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Clean Energy 2021年第4期5卷 655-672页

作者： B.m.Kiran Kumar m.S.Indira S.Nagaraja Rao m S Ramaiah University of Applied Sciences Department of Electrical EngineeringBangaloreIndia-560058

This paper analyses the performance of a multiple gain boost converter(mGBC)connected to a solar photovoltaic(SPV)system with a grid-tied *** capacitor inductor capacitor(CLC)-based mGBC is integrated to lift the output voltage of the SPV to the required *** voltage lifts/levels in a boost converter(BC)are based on the number of CLC *** suggested mGBC is compared with various conventional BCs in terms of boost factor and component count.A hybrid fuzzy logic-perturb&observe maximum power point tracker(HFL-P&O mPPT)developed is used to monitor P_(max)(maximum power)generated by the ***,a comparative analysis of the suggested mPPT with a conventional P&O and fuzzy logic-based(FLB)mPPT for a CLC-based mGBC is *** comparison is made in terms of rise time,voltage ripples(%),steady-state time and boost *** output characteristics of the developed model for different irradiation conditions are analysed using the mATLAB/Simulink *** mPPT simulation result exhibits minimum oscillations at mPP and a significantly better rise time of 0.015 s when compared with a conventional mPPT and FLB *** proposed CLC-mGBC gives an appreciable boost factor of *** generated SPV power is supplied to the grid through a conventional inverter and synchronized using a phase-locked loop *** total harmonic distortion of 1.66%obtained in the output current of the inverter is within the permissible range of the IEEE standards.

关键词： CLC-mGBC FLB mPPT Grid-tie inverter SPV THD

Coping with handover effects in video streaming over cellular networks

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第Z1期7卷 137-144页

作者： BOUAZIZI Imed haNNUKSELA miska m RAUF Usama Nokia Research Center Tampere 33720 Finland

The 3rd generation partnership project (3GPP) has defined the protocols and codecs for implementing media streaming services over packet-switched 3G mobile networks. The specification is based on IETF RFCs on audio/video *** also adds new features to achieve better adaptation to the mobile network environment. In this paper, we propose an algorithm for handover detection and fast buffer refill that is based on the existing feedback and signaling mechanisms. The proposed algorithm refills the receiver buffer at a faster pace during a limited time frame after a hard handover is detected in order to achieve higher video quality.

关键词： Video streaming, 3GPP packet-switched streaming service, handover detection, hard handover, Fast buffer refill,mobile networks

New sub-equation method to construct solitons and other solutions for perturbed nonlinear Schrödinger equation with Kerr law nonlinearity in optical fiber materials

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Journal of Ocean Engineering and Science 2019年第1期4卷 14-23页

作者： Elsayed m.E.Zayed Abdul-Ghani Al-Nowehy Reham m.A.Shohib Department of mathematics Faculty of ScienceZagazig UniversityZagazigEgypt Department of mathematics Faculty of Education and ScienceTaiz UniversityTaizYemen

In a previous work,Zayed and Al-Nowehy have applied the Riccati equation mapping method combined with the generalized extended(G/G)-expansion method and found new exact solutions of the nonlinear KPP *** the present article,we propose a different method,namely,a new sub-equation method consists of the Riccati equation mapping method and the(G/G,1/G)-expansion method to find new exact solutions of the perturbed nonlinear Schrödinger equation with Kerr law nonlinearity in optical fiber *** proposed method is not found ***,trigonometric and rational function solutions are *** solutions of the generalized Riccati equation are presented for the first time which are not reported *** solutions of the given nonlinear equation can be applied in ocean engineering for calculating the height of tides in the ocean.

关键词： New sub-equation method (G/G,1/G)-expansion method Generalized Riccati equation mapping method Perturbed nonlinear Schrödinger equation Exact solutions.

Pediatric non-alcoholic steatohepatitis:The first report on the ultrastructure of hepatocyte mitochondria

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World Journal of Gastroenterology 2014年第15期20卷 4335-4340页

作者： Joanna m Lotowska maria E Sobaniec-Lotowska Sylwia B Bockowska Dariusz m Lebensztejn Department of General Pathomorphology Medical University of Bialystok15269 BialystokPoland Department of medical Pathomorphology Medical University of Bialystok15269 BialystokPoland Department of Laboratory Diagnostics Maria Sklodowska-Curie Memorial Bialystok Oncology Center15027 BialystokPoland Department of Pediatrics Gastroenterology and AllergologyMedical University of Bialystok15274 BialystokPoland

AIm: To investigate the ultrastructure of abnormal hepatocyte mitochondria, including their cellular and hepatic zonal distribution, in bioptates in pediatric non-alcoholic steatohepatitis (NASH).

