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The Cauchy Boundary Value Problems on Closed Piecewise Smooth Manifolds in C^n

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Acta Mathematica Sinica,English Series 2004年第6期20卷 989-998页

作者： Liang Yu LIN chun hui QIU School of Mathematical Sciences Xiamen University Academy of Mathematics and System Science CAS

Suppose that D is a bounded domain with a piecewise C 1 smooth boundary in C n . Let ? ∈ C 1+α (?D). By using the Hadamard principal value of the higher order singular integral and solid angle coefficient method of points on the boundary, we give the Plemelj formula of the higher order singular integral with the Bochner–Martinelli kernel, which has integral density ?. Moreover, by means of the Plemelj formula and methods of complex partial differential equations, we discuss the corresponding Cauchy boundary value problem with the Bochner–Martinelli kernel on a closed piecewise smooth manifold and obtain its unique branch complex harmonic solution.

关键词： Bochner–Martinelli kernel Hadamard principal value Plemelj formula Boundary value problem

On-demand data broadcast scheduling based on AHP and GRA methods in wireless broadcast/UMTS integrated systems

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The Journal of China Universities of Posts and Telecommunications 2007年第4期14卷 1-6页

作者： WANG hui LI chun JI Yang Key Laboratory of Universal Wireless Communications Beijing University of Posts and Telecommunications)Ministry of Education Wireless Technology Innovation LaboratoryBeijing100876China

The increasing demand for interactive mobile multimedia service is causing the integration of 3rd generation （3G） cellular systems and wireless broadcast systems. The key challenge is to support data dissemination with low response time, request drop rate, and the unfairness of request drop. This article proposes a novel scheduling algorithm called DAG （on-demand scheduling utilizing analytic hierarchy process （AHP） and grey relational analysis （GRA））, which takes multiple factors--waiting time, number of active requests, deadline--into consideration, and models the data scheduling process as a multiple factors＇ decision-making and best option-selecting process. The proposed approach comprises two parts. The first part applies AHP to decide the relative weights of multiple decision factors according to user requests, while the second adopts GRA to rank the data item alternatives through the similarity between each option and the ideal option. Simulation results are presented to demonstrate that DAG performs well in the multiple criterions mentioned above.

关键词： AHP DAG (on-demand scheduling utilizing AHPand GRA) GRA on-demand data broadcast scheduling

2018: The Hottest Summer in China and Possible Causes

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Journal of Meteorological Research 2019年第4期33卷 577-592页

作者： Ting DING yuan yuan Jianming ZHANG hui GAO National Climate Center China Meteorological AdministrationBeijing 100081 Hunan Climate Center Changsha 410118

In 2018,China experienced the hottest summer since *** maximum,mean,and minimum temperatures all reached the *** temperatures in most regions were much higher than normal;in northern China especially,the temperature anomalies were above double of the standard *** variations of temperature anomalies appeared in the national mean and in northern China on different timescales from intraseasonal to annual,indicating that the above normal temperature in northern China contributed significantly to the record-breaking hot summer of entire *** among the high temperature in summer 2018,the tropospheric circulation,and the global sea surface temperatures(SSTs)are further *** is found that the intensified and more northward western Pacific subtropical high(WPSH),weakened Northeast China cold vortex(NECV),and positive geopotential height anomaly from northern China to the Sea of Japan resulted in the abnormally high temperature in summer *** late July to mid August,the WPSH was stronger than normal,with its ridge line jumping to north of 40°N;meanwhile,the NECV was much weaker and more northward than normal;both of the two systems led to the persistent high temperature in northern China during this *** addition,the SSTs in Kuroshio and its extension area(K–KE)in summer 2018 were also the highest since 1961 and the greatest positive SST anomaly in K–KE was favorable for the above normal geopotential height over North China–Northeast China–Japan at 500 hPa,giving rise to the exceptionally high temperature in northern China.

关键词： summer temperature western Pacific subtropical high(WPSH) Northeast China cold vortex(NECV) atmospheric circulation Kuroshio and its extension(K-KE)

Signaling pathways of chronic kidney diseases,implications for therapeutics

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Signal Transduction and Targeted Therapy 2022年第7期7卷 2245-2271页

作者： Qian yuan Ben Tang chun Zhang Department of Nephrology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China

Chronic kidney disease(CKD)is a chronic renal dysfunction syndrome that is characterized by nephron loss,inflammation,myofibroblasts activation,and extracellular matrix(ECM)*** and oxidative stress are the driving force for the loss of nephron including tubules,glomerulus,and ***3 inflammasome signaling,MAPK signaling,PI3K/Akt signaling,and RAAS signaling involves in *** upregulated Nox expression and the decreased Nrf2 expression result in oxidative stress *** injured renal resident cells release proinflammatory cytokines and chemokines to recruit immune cells such as macrophages from bone ***-κB signaling,NLRP3 inflammasome signaling,JAK-STAT signaling,Toll-like receptor signaling,and cGAS-STING signaling are major signaling pathways that mediate inflammation in inflammatory cells including immune cells and injured renal resident *** inflammatory cells produce and secret a great number of profibrotic cytokines such as TGF-β1,Wnt ligands,and angiotensin ***-βsignaling,Wnt signaling,RAAS signaling,and Notch signaling evoke the activation of myofibroblasts and promote the generation of *** potential therapies targeted to these signaling pathways are also introduced *** this review,we update the key signaling pathways of lipotoxicity,oxidative stress,inflammation,and myofibroblasts activation in kidneys with chronic injury,and the targeted drugs based on the latest *** these pathways and the targeted therapies will be instrumental to advance further basic and clinical investigation in CKD.

