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15篇 您的检索式:作者名="Rumpa"
    题名 作者 年代 出处 被引量
1A review on sources, toxicity and remediation technologies for removing arsenic from drinking water显示文摘Ankita Basu Debabrata Saha Rumpa Saha Tuhin Ghosh Bidyut Saha 2014Research on Chemical Intermediates2014,,2:1
2Ultrasound guided fine needle aspiration cytology: a sensitive diagnostic tool for diagnosis of inWa-abdominal lesions 显示文摘Islam T Hossain F Rumpa AP 2013Bangladesh Med Res Counc Bull2013,39,1:1
3Malignant extragas-trointestinal stromal tumors : what are the prognostic fea-tures to depend upon 显示文摘Usha D Rumpa D Asha A 2011J Clin Diagn Res2011,5,2:1
4Mycological Profile of Infecious Keratitis from Delhi显示文摘Rumpa Saha Shukla Das 2006Indian J Med Res2006,123,:1
5Mechanics of Pb40/Sn60 near-eutectic solder alloys subjected to vibrations显示文摘Cemal Basaran Rumpa Chandaroy 1998Applied Mathematical Modeling1998,22,1998:1
6Ultrasound guided fine needle aspiration cytology:a sensitive diagnostic tool for diagnosis of intra-abdominal lesions显示文摘Islam T Hossain F Rumpa AP 2013Banglad Med Res Counc Bull2013,39,1:1
7Use of nitrogen-fix- ing bacteria as biofertiliser for non-legumes, prospects and chal- lenges显示文摘Rumpa B B Aqbal S Mukhopadhyay S N 2008Appl Microbiol Biotechnol2008,80,:1
8Mechanics of Sn60Pb40enar eutetic solder allays subjected to vibrations 显示文摘Cemal Basaran Rumpa Chandaroy 1998Applied mathematical modeling1998,,22:1
9Mechanics of Pb40/Sn60 near-eutectic solder alloys subjected to vibrations显示文摘Cemal Basaran Rumpa Chandaroy 1998Applied Mathematical Modelling1998,,8:1
10Scattering of water waves by thick rectangular barriers in presence of ice cover显示文摘Assuming linear theory,the two dimensional problem of water wave scattering past thick rectangular barrier in presence of thin ice cover,is investigated here.Mainly four types of thick barriers are considered here and also the ice cover is taken as a thin elastic plate.May be the barrier is partially immersed or bottom standing or fully submerged in water or in the form of thick rectangular wall with a submerged gap presence in water.The problem is formulated in terms of a first kind integral equation by considering the symmetric and antisymmetric parts of velocity potential function.The integral equation is solved by using multi term Galerkin approximation method involving ultraspherical Gegenbauer polynomials as its basis function.The numerical solutions of reflection and transmission coefficients are obtained for different parametric values and these are seen to satisfy the energy identity.These coefficients are depicted graphically against the wave number in a number of figures.Some figures available in the literature drawn by using different mathematical methods as well as laboratory experiments are also recovered following the present analysis without the presence of ice cover,thereby confirming the correctness of the results presented here.It is also observed that the reflection and transmission coefficients depend significantly on the width of the barriers.Anushree Samanta Rumpa Chakraborty 2020Journal of Ocean Engineering and Science2020,5,3:0
11Water Wave Scattering by a Nearly Circular Cylinder Submerged Beneath an Ice-cover显示文摘假定线性理论,水波浪由水平将近圆形的柱体散布的二维的问题在无穷地深的水里沉没了,一个冰封面作为漂浮在水上的一个薄橡皮的盘子当模特儿,这里被调查。将近圆形的柱体的剖面图作为 r=a 被拿(1+C ()) 一是柱体的相应圆形的剖面图的半径,是从它的圆的柱体的剖面图的小离开的一项措施, C() 是形状功能。用一种简化不安技术,这个问题被归结为二个独立边界价值问题直到第一份订单在里面。第一通信浇波浪由圆形的柱体散布与一个冰封面在水里沉没了,当第二个问题由沉没圆形的柱体描述波浪放射并且首先包含顺序修正到思考和传播系数时。修正以包含形状功能的积分被获得。假定形状功能的一般 Fourier 扩大,这些修正近似被评估。通常,事件波浪火车不由圆形的柱体经历思考,是众所周知的与一个冰封面在无穷地深的水里沉没了。思考系数也为代表将近圆形的柱体的形状功能的某特别选择消失直到第一份订单,这这里被显示出。为这些盒子,完整的传播发生,仅仅变化在它在很多个数字对波浪数字图形地被描绘的阶段,适当结论被得出。Rumpa Chakraborty Birendra Nath Mandal 2015Journal of Marine Science and Application2015,14,1:0
