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Inverse scattering transforms of the inhomogeneous fifth-order nonlinear Schrodinger equation with zero/nonzero boundary conditions

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Communications in Theoretical Physics 2022年第8期74卷 56-68页

作者： Jin-Jin Mao Shou-fu tian tian-Zhou Xu Lin-Fei Shi School of Mathematics and Statistics Beijing Institute of TechnologyBeijing 100081China School of Mathematics China University of Mining and TechnologyXuzhou 221116China

The present work studies the inverse scattering transforms(IST)of the inhomogeneous fifth-order nonlinear Schrodinger(NLS)equation with zero boundary conditions(ZBCs)and nonzero boundary conditions(NZBCs).Firstly,the bound-state solitons of the inhomogeneous fifth-order NLS equation with ZBCs are derived by the residue theorem and the Laurent's series for the first ***,by combining with the robust IST,the Riemann-Hilbert(RH)problem of the inhomogeneous fifth-order NLS equation with NZBCs is ***,based on the resulting RH problem,some new rogue wave solutions of the inhomogeneous fifth-order NLS equation are found by the Darboux ***,some corresponding graphs are given by selecting appropriate parameters to further analyze the unreported dynamic characteristics of the corresponding solutions.

关键词： the inhomogeneous fifth-order nonlinear Schrodinger equation inverse scattering transforms Darboux transformation bound-state soliton rogue wave zero/nonzero boundary conditions

Distribution function estimates by Wasserstein metric and Bernstein approximation for C^(-1) functions

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Applied Mathematics(A Journal of Chinese Universities) 2015年第2期30卷 141-150页

作者： wu Zong-min tian Zheng Shanghai Key Laboratory for Contemporary Applied Mathematics School of Mathematical SciencesFudan University

The aim of the paper is to estimate the density functions or distribution functions measured by Wasserstein metric, a typical kind of statistical distances, which is usually required in the statistical learning. Based on the classical Bernstein approximation, a scheme is presented. To get the error estimates of the scheme, the problem turns to estimating the L1 norm of the Bernstein approximation for monotone C-1 functions, which was rarely discussed in the classical approximation theory. Finally, we get a probability estimate by the statistical distance.

关键词： Wasserstein metric Bernstein approximation L1 norm approximation confidence interval

Transesterification catalyzed by samarium tri-2-propoxide

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Chinese Journal of Chemistry 1997年第1期15卷 90-93页

作者： fu, XL wu, SH Department of Chemistry Fudan University Shanghai 200433 Chino [*]Department of Chemistry Fudan University Shanghai 200433 Chino

A facile method for transesterification was reported. Under catalysis by samarium tri-2-propoxide the yields of transesterification are good to excellent, and this reaction has surprising selectivity and mildness due ... 详细信息

关键词： transesterification samarium tri-2-propoxide catalysis

Spatial Pattern of Female Non-agricultural Employment and Its Driving Forces in Guangdong Province,China:A Perspective of Individual and Family-level

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Chinese Geographical Science 2020年第4期30卷 725-735页

作者： fu Zhanhui MEI Lin LIU Yanjun tian Junfeng ZHENG Rumin tian Jing School of Geography Science Northeast Normal UniversityChangchun 130024China School of Earth Science Jilin UniversityChangchun 130061China School of Tourism Management Zhengzhou UniversityZhengzhou 450001

Promoting women’s employment is not only the need of social and economic development,but also the historical mission of liberating *** paper uses data from the 1%Population Sample Survey,taken in Guangdong Province in 2015,to explore how women’s marital status,education,and family environment affect the female non-agricultural employment rate(FNAER)on a county scale using a spatial-lag *** results show that:1)The female non-agricultural employment rate in counties of Guangdong Province is low,with more than three-quarters of counties having female non-agricultural employment rate less than 50%.Moreover,the spatial distribution of FNAER is uneven,with the high-value areas concentrated in the southeast and the low-value areas mainly distributed in the central and western parts of Guangdong Province.2)From the perspective of industry,there are significant spatial differences among *** the southeast,women are mainly engaged in the secondary industry,while in the central and western regions,women are mainly engaged in the tertiary industry.3)Women having better skills and more effective support from the elderly can improve the *** having lower skills,smaller-scale families,a higher fertility rate,and households with two or more elderly members have a negative effect on the FNAER.4)Public policies suggest that improving women’s education and their family environment,building social welfare facilities,and repairing the family environment will increase the FNAER.

