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A Novel Rolling and Fractional-ordered Grey System Model and Its Application for Predicting Industrial Electricity Consumption

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Journal of Systems Science and Systems Engineering 2024年第2期33卷 207-231页

作者： wenhao Zhou Hailin li Zhiwei Zhang College of Business Administration Huaqiao UniversityQuanzhou 362021China College of Business Administration Capital University of Economics and BusinessBeijing 100070China

Accurate and reasonable prediction of industrial electricity consumption is of great significance for promoting regional green transformation and optimizing the energy ***,the regional power system is complicated and uncertain,affected by multiple factors including climate,population and *** paper incorporates structure expansion,parameter optimization and rolling mechanism into a system forecasting framework,and designs a novel rolling and fractional-ordered grey system model to forecast the industrial electricity consumption,improving the accuracy of the traditional grey *** optimal fractional order is obtained by using the particle swarm optimization algorithm,which enhances the model ***,the proposed model is employed to forecast and analyze the changing trend of industrial electricity consumption in Fujian *** results show that industrial electricity consumption in Fujian will maintain an upward growth and it is expected to 186.312 billion kWh in *** with other seven benchmark prediction models,the proposed grey system model performs best in terms of both simulation and prediction performance metrics,providing scientific reference for regional energy planning and electricity market operation.

关键词： Electricity consumption grey system theory prediction model fractional order

Defect engineering synergistically modulates power factor and thermal conductivity of CuGaTe2 for ultra-high thermoelectric performance

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Journal of Materials Science & Technology 2022年第33期128卷 213-220页

作者： Zipei Zhang wenhao li Lu Yu Sitong Wei Shikai Wei Zhen Ji Weiyu Song Shuqi Zheng State Key Laboratory of Heavy Oil Processing College of New Energy and MaterialsChina University of PetroleumBeijing 102249China College of Science China University of PetroleumBeijing 102249China

The ternary chalcopyrite CuGaTe_(2)has emerged as a promising p-type thermoelectric material with its advantages of low cost,good stability,and non-toxic ***,its thermoelectric performance is limited by the intrinsic low electrical conductivity and high lattice thermal *** this work,A deficiency of Cu in Cu_(1–x)Ga Te_(2)semiconductors can be used to optimize the electrical properties by improving the carrier concentration and to reduce thermal conductivity through multi-scale phonon scattering,which is predicted and guided by the First-principles density functional theory *** carrier concentration is increased to 1020,which compensates for the low electrical performance caused by the intrinsic low nHof CuGaTe_(2).The average power factor of Cu_(0.96)Ga Te_(2)reaches 106.3%higher than that of the original CuGaTe_(2).In addition,the lattice thermal conductivity of the defective samples is greatly reduced at high temperatures,which is mainly due to the reduction of sound speed and phonon *** the above factors contribute to the highest dimensionless figure of merit(ZT)value of 1.23 at 823 K in Cu_(0.96)GaTe_(2),which is 114%higher than the pristine CuGaTe_(2),and the average ZT is 171.4%higher.

关键词： Thermoelectric CuGaTe_(2) Carrier concentration Thermal conductivity

水轮发电机引风板端部合缝采用绑绳绑扎试验与研究

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上海大中型电机 2024年第2期 30-33页

作者：任天明李文浩郑策段伟赞哈尔滨电机厂有限责任公司哈尔滨150040

引风板是发电机的重要部件,用于减少气隙轴向两端漏风,是发电机通风系统的重要组成部分。本文针对国内某电站引风板合缝螺栓掉落事件,对绑绳绑扎结构进行研究,并通过实验取得绑绳材料的力学性能,验证了绑扎结构的可行性,对类似水轮发电... 详细信息

引风板是发电机的重要部件,用于减少气隙轴向两端漏风,是发电机通风系统的重要组成部分。本文针对国内某电站引风板合缝螺栓掉落事件,对绑绳绑扎结构进行研究,并通过实验取得绑绳材料的力学性能,验证了绑扎结构的可行性,对类似水轮发电机引风板端部合缝处固定的设计提供参考思路。

