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Bi-Level Bidding and Multi-Energy retail Packages for Integrated Energy Service Providers Considering Multi-Energy Demand Elasticity

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CSEE Journal of Power and Energy Systems 2024年第4期10卷 1761-1774页

作者： Xun Dou jun Wang Qinran Hu yang Li College of Electrical Engineering and Control Science Nanjing Tech UniversityNanjing 211816China School of Electrical Engineering Southeast UniversityNanjing 210096China

How to effectively use the multi-energy demand elasticity of users to bid in the multi-energy market and formulate multi-energy retail packages is an urgent problem which needs to be solved by integrated energy service providers(IESPs)to attract more users and reduce operating *** paper presents a unified clearing of electricity and natural gas based on a bi-level bidding and multi-energy retail price formulation method for IESPs considering multi-energy demand ***,we propose an operating structure of IESPs in the wholesale and retail energy *** multi-energy demand elasticity model of retail-side users and a retail price model for electricity,gas,heat and cooling are ***,a bi-level bidding model for IESPs considering multi-energy demand elasticity is established to provide IESPs with wholesale-side bidding decisions and retail-side energy retail price ***,an example is given to verify the proposed *** results show that the method improves the total social welfare of the electricity and natural gas markets by 7.99%and the profit of IESPs by 1.40%.It can reduce the variance of the electricity,gas,and cooling load curves,especially the reduction of the variance of the electricity load curve can which reach 79.90%.It can be seen that the research in this paper has a positive effect on repairing the limitations of integrated energy trading research and improving the economics of the operation of IESPs.

关键词： Bi-level bidding integrated energy service providers multi-energy demand elasticity multi-energy retail packages unified clearing of electricity and natural gas

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Convergence and stability of the Newton-Like algorithm with estimation error in optimization flow control

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Journal of Systems Engineering and Electronics 2007年第3期18卷 591-597页

作者： yang jun Li Shiyong Long Chengnian Guan Xinping Coll. of Science Yanshan Univ.Qinhuangdao 066004 P. R. China Mathematics research Center in Hebei Province Shijiazhuang 050000 P. R. China School of Electronics and Information Engineering Beijing Jiaotong Univ. Beijing 100044 P. R. China Inst. of Electrical Engineering Yanshan Univ. Qinhuangdao 066004 P. R. China

The Newton-Like algorithm with price estimation error in optimization flow control in network is analyzed. The estimation error is treated as inexactness of the gradient and the inexact descent direction is analyzed. Based on the optimization theory, a sufficient condition for convergence of this algorithm with bounded price estimation error is obtained. Furthermore, even when this sufficient condition doesn＇t hold, this algorithm can also converge, provided a modified step size, and an attraction region is obtained. Based on Lasalle＇s invariance principle applied to a suitable Lyapunov function, the dynamic system described by this algorithm is proved to be global stability if the error is zero. And the Newton-Like algorithm with bounded price estimation error is also globally stable if the error satisfies the sufficient condition for convergence. All trajectories ultimately converge to the equilibrium point.

关键词： flow control Newton-Like algorithm convergence global stability optimization Lyapunov function.

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Insight into Neuroethical Considerations of the Newly Emerging Technologies and Techniques of the Global Brain Initiatives

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Neuroscience Bulletin 2023年第4期39卷 685-689页

作者： Christopher r.Wood Yongmei Xi Wei-jun yang Hao Wang MOE Laboratory of Biosystem Homeostasis and Protection College of Life SciencesZhejiang UniversityHangzhou310058China Institute of Genetics Zhejiang Provincial Key Laboratory of Genetic and Developmental DisordersZhejiang University School of MedicineHangzhou310058China Department of Neurobiology and Department of Neurosurgery of Second Affiliated Hospital Key Laboratory for Biomedical Engineering of Education MinistryZhejiang University School of MedicineHangzhou310058China NHC and CAMS Key Laboratory of Medical Neurobiology Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological DiseasesMOE Frontier Science Centre for Brain Research and Brain Machine IntegrationSchool of Brain Science and Brain MedicineZhejiang UniversityHangzhou310058China

Introduction At the rock face of neurobiology stand seven global brain *** them,much of the global funding for neuroscience and neurotechnology(over 9 billion USD)is being channeled,and the rapid development of new techniques and technologies is the *** ethicists have questioned the sufficiency of the pre-existing ethical and legal frameworks to provide adequate oversight for such rapidly-emerging neurotechnologies and their often-unique applications and implications.

