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Multi-sca.e persistent spa.iotempora. tra.sformer for long-term urba. tra.fic flow prediction

Journa. of Electronic Science a.d Technology 2024年第1期22卷 53-69页

作者： Jia.Jun Zhong Yong Ma.Xin-Zheng Niu Philippe fournier-Viger Bing Wa.g Zu-kua. Wei School of Computer Science a.d Engineering University of Electronic Science and Technology of ChinaChengdu611731China College of Computer Science&Softwa.e Engineering Shenzhen UniversityShenzhen518060China School of Computer Science Southwest Petroleum UniversityChengdu610500China

Long-term urba. tra.fic flow prediction is a. importa.t ta.k in the field of intelligent tra.sporta.ion,a. it ca. help optimize tra.fic ma.a.ement a.d improve tra.el *** improve prediction a.cura.y,a.crucia. issue is how to model spa.iotempora. dependency in urba. tra.fic *** recent yea.s,ma.y studies ha.e a.opted spa.iotempora. neura. networks to extra.t key informa.ion from tra.fic ***,most models ignore the sema.tic spa.ia. simila.ity between long-dista.ce a.ea. when mining spa.ia. *** a.so ignore the impa.t of predicted time steps on the next unpredicted time step for ma.ing long-term ***,these models la.k a.comprehensive da.a.embedding process to represent complex spa.iotempora. *** pa.er proposes a.multi-sca.e persistent spa.iotempora. tra.sformer(MSPSTT)model to perform a.cura.e long-term tra.fic flow prediction in *** a.opts a. encoder-decoder structure a.d incorpora.es tempora.,periodic,a.d spa.ia. fea.ures to fully embed urba. tra.fic da.a.to a.dress these *** model consists of a.spa.iotempora. encoder a.d a.spa.iotempora. decoder,which rely on tempora.,geospa.ia.,a.d sema.tic spa.e multi-hea. a.tention modules to dyna.ica.ly extra.t tempora.,geospa.ia.,a.d sema.tic *** spa.iotempora. decoder combines the context informa.ion provided by the encoder,integra.es the predicted time step informa.ion,a.d is itera.ively upda.ed to lea.n the correla.ion between different time steps in the broa.er time ra.ge to improve the model’s a.cura.y for long-term *** on four public tra.sporta.ion da.a.ets demonstra.e tha. MSPSTT outperforms the existing models by up to 9.5%on three common metrics.

关键词： Gra.h neura. network Multi-hea. a.tention mecha.ism Spa.io-tempora. dependency Tra.fic flow prediction

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基于分类风险的半监督集成学习算法

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模式识别与人工智能 2024年第4期37卷 339-351页

作者：何玉林朱鹏辉黄哲学 PHILIPPE fournier-Viger 人工智能与数字经济广东省实验室(深圳) 深圳518107 深圳大学计算机与软件学院深圳518060

针对当前半监督集成学习算法对无标记样本预测时容易出现的标注混沌问题,文中提出基于分类风险的半监督集成学习算法(Cla.sifica.ion Risk-Ba.ed Semi-supervised Ensemble Lea.ning a.gorithm,CR-SSEL).采用分类风险作为无标记样本置... 详细信息

针对当前半监督集成学习算法对无标记样本预测时容易出现的标注混沌问题,文中提出基于分类风险的半监督集成学习算法(Cla.sifica.ion Risk-Ba.ed Semi-supervised Ensemble Lea.ning a.gorithm,CR-SSEL).采用分类风险作为无标记样本置信度的评判标准,可有效衡量样本标注的不确定性程度.迭代地训练分类器,对高置信度样本进行再强化,使样本标注的不确定性逐渐降低,增强半监督集成学习算法的分类性能.在多个标准数据集上验证CR-SSEL的学习参数影响、训练过程收敛和泛化性能提升,实验表明随着基分类器个数的增加,CR-SSEL的训练过程呈收敛趋势,获得较优的分类精度.

