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Distributionally Robust Optimal Reactive Power Dispatch with Wasserstein Distance in Active Distribution Network

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Journal of Modern Power Systems and Clean Energy 2020年第3期8卷 426-436页

作者： Jun Liu Yefu Chen Chao Duan Jiang lin Jia Lyu Shaanxi key Laboratory of Smart Grid School of Electrical EngineeringXi’an Jiaotong UniversityXi’anShaanxi 710049China Electric Power Dispatch and Control Center of Guangdong Power Grid Corporation GuangzhouGuangdong 510050China Department of Electrical Engineering and Electronics University of LiverpoolLiverpool L693GJU.K.

The uncertainties from renewable energy sources(RESs)will not only introduce significant influences to active power dispatch,but also bring great challenges to the analysis of optimal reactive power dispatch(ORPD).To address the influence of high penetration of RES integrated into active distribution networks,a distributionally robust chance constraint(DRCC)-based ORPD model considering discrete reactive power compensators is proposed in this *** proposed ORPD model combines a second-order cone programming(SOCP)-based model at the nominal operation mode and a linear power flow(LPF)model to reflect the system response under ***,a distributionally robust optimization(WDRO)method with Wasserstein distance is utilized to solve the proposed DRCC-based ORPD *** WDRO method is data-driven due to the reason that the ambiguity set is constructed by the available historical data without any assumption on the specific probability distribution of the *** the more data is available,the smaller the ambiguity would *** results on IEEE 30-bus and 123-bus systems and comparisons with the other three-benchmark approaches demonstrate the accuracy and effectiveness of the proposed model and method.

关键词： Active distribution network chance constraint renewable energy source optimal reactive power dispatch(ORPD)

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一种模糊-证据kNN分类方法

电子学报 2012年第12期40卷 2390-2395页

作者：吕锋杜妮文成林河北师范大学物理科学与信息工程学院河北石家庄050024 杭州电子科技大学自动化学院浙江杭州310018

已有的以k-最近邻(kNearest Neighbor,kNN)规则为核心的分类算法,如模糊kNN(FuzzykNN,FkNN)和证据kNN(EvidentialkNN,EkNN)等,存在着两个问题:无法区别出样本特征的差异以及忽略了邻居距训练样本类中心距离的不同所带来的影响.为此,本... 详细信息

已有的以k-最近邻(kNearest Neighbor,kNN)规则为核心的分类算法,如模糊kNN(FuzzykNN,FkNN)和证据kNN(EvidentialkNN,EkNN)等,存在着两个问题:无法区别出样本特征的差异以及忽略了邻居距训练样本类中心距离的不同所带来的影响.为此,本文提出一种模糊-证据kNN算法.首先,利用特征的模糊熵值确定每个特征的权重,基于加权欧氏距离选取k个邻居;然后,利用邻居的信息熵区别对待邻居并结合FkNN在表示信息和EkNN在融合决策方面的优势,采取先模糊化再融合的方法确定待分类样本的类别.本文的方法在uCI标准数据集上进行了测试,结果表明该方法优于已有算法.

关键词： k-最近邻(k-NN) 加权欧氏距离模糊熵折扣因子证据理论

个体间生物学特征和采血时间对肌钙蛋白T浓度影响的研究

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中华检验医学杂志 2024年第3期47卷 259-263页

作者：林依婷周琰周佳烨张春燕王蓓丽潘柏申郭玮上海市老年医学中心检验科上海201100 复旦大学附属中山医院检验科上海200032

目的探讨性别、年龄、采血时间及季节和 cTnT 检测值变化的相关性。方法本研究选取了 2019 年 1月1日至12月31日, 复旦大学附属中山医院就诊的 3 548 例非心血管疾病的人群。收集基础资料, 包括性别、年龄、采血时间、病史、临床诊断和 ... 详细信息

