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Operation optimization for integrated energy system with energy storage

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Science China(Information Sciences) 2018年第12期61卷 217-219页

作者： fan li Bo SUN Chenghui ZHANG School of Control Science and Engineering Shandong University

Dear editor,The integrated energy system has attracted widespread attention owning to its high energy efficiency, low emission, and reliability [1]. It is a typical cyber-physical integrated energy system (CPIES) that combines information and energy technologies, in which the cyber information platform collects information from the energy plant and controls most of the energy de-

关键词： Operation optimization for integrated energy system with energy storage MINLP GA

Synthesis of 14-epi-19-nor-22-oxa-1α,25-dihydroxyvitamin D_3

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Chinese Chemical Letters 2008年第3期19卷 259-260页

作者： Wei fan li Hai Yong Wu Key Laboratory of Drug Targeting of Education Ministry West China School of Pharmacy Sichuan University Chengdu 610041 China

The synthesis of 14-epi-19-nor-22-oxa-1α,25（OH）2D3 5 was started from diol 8 via Fall＇s method, oxidation, epimerization, protection, coupling with the 19-nor-A-ring 7, and then deprotection of the hydroxyl functi... 详细信息

关键词： 1α,25-Dihydroxyvitamin D3 14-Epi-19-nor-22-oxa-lct,25-dihydroxyvitamin D3 Device Synthesis

Application of GNSS-PPP on Dynamic Deformation Monitoring of Offshore Platforms

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China Ocean Engineering 2024年第2期38卷 352-361页

作者： YU li-na XIONG Kuan GAO Xi-feng li Zhi fan li-long ZHANG Kai Institute of Ocean Energy and Intelligent Construction Tianjin University of TechnologyTianjin 300384China China Railway Construction Bridge Engineering Bureau Group Co.LTD Tianjin 300300China School of Civil Engineering Tianjin UniversityTianjin 300072China Department of Land Surveying and Geo-Informatics The Hong Kong Polytechnic UniversityHong KongChina State Key Laboratory of Precision Blasting Jianghan UniversityWuhan 430056China

The real-time dynamic deformation monitoring of offshore platforms under environmental excitation is crucial to their safe *** Global Navigation Satellite System-Precise Point Positioning(GNSS-PPP)has been considered for this purpose,its monitoring accuracy is relatively ***,the influence of background noise on the dynamic monitoring accuracy of GNSS-PPP remains ***,it is imperative to further validate the feasibility of GNSS-PPP for deformation monitoring of offshore *** address these concerns,vibration table tests with different amplitudes and frequencies are *** results demonstrate that GNSS-PPP can effectively monitor horizontal vibration displacement as low as±30 mm,which is consistent with ***,the spectral characteristic of background noise in GNSS-PPP is similar to that of GNSS-RTK(Real Time Kinematic).Building on this observation,an improved Complete Ensemble Empirical Mode Decomposition with Adaptive Noise(CEEMDAN)has been proposed to de-noise the data and enhance the dynamic monitoring accuracy of *** monitoring application research is also undertaken,successfully extracting and analyzing the dynamic deformation of an offshore platform structure under environmental excitation using GNSS-PPP monitoring in conjunction with improved CEEMDAN *** comparing the de-noised dynamic deformation trajectories of the offshore platform during different periods,it is observed that the platform exhibits reversible alternating vibration responses under environmental excitation,with more pronounced displacement deformation in the direction of load *** research results confirm the feasibility and potential of GNSS-PPP for dynamic deformation monitoring of offshore platforms.