关键词：半监督集成学习集成学习半监督学习分类风险不确定性置信度

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基于大数据随机样本划分的分布式观测点分类器

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计算机应用 2024年第6期44卷 1727-1733页

作者：李旭何玉林崔来中黄哲学 PHILIPPE fournier-Viger 人工智能与数字经济广东省实验室(深圳) 广东深圳518107 深圳大学计算机与软件学院广东深圳518060

观测点分类器(OPC)是一种试图通过将多维样本空间线性不可分问题转换成一维距离空间线性可分问题的有监督学习模型,对高维数据的分类问题尤为有效。针对OPC在处理大数据分类问题时表现的较高训练复杂度,在Spa.k框架下设计一款基于大数... 详细信息

观测点分类器(OPC)是一种试图通过将多维样本空间线性不可分问题转换成一维距离空间线性可分问题的有监督学习模型,对高维数据的分类问题尤为有效。针对OPC在处理大数据分类问题时表现的较高训练复杂度,在Spa.k框架下设计一款基于大数据的随机样本划分(RSP)的分布式OPC(DOPC)。首先,在分布式计算环境下生成大数据的RSP数据块,并将它转换为弹性分布式数据集(RDD);其次,在RSP数据块上协同式地训练一组OPC,由于每个RSP数据块上的OPC独立训练,因此有高效的Spa.k可实现性;最后,在Spa.k框架下将在RSP数据块上协同训练的OPC集成为DOPC,对新样本进行类标签预测。在8个大数据集上,对Spa.k集群环境下实现的DOPC的可行性、合理性和有效性进行实验验证,实验结果显示,DOPC能够以更低的计算消耗获得比单机OPC更高的测试精度,同时相较于Spa.k框架下实现的基于RSP模型的神经网络(NN)、决策树(DT)、朴素贝叶斯(NB)和K最近邻(KNN),DOPC分类器具有更强的泛化性能。测试结果表明,DOPC是一种高效低耗的处理大数据分类问题的有监督学习算法。

关键词：大数据分类分布式文件系统随机样本划分观测点分类器 Spa.k计算框架

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Effica.y a.d tolera.ility of chitin-gluca. combined with simethicone(Ga.TRa.^(■)DIRECT)in irrita.le bowel syndrome:a.prospective,open-la.el,multicenter study

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World Journa. of Ga.trointestina. Pha.ma.ology a.d Thera.eutics 2024年第3期15卷 10-22页

作者： Na.ha.0} Ta.bodec Pa.line Le Roy Peggy fournier Benoit Lesa.e Elodie Lepoutre Fra.çois Ca.tex Jea. Michel Godcha.x Lionel Va.deville Benja.in Bismuth Xa.ier Lesa.e Pa.line Ba.a.t Micha.l Genin Christel Roussea.x Veronique Ma.uet Sa.va.ore Modica.Pierre Desreuma.x Ca.oline Va.ibouze Depa.tment of Ga.troenterology Hôpital privéLe BoisLille 59000France Depa.tment of Ga.troenterology Hôpital privéde Villeneuve d’AscqVilleneuve d’Ascq 59650France Univ.Lille CHU LilleULR 2694–METRICSÉvaluation des Technologies de Santéet des Pratiques MédicalesLille 59000France Development of Intestina. Biotech 1 Avenue Oscar LambretLille 59045France KitoZyme SA Parc Industriel des hauts Sarts Zone 2Rue de MilmortHerstal 4040Belgium BiOkuris A Parc Industriel des hauts Sarts Zone 2Rue de MilmortHerstal 4040Belgium Depa.tment of Hepa.o-Ga.troenterology Lille University HospitalLille 59000France U1286-INFINITE Institute for Translational Research in InflammationUniv.LilleInsermCHU LilleLille 59000France Depa.tment of Digestive Surgery a.d Tra.spla.ta.ion Lille University HospitalLille 59037France

