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模型差异性混合储能系统建模及功率分配

太阳能学报 2024年第1期45卷 433-441页

作者：桑丙玉杨波李克成陶以彬江苏省储能变流及应用工程技术研究中心(中国电力科学研究院有限公司) 南京210003

该文从锂电池和燃料电池的混合储能特性出发,针对已有文献的拓扑结构,对比选取适用于功率分配的混合储能拓扑模型和建模方法,并在组合过程中通过分析选取最合适的变换方式组成混合储能模型,最后通过仿真验证所提模型可在进行功率分配的... 详细信息

该文从锂电池和燃料电池的混合储能特性出发,针对已有文献的拓扑结构,对比选取适用于功率分配的混合储能拓扑模型和建模方法,并在组合过程中通过分析选取最合适的变换方式组成混合储能模型,最后通过仿真验证所提模型可在进行功率分配的前提下提高储能系统荷电状态偏移,延长储能系统寿命。

关键词：储能系统锂电池质子交换膜燃料电池电池建模功率分配

Design and Optimization of a Hybrid Energy System for Decentralized Heating

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Fluid Dynamics & Materials Processing 2021年第1期17卷 49-70页

作者： ling Cheng Bingqing Guo kecheng li China Electric Power Research Institute Beijing100192China State Key Laboratory of Power Grid Safety and Energy Conservation Beijing100192China School of Environmental Science and Engineering Tianjin UniversityTianjin300350China

The performances of a hybrid energy system for decentralized heating are investigated.The proposed energy system consists of a solar collector,an air-source heat pump,a gas-fired boiler and a hot water tank.A mathematical model is developed to predict the operating characteristics of the system.The simulation results are compared with experimental data.Such a comparison indicates that the model accuracy is sufficient.The influence of the flat plate solar collector area on the economic and energy efficiency of such system is also evaluated through numerical simulations.Finally,this system is optimized using the method of orthogonal design.The results clearly demonstrate that the solar-heat pump-gas combined system is more convenient and efficient than the simple gas system and the heat pump-gas combined system,whereas it is less convenient but more efficient than the solarassisted gas system.

关键词： Hybrid energy system mathematical model system optimization annual performance factor

Vibrational characteristics of rotating soft cylinders

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Science China(Physics,Mechanics & Astronomy) 2021年第5期64卷 34-42页

作者： kecheng li Yinnan Zhang Haifei Zhan Yangkun Du Chaofeng li College of Ciwil Engineering and Architecture Zhejiang UniversiyHangzhou 310058China School of Mathematics and Staristics University of GlasgowGlasgow G128QQUK Key Lab of Soft Machines and Smart Devices of Zhejiang Province Zhejiang UniversiyHangzhou 310027China Soft Matter Research Center Zhejiang University Hangzhou 310027China

Rotating structural components are omnipresent in engineering structures and natural world. This work investigates the effects of the centrifugal and Coriolis forces on the free vibrational characteristics of soft cylinders rotating with respect to the axis of symmetry based on the nonlinear elasticity and linear incremental theories. The formulations indicate that the biasing deformation, instantaneous elastic moduli, and incremental equations of motion strongly depend on the rotating speed. The characteristic equation for the natural frequency is derived using the state-space method and approximate laminate technique.The numerical examples included in this work demonstrate that the centrifugal and Coriolis forces might have significant effects on the vibrational characteristics of the cylinder. Results of this work will benefit the design and control of novel engineering systems with rotating soft cylinders or shafts.

关键词： rotating soft cylinders vibrational characteristics centrifugal force Coriolis force

基于模糊DEMATEL-超效率DEA的可再生能源发电技术综合效益评估方法

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电网技术 2024年第6期48卷 2346-2355,I0032页

作者：李鹏文淼董存桑丙玉王加浩李克成华北电力大学电气与电子工程学院河北省保定市071003 国家电力调度控制中心北京市西城区100031 中国电力科学研究院有限公司江苏省南京市210003

“双碳”目标下,各类可再生能源发电技术发展迅速,综合权衡不同可再生能源发电方案的综合效益对可再生能源的优化设计具有重要意义。综合考虑经济效益、环境效益、能源效益和社会效益4个层面,提出了一种基于模糊决策试验和评价实验(deci... 详细信息

