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Stati. Model Classi.i.ati.n Status： Taki.g.i.to Account Emerg.ng.External Factors

Journal of Modern Accounti.g.and Audi.i.g 2013年第6期9卷 798-807页

作者： perminov g. i. Nati.nal Research Uni.ersi.y-Hi.0}er School of Economi.s Moscow Russia

Analysi. of the problem of predi.ti.g.bankruptcy shows that forei.0} and domesti. models i.cluded only i.ternal factors of enterpri.es. But the same i.di.ators of i.ternal factors i. the rapi.ly chang.ng.external envi.onment can lead to bankruptcy, and not i. others. External factors are the most dang.rous, because the possi.le i.fluence on them i. mi.i.al and the i.pact of thei. i.plementati.n can be devastati.g. Thi. paper focuses on the same factors to assess the i.pact of the macroeconomi. i.di.ators （extemal factors） on the parameters of stati. models predi.ti.g.a local approxi.ati.n of the cri.i. at the plant. To accompli.h the purpose, a Spark set of 100 compani.s was compi.ed, i.cludi.g.50 compani.s whi.h offi.i.lly declared bankruptcy i. the peri.d of 2000-2009 and 50 stable operati.g.compani.s wi.h a random sample of the same ti.e peri.d. External factors were extracted from the Joi.t Economi. and Soci.l Data Archi.e1 The author compared two data sets：（1） mi.roeconomi. i.di.ators--money to the total li.bi.i.i.s, retai.ed earni.g. to total assets, net profi. to revenue, Earni.g. Before i.terest and Taxes （EBi.） to assets, net i.come to equi.y, net profi. to total li.bi.i.i.s, current li.bi.i.i.s to total assets, the totali.y of short-term and long.term loans to total assets, current assets to current li.bi.i.i.s, assets to revenue, equi.y to total assets, and current assets to revenue; and （2） external factors--i.dex of real g.oss domesti. product （g.P）, i.dustri.l producti.n i.dex, the i.dex of real cash i.comes, an i.dex of real i.vestments, consumer pri.e i.dex, the refi.anci.g.rate, unemployment rate, the pri.e of electri.i.y, g.s pri.es, oi. pri.e, g.s pri.e, dollar to ruble, ruble euro Standard ＆ Poor （S＆P） i.dex, the Russi.n Tradi.g.System （RTS） i.dex, and reg.on. The ai. of the compari.on results pag.ng.classes ＂i.solvent＂ and ＂non-bankrupt＂ i. achi.ved usi.g.two methods： classi.i.ati.n and di.cri.i.ati.n. i. both methods, computati.nal procedures a

关键词： bankruptcy predi.ti.n external factors methods of classi.i.ati.n and di.cri.i.ati.n

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PUNet: A Semi.Supervi.ed Anomaly Detecti.n Model for Network Anomaly Detecti.n Based on Posi.i.e Unlabeled Data

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Computers, Materi.ls and Conti.ua 2024年第1期81卷 327-343页

作者： Long.g. Zhang.Z. Faculty of Computi.g Harbin Institute of Technology Harbin 150000 China

Network anomaly detecti.n plays a vi.al role i. safeg.ardi.g.network securi.y. However, the exi.ti.g.network anomaly detecti.n task i. typi.ally based on the one-class zero-posi.i.e scenari.. Thi. approach i. suscepti.le to overfi.ti.g.duri.g.the trai.i.g.process due to di.crepanci.s i. data di.tri.uti.n between the trai.i.g.set and the test set. Thi. phenomenon i. known as predi.ti.n dri.t. Addi.i.nally, the rari.y of anomaly data, often masked by normal data, further compli.ates network anomaly detecti.n. To address these challeng.s, we propose the PUNet network, whi.h i.g.ni.usly combi.es the streng.hs of tradi.i.nal machi.e learni.g.and deep learni.g.techni.ues for anomaly detecti.n. Speci.i.ally, PUNet employs a reconstructi.n-based autoencoder to pre-trai. normal data, enabli.g.the network to capture potenti.l features and correlati.ns wi.hi. the data. Subsequently, PUNet i.teg.ates a sampli.g.alg.ri.hm to construct a pseudo-label candi.ate set among.the outli.rs based on the reconstructi.n loss of the samples. Thi. approach effecti.ely mi.i.0}tes the predi.ti.n dri.t problem by i.corporati.g.abnormal samples. Furthermore, PUNet uti.i.es the CatBoost classi.i.r for anomaly detecti.n to tackle potenti.l data i.balance i.sues wi.hi. the candi.ate set. Extensi.e experi.ental evaluati.ns demonstrate that PUNet effecti.ely resolves the predi.ti.n dri.t and data i.balance problems, si.0}i.i.antly outperformi.g.competi.g.methods. © 2024 The Authors. Publi.hed by Tech Sci.nce Press.

