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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

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

Design of an unbuffered switch for network on-chip

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High Technology Letters 2013年第1期19卷 24-29页

作者：刘浩 cao feifei Zhou Ning Zou Xuecheng Liu Dongsheng Henan Electric Power Research Institute Henan Electric Power Industrial School Department of Electronic Science & Technology Huazhong University of Science & Technology

In the complex multicore chip system,network on-chip(NoC)is viewed as a kind of system interconnection that can substitute the traditional interconnect networks,which will improve the system performance and communication *** regard to the complex and large scale NoC,simple and efficient routing nodes are the critical factors to achieve low-cost and low-congestion communication *** paper proposes an unbuffered switch architecture and makes detailed analysis of the mechanism of buffer in the switch *** to the simulation results,the S-mesh using the unbuffered switch architecture is better in terms of the optimal performance in message latency than some typical NoC architectures,such as 2D-mesh,Fat-tree,Butterfly,Octagon and so *** synthesis results of design compiler indicate that the unbuffered switch has obvious advantages of achieving cost and operating speed for the chips.

关键词： network on-chip (NoC) router architecture buffer low-cost

Experimental Study on Interaction Between Degrees of Freedom in a Wave Buoy

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Journal of Ocean University of China 2019年第6期18卷 1256-1264页

作者： HUANG Shuting SHI Hongda cao feifei TAN Junzhe CHENG Haixun LI Demin LIU Shangze GONG Haoxiang TAO Ji College of Engineering Ocean University of ChinaQingdao 266100China Shandong Provincial Key Laboratory of Ocean Engineering Qingdao 266100China

Increasing degrees of freedom(DOFs)is a useful way to raise the power capture efficiency of oscillating wave energy ***,this study proposes a buoy with three DOFs,which are surge,heave,and *** hydrodynamic performance and power capture efficiency of the buoy is physically *** of unidirectional and coupled motions are compared to analyze the interaction effect between freedoms under conditions with and without power take-off *** capture width ratio and corresponding growth rates are also *** show that the buoy makes a periodic sinusoidal(or approximate)movement in every *** effect can cause an increase in the amplitude in one DOF and a decrease in the amplitudes of the *** phenomenon shows that the kinematic energy of the buoy redistributes to all DOFs compared with the unidirectional *** DOFs can improve the power absorption of the buoy in most cases,but the number of DOFs is not the more the better.

关键词： wave energy oscillating buoy multiple degrees of freedom

Enhancing m^(6)A modification in the motor cortex facilitates corticospinal tract remodeling after spinal cord injury

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Neural Regeneration Research 2025年第6期20卷 1749-1763页

作者： Tian Qin Yuxin Jin Yiming Qin feifei Yuan Hongbin Lu Jianzhong Hu Yong cao Chengjun Li Department of Spine Surgery and Orthopedics Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Key Laboratory of Organ Injury Aging and Regenerative Medicine of Hunan ProvinceChangshaHunan ProvinceChina National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Department of Sports Medicine Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina

Spinal cord injury typically causes corticospinal tract disruption. Although the disrupted corticospinal tract can self-regenerate to a certain degree, the underlying mechanism of this process is still unclear. N6-methyladenosine(m^(6)A) modifications are the most common form of epigenetic regulation at the RNA level and play an essential role in biological processes. However, whether m^(6)A modifications participate in corticospinal tract regeneration after spinal cord injury remains unknown. We found that expression of methyltransferase 14 protein(METTL14) in the locomotor cortex was high after spinal cord injury and accompanied by elevated m^(6)A levels. Knockdown of Mettl14 in the locomotor cortex was not favorable for corticospinal tract regeneration and neurological recovery after spinal cord injury. Through bioinformatics analysis and methylated RNA immunoprecipitation-quantitative polymerase chain reaction, we found that METTL14 regulated Trib2 expression in an m^(6)A-regulated manner, thereby activating the mitogen-activated protein kinase pathway and promoting corticospinal tract regeneration. Finally, we administered syringin, a stabilizer of METTL14, using molecular docking. Results confirmed that syringin can promote corticospinal tract regeneration and facilitate neurological recovery by stabilizing METTL14. Findings from this study reveal that m^(6)A modification is involved in the regulation of corticospinal tract regeneration after spinal cord injury.

