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AN APPROXIMATION SCHEME FOR BLACK-SCHOLES EQUATIONS WITH DELAYS

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Journal of Systems Science & Complexity 2010年第3期23卷 438-455页

作者： Mou-Hsiung CHANG tao pang Moustapha PEMY Mathematics Division US Army Research Office P. O. Box 12211 RTP NC 27709 USA Department of Mathematics North Carolina State University Raleigh NC 27695 USA Department of Mathematics Towson University Towson MD 21252 USA

This paper addresses a finite difference approximation for an infinite dimensional Black-Scholesequation obtained by Chang and Youree (2007).The equation arises from a consideration ofan European option pricing problem in a market in which stock prices and the riskless asset prices havehereditary *** a general condition on the payoff function of the option,it is shown thatthe pricing function is the unique viscosity solution of the infinite dimensional Black-Scholes *** addition,a finite difference approximation of the viscosity solution is provided and the convergenceresults are proved.

关键词： Black-Scholes equation finite difference stochastic functional differential equations viscosity solutions.

Fast-onset antidepressant targeting the nNOS-SERT interaction in the DRN

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Chinese Journal of Natural Medicines 2023年第1期21卷 1-2页

作者： GUAN Xin pang tao State Key Laboratory of Natural Medicines New Drug Screening CenterChina Pharmaceutical UniversityNanjing 210009China

Major depressive disorder is one of the most deleterious mental disorders with a high suicide rate,incidence and recurrence rate,which is manifested as continuous depression,retardation of thinking as well as loss of ... 详细信息

关键词： Depression nNOS SERT Antidepressant Fast-onset

Commentary:brain endothelial GSDMD as a novel target for brain disorders associated with BBB damage

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Chinese Journal of Natural Medicines 2024年第7期22卷 580-581页

作者： LIU Kui pang tao State Key Laboratory of Natural Medicines New Drug Screening and Pharmacodynamics Evaluation CenterChina Pharmaceutical UniversityNanjing 210009China

The blood-brain barrier(BBB)is a highly selective and critical interface between the blood and the central nervous system(CNS),essential for maintaining the microenvironment necessary for normal brain function and homeostasis[1].The BBB is primarily formed by brain endothelial cells(bECs),pericytes,and astrocytes,and it operates in concert with microglia/macrophages and neurons[2,3]to constitute the neurovascular unit(Fig.1).Disruption of the BBB or the presence of systemic inflammation can precipitate or exacerbate various CNS pathologies,including Alzheimer’s disease[4],amyotrophic lateral sclerosis[5],Huntington’s disease[6]and multiple sclerosis.

关键词： Brain endothelial cells GSDMD Blood-brain barrier Natural products Neuroinflammation Brain disorders

Multicolor luminescence of hexagonal NaYF_(4):Yb^(3+)/Ho^(3+)/Ce^(3+) microcrystals with tunable morphology under 940 nm excitation for temperature-responsive anti-counterfeiting

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Journal of Rare Earths 2022年第3期40卷 406-414,I0002页

作者： Lingna Xu Hongyan Zheng tao pang Junwen Mao College of Science Huzhou UniversityHuzhou 313000China

In this study,the hexagonal NaYF_(4):Yb^(3+)/Ho^(3+)/Ce^(3+) microcrystals were synthesized controllably,and upconversion luminescence excited at 940 nm and its application in temperature-responsive anti-counterfeiting are *** is clarified that the Ln^(3+)(Ln=Y+Yb+Ho+Ce)density ratio of bottom plane to side plane in the unit cell can be regulated by Ce^(3+) *** is also proved that the energy transfer of Yb^(3+) to Ho^(3+) is responsible for the activation of Ho^(3+)under 940 nm excitation,while the cross relaxation between Ho^(3+)and Ce^(3+)participates in the redistribution of electron population of^(5)S_(2)/^(5)F_(4)and^(5)F_(5)*** theory and experiment confirm that the intensity ratio of red to green emission(I_(R)/I_(G))as a function of temperature as an independent variable has good linear characteristics in the temperature range of 300-500 *** to the good responsiveness of multicolor luminescence to temperature,the hexagonal NaYF_(4):Yb^(3+)/Ho^(3+)/Ce^(3+) with tunable morphology is a promising candidate for advanced temperature-responsive upconversion *** results provide a new pathway for the controllable synthesis of hexagonal NaYF_(4)microcrystals as well as the regulation of upconversion luminescence that is excited by wavelengths other than 980 nm and its application in anti-counterfeiting.

