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Frameworks of non-Orthogonal Multiple Access Techniques in Cognitive Radio Communication systems

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China Communications 2019年第6期16卷 129-149页

作者： Prabhat Thakur Alok Kumar s Pandit g singh s n satashia Department of Electronics and Communication Engineering Jaypee University of Information TechnologyWaknaghat-173215India Department of Electrical and Electronics Engineering Auckland Park Kingsway Campus University of JohannesburgPO Box 524Johannesburg-2006S Africa space Application Centre Indian Space Research OrganizationAhmedabad-380015India

Recently,the increasing demand of radio spectrum for the next generation communication systems due to the explosive growth of applications appetite for bandwidths has led to the problem of spectrum *** potential approaches among the proposed solutions to resolve this issue are well explored cognitive radio(CR)technology and recently introduced non-orthogonal multiple access(nOMA)*** the techniques are employed for efficient spectrum utilization and assure the significant improvement in the spectral ***,the significant improvement in spectral efficiency can be achieved by combining both the *** the CR is well-explored technique as compared to that of the nOMA in the field of communication,therefore it is worth and wise to implement this technique over the *** this article,we have presented the frameworks of nOMA implementation over CR as well as the feasibility of proposed ***,the differences between proposed CR-nOMA and conventional CR frameworks are ***,the potential issues regarding the implementation of CR-nOMA are explored.

关键词： cognitive radio channel state information non-orthogonal multiple access power division multiple access superposition-coding successive-interference-cancellation

Response of testicular antioxidant enzymes to hexachlorocy clohexane is species specific

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Asian Journal of Andrology 2002年第3期4卷 191-194页

作者： Luna samanta g.b.n. Chainy biochemistry Unit & ICAbPs Department of Zoology Utkal University Bhubaneswar-751004 IndiaBiochemistry Unit & ICABPS Department of Zoology Utkal University Bhubaneswar-751004 India

Aim: To find out whether the response of testicular oxidative stress parameters to hexachlorocyclohexane (HCH) is species specific. Methods: In rats and mice (n=5 in each group), HCH was administered at a dose of 20 mg/kg/day intraperitoneally for 30 days in 0.1 ml of refined groundnut oil. The control groups received equal volume of the vehicle. Animals were sacrificed 24 hours after the last injection and various oxidative stress parameters were measured immediately. Results: The level of both endogenous as well as FesO_4 and ascorbic acid-stimulated lipid peroxidation was increased significantly in the HCH-treated rats, whereas the pattern was just the reverse in case of mice. Although the level of H_2O_2 content increased in response to HCH in both groups, a totally different trend was observed for the activity of the principal H_2O_2-metabolising enzyme, catalase. In case of rats, a significant decline in the activity of catalase was recorded in response to HCH whereas a sharp augmentation in the enzyme activity was noticed in mice. similarly, the decreased activity of superoxide dismutase observed in rats remained unaltered in mice. Conclusion: HCH induces oxidative stress in the testis of both rats and mice. However, the pattern of response of testicular oxidative stress parameters seems to be species specific.

关键词： hexachlorocyclohexane rat testes lipid peroxidation antioxidant defence

Idiosyncratic behaviour of(na_(0.49)5K_(0.455)Li_(0.05))(nb_(0.95)Ta_(0.05))O_3-La_2O_3 ceramics: synergistically improved thermal stability, ageing, and fatigue properties

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Journal of Advanced Ceramics 2019年第1期8卷 79-89页

作者： bhupender RAWAL n. n. WATHORE b.PRAVEEnKUMAR H. s. PAnDA Armament Research and Development Establishment Department of Materials Engineering Defence Institute of Advanced Technology

La_2 O_3 doped(na0.495 K0.455 Li0.05)(nb0.95 Ta0.05)O_3 ceramics are prepared using modified milling process, and the influences of La2 O3 on ferroelectric behaviour, ageing characteristics, thermal stability, electrical stability, crystal structure, microstructure, dielectric and piezoelectric properties were reported. La_2 O_3 addition improved the ferroelectric characteristic substantially, and obtained remnant polarization(Pr) and maximum strain(smax) around 34.3 C/cm^2 and 0.13% ***_2 O_3 doped ceramics improved the thermal stability and were stable up to 180 ℃ compared to undoped ceramics(120 ℃). The Rietveld refinement along with the high-temperature X-ray diffraction studies suggested the presence of monoclinic phase in La doped compositions, which is responsible for their idiosyncratic behaviour. The maximum values were obtained around 179 pC/n and 0.385 for piezoelectric constant(d33) and electromechanical coupling factor(kp) respectively in La_2 O_3 doped samples(0.02 wt%), which also exhibited the lowest ageing rate and stable electrical fatigue behaviour.

