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Multi-objective interval prediction of wind power based on conditional copula function

Journal of Modern Power Systems and Clean Energy 2019年第4期7卷 802-812页

作者： Gang ZHANG zhixuan li Kaoshe ZHANG Lei ZHANG Xia HUA Yongqing WANG Institute of Water Resources and Hydro-Electric Engineering Xi’an University of TechnologyXi’an 710048China State Grid Shaanxi Baoji Electric Power Company Baoji 721000China State Grid Gansu Electric Power Company Gansu Electric Power Research InstituteLanzhou 730050China State Grid Shaanxi Electric Power Company Shaanxi Electric Power Research InstituteXi’an 710054China

Interval prediction of wind power,which features the upper and lower limits of wind power at a given confidence level,plays a significant role in accurate prediction and stability of the power grid integrated with wind ***,the conventional methods of interval prediction are commonly based on a hypothetic probability distribution function,which neglects the correlations among various variables,leading to the decrease of prediction ***,we improve the multi-objective interval prediction based on the conditional copula function,through which we can fully utilize the correlations among variables to improve prediction accuracy without an assumed probability distribution *** use the multi-objective optimization method of nondominated sorting genetic algorithm-II(NSGA-II)to obtain the optimal solution *** particular best solution is weighted by the prediction interval average width(PIAW)and prediction interval coverage probability(PICP)to pick the optimized solution in practical ***,we apply the proposed method to three wind power plants in different cities in China as examples forvalidation and obtain higher prediction accuracy compared with other methods,i.e.,relevance vector machine(RVM),artificial neural network(ANN),and particle swarm optimization kernel extreme learning machine(PSO-KELM).These results demonstrate the superiority and practicability of this method in interval prediction of wind power.

关键词： Wind power prediction Interval prediction Conditional copula function Empirical distribution function Multi-objective optimization algorithm

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Measuring clock jumps using pulsar timing

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Science China(Physics,Mechanics & Astronomy) 2020年第1期63卷 112-117页

作者： zhixuan li KeJia Lee Ricardo Nicolaos Caballero YongHua Xu LongFei Hao Min Wang JianCheng Wang Yunnan Observatories Chinese Academy of SciencesKunming 650216China Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of SciencesKunming 650216China

In this paper,we investigate the statistical signal-processing algorithm to measure the instant local clock jump from the timing data of multiple *** algorithm is based on the framework of Bayesian *** order to make the Bayesian algorithm applicable with limited computational resources,we dedicated our efforts to the analytic marginalization of irrelevant *** found that the widely used parameter for pulsar timing systematics,the"Efac"parameter,can be analytically *** reduces the Gaussian likelihood to a function very similar to the Student’s *** iterative method to solve the maximum likelihood estimator is also explained in the *** pulsar timing data from the Yunnan Kunming 40-m radio telescope,we demonstrate the application of the method,where 80-ns level precision for the clock jump can be *** a precision is comparable to that of current commercial time transferring service using *** expect that the current method could help developing the autonomous pulsar time scale.

关键词： pulsars time series analysis clocks and frequency standards

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Enhancing interfacial li+transport and dielectric properties in poly(ethylene oxide)-based all-solid electrolytes via inactive g-C_(3)N_(4)nanosheets filler incorporation

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Journal of Materials Science & Technology 2024年第16期183卷 184-192页

作者： zhixuan li Weijian Zhang Yue Chen Qiaoquan lin Long Zhang Jianming Tao Oleg V.Kolosov Jiaxin li Yingbin lin Zhigao Huang College of Physics and Energy Fujian Normal UniversityFujian Provincial Key Laboratory of Quantum Manipulation and New Energy MaterialsFuzhou 350117China Fujian Provincial Engineering Technical Research Centre of Solar-Energy Conversion and Stored Energy Fuzhou 350117China Fujian Provincial Collaborative Innovation Centre for Advanced High-Field Superconducting Materials and Engineering Fuzhou 350117China Physics Department Lancaster UniversityLancaster LA14YBUK The Faraday Institution Quad OneBecquerel AvenueHarwell CampusDidcotOX110RAUK

