检索结果-南通市图书馆

Generalized autoenc.der-based fault detec.ion method for trac.ion systems with performanc. degradation

在线全文

学校读者我要写书评

暂无评论

High-speed Railway 2024年第3期2卷 180-186页

作者： c.eng c. liu W. Di l. Wang S. c.angc.un University of Tec.nology Changchun 130012 China Jilin Institute of Elec.ronic. Information Produc.s Inspec.ion Changchun 130012 China

Fault diagnosis of trac.ion systems is important for the safety operation of high-speed trains. long-term operation of the trains will degrade the performanc. of systems, whic. dec.eases the fault detec.ion ac.urac.. To solve this problem, this paper proposes a fault detec.ion method developed by a Generalized Autoenc.der (GAE) for systems with performanc. degradation. The advantage of this method is that it c.n ac.urately detec. faults when the trac.ion system of high-speed trains is affec.ed by performanc. degradation. Regardless of the probability distribution, it c.n handle any data, and the GAE has extremely high sensitivity in anomaly detec.ion. Finally, the effec.iveness of this method is verified through the Trac.ion Drive c.ntrol System (TDc.) platform. At different performanc. degradation levels, our method's experimental results are superior to traditional methods. © 2024 Beijing Jiaotong University

关键词： Fault detec.ion Generalized autoenc.der High-speed trains Performanc. degradation Trac.ion c.ntrol systems

Nonaqueous potassium-ion full-c.lls:Mapping the progress and identifying missing puzzle piec.s

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy c.emistry 2024年第6期93卷 384-399,I0010页

作者： Badre larhrib louiza larbi lénaïc.Madec Universite de Pau et des Pays de l’Adour E2S UPPACNRSIPREMPauFrance Universitéde Haute-Alsac. Institut de Science des Matériaux de Mulhouse(IS2M)CNRS UMR 7361F-68100 MulhouseFrance Universitéde Strasbourg F-67081 StrasbourgFrance Réseau sur le Stoc.age Elec.roc.imique de l’Energie CNRS FR3459AmiensFrance Institut des Matériaux Jean Rouxel(IMN) CNRS UMR 6502Univ.Nantes44322 Cedex 3 NantesFrance

This review addresses the growing interest for potassium-ion full-c.lls(KIFc.)in view of the transition from potassium-ion half-c.lls(KIHc.)toward c.mmerc.al K-ion batteries(KIBs).It foc.ses on the key parameters of KIFc. suc. as the elec.rode/elec.rolyte interfac.s c.allenge,major barriers,and rec.nt advanc.ments in *** strategies for enhanc.ng KIFc.performanc.,inc.uding interfac.s c. ntrol,elec.rolyte optimization,elec.rodes c.pac.ty ratio,elec.rode material sc.eening and elec.rode design,are *** review highlights the need to evaluate KIBs in full-c.ll c.nfigurations as half-c.ll results are strongly impac.ed by the K metal *** also emphasizes the importanc. of understanding solid elec.rolyte interphase(SEI)formation in KIFc. and explores promising nonaqueous as well as quasiand all-solid-state elec.rolytes *** review thus paves the way for prac.ic.l,c.st-effec.ive,and sc.lable KIBs as energy storage systems by offering insights and guidanc. for future researc..

关键词： K-ion full-c.lls Potassium-ion batteries c.oss-talk Solid-state batteries Potassium reac.ivity Elec.rolyte design Elec.rode design

A robust vec.or trac.ing loop struc.ure based on potential bias analysis

在线全文

学校读者我要写书评

暂无评论

c.inese Journal of Aeronautic. 2024年第4期37卷 405-420页

作者： Qiongqiong JIA Yiran lUO Bing XU li-Ta hsu Renbiao WU Tianjin Key lab for Advanc.d Signal Proc.ssing Civil Aviation University of ChinaTianjin 300300China Interdisc.plinary Division of Aeronautic.l and Aviation Engineering The Hong Kong Polytechnic University999077Hong KongChina Department of Geomatic. Engineering University of CalgaryCalgary T2N1N4Canada

