检索结果-南通市图书馆

Chinese Physics B 2022年第8期31卷 675-681页

作者： s sankararaman Department of Optoelectronics University of KeralaTrivandrum695581KeralaIndia

The paper employs the principles of graph theory in nanobiophotonics, where the soot-assisted intra-pigmental energy transport in leaves is unveiled through the laser-induced thermal lens(TL) technique. Nanofluids with different soot concentrations are sprayed over Lablab purpureus(L) sweet leaves, and the extracted pigments are analyzed. The graph features of the constructed complex network from the TL signal of the samples are analyzed to understand their variations with optical absorbance. Besides revealing the presence of optimum soot concentration that can enhance photosynthesis,the study brings out the potential application of graph features in nanobiophotonics.

关键词： nanobiophotonics thermal lens soot pigmental energy transfer graph theory

Reflection and transmission of quasi-plane waves at the interface of piezoelectric semiconductors with initial stresses

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2021年第7期42卷 951-968页

作者： s.A.sAHU s.NIRWAL s.MONDAL Department of Mathematics and Computing Indian Institute of Technology(ISM)Dhanbad 826004JharkhandIndia

We examine the reflection and transmission phenomena of quasi-longitudinal plane(QP)waves in an AlN-ZnO laminated composite *** structure is designed under the influence of the initial stresses in which one carrier piezoelectric semiconductor(PsC)half-space is in welded contact with another PsC *** secular equations in the transversely isotropic PsC material are derived from the general dynamic equation,taking the initial stresses into *** is shown that the incident quasi-longitudinal wave(QP-mode)at the interface generates four types of reflected and transmitted waves,namely,QP wave,quasi-transverse(QsV)wave,electric-acoustic(EA)wave,and carrier plane(CP)*** algebraic equations are obtained by imposing the boundary conditions on the common interface of the laminated *** and transmission coefficients of waves are obtained by implementing Cramer’s *** impacts of the initial stresses and exterior electric biasing field on the reflection and transmission coefficients of waves are investigated and presented graphically.

关键词： piezoelectric semiconductor(PsC) electric biasing field normal stress shear stress

Generalization of solovev's approach to finding equilibrium solutions for axisymmetric plasmas with flow

在线全文

学校读者我要写书评

暂无评论

Plasma science and Technology 2018年第3期20卷 19-32页

作者： M s CHU Yemin HU Wenfeng GUO Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People's Republic of China Center for Magnetic Fusion Theory Chinese Academy of SciencesHefei 230031People's Republic of China

solovev's approach of finding equilibrium solutions was found to be extremely useful for generating a library of linear-superposable equilibria for the purpose of shaping *** set of solutions was subsequently expanded to include the vacuum solutions of Zheng,Wootton and solano,resulting in a set of functions{sOLOVEV_ZWs}that were usually used for all toroidally symmetric plasmas,commonly recognized as being able to accommodate any desired plasma shapes(complete-shaping capability).The possibility of extending the solovev approach to toroidal equilibria with a general plasma flow is examined *** found that the only meaningful extension is to plasmas with a pure toroidal rotation and with a constant Mach *** also show that the simplification ansatz made to the current profiles,which was the basis of the solovev approach,should be applied more systematically to include an internal boundary condition at the magnetic axis;resulting in a modified and more useful set{sOLOVEV_ZWsm}.Explicit expressions of functions in this set are given for equilibria with a quasi-constant current density profile,with a toroidal flow at a constant Mach number and with specific heat capacity *** properties of{sOLOVEV_ZWsm}are studied *** examples of achievable equilibria are *** the shaping capability of the set{sOLOVE_ZWsm}is quite extensive,it nevertheless still does not have complete shaping capability,particularly for plasmas with negative curvature points on the plasma boundary such as the doublets or indented bean shaped tokamaks.

关键词： theory plasma equilibrium plasma flow

Leslie’s prey–predator model in discrete time

在线全文

学校读者我要写书评

暂无评论

International Journal of Biomathematics 2020年第6期13卷 231-255页

作者： U.A.Rozikov s.K.shoyimardonov V.I.Romanovskiy Institute of Mathematics 81 Mitzo Ulug'bek Street 100125 TashkentUzbekistan Department of Higher Mathematics Tashkent University of Information Technologies Named After Muhammad Al-Khwarizmi Tashkent Uzbekistan

We consider the Leslie’s prey–predator model with discrete *** model is given by a nonlinear evolution operator depending on five *** show that this operator has two fixed points and define type of each fixed point depending on the *** two invariant sets of the evolution operator,we study the dynamical systems generated by the operator on each invariant *** on the parameters,we classify the dynamics between a predator and a prey of the Leslie’s model.

关键词： Population Leslie model fixed points prey-predator discrete time

Biologics:how far can they go in Crohn’s disease?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Gastroenterology Report 2022年第1期10卷 155-170页

作者： Katie A.Dunleavy Darrell s.Pardi Division of Gastroenterology and Hepatology Mayo ClinicRochesterMNUSA

Crohn’s disease is a chronic gastrointestinal inflammatory disorder,characterized by episodes of relapsing and remitting *** the disease mechanism becomes better elucidated,there is a significant increase in the number of available biologic *** article summarizes and synthesizes current Food and Drug Administration-approved biological therapy for Crohn’s disease and examines the positioning of medical therapy as emerging biologics break onto the market.

