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Journal of Shanghai Jiaotong university(Science) 2011年第6期16卷 696-703页

作者： SANGEETA Mandal SAKTI Prasad Ghoshal rajib kar DURBADAL Mandal Department of Electrical Engineering Department of Electronics and Communication Engineering National Institute of Technology

An efficient method is proposed for the design of finite impulse response(FIR) filter with arbitrary pass band edge,stop band edge frequencies and transition *** proposed FIR band stop filter is designed using craziness based particle swarm optimization(CRPSO) *** the filter specifications to be realized,the CRPSO algorithm generates a set of optimal filter coefficients and tries to meet the ideal frequency response *** this paper,for the given problem,the realizations of the optimal FIR band pass filters of different orders have been *** simulation results have been compared with those obtained by the well accepted evolutionary algorithms,such as Parks and McClellan algorithm(PMA),genetic algorithm(GA) and classical particle swarm optimization(PSO).Several numerical design examples justify that the proposed optimal filter design approach using CRPSO outperforms PMA and PSO,not only in the accuracy of the designed filter but also in the convergence speed and solution quality.

关键词： finite impulse response(FIR) filter particle swarm optimization(PSO) craziness based particle swarm optimization(CRPSO) Parks and McClellan algorithm(PMA) genetic algorithm(GA) optimization

Enhancing modelling accuracy of cascaded spline adaptive filters using the remora optimisation algorithm: application to real-time systems

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Frontiers of Information Technology & Electronic Engineering 2024年第11期25卷 1515-1535页

作者： Janjanam, Lakshminarayana Saha, Suman Kumar kar, rajib JNTUK Recognized Research Center Department of Electronics & Communication Engineering Sasi Institute of Technology & Engineering Tadepalligudem India Department of Electronics & Communication Engineering National Institute of Technology Raipur India Department of Electronics & Communication Engineering National Institute of Technology Durgapur India

We first introduce a new approach for optimising a cascaded spline adaptive filter (CSAF) to identify unknown nonlinear systems by using a meta-heuristic optimisation algorithm (MOA). The CSAF architecture combines Hammerstein and Wiener systems, where the nonlinear blocks are implemented with the spline network. The algorithms used optimise the weights of the spline interpolation function and linear filter by using an adequately weighted cost function, leading to improved filter stability, steady state performance, and guaranteed convergence to globally optimal solutions. We investigate two CSAF architectures: Hammerstein–Wiener SAF (HW-SAF) and Wiener–Hammerstein SAF (WH-SAF) structures. These architectures have been designed using gradient-based approaches which are inefficient due to poor convergence speed, and produce suboptimal solutions in a Gaussian noise environment. To avert these difficulties, we estimate the design parameters of the CSAF architecture using four independent MOAs: differential evolution (DE), brainstorm optimisation (BSO), multi-verse optimiser (MVO), and a recently proposed remora optimisation algorithm (ROA). In ROA, the remora factor’s control parameters produce near-global optimal parameters with a higher convergence speed. ROA also ensures the most balanced exploration and exploitation phases compared to DE-, BSO-, and MVO-based design approaches. Finally, the identification results of three numerical and industry-specific benchmark systems, including coupled electric drives, a thermic wall, and a continuous stirred tank reactor, are presented to emphasise the effectiveness of the ROA-based CSAF design.

关键词： Cascaded spline adaptive filter Nonlinear system identification Remora optimisation algorithm

Optimal array factor radiation pattern synthesis for linear antenna array using cat swarm optimization： validation by an electromagnetic simulator

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Frontiers of Information Technology & Electronic Engineering 2017年第4期18卷 570-577页

作者： Gopi RAM Durbadal MANDAL Sakti Prasad GHOSHAL rajib kar Department of Electronics and Communication Engineering National Institute of Technology Durgapur 713209 India Department of Electrical Engineering National Institute of Technology Durgapur 713209 India

In this paper, an optimal design of linear antenna arrays having microstrip patch antenna elements has been carried out Cat swarm optimization （CSO） has been applied for the optimization of the control parameters of radiation pattern of an antenna array. The optimal radiation patterns of isotropic antenna elements are obtained by optimizing the current excitation weight of each element and the inter-element spacing. The antenna arrays of 12, 16, and 20 elements are taken as examples. The arrays are designed by using MATLAB computation and are validated through Computer Simulation Technology-Microwave Studio （CST-MWS）. From the simulation results it is evident that CSO is able to yield the optimal design of linear antenna arrays of patch antenna elements.

关键词： Patch antenna Linear antenna array Cat swarm optimization (CSO) Side lobe level (SLL)

New experimental constraints: implications for pe-trogenesis of charnockite of dioritic composition

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Natural Science 2010年第10期2卷 1085-1089页

作者： rajib kar Samarendra Bhattacharya Indian Statistical Institute Kolkata India

Hornblende-dehydration melting experiments at high temperatures (> 950oC) indicate change of melt composition from tonalite/granodiorite to quartz-diorite;clinopyroxene instead of hornbl- ende as the residual phase and change in melting reaction from peritectic hornblende-dehydr- ation to eutectic clinopyroxene-orthopyroxene- plagioclase. In the light of these experimental results, petrogenesis of a charnockite pluton of homogeneous dioritic composition in the Eastern Ghats Belt, India, can be explained as melting at high-temperatures (> 950oC). Negative Sr and Eu anomalies further indicate plagioclase as a major residual phase, consistent with melt- ing at high-temperatures (> 950oC).

