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基于FCS算法的光伏阵列最大功率追踪

楚雄师范学院学报 2024年第3期39卷 1-7页

作者：饶鸿江徐道龙何永泰林泉刘洋智彭洁楚雄师范学院物理与电子科学学院云南楚雄675000

局部阴影情况下,光伏阵列输出功率具有多峰值特性,针对最大功率点跟踪(Maximum power point tracking,MPPT)算法在实际应用中存在着收敛速度较慢,效率较低,且容易陷入局部功率极值的问题,将兼顾收敛速度、精度、功率稳定性的快速布谷鸟... 详细信息

局部阴影情况下,光伏阵列输出功率具有多峰值特性,针对最大功率点跟踪(Maximum power point tracking,MPPT)算法在实际应用中存在着收敛速度较慢,效率较低,且容易陷入局部功率极值的问题,将兼顾收敛速度、精度、功率稳定性的快速布谷鸟搜索(Fast cuckoo search,FCS)算法应用于光伏阵列最大功率追踪。FCS算法采用自适应步长和机会因子可避免过早收敛,全局搜索和跳出局部搜索能力强,收敛速度快,算法后期局部开发能力强,功率振荡小,功率输出稳定,最大功率追踪精度高。仿真表明,在静态阴影、动态阴影条件下,FCS算法较灰狼算法(Grey wolf optimizer,GWO)、粒子群算法(Particle swarm optimization,PSO)具有更快地收敛速度和更高的收敛精度,且稳定性好,有效地提升光伏阵列的输出效率。

关键词：光伏阵列 FCS算法局部阴影最大功率追踪

Effects of velocity and thermal wall slip on magnetohydrodynamics(MHD)boundary layer viscous flow and heat transfer of a nanofluid over a non-linearly-stretching sheet:a numerical study

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Propulsion and Power Research 2018年第2期7卷 182-195页

作者： Dodda Ramya R.Srinivasa Raj. j.Anand rao A.j.Chamkha Department of Mathematics University College of ScienceOsmania UniversityHyderabad 500007Telangana StateIndia Department of Engineering Mathematics GITAM UniversityHyderabad CampusRudraram 502329Medak(Dt)Telangana StateIndia Mechanical Engineering Department Prince Mohammad Bin Fahd UniversityP.O.Box 1664Al-Khobar 31952Saudi Arabia

In this analysis,the boundary layer viscous flow of nanofluids and heat transfer over a non-linearly-stretching sheet in the presence of a magnetic field is *** and thermal slip conditions are considered instead of no slip conditions at the boundary.A similarity transformation set is used to transform the governing partial differential equations into non-linear ordinary differential *** reduced equations are solved numerically using the Keller box *** influence of the governing parameters on the dimensionless velocity,temperature,nanoparticle concentration as well as the skin friction coefficient,Nusselt number,and local Sherwood number are *** is found that as the velocity slip parameter increases,the velocity profile is decreased and the skin friction and heat transfer decreased while the mass transfer is *** the thermal slip parameter causes decreases in the heat and mass transfer *** results are presented in both graphical and tabular forms.

关键词： Magnetogydrodynamics(MHD) Nanofluid Non-linearly stretching sheet Velocity slip Thermal slip

基于CiteSpace及VOSviewer的脑出血手术治疗相关研究现状及趋势的可视化分析

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中国脑血管病杂志 2024年第7期21卷 455-466页

作者：曾俊泓沈桃桃伍国锋欧阳静饶佳琴罗沙沙张艺之熊翠顾颖贵州医科大学护理学院贵阳550004 贵州医科大学附属医院急诊神经科贵州医科大学附属医院消毒供应中心贵州医科大学附属医院护理部

目的通过对近10年脑出血手术治疗相关文献进行可视化分析,总结并探讨脑出血手术治疗相关领域研究现状、热点及趋势。方法检索并筛选中国知网和Web of Science数据库2014年1月1日至2024年4月1日脑出血手术治疗相关中、英文文献,采用CiteS... 详细信息

