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An Adapti.e Data-dri.en Method Based on Fuzzy Logi. for Determi.i.g Power System Voltage Status

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 707-718页

作者： Si.wan Shazdeh Hêmi. Golpîra Hassan Bevrani the SMGRC University of KurdistanSanandajIran Power Systems Modeli.g&Si.ulati.n Lab Department of Electrical EngineeringUniversity of KurdistanKurdistanSanandaj 66177-15175Iran

Thi. paper proposes an adapti.e method based on fuzzy logi. that uti.i.es data from phasor measurement uni.s(PMUs) to assess and classi.y generati.g-si.e voltage trajectori.s. The voltage vari.ble and i.s associ.ted deri.ati.es are used as the i.put vari.bles of a fuzzy-logi. block. i. addi.i.n, the voltage trajectory i. compared wi.h the pre-selected pi.ot-bus voltage to make a reli.ble deci.i.n about the voltage operati.nal state. Di.ferent types of short-term voltage dynami.s are consi.ered i. the proposed method. The fuzzy membershi. functi.ns are determi.ed usi.g a systemati. method that consi.ers the current si.uati.n of the voltage trajectory. Fi.ally, the voltage status i. categori.ed i.to four classes to determi.e appropri.te remedi.l acti.ns. The proposed method i. vali.ated on a i.EE 73-bus power system i. a MATLAB envi.onment.

关键词： Fuzzy logi. fault-i.duced delayed voltage recovery phasor measurement uni.(PMU) short-term voltage stabi.i.y si.uati.nal awareness voltage classi.i.ati.n

Severe aspi.ati.n pneumoni. i. the elderly

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Journal of i.tensi.e Medi.i.e 2024年第3期4卷 307-317页

作者： Sebasti.n Ocrospoma Marcos i.Restrepo Di.i.i.n of Pulmonary Di.eases&Cri.i.al Care Medi.i.e University of Texas Health San AntonioSan AntonioTXUSA Secti.n of Pulmonary&Cri.i.al Care Medi.i.e South Texas Veterans Health Care SystemSan AntonioTXUSA

The global populati.n i. agi.g at an unprecedented rate,resulti.g i. a growi.g and vulnerable elderly populati.n i. need of effi.i.nt comprehensi.e healthcare servi.es that i.clude long-term care and ski.led nursi.g *** thi. context,severe aspi.ati.n pneumoni.,a condi.i.n that carri.s substanti.l morbi.i.y,mortali.y,and fi.anci.l burden,especi.lly among elderly pati.nts requi.i.g admi.si.n to the i.tensi.e care uni.,has attracted greater *** pneumoni. i. defi.ed as a pulmonary i.fecti.n related to aspi.ati.n or dysphagi. i. *** epi.odes of coughi.g on food or li.ui. i.take,a hi.tory of relevant underlyi.g condi.i.ns,abnormali.i.s on vi.eofluoroscopy or water swallowi.g,and gravi.y-dependent shadow di.tri.uti.n on chest i.agi.g are among the clues that suggest *** wi.h aspi.ati.n pneumoni. tend to be elderly,frai.,and sufferi.g from more comorbi.i.i.s than those wi.hout thi. ***,we comprehensi.ely address the epi.emi.logy,cli.i.al characteri.ti.s,di.gnosi.,treatment,preventi.n,and prognosi. of severe aspi.ati.n communi.y-acqui.ed pneumoni. i. the elderly to opti.i.e care of thi. hi.h-ri.k demographi.,enhance outcomes,and mi.i.i.e the healthcare costs associ.ted wi.h thi. *** preventi.e measures and effecti.e management strategi.s i. vi.al i. ensuri.g the well-bei.g of our agi.g populati.n.

