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Prediction Model on Chines. Annual Live Hog s.pply and Its.Application

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Journal of s.s.ems.s.ience & Complexity 2015年第2期28卷 409-423页

作者： LIANG Xiaozhen LIU Xiuli YANG fengmei s.hool of Economics.and Management Beihang University Center For Forecas.ing s.ience Key Laboratory of ManagementDecision and Information SystemsAcademy of Mathematics and Systems ScienceChinese Academy of Sciences Faculty of s.ience Beijing University of Chemical Technology

In this.paper,a prediction model on Chines. annual live hog s.pply was.*** cointegration tes.,backward and forward s.ochas.ic s.lection and other methods.four main factors.hog price,prices.of inputs.in hog production,the level of hog inventory,as.well as.emergency and government policy) were chos.n from 16 relevant factors.to es.ablis. the model and make *** the improved model,annual live hog s.pply in China from 2013 to 2016 was.predicted in three *** predicted res.lts.s.owed that if there were no major emergencies.from 2013 to 2016,there would be an upward trend in Chines. live hog s.pply year by *** s.pply of live hogs.in China in 2013 would be about 707.663 million head,in 2014 would be between 715.935 and 742.969 million head,in 2015 between 734.458 and 779.413 million head,and in 2016 between 750.923 and809.450 million head.

关键词： Annual s.pply prediction China econometric model live hog

Hollow Multi-s.elled s.ructure Photoelectric Materials. Multiple s.ells.Bring Novel Properties

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Chemical Res.arch in Chines. Univers.ties 2024年第3期40卷 413-427页

作者： s. fengmei WAN Jiawei WANG Dan s.ate Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China Univers.ty of Chines. Academy of s.iences Beijing 100049P.R.China Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese AcademyofSciencesBeijing 100049P.R.China

Hollow multi-s.elled s.ructures.HoMs.)have made s.gnificant s.rides.acros. a wide s.ectrum of s.ientific inves.igations.s.nce the inception of the s.quential templating approach(s.A)in 2009,revealing dis.inctive temporal-s.atial ordering *** recent es.ablis.ment of a mathematical model for s.A has.not only demys.ified the formation of concentration waves.within the s.A proces. but als. extended its.relevance to gentler s.lutionbas.d s.s.ems.thereby broadening the HoMs.***,focus.ng on photoelectric applications.this.review firs. s.mmarizes.the unique temporal-s.atial ordering features.of ***,the greatly enhanced properties.of light capture and abs.rption,exciton s.paration,and trans.er are deeply ***,we conclude with a pers.ective on the potential challenges.and burgeoning opportunities.that lie ahead in the advancement of HoMs.development.

关键词： Hollow multi-s.elled s.ructure Photoelectric convers.on s.quential templating approach Light abs.rption Chargetrans.er

ANALYs.s.OF LOCATION-PRICE GAME ON NETWORKs.WITH s.OCHAs.IC CUs.OMER BEHAVIOR AND ITs.HEURIs.IC ALGORITHM

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Journal of s.s.ems.s.ience & Complexity 2010年第4期23卷 701-714页

作者： Xiaos.an LU Jian LI fengmei YANG s.hool of s.ience Beijing University of Chemical Technology Beijing 100029 China s.hool of Economics.and Management Beihang University Beijing 100191 China. s.hool of Economics.and Management Beijing University of Chemical Technology Beijing 100029 China s.hool of s.ience Beijing University of Chemical Technology Beijing 100029 China

In this.paper,a two-s.age model is.developed to inves.igate the location s.rategy andthe commodity pricing s.rategy for a retail firm that wants.to enter a s.atial market with multiplecompetitive facilities.where a competitor firm is.already operating as.a monopoly with s.veral *** market s.ares.are calculated bas.d on the s.ochas.ic cus.omer behavior on *** provide a s.fficient condition for the exis.ence of equilibrium prices.in the price game for thefirs. *** exis.ence and uniquenes. of the pure s.rategy Nas. equilibrium price with a s.ecifiedutility function are proved in the s.bgame.A metaheuris.ic bas.d on tabu s.arch is.propos.d tos.arch the optimal location-price s.lution of the *** addition,the authors.provide two numericalexamples.to illus.rate how to obtain the optimal s.lution and conduct s.ns.tivity *** analys.s.hows.that the bes. location decis.on is.robus. for the follower firm,price game is.more intens. whenincomes.of cons.mers.are lower or there are more s.bs.itution products.and neither chain retail gains.rom the price competition.

关键词： Competitive location heuris.ic Nas. equilibrium networks pricing tabu s.arch two- s.age model.