目的通过对近10年脑出血手术治疗相关文献进行可视化分析,总结并探讨脑出血手术治疗相关领域研究现状、热点及趋势。方法检索并筛选中国知网和Web of Science数据库2014年1月1日至2024年4月1日脑出血手术治疗相关中、英文文献,采用CiteSpace、VOSviewer等软件对发表文献数量、作者、国家、机构等进行可视化分析,并结合关键词聚类网络分析图谱、关键词突现强度和关键词时间线图谱内容分析脑出血手术治疗相关领域的研究热点和趋势。结果(1)经检索与筛选,共纳入脑出血手术相关中、英文文献3456篇,其中中文文献2173篇,英文文献1283篇。2014年至2021年,脑出血手术相关中文文献年发表数量高于英文文献,但自2016年起,中文文献发表数量开始有所下降。英文文献发表数量总体呈现增长趋势。(2)英文文献共检索出6367位作者,其中以Mocco j.Hanley Daniel F、Ziai Wendy C、You Chao、Tang Zhouping等研究者为代表的合作网络最为突出;中文文献共检索出6522名作者,其中以王丽琨、蔡强、库洪彬、张山、朱遂强等作者为代表的合作网络较为突出。(3)对发表英文文献的国家进行分析,结果显示,共31个国家参与脑出血手术治疗相关研究,其中中国发表文献数量位居首位(505篇),美国与德国分别位列第2位(330篇)和第3位(106篇);中心性排名前3的国家依次为美国(0.32)、中国(0.16)和加拿大(0.11)。英文文献发表量排名前3的机构分别为约翰斯·霍普金斯大学(51篇)、俄亥俄州立大学(39篇)和哈佛大学(38篇);国内四川大学(32篇)、华中科技大学(30篇)、首都医科大学(27篇)等机构发表多篇英文文献;武汉大学人民医院(15篇)、贵州医科大学附属医院(13篇)、延安大学附属医院(13篇)等发表了多篇中文文献。英文文献研究机构间合作较为密切;中文文献研究者多以所在医疗单位建立研究团队,团队间合作相对较少。(4)脑出血手术治疗相关研究主要围绕手术方式、并发症及围手术期综合治疗展开。研究热点包括高血压脑出血、微创手术技术及围手术期的管理和治疗,其中“神经内镜”是中文文献最近一次突现的关键词,中心性较高,突现强度最大;“随机试验”是英文文献突现强度最大的关键词。人工智能与微创技术相融合、脑出血手术的治疗和管理策略优化、危险因素分析和影像学价值探讨可能是未来的研究趋势。结论近10年,脑出血手术治疗相关研究的文献发表数量处于稳定发展阶段,研究内容涉及手术技术、诊疗、评估、管理等方面。核心作者群所在的科研团队为发表文献的主力。手术技术优化、并发症管理、多中心大样本临床试验、人工智能与微创技术融合等可能是该领域研究热点和趋势。

关键词：脑出血文献计量学脑出血手术可视化分析

Photocatalytic properties of hierarchical CuO nanosheets synthesized by a solution phase method

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j.urnal of Environmental Sciences 2018年第7期30卷 115-124页

作者： Martha Purnachander rao j.rry j.Wu Abdullah M.Asiri Sambandam Anandan Muthupandian Ashokkumar Nanomaterials and Solar Energy Conversion Lab Department of Chemistry National Institute of Technology Department of Environmental Engineering and Science Feng Chia University The Center of Excellence for Advanced Materials Research King Abdulaziz University School of Chemistry University of Melbourne

CuO nanomaterials were synthesized by a simple solution phase method using cetyltrimethylammonium bromide（CTAB） as a surfactant and their photocatalytic property was determined towards the visible-light assisted degradation of Reactive Black-5 dye. A detailed mechanism for the formation of CuO nanostructures has been *** effect of various experimental parameters such as catalyst amount, dye concentration,p H and oxidizing agent on the dye degradation efficiency was studied. About 87% dye was degraded at p H 2 in the presence of CuO nanosheets under visible light. The enhanced photocatalytic activity of CuO nanosheets can be ascribed to good crystallinity, grain size,surface morphology and a strong absorption in the visible region. CuO is found to be a promising catalyst for industrial waste water treatment.