“双碳”目标下,各类可再生能源发电技术发展迅速,综合权衡不同可再生能源发电方案的综合效益对可再生能源的优化设计具有重要意义。综合考虑经济效益、环境效益、能源效益和社会效益4个层面,提出了一种基于模糊决策试验和评价实验(decision making trial and evaluation laboratory,DEMATEL)与超效率数据包络分析(data envelopment analysis,DEA)模型的可再生能源发电技术综合效益评估方法。该方法分为投入-产出指标体系构建和综合评估2个阶段。首先,利用三角直觉模糊数处理模糊评价信息,将其与DEMATEL相结合量化各指标之间相互影响关系,基于指标间逻辑分析结果建立投入-产出评估指标体系。然后,基于超效率DEA模型对各可再生能源发电方案进行评估排序,结合投入冗余和产出不足分析结果给出各方案的针对性改善建议,以期为进一步选择和确定可再生能源产业发展战略提供参考。最后以某省10类可再生能源发电单元为研究对象,基于所提研究方法进行综合评估和分析,并与多准则妥协解排序法和熵权法进行对比分析,验证了所提方法的有效性。

关键词：可再生能源综合效益评估投入-产出评估指标体系决策试验和评价实验三角直觉模糊数超效率数据包络分析

A Symplectic Method of Numerical Simulation on Local Buckling for Cylindrical Long Shells under Axial Pulse Loads

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Structural Durability & Health Monitoring 2021年第1期15卷 53-67页

作者： kecheng li Jianlong Qu Jinqiang Tan Zhanjun Wu Xinsheng Xu State Key Laboratory of Structure Analysis for Industrial Equipment Department of Engineering MechanicsDalian University of TechnologyDalian116024China

In this paper,the local buckling of cylindrical long shells is discussed under axial pulse loads in a Hamiltonian system.Using this system,critical loads and modes of buckling of shells are reduced to symplectic eigenvalues and eigensolutions respectively.By the symplectic method,the solution of the local buckling of shells can be employed to the expansion series of symplectic eigensolutions in this system.As a result,relationships between critical buckling loads and other factors,such as length of pulse load,thickness of shells and circumferential orders,have been achieved.At the same time,symmetric and unsymmetric buckling modes have been discuss.Moreover,numerical results show that modes of post-buckling of shells can be Bamboo node-type,bending type,concave type and so on.Research in this paper provides analytical supports for ultimate load prediction and buckling failure assessment of cylindrical long shells under local axial pulse loads.

关键词： Hamiltonian system symplectic method local buckling buckling analysis cylindrical long shell axial pulse load

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基于激光拍频的高温传感技术研究

传感器与微系统 2024年第4期43卷 25-27页

作者：李冰李克城吴晓阳王芳王旭河南师范大学电子与电气工程学院河南新乡453007

为实现强电磁及其他特殊高温环境的直接温度测量,提出并演示了一种新颖、简单、低成本的光纤高温温度检测系统,该系统利用法布里—珀罗激光二极管(FP-LD)的强反馈来实时检测反射光纤的温度。传感系统由通信用激光光源——FP-LD、光纤环... 详细信息

为实现强电磁及其他特殊高温环境的直接温度测量,提出并演示了一种新颖、简单、低成本的光纤高温温度检测系统,该系统利用法布里—珀罗激光二极管(FP-LD)的强反馈来实时检测反射光纤的温度。传感系统由通信用激光光源——FP-LD、光纤环镜Sagnac和光电探测器(PD)组成。利用该系统实现了温度变化范围为105~1025℃的高温温度传感。实验结果表明,在光纤软化温度内其强反馈拍频信号(BFS)的频率偏移与温度变化呈线性关系,可广泛应用于冶金、航空航天等领域的高温检测。

关键词：强反馈法布里—珀罗激光二极管光纤Sagnac环拍频信号

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Bio-modification of eucalyptus chemithermomechanical pulp

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Frontiers of Chemical Science and Engineering 2008年第1期2卷 28-33页

作者： Qifeng YANG Huaiyu ZHAN Shuangfei WANG kecheng li Shiyu FU State Key Laboratory of Pulp&Paper Engineering South China University of TechnologyGuangzhou 510640China Pulp&Paper Institute of Guangxi University Nanning 530004China Department of Chemical Engineering and limerick Pulp and Paper Centre University of New BrunswickFrecdericton NBCanada

