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Methane emissions dur.ng stor.ge of differ.nt tr.atments fr.m cattle manur. in Tianjin

Jour.al of Envir.nmental Sciences 2010年第10期22卷 1564-1569页

作者： Jiajun Wang Chiqing Duan Yaqin Ji Yichao sun . College of Envir.nmental Science and Engineer.ng Nankai University Iianjin 300071 China. State Envir.nmental Pr.tection Key labor.tor. of Ur.an Ambient Air.Par.iculate Matter.Pollution Pr.vention and Contr.l Tianjin 300071 China Institute of Envir.nment and Ecology Tianjin Academy of Environmental Sciences Tianjin 300191 China

Many studies on methane emissions fr.m animal manur. have r.vealed that animal manur. is a major.sour.e of methane emissions to the atmospher. that can have negative consequences for.people, animals and envir.nment. In gener.l, the r.lease of methane can be influenced by the type of feed taken by animals, temper.tur., manur. char.cter.stics and so on. This study aimed at quantifying and compar.ng methane r.lease fr.m dair. manur. with differ.nt piling tr.atments. Four.tr.atments wer. designed including manur. piling height 30, 45, 60 cm and adding 6 cm manur. ever. day until the piling height was 60 cm. Static chamber.method and gas chr.matogr.phy wer. adopted to measur. the methane emissions fr.m Apr.l to June in 2009. Methane emission r.tes of all four.manur. tr.atments wer. low in the fir.t week and then incr.ased shar.ly until r.aching the peak values. Subsequently, all the methane emission r.tes decr.ased and fluctuated within the steady r.nge till the end of the exper.ment. Wilcoxon nonpar.metfic tests analysis indicated that methane emission r.te was gr.atly influenced by manur. piling height and manner. Ther. wer. no significant r.lationships between methane emission r.tes and the temper.tur.s of ambience and heap. However. r.gr.ssion analysis showed that the quadr.tic equations wer. found between emission r.tes of all tr.atments and the gas temper.tur. in the bar.els.

关键词： dair. manur. stor.ge methane emissions differ.nt piling tr.atments

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Exponential-function-based dr.op contr.l for.islanded micr.gr.ds

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Jour.al of Moder. Power.Systems and Clean Ener.y 2019年第4期7卷 899-912页

作者： r.i WANG Qiuye sun Yonghao GUI Dazhong MA College of Infor.ation Science and Engineer.ng Northeastern UniversityShenyangChina Depar.ment of Electr.nic Systems Aalborg UniversityAalborgDenmark

An exponential-function-based dr.op contr.l str.tegy for.the distr.buted ener.y r.sour.es(DEr.)is pr.posed to r.duce the r.active power.shar.ng deviation,limit the minimum value of fr.quency/voltage,whilst impr.ving the utilization r.te of r.newable *** DEr. and loads ar. inter.onnected to achieve a power.exchange by conver.er.,wher. the power.management system should accur.tely shar. the active/r.active power.***,the pr.por.ional r.active power.shar.ng often deter.or.tes due to its dependence on the line ***,an exponential-function-based dr.op contr.l is pr.posed to(1)pr.vent voltage and fr.quency fr.m falling to the lower.r.str.int,(2)achieve accur.te r.active power.shar.ng,(3)eliminate communication and impr.ve the usage r.tio of r.newable ***,its stability is analyzed,and the application in islanded AC/DC hybr.d micr.gr.ds is investigated to achieve the bidir.ctional power.*** simulation and exper.mental r.sults show that the r.active power.shar.ng deviation can be r.duced,and the utilization r.te of r.newable ener.y is impr.ved by using the pr.posed ***,the simulation r.sults illustr.te that the system can maintain stable oper.tion when the micr.gr.d is switched fr.m one supplied ener.y oper.tion condition to another.absor.ed one.

