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广东省周边海域风能和波浪能联合开发潜力分析

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太阳能学报 2024年第8期45卷 651-659页

作者：李妍妮史宏达曹飞飞中国海洋大学工程学院青岛266404 山东省海洋工程重点实验室青岛266100 青岛市海洋可再生能源重点实验室青岛266100

参考现有海上风电场位置选择广东省周边海域的5处联合开发场址,基于2001—2020年的风和波浪再分析数据,从资源储量和稳定性等角度对选址开展资源特征的详细分析,并评估不同额定功率的6种风力机和6种波浪能装置在选址处的发电性能。结果... 详细信息

参考现有海上风电场位置选择广东省周边海域的5处联合开发场址,基于2001—2020年的风和波浪再分析数据,从资源储量和稳定性等角度对选址开展资源特征的详细分析,并评估不同额定功率的6种风力机和6种波浪能装置在选址处的发电性能。结果表明,广东省周边海域的风能和波浪能均有明显的季节分布差异,在秋冬季节更为丰富且更为稳定;风能和波浪能具有较强的相关性;风力机额定功率越大平均发电功率越大,但容量因数随额定功率的增大呈现波动趋势;风力机的容量因数明显大于波浪能装置;综合考虑多种因素,W2E-215/9.0风力机和Wave Star波浪能装置更适合投放于所提5处场址。

关键词：风能波浪能资源评估风力机波浪能转换

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基于点吸收式波能装置风浪联合获能系统动力特性研究

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太阳能学报 2024年第6期45卷 29-36页

作者：于明琦曹飞飞魏志文史宏达姜娟田会元中国海洋大学工程学院青岛266100 中国海洋大学山东省海洋工程重点实验室青岛266100 青岛市海洋可再生能源重点实验室青岛266100 上海勘测设计研究院有限公司上海200335

基于风和波浪的伴生关系及波浪能与风能同时获取的可行性,提出一种基于半潜式风力机与点吸收式波能装置的新型风浪联合获能系统。建立考虑等效(PTO)的全过程风-浪-多体耦合时域分析模型,并研究波能装置设计参数对波浪能输出功率的影响规... 详细信息

基于风和波浪的伴生关系及波浪能与风能同时获取的可行性,提出一种基于半潜式风力机与点吸收式波能装置的新型风浪联合获能系统。建立考虑等效(PTO)的全过程风-浪-多体耦合时域分析模型,并研究波能装置设计参数对波浪能输出功率的影响规律,重点研究风浪联合运行海况下新型风浪联合获能系统的结构动力响应特征与获能特性。结果表明,波能装置的安装对平台纵荡运动和系泊系统产生不利影响,对风力涡轮机的影响较小,此外垂荡和纵摇响应均随波能装置的加入得到抑制,纵摇角平均值减小25%,垂荡位移标准差减小42%,与漂浮式风力机相比,联合获能系统的平均输出功率增加17%。

关键词：波浪能转换海上风电时域分析动力响应获能特性联合获能系统

杭州市流感样病例中流感病毒和肠道病毒流行特征分析

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病毒学报 2024年第3期40卷 536-545页

作者：邱晓枫曹飞飞程实潘劲草李钧杭州市疾病预防控制中心杭州310021

本研究关注浙江省杭州市流感样病例中流感病毒(Influenza virus,IV)和肠道病毒(Enterovirus,EV)的病原谱及流行特征,为IV和EV感染防治提供了科学依据。纳入2021年杭州市流感监测哨点医院2762份流感样病例咽拭子样本,检出IV 188例(6.81%)... 详细信息

本研究关注浙江省杭州市流感样病例中流感病毒(Influenza virus,IV)和肠道病毒(Enterovirus,EV)的病原谱及流行特征,为IV和EV感染防治提供了科学依据。纳入2021年杭州市流感监测哨点医院2762份流感样病例咽拭子样本,检出IV 188例(6.81%)、EV 286例(10.35%)、IV和EV共感染9例(0.33%)。结果显示:IV流行季节主要是秋冬季、8~17岁年龄组可能是重点人群;EV流行季节主要是夏季、8岁以下儿童是重点人群。IV阳性率无性别差异(χ^(2)=0.122,P=0.762),EV阳性率男性高于女性(χ^(2)=18.913,P<0.001)。IV阳性样本均为乙型流感Victoria亚型。EV阳性标本中128例(44.76%)测序成功,156例(54.55%)分型成功,包括5种HEV-A、6种HEVB、6种RV-A。IV优势基因型为BV,EV优势基因型为CVA4。2021年浙江省杭州市流感样病例中IV、EV感染具有明确的季节性和年龄特征。