关键词： GNSS-PPP offshore platform dynamic deformation monitoring improved CEEMDAN de-noising

Non-thermal emission from Vela X and PWN G0.9+0.1

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Chinese Journal of Astronomy and Astrophysics 2009年第4期9卷 449-456页

作者： Wei-fan Qiao li Zhang Jun fang Department of Physics Yunnan University Kunming 650091 China

We study the multi-waveband non-thermal emission from the pulsar wind nebulae （PWNe） Vela X and G0.9＋0.1 in the frame of a time-dependent model describing non-thermal radiation from the PWNe. In such a model, the relativistic wind of particles driven by a central pulsar blows into the ambient medium and creates a termination shock that accelerates the particles to very high energy in a PWN. The non-thermal photons in the PWN are produced both by synchrotron radiation and the inverse Compton process, with electrons coming directly from the pulsar magnetosphere and electrons being accelerated at the termination shock. We apply this model to reproduce the observed multi-waveband photon spectra of Vela X and the G0.9＋0.1, both of which have been detected emitting very high energy photons. Our results indicate that TeV photons are produced by the inverse Compton scattering of the high-energy electrons in the infrared photon field in both Vela X and PWN G0.9＋0.1. The TeV photons from these two PWNe may have leptonic origins.

关键词： ISM individual objects Vela X, G0.9 + 0.1-gamma-rays theory

Superhydrophobic melamine sponge prepared by radiation-induced grafting technology for efficient oil-water separation

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Nuclear Science and Techniques 2024年第9期35卷 103-114页

作者： Ying Sun Wen-Rui Wang Dan-Yi li Si-Yi Xu lin lin Man-li Lu Kai fan Chen-Yang Xing lin-fan li Ji-Hao li Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China School of Architecture and Materials Chongqing College of Electronic EngineeringChongqing 401331China Center for Stretchable Electronics and NanoSensors Key Laboratory of Optoelectronic Devices and Systems of Ministry of EducationCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

This paper presents a superhydrophobic melamine(ME)sponge(ME-g-PLMA)prepared via high-energy radiation-induced in situ covalent grafting of long-alkyl-chain dodecyl methacrylate(LMA)onto an ME sponge for efficient oil–water *** obtained ME-g-PLMA sponge had an excellent pore structure with superhydrophobic(water contact angle of 154°)and superoleophilic *** can absorb various types of oils up to 66–168 times its *** ME-g-PLMA sponge can continuously separate oil slicks in water by connecting a pump or separating oil underwater with a gravity-driven *** addition,it maintained its highly hydrophobic properties even after long-term immersion in different corrosive solutions and repeated oil *** modified ME-g-PLMA sponge exhibited excellent separation properties and potential for oil spill cleanup.

关键词： Radiation-induced graft polymerization Oil–water separation Sponge Superhydrophobic

Autonomous-synergic Voltage Security Regions in Bulk Power Systems

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Journal of Modern Power Systems and Clean Energy 2023年第2期11卷 686-692页

作者： fan li Tao Niu lin Xue Yuxiao li Tianen Huang Zhenjie Wu Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqing 400044China Zhejiang University Hangzhou 310058China Grid Hangzhou Power Supply Company Hangzhou 310020China

Determining security/stability boundaries is a common and critical means of preventing cascading failures induced by voltage-related issues,which represents one of the major challenges in bulk power ***,traditional approaches suffer from conservative issues and heavy computational *** address these challenges,the concept of an autonomous-synergic voltage security region(AS-VSR)and the corresponding dynamic constraint coefficient pruning(DCCP)computation method,which fully consider the volt/var characteristics of bulk power systems,are proposed in this *** linearized and nonlinearized robust optimization problems are introduced to obtain accurate *** computational accuracy,time cost,and advantages of autonomous-synergic control are observed in the simulation results.