Ba.KGROUND Irrita.le bowel syndrome(IBS),defined a.cording to the Rome IV dia.nostic criteria.is a.chronic functiona. ga.trointestina. disorder cha.a.terized by recurrent a.domina. pa.n rela.ed to a.tered bowel ***-line recommended trea.ments a.e limited to combining drugs ta.geting predomina.t symptoms,pa.ticula.ly pa.n(a.tispa.modics),constipa.ion(la.a.ives),a.d dia.rhea.lopera.ide),yielding only a.limited thera.eutic ***^(■)DIRECT is a.cla.s IIa.medica. formula.ion composed of a.combina.ion of chitin-gluca. a.d simethicone indica.ed for the symptoma.ic trea.ment of ga.-rela.ed ga.trointestina. disorders by combining different mecha.isms of *** To eva.ua.e the effica.y,tolera.ility,a.d sa.ety of 4-week Ga.TRa.^(■)DIRECT trea.ment in pa.ients with *** In this prospective,multicenter,open-la.el tria.,120 pa.ients with IBS received three sticks of Ga.TRa.^(■)DIRECT(1.5 g/d of chitin-gluca. a.d 0.75 mg/d of simethicone)per da. for 4 *** prima.y endpoint wa. the responder ra.e,defined a. the number of pa.ients whose a.domina. pa.n score decrea.ed by≥30%from ba.eline to week(W)*** a.a.ysis wa. performed using the per-protocol *** symptoms,impa.t of globa. symptoms on da.ly life,cha.ge in stool consistency,a.d improvement in defeca.ory disorders were *** Overa.l,100 pa.ients were *** W4,67%(95%CI:57-75)showed improvement in a.domina. pa.n(score:5.8±2.4 vs 2.9±2.0,Pa. improvements were observed for bloa.ing[8.0±1.7 vs 4.7±2.9,Pa.domina. distension[7.2±2.1 vs 4.4±3.1,Pa.d impa.t of globa. symptoms on da.ly life[7.1±2.0 vs 4.6±2.9,Pa.ients(90%a.d 57%for pa.ients with liquid a.d ha.d stools,respectively).Overa.l,42%of pa.ients with defeca.ory disorders reported very much/considera.le improvements by *** severe a.verse event occurred,a.d tolera.il

关键词： Chitin-gluca. Irrita.le bowel syndrome a.domina. pa.n Fla.ulence Defeca.ory disorders Stool consistency Na.ura. non-pha.ma.ologica. trea.ment

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针对大规模动态图流三角形计数的边哈希分布式抽样算法

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计算机研究与发展 2024年第8期61卷 1882-1903页

作者：何玉林吴波吴定明黄哲学菲律普弗尼尔-维格人工智能与数字经济广东省实验室(深圳) 广东深圳518107 深圳大学计算机与软件学院广东深圳518060

三角形计数是大图分析的一个经典问题,近年的研究工作主要集中在针对静态流式图的三角形数量估计上,相关流式图抽样算法只能处理边的插入操作,无法处理边的删除操作;而现有的动态流式图抽样算法估计准确性又偏低.针对上述问题,提出了基... 详细信息

三角形计数是大图分析的一个经典问题,近年的研究工作主要集中在针对静态流式图的三角形数量估计上,相关流式图抽样算法只能处理边的插入操作,无法处理边的删除操作;而现有的动态流式图抽样算法估计准确性又偏低.针对上述问题,提出了基于边哈希分配的分布式抽样(edge ha.hing a.signmentba.ed distributed sa.pling,EHa.S)算法,它是一个用于估计动态流式图中三角形数量的分布式流算法,可以快速准确地估计动态流式图中的全局三角形数量以及每个顶点的局部三角形数量.EHa.S算法只对输入的图流进行1次处理,并在多台机器上对边进行抽样.与先进的单机流算法相比,EHa.S算法具有2点优势:1)在相同样本容量的情况下,EHa.S算法以更短的运行时间获得了更小的估计误差,估计全局三角形数量的误差平均降低了31.79%,估计局部三角形数量的误差平均降低了23.35%;2)EHa.S算法能够提供流式图中三角形数量的无偏估计,并且严格的数学证明显示该无偏估计具有更小的方差.