关键词： Dioritic charnockite Residual clinopyroxene Residual plagioclase Eutectic melting

Relative Chronology in High-Grade Crystalline Terrain of the Eastern Ghats, India: New Insights

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International Journal of Geosciences 2011年第4期2卷 398-405页

作者： Samarendra Bhattacharya rajib kar Amit Kumar Saw Prasanta Das 不详

The two major lithology or gneiss components in the polycyclic granulite terrain of the Eastern Ghats, India, are the supracrustal rocks, commonly described as khondalites, and the charnockite-gneiss. Northern Eastern Ghats belt, north of the Godavari rift has been defined as the Eastern Ghats Province, while that to the south has been defined as the Ongole domain;and although, these distinct crustal domains also record different ages of granulite metamorphism, both of these domains are dominated by the two lithologies. Many of the workers considered the khondalites as the oldest component with unknown basement and the charnockite- protoliths as intrusive into the khondalites. However, published geochronological data do not corroborate the aforesaid relations. Onset of khondalite sedimentation in the Proterozoic Eastern Ghats Province, constrained by detrital zircon data, as around 1.3 Ga and the charnockite-protolith emplacement between 1.9 and 2.9 Ga, argue against intrusion of felsic magma (tonalite, now enderbite!) in to the khondalites. The field relations of the hornblende-mafic granulite with the two gneiss components together with Sm-Nd isotopic data of the hornblende-mafic granulites (both the xenoliths within charnockites and those interbanded with the khondalites) indicate that khondalite sediments were deposited on older mafic crustal rocks. Mafic basement and supracrustal rocks were subsequently deformed and metamorphosed together during collisional orogeny at high to ultra-high temperatures – partial melting of mafic rocks producing the charnockitic melt;and partial melting of pelitic sediments producing the peraluminous granitoids. This is compatible with all the geochronological data as well as the petrogenetic model of partial melting for the charnockitic rocks in the Eastern Ghats Belt. The Ongole domain, south of the Godavari rift, though, is distinct in terms of the age of first/ earliest UHT metamorphism, but here too the charnockite-protoliths

关键词： Hornblende-Mafic Granulite Xenolith Interbanded Mafic Basement Partial Melting.

Geochronological Constraints for Boundary Shear Zones between Eastern Ghats Province and Bastar Craton: Implication for the Formation of Granulites and Their Exhumation History

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International Journal of Geosciences 2022年第8期13卷 593-608页

作者： rajib kar Miguel Angelo Stipp Basei Samarendra Bhattacharya Anwesha Ghosh Sanchari Chatterjee Department of Geology University of Calcutta Kolkata India Geoscience Institute Sao Paulo University Sao Paulo Brazil

Shear zones in the boundary between Eastern Ghats Province (EGP) and the cratons of Singhbhum in the north and Bastar in the west provide an excellent opportunity to study the tectonics of shear zone development and its timing in relation to the evolutionary history of the granulite suites. Detailed structural, microfabric and quartz C-axis patterns revealed a high temperature shear zone, at the western boundary between EGP and Bastar Craton (BC) around Paikmal. Petrological studies in this shear zone indicated decompression coeval with stretching in the sheared granulites. Geochronological constraints provided here indicate rapid exhumation of deep seated granulites in this boundary shear zone;the timing also is late in relation to the long-lived thermal (granulite formation) event in the EGP. Additionally, our geochronological data demonstrated the ~1600 Ma event in the Eastern Ghats Belt (EGB) involving sedimentation, magmatism, metamorphism and crustal anatexis, as a significant world event.

关键词： Shear Zone Extrusion Tectonics Exhumation Eastern Ghats Province Geochronology

基于䲟鱼优化算法提升级联样条自适应滤波器的建模精度及其在实时系统中的应用（英文）

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Frontiers of Information Technology & Electronic Engineering 2024年第11期 1515-1536页

作者： Lakshminarayana JANJANAM Suman Kumar SAHA rajib kar 萨西技术与工程学院电子与通信工程系JNTUK认证研究中心拉普尔国立理工学院电子与通信工程系杜尔加普尔国立理工学院电子与通信工程系

介绍了一种新的优化级联样条自适应滤波器（CSAF）方法，通过使用元启发式优化算法（MOA）识别未知的非线性系统。CSAF架构结合了汉默斯坦和维纳系统，其中非线性块通过样条网络实现。所用算法通过适当加权的成本函数优化样条插值函数... 详细信息

