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Three-phase Four-wire Interlinking Converter with Enhanced Power Quality Improvement in Microgrid Systems

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CSEE Journal of Power and Energy Systems 2021年第5期7卷 1064-1077页

作者： jiannan liu Seyedfoad Taghizadeh Junwei Lu M.J.Hossain Sascha Stegen Hui Li School of Engineering and Built Environment Griffith UniversityBrisbane 4111Australia Schhool of Engineering Macquaire UniversitySydney 2109Australia. School of Electrical and Data Engineering University of Technology SydneySydney 2007Australia Shanghai Engineering Research Center of Intelligent Management and Control for Power Process Shanghai University of Electric PowerShanghai 200090China.

This paper presents an advanced three-phase four-wire interlinking niicrogrid system with an improved harmonics reduction *** to their robustness and simplicity features,time-domain second-order notch-filter equivalent techniques have drawn a great deal of research ***,the drawbacks of non-satisfactory harmonics rejection characteristics and dynamic response limits their *** this context,this paper proposes an advanced control system with an enhanced harmonics reduction feature for microgrid *** proposed control system exhibits a superior harmonics reduction feature and better dynamic response than the conventional notch-filter based *** addition,a control scheme is developed for a three-phase power system application which presents higher accuracy in compensating both balanced and unbalanced *** performance of the proposed system is validated through simulations and tested on the hardware of a real microgrid *** the results,it is evident that the proposed approach provides excellent performance in terms of harmonics reduction in microgrid systems.

关键词： Grid-connected microgrid harmonics reduction notch filter power management

Off-line parameter estimation for linear control valve with hysteresis 36

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Off-line parameter estimation for linear control valve with ...

第36届中国控制会议

作者： jiannan liu Liang Li Huaqing Wan The No.719 Research Institute of CSIC National Lab of Science and Technology on Steam Power for NS

ISBN: (纸本)9781538629185

The problem of estimating parameters of linear control valve with hysteresis is *** hysteretic behavior of control valve,which is modelled as a switched linear model,is identified by a subspace decomposition *** spectral clustering on subspace,the noisy data of control valve are classified into separate sets,each corresponding to up-trip mode and down-trip mode *** least squares technique is used to estimate the parameters of control *** is shown that the proposed technique exactly estimates the parameters and switching epochs in absence of noise and exhibits dominant advantage in noisy scenario.

关键词： Linear control valve Hysteresis Switched linear model Parameter estimation Fluid prediction

Occlusion guided mandible reconstruction using vascularized fibular flap

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Occlusion guided mandible reconstruction using vascularized ...

第十四次中国口腔颌面外科学术会议

作者： jiannan liu Shanghai Ninth People’s Hospital Shanghai JiaoTong University School of Medicine

Composite mandibular defect results in significant functional and cosmetic *** fibula flap was known as the workhorse flap for mandibular *** its many advantages,the low vertical height of the fibula is a potential dr...

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Auxiliary Diagnosis of Papillary Thyroid Carcinoma Based on Spectral Phenotype

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Phenomics 2023年第5期3卷 469-484页

作者： Bailiang Zhao Yan Wang Menghan Hu Yue Wu jiannan liu Qingli Li Min Dai Wendell QSun Guangtao Zhai Shanghai Key Laboratory of Multidimensional Information Processing East China Normal UniversityShanghai 200241China School of Health Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Pathology The Second People’s Hospital of WuhuWuhu 241000AnhuiChina Ophthalmology Department Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 610101China Department of Oral Maxillofacial Head Neck Oncology Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200011China Institute of Image Communication and Information Processing Shanghai Jiao Tong UniversityShanghai 200240China