关键词：水轮发电机引风板合缝

Electron modulation by atomic Ir site decoration in porous Co/N co-doped carbon for electrocatalytic hydrogen evolution

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Nano Research 2023年第2期16卷 2011-2019页

作者： Youkui Zhang Zitong Yan Yeli Gao Yaqin Fu wenhao li Yunxiang lin Chuanqiang Wu Yujuan Pu Tao Duan li Song State Key Laboratory of Environment-Friendly Energy Materials National Co-Innovation Center for Nuclear Waste Disposal and Environmental SafetySouthwest University of Science and TechnologyMianyang 621010China National Synchrotron Radiation Laboratory Chinese Academy of Sciences(CAS)Center for Excellence in NanoscienceUniversity of Science and Technology of ChinaHefei 230029China Institute of Physical Science and Information Technology School of Materials Science and EngineeringAnhui Key Laboratory of Information Materials and DevicesKey Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationAnhui UniversityHefei 230601China College of Chemistry and Chemical Engineering Chongqing UniversityChongqing 401331China

The rational design of materials at atomic scale as efficient and stable electrocatalysts for hydrogen evolution reaction(HER)is critical for energy ***,we report a novel hybrid nanostructure with iridium(Ir)and cobalt(Co)atomic pair configuration anchored in porous nitrogen-doped carbon(pNC)nanosheets(denoted as IrCo-pNC)for electrocatalytic *** investigations and theoretical calculations reveal that the interaction between Ir and Co species in pNC promotes electron accumulation and depletion around isolated Ir and Co atoms,respectively,resulting in a local asymmetry electron density *** functional theory calculations also suggest that the electrons transfer from Co to adjacent Ir atom causing the down shift of the d-band center of Ir 5d in IrCo-pNC catalyst,thus optimizing the adsorption of hydrogen on Ir *** as-prepared IrCo-pNC exhibits significant HER performance with an overpotential of 21 mV to achieve a current density of 10 mA·cm^(−2)in 0.5 M *** work provides insight into the role of asymmetry electron density distribution in nanomaterials in regulating HER electrocatalysis.

关键词： electron modulation iridium decoration porous carbon electrocatalysis hydrogen evolution reaction

A deep learning model enabled multi-event recognition for distributed optical fiber sensing

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Science China(Information Sciences) 2024年第3期67卷 291-307页

作者： Yujiao li Xiaomin CAO wenhao NI Kuanglu YU Institute of Information Science School of Computer and Information TechnologyBeijing Jiaotong University Beijing Key Laboratory of Advanced Information Science and Network Technology Beijing Jiaotong University

Fiber optic sensors that utilize backscattered light offer distributed real-time measurements and have been seen tremendous improvements in sensing distance and spatial resolution over the last ***, these improvements in sensor capabilities lead to a significant increase in the amount of data that needs to be processed. Traditional processing schemes are no longer adequate, so the development of novel signal processing methods is critical. Phase-sensitive optical time domain reflectometry(Φ-OTDR) is now applied in various applications for multi-event recognition, and it would usually be difficult, sometimes even unrealistic to label all the acquired samples due to its real-time and seamless monitoring nature. To fully take advantage of the information contained within the large number of unlabeled samples, which were formerly not utilized and hence wasted, we propose a semi-supervised model to boost the event classification performance of Φ-OTDR. The model extracts respectively the temporal features and the spatial bidirectional features together with a dual attention mechanism. Its classification accuracy has been improved up to 96.9%with only 1230 labeled samples. In addition, our model shows significant advantages when the number of labeled samples is reduced. Importantly, our method improves the accuracy of multi-event classification without any modification to the optical setup.

