approach was utilized to conduct the assessment based on selected criteria layers for daytime and nighttime scenarios,*** layers were generated from high-precision land use data based on highresolution aerial images and census *** the uncertainty in criteria weighting,a spatial sensitivity analysis was undertaken for deriving more accurate *** feasibility of the framework was tested on a case study in Jing'an District,Shanghai,*** assessment results show that both at nighttime and during daytime,even if all potentially available shelters are open,the demand in large areas can only be marginally satisfied or not satisfied,especially in the northern,eastern,and central parts of Jing'an *** quantitative analysis of the satisfaction conditions of the buildings or land parcels and the affected people,especially children and the elderly,shows a low satisfaction level of shelter services in these *** satisfaction assessment of emergency shelters can help government decision makers find low satisfaction areas of sheltering services and support further locationallocation optimization of urban emergency shelters.

关键词： Population estimation Shanghai Spatial distribution Urban emergency shelters

Robust and High-Wettability Pristine Poly(ether ether ketone) Nanofiber Separator for Heat-Resistant and Safe Lithium-Ion Battery

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Chinese Journal of Polymer Science 2023年第12期41卷 1937-1946,I0009页

作者： xin-Ke Dai Feng-Shan Yu jia-Wei wen Chun-Xia Wang xin-Long Ma Wang Yang Guo-Yong Huang Hai-Mu Ye College of New Energy and Materials China University of PetroleumBeijing 102249China State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China

Separator is a pivotal component of lithium-ion batteries(LIBs)and determines the electrochemical performance and ***,with the increase in energy density and application scenarios,commercial polyolefin separators are increasingly unable to undertake heavy responsibility of battery safety ***,a new kind of nanofiber separator based on poly(ether ether ketone)(PEEK)with excellent thermal stability,self-extinguishing,and superior electrochemical properties is *** inheritance of intrinsic properties from raw PEEK materials and optimized hot-pressing operation endows the separator with high robustness and wettability,showing tensile strength of 15.8 MPa and a contact angle of 17.2°.The high thermal stability of PEEK can ensure the separator to preserve the structural integrity and microstructure at temperatures beyond 300℃,and the excellent self-extinguishing peculiarity of PEEK capacitates the high safety of ***,benefitting from high porosity and polar surface,the PEEK separator shows high electrolyte uptake of 245.5%and exhibits a wider electrochemical window and faster lithium-ion transport number than commercial polyolefin ***,cells assembled with PEEK separator display better performance than the ones with PE separator,and the PEEK LIB has been successfully used to light up a lamp at a high temperature of 150℃.

关键词： Separator Lithium-ion battery Heat-resistance PEEK

Teleportation of an Arbitrary Two-Particle State via a Single Cluster-Class State

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Communications in Theoretical Physics 2009年第8期52卷 209-213页

作者： WANG xin-wen Department of Physics Hunan University of Science and Engineering Yongzhou 425100 China Department of Physics and Applied Optics Beijing Area Major Laboratory Beijing Normal University Beijing 100875China

Teleportation of an arbitrary two-qubit state with a single partially entangled state,a four-qubit linearcluster-class state,is *** case is more practical than previous ones using maximally entangled states as thequantum *** order to realize teleportation,we first construct a cluster-basis of 16 orthonormal cluster *** show that quantum teleportation can be successfully implemented with a certain probability if the receiver can adoptappropriate unitary transformations after receiving the sender's cluster-basis measurement *** addition,animportant conclusion can be obtained that a four-qubit maximally entangled state (cluster state) can be extracted froma single copy of the cluster-class state with the same probability as the teleportation in principle.

关键词： probabilistic teleportation cluster-class state cluster-basis measurement unitary transformation

Disturbance Rejection Adaptive Control for Atmospheric Effects on Aircraft

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Transactions of Nanjing University of Aeronautics and Astronautics 2017年第6期34卷 637-646页

作者： Wang xin Chen xin wen Liyan College of Automation and Engineering Nanking University of Aeronautics and AstronauticsNanjing 210016P.R.China

Disturbance rejection algorithm based on model reference adaptive control(MRAC)augmentation is investigated for uncertain turbulence disturbances.A stable adaptive control scheme is developed based on lower diagonal upper(LDU)decomposition of the high frequency gain matrix,which ensures closed-loop stability and asymptotic output *** the proposed control techniques,the bounded stability is achieved and the controller is able to remain within tight bounds on the matched and unmatched ***,simulation studies of a linearized lateral-directional dynamics model are conducted to demonstrate the performance of the adaptive scheme.

关键词： adaptive control disturbance rejection LDU decomposition tracking performance

Excitation spectra of one-dimensional spin-1/2 Fermi gas with an attraction

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Communications in Theoretical Physics 2022年第12期74卷 154-175页

作者： jia-Feng Pan jia-jia Luo Xi-wen Guan State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China Department of Fundamental and Theoretical Physics Research School of PhysicsAustralian National UniversityCanberra ACT 0200Australia University of Chinese Academy of Sciences Beijing 100049China NSFC-SPTP Peng Huanwu Center for Fundamental Theory Xi'an 710127China

Using an exact Bethe ansatz solution,we rigorously study excitation spectra of the spin-1/2 Fermi gas(called Yang–Gaudin model)with an attractive *** excitations of this model involve particle-hole excitation,hole excitation and adding particles in the Fermi seas of pairs and unpaired *** gapped magnon excitations in the spin sector show a ferromagnetic coupling to the Fermi sea of the single *** numerically and analytically solving the Bethe ansatz equations and the thermodynamic Bethe ansatz equations of this model,we obtain excitation energies for various polarizations in the phase of the Fulde–Ferrell–Larkin–Ovchinnikov-like *** a small momentum(long-wavelength limit)and in the strong interaction regime,we analytically obtained their linear dispersions with curvature corrections,effective masses as well as velocities in particle-hole excitations of pairs and unpaired *** a type of particle-hole excitations display a novel separation of collective motions of bosonic modes within paired and unpaired ***,we also discuss magnon excitations in the spin sector and the application of Bragg spectroscopy for testing such separated charge excitation modes of pairs and single fermions.