关键词： Upconversion luminescence Color regulation Anti-counterfeiting Rare earths

Up-conversion luminescence of Er^(3+) doped and Er^(3+)/Yb^(3+) co-doped Ytao_4

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Chinese Science Bulletin 2008年第2期53卷 178-182页

作者： pang tao CAO WangHe Optoelectronic Technology Institute Dalian Maritime University Dalian 116026 China

The synthesis and up-conversion luminescent properties of Ytao4:Er3+ and Ytao4:Er3+/Yb3+ are re- ported for the first time. According to the measurement results of up-conversion spectra, Yb3+ co-doping can remarkably enhance the green (2H11/2/4S3/2→4I15/2) and red (4F9/2→4I15/2) emissions, but de- press the infrared emission (4I9/2→4I15/2). With the increase of the Yb3+ concentration, the intensity of green emission increases, after that, when the Yb3+ concentration increases continuously, the intensity of green emission decreases, while those of the red and infrared emissions increase and decrease alternately. In addition, the up-conversion mechanisms of Er3+ doped and Er3+/Yb3+ co-doped Ytao4 are also discussed. It is found that the transform of up-conversion mechanism from two-step energy transfer to cooperating sensitization takes place when Yb3+ concentration is increased up to 12 mol%. With the further increase of Yb3+ concentration, the energy-back-transfer gradually becomes the dominant up-conversion mechanism, which results in the quenching of the green emission and slight increasing of the red and infrared emissions.

关键词：上升转换率能量转换协同感光能量回转

Synthesis,upconversion luminescence and optical heating of hexagonal NaGdF_4:Yb^(3+),Er^(3+)

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Journal of Rare Earths 2018年第11期36卷 1136-1140页

作者： tao pang Wenbo Peng Ming Yang Jianping Xie Wenhui Lu College of Science Huzhou University

An optical heater based on hexagonal NaGdF^4＋Yb^3＋/Er^3＋ is reported. XRD, SEM and EDS characterization results show that F /Ln^3＋ can not only control the phase composition, particle size and morphology, but also affect the effective doping concentration of Yb^3＋ and Er^3＋. When F /Ln^3＋ is 12/1, the strongest upconversion luminescence is obtained. Based on the luminescent temperature sensing behavior of Er^3＋, the photo-thermal conversion performance was investigated. The results indicate that the temperature of irradiation spot is linearly dependent on the power density, and the photo-thermal responsivity is determined to be 3.3 K-cm2/W. Also, it is found that the photo-thermal conversion efficiency can be regulated by changing the Yb3~ doping concentration. Compared with the nano-gold, copper sulfide and carbon nanotubes, the NaGdF4：Yb^3＋/Er^3＋has the triple functions of upconversion luminescence, temperature sensing, and photo-thermal conversion, and may therefore be a promising optical heater for photo-thermal therapy of tumors.