关键词： female non-agricultural employment(FNAER) spatial distribution driving factors family environment individual characteristics Guangdong Province China

Time-series analysis of the characteristic pressure fluctuations in a conical fluidized bed with negative pressure

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Chinese Journal of Chemical Engineering 2021年第4期34卷 87-99页

作者： Sheng Fang Yanding Wei Lei fu Geng tian Haibin Qu The State Key Laboratory of Fluid Power and Mechatronic Systems College of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province College of Mechanical EngineeringZhejiang UniversityHangzhou 310027China College of Mechanical Engineering Zhejiang University of TechnologyHangzhou 310023China Pharmaceutical Informatics Institute College of Pharmaceutical SciencesZhejiang UniversityHangzhou 310058China

The negative pressure conical fluidized bed is widely used in the pharmaceutical *** this study,experiments based on the negative pressure conical fluidized bed are carried out by changing the material mass and particle *** pressure fluctuation signals are analyzed by the time and the frequency domain methods.A method for absolutely characterizing the degree of the energy concentration at the main frequency is proposed,where the calculation is to divide the original power spectrum by the average signal power.A phenomenon where the gas velocity curve temporarily stops growing is observed when the material mass is light,and the particle size is *** standard deviation and kurtosis both rapidly change at the minimum fluidization velocity and thus can be used to determine the flow regime,and the variation rule of the kurtosis is independent of both the material mass and particle *** the initial fluidization stage,the dominant pressure signal comes from the material movement;with the increase in the gas velocity,the power of a 2.5 Hz signal continues to increase.A method of dividing the main frequency by the average cycle frequency can conveniently determine the fluidized state,and a novel concept called stable fluidized zone proposed in this paper can be *** the gas velocity within the stable fluidized zone ensures that the fluidized bed consistently remains in a stable fluidized state.

关键词： Conical fluidized bed Negative pressure Pressure fluctuation Time-series analysis Characteristic value Fluidized state

A Novel Parameter Estimation Algorithm for DSSS Signals Based on Compressed Sensing

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Chinese Journal of Electronics 2015年第2期24卷 434-438页

作者： wu Shuang tian Jing CUI Wei Radar Research Laboratory School of Information and ElectronicsBeijing Institute of Technology

A novel parameter estimation algorithm based on Compressed sensing(CS) for the Direct sequences spread spectrum(DSSS) signals in high dynamic environments is proposed. In this algorithm, Fractional Fourier transform(Fr FT) is first employed to estimate Doppler frequency rate, followed by the quadric phase term compensation. The compensation results are divided into several segments with equal length and coherent integration is carried out within each segment respectively. A convex optimization algorithm is applied to estimate the velocity and initial range of the target simultaneously based on the sparsity of target in the code phase domain. The proposed algorithm is capable of overcoming the limitation of Doppler frequency ambiguity and obtaining the accurate parameter estimates without correcting the code phase drift. Simulation results are presented to demonstrate the validity of the proposed algorithm.

关键词： Compressed sensing(CS) Fractional Fourier transform(Fr FT) Direct sequences spread spectrum(DSSS) Doppler frequency ambiguity

Activation of skeletal carbohydrate-response element binding protein(ChREBP)-mediated de novo lipogenesis increases intramuscular fat content in chickens

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Animal Nutrition 2024年第3期18卷 107-118页

作者： Peng Wang Haihan Xiao tian wu Qinghua fu Xudong Song Yameng Zhao Yan Li Jieping Huang Ziyi Song Guangxi Key Laboratory of Animal Breeding Disease Control and PreventionCollege of Animal Science and TechnologyGuangxi UniversityNanningGuangxi 530004China