关键词： Pediatric non-alcoholic steatohepatitis Hepatocyte ultrastructure megamitochondria with crystalline inclusions Foamy cytoplasm of hepatocytes

Conventional generation emulation for power grids with a high penetration of wind power

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Clean Energy 2021年第1期5卷 93-103页

作者： Rasha El-Azab Eslam m.Wazeer m.ha.ed Daowd A.m.Abdel Ghany Electrical Power and machines Department Faculty of EngineeringHelwan UniversityCairoEgypt

Integrating large-scale wind plants with the electricity grids has many challenges for grid *** the variability and uncertainty of wind power,coordinating between different technologies of generation in the same grid can be considered the main problem,specifically for short-term frequency ***,a large penetration of wind power generation in modern power grids has a risky influence on the power-system ***-generation plants have contradictory behaviour compared to classic thermal plants,especially in active generated power-shortage events due to the variable nature of wind *** experience in wind plants keeps part of the available wind power unloaded,using what are known as deloading *** deloading techniques are usually applied to emulate the thermal-plant-governor function and confirm a proper spinning reserve for any active-power *** techniques decrease the generated power from wind plants continuously from maximum point tracking ***,the practical capacity,annual generated energy and economical income of wind plants are *** addition,grid-protection and control sub-schemes are set and designed according to the well-known conventional responses of thermal plants,which increase the need for thermal-plant-behaviour *** this paper,instead of the usual deloading methods,a supercapacitors scheme is proposed with wind turbines to emulate the response of conventional power *** study discusses the technical and economic benefits of the proposed addition of supercapacitors in the wind-plant-planning *** frequency grid-code indices are selected to evaluate studied *** results of the IEEE four-generation two-area system determines the effectiveness of suggested schemes *** System Advisor model(SAm)program estimates the economic benefits of a typical US study case compared with the existing wind-deloading technique.

关键词： wind energy planning analysis energy storage supercapacitor frequency stability

In-Plane Angular Correlation of α Particle-Fragments in a ^(84)Kr+^(27)Al Reaction at 8.5 meV/n

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Chinese Physics Letters 1998年第7期15卷 486-488页

作者： LIU Xin JIANG Dong-xing S.m.Lee Department of Technical Physics Peking UniversityBeijing 100871 Institute of Physics University of TsukubaIbraraki 305Japan

In-plane angular correlations between light charged particles and fragments with different charge number were measured in a ^(84)Kr+^(27)Al reaction at 8.5 meV/*** asymmetry in the angular correlation relative to the beam direction was found which cannot be explained in the fusion-fission reaction mechanism *** may imply the domination of deeply inelastic collisions over the complete fusion in the reaction.

关键词： reaction angular explained

乳腺mRI术前评价:利用倾向评分对浸润性小叶癌病人术后预后的评估

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国际医学放射学杂志 2018年第4期 477-478页

作者： S.m.ha E.Y.Chae J.H.Cha H.H.Kim H.J.Shin W.J.Choi 李彦橙 Department of Radiology Research Institute of RadiologyAsan Medical CenterUniversity of Ulsan College of Medicine

目的利用倾向评分匹配法探讨乳腺浸润性小叶癌(ILC)病人术前乳腺mR成像与手术预后的关系,以确定mRI检查是否对乳腺癌ILC亚型有益。材料与方法 2005年1月—2016年12月期间接受手术的603例ILC病人,其中369例(61.2%)行乳腺mRI检查。本研究... 详细信息

目的利用倾向评分匹配法探讨乳腺浸润性小叶癌(ILC)病人术前乳腺mR成像与手术预后的关系,以确定mRI检查是否对乳腺癌ILC亚型有益。材料与方法 2005年1月—2016年12月期间接受手术的603例ILC病人,其中369例(61.2%)行乳腺mRI检查。本研究对mRI发现但乳腺钼靶和超声检查中未发现的病变进行统计,并分析术中因疾病情况作出的改变。在倾向评分匹配后,将196例病人分成mR组和非mR组,并平衡两组间与病人、肿瘤特征以及各种临床特征有关的17个可能的混杂变量。比较2组手术结果。结果 369例接受mRI检查的病人中,145例(39.3%)发现其他病变,这145例病人中有95例(65.5%)发现恶性病变。在369例病人中有94例(25.5%)因mRI检查结果而改变手术方式。根据病理结果显示,这94例病人中84例(89.4%)手术方式的变更是合理的。在倾向评分匹配分析中,与未进行乳腺mR成像病人相比,乳腺mRI检查与较低重复手术率相关(比值比,0.140;PmRI检查提高了乳腺恶性肿瘤的检出,在不增加乳腺切除率的同时可以显著降低重复手术的可能性。

关键词： mRI 浸润性小叶癌

Divergent molecular and growth responses of young“Cabernet Sauvignon”(Vitis vinifera)plants to simple and mixed infections with Grapevine rupestris stem pitting-associated virus