关键词： Crohn’s disease medical treatment biologics anti-TNFs anti-integrins anti-interleukins JAK inhibitors s1Pinhibitors

Prof. Robert s. Warren: come early, stay late and listen

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hepatobiliary surgery and Nutrition 2020年第1期9卷 122-123页

作者：无 Robert s.Warre HBsN the University of California school of Medicine

Expert’s introduction Robert ***,MD(Figure 1)is a Professor of surgery in the University of California school of Medicine and a specialist in gastrointestinal and liver *** earned a medical degree at the University of Minnesota,where he completed a general surgery *** completing an oncology research fellowship at Memorial sloan-Kettering Cancer Center in New York,***,joined UCsF Medical Center in 1988.A board-certified surgeon,he later became the Chief of surgical Oncology at *** respected by his peers,*** was named to the list of ***"America’s Top Doctors",a distinction reserved for the top 1%of physicians in the nation for a given *** research focuses on the biology of colorectal cancer(CRC)and how it spreads.

关键词： surgery Figure Warren

Effect of temperature on the ML of Au doped(Zn,Cd)s mixed phosphors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2011年第6期22卷 709-712页

作者： Jagjeet Kaur N.s.suryanarayana Vikas Dubey Department of Physics Govt.Vishwanath Yadav Tamaskar Post Graduate Autonomous College Durg(C.G.)India

In this paper the effect of temperature on the mechanoluminescence of Au doped phosphors of（Zn,Cd）s is *** is found that the ML disappears beyond a particular *** temperature dependence of ML intensity follows the relation I =I_T^O（1-TIT_C）~n,where I_T^O is a constant,n is the slop of log I_T versus log（1- TIT_C） plot which lies between 0.9 and 1.10,T_C is the temperature at which ML *** is found that the ML intensity in（Zn,Cd）s：Au disappear at 600 K.

关键词： Mechanoluminescence Temperature dependence in Ⅱ-Ⅵ semiconductors

Dynamics of Apparent Horizons in (N+2)-Dimensional space-Times

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2012年第11期29卷 23-26页

作者： s.s.Zade Department of Mathematics J.B.College of ScienceWardhaIndia

We analyze the time of formation of central singularities in(N+2)-dimensional *** is shown that the time of formation of central singularity decreases with the increase in dimensions of the *** dynamics of trapped sur... 详细信息

关键词： singularity dimensions graphical

Thermodynamic Performance and Flammability studies of Hydrocarbon Based Low Global Warming Potential Refrigerant Mixtures

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Thermal science 2022年第5期31卷 1487-1502页

作者： Nagarjuna KUMMA s s Harish KRUTHIVENTI Department of Mechanical Engineering Low Temperature LaboratoryNational Institute of TechnologyTiruchirappalliTrichy620015India

This paper presents a theoretical method to calculate the minimum inerting concentration(MIC)of binary and ternary blends(refrigerants)that are used in small refrigeration *** is the concentration of the dilutant which makes the flammable mixture into just non-flammable(at non-zero quenching potential).In this study,the refrigerant safety parameters such as flammability,Global Warming Potential(GWP)and performance(COP)are analyzed for twelve binary and thirteen ternary blends containing one flammable and two nonflammable(dilutant)*** investigation was carried out with the hydrocarbon refrigerants R290,R600,R600a each mixed with dilutants R227ea,R125,R245fa,R13I1 and R134a at different concentrations *** methods,thermal balance method(TBM)and modified thermal balanced method(MTBM),are used to estimate the MIC(which decides the flammable zone).Thirteen ternary blends were identified based on the MIC values estimated using *** the case of ternary blends,it was observed that the non-flammable zone is high for the compositions of the Mixture G,Mixture H and Mixture *** was also estimated that the COPs of the proposed mixtures M22,M24,M25 and M27 are 4%greater than the COP of R134a(for the same operating conditions).Further,it was also understood that the corresponding GWP value is reduced by 90%to 97%for the mixtures(M21,M22,M24,M25 and M27)when compared to R134a(GWP=1300).Therefore,out of the thirteen proposed ternary mixtures(M15 to M27),the mixtures(M21,M22,M24,M25 and M27)are safe in terms of flammability,GWP and possess reasonable COP which can be a potential alternative refrigerant mixture to R134a in small refrigeration systems.

关键词： hydrocarbons minimum inerting concentration ternary Global Warming Potential

Intestinal Kaposi's sarcoma may mimic gastrointestinal stromal tumor in HIV infection

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2007年第33期13卷 4514-4516页

作者： A Zoufaly s schmiedel AW Lohse J van Lunzen Department of Medicine 1 University Medical Center Hamburg-Eppendorf Hamburg Germany Infectious Diseases Unit University Medical Center Hamburg-Eppendorf Hamburg Germany

Diffuse intestinal Kaposi＇s sarcoma shares macroscopic and histopathologic features with gastrointestinal stromal tumors. Correct diagnosis may pose a clinical challenge. We describe the case of a young HIV-1-infected African lady without advanced immunodeficiency, who presented with a diffuse spindle cell tumor of the gut. Initial diagnosis was of a gastrointestinal stromal tumor, based on endoscopy and histopathology. Further evaluation revealed evidence for human herpesvirus 8 （HHV8） and the diagnosis had to be changed to diffuse intestinal Kaposi＇s sarcoma. Antiretroviral triple therapy together with chemotherapy was commenced, and has led to the rapid remission of intestinal lesions. With a background of HIV infection, the presence of HHV8 as the causative agent of Kaposi＇s sarcoma should be determined, as distinct treatment is indicated.

关键词： Gastrointestinal stromal tumor Kaposi's sarcoma HIV infection Human herpesvirus 8 c-kit