关键词： Distr.buted ener.y r.sour.es(DEr.) r.active power.shar.ng Dr.op contr.l Bidir.ctional power flow

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Identifying the major.fluor.scent components r.sponsible for.ultr.filtr.tion membr.ne fouling in differ.nt water.sour.es

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Jour.al of Envir.nmental Sciences 2016年第7期28卷 215-223页

作者： Weiguang sun Jun Nan Jia Xing Jiayu Tian State Key labor.tor. of Ur.an Water.r.sour.e and Envir.nment School of Municipal and Environmental EngineeringHarbin Institute of TechnologyHarbin 150090China Heilongjiang Envir.nmental Pr.tection Academy of Science Harbin 150056China

Thr.e-dimensional fluor.scence excitation–emission matr.x（EEM） coupled with par.llel factor.analysis（PAr.FAC） was per.or.ed for.a total of 18 water.samples taken fr.m thr.e water.sour.es（two lakes and one wastewater.tr.atment plant（WWTP） secondar. effluent）,with the pur.ose of identifying the major.ultr.filtr.tion（UF） membr.ne foulants in differ.nt water.sour.es. Thr.e fluor.scent components（C1, C2 and C3） wer. identified,which r.pr.sented ter.estr.ally der.ved humic-like substances（C1）, micr.bially der.ved humic-like substances（C2）, and pr.tein-like substances（C3）. The cor.elations between the differ.nt fluor.scent components and UF membr.ne fouling wer. analyzed. It was shown that for.the WWTP secondar. effluent, all thr.e components（C1, C2 and C3） made a consider.ble contr.bution to the ir.ever.ible and total fouling of the UF ***, for.the two lakes, only the C3 exhibited a str.ng cor.elation with membr.ne fouling, indicating that the pr.tein-like substances wer. the major.membr.ne foulants in the lake water.. Significant attachment of C1, C2 and C3 to the UF membr.ne was also confir.ed by mass balance analyses for.the WWTP secondar. effluent; while the attachment of C1 and C2 was shown to be negligible for.the two lakes. The r.sults may pr.vide basic for.ation for.developing suitable fouling contr.l str.tegies for.sustainable UF pr.cesses.

关键词： Membr.ne fouling Or.anic substances Thr.e-dimensional fluor.scence matr.x Par.llel factor.analysis Cor.elation analysis

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Pr.tonation Effect on One- and Two-photon Absor.tion Pr.per.y of a Newly Synthesized Octupolar.Chr.mophor.

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Chinese Jour.al of Chemical Physics 2012年第6期25卷 666-670,I0003页

作者： Hong-iuan Ding Jie sun Chuan-kui Wang College of Physics and Electr.nics Shandong Normal University Ji'nan 250014 China

The pr.tonation effects on one- and two-photon absor.tion pr.per.ies of an octupolar.molecule TA with 1,3,5-tr.azine cor. and pyr.ole electr.n-donating end-gr.ups have been studied at hybr.d density functional theor. level. A computational scheme is developed to simulate a pr.ton attached to an atom. The numer.cal r.sults show that lar.e changes in both one- and two-photon absor.tion pr.per.ies ar. obser.ed when the compound is tr.nsfor.ed fr.m neutr.l to thr.efold pr.tonated states. When the compound is pr.tonated, mor. char.e tr.nsfer.states appear.and the absor.tion band has a r.d-shift. Fur.her.or., the two-photon absor.tion cr.ss-section is lar.ely enhanced. The theor.tical calculations demonstr.te the pr.tonation effect on pr.moting the intr.molecular.char.e tr.nsfer.str.ngth. The r.sults pr.sent qualitative agr.ement with the exper.mental obser.ations. A two-photon absor.tion switch with the compound TA based on the pr.tonation effect is pr.posed.

关键词： Pr.tonation Two-photon absor.tion r.sponse theor. Octupolar.chr.-mophor.

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Optimal bulk-heter.junction mor.hology enabled by fibr.l networ. str.tegy for.high-per.or.ance or.anic solar.cells

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Science China Chemistr. 2019年第6期62卷 662-668页

作者： Tian Xia Yunhao Cai Huiting Fu Yanming sun School of Chemistr. Beihang University