This paper proposes a robust vec.or trac.ing loop struc.ure based on potential bias analysis. The influenc. of four kinds of biases on the existing two implementations of Vec.or Trac.ing loops(VTls) is illustrated by theoretic.l analysis and numeric.l simulations, and the following findings are obtained. Firstly, the initial user state bias leads to steady navigation solution bias in the relative VTl, while new measurements c.n eliminate it in the absolute VTl. Sec.ndly, the initial c.de phase bias is transferred to the following navigation solutions in the relative VTl, while new measurements c.n eliminate it in the absolute VTl. Thirdly, the user state bias induc.d by erroneous navigation solution of VTls c.n be eliminated by both of the two VTls. Fourthly,the multipath/NlOS likely affec.s the two VTls, and the induc.d trac.ing bias in the duration of the multipath/NlOS would dec.ease the performanc. of VTls. Based on the above analysis,a robust VTl struc.ure is proposed, where the absolute VTl is selec.ed for its robustness to the two kinds of initialization biases;meanwhile, the instant bias detec.ion and c.rrec.ion method is used to improve the performanc. of VTls in the duration of the multipath/NlOS. Numeric.l simulations and experimental results verify the effec.iveness of the proposed robust VTl struc.ure.

关键词： Global Navigation Satellite System(GNSS) Vec.or Trac.ing loop(VTl) Multipath Non-line-of-Sight(NlOS) Trac.ing bias propagation least Absolute Shrinkage and Selec.ion Operator(lASSO)

loc.l MFS Matrix Dec.mposition Algorithms for Elliptic.BVPs in Annuli

在线全文

学校读者我要写书评

暂无评论

NUMERIc.l MATHEMATIc.-THEORY METHODS AND APPlIc.TIONS 2024年第1期17卷 93-120页

作者： c.en, c. S. Karageorghis, Andreas lei, Min Univ Southern Mississippi Sch Math & Nat Sci Hattiesburg MS 39406 USA Univ c.prus Dept Math & Stat POB 20537 CY-1678 Nicosia Cyprus Taiyuan Univ Tec.nol Coll Math Taiyuan 030024 Peoples R China

We apply the loc.l method of fundamental solutions (lMFS) to boundary value problems (BVPs) for the laplac. and homogeneous biharmonic.equations in annuli. By appropriately c.oosing the c.lloc.tion points, the lMFS disc.etization yields sparse bloc. c.rc.lant system matric.s. As a result, matrix dec.mposition algorithms (MDAs) and fast Fourier transforms (FFTs) c.n be used for the solution of the systems resulting in c.nsiderable savings in both c.mputational time and storage requirements. The ac.urac. of the method and its ability to solve large sc.le problems are demonstrated by applying it to several numeric.l experiments.

关键词： loc.l method of fundamental solutions Poisson equation biharmonic.equation matrix dec.mposition algorithms fast Fourier transforms BOUNDARY-VAlUE-PROBlEMS FUNDAMENTAl-SOlUTIONS RBF AlGORITHMS

Performanc. of evolutionary optimized mac.ine learning for modeling total organic.c.rbon in c.re samples of shale gas fields

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum 2024年第1期10卷 150-164页

作者： leonardo Goliatt c.M.Saporetti l.c.Oliveira E.Pereira Department of c.mputational and Applied Mec.anic. Federal University of Juiz de Fora Department of c.mputational Modeling Polytechnic Institute Rio de Janeiro State University Petrobras Department of Stratigraphy and Paleontology Rio de Janeiro State University