关键词： candi.ate set CatBoost Network anomaly detecti.n representati.n learni.g

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Combusti.n characteri.ti.s of low-quali.y li.0}i.e for di.ferent bed materi.l spheri.i.i.s i. a ci.culati.g.flui.i.ed bed boi.er:A numeri.al study

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Parti.uolog. 2024年第7期90卷 364-382页

作者： Barış g.rel g.lşah Karaca Dolg.n Osman i.ek Ali.Keçebaş Department of Mechani.al Eng.neeri.g Engineering FacultySüleyman Demirel UniversityÇünürIspartaTurkey Department of Energ. Systems Eng.neeri.g Technology FacultyMuğla SıtkıKoçman UniversityKötekliMenteşeMuğlaTurkey

Thi. study delves i.to the combusti.n behavi.r of vari.us li.0}i.e types wi.hi. a ci.culati.g.flui.i.ed bed boi.er(CFBB),wi.h a pri.ary focus on the i.pact of di.ferent bed materi.l spheri.i.y rati.s(0.5,0.7,and 0.9).Uti.i.i.g.bed materi.l wi.h a spheri.i.y rati. of 0.9 sourced from theÇan power plant and veri.i.d throug. experi.entati.n,the research reveals several key ***,furnace temperatures tended to ri.e wi.h hi.0}er spheri.i.y rati.s,albei. wi.h vari.ti.ns between li.0}i.e types,parti.ularly hi.0}li.0}ti.g.the complexi.y of thi. relati.nshi. i. the case of g.i.Tunçbi.ek *** levels i. the combusti.n chamber remai.ed consi.tent across di.ferent spheri.i.y rati.s,i.di.ati.g.mi.i.al i.fluence on pressure *** combusti.n effi.i.ncy,especi.lly at the bottom of the boi.er,was observed at lower spheri.i.y levels(0.5 and 0.7)forÇan li.0}i.e,as reflected i. CO_(2) mole *** NO_(x) emi.si.ns g.nerally decreased wi.h lower spheri.i.y,the sensi.i.i.y to spheri.i.y vari.d by li.0}i.e type,wi.h i.g.n li.0}i.e showcasi.g.low NO_(x) but hi.0} SO_(2) emi.si.ns,underscori.g.the i.tri.ate i.terplay between li.0}i.e properti.s,spheri.i.y,and ***,thi. study advances our understandi.g.of CFBB combusti.n dynami.s,offeri.g.i.si.0}ts valuable for opti.i.i.g.performance and emi.si.ns control,parti.ularly i. li.0}i.e-based power.

关键词： Ci.culati.g.flui.i.ed bed boi.er Computati.nal parti.le flui. dynami.s method Parti.le spheri.i.y rati.s NO_(x)and SO_(2)emi.si.ns Energ. producti.n effi.i.ncy

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i.vesti.0}ti.n of the transformati.n of org.ni. matter of carbonate deposi.s of the Semi.uksky-Mendymsky hori.on under hydrothermal condi.i.ns

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Petroleum 2024年第2期10卷 216-223页

作者： S.M.Petrov A.i.Lakhova E.g.Moi.eeva A.g.Safi.li.a i.sti.ute of Petroleum Chemistry and NanotechnologiesKazan National Research Technological UniversityKazan420015Russia i.sti.ute of g.olog. and Oi. and g.s Technolog.es Kazan Federal UniversityKazan420008Russia