Eucalyptus chemithermomechanical pulp(CTMP)was modified with the white-rot fungus 19-6 in a stationary culture condition.Different factors that influence the effect of white-rot fungus treatment,including additional nutrition,pH value,temperature,treatment time and oxygen input were investigated.The results show that the energy consumption of post refining of CTMP treated by white-rot fungus 19-6 was lower than that of untreated pulp and the strength properties also obviously improved.At a freeness level of about 330 mL,compared to the untreated pulp,the tensile index,tear index and internal bonding strength increased by 21.3%,27.4% and 33.1%,respectively.Unfortunately,the treatment with white-rot fungus substantially decreased all optical properties except for opacity,which was essentially unchanged.Brightness and light scatter-ing coefficient were reduced to as much as 25%and 21%compared to the untreated pulps.However,after a tow-stage“Na_(2)S_(2)O_(4)-H_(2)O_(2)”bleaching,the final brightness can reach 70.3%ISO,which is similar to that of the untreated CTMP.

关键词： eucalyptus CTMP white-rotfungus19-6 bio-modification

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栉孔扇贝壳粉对刚果红的吸附性能研究

海洋科学 2024年第1期48卷 36-43页

作者：王昕葛香云刘元杰李鹏程李克成中国科学院海洋研究所实验海洋生物学重点实验室山东青岛266071 青岛农业大学海洋科学与工程学院山东青岛266237 崂山实验室海洋药物与生物制品功能实验室山东青岛266237

栉孔扇贝是中国养殖量最大的扇贝,其废弃的贝壳资源利用也成为了关注的热点。贝壳粉是一种天然的生物吸附剂,本文通过高温煅烧处理,进一步优化了栉孔扇贝壳的吸附性能,采用扫描电镜分析、红外光谱分析表征手段对其形貌、组成进行分析;... 详细信息

栉孔扇贝是中国养殖量最大的扇贝,其废弃的贝壳资源利用也成为了关注的热点。贝壳粉是一种天然的生物吸附剂,本文通过高温煅烧处理,进一步优化了栉孔扇贝壳的吸附性能,采用扫描电镜分析、红外光谱分析表征手段对其形貌、组成进行分析;同时探讨了不同贝壳粉煅烧温度、反应时间、反应温度、刚果红初始浓度对其吸附性能的影响以及吸附动力学模型和等温吸附模型。结果表明, 900℃下煅烧的贝壳粉吸附性能最好;吸附反应在5 min内迅速发生,在150 min后基本达到平衡;该反应符合准二级吸附动力学过程(R2=0.999 1),吸附等温线符合Freundlich模型,属于多相吸附,低温更有利于刚果红在煅烧栉孔扇贝壳粉上的吸附。以上结果对于解决印染废水的净化处理具有重要意义,也为栉孔扇贝壳废弃资源综合利用奠定理论基础。

关键词：栉孔扇贝贝壳高温煅烧刚果红吸附

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李海松从“神驭精气”辨治遗精经验

中医杂志 2024年第11期65卷 1109-1114页

作者：王润泽李恪丞王继升韩亮陈晔欣黄圣王彬北京中医药大学东直门医院北京市100700 北京中医药大学北京中医药大学房山医院

总结李海松教授从“神驭精气”辨治遗精的临证经验。提出神驭精气观点,强调心神具有统驭人体精气的作用,认为遗精的核心病机为心神妄动、精关不固,治疗主张首重调心神,兼顾调理脏腑精气。临证分型辨治,心神失养型遗精治宜补养心气、养... 详细信息

总结李海松教授从“神驭精气”辨治遗精的临证经验。提出神驭精气观点,强调心神具有统驭人体精气的作用,认为遗精的核心病机为心神妄动、精关不固,治疗主张首重调心神,兼顾调理脏腑精气。临证分型辨治,心神失养型遗精治宜补养心气、养神秘精,自拟养心秘精方;心火亢盛型遗精治宜清心泻火、安神固精,自拟泻心固精方;心肝气郁型遗精治宜疏肝宁心、安神调精,自拟解郁安神调精方(由柴胡疏肝散化裁而来);心脾两虚型遗精治宜补脾养心、安神摄精,自拟心脾同调摄精方(由归脾汤化裁而来);心肾两虚型遗精治宜滋肾宁心、安神固精,自拟心肾两滋填精方(由水陆二仙丹合五子衍宗丸化裁而成)。遣方用药调和脏腑以治本、夑理气血以养神、妙用专药以安神,灵活随症加减。

关键词：遗精心神神驭精气名医经验李海松