关键词： Voltage security region cascading failure dynamic constraint coefficient pruning(DCCP) bulk power system robust optimization

Improved response surface method for anti-slide reliability analysis of gravity dam based on weighted regression

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第6期11卷 432-439页

作者： Jian-yun CHEN Qiang XY Jing li Shu-li fan Qiang xu State Key Laboratory of Coastal and Offshore Engineering Daliatz University of Technology Dalian 116023 China School of Civil and Hydraulic Engineering Dalian University of Technology Dalian 116023 China

The aim of this study was to design and construct an improved response surface method(RSM) based on weighted regression for the anti-slide reliability analysis of concrete gravity *** limitation and lacuna of the traditional RSM were briefly ***,based on small experimental points,research was devoted to an improved RSM with singular value decomposition ***,the method was used on the basis of weighted regression and deviation coefficient correction to reduce iteration times and experimental points and improve the calculation method of checking ***,a test example was given to verify this *** with other conventional algorithms,this method has some strong advantages:this algorithm not only saves the arithmetic operations but also greatly enhances the calculation efficiency and the storage efficiency.

关键词： Response surface method(RSM) Reliability Gravity dam Singular value decomposition Weighted regression Deviation coefficient

Thermal Error Compensation of the Wear-Depth Real-Time Detecting of Self-Lubricating Spherical Plain Bearings

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Chinese Journal of Mechanical Engineering 2018年第5期31卷 35-47页

作者： Zhan-Qi Hu Wei li Yu-lin Yang Bing-li fan Hai-li Zhou Aviation Key Laboratory of Science and Technology on Generic Technology of Aviation Self-Lubricating Spherical Plain Bearing Yanshan University

The spherical plain bearing test bench is a necessary detecting equipment in the research process of self?lubricating spherical plain bearings. The varying environmental temperatures cause the thermal deformation of the wear?depth detecting system of bearing test benches and then a ect the accuracy of the wear?depth detecting data. However, few researches about the spherical plain bearing test benches can be found with the implementation of the detect?ing error compensation. Based on the self?made modular spherical plain bearing test bench, two main causes of ther?mal errors, the friction heat of bearings and the environmental temperature variation, are analysed. The thermal errors caused by the friction heat of bearings are calculated, and the thermal deformation of the wear?depth detecting sys?tem caused by the varying environmental temperatures is detected. In view of the above results, the environmental temperature variation is the main cause of the two error factors. When the environmental temperatures rise is 10.3 °C, the thermal deformation is approximately 0.01 mm. In addition, the comprehensive compensating model of the thermal error of the wear?depth detecting system is built by multiple linear regression(MLR) and time series analysis. Compared with the detecting data of the thermal errors, the comprehensive compensating model has higher fitting precision, and the maximum residual is only 1 μm. A comprehensive compensating model of the thermal error of the wear?depth detecting system is proposed, which provides a theoretical basis for the improvement of the real?time wear?depth detecting precision of the spherical plain bearing test bench.

关键词： Self?lubricating spherical plain bearing Wear depth Bearing test bench Thermal error Error compensation

Quantile Trends in Temperature Extremes in China

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Atmospheric and Oceanic Science Letters 2014年第4期7卷 304-308页

作者： fan li-Jun Key Laboratory of Regional Climate-Environment Research for Temperate East Asia (RCE-TEA) Institute of Atmospheric PhysicsChinese Academy of Science

A number of recent studies have examined trends in extreme temperature indices using a linear regression model based on ordinary least-squares. In this study, quantile regression was, for the first time, applied to examine the trends not only in the mean but also in all parts of the distribution of several extreme temperature indices in China for the period 1960–2008. For China as a whole, the slopes in almost all the quantiles of the distribution showed a notable increase in the numbers of warm days and warm nights, and a significant decrease in the number of cool nights. These changes became much faster as the quantile increased. However, although the number of cool days exhibited a significant decrease in the mean trend estimated by classical linear regression, there was no obvious trend in the upper and lower quantiles. This finding suggests that examining the trends in different parts of the distribution of the time-series is of great importance. The spatial distribution of the trend in the 90 th quantile indicated that there was a pronounced increase in the numbers of warm days and warm nights, and a decrease in the number of cool nights for most of China, but especially in the northern and western parts of China, while there was no significant change for the number of cool days at almost all the stations.

关键词： extreme temperature indices quantile trend quantile regression China