The advancement of all-solid-state li metal batteries(ASSLMBs)faces a major challenge in the growth of lithium dendrites on the anode-electrolyte *** this study,we propose a dual-filler approach using poly(ethylene oxide)(PEO)-based solid polymer electrolytes(SPEs)that combine li_(1.4)Al_(0.4)Ti_(1.6)(PO_(4))_(3)(LATP)ion-conductive particles with graphitic carbon nitride(g-C_(3)N_(4))*** through sec-ond harmonic resonance enhanced electrostatic force microscopy and critical current density(CCD)tests reveal that the g-C_(3)N_(4)additives form nano-capacitors at the SPE-lithium interface,effectively reducing sudden changes in current *** distribution of relaxation time constant(DRT)measurements confirms that the g-C_(3)N_(4)filler suppresses uncontrolled li dendrite growth,effectively mitigating battery aging caused by anode interfacial ***,X-ray photoelectron spectroscopy(XPS)anal-ysis indicates that the nitrogen-containing organic groups in g-C_(3)N_(4)are reduced to form a stable interfa-cial layer with lithium *** a result of these enhancements,the electrolyte demonstrates remarkable interfacial stability in li/li symmetrical cells at 0.65 mA/cm2 and delivers promising performance in assembled li-liFePO4 batteries,achieving a reversible capacity of 121.6 mAh/g at 1 C after 200 *** findings highlight the potential of dual-filler PEO-based SPEs for promoting interfacial lithium-ion transport in all-solid-state li metal batteries.

关键词： lithium metal anode lithium dendrite Dielectric force microscopy All-solid-state electrolyte lithium ion batteries

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Five new terpenoids from Viburnum odoratissimum ***

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Chinese Journal of Natural Medicines 2023年第4期21卷 298-307页

作者： li Yang JIAN Yajiao XU Fan LUO Yongxin li zhixuan OU Yi WEN Yan JIN Jingwei ZHANG Chuarui GAN lishe School of Biotechnology and Health Sciences International Healthcare Innovation InstituteWuyi UniversityJiangmen 529020China Chongqing Key Laboratory of Natural Product Synthesis and Drug Research School of Pharmaceutical SciencesChongqing UniversityChongqing 401331China Shandong Laboratory of Yantai Drug Discovery Bohai Rim Advanced Research Institute for Drug DiscoveryYantai 264117China College of Pharmaceutical Sciences Zhejiang UniversityHangzhou 310058China

Five new terpenoids,including two vibsane-type diterpenoids(1,2)and three iridoid allosides(3-5),together with eight known ones,were isolated from the leaves and twigs of Viburnum odoratissimum *** planar structures and relative configurations were determined by spectroscopic methods,especially 2D NMR *** sugar moieties of the iridoids were confirmed asβ-D-allose by GC analysis after acid hydrolysis and *** absolute configurations of neovibsanin Q(1)and dehydrovibsanol B(2)were determined by quantum chemical calculation of their theoretical electronic circular dichroism(ECD)spectra and Rh2(OCOCF_(3))_(4)-induced ECD *** anti-inflammatory activities of compounds 1,3,4,and 5 were evaluated using an LPS-induced RA W264.7 cell *** 3 suppressed the release of NO in a dose-dependent manner,with an IC_(50) value of 55.64μmol·L^(-1).The cytotoxicities of compounds 1-5 on HCT-116 cells were assessed and the results showed that compounds 2 and 3 exhibited moderate inhibitory activities with IC_(50) values of 13.8 and 12.3μmol·L^(-1),respectively.

关键词： Viburnum odoratissimum var.sessilifolrum Terpenoids Acid hydrolysis ECD calculation Anti-inflammation

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Combination therapy of thiamine,vitamin C and hydrocortisone in treating patients with sepsis and septic shock:a meta-analysis and trial sequential analysis

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Burns & Trauma 2021年第1期9卷 58-71页

作者： Renqi Yao Yibing Zhu Yue Yu zhixuan li lixue Wang liyu Zheng Jingyan li Huibin Huang Guosheng Wu Feng Zhu Zhaofan Xia Chao Ren Yongming Yao Translational Medicine Research Center Fourth Medical Center and Medical Innovation Research Division of the Chinese PLA General HospitalBeijing 100048China Department of Burn Surgery the First Affiliated Hospital of Naval Medical UniversityShanghai 200433China Research Unit of key techniques for treatment of burns and combined burns and trauma injury Chinese Academy of Medical Sciences100730China Medical Research and Biometrics Center Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100037China Department of Cardiothoracic Surgery Changzheng HospitalNaval Medical UniversityShanghai 200003China International Cooperation Laboratory on Signal Transduction Eastern Hepatobiliary Surgery InstituteSecond Military Medical UniversityShanghai 200082China Department of Emergency The Second Hospital of Hebei Medical UniversityHebei 050000China Department of Critical Care Medicine Beijing Tsinghua Chang Gung HospitalBeijing 102218China Medical ICU Peking Union Medical College HospitalPeking Union Medical College Chinese Academy of Medical Sciences Beijing 100730China and 10Department of Critical Care MedicineShanghai East HospitalTongji University School of MedicineShanghai 200120China