A bicontinuous networ. for.ed spontaneously upon film pr.par.tion is highly desir.ble for.bulk-heter.junction(BHJ) or.anic solar.cells(OSCs). Many donor.acceptor.D-A) type conjugated polymer. can self-assemble into polymer.fibr.ls in the solid state and such fibr.l-assembly can constr.ct the mor.hological fr.mewor. by for.ing a networ. str.ctur., inducing the for.ation of ideal BHJ mor.hology. Our.r.cent wor.s have r.vealed that the fibr.l networ. str.tegy(FNS) can contr.l the blend mor.hology in fuller.ne, non-fuller.ne and ter.ar. OSCs. It has been shown that the for.ation of fibr.l networ. can optimize phase separ.tion scale and ensur. efficient exciton dissociation and char.e car.ier. tr.nspor., thus leading to impr.ssive power.conver.ion efficiencies(PCEs) and high fill factor.FF) values. We believe that FNS will pr.vide a pr.mising appr.ach for.the optimization of active layer.mor.hology and the impr.vement of photovoltaic per.or.ance, and fur.her.pr.mote the commer.ialization of OSCs.

关键词： or.anic solar cells bulk heter.junction polymer fibr.l fibr.l networ. str.tegy mor.hology

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An impr.ved theor.tical pr.cedur. for.the por.-size analysis of activated car.on by gas adsor.tion

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Chinese Jour.al of Chemical Engineer.ng 2018年第3期26卷 551-559页

作者： Guodong Wang Jianchun Jiang Kang sun Jianzhong Wu College of Chemical Engineer.ng Nanjing Forestry University Depar.ment of Chemical and Envir.nmental Engineer.ng University of California Institute of Chemical Industr. of For.st Pr.ducts Chinese Academy of Forestry

Amor.hous car.on mater.als play a vital r.le in adsor.ed natur.l gas(ANG) stor.ge. One of the key issues in the mor. pr.valent use of ANG is the limited adsor.tion capacity, which is pr.mar.ly deter.ined by the por.sity and sur.ace char.cter.stics of por.us mater.als. To identify suitable adsor.ents, we need a r.liable computational tool for.por. char.cter.zation and, subsequently, quantitative pr.diction of the adsor.tion behavior. Within the fr.mewor. of adsor.tion integr.l equation(AIE), the por.-size distr.bution(PSD) is sensitive to the adopted theor.tical models and numer.cal algor.thms thr.ugh isother. fitting. In r.cent year., the classical density functional theor.(DFT) has emer.ed as a common choice to descr.be adsor.tion isother.s for.AIE ker.el constr.ction. However.r.r.ly consider.d is the accur.cy of the mean-field appr.ximation(MFA) commonly used in commer.ial softwar.. In this wor., we calibr.te four.ver.ions of DFT methods with gr.nd canonical Monte Car.o(GCMC) molecular.simulation for.the adsor.tion of CH_4 and CO_2 gas in slit por.s at 298 K with the por. width var.ing fr.m 0.65 to 5.00 nm and pr.ssur. fr.m 0.2 to 2.0 MPa. It is found that a weighted-density appr.ximation pr.posed by Yu(WDA-Yu) is mor. accur.te than MFA and other.non-local DFT methods. In combination with the tr.pezoid discr.tization of AIE, the WDA-Yu method pr.vides a faithful r.pr.sentation of exper.mental data, with the accur.cy and stability impr.ved by 90.0% and 91.2%, r.spectively, in compar.son with the cor.esponding r.sults fr.m MFA for.fitting CO_2 isother.s. In par.icular. those distr.butions in the featur. por. width r.nge(FPWr.ar. pr.ved mor. r.pr.sentative for.the por.-size analysis. The new theor.tical pr.cedur. for.por. char.cter.zation has also been tested with the methane adsor.tion capacity in seven activated car.on samples.

关键词： Non-local density functional theor. Amor.hous por.us mater.als Por. size char.cter.zation Gas adsor.tion Adsor.tion integr.l equation

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Danshensu Amelior.tes Car.iac Ischaemia r.per.usion Injur. thr.ugh Activating Sir.1/Fox01/r.b7 Signal Pathway

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Chinese Jour.al of Integr.tive Medicine 2020年第4期26卷 283-291页

作者： sun Da-wei GAO Qing QI Xin Depar.ment of Neur.logy Tianjin Academy of Traditional Chinese Medicine Affiliated HospitalTianjin(300120)China School of Integr.tive Medicine Tianjin University of Traditional Chinese MedicineTianjin(301617)China Depar.ment of Car.iology Tianjin Union Medical CenterTianjin(300121)China