关键词： dielectric fatigue piezoelectric thermal stability

Effect of sodium Metasilicate on structural, Optical, Dielectric and Mechanical Properties of ADP Crystal

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Journal of Materials science & Technology 2016年第1期32卷 62-67页

作者： Mohd Anis M.D. shirsat s.s. Hussaini b.Joshi g.g. Muley Department of Physics Sant Gadge Baba Amravati University Amravati 444602 Maharashtra India Crystal growth Laboratory Department of Physics MiUiya Arts Science and Management Science College Beed 431122 Maharashtra India Intelligent Materials Research Laboratory Department of Physics Dr. Babasaheb Ambedkar Marathwada University Aurangabad 431005 Maharashtra India science and Engineering Research board New Delhi 110016 India

For the first time, sodium metasilicate （sMs） doped ammonium dihydrogen phosphate （ADP） crystal was grown by slow evaporation solution technique. The unit cell parameters of grown crystal were deter- mined by means of single crystal X-ray diffraction technique. The qualitative analysis of sMs doped ADP crystal was carried out using energy dispersive X-ray and Fourier transform infrared analysis. The in- crease in optical transparency of doped ADP crystal was ascertained in the range of 200-900 nm using the UV-visible spectral analysis. The vital optical constants were evaluated using the transmittance data to explore various optical device applications of crystal. The assertive influence of sMs on mechanical and dielectric behavior of ADP crystal was investigated by means of Vickers microhardness analysis and dielectric studies, respectively. The enhancement in second harmonic generation （sHg） efficiency of sMs doped ADP crystal with reference to potassium dihydrogen phosphate （KDP） and ADP was confirmed from Kurtz-Perry sHg test. The Kerr lensing nonlinearity in sMs doped ADP crystal was identified by means of Z-scan analysis and the third order nonlinear optical susceptibility （χ3） was found to be 6.19 × 10-5 esu, which vitalizes its application for laser stabilization systems.

关键词： Crystal growth nonlinear optical materials Dielectric properties Optical properties

Modelling of sediment movement in the surf and swash zones

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Acta Oceanologica sinica 2015年第2期34卷 137-142页

作者： TOKPOHOZIn n.b. KOUnOUHEWA b. AVOssEVOU g.Y.H. HOUEKPOHEHAM A. AWAnOU C.n. Institut de Mathématiques et de sciences Physiques (IMsP/UAC) Centre béninois de la Recherche scientifique et Technique (CbRsT) Laboratoire de Physique du Rayonnement (LPR/FAsT-UAC)

Under the action of marine currents,non-cohesive sediments evolve by bed-load,by saltation or suspension depending on their *** authors have considered that the movement of sediment is bidimensional and modelized the effects of swell by a constant velocitynear the *** we have studied the velocity profile of fluctuating currents near the seabed and studied the movement of sediment in *** results show that in the areas of study（surf and swash）the movement of sediment occurs in a volume,and the evolution of sediment varies from an areato *** obtained theoretical profiles of the position and velocity vectors confirm the observations of several authors.

关键词： non-cohesive sediments sediment dynamics swell trajectory of sediment velocity drive

Deep Residual network based on Image Priors for single Image super Resolution in FFA Images

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Computer Modeling in Engineering & sciences 2020年第10期125卷 125-143页

作者： g.R.Hemalakshmi D.santhi V.R.s.Mani A.geetha n.b.Prakash national Engineering College Kovilpatti628503India

Diabetic retinopathy,aged macular degeneration,glaucoma *** widely prevalent ocular pathologies which are irreversible at advanced *** learning based automated detection of these pathologies facilitate timely clinical interventions,preventing adverse *** screen these pathologies with fundus Fluorescein Angiography Images(FFA)which capture retinal components featuring diverse morphologies such as retinal vasculature,macula,optical disk ***,these images have low resolutions,hindering the accurate detection of ocular *** of high resolution images from these images,by super resolution approaches expedites the diagnosis of pathologies with better *** paper presents a deep learning network for single Image super Resolution(sIsR)of fundus fluorescein angiography images,modeled on residual learning,gridded interpolation and swish activation *** image prior for this network is constructed by gridded interpolation which provides better image fidelity compared to other *** of the performance of this network and comparative analysis with benchmark architectures,on a standard dataset shows that the proposed network is superior with respect to performance metrics and computational time.