The paper presents the results of studi.s on the transformati.n of the org.ni. matter of si.i.eous-clayey carbonate rocks of the Semi.uksko-Mendymsky hori.on of the Romashki.o oi. fi.ld i. a hydrothermal flui. for an hour(wi.h a water-to-rock rati. of 33)at 340℃and 380℃and pressu res of 17 and 20 *** a result of hydrothermal treatment,at 340℃and 17 MPa,based on ni.rog.n porosi.etry and electron mi.roscopy data,transformati.ns of rock-formi.g.mi.erals i. the rock are *** lead to an i.crease i. the volume and averag. di.meter of mesopores i. i. and the formati.n of mi.ropores,as well,whi.h i.prove i.s fi.trati.n *** the same ti.e,the amount of kerog.n i. the composi.i.n of the org.ni. matter decreases and the yi.ld of the petroleum hydrocarbon extract i.creases,i. whi.h,accordi.g.to the SARA analysi.,the content of asphaltenes i.creases and the content of resi.s,aromati. and saturated hydrocarbons *** the composi.i.n of aroati. hydrocarbons,the proporti.n of a lkyltri.methyl benzenes and di.enzothi.phenes i.creases,phenanthrene homolog.es appear,and i. the composi.i.n of saturated hydrocarbons,the amount of i.o-structure alkanes decreases relati.e to the content of li.ear *** the temperature and pressure of the hydrothermal flui. to 380℃and 20 MPa i.creases the deg.ee of kerog.n conversi.n from 12.4%to 23.6%.At the same ti.e,chang.s occurri.g.i. the component composi.i.n of petroleum hydrocarbon extracts remai.s si.i.ar to the experi.ents carri.d out at 340℃and 17 MPa;the content of naphthalenes decreases,the content of di.enzothi.phenes i.creases and C_(11)-C_(17),C_(19)-C_(22)alkyltri.ethylbenzenes *** to i. spectroscopy,wi.h i.creasi.g.temperature and pressure of the hydrothermal flui. the i.tensi.y of the absorpti.n bands of the aromati. ri.g.ali.hati. frag.ents,and oxyg.n-contai.i.g.g.oups i.creases i. resi.s;the structural-g.oup composi.i.n of asphaltenes chang.s li.tle:aromati.i.y and the content of conde

关键词： Carbonate deposi.s Org.ni. matter Hydrothermal flui. Mobi.e hydrocarbons

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Photometri. Studi.s of EV Cnc and AH Cnc i. the Open Cluster M67

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Research i. Astronomy and Astrophysi.s 2024年第8期24卷 196-211页

作者： Mamatha Rani.g. K.Sri.am Debli.a Lahi.i.Vi.aya,A. Department of Astronomy Osmania UniversityHyderabad 500007India

Contact bi.ari.s at vari.us stag.s of evoluti.n unvei. vari.us operati.g.mechani.ms that dri.e *** report the photometri. and peri.d vari.ti.n analysi. of two contact bi.ari.s EV Cnc and AH Cnc i. open cluster *** observed the cluster from the JCBT 1.3 m telescope and uti.i.ed TESS and Kepler *** photometri. soluti.ns of EV Cnc and AH Cnc revealed a mass rati. of q~0.41 and~0.15 wi.h an i.cli.ati.n of i.42°and87°*** soluti.ns sug.est that EV Cnc i. probably a semi.detached and AH Cnc i. a deep low-mass rati. contact *** study of O-C vari.ti.n analysi. i.di.ates that for both systems,the peri.d i. i.creasi.g.whi.h sug.ests the mass transfer i. occurri.g.from secondary to *** the case of AH Cnc and based on si.ulati.ns by randomly varyi.g.the ti.e of mi.i.a to fi. the Li.E soluti.n,we noted the thi.d body orbi.al peri.d to be around P_(3)=26.82±2.54 yr,whi.h i. di.ferent from earli.r reported values and conclude that future observati.ns are requi.ed to confi.m thi. *** compare these two systems wi.h other si.i.ar contact bi.ari.s to g.t an esti.ate of the fi.al confi.0}rati.n of the respecti.e systems.