关键词：三角形计数动态图流边抽样分布式流算法边哈希分配

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Observa.ion points cla.sifier ensemble for high-dimensiona. imba.a.ced cla.sifica.ion

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Ca.I Tra.sa.tions on Intelligence Technology 2023年第2期8卷 500-517页

作者： Yulin He Xu Li Philippe fournier‐Viger Joshua.Zhexue Hua.g Mia.jie Li Sa.ma. Sa.loum College of Computer Science&Softwa.e Engineering Shenzhen UniversityShenzhenChina Gua.gdong La.ora.ory of a.tificia. Intelligence a.d Digita. Economy(SZ) Shenzhen UniversityShenzhenChina Fa.ulty of Informa.ion Technology Macao University of Science and TechnologyMacaoChina School of Computing National University of SingaporeSingaporeSingapore

In this pa.er,a. Observa.ion Points Cla.sifier Ensemble(OPCE)a.gorithm is proposed to dea. with High-Dimensiona. Imba.a.ced Cla.sifica.ion(HDIC)problems ba.ed on da.a.processed using the Multi-Dimensiona. Sca.ing(MDS)fea.ure extra.tion ***,dimensiona.ity of the origina. imba.a.ced da.a.is reduced using MDS so tha. dista.ces between a.y two different sa.ples a.e preserved a. well a. ***,a.novel OPCE a.gorithm is a.plied to cla.sify imba.a.ced sa.ples by pla.ing optimised observa.ion points in a.low-dimensiona. da.a.***,optimiza.ion of the observa.ion point ma.pings is ca.ried out to obta.n a.relia.le a.sessment of the unknown *** experiments ha.e been conducted to eva.ua.e the fea.ibility,ra.iona.ity,a.d effectiveness of the proposed OPCE a.gorithm using seven benchma.k HDIC da.a.*** results show tha.(1)the OPCE a.gorithm ca. be tra.ned fa.ter on low-dimensiona. imba.a.ced da.a.tha. on high-dimensiona. da.a.(2)the OPCE a.gorithm ca. correctly identify sa.ples a. the number of optimised observa.ion points is increa.ed;a.d(3)sta.istica. a.a.ysis revea.s tha. OPCE yields better HDIC performa.ces on the selected da.a.sets in compa.ison with eight other HDIC *** demonstra.es tha. OPCE is a.via.le a.gorithm to dea. with HDIC problems.

关键词： cla.sifier ensemble fea.ure tra.sforma.ion high-dimensiona. da.a.cla.sifica.ion imba.a.ced lea.ning observa.ion point mecha.ism

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a.novel observa.ion points‐ba.ed positive‐unla.eled lea.ning a.gorithm

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Ca.I Tra.sa.tions on Intelligence Technology 2023年第4期8卷 1425-1443页

作者： Yulin He Xu Li Ma.jing Zha.g Philippe fournier‐Viger Joshua.Zhexue Hua.g Sa.ma. Sa.loum Gua.gdong La.ora.ory of a.tificia. Intelligence a.d Digita. Economy(SZ) ShenzhenChina College of Computer Science a.d Softwa.e Engineering Shenzhen UniversityShenzhenChina School of Computing National University of SingaporeSingaporeSingapore

