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Integrable nonlocal PT-symmetric generalized so(3,R)-mKdV equations

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Communications in Theoretical Physics 2023年第12期75卷 19-24页

作者： Shou-ting Chen wen-Xiu Ma School of Mathematics and Statistics Xuzhou University of TechnologyXuzhou 221008JiangsuChina Department of Mathematics Zhejiang Normal UniversityJinhua 321004ZhejiangChina Department of Mathematics King Abdulaziz UniversityJeddah 21589Saudi Arabia Department of Mathematics and Statistics University of South FloridaTampaFL 33620-5700United States of America School of Mathematical and Statistical Sciences North-West UniversityMafikeng CampusPrivate Bag X2046Mmabatho 2735South Africa

Based on a soliton hierarchy associated with so(3,R),we construct two integrable nonlocal PT-symmetric generalized mKdV *** key step is to formulate two nonlocal reverse-spacetime similarity transformations for the involved spectral matrix,and therefore,integrable nonlocal complex and real reverse-spacetime generalized so(3,R)-mKdV equations of fifth-order are *** resulting reduced nonlocal integrable equations inherit infinitely many commuting symmetries and conservation laws.

关键词： integrable equation lax pair nonlocal reduction PT-symmetry zero curvature equation

Local intraseasonal air-sea relationship over the North Indian Ocean and western North Pacific during the spring-to-summer transition

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Atmospheric and Oceanic Science Letters 2017年第1期10卷 65-72页

作者： HU wen-ting LI ting State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics（LASG） Institute of Atmospheric PhysicsChinese Academy of Science

This study investigates the local air-sea relationship associated with the two dominant intraseasonal oscillation（ISO） components during the spring-to-summer transition and compares their properties using multiple air-sea variables in the period *** amplitude of percentage variance in SST in periods of 10-20 and 30-60 days are comparable,but the locations of the maxima differ.A strong percentage variance in the 10-20-day SST is evident in the equatorial western Pacific,whereas for the 30-60-day SST the strongest ratio occurs in the North Indian Ocean（NIO）,South China Sea（SCS）,and North *** the NIO,SCS,and Philippine Sea,there are significant correlations between SST and precipitation for both 10-20-day and 30-60-day *** contrast,the correlations between SST and surface heat fluxes cover a broader region and have larger ***,the atmospheric variables and surface heat fluxes show larger variations within the higher frequency ***,the amplitude of the correlation coefficients between SST and surface heat fluxes,and SST and rainfall,is greater in the lower frequency *** corresponding time lags for the different variables reveal that a strong local air-sea interaction is indicated over the NIO,SCS,and western North Pacific,from April to June in both timescales;however,the strength of the air-sea relationship depends on the region and variable.

关键词： Air-sea relationship intraseasonal oscillation spring-to-summer transition North Indian Ocean western North Pacific

Cross-layer optimized Chord protocol for separated ring convergence in MANET

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The Journal of China Universities of Posts and Telecommunications 2009年第4期16卷 84-90页

作者： mei Jing-qing JI Hong LI ting Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

An optimized Chord protocol is proposed to solve the convergence problem for separated Chord rings over mobile Ad-hoc networks （MANETs）. This protocol exploits the information of topological neighbors in routing layer by utilizing a cross-layer design, and periodically detects whether there is any neighbor node that belongs to an alien Chord ring by sending detecting packets. The detection will be confirmed and then the corresponding predecessor node will be found out to initialize convergence of the Chord rings. Theoretical analysis and experiment results show that the proposed algorithm can detect separated Chord rings and implement the convergence process efficiently, and that a significant improvement in the successful lookup ratio is also achieved at an acceptable overhead for the system maintenance. Moreover, the proposed protocol can ensure the stability and scalability of the system.