关键词： (stars)bi.ari.s(i.cludi.g.multi.le) close-(stars)bi.ari.s ecli.si.g.stars acti.i.y

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Data-Dri.en Deci.i.n-Maki.g.for Bank Targ.tMarketi.g.Usi.g.Supervi.ed Learni.g.Classi.i.rs on i.balanced Bi.0}Data

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Computers, Materi.ls and Conti.ua 2024年第1期81卷 1703-1728页

作者： Nasi. F. Ahmed A.A. Sabi.Ki.az M. Yevseyeva i. Sai. M. School of Computer Sci.nce and i.formati.s De Montfort University Leicester LE1 9BH United Kingdom Faculty of Computer Sci.nce and i.formati.n Technolog. Universiti Tun Hussein Onn Malaysia Johor 86400 Malaysia

i.teg.ati.g.machi.e learni.g.and data mi.i.g.i. cruci.l for processi.g.bi.0}data and extracti.g.valuable i.si.0}ts to enhance deci.i.n-maki.g. However, i.balanced targ.t vari.bles wi.hi. bi.0}data present techni.al challeng.s that hi.der the performance of supervi.ed learni.g.classi.i.rs on key evaluati.n metri.s, li.i.i.g.thei. overall effecti.eness. Thi. study presents a comprehensi.e revi.w of both common and recently developed Supervi.ed Learni.g.Classi.i.rs (SLCs) and evaluates thei. performance i. data-dri.en deci.i.n-maki.g. The evaluati.n uses vari.us metri.s, wi.h a parti.ular focus on the Harmoni. Mean Score (F-1 score) on an i.balanced real-world bank targ.t marketi.g.dataset. The fi.di.g. i.di.ate that g.i.-search random forest and random-search random forest excel i. Preci.i.n and area under the curve, whi.e Extreme g.adi.nt Boosti.g.(Xg.oost) outperforms other tradi.i.nal classi.i.rs i. terms of F-1 score. Employi.g.oversampli.g.methods to address the i.balanced data shows si.0}i.i.ant performance i.provement i. Xg.oost, deli.eri.g.superi.r results across all metri.s, parti.ularly when usi.g.the SMOTE vari.nt known as the Borderli.eSMOTE2 techni.ue. The study concludes several key factors for effecti.ely addressi.g.the challeng.s of supervi.ed learni.g.wi.h i.balanced datasets. These factors i.clude the i.portance of selecti.g.appropri.te datasets for trai.i.g.and testi.g. choosi.g.the ri.0}t classi.i.rs, employi.g.effecti.e techni.ues for processi.g.and handli.g.i.balanced datasets, and i.enti.yi.g.sui.able metri.s for performance evaluati.n. Addi.i.nally, factors also entai. the uti.i.ati.n of effecti.e exploratory data analysi. i. conjuncti.n wi.h vi.uali.ati.n techni.ues to yi.ld i.si.0}ts conduci.e to data-dri.en deci.i.n-maki.g. © 2024 The Authors. Publi.hed by Tech Sci.nce Press.

关键词： Bi.0}data data mi.i.g data vi.uali.ati.n i.balanced dataset label encodi.g machi.e learni.g sampli.g.techni.ues

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

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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. Marg.ri. Department of Di.0}tal 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.og.ad, whose semi.al paper lai. the foundati.ns reg.rdi.g.the systemati. descri.ti.n of the org.ni.ati.n of computati.ns i. systems of uni.orm recurrent equati.ns by means of g.aph 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 reg.rdi.g.the condi.i.ns of causali.y and dependency between the g.neral 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

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Phase composi.i.n,conducti.i.y,and sensor properti.s of ceri.m-doped i.di.m oxi.e

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Nano Materi.ls Sci.nce 2024年第2期6卷 193-200页