关键词： Aspi.ati.n pneumoni. Aged Cri.i.al i.lness Swallowi.g di.orders Frai.ty Anti.acteri.l agents

Understandi.g the Theory of Karp, Mi.ler and Wi.ograd

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Journal of Appli.d Mathemati.s and Physi.s 2024年第4期12卷 1203-1236页

作者： Athanasi.s i. Margari. Department of Di.i.al Systems Gaiopolis Campus University of Thessaly Larissa Greece

The objecti.e of thi. tutori.l i. to present the fundamental theory of Karp, Mi.ler and Wi.ograd, whose semi.al paper lai. the foundati.ns regardi.g the systemati. descri.ti.n of the organi.ati.n of computati.ns i. systems of uni.orm recurrent equati.ns by means of graph structures, vi. the defi.i.i.n of computabi.i.y condi.i.ns and techni.ues for the constructi.n of one-di.ensi.nal and multi.di.ensi.nal scheduli.g functi.ns. Besi.es the descri.ti.n of thi. theory, the paper presents i.provements and revi.i.ns made by other authors and furthermore, poi.ts out the di.ferences regardi.g the condi.i.ns of causali.y and dependency between the general case of systems of recurrent equati.ns and the speci.l case of multi.le nested loops.

关键词： Computabi.i.y Scheduli.g Computati.ns Recurrent Equati.ns

Evoluti.n of Vi.al Load i. Pati.nts i.fected wi.h Hi.-1 at Poi.t G Uni.ersi.y Hospi.al

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Open Journal of Medi.al Mi.robi.logy 2024年第1期14卷 66-76页

作者： A. Mai.a D. Kone D. M. Couli.aly Ag M. Barai.a A. Traore S. S. Di.ki.e i. i. Mai.a i. Konate A. i. Mai.a Faculty of Medi.i.e and Odontostomatology of Bamako (FMOS) University of Science of Technical and Technology De Bamako Bamako Mali Laboratory of Medi.al Bi.logy and Hospi.al Hygi.ne of Poi.t-G Uni.ersi.y Hospi.al Bamako Mali Faculty of Pharmacy of Bamako (FaPh) University of Science of Technical and Technology De Bamako Bamako Mali Laboratory of the Luxembourg Mother-Chi.d Hospi.al Bamako Mali Nati.nal i.sti.ute of Publi. Health Bamako Mali Nati.nal i.sti.ute for Trai.i.g i. Health Sci.nces Bamako Mali Laboratory of the Kati.Uni.ersi.y Hospi.al Center Bamako Mali i.fecti.us and Tropi.al Di.eases Department of Poi.t-G Uni.ersi.y Hospi.al Bamako Mali Laboratory of CHU Gabri.l Touré Bamako Mali

i.troducti.n: Hi., the human i.munodefi.i.ncy vi.us, i. the eti.logi.al agent of acqui.ed i.munodefi.i.ncy syndrome (Ai.S). The ai. of thi. study was to assess the evoluti.n of the vi.al load i. pati.nts under treatment. Methodology: Thi. was a study carri.d out from July 2017 to June 2022 at the Poi.t G Uni.ersi.y Hospi.al laboratory. The determi.ati.n of the vi.al load of pati.nts was carri.d out by PCR on the ABOTT M2000sp/rt platform. Results: A total of 129 pati.nts i.fected wi.h Hi.-1, aged 19 to 72 years wi.h a mean age of 40.05 years ± 10.71;all on anti.etrovi.al chemotherapy. The female gender predomi.ated among our pati.nts. The most common treatment regi.en was 2i.Ti.+ 1i.NTi.wi.h 72.9% followed by 2i.Ti.+ 1i.i.wi.h 13.2%. As for the combi.ati.ns of molecules, the combi.ati.n TDF + 3TC + EFV and TDF + 3TC + DTG predomi.ated, respecti.ely 65.1% and 13.2%. 89.9% of our pati.nts had undetectable vi.emi. after 12 months of treatment (p i.h an average vi.al load whi.h had evolved from 681315.65 copi.s/ml ± 1616908.484 to M0 at 5742.36 copi.s /ml ± 35756.883 at M12 (p Conclusi.n: Generally speaki.g, anti.etrovi.al treatment had contri.uted to controlli.g vi.al loads, however the therapeuti. combi.ati.n TDF + 3TC + DTG had made i. possi.le to obtai. more pati.nts wi.h undetectable vi.emi. i.stead.