关键词： Yang-Gaudin model quantum integrability the Bethe ansatz excitation spectrum

Radiation removal of synthetic estrogens in aqueous solution:influence of reduction or oxidation system and toxicity test

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Nuclear Science and Techniques 2016年第1期27卷 63-70页

作者： Ming-Hong Wu jia-Ling Li Xiang-xin He Gang Xu Guo-Ji Ding wen-Yan Shi Institute of Applied Radiation School of Environmental and Chemical Engineering Shanghai University

Estrogens as a kind of steroidal sex hormone are widely used in humans, especially quinestrol(QS),dienestrol(DS) and norethindrone(NET, 19-nor-17-alphaethinltestoster-one), which cannot be completely degraded after application. Steroidal estrogens at low concentration pulling into environment can disturb the normal biological function of wide life and thus lead to great threat to humans. So it is important to explore its degradation mechanism and its behavior in the environment. In this study, we investigated the oxidation or reduction system under gamma irradiation for reducing estrogenic activity in the aqueous solutions as well as degradation kinetics, its by-products and yield of transformation by different analytical methods such as GC–MS and HPLC. Gamma irradiation could effectively degrade estrogens in aqueous solution. The degradation reaction of estrogens could be depicted by first-order reaction kinetics. The total organic carbon of solution decreased with an increasing absorbed dose with the order: quinestrol [ norethindrone [ dienestrol. The toxicity of the three estrogens was declined after irradiation. Mono- and quadric-hydroxylated intermediates as well as organic acids were formed after gamma irradiation.

关键词：甾体雌激素还原系统毒性试验水溶液辐射能氧化一级反应动力学 γ射线照射

An APD-Based Evaluation on the Effect of Transient Disturbance over Digital Transmission

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Chinese Journal of Electronics 2020年第1期29卷 57-65页

作者： GENG xin wen Yinghong ZHANG Jinbao Institute of Electromagnetic Compatibility Beijing Jiaotong University Beijing Engineering Research Center of EMC and GNSS Technology for Rail Transportation

In railway electromagnetic environment,transient disturbances usually degenerate the function of railway wireless communication systems, thus may cause severe security issues. To protect communication services,measurement methodology to characterize disturbances keeps evolving. Nowadays, the statistical characteristics of disturbances, such as Amplitude probability distribution(APD), have been proven more efficient to assess the degradation of digital transmission than Quasipeak detection in most Electromagnetic Compatibility standards. To demonstrate the impact of disturbances on error performance more precisely, a more refined method to estimate Bit error probability(BEP) of digital modulation is necessary. The APD value is ideally obtained with the equivalent bandwidth of the radio service under threat, which means specific apparatus of certain radio service is consequently indispensable. This paper proposes a novel method to estimate the maximum BEP of multilevel amplitude modulations based on APD acquired by standard apparatus. The calculated BEP also provides reference for APD emission restriction.

关键词： APD BEP Digital transmission Transient disturbance

Lubricating properties of ester oil prepared from bio-based 2,5-furandicarboxylic acid

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Friction 2020年第2期8卷 360-369页

作者： Mingjin FAN jia Al Shuai ZHANG Chenlu YANG xin DU Ping wen Xiangyuan YE Feng ZHOU Weiming LIU Shanxi Key Laboratory of Phytochemistry College of Chemistry&Chemical EngineeringBaoji University of Arts and SciencesBaoji 721013China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China College of Chemistry and Molecular Science Wuhan UniversityWuhan 430072China

The depletion of petroleum resources and the intensification of environmental problems have necessitated the development of renewable products from bio-based chemicals instead of petroleum ***,a new kind of ester lubricating oil,isooctyl furan dicarboxylate(isooctyl-FD),was prepared from bio-based 2,5-furandicarboxylic *** structure of isooctyl-FD was evaluated using nuclear magnetic resonance imaging and high-resolution mass *** physicochemical and tribological properties including thermal and oxidation stabilities,flash point and pour point,viscosity and viscosity index,and friction-reducing and anti-wear properties were systematically *** results show that isooctyl-FD has comparable thermal and oxidation stability to the synthetic ester lubricating oil,isooctyl sebacate(isooctyl-S).Its friction-reducing and anti-wear properties are superior to isooctyl-S;however,its viscosity-temperature and low-temperature properties are inferior to isooctyl-S.

关键词： 2,5-furandicarboxylic acid synthetic ester bio-based platform compound lubricating oil

Comparison of Riemann Solutions for Non-isentropic Modified and Pure Chaplygin Gas Dynamics

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Acta Mathematicae Applicatae Sinica 2023年第3期39卷 733-751页

作者： wen-jia WU Li WANG Department of Arts and Sciences Shanghai Dianji UniversityShanghai 201306China

In this paper,we investigate the Riemann solutions of the non-isentropic Euler equations for the modified Chaplygin gas and the pure Chaplygin gas,which are the set of all rarefaction waves,shock waves,contact discontinuity andδ-shock *** some appropriate conditions,by studing the limiting behavior,we find that the Riemann solutions of modified Chaplygin gas is the same as pure Chaplygin gas including theδ-shock waves.

关键词： modified Chaplygin gas δ-shock waves Riemann problem generalized Rankine-Hugoniot conditions