关键词：流感病毒肠道病毒流感样病例基因型流行特征

Study on Hydraulic System Efficiency of Heaving-Buoy Wave Energy Converter

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Journal of Ocean University of China 2018年第5期17卷 1044-1052页

作者： SHI Hongda ZHAO Chenyu LIU Zhen cao feifei College of Engineering Ocean University of ChinaQingdao 266100China Shandong Provincial Key Laboratory of Ocean Engineering Qingdao 266100China

The hydraulic system is the key component in the widely used wave energy converters(WEC).In this paper,we theoretically analyze and describe our investigation of the efficiency of the hydraulic system by simulation and model testing of the combined heaving-buoy *** derive a new governing equation that includes nonlinear hydraulic resistance in the power take-off(PTO).We conducted a physical model experiment based on a 100-kW prototype and applied a hydraulic system with an energy *** model test results reveal an important parameter related to efficiency with respect to nonlinear hydraulic *** also studied the relationship between the efficiency and the initial ***,based on our numerical simulation results,we discuss the effect on efficiency of the gas content of the hydraulic fluid and ways to reduce its impact.

关键词： hydraulic system PTO nonlinear hydraulic resistance efficiency gas content

A high-loading and cycle-stable solid-phase conversion sulfur cathode using edible fungus slag-derived microporous carbon as sulfur host

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Nano Research 2023年第6期16卷 8360-8367页

作者： Hui Li Xiangjiang Wu Sijie Jiang Qian Zhang Yuliang cao Hanxi Yang feifei cao Xinping Ai Hubei Key Laboratory of Electrochemical Power Sources College of Chemistry&Molecular ScienceWuhan UniversityWuhan 430072China College of Science Huazhong Agricultural UniversityWuhan 430070China

Developing a high sulfur(S)-loading cathode with high capacity utilization and long term cyclability is a key challenge for commercial implementation of Li-S battery *** overcome this challenge,we propose a solid-phase conversion sulfur cathode by using an edible fungus slag-derived porous carbon(CFS)as sulfur host to fabricate the S/CFS composite and meanwhile,utilizing the vinyl carbonate(VC)as co-solvent of the ether-based electrolyte to in-situ form a protective layer on the S/CFS composite surface through its nucleophilic reaction with the freshly generated lithium polysulfides(LiPSs)at the very beginning of initial discharge,thus isolating the interior sulfur from the outer electrolyte and inhibiting the further generation of soluble *** from the ultrahigh specific surface area of>3,000 m^(2)·g^(−1),ideal pore size of2.0 cm^(3)·g^(−1)of the CFS host matrix,the S/CFS cathode even with a high S-loading of 80 wt.%(based on the weight of S/CFS composite)can still operate in a solid-phase conversion manner in the VC-ether co-solvent electrolyte to exhibit a high reversible capacity of 1,557 mAh·g^(−1),a high rate capability with 50%remaining capacity at 2 A·g^(−1)and a high cycling efficiency of 99.9%over 500 *** results presented in this work suggest that a combined action of solid-phase conversion electrochemistry and nanoarchitectured host structure may provide a new path for the design and development of practical lithium-sulfur batteries.

关键词： lithium-sulfur batteries solid-phase conversion high sulfur loading cathode edible fungus slag-derived carbon nucleophilic reaction

Simulation of the Power Take-off System for a Heaving Buoy Wave Energy Converter

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Journal of Ocean University of China 2020年第3期19卷 497-504页

作者： cao feifei SHI Hongda LI Ming DONG Xiaochen LI Demin College of Engineering Ocean University of ChinaQingdao 266100China Shandong Provincial Key Laboratory of Ocean Engineering Qingdao 266100China Qingdao Municipal Key Laboratory of Ocean Renewable Energy Qingdao 266100China

The heaving buoy wave energy device is popular for wave conditions with small wave heights and short periods. This paper presents the design of a wave energy converter composed of a gyro buoy, a hydraulic power take-off, and an electricity generation system. The energy accumulators are used to improve the output power with different control strategies. The quantity relations between each component are established using theoretical methods. The simulation model describes the energy conversion and calculates the operation time, energy capacity, and output power of the device under different initial pressures, release pressures, and electric resistances. As a result, the capacity is determined by the electronic load, and the maximum output power can be obtained when the accumulators are turned on and off at the same time. This study investigates the factors influencing the electric energy production and can be used to guide the optimization of this type of device.