目的探讨性别、年龄、采血时间及季节和 cTnT 检测值变化的相关性。方法本研究选取了 2019 年 1月1日至12月31日, 复旦大学附属中山医院就诊的 3 548 例非心血管疾病的人群。收集基础资料, 包括性别、年龄、采血时间、病史、临床诊断和 cTnT 检测结果, 最终入组了男性1 840例, 女性1 708例, 年龄分布为65(53, 75)岁。使用 kolmogorov-Smirnov(k-S)检验评估数据分布, 其中非正态分布的数据以M(Q1, Q3)表示。使用 Mann-Whitneyu 检验比较男性与女性之间的 cTnT 浓度, 分析性别因素对cTnT检测结果的影响, 使用 k.uskal-Wallis 检验比较各性别组之间的 cTnT 水平, 分析不同采血时间、季节等因素与 cTnT 浓度的相关性。结果在 60 岁以上的人群中, 男性和女性的cTnT 浓度均随着年龄的增长而逐渐升高, cTnT 在 90 岁以上的个体中达到最高水平(男性为 0.028 ng/ml, 女性为 0.018 ng/ml)。全年龄组分析中显示, 男性cTnT 水平(0.012 ng/ml)均高于女性(0.009 ng/ml)(H=6.340, P<0.01)。不同采血时间点的 cTnT 浓度不同。在男性和女性中, cTnT 浓度在 8:00 和 13:00 达到最大值(分别为 0.013 ng/ml 和 0.012 ng/ml)。分析季节对cTnT分泌的生理性影响, 结果显示春季和冬季的cTnT 水平(0.012 ng/ml)通常高于夏、秋两季(0.010 ng/ml)。结论 cTnT 检测值与性别、年龄、采血时间和季节等因素相关。临床工作中分析cTnT检测结果时, 应综合考虑个体的性别和年龄, 以及采血时间点和季节因素的影响。

关键词：肌钙蛋白生物学因素性别年龄采血时间季节变化

三叶豆苷调控多通路减轻心肌梗死后心肌细胞氧化应激损伤和凋亡的机制研究

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中华中医药杂志 2024年第5期39卷 2188-2194页

作者：郭智吴美珠林国晟程瑛郑慧芳彭军沈阿灵福建中医药大学中西医结合研究院福州350122 福建省中西医结合老年性疾病重点实验室福州350122

目的:通过高通量基因数据库(GEO)芯片和网络药理学方法探讨三叶豆苷对心肌梗死(MI)的潜在治疗作用、靶点及通路,并通过体外实验验证三叶豆苷干预对缺血缺氧条件下心肌细胞凋亡的影响及对相关通路的调控作用。方法:通过GEO数据平台、网... 详细信息

目的:通过高通量基因数据库(GEO)芯片和网络药理学方法探讨三叶豆苷对心肌梗死(MI)的潜在治疗作用、靶点及通路,并通过体外实验验证三叶豆苷干预对缺血缺氧条件下心肌细胞凋亡的影响及对相关通路的调控作用。方法:通过GEO数据平台、网络药理学分析三叶豆苷治疗MI的潜在靶点,通过GO和kEGG分析富集潜在相关通路,并通过缺血缺氧诱导H9C2构建体外细胞模型,验证三叶豆苷干预对氧化应激、凋亡及潜在富集通路活化的影响。结果:通过GEO数据集发现MI小鼠中有668个基因上调和651个基因下调,通过多个数据库获取三叶豆苷472个潜在作用靶点,从而获取49个交集靶点,且与BCL2L1、PIk3CA等靶点密切相关。通过GO分析发现,凋亡过程的负调控、炎症反应调节等过程被显著富集。通过kEGG分析发现,PI3k/Akt、HIF-1等通路被显著富集。体外实验结果表明,三叶豆苷干预可抑制缺血缺氧诱导后H9C2的细胞凋亡、线粒体膜电位的下调、ROS的生成、HIF-1α和NOX4蛋白的表达及PI3k/Akt和MAPk通路的异常活化。结论:三叶豆苷抑制缺血缺氧诱导后H9C2细胞的氧化应激损伤、线粒体膜电位改变及凋亡、通过调控PI3k/Akt和MAPk通路,可能是其抗MI的重要机制之一。

关键词：网络药理学三叶豆苷心肌梗死心肌细胞凋亡氧化应激

琼东南盆地花岗质岩浆-构造演化及其对潜山储层物性的约束

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地质通报 2024年第7期43卷 1191-1206页

作者：胡林熊富浩陈安清周杰王文博侯明才中海石油(中国)有限公司海南分公司海南海口570311 油气藏地质及开发工程全国重点实验室成都理工大学四川成都610059

琼东南盆地中生代潜山是认识南海西部陆缘构造演化过程的重要窗口。以琼东南盆地陵南与松南低凸起区的花岗岩潜山为研究对象,开展岩心样品的岩相学、年代学与地球化学研究,揭示其岩石成因及构造环境。研究结果表明,陵南低凸起基岩主要... 详细信息

