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Bus Encoded LUT Multiplier for Portable Biomedical Therapeutic Devices

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Computers, Materials & Continua 2017年第1期53卷 37-47页

作者： r.praveena S.Nirmala Sengunthar college of Engineering Muthayammal Engineering College

DSP operation in a Biomedical related therapeutic hardware need to beperformed with high accuracy and with high speed. Portable DSP hardware’s likepulse/heart beat detectors must perform with reduced operational power due to lack ofconventional power sources. This work proposes a hybrid biomedical hardware chip inwhich the speed and power utilization factors are greatly improved. Multipliers are thecore operational unit of any DSP SoC. This work proposes a LUT based unsignedmultiplication which is proven to be efficient in terms of high operating speed. For n bitinput multiplication n*n memory array of 2 n bit size is required to memorize all thepossible input and output combination. Various literature works claims to be achieve highspeed multiplication with reduced LUT size by integrating a barrel shifter *** paper work address this problem, by reworking the multiplier architecture with aparallel operating pre-processing unit which used to change the multiplier and multiplicandorder with respect to the number of computational addition and subtraction stages *** with LUT multiplier a low power bus encoding scheme is integrated to limit the powerconstraint of the on chip DSP unit. This paper address both the speed and power optimizationtechniques and tested with various FPGA device families.

关键词： Constant coefficient multipliers reduced coefficient multipliers bus encoding DSP SoC look up table barrel shifter pre-processing

routing Protocol in Underwater Wireless Acoustic Communication Using Non Orthogonal Multiple Access

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Journal on Internet of Things 2021年第4期3卷 139-147页

作者： J.V.Anand r.praveena T.r.Ganesh Babu PACE Institute of Technology and Sciences OngoleAndhra Pradesh523272India Muthayammal Engineering College NamakkalTamilnadu637408India

The underwater wireless communication with the complexity of attenuation and low propagation speed makes resource constraints in networking sensor nodes and *** Sensor Transmission with Attenuation Calculation using Non Orthogonal Multiple Access(UWSTAC-NOMA)protocol has been *** protocol calculates channel gain along with attenuation in underwater channels and provides internetworking sensor for rate allocation minimizing *** Interference Cancellation has been used at the receiving sensor to decode the information *** network level performance of sensors and increasing the data rate improves the overall ***,connecting several sensors to sink based on its depth region of deployment has been achieved using Underwater Sensor Transmission with Attenuation Calculation using Non Orthogonal Multiple Access(UWSTAC-NOMA).The analytical background of attenuation never confuted the simulation results of the proposed protocol in NS2 *** results shows that the throughput,average bit error rate and residual energy of sink performance.

关键词： Underwater sensor and sink networking absorption loss transmission loss channel gain resource allocation interference mitigation Non Orthogonal Multiple Access

Dechlorination of chlorophenols by zero valent iron impregnated silica

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Journal of Environmental Sciences 2012年第4期24卷 765-773页

作者： praveena Juliya Dorathiy Palanivelu Kandasamy Centre for Environmental Studies Anna UniversityChennai 600025India

Laboratory studies were conducted to find out the efficacy of uniquely prepared zero valent iron impregnated silica in transforming xenobiotic chlorophenols namely 4-chlorophenol, 2,4-dichlorophenol and 2,4,6-trichlorophenol. Continuous mode column experiments were performed to investigate the transformation of chlorophenols by varying pH, column height, flow rate and initial chlorophenol concentration. reusability study of the zero valent iron impregnated silica was studied as well as the morphological changes and the chemical composition of the catalyst medium were also investigated. Dechlorination kinetic studies were conducted and the order of dechlorination of chlorophenols was found to be 2,4,6-trichlorophenol 〉 2,4-dichlorophenol 〉 4-chlorophenol. The optimum pH, column height and flow rate were found to be 7, 20 cm and 0.75 L/hr respectively for all chlorophenols in the reaction duration of 4 hr. Intermediates formed during dechlorination study were identified by gas chromatography-mass spectroscopy analysis. This method was applied to real pulp and paper wastewater and was found satisfactory.

