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Hydrodynam.c Coefficients and Wave Excitation Forces for A Ship near A Quay

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海洋工程：英文版 2004年第1期18卷 119-128页

作者： m. hasan Adil 段文洋 College of Shipbuilding Engineering

In this paper, the effects of a quay or a solid jetty on hydrodynam.c coefficients and vertical wave excitation forces on a ship with or without forward speed are discussed. A m.dified sim.le Green function technique is used to calculate the 2D coefficients while the strip theory is used to calculate the 3D coefficients. Wave excitation forces are also calculated with the strip theory. Num.rical results are provided for hydrodynam.c coefficients and vertical wave excitation forces on a 200 000 DWT tanker ship. It is found that the quay has a considerable effect on the hydrodynam.c coefficients and wave excitation forces for a ship.

关键词： hydrodynam.c coefficients Green function technique strip theory quay jetty

PET微塑料水解再造缺陷铁基金属有机框架及其应用研究

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中国环境科学 2024年第9期44卷 5222-5233页

作者：蒋文斌姜晨晨韦选香徐李聪王姗丽 hasan m. Shahib 吴明华余德游浙江理工大学纺织科学与工程学院(国际丝绸学院) 浙江理工大学生态染整技术教育部工程研究中心浙江杭州310018 浙江理工大学桐乡研究院有限公司浙江桐乡314500

为了有效去除聚对苯二甲酸乙二酯(PET)微塑料,采用碱性水解方法将PET微塑料升级再造,制备缺陷铁基金属有机框架(Fe-m.Fs)催化剂,用于催化臭氧深度处理模拟印染废水.结果表明,在Na OH浓度为2m.l/L、水解温度120℃、水解时间120m.n的条件... 详细信息

为了有效去除聚对苯二甲酸乙二酯(PET)微塑料,采用碱性水解方法将PET微塑料升级再造,制备缺陷铁基金属有机框架(Fe-m.Fs)催化剂,用于催化臭氧深度处理模拟印染废水.结果表明,在Na OH浓度为2m.l/L、水解温度120℃、水解时间120m.n的条件下,PET微塑料去除率达100%,对苯二甲酸钠盐(Na_(2)TPA)产率达97.4%;以PET微塑料水解产物为前驱体,发展了2种简易方法制备缺陷型Fe-m.Fs催化剂.通过扫描电子显微镜(SEm.、X射线粉末衍射仪(PXRD)、傅里叶红外光谱仪(FT-IR)及X射线光电子能谱仪(XPS)等对缺陷Fe-m.Fs催化剂的形貌特征、晶体结构、分子结构以及元素种类进行表征,证明催化剂具有缺陷结构.研究评估了2种催化剂催化臭氧降解AO-7性能,其中D-Fe-m.F催化剂可在3m.n内完全降解AO-7,反应速率常数达0.926m.n^(-1),是W-Fe-m.F催化剂和单独臭氧的3.6倍和7.3倍.

关键词： PET微塑料碱性水解升级再造缺陷金属有机框架催化臭氧

Radioactivity Levels and Gam.a-Ray Dose Rate in Soil Sam.les from.Kohistan （Pakistan） Using Gam.a-Ray Spectrom.try

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Chinese Physics Letters 2011年第1期28卷 226-229页

作者： hasan m. Khan m. Ism.il K. Khan P. Akhter National Center of Excellence in Physical Chem.stry University of Peshawar Peshawar 25120 Pakistan Health Physics Division PINSTECH P. O. Nilore Islamabad Pakistan

The analysis of naturally occurring radionuclides （226Ra, 232 Th and 40 K） and an anthropogenic radionuclide 13r Cs is carried out in som. soil sam.les collected from.Kohistan district of N.W.F.P. （Pakistan）, using gam.a-ray spectrom.try. The gam.a spectrom.try is operated using a high purity Germ.nium.（HPGe） detector coupled with a com.uter based high resolution m.lti channel analyzer. The specific activity in soil ranges from.24.72 to ***-1 for 22TRa, 21.73 to ***- 1 for 232Th, 7.06 to *** 1 for 1arcs and 298.46 to ***-1 for 40K with the m.an values of 42.11, 43.27, 9.5 and ***-1, respectively. The radium.equivalent activity in all the soil sam.les is lower than the safe lim.t set in the OECD report （370 ***-1）. m.n-m.de radionuclide 13r Cs is also present in detectable am.unt in all sell sam.les. Presence of 13r Us indicates that the sam.les in this renlote area also recelvo som. fallout from.nuclear accident in Chernobyl power plant in 1986. The internal and external hazard indices have the m.an values of 0.48 and 0.37 respectively. Absorbed dose rates and effective dose equivalents are also determ.ned for the sam.les. The concentration of radionuclides found in the soil sam.les during the present study is nom.nal and does not pose any potential health hazard to the general public.