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Horticulture Research 2020年第1期7卷 2706-2719页

作者： m.Tobar N.Fiore A.G.Pérez-Donoso R.León I.m.Rosales m.Gambardella Pontificia Universidad Católica de Chile Facultad de Agronomía e Ingeniería ForestalVicuña Mackena 4860MaculSantiago 7820436Chile Universidad de Chile Facultad de Ciencias AgronómicasAvenida Santa Rosa 11315La PintanaSantiago 8820808Chile

Grapevine rupestris stem pitting associated virus(GRSPaV)is one of the most widely distributed viruses;even so,little is known about its effect on Vitis *** provide new insights,the effects of single and mixed GRSPaV infections on the *** cultivar“Cabernet Sauvignon”were studied by evaluating growth parameters,such as measurements of the total plant length,the number and distance of internodes and the number of leaves per *** addition,parameters relating to gas exchange,i.e.,the stomatal conductance,net photosynthetic rate,internal CO2 concentration and leaf transpiration,were also *** the measurements were performed in one-and two-yearold plants with a single GRSPaV infection or mixed infections of GRSPaV and Grapevine fanleaf virus(GFLV).The results show that the plant phytosanitary status did not significantly alter the growth and gas exchange parameters in oneyear-old ***,in two-year-old plants,single GRSPaV infections increased shoot elongation,which was accompanied by the overexpression of genes associated with the gibberellic acid response *** gas exchange parameters of these plants were negatively affected,despite exhibiting higher LHCII gene *** with mixed infections did not have modified growth parameters,although they presented a greater reduction in the primary photosynthetic parameters evaluated with no change in LHCII *** results presented here confirm the co-evolution hypothesis for *** and GRSPaV during the early stages of plant development,and they provide new evidence about the effects of GRSPaV and GFLV co-infections on the“Cabernet Sauvignon”cultivar.

关键词： Vitis infections vinifera

Optical nonlinearities of tetracarbonyl-chromium triphenyl phosphine complex

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Chinese Physics B 2017年第4期26卷 214-218页

作者： m D Zidan A W Allaf A Allahham A AL-Zier Department of Physics Atomic Energy CommissionP.O.Box 6091DamascusSyria Department of Chemistry Atomic Energy CommissionP.O.Box 6091DamascusSyria

The new tetracarbonyl - chromium-triphenyl phosphine complex was synthesized and characterized using ultraviolet（UV）-visible,Fourier transform infrared（FTIR）,and nuclear magnetic resonance（NmR） *** characterization results confirm the molecular structure of the new *** z-scan measurements were done by diode laser[continuous wave（CW）]to estimate the nonlinear optical parameter（X^3）.The results led to calculate three parameters：the groundstate cross sections（σ_g）,the excited-state cross sections（σ_（ex））,and thermo-optic coefficient of the new *** study indicated that our complex is a suitable for photonic applications.

关键词： tetra carbonyl-chromium triphenyl phosphine Z-scan technique nonlinear optical materials

Evaluation of computer imaging technique for predicting the SPAD readings in potato leaves

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Information Processing in Agriculture 2017年第4期4卷 275-282页

作者： m.S.Borhan S.Panigrahi m.A.Satter H.Gu Research Specialist Agricultural and Biosystems Engineering DepartmentNorth Dakota State UniversityFargoND 58105USA Electrical and Computer Engineering Technology Purdue University West LafayetteIN 47907USA Agricultural and Biosystems Engineering Department North Dakota State UniversityFargoND 58105USA Graduate Student Computer Science DepartmentNorth Dakota State UniversityFargoND 58105USA Senior Software Developer Psychology DepartmentNorth Dakota State UniversityFargoND 58105USA

Facilitating non-contact measurement,a computer-imaging system was devised and evaluated to predict the chlorophyll content in potato leaves.A charge-coupled device(CCD)camera paired with two optical filters and light chamber was used to acquire green(550±40 nm)and red band(700±40 nm)images from the same *** leaves from 15 plants differing in coloration(green to yellow)and age were selected for this *** based image features,such as mean and variances of green and red band images,were extracted from the *** analyses demonstrated that the variations in SPAD meter reading could be explained by themeangrayandvariances of gray scale *** fitted least square models based on the mean gray scale levels were inversely related to the chlorophyll content of the potato leaf with a R^2 of 0.87 using a green band image and with an R2 of 0.79 using a red band *** the extracted four image features,the developed multiple linear regression model predicted the chlorophyll content with a high R^2 of 0.88).The multiple regression model(using all features)provided an average prediction accuracy of 85.08% and amaximum accuracy of 99.8%.The prediction model using only mean gray value of red band showed an average accuracy of 81.6% with a maximum accuracy of 99.14%.

关键词： Computer imaging Chlorophyll SPAD meter Regression Prediction accuracy