关键词： Hi.-1 Treatment Vi.al Load Poi.t G Uni.ersi.y Hospi.al

Change i. Grai.-Si.e Composi.i.n of Li.ni.e under Cycli. Freezi.g-Thawi.g and Wetti.g-Dryi.g

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Natural Resources 2024年第1期15卷 17-27页

作者： Natali. S. Batugi.a Vladi.lav i. Fedorov Chersky i.sti.ute of Mi.i.g of the North Si.eri.n Branch Russi.n Academy of Sci.nces Yakutsk Russia

The paper presents the change i. grai.-si.e composi.i.n of li.ni.e under cycli. freezi.g-thawi.g (FTC) and wetti.g-dryi.g (WDC). The arti.le shows that i. the spri.g and autumn peri.ds the li.ni.es can be subjected to repeated freezi.g-thawi.g and wetti.g-dryi.g, whi.h determi.es the possi.i.i.y of changi.g thei. grai.-si.e composi.i.n and structure. Experi.ental studi.s i. laboratory condi.i.ns on the i.fluence of cycli. freezi.g-thawi.g (FTC) and wetti.g-dryi.g (WDC) on the quali.y i.di.ators of li.ni.es have been carri.d out, thei. granulometri. (fracti.nal) composi.i.n has been studi.d. Freezi.g-thawi.g cycle condi.i.ns are as follows (FTC): mi.i.um exposure temperature: -20°C;maxi.um: +5°C;relati.e humi.i.y: 30%;number of processi.g cycles: 3. Wetti.g-dryi.g cycles are as follows (WDC): dryi.g temperatures are +20, +40, +60, +80°C, dryi.g ti.e 90 mi.utes, the coals are further subjected to rai. (soaki.g) for a peri.d of water saturati.n to humi.i.y of 30% - 40% and dry agai.. The number of wetti.g-dryi.g cycles i. 3 ti.es. The tests have revealed the destructi.e effects of FTC and WDC on the samples of lower metamorphi. grade coal, and the cycles of wet-dry lead to the much hi.her yi.ld of fi.e si.es (-6+0;-13+0 mm) than the cycles of freeze-thaw. Furthermore, i. i. found that the i.crease i. the yi.ld of fi.es depends on the heati.g temperature: coal di.i.tegrati.n proceeds more i.tensi.ely at a hi.her temperature of dryi.g.

关键词： Li.ni.e Freezi.g-Thawi.g Cycle Wetti.g-Dryi.g Cycle Grai. Si.e Composi.i.n Dust Coal Storage Loss Quali.y

A Di.ensi.nal Reducti.n Approach Based on Essenti.l Constrai.ts i. Li.ear Programmi.g

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Ameri.an Journal of Operati.ns Research 2024年第1期14卷 1-31页

作者： Ei.i.i.i. Ni.olopoulou George S. Androulaki. Department of Mathemati.s University of Patras Patras Greece Department of Busi.ess Admi.i.trati.n University of Patras Patras Greece

Thi. paper presents a new di.ensi.n reducti.n strategy for medi.m and large-scale li.ear programmi.g problems. The proposed method uses a subset of the ori.i.al constrai.ts and combi.es two algori.hms: the wei.hted average and the cosi.e si.plex algori.hm. The fi.st approach i.enti.i.s bi.di.g constrai.ts by usi.g the wei.hted average of each constrai.t, whereas the second algori.hm i. based on the cosi.e si.i.ari.y between the vector of the objecti.e functi.n and the constrai.ts. These two approaches are complementary, and when used together, they locate the essenti.l subset of i.i.i.l constrai.ts requi.ed for solvi.g medi.m and large-scale li.ear programmi.g problems. After reduci.g the di.ensi.n of the li.ear programmi.g problem usi.g the subset of the essenti.l constrai.ts, the soluti.n method can be chosen from any sui.able method for li.ear programmi.g. The proposed approach was appli.d to a set of well-known benchmarks as well as more than 2000 random medi.m and large-scale li.ear programmi.g problems. The results are promi.i.g, i.di.ati.g that the new approach contri.utes to the reducti.n of both the si.e of the problems and the total number of i.erati.ns requi.ed. A tree-based classi.i.ati.n model also confi.med the need for combi.i.g the two approaches. A detai.ed numeri.al example, the general numeri.al results, and the stati.ti.al analysi. for the deci.i.n tree procedure are presented.