Thyroid cancer,a common endocrine malignancy,is one of the leading death causes among endocrine *** diagnosis of pathological section analysis suffers from diagnostic delay and cumbersome operating ***,we intend to construct the models based on spectral data that can be potentially used for rapid intraoperative papillary thyroid carcinoma(PTC)diagnosis and characterize PTC *** alleviate any concerns pathologists may have about using the model,we conducted an analysis of the used bands that can be interpreted pathologically.A spectra acquisition system was first built to acquire spectra of pathological section images from 91 *** obtained spectral dataset contains 217 spectra of normal thyroid tissue and 217 spectra of PTC *** data of the corresponding patients were collected for subsequent model interpretability *** experiment has been approved by the Ethics Review Committee of the Wuhu Hospital of East China Normal *** spectral preprocessing method was used to process the spectra,and the preprocessed signal respectively optimized by the first and secondary informative wavelengths selection was used to develop the PTC detection *** PTC detection model using mean centering(MC)and multiple scattering correction(MSC)has optimal performance,and the reasons for the good performance were analyzed in combination with the spectral acquisition process and composition of the test *** model interpretable analysis,the near-ultraviolet band selected for modeling corresponds to the location of amino acid absorption peak,and this is consistent with the clinical phenomenon of significantly lower amino acid concentrations in PTC ***,the absorption peak of hemoglobin selected for modeling is consistent with the low hemoglobin index in PTC *** addition,the correlation analysis was performed between the selected wavelengths and the clinical data,and the results show:the ref

关键词： Interpretable pathologic model Pathological analysis Intraoperative detection Spectral phenotype

Design and Implementation of a Project Management System Based on Product Data Management on the Baidu Cloud Computing Platform

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国际计算机前沿大会会议论文集 2015年第B12期 37-38页

作者： Shenghai Qiu Yunxia Wang Wenwu Jin jiannan liu Department of Mechanical Engineering Nanjing Institute of TechnologyNanjing 211167JiangsuChina

Aiming at enterprises without commercial project management systems(PMS)in a product data management(PDM)environment,and using a cloud computing platform,this research analyses the business process and function of complex product project management in PDM,and proposes a PMS-based organizational structure for such a *** model consists of a task view,user view,role view,and product *** addition,it designs the function structure,E-R model and logical model of a PMS database,and also presents an architecture based on the Baidu cloud platform,describes the functions of the Baidu App Engine(BAE),establishes the overall PMS software ***,it realizes a revised product design project by using EasyUI,J2EE and other related *** shows that the PMS designed for PDM has availability,scalability,reliability and security with the help of the Baidu cloud computing *** can provide a reference for small-and medium-sized enterprises seeking to implement information systems with high efficiency and at low cost in the age of big data.

关键词： PDM PMS Cloud computing Big data BAE

Event-triggered Based Rolling Optimization in a Microgrid under Uncertainties

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Event-triggered Based Rolling Optimization in a Microgrid un...

第30届中国控制与决策会议

作者： Guanguan Li jiannan liu Bingying Zhang Qiqiang Li Institute of Marine Science and Technology Shandong University School of Control Sciences and Engineering Shandong University

This paper introduces a scheduling method based on event-triggered rolling optimization to realize operation optimization of a microgrid. An event occurs when deviation of real-time values and predictive values exceed a predetermined range. Under this approach, an aperiodic rolling window is utilized to deal with immense volatility of a microgrid caused by weather condition, demand profile and time-of-use power price. Besides, in pursuit of accuracy of solutions, short time interval also increases computational burden. Continuous scheduling periods are incorporated into a rolling window to improve computational efficiency if there are no events. Simulation results show that the eventtriggered rolling optimization method reduces the total operation cost and the number of iterations of operation under uncertainties. Moreover, the proposed method makes a trade-off between effectiveness of the algorithm and optimality of the scheduling.