关键词： sIsR FFA residual network gridded interpolation swish function

novel Approach to Minimize the Memory Requirements of Frequent subgraph Mining Techniques

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Chinese Journal of Electronics 2021年第2期30卷 258-267页

作者： b?Lg?n Turgay Tugay O?UZ Murat Department of Computer Engineering Bursa Technical University Microsoft Corporation Turkey branch

Frequent subgraph mining(FsM) is a subset of the graph mining domain that is extensively used for graph classification and clustering. Over the past decade, many efficient FsM algorithms have been developed with improvements generally focused on reducing the time complexity by changing the algorithm structure or using parallel programming techniques. FsM algorithms also require high memory consumption, which is another problem that should be solved. In this paper, we propose a new approach called Predictive dynamic sized structure packing(PDssP) to minimize the memory needs of FsM algorithms. Our approach redesigns the internal data structures of FsM algorithms without making algorithmic modifications. PDssP offers two contributions. The first is the Dynamic sized Integer Type, a newly designed unsigned integer data type, and the second is a data structure packing technique to change the behavior of the compiler. We examined the effectiveness and efficiency of the PDssP approach by experimentally embedding it into two state-of-the-art algorithms, g span and *** compared our implementations to the performance of the originals. nearly all results show that our proposed implementation consumes less memory at each support level, suggesting that PDssP extensions could save memory, with peak memory usage decreasing up to 38% depending on the dataset.

关键词： data structures algorithmic modifications high memory consumption graph mining domain Dynamic sized Integer Type Predictive dynamic sized structure packing internal data structures graph classification parallel programming peak memory usage memory requirements PDssP extensions finite state machines graph theory PDssP approach algorithm structure newly designed unsigned integer data type data mining data structure packing technique efficient FsM algorithms clustering frequent subgraph mining techniques

Total teleportation of zero-and one-photon entangled states in running waves

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Chinese Physics b 2008年第1期17卷 60-63页

作者： W.b.Cardoso A.T.Avelar b.baseia n.g.de Almeida Instituto de Física Universidade Federal de Goiás 74.001-970 Goinia (GO) Brazil nuícleo de Pesquisas em Física Universidade Catlica de Goiás 74.605-220 Goinia (GO) Brazil

Inspired by a recent paper [2002 J. Opt. b 4 316] we present an alternative scheme to teleport an entanglement of zero- and one-photon states of a running-wave field. The scheme employs only linear optical elements pl... 详细信息

关键词： total teleportation entangled states linear optical elements

Hierarchical structure and deformation behavior of a novel multicomponent β titanium alloy with ultrahigh strength

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Journal of Materials science & Technology 2022年第12期107卷 227-242页

作者： X.Li X.n.Wang K.Liu g.H.Cao M.b.Li Z.s.Zhu s.J.Wu school of Materials science and Engineering Beihang UniversityBeijing 100191China Titanium Alloys Laboratory Beijing Institute of Aeronautical MaterialBeijing 100095China school of Materials science and Engineering Shanghai UniversityShanghai 200444China

based on the general [Mo] equivalent criterion and d-electron orbital theory, a new ultrahigh-strength βtitanium alloy with eight major elements(Ti-4.5Al-6.5Mo-2Cr-2.6nb-2Zr-2sn-1V, Tb17) for industrial applications was developed. An ingot of five tons was successfully melted by thrice vacuum consumable arc melting. The microstructure and elements partitioning of different conditions were investigated systematically. The results suggest that the hierarchical structures of micro-scale first α phase(αf), nano-scale secondary α phase(αs), and ultrafine FCC substructures can be tailored by solution plus aging(sTA) heat treatment. The lateral and epitaxial growth of αfphase promotes the HCP-α to FCC substructure transformation with the help of elements partitioning during the aging process. Moreover, the element V, generally regarded as β stabilizer, is found to mainly concentrate in the Al-rich αfphase in this study probably due to its relatively lower content and the strong bonding energy of Al-V. The hierarchical structure has a strong interaction with dislocations, which contributes to achieve a superhigh strength of 1376 *** addition, the plastic strain is partitioned in the multi-scale precipitates(such as the α and FCC substructures) and β matrix, resulting in a considerable plasticity. TEM observation demonstrates that high density entangled dislocations at interfaces and mechanical twins exist in the sTA sample after tensile test. It can be deduced that both dislocation slipping and twinning mechanisms are present in this ***, Tb17 alloy can serve as an excellent candidate for structural materials on aircrafts that require high strength and lightweight.

关键词： Titanium alloy Hierarchical structure Deformation behavior Ultrahigh strength Elements partitioning