Background:The objective of this study was to evaluate the clinical efficacy of thiamine and vitamin C with or without hydrocortisone coadministration on the treatment of sepsis and septic ***:MEDliNE,EMBASE and CENTRAL databases were searched for randomized controlled trials(RCTs)that made a comparative study between the combination therapy of vitamin C and thiamine with or without hydrocortisone and the administration of placebo in patients with sepsis or septic *** reviewers independently performed study selection,data extraction and quality *** short-term mortality and change in the sequential organ failure assessment(SOFA)score from baseline(delta SOFA)were set as the primary *** endpoints included intensive care unit(ICU)mortality,new onset of acute kidney injury,total adverse events,ICU and hospital length of stay,duration of vasopressor usage and ventilator-free ***,trial sequential analysis was conducted for primary ***:Eight RCTs with 1428 patients were included in the current *** results showed no significant reduction of short-term mortality in sepsis and septic shock patients who received combination therapy of vitamin C and thiamine with or without hydrocortisone compared to those with placebo{risk ratio(RR),1.02[95%confidence interval(CI),0.87 to 1.20],p=0.81,I2=0%;risk difference(RD),0[95%CI,−0.04 to 0.05]}.Nevertheless,the combination therapy was associated with significant reduction in SOFA score[mean difference(MD),−0.63,(95%CI,−0.96 to−0.29,plity when compared with placebo,but was associated with significant reduction in SOFA score among patie

关键词： Thiamine Vitamin C Sepsis Septic shock Sequential organ failure assessment Meta-analysis

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基于计划行为理论的城市居住分异对居民健康活动的影响研究

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地理科学进展 2019年第11期38卷 1712-1725页

作者：李智轩胡宏南京大学建筑与城市规划学院

虽然国内外大量研究探讨了居住环境与健康关系,但较少将城市地理学与社会心理学结合,从理性行为角度分析居住环境对居民身体活动的影响机制。论文引入计划行为理论的分析框架,以中国居住空间分异的特殊性为切入点,以南京为实证对象,运... 详细信息

虽然国内外大量研究探讨了居住环境与健康关系,但较少将城市地理学与社会心理学结合,从理性行为角度分析居住环境对居民身体活动的影响机制。论文引入计划行为理论的分析框架,以中国居住空间分异的特殊性为切入点,以南京为实证对象,运用结构方程模型解析居民态度、主观规范、知觉行为控制和行为意向对居民身体活动的影响路径。结果表明:传统社区、单位社区、保障房社区、城中村和商品房小区的居民社会经济特征和健康活动存在明显差异。影响居民健身意向和健身活动的最重要因素为知觉健身行为控制强度感知。消减居民健身的主观限制,包括为其提供健身设备、公共健身资源和对健身进行补贴,可提升其健身活动水平。研究结果可为通过改善建成环境进行健康行为的主动干预提供对策建议。

关键词：计划行为理论居住分异居民健康身体活动南京

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FGD Franchising Pilot Project of Thermal Power Plants

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Electricity 2009年第4期20卷 41-47页

作者： Wang zhixuan,Pan li and Zhang Jingyi China Electricity Council Wang Ying China Electricity Council

According to the national policy on enhancing environmental protection,the five major power generation companies are required to carry out flue gas desulphurization(FGD) franchising pilot project in thermal power *** paper introduces the development of this pilot project,including the foundation,purpose,objects,demands and *** also discusses some main problems encountered during implementation,involving the understanding,legislation,financing,taxation,pricing and management of *** the end,it puts forward some suggestions and countermeasures with regard to laws,regulations,taxation policy and electricity pricing policy.

关键词： FGD Franchising Pilot Project of Thermal Power Plants Project

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数据驱动的中国城市空间治理框架设想

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经济地理 2023年第5期43卷 26-35页

作者：甄峰李智轩南京大学建筑与城市规划学院江苏南京210093 江苏省智慧城市规划与数字治理工程研究中心江苏南京210093 香港大学地理系中国香港999077

提升空间治理水平是国家治理能力现代化的重要发力点。随着智慧社会的到来,不断丰富的数据源已经成为感知和理解城市空间的有力武器。城市空间治理作为空间治理体系中承上启下的关键层级,目前仍缺乏统一协调的框架来应对其面临的失效、... 详细信息

提升空间治理水平是国家治理能力现代化的重要发力点。随着智慧社会的到来,不断丰富的数据源已经成为感知和理解城市空间的有力武器。城市空间治理作为空间治理体系中承上启下的关键层级,目前仍缺乏统一协调的框架来应对其面临的失效、失序、失衡问题。这促使数据驱动成为未来治理数字化、智慧化转型的必由之路,从而深刻推动了空间治理由经验式向科学式的逻辑嬗变。充分挖掘数据资源潜力有助于强化城市空间治理在不同单元、不同层级、不同主体之间的联系。文章提出数据驱动的城市空间治理需要基于海量多源地理信息数据和城市感知数据,打造互联互通的数据管理平台与刚柔并重的指标体系;进一步,通过构建城市安全格局和功能格局明确城市空间发展基本框架,利用城市智脑平台形成空间监测、评估、模拟和决策全流程的智慧化治理框架,从而实现城市空间的高质量、协调、公平发展的最终目标。