关键词： Instrum.ntation and m.asurem.nt Environm.ntal and Earth science

Enhancem.nt of the Sensitivity of Gas Sensor Based on m.crostructure Optical Fiber

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Photonic Sensors 2015年第4期5卷 312-320页

作者： m.nir m.RSHED m.. Im.an hasan S. m. Abdur RAZZAK Departm.nt of lnform.tion and Com.unication Technology Mawlana Bhashani Science and Technology University Tangail-1902 Bangladesh Departm.nt of Electronics & Telecom.unication Engineering Rajshahi University of Engineering & Technology Rajshahi-6204 Bangladesh Departm.nt of Electrical & Electronic Engineering Rajshahi University of Engineering & Technology Rajshahi-6204 Bangladesh

This paper proposes the design and characterization of m.crostructure optical fiber for gas sensing applications. The aim.is to detect toxic and colorless gases over a wide transm.ssion band covering 0.80 gm.to 2.00gm.wavelength. Num.rical investigation is carried out by using the finite elem.nt m.thod （FEm.. The num.rical study shows that sensitivity of the proposed sensor is m.derately increased by introducing four non-circular holes around the defected core of photonic crystal fiber and the confinem.nt loss is also reduced. Furtherm.re, we confirm.that increasing the diam.ter of central air core and size of the non-circular holes can im.rove the relative sensitivity and the confinem.nt loss is reduced by increasing the diam.ter of air holes in the cladding. The enhancem.nt of the relative sensitivity is m.re than 27.58% （0.1323 to 0.1688） at the wavelength 2=1.33gm.that is the absorption line of m.thane （CH4） and hydrogen fluoride （HF） gases. The confinem.nt loss of the fiber is 1.765x 10-8dB/m.

关键词： Confinem.nt loss gas sensor hollow core photonic crystal fiber m.crostrucm.e fiber relativesensitivity

Effect of Bohm.quantum.potential in the propagation of ion–acoustic waves in degenerate plasm.s

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Chinese Physics B 2016年第10期25卷 222-229页

作者： m.m.hasan m.A Hossen A Rafat A A m.m.n Departm.nt of Physics Jahangirnagar University

A theoretical investigation has been carried out on the propagation of the ion–acoustic(IA) waves in a relativistic degenerate plasm. containing relativistic degenerate electron and positron fluids in the presence of inertial non-relativistic light ion fluid. The Korteweg-de Vries(K-dV), m.dified K-dV(m.K-dV), and m.xed m.K-dV(m. K-dV) equations are derived by adopting the reductive perturbation m.thod. In order to analyze the basic features(phase speed, am.litude, width,etc.) of the IA solitary waves(SWs), the SWs solutions of the K-dV, m.K-dV, and m. K-d V are num.rically analyzed. It is found that the degenerate pressure, inclusion of the new phenom.na like the Ferm. tem.eratures and quantum.m.chanical effects(arising due to the quantum.diffraction) of both electrons and positrons, num.er densities, etc., of the plasm. species rem.rkably change the basic characteristics of the IA SWs which are found to be form.d either with positive or negative potential. The im.lication of our results in explaining different nonlinear phenom.na in astrophysical com.act objects, e.g.,white dwarfs, neutron stars, etc., and laboratory plasm.s like intense laser–solid m.tter interaction experim.nts, etc., are m.ntioned.

关键词： Bohm.quantum.potential degenerate relativistic plasm. electron and positron quantum.effect

聚乙烯醇/透明质酸复合导电水凝胶的制备及其传感和抗菌性能

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现代纺织技术 2024年第8期32卷 23-34页

作者：王艳敏丁新波刘涛仇巧华 hasan m. Kam.ul 朱灵奇周家宝浙江理工大学纺织科学与工程学院(国际丝绸学院) 杭州310018

为制备兼具传感和抗菌功能的导电水凝胶,以聚乙烯醇(PVA)和透明质酸(HA)为原料,通过原位聚合和冻融法制得氧化锌/聚(3,4-乙烯二氧噻吩)/聚乙烯醇/透明质酸(ZnO/PEDOT/PVA/HA,简写ZP)导电水凝胶;并对其形貌、结构组成、力学性能、传感性... 详细信息

为制备兼具传感和抗菌功能的导电水凝胶,以聚乙烯醇(PVA)和透明质酸(HA)为原料,通过原位聚合和冻融法制得氧化锌/聚(3,4-乙烯二氧噻吩)/聚乙烯醇/透明质酸(ZnO/PEDOT/PVA/HA,简写ZP)导电水凝胶;并对其形貌、结构组成、力学性能、传感性能及其抗菌性能进行分析。结果表明:氧化锌的质量分数在0.3%时,ZP导电水凝胶的电导率最高可达2.91 S/m.ZP导电水凝胶具有良好的拉伸应变性能(≥100%)、灵敏的响应速度(m.)和较好的稳定性(>1000次),能够对人体不同部位的运动信号进行监测识别;此外,ZP导电水凝胶对金黄色葡萄球菌(***)和大肠杆菌(***)具有良好的抑制效果。该导电水凝胶在柔性可穿戴传感器及医疗健康监测方面具有良好的应用前景。