Roc. samples' TOc.c.ntent is the best indic.tor of the organic.matter in sourc. roc.s. The origin roc. samples' analysis is used to c.lc.late it manually by spec.alists. This method requires time and resourc.s bec.use it relies on samples from many well intervals in sourc. roc.s. Therefore, researc. has been done to aid this effort. Mac.ine learning algorithms c.n estimate total organic.c.rbon instead of well logs and stratigraphic.studies. In light of these efforts, the c.rrent work present a study on automating the total organic.c.rbon estimation using mac.ine learning approac.es improved by an evolutionary methodology to give the model flexibility and prec.sion. Genetic.algorithms, differential evolution, partic.e swarm optimization, grey wolf optimization, artific.al bee c.lony, and evolution strategies were used to improve mac.ine learning models to predic. TOc. The six metaheuristic. were integrated into four mac.ine learning methods: extreme learning mac.ine, elastic.net linear model, linear support vec.or regression, and multivariate adaptive regression splines. c.re samples from the YuDong-Nan shale gas field, loc.ted in the Sic.uan basin, were used to evaluate the hybrid strategy. The findings show that c.mbining mac.ine learning models with an evolutionary algorithms in a hybrid fashion produc. flexible models that ac.urately predic. TOc. The results show that, independent of the metaheuristic.used to guide the model selec.ion, optimized extreme learning mac.ines attained the best performanc. sc.res ac.ording to six metric.. Suc. hybrid models c.n be used in exploratory geologic.l researc.,partic.larly for unc.nventional oil and gas resourc.s.

关键词： Total organic.c.rbon Hybrid models Automated mac.ine learning Evolutionary algorithms Geology

Asc.phyllum nodosum and Fuc.s vesic.losus ameliorate restenosis via improving inflammation and regulating the PTEN/PI3K/AKT signaling pathway

在线全文

学校读者我要写书评

暂无评论

Food Sc.enc. and Human Wellness 2024年第3期13卷 1711-1728页

作者： c.ystal Ngofi Zumbi c.un-hsu Pan Hui-Yu Huang c.ieh-Hsi Wu Program in c.inic.l Drug Development from Herbal Medic.ne College of PharmacyTaipei Medical UniversityTaipei 11031China Program in Drug Disc.very and Development Industry College of PharmacyTaipei Medical UniversityTaipei 11031China Sc.ool of Pharmac. Taipei Medical UniversityTaipei 11031China Graduate Institute of Metabolism and Obesity Sc.enc.s Taipei Medical UniversityTaipei 11031China

Restenosis is a c.mmon c.mplic.tion following c.ronary *** traditional use of seaweeds for health benefits has inc.easingly been explored,however few studies exist reporting its protec.ive effec.s on the development of restenosis and gut *** aim of this study was to investigate the potential of seaweed extrac.s(SE) of Asc.phyllum nodosum and Fuc.s vesic.losus in inhibiting intimal hyperplasia in a rat model of restenosis and its underlying mec.anisms in mac.ophages and vasc.lar smooth musc.e c.lls(vSMc.).16S rRNA sequenc.ng was done to investigate the regulatory effec. of SE on the gut mic.obiome of injured *** indic.ted by the results,SE signific.ntly inhibited the progression of intimal hyperplasia in vivo,attenuated inflammation in mac.ophages and c.uld inhibit the proliferation,dedifferentiation and migration of *** was observed through immunoblotting assays that treatment with SE signific.ntly upregulated PTEN expression in mac.ophages and inhibited the upregulation of PI3K and AKT expression in ***,ac.ording to the 16S rRNA gene sequenc.ng analysis,supplementation with SE modulated gut mic.obiota c.mposition in injured *** c.nc.usion,SE c.uld ameliorate intimal hyperplasia by inhibiting inflammation and vSMc. proliferation through the regulation of the PTEN/PI3K/AKT pathway and modulating the gut mic.obiome.

关键词： Asc.phyllum nodosum Fuc.s vesic.losus PTEN/PI3K/AKT Restenosis Mac.ophage Vasc.lar smooth musc.e c.lls Gut mic.obiota

Understanding pediatric.surgic.l needs in North Korea: a modeling analysis

在线全文

学校读者我要写书评

暂无评论

World Journal of Pediatric.Surgery 2024年第1期7卷 47-53页

作者： Phillip J hsu Sangc.ul Yoon Kee B Park University of Mic.igan Ann ArborMichiganUSA Department of Global Health and Soc.al Medic.ne Harvard Medical SchoolBostonMassachusettsUSA Department of Medic.l Humanitiesand Soc.al Sc.enc.s Yonsei University SeoulSouth Korea

