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The Mathematical Model for Streptococcus suis Infection in Pig-Human Population with Humidity Effect

Computers, Materials & Continua 2022年第5期71卷 2981-2998页

作者： Inthira Chaiya Kamonchat Trachoo kamsing nonlaopon Din Prathumwan Department of Mathematics Faculty of ScienceMahasarakham UniversityMahasarakham44150Thailand Department of Mathematics Faculty of ScienceKhon Kaen UniversityKhon Kaen40002Thailand

In this paper,we developed a mathematical model for Streptococcus suis,which is an epidemic by considering the moisture that affects the *** disease is caused by Streptococcus suis infection found in pigs which can be transmitted to *** patients of Streptococcus suis were generally found in adults males and the elderly who contacted pigs or who ate uncooked *** human cases,the infection can cause a severe illness and *** disease has an impact to the financial losses in the swine *** the development of models for this disease,we have divided the population into 7 related groups which are susceptible pig compartment,infected pig compartment,quarantined pig compartment,recovered pig compartment,susceptible human compartment,infected human compartment,and recovered human *** that,we use this model and a quarantine strategy to analyze the spread of the *** addition,the basic reproduction number R0 is determined by using the next-generation matrix which can analyze the stability of the *** numerical simulations of the proposed model are illustrated to confirm the results from *** results showed that there is an effect from moisture to the disease *** the moisture increases the disease infection also increases.

关键词： Streptococcus suis mathematical model stability analysis infectious disease reproduction number

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Simulation of Non-Isothermal Turbulent Flows Through Circular Rings of Steel

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Computers, Materials & Continua 2022年第3期70卷 4341-4355页

作者： Abid.A.Memon M.Asif Memon Kaleemullah Bhatti kamsing nonlaopon Ilyas Khan Department of Mathematics and Social Sciences Sukkur IBA UniversitySukkur65200SindhPakistan Department of Mathematics Faculty of ScienceKhon Kaen UniversityKhon Kaen40002Thailand Department of Mathematics College of Science Al-ZulfiMajmaah UniversityAl-Majmaah11952Saudi Arabia

This article is intended to examine the fluid flow patterns and heat transfer in a rectangular channel embedded with three semi-circular cylinders comprised of steel at the *** an organization is used to generate the heat exchangers with tube and shell because of the production of more turbulence due to zigzag path which is in favor of rapid heat *** of little maintenance,the heat exchanger of such type is extensively ***,we generate simulation of flow and heat transfer using nonisothermal flow interface in the Comsol multiphysics 5.4 which executes the Reynolds averaged Navier stokes equation(RANS)model of the turbulent flow together with heat *** is tested with Prandtl number(Pr=0.7)with inlet velocity magnitude in the range from 1 to 2 m/sec which generates the Reynolds number in the range of 2.2×10^(5) to 4.4×10^(5) with turbulence kinetic energy and the dissipation rate in ranges(3.75×10^(−3) to 1.5×10^(−2))and(3.73×10^(−3)−3×10^(−2))*** correlations available in the literature are used in order to check *** results are displayed through streamlines,surface plots,contour plots,isothermal lines,and *** is concluded that by retaining such an arrangement a quick distribution of the temperature over the domain can be seen and also the velocity magnitude is increasing from 333.15%to a maximum of 514%.The temperature at the middle shows the consistency in value but declines immediately at the *** process becomes faster with the decrease in inlet velocity magnitude.

关键词： Incompressible turbulent flow heat transfer non-isothermal finite element method energy equation

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波面倾斜脉冲泵浦的高效可见光飞秒光参量产生和放大器

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中国激光 1997年第9期24卷 779-783页

作者：丘志仁黄锦圣汪鸿余振新 G.K.L.Wong 中山大学超快速激光光谱学国家重点实验室香港科技大学物理系

利用脉冲波面倾斜技术补偿三波相互作用的群速度失配，建立了掺钛蓝宝石飞秒再生放大器输出倍频光泵浦共线类匹配ＢＢＯ晶体的光参量产生和放大器，其信号和空闲光输出调谐范围为０．４７～２．７μｍ，脉冲宽度为１００～１７０ｆｓ，... 详细信息

利用脉冲波面倾斜技术补偿三波相互作用的群速度失配，建立了掺钛蓝宝石飞秒再生放大器输出倍频光泵浦共线类匹配ＢＢＯ晶体的光参量产生和放大器，其信号和空闲光输出调谐范围为０．４７～２．７μｍ，脉冲宽度为１００～１７０ｆｓ，重复率为１ｋＨｚ。脉冲最大输出能量为６．５μＪ，总能量转换效率大于１５％。

关键词：飞秒激光脉冲光参量放大器光泵浦

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