关键词： convergence Chord mobile Ad-hoc network (MANET) cross-layer

One-step preparation of modified photothermal-driven melamine foam with gradient wettability for oil-waterseparation

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Frontiers of Materials Science 2024年第3期18卷 71-82页

作者： Mengdan Jia mei-Chen Lin Hai-Tao Ren Bing-Chiuan Shiu Ching-wen Lou Zhi-Ke Wang Li-Yan Liu ting-ting Li Innovation Platform of Intelligent and Energy-Saving Textiles School of Textile Science and EngineeringTiangongUniversityTianjin 300387China Tianjin and Ministry of Education Key Laboratory for Advanced Textile Composite Materials Tiangong UniversityTianjin 300387China Department of Biomedical Engineering College of Biomedical EngineeringChina Medical UniversityTaichung 404333China College of Material and Chemical Engineering Minjiang UniversityFuzhou 350108China Department of Bioinformatics and Medical Engineering AsiaUniversityTaichung 413305China Department of Medical Research China Medical University HospitalChina Medical UniversityTaichung 404333China Advanced Medical Care and Protection Technology Research Center College of Textile and ClothingQingdaoUniversityQingdao 266071China Department of Textile and Clothing Shandong Vocational College of Science and TechnologyWeifang 261053China

The absorption of high-viscosity oil by traditional oil absorbing materials has always been a *** there is an urgent need to solve the problem of slow absorption of high-viscosity *** this work,an emulsion composed of polydimethylsiloxane(PDMS),carbon black(CB)and waterborne polyurethane(solid content 40%)was sprayed on the melamine foam(MF).After volatilization of organic solvents,the photothermal material CB was fixed on the MF framework,making it *** raising the temperature of the modified foam to accelerate the internal thermal movement of high-viscosity oil molecules around the foam,intermolecular forces are reduced,thereby accelerating the separation *** absorption capacity of this modified MF towards organic solvents and oil is up to 79 times its own *** addition,the mechanical properties of the modified foam are improved to a certain extent,more conducive to the continuous oil-water *** photothermal absorption material provides ideas for the rapid removal of high-viscosity oil,heavy oil,etc.

关键词： photothermal high-viscosity oil oil-water separation

Health in an Aging World： What Should We Do？

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Engineering 2016年第1期2卷 40-43页

作者： Yu-mei wen Key Laboratory of Medical Molecular Virology of Ministry of Education and Health Shanghai Medical College Fudan University Shanghai 200032 China

The global population aged 60 and older is likely to grow to historically unprecedented levels. According to the latest estima- tion, 2 billion people will be aged 60 and over by 2050-a number equivalent to 22%of the world＇s population. China＇s aging popula- tion also continues to grow rapidly; the Chinese population aged 150 and older reached 14.8% by the end of 2013. This percentage is estimated to reach 17.17% by 2020, and may be as high as 30% by 2050. The roots of population aging in China are the same as elsewhere： a low fertility rate, a longer life expectancy,

关键词：人口老龄化世界人口问题中国生育率估计年龄

Plastic deformation of magnesium alloy with different forming parameters during ultrasonic vibration-assisted single-point incremental forming

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Rare Metals 2022年第11期41卷 3878-3886页

作者： Chun Jian Su ting ting Xu Ke Zhang Ke Zhang Shu mei Lou Qing Wang College of Mechanical and Electronic Engineering Shandong University of Science and TechnologyQingdao266590China

The research of forming parameters on the ultrasonic vibration single-point incremental forming of magnesium alloy plastic deformation can provide a theoretical basis for the establishment of the forming *** to the forming characteristics of magnesium alloy sheet,a new method of ultrasonic vibration-as sis ted single-point incremental forming was *** influence of forming parameters on the plastic deformation of magnesium alloy was studied by finite element simulation and *** influence of vibration frequency,amplitude,friction coefficient,and tool head size on stress and thinning rate of magnesium alloy during ultrasonic vibration-as sis ted single-point asymptotic forming was *** results show that the vibration frequency of 20 kHz and forming tool radius of about 5 mm are beneficial for plastic deformation magnesium alloy in ultrasonic vibration-assisted single-point incremental *** vibration amplitude increasing,the maximum shear stress tends to decrease as a whole,but at the amplitude of 0.16 mm,the thinning rate is large and fracture occurs *** friction coefficient increasing,the maximum shear stress tends to increase,and there is a good linear relationship between the maximum thinning rate and the friction coefficient.