关键词： $\Phi$-OTDR event recognition semi-supervised learning mean teacher MT-ACNN-SA-BiLSTM

Superb VOCs capture engineering carbon adsorbent derived from shaddock peel owning uncompromising thermal-stability and adsorption property

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Chinese Journal of Chemical Engineering 2022年第7期35卷 120-133页

作者： Fu Yang wenhao li Rui Ou Yutong Lu Xuexue Dong Wenlong Tu Wenjian Zhu Xuyu Wang Lulu li Aihua Yuan Jianming Pan School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang 212013China Jiangsu Agricultural Hormone Engineering Technology Research Center Co.LTD Changzhou 213022China

High applied thermal-stability and superior structural property for activated carbon adsorbent are extremely promising,which also is the determining short slab in volatile organic compounds(VOCs)adsorption ***,we develop the outstanding engineering carbon adsorbents from waste shaddock peel which affords greatly-enhanced thermal-stability and super structural property(S_(Lang)=4962.6 m2·g^(-1),Vmicro=1.67 cm^(3)·g^(-1)).Such character endows the obtained adsorbent with ultrahigh adsorption capture performance of VOCs specific to benzene(16.58 mmol·g^(-1))and toluene(15.50 mmol·g^(-1),far beyond traditional zeolite and activated carbon even MOFs *** structural expression characters were accurately correlated with excellent adsorption efficiency of VOCs by studying synthetic factor-controlling comparative ***,adsorption selectivity prediction at different relative humidity was demonstrated through DIH(difference of the isosteric heats),exceedingly highlighting great superiority(nearly sixfold)in selective adsorption of toluene compared to volatile *** findings provide the possibility for practical industrial application and fabrication of waste biomass-derived outstanding biochar adsorbent in the environmental treatment of threatening VOCs pollutants.

关键词： Thermal-stability Carbon absorbent VOCs Shaddock peel Capture

制动装置推出刚度对轨道交通车辆振动性能的影响

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城市轨道交通研究 2024年第6期27卷 49-53页

作者：刘寅虎唐永明杨震寰高浩李文豪曹云丽南京中车浦镇海泰制动设备有限公司南京210031 北京交通大学机械与电子控制学院北京100044 西南交通大学轨道交通运载系统全国重点实验室成都610031

[目的]电机械制动是采用电机控制丝杆驱动,实现推杆的推出动作使闸瓦与车轮接触,完成制动力传递与摩擦制动的一种制动方式。需要研究这种新型制动方式对轨道交通车辆振动性能的影响。[方法]介绍了电机械制动器和空气制动器的基本结构组... 详细信息

[目的]电机械制动是采用电机控制丝杆驱动,实现推杆的推出动作使闸瓦与车轮接触,完成制动力传递与摩擦制动的一种制动方式。需要研究这种新型制动方式对轨道交通车辆振动性能的影响。[方法]介绍了电机械制动器和空气制动器的基本结构组成,并对两种制动器进行了推出刚度测试和线路振动试验测试,分析了制动器推出刚度对车辆颤振的影响。[结果及结论]刚度测试发现,因电机械制动器采用了电机驱动方式,未采用空气制动器的气孔活塞,故电机械制动器的推出刚度在常工作区内远大于空气制动器且存在非线性特征。在制动器装车后的线路试验中发现,与装用空气制动器相比,装用具有大推出刚度的电机械制动器会加剧车辆的制动颤振现象,其关键部件的振动加速度也会增大。综合各项研究结果,建议降低电机械制动器的推出刚度,保证车辆实现平稳安全的制动过程。

关键词：轨道交通车辆振动性能推出刚度振动传递

Lack of ethylene does not affect reproductive success and synergid cell death in Arabidopsis

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Molecular Plant 2022年第2期15卷 354-362页