关键词： zero valent iron silica chlorophenols dechlorination

Structural and Interaction Properties of Porphyrin Layers — A Quantum Chemical Study

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Communications in Theoretical Physics 2015年第5期63卷 625-634页

作者： G.praveena A.Abiram Department of Physics PSGR Krishnammal College for Women Department of Physics Karunya University

This paper is proposed to understand the interaction of porphyrin layers with diatomic molecules interacting at their interior regions by applying ab initio and density functional theory （DFT） methods. We have used NO, GO, and O2 diatomic molecules to interact with the porphyrin layers. The most common Fe-centered metalloporphyrin structure with tetra-pyrrlic rings having N4 core is chosen for the study. The optimization of Porphyrin-Porphyrin （PI-PII） and Porphyrin-Diatomic molecule-Porphyrin （P1-AB-P11）（AB = NO, CO, and 02） complexes are performed using HF method. In order to understand the planarity and appropriate stacking size of porphyrins and also to infer the separation of diatomic molecules between porphyrin layers the behavior of PI-AB-PH complexes （where AB = NO, CO, and 02） are analyzed using structural properties and molecular electrostatic potentials （MEP）. The MEPs are caiculated using hybrid exchange correlation functional B3PW91 of DFT Mong with 6-31＋G basis set for the PI-PH and PI-AB-Pzz complexes obtained from HF method.

关键词： porphyrin ab initio density functional theory diatomic molecules molecular storage

Cervical Diseases Prediction Using LHVr Techniques

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Computer Systems Science & Engineering 2021年第3期36卷 477-484页

作者： praveena rajasekaran Preetha Jaganathan Anjali Annadurai Muthayammal Engineering College KakaveriRasipuram637408India

The stabilizing mechanisms of cervical spine spondylosis are involved in the degenerating segmentation vertebra,which often causes *** of the individual is affected,both physically and *** to depression,nervous-ness,and psychological damages occur thereby losing their human activity *** nucleus pulposus of spinal disc herniation is prolapsed through a deﬁciency of annulusﬁbrosus.A jelly-like core part of the disc contains proteins that cause the tissues to become swollen when it touches the nucleus *** proposed Gradient Linear Classiﬁcation(GLC)algorithm is used for the efﬁ-cient automatic classiﬁcation of disc degeneration herniation of Inter vertebral/vertebra in a cervical *** between the disc degeneration is classiﬁed through gradient operator and is estimated using the rotation of angles between the *** of the orthopedic spine are searching for high-preci-sion algorithms,which are achieved using proposed Linear Hybrid Vertebra regression(LHVr)diagnostic techniques to identify the degree of cervical disc degeneration using an accurate *** experimental results have been used to determine a high range of classiﬁcation in predicting the spinal cord which saves handling time and accomplishes high accuracy in detection.

关键词： Cervical diseases GLC LHVr disc prediction classify disc degeneration

Static strength analysis of dragonfly inspired wings for biomimetic micro aerial vehicles

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Chinese Journal of Aeronautics 2016年第2期29卷 411-423页

作者： praveena Nair Sivasankaran Thomas Arthur Ward rubentheren Viyapuri Mohd rafie Johan Department of Mechanical Engineering University of Malaya

This article examines the suitability of fabricating artificial, dragonfly-like, wing frames from materials that are commonly used in unmanned aircraft （balsa wood, black graphite carbon fiber and red prepreg fiberglass）. Wing frames made with Type 321 stainless steel are also examined for comparison. The purpose of these wings is for future use in biomimetic micro aerial vehicles （BMAV）. BMAV are a new class of unmanned micro-sized aerial vehicles that mimic flying biolog- ical organisms （like flying insects）. Insects, such as dragonflies, possess corrugated and complex vein structures that are difficult to mimic. Simplified dragonfly-like wing frames were fabricated from these materials and then a nano-composite film was adhered to them, which mimics the membrane of an actual dragonfly. Finite element analysis simulations were also performed and compared to experimental results. The results showed good agreement （less than 10% difference for all cases）. Analysis of these results shows that stainless steel is a poor choice for this wing configuration, pri- marily because of the aggressive oxidation observed. Steel, as well as balsa wood, also lacks flexi- bility. In comparison, black graphite carbon fiber and red prepreg fiberglass offer some structural advantages, making them more suitable for consideration in future BMAV applications.