关键词： NLRP3 inflammation kidney

Phase Transitions in Neutron Stars Within Modified Quark-Meson Coupling Model

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Communications in Theoretical Physics 2008年第7期50卷 180-186页

作者： MA Chang-Qun GAO chun-yuan School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China

K^- condensation and quark deconfinement phase transitions in neutron stars are investigated. We use the modified quark-meson coupling model for hadronic phase and the MIT bag model for quark phase. With the equation of state （EOS） solved self-consistently, we discuss the properties of neutron stars. We find that the EOS of pure hadron matter with condensed K- phase should be ruled out by the redshift for star EX00748-676, while EOS containing unpaired quark matter phase with B1/4 being about 180 MeV could be consistent with both this observation and the best measured mass of star PSR 1913 ＋ 16. But if the recent inferred massive star among Terzan 5 with M 〉 1.68M is confirmed, all the present EOSes with condensed phase and deconfined phase would be ruled out.

关键词： neutron star modified quark-meson coupling model nuclear matter quark matter

Dunkl's Theory and Best Approximation by Entire Functions of Exponential Type in L_2-metric with Power Weight

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Acta Mathematica Sinica,English Series 2014年第10期30卷 1748-1762页

作者： Yong Ping LIU chun yuan SONG School of Mathematical Sciences Beijing Normal University Laboratory of Mathematics and Complex Systems Ministry of Education

In this paper, we study the sharp Jackson inequality for the best approximation of f ∈L2,k（Rd） by a subspace Ek2（σ）（SEk2（σ））, which is a subspace of entire functions of exponential type （spherical exponential type） at most σ. Here L2,k（Rd） denotes the space of all d-variate functions f endowed with the L2-norm with the weight vk（x）=Пζ∈R＋}（ζ,x）}2k（ζ）,which is defined by a positive subsystem R＋ of a finite root system R Rd and a function k（ζ）：R→R＋ invariant under the reflection group G（R） generated by R. In the case G（R） = Z2d, we get some exact results. Moreover, the deviation of best approximation by the subspace Ek2（σ）（SE2（σ）） of some class of the smooth functions in the space L2,k（Rd） is obtained.

关键词： Reflection group Dunkl transform Bessel function Jackson inequality continuous modulus

Multi-mode Coherent-Entangled State Representation and Its Applications

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Communications in Theoretical Physics 2008年第11期50卷 1081-1088页

作者： LI Heng-Mei yuan Hong-chun Institute for Theoretical Physics and Department of Modern Physics University of Science and Technology of China Hefei 230026 China Department of Physics Huaibei Coal Industry Teachers＇ College Huaibei 235000 China Department of Physics Shanghai Jiao Tong University Shanghai 200030 China

We introduce the so-called coherent-entangled state (CES) in the four-mode Fock space,which makesup a new quantum mechanical representation owing to completeness relation and orthogonal *** standardSchmidt decomposition and experimental generation using beam-splitter (BS) are *** addition,its applicationsin quantum optics are ***,we extend it to multi-mode case and discuss some applications,too.

关键词： coherent-entangled state (CES) representation beam splitter (BS)

Multiplicity of Positive Solutions to M-point Boundary Value Problem of Second Order Impulsive Differential Equations

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Acta Mathematicae Applicatae Sinica 2010年第1期26卷 145-158页

作者： yuan-sheng Tian chun-gen Liu Department of Mathematics Xiangnan University Chenzhou 423000 China School of Mathematics and LPMC Nankai University Tianjin 300071 China

In this paper, by using Avery-Peterson theorem on a convex cone, we consider the m-point boundary value problems for second order impulsive differential equations with the nonlinear term depending on the first order d... 详细信息

关键词： Boundary value problem impulsive differential equations fixed-point theorem positive solutions

Recovery rates of iron, nickel, and chromium via iron-bath reduction of stainless steel dust briquettes based on corundum crucible erosion balance analysis

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Journal of Iron and Steel Research International 2018年第3期25卷 320-329页

作者： Fei yuan hui-ning Zhang hui Li Jian-hong Dong hui-hui Xiong An-jun Xu School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083 China School of Metallurgy and Chemical Engineering Jiangxi University of Science and TechnologyGanzhou 341000 Jiangxi China China Metallurgical Industry Planning and Research Institute Beijing 100083 China

The leaching of chromium from stainless steel dust （SSD） is deleterious to the environment. To address this issue, the reduction of SSD briquettes can be employed to effectively extract chromium. The recovery rates of iron, chromium, and nickel via ironbath reduction of SSD briquettes were determined using X-ray fluorescence spectroscopy, X-ray diffraction, and scanning electron microscopy measurements. First, the effects of basicity and contents of silicon, iron, CaF2, and carbon on the recovery rates of the three metals were analyzed using the slag amount prediction model, which was originally established from the A1203 balance of corundum crucible erosion behavior. Second, the effect of feeding mode, i.e., whether steel scrap and SSD briquettes were simultaneously added, on the recovery rates was discussed in detail. Third, the iron-bath reduction of SSD briquettes was thermodynamically analyzed. The results indicated that the recovery rates of the three metals are greater than 95% those of using a basicity of 1.5 and 6.0% CaF2, 15% carbon, and 7% ferrosilicon. The recovery rate of chromium increases twofold with the addition of ferrosilicon. The feeding mode of adding briquettes and steel scrap simultaneously is better for recovery of metals and separation of the metal and slag than the feeding mode of adding steel scrap firstly and then briquettes.

关键词： Stainless steel dust Erosion model Ferrosilicon Iron Nickel-Chromium Recovery Iron-bath reduction