介绍了一种新的优化级联样条自适应滤波器（CSAF）方法，通过使用元启发式优化算法（MOA）识别未知的非线性系统。CSAF架构结合了汉默斯坦和维纳系统，其中非线性块通过样条网络实现。所用算法通过适当加权的成本函数优化样条插值函数和线性滤波器的权重，从而提高滤波器的稳定性、稳态性以及全局最优解的收敛性。本文研究了两种CSAF架构：汉默斯坦–维纳样条自适应滤波器（HW-SAF）和维纳–汉默斯坦样条自适应滤波器（WH-SAF）结构。这两种架构是基于梯度方法设计的，其收敛速度慢，效率低，且在高斯噪声环境下会产生次优解。为克服以上困难，本文采用4种独立的MOA以估计CSAF架构的设计参数：差分进化（DE）、头脑风暴优化（BSO）、多元宇宙优化器（MVO）以及最近提出的䲟鱼优化算法（ROA）。在ROA中，䲟鱼因子的控制参数能以更高的收敛速度产生接近全局最优的参数。与基于DE、BSO和MVO的方法相比，ROA确保了探索和开发阶段的平衡。最后，3个数值和特定行业基准系统（即耦合电驱动、热壁和连续搅拌槽反应器）的识别结果表明了基于䲟鱼优化算法CSAF的有效性。

关键词：级联样条自适应滤波器非线性系统辨识䲟鱼优化算法

Assessment of the fraction of bed load concentration towards the sediment transport of a monsoon-dominated river basin of Eastern India

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Journal of Geographical Sciences 2023年第5期33卷 1023-1054页

作者： kar Rohan SARkar Arindam School of Infrastructure Indian Institute of Technology BhubaneswarArgulKhordhaOdisha 752050India

Given the challenges of re-creating complex bed load(BL)transport processes in rivers,models are preferred over gathering and examining field *** highlight of the present research is to develop an approach to determine the ungauged bed load concentration(BLC_(u))utilizing the measured suspended sediment concentration(SSC)and hydraulic variables of the last four decades for the Mahanadi River *** technique employs shear stress and SSC equations for turbulent open channel ***,the predicted BLC_(u)is correlated with SSC using a power relation to estimate BLC_(u)on the river and ***,different BL functions(BLF)efficiency is assessed across *** model predicted BLC_(u)is comparable with the published data for sandy rivers and falls within±20%.Outliers in hydraulic and sedimentological statistics significantly influence estimating the BL fraction apart from higher relative ratios and catchment *** constants of power functions are physically linked to sediment transport configuration,mechanism,and inflow to the *** stream power-based BLF best predicts the BL transport,followed by shear stress and unit discharge *** disparity in the estimation of BLC_(u)results from station-specific physical factors,sampling data dispersion,and associated uncertainties.

关键词： Mahanadi River Basin ungauged bed load concentration suspended sediment concentration correlations bed load functions

Liposomal dual delivery systems in visceral leishmaniasis enhance the synergistic effects of combination therapy:A promise for the future

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Asian Pacific Journal of Tropical Medicine 2024年第2期17卷 47-60页

作者： Raghunath Hazra Amrita kar Santanu kar Mahapatra Department of Paramedical and Allied Health Sciences Biodiversity and Environmental Studies Research CentreMidnapore City CollegeKuturiyaBhadutalaPaschim Medinipur-721129West BengalIndia

Visceral leishmaniasis(VL)is a neglected tropical disease,and this review has summarized the current treatment scenario and its *** also highlights alternative approaches used by research groups in India and around the world to develop cutting-edge and potent anti-leishmanial *** though numerous medications could be utilized to treat VL,the limitations of current treatments including their toxicity,cost,route of administration,and duration of doses,have contributed to the emergence of *** therapy might be a better option due to its shorter duration,easier route of administration,and ability to extend the lifespan of individual ***,there is a risk of not delivering both the drugs to the target site together,which can be overcome by the liposomal entrapment of those drugs and at a time knock an opportunity to reduce the dosage of amphotericin B if the combination drug provides a synergistic effect with ***,this review presents a novel strategy to fight against VL by introducing dual drug-loaded liposomes.

关键词： Visceral leishmaniasis Liposomal anti-leishmanial drug Dual drug liposome

On U-orthodox semigroups

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Science China Mathematics 2009年第2期52卷 329-350页

作者： SHUM kar Ping Department of Mathematics The University of Hong Kong

As a generalization of an orthodox semigroup in the class of regular semigroups, a type W semigroup was first investigated by El-Qallali and Fountain. As an analogy of the type W semigroups in the class of abundant semigroups, we introduce the U-orthodox semigroups. It is shown that the maximum congruence μ contained in on U-orthodox semigroups can be determined. As a consequence, we show that a U-orthodox semigroup S can be expressed by the spined product of a Hall semigroup W U and a V-ample semigroup (T,V). This theorem not only generalizes a known result of Hall-Yamada for orthodox semigroups but also generalizes another known result of El-Qallali and Fountain for type W semigroups.

关键词： orthodox semigroups type W semigroups U-orthodox semigroups U-ample semigroups spined products 20M10