作者： wenhao li Qiyun li Mohan Lyu Zhijuan Wang Zihan Song Shangwei Zhong Hongya Gu Juan Dong Thomas Dresselhaus Sheng Zhong li-Jia Qu State Key Laboratory for Protein and Plant Gene Research Peking-Tsinghua Center for Life Sciences at College of Life SciencesPeking UniversityBeijing 100871People's Republic of China The National Plant Gene Research Center(Beijing) Beijing 100101People's Republic of China The Waksman Institute of Microbiology Rutgers the State University of New JerseyPiscatawayNJ 08854USA Cell Biology and Plant Biochemistry University of Regensburg93053 RegensburgGermany

The signaling pathway of the gaseous hormone ethylene is involved in plant reproduction,growth,devel-opment,and stress *** reproduction,the two synergid cells of the angiosperm female gametophyte both undergo programmed cell death(PCD)/degeneration but in a different manner:PCD/degeneration of one synergid facilitates pollen tube rupture and thereby the release of sperm cells,while PCD/degeneration of the other synergid blocks supernumerary pollen *** signaling was postu-lated to participate in some of the synergid cell functions,such as pollen tube attraction and the induction of PCD/***,ethylene-mediated induction of synergid PCD/degeneration and the role of ethylene itself have not been firmly ***,we employed the CRISPR/Cas9 technology to knock out the five ethylene-biosynthesis 1-aminocyclopropane-1-carboxylic acid oxidase(ACO)genes and created Arabidopsis mutants free of ethylene *** ethylene-free mutant plants showed normal triple responses when treated with ethylene rather than 1-aminocyclopropane-1-carboxylic acid,but had increased lateral root density and enlarged petal sizes,which are typical phenotypes of mutants defective in ethylene *** these ethylene-free plants,we further demonstrated that production of ethylene is not necessarily required to trigger PCD/degeneration of the two synergid cells,but certain com-ponents of ethylene signaling including transcription factors ETHYLENE-INSENSITIVE 3(EIN3)and EIN3-liKE 1(EIL1)are necessary for the death of the persistent synergid cell.

关键词： ethylene ACC PCD synergid cells triple response Arabidopsis

Constructing Bidirectional Fluorine-Rich Electrode/Electrolyte Interphase Via Solvent Redistribution toward Long-Term Sodium Battery

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Energy & Environmental Materials 2023年第6期6卷 455-462页

作者： Xinxin Zhao Zhenyi Gu Jinzhi Guo Xiaotong Wang Haojie liang Dan Xie wenhao li Wanqing Jia Xinglong Wu Faculty of Chemistry Northeast Normal UniversityChangchun 130024China MOE Key Laboratory for UV light-Emitting Materials and Technology Northeast Normal UniversityChangchun 130024China Key Laboratory of Physics and Technology for Advanced Batteries(Ministry of Education) State Key Laboratory of Superhard MaterialsCollege of PhysicsJilin UniversityChangchun 130012China

The high concentration electrolytes with specific solvation structure could passivate the electrodes to prolong battery cycle life but at the expense of increased cost,which limits the wide application in *** regular concentration(1_(M))electrolytes with suitable properties(viscosity,ionic conductivity,etc.)are cost-guaranteed,but undesired reactions would always occur and lead to battery degradation during long *** promote the long-term cycle stability in a cost-effective way,this work constructs bidirectional fluorine-rich electrode/electrolyte interphase(EEI)by redistribution of solvents and electrochemical *** fluorinated effect with reasonable zoning planning restricts morphological disintegration,meanwhile,forms spatial confinement on *** particular,the obtained cathode electrolyte interphase(CEI)gets the ample ability of Na^(+)transport,which benefits from the fluorinated organics arranged in the epitaxy and the hemi-carbonate content acting on the ***,the electrochemical long cycling performance of F-NVPOFⅡF-CC full cells is significantly enhanced(the decay rate at 1 C per cycle is as low as 0.01%).Such a fluorine-rich EEI engineering is expected to take transitional layers against the degradation of cells and make ultra-long cycle batteries possible.

关键词： electrolyte/electrode interphase fluoroethylene carbonate interphase regulation organic fluorinated species sodium ion batteries