关键词： Li.ear Programmi.g Bi.di.g Constrai.ts Di.ensi.n Reducti.n Cosi.e Si.i.ari.y Deci.i.n Analysi. Deci.i.n Trees

Prevalence of vi.ual i.pai.ment and esti.ati.n of refracti.e errors among school chi.dren i. Kakamega,Kenya

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i.ternati.nal Journal of Ophthalmology(Engli.h edi.i.n) 2024年第5期17卷 932-939页

作者： i.abel Si.nes-Soler Alfred ragot Shei.ah Nangena Andrew Wekesa raúl Montalbán Llamusí Department of Opti.s and Optometry and Vi.i.n Sci.nces Universidat de ValènciaBurjassotValencia 46010Spain NGO Vi.i.n Wi.hout Borders(Vi.i. Sense Fronteres VSF)Calpe 03710AlicanteSpain Masi.de Muli.o Uni.ersi.y of Sci.nce and Technology P.O Box 190-50100KakamegaKenya Cli.i.a Bavi.ra Ali.ante C/Ausóy Monzó 16Alicante 03006Spain

Ai.:To i.vesti.ate the prevalence of vi.ual i.pai.ment(Vi.and provi.e an esti.ati.n of uncorrected refracti.e errors i. school-aged chi.dren,conducted by optometry students as a communi.y ***:The study was *** 3343 parti.i.ants were i.cluded i. the *** i.i.i.l exami.ati.n i.volved assessi.g the uncorrected di.tance vi.ual acui.y(UDVA)and vi.ual acui.y(VA)whi.e usi.g a+2.00 D *** i.clusi.n cri.eri. for a subsequent comprehensi.e cycloplegi. eye exami.ati.n,performed by an optometri.t,were as follows:a UDVAi.al(0.20 logMAR)and/or a VA wi.h+2.00 D≥0.8 deci.al(0.96 logMAR).RESULTS:The sample had a mean age of 10.92±2.13y(range 4 to 17y),and 51.3%of the chi.dren were female(n=1715).The majori.y of the chi.dren(89.7%)fell wi.hi. the age range of 8 to *** the ethni. groups,the hi.hest representati.n was from the Luhya group(60.6%)followed by Luo(20.4%).Mean logMAR UDVA choosi.g the best eye for each student was 0.29±0.17(range 1.70 to 0.22).Out of the total,246 parti.i.ants(7.4%)had a full eye *** esti.ated prevalence of myopi.(defi.ed as spheri.al equi.alent≤-0.5 D)was found to be 1.45%of the total *** around 0.18%of the total sample had hyperopi. value exceedi.g+1.75 *** asti.mati.m(ci.i. 0.21%(7/3343)of the *** Vi.prevalence was 1.26%of the total *** our cases of Vi.76.2%could be attri.uted to uncorrected refracti.e *** was detected i. 0.66%(22/3343)of the screened *** was no stati.ti.ally si.ni.i.ant correlati.n observed between age or gender and refracti.e ***:The pri.ary cause of Vi.i. determi.ed to be uncorrected refracti.e errors,wi.h myopi. bei.g the most prevalent refracti.e error *** fi.di.gs underscore the si.ni.i.ance of early i.enti.i.ati.n and correcti.n of refracti.e errors i. school-aged chi.dren as a means to allevi.te the i.pact of Vi.

关键词： vi.ual i.pai.ment refracti.e errors myopi. amblyopi. sustai.able development goals

Usi.g fracture-based conti.uum modeli.g of coupled geomechani.al-hydrologi.al processes for numeri.al si.ulati.n of hydrauli. fracturi.g

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Journal of Rock Mechani.s and Geotechni.al Engi.eeri.g 2024年第5期16卷 1582-1599页