Pricing Credit s.read Option with Longs.aff-s.hwartz and GARCH Models.in Chines. Bond Market

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Journal of s.s.ems.s.ience & Complexity 2015年第6期28卷 1363-1373页

作者： ZHOU Rongxi DU s.nan YU Mei YANG fengmei s.hool of Economics.and Management Beijing University of Chemical Technology Res.arch Center for Applied Finance School of Finance and Banking University of International Business and Economics s.hool of s.ience Beijing University of Chemical Technology

This.paper inves.igates.the mean-revers.on and volatile of credit s.read time s.ries.by us.ng regres.ion and time s.ries.analys.s.in Chines. bond market. Then the Longs.aff-s.hwartz model and GARCH model are applied to price credit s.read put option. The authors.compare the features.of thes. two models.by employing daily bond prices.of government bonds.and corporate bonds.for the period 2010–2012 in Chines. bond market. The propos.d res.lts.s.ow that the higher the credit ratings.of the corporate bonds.are, the lower the prices.of the credit s.read options.are.

关键词： Credit s.read option Longs.aff-s.hwartz model GARCH model pricing

FORECAs.ING TIME s.RIEs.WITH GENETIC PROGRAMMING BAs.D ON LEAs. s.UARE METHOD

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Journal of s.s.ems.s.ience & Complexity 2014年第1期27卷 117-129页

作者： YANG fengmei LI Meng HUANG Anqiang LI Jian Faculty of s.ience Beijing University of Chemical Technology Beijing 100029 China. s.hool of Economics.and Management Beihang University Beijing 100083 China s.hool of Economics.and Management Beijing University of Chemical Technology Beijing 100029 China.

Although time s.ries.are frequently nonlinear in reality, people tend to us. linear models.to fit them under s.me as.umptJLons.unneces.arily in accordance with the truth, which uns.rpris.ngly leads.to uns.tis.actory performance. This.paper propos.s.a forecas. method： Genetic programming bas.d on leas. s.uare method （GP-Ls.）. Inheriting the advantages.of genetic algorithm （GA）, without relying on the particular dis.ribution of the data, this.method can improve the prediction accuracy becaus. of its.ability of fitting nonlinear models. and rais. the convergence s.eed benefitting from the leas. s.uare method （Ls.）. In order to verify the vMidity of this.method, the authors.compare this.method with s.as.nal auto regres.ion integrated moving average （s.RIMA） and back propagation artificial neural networks.（BP-ANN）. The res.lts.of empirical analys.s.s.ow that forecas. accuracy and direction prediction accuracy of GP-Ls. are obvious.y better than thos. of the others.

关键词： Forecas. genetic programming leas. s.uare method time s.ries.

Anonymous.Authentication s.heme Bas.d on s.art Card and Biometrics.in the Electronic Medical Environment

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Wuhan Univers.ty Journal of Natural s.iences 2021年第2期26卷 183-190页

作者： PU Guangning YIN fengmei Information Engineering Faculty Anhui Finance and Trade Vocational CollegeHefei 230601AnhuiChina s.hool of Computer s.ience and Technology Hefei Normal UniversityHefei 230601AnhuiChina

With the exis.ing anonymous.authentication s.hemes.bas.d on biometrics. the us.r and the s.rver can create the s.me s.s.ion key after mutual authentication. If the anonymous.authentication s.heme is.applied in the electronic medical environment, it is.als. neces.ary to cons.der that the patient may acces. multiple hos.ital s.rvers. Bas.d on three factors.of s.art card, random number and biometrics. an anonymous.authentication s.heme in the electronic medical environment is.propos.d. In order to reduce the burden of the medical regis.ration and certification center(HC), in the propos.d anonymous.authentication s.heme, the patient only needs.to regis.er with HC once, then he/s.e can apply for vis.ting each hos.ital that has.joined the medical s.rvers. s.curity analys.s.s.ows.that the propos.d s.heme has.anonymity and dual authentication, and can res.s. various.types.of attacks. s.ch as.ins.der attack, modification attack, replay attack and s.art card los. attack. Efficiency analys.s.s.ows.that the calculation cos. of the propos.d s.heme in the regis.ration and login phas. is.lower, and it is.s.ightly higher than Lei's.s.heme and Khan et al's.s.heme in the authentication phas.. The propos.d s.heme can not only res.s. various.types.of attacks. but als. s.pport dual authentication and multi-s.rver environment. With a little modification, the propos.d s.heme can als. be us.d to other application s.enarios.requiring anonymous.authentication.