关键词： Biomimetic micro aerialvehicle Carbon fiber Finite element analysis Glass fiber Wing membrane Wing structure

Machine Learning Techniques in Predicting Hot Deformation Behavior of Metallic Materials

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 713-732页

作者： Petr Opela Josef Walek Jaromír Kopecek Department of Metallurgical Technologies Faculty of Materials Science and TechnologyVSB–Technical University of OstravaOstrava70800Czech Republic FZU—Institute of Physics of the Czech Academy of Sciences Prague18200Czech Republic

In engineering practice,it is often necessary to determine functional relationships between dependent and independent *** relationships can be highly nonlinear,and classical regression approaches cannot always provide sufficiently reliable ***,Machine Learning(ML)techniques,which offer advanced regression tools to address complicated engineering issues,have been developed and widely *** study investigates the selected ML techniques to evaluate their suitability for application in the hot deformation behavior of metallic *** ML-based regression methods of Artificial Neural Networks(ANNs),Support Vector Machine(SVM),Decision Tree regression(DTr),and Gaussian Process regression(GPr)are applied to mathematically describe hot flow stress curve datasets acquired experimentally for a medium-carbon *** the GPr method has not been used for such a regression task before,the results showed that its performance is the most favorable and practically unrivaled;neither the ANN method nor the other studied ML techniques provide such precise results of the solved regression analysis.

关键词： Machine learning Gaussian process regression artificial neural networks support vector machine hot deformation behavior

Emerging potential of progranulin-dependent SorCS2 signaling in healthy and diseased nervous systems

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Neural regeneration research 2025年第9期20卷 2591-2593页

作者： Alena Salasova Anders Nykjær Danish research Institute of Translational Neuroscience DANDrITE-Nordic EMBL Partnership for Molecular Medicine and Centre of Excellence PROMEMODepartment of BiomedicineAarhus UniversityAarhusDenmark

The formation of the mammalian nervous system and its maturation into sensory,motor,cognitive,and behavioral circuits is a complex process that begins during early embryogenesis and lasts until young *** neurodevelopm... 详细信息

关键词： progr jointly CS2

Saturation states of carbonate minerals in a freshwater-seawater mixing zone of small tropical island’s aquifer

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Chinese Journal Of Geochemistry 2010年第3期29卷 278-286页

作者： Ahmad Zaharin Aris Sarva Mangala praveena Mohd Harun Abdullah Department of Environmental Sciences Faculty of Environmental StudiesUniversiti Putra Malaysia Environmental Science Programme School of Science and TechnologyUniversiti Malaysia Sabah

Groundwater is a crucial resource on the Manukan Island as it is the only source of freshwater available on the island. The aquifer has deteriorated to a high degree, during the last decade. Nine domestic wells were sampled from March 2006 to January 2007 to probe the hydrochemical components that influence the water quality. Geochemical data on dissolved major constituents in groundwater samples from the Manukan Island revealed the main processes responsible for their geochemical evolution. The results using statistical analyses, graphical method and numerical model output (PHrEEQC) showed that the groundwater was chemically highly enriched in Na and Cl, indicative of seawater intrusion into the aquifer as also supported from the Na-Cl signature on the Piper diagram. From the PHrEEQC simulation model, calcite, dolomite and aragonite solubility showed positive values of the saturation indices (SI), indicating supersaturation which led to mineral precipitation condition of water by these minerals.

关键词：海水入侵含水层碳酸盐矿物淡水饱和态混合区水化学成分水地球化学