作者： Goodluck i.Ofoegbu GNO Modeli.g Research LLC. San AntonioTX78253USA

Thi. paper descri.es numeri.al si.ulati.n of hydrauli. fracturi.g usi.g fracture-based conti.uum modeli.g(FBCM)of coupled geomechani.al-hydrologi.al processes to evaluate a techni.ue for hi.h-densi.y fracturi.g and fracture *** si.ulati.ns are i.novati.e because of modeli.g di.crete fractures expli.i.ly i. conti.uum analysi..A key advantage of FBCM i. that fracture i.i.i.ti.n and propagati.n are modeled expli.i.ly wi.hout changi.g the domai. gri.(*** re-meshi.g).Further,multi.le reali.ati.ns of a preexi.ti.g fracture di.tri.uti.n can be analyzed usi.g the same domai. *** si.ulated hydrauli. fracturi.g techni.ue consi.ts of pressuri.i.g multi.le wells si.ultaneously:i.i.i.lly wi.hout permeati.g flui.s i.to the rock,to seed fractures uni.ormly and at hi.h densi.y i. the wall rock of the wells;followed by flui. i.jecti.n to propagate the seeded fracture densi.y *** combi.es the ease of conti.uum modeli.g wi.h the potenti.l accuracy of modeli.g di.crete fractures and fracturi.g *** are modeled as pi.cewi.e planar based on i.tersecti.ns wi.h domai. elements;fracture geometry stored as conti.uum properti.s i. used to calculate parameters needed to model i.di.i.ual fractures;and rock behavi.r i. modeled through tensori.l aggregati.n of the behavi.r of di.crete fractures and unfractured *** are presented for previ.usly unfractured rock and for rock wi.h preexi.ti.g fractures of hori.ontal,shallow-di.pi.g,steeply di.pi.g,or verti.al *** of a si.gle-well model are used to determi.e the pattern and spaci.g for a multi.le-well *** results i.lustrate hi.h-densi.y fracturi.g and fracture cagi.g through si.ultaneous flui. i.jecti.n i. multi.le wells:for previ.usly unfractured rock or rock wi.h preexi.ti.g shallow-di.pi.g or hori.ontal fractures,and i. si.u verti.al compressi.e stress greater than *** preexi.ti.g fractures are steeply di.pi.g or verti.al,and consi.eri.g the same i. si.u

关键词： Di.crete fracture Fracture-based conti.uum modeli.g Fracture cagi.g Hi.h-densi.y fracturi.g Hydrauli. fracturi.g Preexi.ti.g fracture

A Novel Approach for Developi.g a Li.ear Regressi.n Model wi.hi. Logi.ti. Cluster Usi.g Sci.i.-Learn

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Journal of Data Analysi. and i.formati.n Processi.g 2024年第3期12卷 348-369页

作者： Nwosu Ambrose Gi.bert i. O. Ai.ufua Choji.Davou Nyap Departments of Computer Sci.nces Nasarawa State University Keffi Nigeria Departments of Computer Sci.nces University of Jos Jos Nigeria

Due to the rapi. development of logi.ti. i.dustry, transportati.n cost i. also i.creasi.g, and fi.di.g trends i. transportati.n acti.i.i.s wi.l i.pact posi.i.ely i. i.vestment i. transportati.n i.frastructure. There i. li.i.ed li.erature and data-dri.en analysi. about trends i. transportati.n mode. Thi. thesi. delves i.to the operati.nal challenges of vehi.le performance management wi.hi. logi.ti.s clusters, a cri.i.al aspect of effi.i.nt supply chai. operati.ns. i. ai.s to address the i.sues faced by logi.ti.s organi.ati.ns i. opti.i.i.g thei. vehi.le fleets’ performance, essenti.l for seamless logi.ti.s operati.ns. The study’s core desi.n i.volves the development of a predi.ti.e logi.ti.s model based on regressi.n, focused on forecasti.g, and evaluati.g vehi.le performance i. logi.ti.s clusters. i. encompasses a comprehensi.e li.erature revi.w, research methodology, data sources, vari.bles, feature engi.eeri.g, and model trai.i.g and evaluati.n and F-test analysi. was done to i.enti.y and veri.y the relati.nshi.s between attri.utes and the target vari.ble. The fi.di.gs hi.hli.ht the model’s effi.acy, wi.h a low mean squared error (MSE) value of 3.42, i.di.ati.g i.s accuracy i. predi.ti.g performance metri.s. The hi.h R-squared (R2) score of 0.921 emphasi.es i.s abi.i.y to capture relati.nshi.s between i.put characteri.ti.s and performance metri.s. The model’s trai.i.g and testi.g accuracy further attest to i.s reli.bi.i.y and generali.ati.n capabi.i.i.s. i. i.terpretati.n, thi. research underscores the practi.al si.ni.i.ance of the fi.di.gs. The regressi.n-based model provi.es a practi.al soluti.n for the logi.ti.s i.dustry, enabli.g i.formed deci.i.ns regardi.g resource allocati.n, mai.tenance planni.g, and deli.ery route opti.i.ati.n. Thi. contri.utes to enhanced overall logi.ti.s performance and customer servi.e. By addressi.g performance gaps and embraci.g modern logi.ti.s technologi.s, the study supports the ongoi.g evoluti.n of vehi.le performance management

关键词： Mean Squared Error R2 Score F-Test MSE