The intracellular lipids in muscle cells of farm animals play a crucial role in determining the overall intramuscular fat(IMF)content,which has a positive impact on meat ***,the mechanisms underlying the deposition of lipids in muscle cells of farm animals are not yet fully *** purpose of this study was to determine the roles of carbohydrate-response element binding protein(ChREBP)and fructose in IMF deposition of *** virus-mediated ChREBP overexpression in tibialis anterior(TA)muscle of chickens,seven 5-d-old male yellow-feather chickens were *** 10 d after virus injection,the chickens were slaughtered to obtain TA muscles for *** fructose administration trial,sixty 9-wk-old male yellow-feather chickens were randomly divided into 2 groups,with 6 replicates per group and 5 chickens per *** chickens were fed either a basal diet or a basal diet supplemented with 10%fructose(purity≥99%).At 4 wk later,the chickens were slaughtered,and breast and thigh muscles were collected for *** results showed that the skeletal ChREBP mRNA levels were positively associated with IMF content in multiple species,including the chickens,pigs,and mice(Pfurthermore,the lipidomics analysis revealed that ChREBP activation altered the lipid composition of chicken IMF and tented to improve the flavor profile of the *** conclusion,this study found that ChREBP plays a pivotal role in mediating the deposition of fat in chicken muscles in response to fructose-rich diets,which provides a novel strategy for improving meat quality in the livestock industry.

关键词： Chicken Meat quality Intramuscular fat Carbohydrate-response element binding protein Fructose

CaCO_(3)-MnSiO_(x)hybrid particles to enable CO_(2)-mediated combinational tumor therapy

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Nano Research 2022年第9期15卷 8281-8290页

作者： Congkun Xie tian Zhang Yike fu Gaorong Han Xiang Li State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhouZhejiang 310027China ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang UniversityHangzhou 311200China

Nanocatalysts mediated reactive oxygen species(ROS)based therapy has been exploited as an alternative therapeutic modality of tumor with high specificity and minimal side ***,the treatment outcome is limited by the efficiency of local catalytic ***,we report a novel type of core–shell hybrid nanoparticles(CaCO_(3)@MS),consisting of CaCO_(3)and MnSiO_(x),for synergistic tumor inhibition combining enhanced catalytic effect and calcium *** this system,MnSiO_(x)serves as catalysts with glutathione(GSH)responsive Mn^(2+)ions release ***_(3)nanoparticles play three important roles,including carbon dioxide(CO_(2))donor,pH modulator,and Ca^(2+)overload *** is found that the CaCO_(3)nanoparticles can induce CO_(2)production and pH increase in acidic tumor environment,both of which promote Mn^(2+)mediated ROS *** simultaneous release of Ca^(2+)ions from CaCO_(3)triggers calcium overload in tumor,which functions collaboratively with excessive ROS to induce cancer cell *** results demonstrate that after treatment with CaCO_(3)@MS,a remarkable tumor inhibition was achieved both in vitro and in vivo,while no clear toxic effect was *** study has therefore provided a feasible effective approach to improve catalytic therapeutic efficacy by an“exogenous CO_(2)delivery”strategy for combinational tumor therapy.

关键词： nanocatalytic therapy manganese silicate carbon dioxide(CO_(2)) Ca^(2+)overload pH modulation

Recent progress on multifunctional electromagnetic interference shielding polymer composites

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Journal of Materials Science & Technology 2023年第3期134卷 106-131页

作者： Ke tian Danrong Hu Quan Wei Qiang fu Hua Deng College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China Rehabilitation Medicine Center and Institute of Rehabilitation Medicine Key Laboratory of Rehabilitation Medicine in Sichuan ProvinceWest China HospitalSichuan UniversityChengdu 610041China

The explosive development of electronic devices and wireless communication technology gives rise to the issue of electromagnetic pollution,known as electromagnetic interference(EMI).The accumulation of undesirable electromagnetic radiation in space disturbs the normal function of unshielded electronic appliances and poses seriously threat to human ***,the development of EMI shielding materials have emerged to solve the grim *** the complex application contexts,EMI shielding materials have evolved from traditional single-function to multi-functions to meet the ever-increasing application requirements in recent few *** paper provides detailed insight into the current re-search status and future challenges in the advancement of polymer-based EMI shielding materials with various ***,the basic theory of EMI shielding,factors influencing results and the dominating characterization technologies for EMI shielding properties are ***,the comprehensive descriptions of the seven types of multifunctional EMI shields are provided with respect to their structures,fabrication methods and specific ***,the corresponding critical scientific and technical issues are *** on our comprehensive analysis,the main challenges in the development of multifunctional EMI shielding materials are *** review aims to provide some guidance and inspire more efforts toward functional EMI shielding material research to satisfy the growing requirements for next-generation electronic systems.

关键词： Polymer-based composites Electromagnetic interference shielding Multiple losses Multifunctionality