In this study,a. observa.ion points‐ba.ed positive‐unla.eled lea.ning a.gorithm(hence ca.led OP‐PUL)is proposed to dea. with positive‐unla.eled lea.ning(PUL)ta.ks by judiciously a.signing highly credible la.els to unla.eled *** proposed OP‐PUL a.gorithm ha. three ***,a. observa.ion point cla.sifier ensemble(OPCE)a.gorithm is constructed to divide unla.eled sa.ples into two ca.egories,which a.e tempora.y positive a.d perma.ent nega.ive ***,a.tempora.y OPC(TOPC)is tra.ned ba.ed on the combina.ion of origina. positive sa.ples a.d perma.ent nega.ive sa.ples a.d then the perma.ent positive sa.ples tha. a.e correctly cla.sified with TOPC a.e reta.ned from the tempora.y positive ***,a.perma.ent OPC(POPC)is fina.ly tra.ned ba.ed on the combina.ion of origina. positive sa.ples,perma.ent positive sa.ples a.d perma.ent nega.ive *** exha.stive experimenta. eva.ua.ion is conducted to va.ida.e the fea.ibility,ra.iona.ity a.d effectiveness of the OP‐PUL a.gorithm,using 30 benchma.k PU da.a.*** show tha.(1)the OP‐PUL a.gorithm is sta.le a.d robust a. unla.eled sa.ples a.d positive sa.ples a.e increa.ed in unla.eled da.a.sets a.d(2)the perma.ent positive sa.ples ha.e a.consistent proba.ility distribution with the origina. positive ***,a.sta.istica. a.a.ysis revea.s tha. POPC in the OP‐PUL a.gorithm ca. yield better PUL performa.ces on the 30 da.a.sets in compa.ison with four well‐known PUL *** demonstra.es tha. OP‐PUL is a.via.le a.gorithm to dea. with PUL ta.ks.

关键词： a.tificia. intelligence da.a.ining,ma.hine lea.ning

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Eva.ua.ion of follow-up a.d long-term outcomes of gunshot a.d sta. wounds in a.French civilia. popula.ion

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Chinese Journa. of Tra.ma.ology 2022年第4期25卷 201-208页

作者： Julie fournier La.re Sa.ou-Regis Ghisla.n Pa.lea. Gera.dine Goin Bruno de La.Villeon Yva.n Gouda.d Emergency Depa.tment Laveran Military HospitalBoulevard Laveran13013MarseilleFrance Viscera. a.d Digestive Surgery Unit Laveran Military HospitalBoulevard Laveran13013MarseilleFrance

Purpose The da.a.concerning long-term follow-up a.d outcomes of penetra.ing tra.ma.a.e poorly deta.led in the *** ma.n objective of our study wa. to a.a.yze the hospita. a.d extra.hospita. follow-up of penetra.ing tra.ma.victims a.d to eva.ua.e the la.e complica.ions a.d long-term consequences of these *** This work wa. a.retrospective longitudina. monocentric observa.iona. study conducted a. La.era. Milita.y Hospita.,from Ja.ua.y 2007 to Ja.ua.y *** pa.ients hospita.ized for gunshot wound or sta. wound ma.a.ement during this period were identified via.a.retrospective systema.ic query in the hospita. informa.ion system using the ICD-10 *** da.a.tra.ma.ism cha.a.teristics,hospita. ma.a.ement,follow-up a.d tra.ma.ism consequences(i.e.,persistent disa.ility)were *** improve eva.ua.ion of tra.ma.ism long-term consequences,extra.hospita. follow-up da.a.from genera. physicia.s(GP)were collected by phone *** this interview,9 closed questions were a.ked to the *** survey eva.ua.ed:the da.e of the la.t consulta.ion rela.ed to injury with the GP,the specific follow-up ca.ried out by the GP,tra.ma.ism consequences,a.d recurrence of ***,univa.ia.e a.d multiva.ia.e with regression a.a.ysis were used for sta.istica. *** a.tota. number of 165 pa.ients were ***(Q1,Q3)of hospita. follow-up wa. 28(4,66)*** hundred one pa.ients(61.2%)went to their one-month consulta.ion a. *** follow-up wa. a.hieved for 76 pa.ients(55.2%).Media.(Q1,Q3)of GP follow-up wa. 47(21,75)***-four pa.ients(14.5%)ha.e been tota.ly lost to follow *** overa.l follow-up identified 54 pa.ients(32.7%)with long-term consequences,20 being psychia.ric disorders a.d 30 orga.ic *** consequences were ma.nly periphera. nerve da.a.es(n=20;12.1%).Most of the psychia.ric consequences were dia.nosed during GP follow-up(n=14;70%).Seventeen ca.es(10.3%)of recurrence were found a.d la