关键词： legal ethical funding

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Use of a coded voltage signal for cable switching and fault isolation in cabled seafloor observatories

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Frontiers of Information Technology & Electronic Engineering 2018年第11期19卷 1328-1339页

作者： Zhi-feng ZHANG Yan-hu CHEN De-jun LI Bo JIN Can-jun yang jun WANG State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang University

Cabled seafloor observatories play an important role in ocean exploration for its long-term, real-time, and in-situ observation characteristics. In establishing a permanent, reliable, and robust seafloor observatory, a highly reliable cable switching and fault isolation method is essential. After reviewing the advantages and disadvantages of existing switching methods, we propose a novel active switching method for network configuration. Without additional communication path requirements, the switching method provides a way to communicate with a shore station through an existing power transmission path. A coded voltage signal with a distinct sequence is employed as the communication medium to transmit commands. The analysis of the maximum bit frequency of the voltage signals guarantees the accuracy of command recognition. A prototype based on the switching method is built and tested in a laboratory environment, which validated the functionality and reliability of the method.

关键词： Cabled seafloor observatories Cable switching and fault isolation Coded voltage signal Maximum bit frequency

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Developing a power monitoring and protection system for the junction boxes of an experimental seafloor observatory network

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Frontiers of Information Technology & Electronic Engineering 2015年第12期16卷 1034-1045页

作者： jun WANG De-jun LI Can-jun yang Zhi-feng ZHANG Bo JIN Yan-hu CHEN State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang University

A power monitoring and protection system based on an embedded processor was designed for the junction boxes(JBs) of an experimental seafloor observatory network in China. The system exhibits high reliability, fast response, and high real-time performance. A two-step power management method which uses metal-oxide-semiconductor field-effect transistors(MOSFETs) and a mechanical contactor in series was adopted to generate a reliable power switch, to limit surge currents and to facilitate automatic protection. Grounding fault diagnosis and environmental monitoring were conducted by designing a grounding fault detection circuit and by using selected sensors, respectively. The data collected from the JBs must be time-stamped for analysis and for correlation with other events and data. A highly precise system time, which is necessary for synchronizing the times within and across nodes, was generated through the IEEE 1588(precision clock synchronization protocol for networked measurement and control systems) time synchronization method. In this method, time packets were exchanged between the grandmaster clock at the shore station and the slave clock module of the system. All the sections were verified individually in the laboratory prior to a sea trial. Finally, a subsystem for power monitoring and protection was integrated into the complete node system, installed in a frame, and deployed in the South China Sea. results of the laboratory and sea trial experiments demonstrated that the developed system was effective, stable, reliable, and suitable for continuous deep-sea operation.

关键词： Power monitoring and protection Embedded processor Seafloor observatory network IEEE 1588 junction boxes

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Effects of Time-Delay on Intracellular Ca^(2+) Concentration Oscillations

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Chinese Physics Letters 2001年第5期18卷 695-697页

作者： YING yang-jun HUANG Zu-Qia Institute of Low Energy Nuclear Physics Beijing Normal UniversityBeijing 100875 Institute of Applied Physics and Computational Mathematics P.O.Box 8009Beijing 100088

Based on SS-model[Somogyi r and Stucki J W ***.266(1991)11068]for the generation of intracellular Ca^(2+)concentration oscillations,we consider a time-delay for the binding kinetics of the Ca^(2+)channel and find a significant phenomenon that the oscillation takes two quite different modes when a parameter of the system across a *** is a quick oscillation mode and the other is a slow oscillation *** are different from each other on oscillation frequencies for more than ten *** change of oscillation form with parameters and its critical behaviour are illustrated by numerical simulation results.

关键词： oscillation kinetics behaviour

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Dependence of dielectric properties on BT particle size in EP/BT composites

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rare Metals 2006年第Z2期25卷 250-254页

作者： yang Xiaojun yang Zhimin MAO Changhui DU jun Advanced Electronic Materials Institute General Research Institute for Nonferrous Metals Beijing 100088 China Advanced Electronic Materials Institute General Research Institute for Nonferrous Metals Beijing 100088 China Advanced Electronic Materials Institute General Research Institute for Nonferrous Metals Beijing 100088 China Advanced Electronic Materials Institute General Research Institute for Nonferrous Metals Beijing 100088 China

The polymer-ceramic composites of epoxy resin (EP) and barium titanate (BT) were prepared. BT powders of different BT particle sizes from 100 nm to 1 μm were used in the preparation. The dielectric properties, such as dielectric constant, dielectric loss and electrical breakdown strength, of the EP/BT composites were studied. The morphology of the composites was characterized by the means of scanning electron microscopy (SEM). The results show that the dielectric constant of the composites is much higher than the epoxy matrix at frequency range from 1 kHz to 10 MHz, and it is also obviously dependent on the size of BT particles. The electrical breakdown strength of the composites decreases with the increase of the BT content. The dependence of electrical breakdown strength on BT particle sizes was also discussed.