关键词： wave energy heaving buoy power-take-off accumulator output power

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同轴双浮体波能装置参数研究

太阳能学报 2024年第7期45卷 128-134页

作者：曹飞飞王翠韩蒙李彦平陈震史宏达中国海洋大学工程学院青岛266100 山东省海洋工程重点实验室青岛266100 青岛市海洋可再生能源重点实验室青岛266100 自然资源部第一海洋研究所青岛266061

该文以同轴双浮体波能装置为研究对象,以山东省波浪场资源为背景进行条件,首先提出Matlab-APDL-AQWA联合仿真系统,实现波能-功率全过程模拟,并将模拟结果与文献中的物理模型试验数据进行对比验证。同时探究随机波浪作用下浮体半径、质... 详细信息

该文以同轴双浮体波能装置为研究对象,以山东省波浪场资源为背景进行条件,首先提出Matlab-APDL-AQWA联合仿真系统,实现波能-功率全过程模拟,并将模拟结果与文献中的物理模型试验数据进行对比验证。同时探究随机波浪作用下浮体半径、质量参数及PTO参数对装置获能平均功率的影响。研究表明,双浮体的半径参数和质量参数会显著影响装置的平均功率,装置获能随PTO阻尼系数的增大呈先增后减的趋势,而PTO刚度系数在一定范围内变化对装置获能影响不明显。

关键词：波浪能联合仿真同轴双浮体 PTO阻尼平均功率

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2021-2022年杭州新型冠状病毒阳性病例中人鼻病毒的共感染特征分析

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中华实验和临床病毒学杂志 2024年第3期38卷 299-303页

作者：程实于新芬曹飞飞周银燕潘劲草杭州市疾病预防控制中心(杭州市卫生监督所)卫生检验中心杭州310021

目的了解新型冠状病毒(2019 novel coronavirus,2019-nCoV)阳性病例中人鼻病毒(human rhinovirus,HRV)的共感染特征及系统进化特征。方法使用实时荧光定量PCR(real-time fluorescence quantitative polymerase chain reaction,qPCR)对7213份2019-nCoV核酸阳性样本进行了包括HRV在内的10种常见呼吸道病毒检测,分析其共感染特征;对HRV核酸阳性样本进行了VP4/VP2基因片段测序并构建进化树,分析其系统进化特征。结果2019-nCoV核酸阳性样本中合并HRV感染最多,为97例,阳性率1.34%;其次是普通冠状病毒(coronavirus,CoV),为36例,阳性率0.50%。HRV共感染率与其他病毒相比,差异具有统计学意义(χ^(2)=318.09,P<0.001)。18岁以下组HRV共感染率最高,差异具有统计学意义(χ^(2)=36.77,P<0.001)。共感染HRV未呈现明显季节性。其中39株HRV基因片段测序成功(39/97,40.21%),进化树分析表明,10株被划分到HRV-A组,9株被划分到HRV-B组,20株被划分到HRV-C组。39份样本共检测到17个血清型,其中B6和C15为优势血清型,分别为6株(HRV-B中占比66.67%)和14株(HRV-C中占比70%),其他血清型呈散在分布。结论HRV是2019-nCoV核酸阳性病例中共感染率最高的病毒类呼吸道病原体,共感染率在18岁以下组最高。杭州地区2019-nCoV阳性病例中共感染的HRV-A组、HRV-B组和HRV-C组均有发现,血清型呈现多样性。

关键词：新型冠状病毒人鼻病毒共感染

Impacts of land conversion and management measures on net primary productivity in semi-arid grassland

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Ecosystem Health and Sustainability 2020年第1期6卷 434-449,433页

作者： feifei cao Jiaxun Li Xiao Fu Gang Wu State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina

Ecological restoration measures implemented in China have profoundly impacted vegetation *** study aimed to estimate the effects of the land conversion and management measures on the grassland ecosystem in semi-arid *** use data were employed from 2000 to 2015 to compare land conversion and coverage changes in Xilingol ***,the contributions of land conversion and management policies were quantified by assessing the difference between actual NPP and climate-induced NPP *** results indicated that the grassland area had a net loss of 534.42 km^(2),and the net area of increased vegetation coverage was 74,683.05 km^(2).Furthermore,the total NPP increased by 8,010.73 Gg C·yr^(−1)(1 Gg=10^(9)g),of which the human activities,including grazing management measures(+6,809.40 Gg C·yr^(−1))and land conversion(45.72 Gg C·yr^(−1))contributed to 85.58%of the increase in *** from desert and farmland dominated grassland expansion and NPP increase,while urbanization and desertification caused large grassland reduction and NPP *** grazing management increased vegetation NPP in most regions except for some regions in the desert steppe and the farming-pastoral *** policies should be further adjusted to strengthen the management of the desert steppe and farming-pastoral regions.

关键词： Grassland degradation land use and land cover change management measures and policies net primary productivity(NPP) Xilingol grassland anthropogenic/human activities affects