关键词： Sta. wound Gunshot wound Injury Consequences Follow-up Outcomes

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Immunotoxic effects of a. industria. wa.te incinera.ion site on groundwa.er in ra.nbow trout (Oncorhynchus mykiss)

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Journa. of Environmenta. Sciences 2014年第5期26卷 981-990页

作者： Na.jet Bencha.go Fra.ois Ga.n Michel fournier INRS-Institut a.ma.d-Fra.pier Emerging Methods Aquatic Contaminant Research Division

The discha.ge of orga.ic wa.te from the petrochemica. industry into the Mercier la.oons ca.sed ma.or groundwa.er conta.ina.ion. The objective of this study wa. to determine the immunotoxic potentia. of three groundwa.er wells a. increa.ing dista.ce from the incinera.or dumping site （1.17, 2.74 a.d 5.40 km）. Ra.nbow Trout were exposed to increa.ing concentra.ions of wa.er from three groundwa.er wells for 14 da.s. Immunocompetence wa. cha.a.terized by pha.ocytosis, mitogen-stimula.ed prolifera.ion of lymphocytes, cell cycle a.a.ysis a.d a.optosis. a.significa.t increa.e in inna.e （pha.ocytosis） a.d specific immune response （B lymphocyte prolifera.ion） wa. observed in trout exposed to wa.er collected from the well a. 2.74 km. However, pha.ocytosis a.tivity wa. suppressed in groups a. 1.17 a.d 5.40 km. The proportion of lymphocytes in S pha.e wa. significa.tly increa.ed in groups a. 2.74 a.d 5.40 kin, while lymphocytes in G0/G1 pha.e were decrea.ed in a.l three exposure groups. a.ditiona.ly, dexa.etha.one （DEX）-induced a.optosis of lymphocytes wa. significa.tly reduced in the group a. 2.74 km, which suggests decrea.ed lymphocyte turnover. Furthermore, the ra.io of DEX- induced a.optosis/a.optosis wa. lower in the groups a. 2.74 a.d 5.40 km. In summa.y, our experiments ha.e shown tha. exposure to the mixture of orga.ic compounds present in Mercier groundwa.er modula.es pha.ocytosis a.d cell prolifera.ion, disrupts the cell cycle a.d reduces the ra.io of DEX- induced a.optosis/a.optosis. It is concluded tha. groundwa.er collected in the vicinity of a. incinera.or conta.nment field could impa.t immunocompetence in fish.

关键词： groundwa.er pha.ocytosis lymphocyte prolifera.ion cell cycle a.optosis ra.nbow trout

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Developing Project Dura.ion Models in Softwa.e Engineering

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Journa. of Computer Science & Technology 2007年第3期22卷 348-357页

作者： Pierre Bourque Serge Oligny a.a.n a.ra. Bertra.d fournier cole de Technologie Supérieure Montréa. QuébecCanada Bell Ca.a.a.Montréa. QuébecCanada Université du Québec à Montréa. Montréa. QuébecCanada

Ba.ed on the empirica. a.a.ysis of da.a.conta.ned in the Interna.iona. Softwa.e Benchma.king Sta.da.ds Group （ISBSG） repository, this pa.er presents softwa.e engineering project dura.ion models ba.ed on project effort. Dura.ion models a.e built for the entire da.a.et a.d for subsets of projects developed for persona. computer, mid-ra.ge a.d ma.nfra.e pla.forms. Dura.ion models a.e a.so constructed for projects requiring fewer tha. 400 person-hours of effort a.d for projects requiring more tha. 400 person-hours of effort. The usefulness of a.ding the ma.imum number of a.signed resources a. a.second independent va.ia.le to expla.n dura.ion is a.so a.a.yzed. The opportunity to build dura.ion models directly from project functiona. size in function points is investiga.ed a. well.

关键词： interna.iona. softwa.e benchma.king sta.da.ds group (ISBSG) project dura.ion models project scheduling models schedule a.d orga.iza.iona. issues softwa.e engineering time estima.ion

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