关键词： Microgrid Event Rolling Optimization Scheduling Operation

Identification of Steam-driven Centrifugal Pump System

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Identification of Steam-driven Centrifugal Pump System

第30届中国控制与决策会议

作者： Liang Li jiannan liu Wei Zheng Huaqing Wan The No.719 Research Institute of CSIC National Lab of Science and Technology on Steam Power for NS

This paper deals with the mathematical model of a steam-driven centrifugal pump system, which consists of steam control valve, turbine and centrifugal pump. The identification process combines mechanism modelling and data modelling, namely, the model structure is derived by the physical mechanism of the system, and the unknown parameters of model structure are estimated by Total least Squares（TLS）. Using the operation data of physical system, the validity of the proposed model and its parameter estimation method are verified. The calculation results shows that the proposed model can well interpret and predict the state of real system.

关键词： Steam-driven Pump Non-linear Dynamic Model System Identification Total Least Squares

常压塔常二中抽出/返回位置对换热网络的影响分析

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炼油技术与工程 2021年第7期51卷 54-56,72页

作者：刘建楠中石化广州工程有限公司广东省广州市510620

以某千万吨级炼油厂的常压塔为研究对象,使用PROⅡ和i-HEAT软件,考察常压塔中段抽出位置对换热网络的影响。结果表明:常二中的抽出/返回位置下移至与常三线相同的抽出位置时,取热温度提高了12℃,取热量增加了9.3 MW,经济夹点温差下的换... 详细信息

以某千万吨级炼油厂的常压塔为研究对象,使用PROⅡ和i-HEAT软件,考察常压塔中段抽出位置对换热网络的影响。结果表明:常二中的抽出/返回位置下移至与常三线相同的抽出位置时,取热温度提高了12℃,取热量增加了9.3 MW,经济夹点温差下的换热终温升高了1.2℃,加热炉热负荷降低了0.9 MW,冷却水消耗降低了0.5 MW。原富余热量可产中压蒸汽11.7 MW、低温热水4.4 MW,方案调整后,富余热量可产高压蒸汽10.6 MW、中压蒸汽5.6 MW,产汽量明显增加,经济效益显著。对于高压蒸汽供给不足的炼油厂,常二中抽出/返回位置下移方案的优势更为明显。

关键词：常压塔抽出位置取热量换热网络换热终温

Comparison of the complications of mandibular reconstruction using the fibula vs. iliac crest flaps:An updated systematic review and meta-analysis

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Comparison of the complications of mandibular reconstruction...

2021年中华口腔医学会口腔颌面修复专业委员会第六次全国口腔颌面修复学学术年会

作者： Jing Han Zilin Wang Zijei Zhou Zhiyong Guo Yige liu jiannan liu Department of Oromaxillofacial Head and Neck Oncology Shanghai Ninth People's HospitalCollege of StomatologyShanghai Jiao Tong University

Background: The selection of the fibular flap *** crest flap for mandibular reconstruction is still *** meta-analysis aimed to review and compare the complications of mandibular reconstruction using the fibula or iliac crest ***: PubMed,Embase,and the Cochrane Library were systematically searched for available papers published up to May *** primary outcomes were the number of failures,the number of patients with major donor complications,and the number of patients with recipient site ***: This meta-analysis included 18 studies,encompassing 942 *** were no differences between the fibula flap and the iliac flap regarding the odds ratio(OR) of failure(OR=1.13,95%CI: 0.74-1.74,P=0.563;I=32.4%,p=0.103),donor site complications(OR=0.90,95%CI: 0.46-1.76,P=0.756;I=73.5%,p=0.002),and recipient site complications(OR=1.16,95%CI: 0.79-1.68,P=0.452;I=88.0%,p<0.001).There were no differences in the dental outcomes between the two flaps(OR=0.56,95%CI: 0.30-1.05;I=0%,p=0.487).Overall,the sensitivity analyses suggest that the meta-analyses were *** was no publication ***: There were no differences between the fibula flap and the iliac flap regarding the ORs of failure,donor site complications,recipient site complications,and dental *** recent development of computer-aided design,3D printing,and other technologies could optimize surgical design,improve the success rate of the surgery,and reduce complications.

关键词： mandible reconstruction fibula iliac crest surgical flaps meta-analysis