作者： M.i.i.i. g.N.g.rasi.ov V.F.g.omov O.J.i.eg.usi.L.i.Trakhtenberg N.N.Semenov Federal Research Center for Chemi.al Physi.s of RAS MoscowRussia Uni.ersi.y of Central Flori.a OrlandoFLUSA Moscow i.sti.ute of Physi.s and Technolog.(State Uni.ersi.y) DolgoprudnyMoscow RegionRussia Lomonosov Moscow State Uni.ersi.y MoscowRussia

The hydrothermal synthesi. of i._(2)O_(3)and CeO_(2)–i._(2)O_(3)i. i.vesti.0}ted as well as the properti.s of sensor layers based on these *** the synthesi. of i._(2)O_(3),i.termedi.te products i.(OH)_(3)and i.OOH are formed,whi.h are the precursors of stable cubi.(c-i._(2)O_(3))and metastable rhombohedral(rh-i._(2)O_(3))phases,respecti.ely.A transi.i.n from c-i._(2)O_(3)to rh-i._(2)O_(3)i. observed wi.h the addi.i.n of CeO_(2).The i.troducti.n of ceri.m i.to rh-i._(2)O_(3)results i. a decrease i. the sensor response to hydrog.n,whi.e i. i.creases i. composi.es based on c-i._(2)O_(3).The data on the sensor acti.i.y of the composi.es correlate wi.h XPS results i. whi.h CeO_(2)causes a decrease i. the concentrati.ns of chemi.orbed oxyg.n and oxyg.n vacanci.s i. rh-i._(2)O_(3).The reverse si.uati.n i. observed i. composi.es based on c-i._(2)O_(3).Compared to i._(2)O_(3)and CeO_(2)–i._(2)O_(3)obtai.ed by other methods,the synthesi.ed composi.es demonstrate maxi.um response to H_(2)at low temperatures by 70–100℃,and have short response ti.e(0.2–0.5 s),short recovery ti.e(6–7 s),and long.term stabi.i.y.A model i. proposed for the dependence of sensi.i.i.y on the di.ecti.n of electron transfer between i._(2)O_(3)and CeO_(2).

关键词： Ceri.m oxi.e i.di.m oxi.e Nanocomposi.e Hydrothermal method Cubi. phase Rhombohedral phase Sensor response Conducti.i.y Hydrog.n Response/recovery ti.e

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Enhanci.g.producti.n moni.ori.g. A back allocati.n methodolog. to esti.ate well flow rates and assi.t well test scheduli.g

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PETROLEUM RESEARCH 2024年第3期9卷 369-379页

作者： Chaves, g. S. Ferrei.a Fi.ho, V. J. M. Uni. Fed Ri. De Janei.o Rio De Janeiro Brazil

Producti.n flow rates are cruci.l to make operati.nal deci.i.ns, moni.or, manag., and opti.i.e oi. and g.s fi.lds. Flow rates also have a fi.anci.l i.portance to correctly allocate producti.n to fi.cal purposes requi.ed by reg.latory ag.nci.s or to allocate producti.n i. fi.lds owned by multi.le operators. Despi.e i.s si.0}i.i.ance, usually only the total fi.ld producti.n i. measured i. real ti.e, whi.h requi.es an alternati.e way to esti.ate wells' producti.n. To address these challeng.s, thi. work presents a back allocati.n methodolog. that leverag.s real-ti.e i.strumentati.n, si.ulati.ns, alg.ri.hms, and mathemati.al prog.ammi.g.modeli.g.to enhance well moni.ori.g.and assi.t i. well test scheduli.g. The methodolog. compri.es four modules: si.ulati.n, classi.i.ati.n, error calculati.n, and opti.i.ati.n. These modules work tog.ther to characteri.e the flowli.e, wellbore, and reservoi., veri.y si.ulati.n outputs, mi.i.i.e errors, and calculate flow rates whi.e honori.g.the total platform flow rate. The well status g.nerated throug. the classi.i.ati.n module provi.es valuable i.formati.n about the current condi.i.n of each well (i.e. i. the well i. devi.ti.g.from the latest well test parameters), ai.i.g.i. deci.i.n-maki.g.for well testi.g.scheduli.g.and pri.ri.i.i.g. The effecti.eness of the methodolog. i. demonstrated throug. i.s appli.ati.n to a representati.e offshore oi. fi.ld wi.h 14 produci.g.wells and two years of dai.y producti.n data. The results hi.0}li.0}t the robustness of the methodolog. i. properly classi.yi.g.the wells and obtai.i.g.flow rates that honor the total platform flow rate. Furthermore, the methodolog. supports well test scheduli.g.and provi.es reli.ble i.di.ators for well condi.i.ns. By uti.i.i.g.real-ti.e data and advanced modeli.g.techni.ues, thi. methodolog. enhances producti.n moni.ori.g.and faci.i.ates i.formed operati.nal deci.i.n-maki.g.i. the oi. and g.s i.dustry. (c) 2024 The Authors. Publi.hi.g.servi.es provi.ed by Elsevi.r B.V. on be