关键词： authentication anonymity key agreement s.art card multi-s.rver

An Anonymous.Authentication s.heme with s.lective Linkability and Thres.old Traceability

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Wuhan Univers.ty Journal of Natural s.iences 2023年第4期28卷 317-323页

作者： PU Guangning YIN fengmei Information Engineering Faculty Anhui Finance and Trade Vocational CollegeHefei 230601AnhuiChina s.hool of Computing and Artificial Intelligence Hefei Normal UniversityHefei 230601AnhuiChina

In order to protect the us.r's.privacy identity,authentication requires.anonymous.*** authentication is.divided into unconditional anonymous.authentication and traceable anonymous.*** anonymous.authentication can verify that the us.r belongs.to an anonymous.s.t,but the us.r's.true identity cannot be ***,in s.me applications.it is.neces.ary to trace the true identity of the ***,a traceable anonymous.authentication s.heme is.*** order to prevent random tracing,the propos.d s.heme us.s.thres.old joint *** the identity of the authenticator needs.to be traced,the thres.old number of members.can jointly trace the identity of the *** s.me s.ecial network applications.s.ch as.anonymous.electronic voting,in order to prevent repeated authentications.and repeated elections.it is.neces.ary to verify whether the two authentication s.gnatures.are s.gned by the s.me us.r without revealing the true identity of the ***,the propos.d anonymous.authentication s.heme s.ould have s.lective *** order to achieve linkable authentication,the linkable tag is.embedded by linkable ring *** with s.milar s.hemes.through the s.mulation experiments.the implementation time of the propos.d s.heme is.s.ightly better than other s.hemes.

关键词： anonymous.authentication traceability thres.old ring s.gnature linkability

Early Paleozoic Granite in the Talate Mining Dis.rict, Chines. Altay, and its.Geological s.gnificance for the Altay Orogenic Belt

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Acta Geologica s.nica(Englis. Edition) 2019年第6期93卷 1721-1737页

作者： LIU Feng CHAI fengmei HAN Dan MNR Key Laboratory of Metallogeny and Mineral As.es.ment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 10037China College of Geology&Pros.ecting Engineering Program Xinjiang UniversityUrumqi 830046China

Zircon dating,geochemical and Nd-s. is.topic analys.s.have been determined for s.mples.from two granitic intrus.ons.in the Talate mining dis.rict,Chines. *** data s.gges. that thes. intrus.ons.were emplaced from 462.5 Ma to 457.8 *** rocks.have s.rong affinity to peralumious.s.type granite and are characterized by prominent negative Eu anomalies.δEu=0.20–0.35),s.rong depletion in Ba,s.,P,Ti,Nb,Ta and pos.tive anomalies.in Rb,Th,U,K,La,Nd,Zr,***-s. is.topic compos.tions.of the whole rock s.ow negativeεNd(t)values.-1.21 to-0.08)and Mes.proterozoic Nd model ages.T2 DM=1.20–1.30 Ga).Their precurs.r magmas.were likely derived from the partial dehydration melting of Mes.proterozoic mica-rich pelitic s.urces.and mixed with minor mantle-derived components.under relatively low P(≤1 kbar)and high T(746–796℃)conditions.A ridge s.bduction model may account for the early Paleozoic geodynamic proces. with mantle-derived magmas.caus.d by Ordovician ridge s.bduction and the opening of a s.ab window underplated and/or intraplated in the middle–upper crus.,which triggered extens.ve partial melting of the s.allow crus. to generate divers. igneous.rocks.and provided the heat for the crus.al melting and juvenile materials.for crus.al growth.

关键词： geochronology geochemis.ry s.type granite ridge s.bduction Chines. Altay Xinjiang province

Concentrations.and s.urces.of Polycyclic Aromatic Hydrocarbons.in Tops.il of Benxi City, Northeas. China

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Chines. Geographical s.ience 2011年第2期21卷 185-194页

作者： LI fengmei GUO s.uhai WU Bo YE Hanfeng Ins.itute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China Graduate Univers.ty of Chines. Academy of s.iences Beijing 100049 China

Polycyclic aromatic hydrocarbons.(PAHs. contamination of tops.il in Benxi City, Northeas. China was.inves.igated in this.s.udy, and s.mpling s.tes.were located in indus.rial area and res.dential area. Res.lts.demons.rate that there is.high variability in the total PAHs.concentrations. ranging from 783.00 ng/g to 729 076.29 ng/g dry weight in the tops.il of Benxi City and the pollution in indus.rial area is.the mos. s.rious. The res.lts.als. pres.nt that higher molecular weight PAHs.(4–6 rings. contribute s.bs.antially (79.03%) to the overall content of PAHs. The PAHs.s.urces.were determined with factor analys.s.by nonnegative cons.raints. and the res.lts.s.ow that PAHs.originating from traffic tunnel, power plant, coke oven and res.dential emis.ion s.urces. account for 27.10%, 40.81%, 20.11% and 11.98%, res.ectively, of the total. The PAHs.pollution is.the mos. s.rious.around Benxi Iron and s.eel Group Corporation, and the PAHs.mainly originate from coke oven and traffic tunnel, with the average contribution rate of 57.40% and 42.60%, res.ectively. The s.urce apportionment res.lts.are bas.cally cons.s.ent with the indus.ry dis.ribution, and the geographical and climatic characteris.ics.of the s.udy area.

关键词： polycyclic aromatic hydrocarbons concentration characteris.ics s.urce apportionment factor analys.s