关键词： Magnesium alloy Ultrasonic vibration Incremental forming Forming parameters Plastic deformation

A two-stage amplifier of laser eavesdropping model based on waveguide fiber taper

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Defence Technology（防务技术） 2019年第1期15卷 95-97页

作者： mei-ting Wang Yan Zhu Yi-ning Mu School of Science Changchun University of Science and Technology

In order to improve ability of amplification about optical arrival angle in laser eavesdropping system, and enhance receiving field of view (FOV) of laser eavesdropping system, this paper presents a new multistage amplifier laser eavesdropping model based on waveguide fiber taper. First of all, taking about four-quadrant (4QD) laser eavesdropping model as an example, from the theoretical view, analyses factors that, currently, laser eavesdropping system face many restrictive factors during practical applications. Besides, from the receiving FOV and ability of amplification about arrival angle of incoming optical axis angles, systematically analyses advantages of multi-stage amplifier model. What’s more,through constructing laser eavesdropping test platform, we demonstrate Signal to Noise Ratio(SNR) of two stage amplification model is eventually promoted to 6-10 dB compared with one amplifying model,especially in low and high audio level, the advantages is more obvious.

关键词： Laser eavesdropping Waveguide fiber taper 4QD

Drivers of microbial beta-diversity in wastewater treatment plants in China

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Journal of Environmental Sciences 2022年第5期34卷 341-349页

作者： Bing Zhang ting Yang Chenxiang Sun Xianghua wen College of Life and Environmental Sciences Minzu University of ChinaBeijing 100081China Environmental Simulation and Pollution Control State Key Joint Laboratory School of EnvironmentTsinghua UniversityBeijing 100084China

As one of the most well-documented biogeographic patterns,the distance-decay relation-ship provides insights into the underlying mechanisms driving biodiversity ***-though wastewater treatment plants(WWTPs)are well-controlled engineered ecosystems,this pattern has been seen among microbial communities in activated sludge(AS).However,little is known about the relative importance of environmental heterogeneity and dispersal limitation in shaping AS microbial community across China;especially they are related to spatial scale and organism ***,we assessed the distance-decay relationship based on different spatial scales and microbial phylogenetic groups by analyzing 132 activated sludge(AS)samples across China comprising 3,379,20016S rRNA *** results in-dicated that the drivers of distance-decay pattern in China were *** biogeographic patterns in WWTPs were mainly driven by dispersal limitation at both local and national *** contrast,conductivity,SRT,and pH played dominant roles in shaping AS microbial community compositions at the regional *** rates and the drivers of beta-diversity also varied with microorganism ***,a quantitative re-lationship between dispersal limitation ratio and AS microbial turnover rate was ***,these results highlighted the importance of considering multiple spatial scales and micro-organism types for understanding microbial biogeography in WWTPs and pro-vided new insights into predicting variations in AS community structure in response to environmental disturbance.

关键词： Wastewater treatment plant Distance-decay pattern Scale-dependent Microbial assembly Dispersal limitation

COVID-19 data visualization public welfare activity

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Visual Informatics 2020年第3期4卷 51-54页

作者： Yiting Wang ting Wang Ying Cui Honghui mei Xiao wen Jinzhi Lu Wei Chen Alicloud China State Key Laboratory of CAD&CG Zhejiang UniversityChina

The coronavirus disease 2019(COVID-19)pandemic started in early *** the beginning of February,a public welfare activity in epidemic data visualization,jointly launched by China Computer Federation(CCF)(CCF)CAD&CG Technical Committee,Alibaba Cloud Tianchi(Alibaba Cloud Tianch),JiqiZhixin(JiqiZhixin),Alibaba Cloud DataV(Alibaba Cloud DataV),and DataWhale(DataWhale),was launched with the theme‘‘Fighting the Epidemic with One Mind and Talents like Tianchi.’’Developers in general are expected to focus on several demand scenarios,such as epidemic situation display,epidemic popular science,trend prediction,material-supply situation,and rework and return situation of employees from all sectors and areas,to discover the relationship between complex heterogeneous multi-source data,develop various upbeat works and present useful information to the public in a coherent *** entry works take the form of data visualization and are divided into two categories:popular science publicity and application *** popular science publicity category includes works for the public,focused on epidemic situation display,epidemic popular science publicity,epidemic prevention and control,and *** application scenario category consists of the works of frontline officers,which can provide anti-epidemic workers with effective data tools for efficient and intuitive epidemic analysis;offer reliable,understandable,and easily transmitted information for disease prevention;and assist governments,enterprises,and institutions in the fight against COVID-19.

关键词： return Developer prevention