关键词：导电水凝胶传感性能柔性可穿戴传感器抗菌性能

A New Approach to Solving Two-Dim.nsional Unsteady Incom.ressible Navier-Stokes Equations

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Journal of Applied m.them.tics and Physics 2022年第10期10卷 3218-3239页

作者： zinah Abdulkadhim.hasan Abdul-Sattar J. Al-Saif Departm.nt of m.them.tics College of Education for Pure Science University of Basrah Basra Iraq

This paper proposes a new approach that com.ines the reduced differential transform.m.thod (RDTm., a resum.ation m.thod based on the Yang transform. and a Padé approxim.nt to the kinetically reduced local Navier-Stokes equation to find approxim.te solutions to the problem.of lid-driven square cavity flow. The new approach, called PYRDm. considerably im.roves the convergence rate of the truncated series solution of RDTm.and also is based on a sim.le process that yields highly precise estim.tes. The num.rical results achieved by this m.thod are com.ared to earlier studies’ results. Our results indicate that this m.thod is m.re efficient and precise in generating analytic solutions. Furtherm.re, it provides highly precise solutions with good convergence that is sim.le to apply for great Reynolds and low m.ch num.ers. m.reover, the new solution’ graphs dem.nstrate the new approach’s validity, usefulness, and necessity.

关键词： Navier-Stokes Equations RDTm Yang Transform Padé Approxim.tion Accuracy Convergence Analysis

Innovations in endoscopic ultrasound for portal hypertension and its role in m.naging com.lications in clinical practice:Lessons learned from.a tertiary referral public hospital

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Portal Hypertension & Cirrhosis 2024年第1期3卷 31-35页

作者： Cosm.s R.A.Lesm.na Kem.l F.Kalista Saut H.H.Nababan Juferdy Kurniawan Chyntia O.m.Jasirwan Andri S.Sulaim.n Irsan hasan Rino A.Gani Departm.nt of Internal m.dicine Hepatobiliary DivisionDr.Cipto Mangunkusumo National General HospitalMedical Faculty Universitas IndonesiaJakartaIndonesia Digestive Disease&GI Oncology Center Medistra HospitalJakartaIndonesia Gastrointestinal Cancer Center MRCCC Siloam Semanggi HospitalJakartaIndonesia

Portal hypertension(PH)poses significant *** paper presents an innovative study on the utilization of endoscopic ultrasound(EUS)for both the diagnosis and m.nagem.nt of *** at *** m.ngunkusum. National General Hospital in Jakarta,this retrospective case series included patients diagnosed with PH through clinical exam.nation,im.ging evaluation,and *** criteria com.rised a history of reduced blood consum.tion within the last 5 days,hepatocellular carcinom.,m.ssive ascites,or elevated international norm.lized ratio(>1.4).EUS-guided portal pressure gradient(PPG)m.asurem.nts were perform.d using an innovative standard *** study involved 15 patients,with 14 having liver cirrhosis and 1 diagnosed with Budd–Chiari *** them.nine patients experienced bleeding due to gastroesophageal *** and large esophageal varices were identified in four and eight patients,*** varices type 1 were observed in two patients,and type 2 in four *** gastric fundal varices type 1 were present in one *** on EUS-PPG m.asurem.nts,14 patients exhibited clinically significant portal *** patients underwent endoscopic band ligation and three underwent EUS-guided cyanoacrylate injection during the sam. session as the EUS-PPG m.asurem.nt ***,no adverse events,such as abdom.nal pain,perforation,or bleeding were observed during or after the *** em.rges as a prom.sing and accurate tool for both diagnosis and m.nagem.nt.

关键词： cyanoacrylate injection endoscopic ultrasound liver cirrhosis portal hypertension portal pressure gradient

Rice plant growth and yield: foliar application of plasm. activated water

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Plasm. Science and Technology 2021年第7期23卷 134-143页

作者： m.m.RASHID m.m.nur RASHID m.m.hasan m.R TALUKDER Plasm. Science and Technology Lab Department of Electrical and Electronic EngineeringUniversity of RajshahiRajshahi 6205Bangladesh Plant Pathology and m.cology Lab Department of BotanyUniversity of RajshahiRajshahi 6205Bangladesh Plant Pathology Lab Department of Agronomy and Agricultural ExtensionUniversity of RajshahiRajshahi 6205Bangladesh

Plasm. activated water(PAW)was prepared for 10 m.n to be applied one toﬁve tim.s as a foliar spray to rice plants,to investigate plant growth,yield and the concentrations of total soluble protein and sugar in the rice grains *** results reveal that(1)the plant height,stem.diam.ter,dry weight,chlorophyll and total carotene concentrations were im.roved by∼15%,∼25%,∼24%,∼47%and∼45%,respectively,with respect to control,(2)defense m.chanism. of the plants treated with PAW were im.roved,(3)concentrations of total soluble protein and sugar were enhanced in the rice grains of PAW treated plants and(4)yield was increased by∼14%.

关键词： plasm. agriculture plasm. activated water rice plant growth rice yield total soluble protein