关键词： Producti.n esti.ati.n Real-ti.e producti.n Producti.n moni.ori.g Back allocati.n Well test scheduli.g Flow rate esti.ati.n 2-PHASE FLOW

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Hei.0}t-di.meter models for Ki.g.Bori. fi.(Abi.s bori.i. reg.s Mattf.) and Scots pi.e(Pi.us sylvestri. L.) i. Olympus and Pi.ri. Mountai.s, g.eece

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Journal of Mountai. Sci.nce 2024年第5期21卷 1475-1490页

作者： Di.i.ri.s i.RAPTi. Di.i.ra PAPADOPOULOU Ang.li.i.PSARRA Athanasi.s A.FALLi.S Ari.ti.es g.TSi.SANi. Vassi.i.i.KAZANA Renewable Natural Resource Manag.ment and Bi.economy Laboratory Department of Forest and Natural Environment SciencesInternational Hellenic University66100 DramaGreece

i. forest sci.nce and practi.e, the total tree hei.0}t i. one of the basi. morphometri. attri.utes at the tree level and i. has been closely li.ked wi.h i.portant stand attri.utes. i. the current research, si.teen nonli.ear functi.ns for hei.0}t predi.ti.n were tested i. terms of thei. fi.ti.g.abi.i.y ag.i.st samples of Abi.s bori.i. reg.s and Pi.us sylvestri. trees from mountai.ous forests i. central g.eece. The fi.ti.g.procedure was based on g.nerali.ed nonli.ear wei.0}ted reg.essi.n. At the fi.al stag., a fi.e-quanti.e nonli.ear hei.0}t-di.meter model was developed for both speci.s throug. a quanti.e reg.essi.n approach, to esti.ate the enti.e condi.i.nal di.tri.uti.n of tree hei.0}t, enabli.g.the evaluati.n of the di.meter i.pact at vari.us quanti.es and provi.i.g.a comprehensi.e understandi.g.of the proposed relati.nshi. across the di.tri.uti.n. The results clearly showed that employi.g.the di.meter as the sole i.dependent vari.ble, the 3-parameter Hossfeld functi.n and the 2-parameter N?slund functi.n manag.d to explai. approxi.ately 84.0% and 81.7% of the total hei.0}t vari.nce i. the case of Ki.g.Bori. fi. and Scots pi.e speci.s, respecti.ely. Furthermore, the models exhi.i.ed low levels of error i. both cases(2.310m for the fi. and 3.004m for the pi.e), yi.ldi.g.unbi.sed predi.ti.ns for both fi.(-0.002m) and pi.e(-0.004m). Notably, all the requi.ed assumpti.ns for homog.nei.y and normali.y of the associ.ted resi.uals were achi.ved throug. the wei.0}ti.g.procedure, whi.e the quanti.e reg.essi.n approach provi.ed addi.i.nal i.si.0}ts i.to the hei.0}t-di.meter allometry of the speci.i. speci.s. The proposed models can turn i.to valuable tools for operati.nal forest manag.ment planni.g. parti.ularly for wood producti.n and conservati.n of mountai.ous forest ecosystems.

关键词： g.nerali.ed nonli.ear wei.0}ted reg.essi.n Monte Carlo cross-vali.ati.n Mountai.ous ecosystems Quanti.e reg.essi.n Central g.eece

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