关键词： corticospinal tract remodeling epigenetic regulations locomotor cortex m^(6)A modification methyltransferase 14 protein(METTL14) mitogen-activated protein kinase neural regeneration spinal cord injury syringin TRIB2

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硅树脂涂层对混凝土抗氯离子侵蚀性能的影响

新型建筑材料 2019年第12期46卷 125-128,131页

作者：曹菲菲安徽理工大学土木建筑学院

以聚烷基三烷氧基硅氧烷为混凝土涂层材料,制备硅树脂涂层混凝土试件,系统研究了硅树脂涂层对试件防水性能、抗氯离子侵蚀性能、抗碳化性能的影响。结果表明:硅树脂涂层有效提高混凝土试件的抗氯离子侵蚀性能,干燥收缩量明显减小,具有... 详细信息

以聚烷基三烷氧基硅氧烷为混凝土涂层材料,制备硅树脂涂层混凝土试件,系统研究了硅树脂涂层对试件防水性能、抗氯离子侵蚀性能、抗碳化性能的影响。结果表明:硅树脂涂层有效提高混凝土试件的抗氯离子侵蚀性能,干燥收缩量明显减小,具有良好的防水效果。硅树脂的最佳涂覆量为250 g/m2,此时,与空白试件相比,试件的毛细吸水系数降低了91.74%,氯离子扩散系数降低了80.84%,碳化深度减小了77.79%,混凝土耐久性提高。

关键词：混凝土硅树脂氯离子侵蚀碳化性能防水性能

Identification of synapse function related lncRNAs regulated by exposure to inescapable stress and/or learned helplessness

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Identification of synapse function related lncRNAs regulated...

中国神经科学学会第十二届全国学术会议

作者： Cui Chen Chaoqun Li feifei cao Wei Li Nashat Abumaria Institutes of Brain Science Collaborative Innovation Center for Brain Science School of Medicine Fudan University Department of Laboratory Animal Science School of Medicine Fudan University

Objective Depression is a very complex and common mental disease. The exact neuropathological changes underlying depression disorders remain unknown. Long noncoding RNAs（lnc RNAs） are highly expressed in brain, could affect neural stem cell maintenance, neurogenesis, synaptic functions, stress responses and neural plasticity. The present study is the first attempt to explore the possibility that lncRNAs might be involved in depression like pathologies. Methods We used learned helplessness paradigm as a model of depression like symptoms in mice. The pattern of mRNA/lncRNAs expression in hippocampus was determined using RNA sequencing. We applied complex bioinfomatics analysis to do lnc RNAs functional analysis. Results（1） We found that 2163 or 1396 mRNA are different expressed in LH compared with Control or NLH group, 199 or 142 lnc RNAs are different expressed in LH compared with Control or NLH group.（2） We found that the identified lnc RNAs are mediating several cellular functions such as: protein transport, ion transport, mRNA processing, positive regulation of dendritic spine development, negative regulation of neuron projection development and regulation of GTPase activity. Interestingly, there was strong regulation of lnc RNAs related to synapse functions. Conclusion Data show that lnc RNAs could be involved depression like pathologies. Importantly, our results suggest for the first time that the learned helplessness induced reduction in synapse functions might be mediated by lnc RNA dependent mechanisms.

关键词： lncRNAs mice learned helplessness synapse functions

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超高强混凝土节点滞回性能数值模拟系统设计

现代电子技术 2020年第12期43卷 142-144,150页

作者：曹菲菲安徽理工大学安徽淮南232000

传统的混凝土节点滞回性能数值模拟系统存在模拟时间长的问题,因此设计超高强混凝土节点滞回性能数值模拟系统,以解决传统系统存在的问题。系统的硬件部分主要包括数据采集卡、微控制器板和输入输出卡,数据采集卡为系统提供数据采集功能... 详细信息

传统的混凝土节点滞回性能数值模拟系统存在模拟时间长的问题,因此设计超高强混凝土节点滞回性能数值模拟系统,以解决传统系统存在的问题。系统的硬件部分主要包括数据采集卡、微控制器板和输入输出卡,数据采集卡为系统提供数据采集功能,微控制器板为系统提供信号以及交换与检测的功能,输入输出卡主要将采集到的模拟信号转换为数字信号。系统软件部分,首先引入损伤指标模拟超高强混凝土在拉压往复荷载作用下的受力特点,然后建立超高强混凝土材料本构模型,分析混凝土材料本构关系,最后建立混凝土节点滞回性能评价指标,模拟混凝土节点在不同轴向力作用下的滞回性能,以此完成超高强混凝土节点滞回性能数值模拟。实验对比结果表明,此次设计的超高强混凝土节点滞回性能数值模拟系统比传统系统数值模拟时间短,具有一定的实际应用意义。

关键词：超高强混凝土滞回性能数值模拟系统设计信号传输对比验证