关键词： CuO Photocatalytic degradation Visible light Reactive Black-5 Reusability

Modeling of aggregation kernels for fluidized beds using discrete particle model simulations

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Particuology 2014年第2期12卷 134-144页

作者： Nageswara rao Narni Mirko Peglow Gerald Warnecke j.tendra Kumar Stefan Heinriche j.A.M.Kuipers Department of Mathematics Rajiv Gandhi University of Knowledge TechnologiesGachibowliHyderabad 500032India Institute for Process Engineering Otto-von-Guericke-University MagdeburgUniversitatsplatz 2D-39106 MagdeburgGermany Institute for Analysis and Numerics Otto-von-Guericke-University MagdeburgUniversitatsplatz 2D-39106 MagdeburgGermany Department of Mathematics ⅡT KharagpurIndia Institute of Solids Process Engineering and Particle TechnologyHamburg University of TechnologyHamburgGermany Eindhoven University of Technology-SMR P.O.Box 5135600 MB EindhovenThe Netherlands

Aggregation is one of the many important processes in chemical and process engineering. Several researchers have attempted to understand this complex process in fluidized beds using the macro-model of population balance equations （PBEs）. The aggregation kernel is an effective parameter in PBEs, and is defined as the product of the aggregation efficiency and collision frequency functions. Attempts to derive this kernel have taken different approaches, including theoretical, experimental, and empirical techniques. The present paper calculates the aggregation kernel using micro-model computer simulations, i.e., a discrete particle model. We simulate the micro-model without aggregation for various initial conditions, and observe that the collision frequency function is in good agreement with the shear kernel. We then simulate the micro-model with aggregation and calculate the aggregation efficiency rate.

关键词： Aggregation kernelsMulti-phase flowCollision frequency functionAggregation efficiency rateBed parameter

Macrophage polarization in response to wear particles in vitro

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Cellular & Molecular Immunology 2013年第6期10卷 471-482页

作者： j.seph K Antonios Zhenyu Yao Chenguang Li Allison j.rao Stuart B Goodman Orthopaedic Research Laboratories Department of Orthopaedic Surgery Stanford University School of Medicine Stanford CA USA

Total j.int replacement is a highly successful surgical procedure for treatment of patients with disabling arthritis and j.int dysfunction. However, over time, with high levels of activity and usage of the j.int, implant wear particles are generated from the articulating surfaces. These wear particles can lead to activation of an inflammatory reaction, and subsequent bone resorption around the implant （periprosthetic osteolysis）. Cells of the monocyte/macrophage lineage orchestrate this chronic inflammatory response, which is dominated by a pro-inflammatory （M 1） macrophage phenotype rather than an anti-inflammatory pro-tissue healing （M2） macrophage phenotype. While it has been shown that interleukin-4 （IL-4） selectively polarizes macrophages towards an M2 anti-inflammatory phenotype which promotes bone healing, rather than inflammation, little is known about the time course in which this occurs or conditions in which repolarization through I L-4 is most effective. The goal of this work was to study the time course of murine macrophage polarization and cytokine release in response to challenge with combinations of polymethyl methacrylate （PMMA） particles, lipopolysaccharide （LPS） and IL-4 in vitro. Treatment of particle-challenged monocyte/macrophages with IL-4 led to an initial suppression of pro-inflammatory cytokines and inducible nitric oxide synthase （iNOS） production and subsequent polarization into an M2 anti-inflammatory phenotype. This result was optimized when IL-4 was delivered before PMMA particle challenge, to an M 1 phenotype rather than to uncommitted （MO） macrophages. The effects of this polarization were sustained over a 5-day time course. Polarization of M1 macrophages into an M2 phenotype may be a strategy to mitigate wear particle associated periprosthetic osteolysis.