关键词：数据驱动城市空间治理治理现代化智慧城市国土空间规划高质量发展

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双碳目标下城乡空间治理路径与策略

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城市发展研究 2022年第5期29卷 113-118页

作者：李智轩甄峰南京大学建筑与城市规划学院江苏省智慧城市设计仿真与可视化技术工程实验室

实现碳达峰、碳中和是生态文明建设的重要抓手。现有碳减排行动方案已经针对城乡建设、产业、能源等领域做出了详尽部署，但也存在着对空间关注不足的问题。特别是在市域范围内，尚缺少从城乡统筹视角展开空间治理的实施框架和具体手段... 详细信息

实现碳达峰、碳中和是生态文明建设的重要抓手。现有碳减排行动方案已经针对城乡建设、产业、能源等领域做出了详尽部署，但也存在着对空间关注不足的问题。特别是在市域范围内，尚缺少从城乡统筹视角展开空间治理的实施框架和具体手段，减碳如何应用落实到各级空间单元上仍不清晰。从空间视角出发，解读碳效益在与经济效益、社会效益协调时面临的挑战，并从治理理念、治理对象、治理手段和治理方法四个方面提出双碳目标下城乡空间治理路径。基于此，提出碳数据赋能的城乡空间治理策略，以海量精确的碳数据赋能空间治理，将其用于空间碳效益的监测评估、模拟规划和管理运营，以加强碳减排的系统性和落地性。

关键词：双碳碳排放碳数据城乡空间治理

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Aristolochic acids exposure was not the main cause of liver tumorigenesis in adulthood

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Acta Pharmaceutica Sinica B 2022年第5期12卷 2252-2267页

作者： Shuzhen Chen Yaping Dong Xinming Qi Qiqi Cao Tao Luo Zhaofang Bai Huisi He Zhecai Fan lingyan Xu Guozhen Xing Chunyu Wang Zhichao Jin zhixuan li Lei Chen Yishan Zhong Jiao Wang Jia Ge Xiaohe Xiao Xiuwu Bian Wen Wen Jin Ren Hongyang Wang National Center for liver Cancer Second Military Medical UniversityShanghai 200438China International Cooperation Laboratory on Signal Transduction Eastern Hepatobiliary Surgery HospitalSecond Military Medical UniversityShanghai 200438China Center for Drug Safety Evaluation and Research State Key Laboratory of Drug ResearchShanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China Fudan University Shanghai Cancer Center Shanghai 200032China The Graduate School of Fujian Medical University Fuzhou 350122China Institute of Pathology Southwest HospitalThird Military Medical University(Army Medical University)Chongqing 400038China Key Laboratory of Tumor Immunopathology Ministry of Education of ChinaChongqing 400038China China Military Institute of Chinese Materia Fifth Medical Center of Chinese PLA General HospitalBeijing 100039China Department of Health Statistics Faculty of Medical ServiceSecond Military Medical UniversityShanghai 200438China

Aristolochic acids(AAs) have long been considered as a potent carcinogen due to its nephrotoxicity. Aristolochic acid I(AAI) reacts with DNA to form covalent aristolactam(AL)-DNA adducts,leading to subsequent A to T transversion mutation, commonly referred as AA mutational signature. Previous research inferred that AAs were widely implicated in liver cancer throughout Asia. In this study, we explored whether AAs exposure was the main cause of liver cancer in the context of HBV infection in China's Mainland. Totally 1256 liver cancer samples were randomly retrieved from 3 medical centers and a refined bioanalytical method was used to detect AAI-DNA adducts. 5.10% of these samples could be identified as AAI positive exposure. Whole genome sequencing suggested 8.41% of 107 liver cancer patients exhibited the dominant AA mutational signature, indicating a relatively low overall AAI exposure rate. In animal models, long-term administration of AAI barely increased liver tumorigenesis in adult mice, opposite from its tumor-inducing role when subjected to infant mice. Furthermore, AAI induced dose-dependent accumulation of AA-DNA adduct in target organs in adult mice, with the most detected in kidney instead of liver. Taken together, our data indicate that AA exposure was not the major threat of liver cancer in adulthood.

关键词： Aristolochic acids(AAs) Mutational signature AA-DNA adduct Hepatocellular carcinoma(HCC) liver tumorigenesis Hepatitis B virus(HBV) Risk factors Tumor prevention

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