关键词： Hycirothermal synthesis Upconversion Temperature sensing Optical heater NaGdF4 Rare earths

Optimized Fault Detection Algorithm Aided by BDS Baseband Signal for Train Positioning

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Chinese Journal of Electronics 2020年第1期29卷 34-40页

作者： WANG Ershen YANG Di WANG Chuanyun Huang Yufeng QU Pingping pang tao School of Electronic and Information Engineering Shenyang Aerospace University Liaoning General Aviation Key Laboratory Shenyang Aerospace University School of Computer Science and Engineering Shenyang Aerospace University

The satellite navigation integrity monitoring technology is closely related to the reliability of train positioning. It is of great significance to study satellite navigation Receiver autonomous integrity monitoring(RAIM) algorithm suitable for train positioning. Some existing conventional RAIM algorithms do not consider the influence of satellite navigation signal on algorithms *** at the influence of satellite navigation signal on the propagation processes, such as shadow and multipath effects, the fault detection algorithm based on BeiDou navigation satellite system(BDS) baseband signal is *** innovation parameters contained in the satellite navigation baseband signal are combined into the covariance matrix to set up a new test statistics of RAIM. A new fault detection algorithm based on optimized BDS baseband signal is discussed. And combined with weighted least square method, the noise power balance factor is established to realize satellite fault detection. Experimental results show that the proposed algorithm can improve the monitoring performance of train satellite positioning integrity, and lay the foundation for meeting the railway industry’s security requirements for positioning services.

关键词： BeiDou navigation satellite system(BDS) Train positioning Receiver autonomous integrity monitoring(RAIM) Baseband signal Fault detection(FD) Test statistics

Linking China's emissions trading pilot schemes

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Chinese Journal of Population,Resources and Environment 2015年第3期13卷 215-222页

作者： tao pang Li Zhou Maosheng Duan Institute of Energy Environment and EconomyTsinghua University

All seven emissions trading pilots in China operate *** challenge facing most of them is the low inclusion thresholds for enterprises and the few total covered emissions,which negatively influences the effects of the emissions trading systems(ETSs).Some pilot sites,such as Guangdong,Hubei,Tianjin and Beijing,have indicated their willingness to link their schemes with *** linking could expand scheme coverages and therefore help to reduce the overall costs of achieving the linked schemes' emissions control *** could also help to address the issues of carbon leakage and reduce price *** potential benefits and feasibility of linking different pilot systems are analyzed in this *** seven pilot regions are at different stages of social and economic development,with significant differences in total emissions and emissions structures as well as carbon abatement potentials and *** linking,more-developed regions such as Beijing,Shanghai and Shenzhen,which are typically considered to face higher mitigation costs,will have the opportunity to achieve their emissions control targets by purchasing carbon units from less-developed regions,which will earn financial revenues from selling the *** realize this win-win result,a series of policy and technical barriers at both the central government and pilot government levels needs to be *** a unified national emissions trading market would appear to be the ideal solution to these challenges,but it will take considerable time and will not be the short-term *** the absence of a unified national scheme,it is recommended that the central government encourage pilot schemes to link,that it develops corresponding national policies to support the linking efforts and that the pilot schemes that are intended to be linked coordinate on certain design *** on the coordinating need,the major elements of an ETS can be divided into four categories:

关键词： emissions trading carbon trading linking regional carbon market

Preparation and luminescence properties of monodisperse silica/aminosilane-coated Y_2O_3:Yb,Ho upconversion nanoparticles

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Chinese Science Bulletin 2011年第2期56卷 137-141页

作者： pang tao CAO WangHe XING MingMing LUO XiXian XU ShuJing Optoelectronic Technology Institute Dalian Maritime University Dalian 116026 China

Monodisperse silica/aminosilane-coated Y 2 O 3:Yb,Ho nanoparticles are prepared via homogenous precipitation combined with a polyvinylpyrrolidone-assisted ammoniation *** factors that contribute to the success of the coating are examined,and the procedure is *** with uncoated nanoparticles,coated nanoparticles exhibit an increased ratio of green to red emission intensity,which can mainly be attributed to the decreased number of surface defects induced by the surface coating.

关键词：单分散二氧化硅纳米涂层 Y2O3 氨基硅烷纳米颗粒发光性能制备上转换