关键词： IL-4 macrophage polarization osteolysis PMMA particles total j.int replacement

Gas Chromatography Analysis of Resin and Fatty Acids from Laboratory Generated Bleach Plant Effluents

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中国造纸 2007年第5期26卷 29-33页

作者： Chhaya Sharma S. Mohanty S. Kumar N.j. rao Department of Paper Technology llT-Roorkeelndia Gas Authority of India Ltd. Calcutta India j. Institute Gunna India

Laboratory generated spent bleached liquor from the chlorination, caustic extraction stage of mixed wood kraft pulp processing has been analyzed both qualitatively and quantitatively for various resin & fatty acids by using GC. A number of resin acids, saturated and unsaturated fatty acids, chloro fatty and resin acid have been detected and their concentrations are estimated. The results are compared with results on different agriculture residue/hardwood pulps, which were reported earlier. The concentrations of various compounds detected have also been compared with their reported LC50 values.

关键词：气相色谱分析脂肪酸树脂酸漂白废液

Electrospun Fibers Control Drug Delivery for Tissue Regeneration and Cancer Therapy

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Advanced Fiber Materials 2022年第6期4卷 1375-1413页

作者： Longfei Li Ruinan Hao j.nj.e Qin j.an Song Xiaofeng Chen Feng rao j.liang Zhai Yu Zhao Liqun Zhang j.aj.a Xue State Key Laboratory of Organic‑Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China Laboratory of Biomedical Materials Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China Trauma Center Peking University People’s HospitalBeijing 100730People’s Republic of China Department of Orthopaedics Peking Union Medical College HospitalChinese Academy of Medical SciencesBeijing 100730People’s Republic of China

Versatile strategies have been developed to construct electrospun fiber-based drug delivery systems for tissue regeneration and cancer *** first introduce the construction of electrospun fiber scaffolds and their various structures,as well as various commonly used types of ***,we discuss some representative strategies for controlling drug delivery by electrospun fibers,with specific emphasis on the design of endogenous and external stimuli-responsive drug delivery ***,we summarize the recent progress on controlling drug delivery with electrospun fiber scaffolds for tissue engineering,including soft tissue engineering(such as skin,nerve,and cardiac repair)and hard tissue engineering(such as bone,cartilage,and musculoskeletal systems),as well as for cancer ***,we provide future development directions and challenges facing the use of electrospun fibers for controlled drug delivery,aiming to provide insights and perspectives for the development of smart drug delivery platforms and improve clinical therapeutic effects in tissue regeneration and cancer therapy.

关键词： Electrospinning Electrospun fibers Drug delivery Stimuli-responsive Tissue engineering Cancer therapy

The Role of the Southern Hemisphere Polar Cell on Antarctic Sea Ice Variability

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International j.urnal of Geosciences 2016年第2期7卷 120-134页

作者： Praveen rao Teleti Alvarinho j. Luis Earth System Science Organization National Centre for Antarctic and Ocean Research Ministry of EarthSciences Govt. of India Headland Sada Goa India

The study explores modes of variability in the Southern Polar Cell and their relationship with known global climate modes and Antarctic sea ice. It is found that Polar Cell is barotropic in nature and 500 hPa geo-potential height (Z500) field can satisfactorily represent variability in the Polar Cell. First, three leading Empirical Orthogonal Function (EOF) modes of Z500 account for nearly 80% of observed variability in the Polar Cell. Dominant mode (PC1500) comprises of high pressure divergence zone over Antarctica. Second leading mode (PC2500) is low pressure zone covering Amundsen-Bellingshausen Sea (ABS) similar to ABS low feature. A new climate mode called Polar Coastal Index (PCI) is defined, which describes more than 15% and close to 30% variability of circumpolar trough and ABS low, respectively. Out of four modes defined in this study, only PCI and PC2500 show linear trends and clear seasonality. Interestingly, both modes are affected by modulation of ABS low due to tropical ENSO forcing. SAM signature is present in Polar Cell as PC1500 shares large variance with it. The largest impact on sea ice comes from PC2500 followed by PC1500 in the Antarctic Dipole regions. However, this study suggests contemporary sea ice trends cannot be sustained, and can reverse given that trends in PCI and PC2500 favour a reversal. These results indicate that ENSO-driven Polar Cell variability plays a crucial role influencing Antarctic sea ice as it interacts with other climate modes and leads the combined impact at the interannual time scale.

关键词： Antarctica Sea Ice Polar Cell PCI ENSO Teleconnection