关键词： dielectric property barium titanate (BT) EP/BT composites

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Calculation of effective point reactor kinetic parameters combined with the Galerkin finite element method

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Nuclear Science and Techniques 2020年第7期31卷 65-75页

作者： Bao-Xin Yuan Wan-Kui yang Song-Bao Zhang Bin Zhong jun-Xia Wei yang-jun Ying Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Institute of Applied Physics and Computational Mathematics Beijing 100094China

Precise point reactor kinetic parameters are essential in the study of reactor *** reactor kinetic parameters include the effective delayed neutron fraction and prompt neutron *** this work,effective point reactor kinetic parameters,which can be applied to unstructured grids,were calculated based on the Galerkin finite element ***,two-dimensional and three-dimensional benchmarks were used to verify the calculation of steady-state neutronic ***,the Tehran research reactor core was divided into hexahedral meshes,and the forward flux and adjoint flux were ***,the effective point reactor kinetic parameters of the Tehran research reactor were obtained by comprehensively processing the steady-state neutronic parameters.

关键词： parameters element prompt

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Stability of Spike Solutions to the Fractional Gierer-Meinhardt System in a One-Dimensional Domain

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Numerical Mathematics(Theory,Methods and Applications) 2022年第4期15卷 938-989页

作者： Daniel Gomez jun-Cheng Wei Wen yang Department of Mathematics University of PennsylvaniaPhiladelphiaPA USA Department of Mathematics The University of British ColumbiaVancouverBC Canada Wuhan Institute of Physics and Mathematics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071P.R.China

In this paper we consider the existence and stability of multi-spike solutions to the fractional Gierer-Meinhardt model with periodic boundary *** particular we rigorously prove the existence of symmetric and asymmetric twospike solutions using a Lyapunov-Schmidt *** linear stability of these two-spike solutions is then rigorously analyzed and found to be determined by the eigenvalues of a certain 2×2 *** rigorous results are complemented by formal calculations of N-spike solutions using the method of matched asymptotic *** addition,we explicitly consider examples of one-and two-spike solutions for which we numerically calculate their relevant existence and stability *** considering a one-spike solution we determine that the introduction of fractional diffusion for the activator or inhibitor will respectively destabilize or stabilize a single spike solution with respect to oscillatory ***,when considering two-spike solutions we find that the range of parameter values for which asymmetric two-spike solutions exist and for which symmetric two-spike solutions are stable with respect to competition instabilities is expanded with the introduction of fractional inhibitor *** our calculations indicate that asymmetric two-spike solutions are always linearly unstable.

关键词： Gierer-Meinhardt system eigenvalue stability fractional Laplacian localized solution

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Variation in glucosinolates in pak choi cultivars and various organs at different stages of vegetative growth during the harvest period

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第4期14卷 309-317页

作者： Biao ZHU Jing yang Zhu-jun ZHU Department of Horticulture Zhejiang University School of Agricultural and Food Science Zhejiang Agricultural & Forestry University

Glucosinolates(GSs) play an important role in plant defense systems and human *** investigated the content and composition of GSs in the shoots and roots of seven cultivars of pak *** found that 'Si Yue Man' had the highest total and aliphatic GS contents in the shoots and the highest benzenic GS content in the roots,'Shanghai Qing' contained the highest amounts of benzenic and total GS contents in the roots,while 'Nanjing Zhong Gan Bai' had the lowest benzenic,indole,and total GS contents in both the shoots and ***,the 'Si Yue Man' cultivar appears to be a good candidate for future *** between the shoots and roots was also examined,and a significant correlation among the total,aliphatic,and some individual GSs was found,which is of value in agricultural *** concentrations of the leaf,petiole,and root increased dramatically during the period of rapid growth of the dry matter of the plant 10 to 20 d after transplantation,reaching peak values on Day 20 and decreasing on Day *** conclude that the pak choi should be harvested and consumed from 20 to 25 d after transplantation to take advantages of the high GS content in the plant.

关键词： Glucosinolate Pak choi Cultivar Organ Growth stage

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