琼东南盆地中生代潜山是认识南海西部陆缘构造演化过程的重要窗口。以琼东南盆地陵南与松南低凸起区的花岗岩潜山为研究对象,开展岩心样品的岩相学、年代学与地球化学研究,揭示其岩石成因及构造环境。研究结果表明,陵南低凸起基岩主要为二长花岗岩,松南低凸起基岩为花岗闪长岩与二长花岗岩。LA-ICP-MS锆石u-Pb年龄揭示,陵南低凸起区花岗岩类分别形成于249 Ma和233 Ma,而松南低凸起区花岗岩类形成于222~219 Ma。陵南低凸起区花岗岩类的铝饱和指数(A/CNk)为0.99~1.16,岩石整体富集Rb、Th、u等大离子亲石元素,亏损Ta、Nb、Ti等高场强元素,属于弱过铝质高钾钙碱性I型花岗岩;松南低凸起区花岗岩类富碱(k_(2)O+Na_(2)O=6.74%~8.41%)、贫铝(Al_(2)O_(3)=12.52%~13.70%),具有较高的Rb/Sr值(2.03~9.20)和10000 Ga/Al值(>6),且岩石富集轻稀土元素,并具明显的负Eu异常,属于典型的A型花岗岩。岩石成因分析表明,琼东南盆地三叠纪花岗岩类起源于变沉积岩的部分熔融,且经历了不同程度的壳幔混合作用和分离结晶作用。琼东南盆地早三叠世花岗岩类形成于古特提斯域的俯冲汇聚和同碰撞环境,而晚三叠世花岗岩类形成于碰撞后伸展背景。琼东南盆地早三叠世花岗岩不仅含有较高比例的长英质脆性矿物,同时经历了俯冲碰撞-碰撞后伸展等多期次构造作用改造,具备形成裂缝型潜山储层的物质基础和构造动力学条件,是南海潜山油气勘探的重要对象。

关键词：琼东南盆地花岗岩类潜山锆石u-Pb年龄构造环境

using Big Data to Discover Chaos in China’s Futures Market During COVID-19

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Computers, Materials & Continua 2021年第12期69卷 3095-3107页

作者： lin Tie Bin Huang Bin Pan Guang Sun Hunan university of Finance and Economics Changsha410205China university of Alabama TuscaloosaAL 35487U

COVID-19 was first reported in China and quickly spread throughout the *** investor confidence in government efforts to control the pandemic seriously affected global financial *** study investigated chaos in China’s futures market during COVID-19,focusing on the degree of chaos at different periods during the *** constructed a phase diagram to observe the attractor trajectory of index futures(IFs).During the COVID-19 outbreak,overall chaos in China’s futures market was increasing,and there was a clear correlation between market volatility and the macroenvironment(mainly government regulation).The Hurst index,calculated by rescaled range(R/S)analysis,was *** price and return of IFs showed long-term correlation and fractal characteristics;the relevant dimensions of the futures market were ***,under the influence of an emergency(COVID-19),chaos in China’s financial market intensified,creating a need for timely government intervention and macrocontrol of the *** study’s findings can help improve the government’s understanding of the phenomenon of financial chaos caused by *** study also provides theoretical guidance for controlling financial chaos and maintaining healthy economic development when faced with similar events in the future.