12初始轴对称扰动在具有可渗透海底特征的冰覆盖海洋表面产生的重力波研究显示文摘This paper is concerned with the generation of gravity waves due to prescribed initial axisymmetric disturbances created at the surface of an ice sheet covering the ocean with a porous bottom.The ice cover is modeled as a thin elastic plate,and the bottom porosity is described by a real parameter.Using linear theory,the problem is formulated as an initial value problem for the velocity potential describing the motion.In the mathematical analysis,the Laplace and Hankel transform techniques have been used to obtain the depression of the ice-covered surface in the form of a multiple infnite integral.This integral is evaluated asymptotically by the method of stationary phase twice for a long time and a large distance from the origin.Simple numerical computations are performed to illustrate the efect of the ice-covered surface and bottom porosity on the surface elevation,phase velocity,and group velocity of the surface gravity waves.Mainly the far-feld behavior of the progressive waves is observed in two diferent cases,namely initial depression and an impulse concentrated at the origin.From graphical representations,it is clearly visible that the presence of ice cover and a porous bottom decreases the wave amplitude.Due to the porous bottom,the amplitude of phase velocity decreases,whereas the amplitude of group velocity increases.Piyali Kundu Rumpa Chakraborty 2021Journal of Marine Science and Application2021,20,4:0
13天然表面活性剂(续完)显示文摘11成本分析在建设和运作工厂之前,工艺的设计和经济评估是很重要的,这需要结合工程学的知识[66]。总体成本分析包括评估资本和运营开支。基于由Superpro Designer模拟软件开发的工艺经济模型,由葡萄糖和高油酸的葵花籽油生产907 00 t的槐糖脂的年运营成本为2.68亿美元,单位生产成本每千克2.95美元。肖进新(译) Sourav De Susanta Malik Aniruddha Ghosh Rumpa Saha Bidyut Saha 2017日用化学品科学2017,40,6:0
14孔隙率对矩形沟槽上垂直多孔屏障的波浪散射效应影响显示文摘The effect of porosity on surface wave scattering by a vertical porous barrier over a rectangular trench is studied here under the assumption of linearized theory of water waves.The fluid region is divided into four subregions depending on the position of the barrier and the trench.Using the Havelock’s expansion of water wave potential in different regions along with suitable matching conditions at the interface of different regions,the problem is formulated in terms of three integral equations.Considering the edge conditions at the submerged end of the barrier and at the edges of the trench,these integral equations are solved using multi-term Galerkin approximation technique taking orthogonal Chebyshev’s polynomials and ultra-spherical Gegenbauer polynomial as its basis function and also simple polynomial as basis function.Using the solutions of the integral equations,the reflection coefficient,transmission coefficient,energy dissipation coefficient and horizontal wave force are determined and depicted graphically.It was observed that the rate of convergence of the Galerkin method in computing the reflection coefficient,considering special functions as basis function is more than the simple polynomial as basis function.The change of porous parameter of the barrier and variation of trench width and height significantly contribute to the change in the scattering coefficients and the hydrodynamic force.The present results are likely to play a crucial role in the analysis of surface wave propagation in oceans involving porous barrier over submarine trench.Gour Das Rumpa Chakraborty 2024哈尔滨工程大学学报(英文版)2024,23,1:0
15有限水深中垂直下潜弹性薄板的水波散射(英文)显示文摘The problem of water wave scattering by a thin vertical elastic plate submerged in uniform finite depth water is investigated here.The boundary condition on the elastic plate is derived from the Bernoulli-Euler equation of motion satisfied by the plate.Using the Green’s function technique,from this boundary condition,the normal velocity of the plate is expressed in terms of the difference between the velocity potentials(unknown)across the plate.The two ends of the plate are either clamped or free.The reflection and transmission coefficients are obtained in terms of the integrals’involving combinations of the unknown velocity potential on the two sides of the plate,which satisfy three simultaneous integral equations and are solved numerically.These coefficients are computed numerically for various values of different parameters and depicted graphically against the wave number in a number of figures.Rumpa Chakraborty B. N. Mandal 2013Journal of Marine Science and Application2013,12,4:0
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