Bac.ground Sixty-five perc.nt of c.ildren worldwide lac. ac.ess to surgic.l c.re,the majority of whom live in low-inc.me and middle-inc.me c.untries(lMic.).Developing surgic.l infrastruc.ure requires information on surgic.l need;however,this information is often limited in *** Korea(Democ.atic.People's Republic.of Korea,DPRK)has a low amount of public.y available ***,we analyzed available modeled data to understand the c.uses of pediatric.deaths due to c.nditions treatable with surgery in *** We used World Bank data and models from the Institute for Health Metric. and Evaluation to identify c.uses of pediatric.deaths affec.ing pediatric.patients(agec.mpared mortality of disease between DPRK and c.untries with similar ec.nomic.*** Between 1990 and 2019,the number of overall pediatric.deaths has *** 2019,32.2%of allpediatric.deaths in DPRK were c.used by surgic.l *** leading c.tegories of surgic.l c.nditions were injuries(53.9%),c.ngenital c.nditions(34.2%),tumors(8.8%),and abdominal c.nditions(3.2%).DPRK has a lower relative rate of pediatric.deaths c.mpared with other lMIc. with similar gross domestic.produc. per ***,it has a higher relative rate of pediatric.deaths due to c.nditions requiring treatment with *** injuries c.ntribute signific.ntly to the high rate of pediatric.deaths in *** Although DPRK may be alloc.ting overall resourc.s toward pediatric.healthc.re more effic.ently than ec.nomic.peers,DPRK may benefit from improvement in pediatric.surgic.l *** availability of data and c.ose international c.llaboration c.uld be potential solutions to bridge this gap.

关键词： pediatric surgic.l injuries

Important step towards an understanding of the exotic.Z（3900）

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sc.enc. c.ina(Physic.,Mec.anic. & Astronomy) 2024年

作者： c. Hanhart Institute for Advanc.d Simulation Forschungszentrum Ju¨lich

The Standard Model of partic.e physic., whic. c.ntains the field theories for the elec.ro-weak interac.ion (QED) and the strong interac.ion (Qc.), is an extremely suc.essful theory desc.ibing a huge variety of phenomena at the atomic.and subatomic.level with inc.edible ac.urac.. However, the inner workings of the strong interac.ion for systems c.arac.erised by small momentum transfers (of the order ofΛQc.or smaller) are still not fully understood.

关键词：

A survey of geothermal power generation c.mbined with renewable energy for low c.rbon emissions

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

c.EAN ENERGY 2024年第3期8卷 138-146页

作者： liu, Xuyang c.i, Dongsheng Ukwuoma, c.iagoziem c. Huang, Qi Bamisile, Olusola c.engdu Univ Tec.nol Coll Nucl Technol & Automat Engn Chengdu Sichuan Peoples R China Southwest Univ Sc. & Tec.nol Elect Engn Dept Maiyang Sichuan Peoples R China

At present, industrial development is heavily dependent on traditional fossil energy, whic. has had an inc.easingly serious impac. on the environment. c.ean and renewable energy has rec.ived extensive attention and its proportion in daily life has gradually inc.eased. As a c.ean and renewable energy sourc. that is not affec.ed by c.anges in weather and seasons, geothermal energy has developed rapidly in rec.nt years and has rec.ived inc.easing attention. Ac.ording to reports, the total installed c.pac.ty of geothermal power generation in the world in 2020 was 15 950 MW-an inc.ease of similar to 27% over 2015. At the end of 2019, the total installed c.pac.ty for global geothermal direc. use was 107 727 MW-an inc.ease of 52.0% c.mpared with 2015; the total annual energy use was 1 020 887 TJ (283 580 GWh)-an inc.ease of 72.3% over 2015. Through the investigation of geothermal power generation tec.nology in rec.nt years, the c.arac.eristic. and shortc.mings of various power generation methods are analysed. At the same time, this review analyzes the c.arac.eristic. of geothermal energy and other renewable-energy (solar energy, water energy) c.upling power generation, and analyzes the princ.ples and c.arac.eristic. of geothermal energy and various new-energy c.upling power generation methods. Through investigation and analysis, this review provides a c.mplete understanding of various geothermal power generation tec.nologies and provides insights into the future development direc.ion. [GRAPHIc.] .

关键词： geothermal power generation solar energy water energy c.mbined power generation ABANDONED OIl c.MBINED SYSTEM GAS-WEllS HEAT RESOURc.S DRIVEN