关键词： Chinese futures market COVID-19 chaos Lyapunov index Hurst index

Chemical characteristics and Pb isotopic compositions of PM2.5 in Nanchang, China

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Particuology 2017年第3期15卷 95-102页

作者： Yang Zhao Ruilian Yu Gongren Hu Xiaohui lin Xianrong Liu College of Chemical Engineering Huoqiao University Xiamen 361021 China Environmental Protection Agency of Nanchang City Nanchang 330038 China

In mid-September 2013, PM2.5 samples were collected at six sites in Nanchang, Jiangxi Province, China, to quantify nine water-soluble ions （Ca2＋, Mg2＋, k＋, Na＋, NH4＋, SO42-, Cl-, F , NO3 ）, 29 trace elements （Ba, Zn, Pb, Ni, Mo, Cr, Cu, Sr, Sb, Rb, Cd, Bi, Zr, V, Ga, Li, Y, Nb, W, Cs, Tl, Sc, Co, u, Hf, In, Re, Be, and Ta）, and to characterize Pb isotopic ratios （^207pb/^206pb, ^208pb/^206pb, and ^207pb/^204pb） for identifying the main source（s） of Pb. The results showed that the average daily PM2.5 concentration （53.16 ± 24.17） Dg/m3 was within the secondary level of the Chinese ambient air quality standard. The combined concentrations of SO42-, NH4＋, and NO3- to total measured water-soluble ion concentrations in PM2.5 ranged from 79.40% to 95.18%, indicating that anthropogenic sources were significant. Coal combustion and vehicle emissions were both contributors to PM2.5 based on the NO3-/SO4^2- ratios. Wushu School experienced the lowest concentrations of PM2.s and most trace elements among the six sampling sites. Enrichment factor results showed that TI, Cr, In, Cu, Zn, Pb, Bi, Ni, Sb, and Cd in PM2.5 were affected by anthropogenic activities. Cluster analysis suggested that Cd, Sb, Pb, Re, Zn, Bi, Cs, Tl, Ga, and In were possibly related to coal combustion and vehicle exhaust, while Ni, Nb, Cr, and Mo may have originated from metal smelting. Pb isotopic tracing showed that coal dust, cement dust, road dust and construction dust were the major Pb sources in PM2.5 in Nanchang. Combined, these sources contributed an average of 72.51% of the Pb measured, while vehicle exhaust accounted for 27.49% of Pb based on results from a binary Pb isotope mixed model,

关键词： PMzs Water-soluble ions Trace elements Pb isotopic composition Nanchang

An Ensemble Approach for Emotion Cause Detection with Event Extraction and Multi-kernel SVMs

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Tsinghua Science and Technology 2017年第6期22卷 646-659页

作者： Ruifeng Xu Jiannan Hu Qin Lu Dongyin Wu lin Gui School of Computer Science and Technology Harbin Institute of Technology Shenzhen Graduate School Department of Computing the Hong Kong Polytechnic University

In this paper, we present a new challenging task for emotion analysis, namely emotion cause *** this task, we focus on the detection of emotion cause a.k.a the reason or the stimulant of an emotion, rather than the regular emotion classification or emotion component extraction. Since there is no open dataset for this task available, we first designed and annotated an emotion cause dataset which follows the scheme of W3 C Emotion Markup Language. We then present an emotion cause detection method by using event extraction framework,where a tree structure-based representation method is used to represent the events. Since the distribution of events is imbalanced in the training data, we propose an under-sampling-based bagging algorithm to solve this problem. Even with a limited training set, the proposed approach may still extract sufficient features for analysis by a bagging of multi-kernel based SVMs method. Evaluations show that our approach achieves an F-measure 7.04%higher than the state-of-the-art methods.

关键词： emotion cause detection event extraction multi-kernel SVMs bagging

Optimized photoluminescence of red phosphor k_(2)LiAlF_(6):Mn^(4+)synthesized by a cation-exchange method

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Science China(Technological Sciences) 2017年第10期60卷 1458-1464页

作者： ZHu YiWen LIu Yong HuANG lin XuAN TongTong WANG Jing Ministry of Education key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and TechnologiesKLGHEI of Environment and Energy ChemistrySchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China Guzhen Productivity Promotion Center Zhongshan 528400China

Red phosphor k2LiA1F6：Mn4＋ has been synthesized by a cation-exchange method in HF solution. To optimize their optical properties, phosphors were synthesized using different reaction conditions. The k2LiA1F6：0.5%Mn4＋ synthesized at 20℃ for 4 h shows the highest luminescence intensity. The temperature-dependent emission intensity of the phosphor was investigated, and it was found to exhibit good thermal stability, making it a promising red phosphor candidate for warm WLEDs.

关键词： photoluminescence red phosphor k_(2)LiAIF_(6):Mn^(4+) cation-exchange method