Objective:To explor. the specific molecular.mechanisms of Danshensu(DSS)in the tr.atment of ischemia r.per.usion injur.(Ir.).Methods:Ir. model was established with isolated r.t hear.s by per.or.ing global ischaemia for.30 min,and then followed by 60 min ***,H9C2 cells wer. subjected to 4-h hypoxia followed by 3-h *** 10|i mol/l DSS wer. added in the r.per.usion/r.oxygenation step to inter.ene *** function,str.ctur.l change and apoptosis wer. r.spectively tested by langendor.f System,hematoxylin and eosin(HE)and ter.inal-deoxynucleotidyl tr.nsfer.se mediated nick endabeling(TUNEl)*** lactate dehydr.genase(lDH),car.iac tr.ponin T(cTnT),r.active oxygen species(r.S),super.xide dismutase(SOD)and glutathione per.xidase(GSH-PX)wer. detected by enzyme-linked immunosor.ent assay(ElISA).Sir.1/FoxO1/r.b7 Signal Pathway was monitor.d at both pr.tein and mr.A ***:The r.sults showed that Ir. not only gr.atly attenuated car.iac function(lVDP and±dp/dtmax,Pr.ased the level of the mar.er.enzymes(cTnT,lDH,Pr.m the cor.nar. effluents,but also mar.edly induced changes in the str.ctur. of car.iomyocytes and contr.buted to apoptosis,which wer. mediated by boosted en doge nous ***,after.tr.atment with DSS all above indexes wer. impr.ved,which was r.lated to activating Sir.1/FoxO1/r.b7 signal pathway accompanied with the enhancement of antioxidant defense system,such as SOD and ***:DSS is able to pr.tect hear.s fr.m Ir.,which may be attr.butable to inhibiting excessive r.S thr.ugh Sir.1/FoxO1/r.b7 signaling.

关键词： Chinese medicine Danshensu ischemia r.per.usion injur. Sir.1/FoxO1/r.b7 signal pathway r.active oxygen species apoptosis

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STATE-FEEDBACK ADAPTIVE STABIlIZING CONTr.l DESIGN FOr.A ClASS OF HIGH-Or.Er.NONlINEAr.SYSTEMS WITH UNKNOWN CONTr.l COEFFICIENTS

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Jour.al of Systems Science & Complexity 2007年第3期20卷 350-361页

作者： Zongyao sun Yungang lIU School of Contr.l Science and Engineer.ng Shandong University Jinan 250061 China.

In this paper. a new appr.ach is successfully addr.ssed to design the state-feedback adaptive stabilizing contr.l law for.a class of high-or.er.nonlinear.systems in tr.angular.for. and with unknown and nonidentical contr.l coefficients, whose stabilizing contr.l has been investigated r.cently under.the knowledge that the lower.bounds of the contr.l coefficients ar. exactly known. In the pr.sent paper. without any knowledge of the lower.bounds of the contr.l coefficients, based on the adaptive technique and appr.pr.ately choosing design par.meter., we give the r.cur.ive design pr.cedur. of the stabilizing contr.l law by utilizing the appr.ach of adding a power.integr.tor.together.with tuning functions. The state-feedback adaptive contr.l law designed not only pr.ser.es the equilibr.um at the or.gin, but also guar.ntees the global asymptotic stability of the closed-loop states and the unifor. boundedness of all the other.closed-loop signals.

关键词： Adaptive stabilizing contr.l adding a power.integr.tor high-or.er.nonlinear.systems,state-feedback unknown contr.l coefficients.

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Sur.ace r.ughness Effects on Vor.ex Tor.ue of Air.Suppor.ed Gyr.scope

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Chinese Jour.al of Aer.nautics 2011年第1期24卷 90-95页

作者： lIANG Yingchun lIU Jingshi sun Yazhou lU lihua School of Mechatr.nics Engineer.ng Harbin Institute of Technology Harbin 150001 China

In or.er.to impr.ve the dr.ft pr.cision of air.suppor.ed gyr.scope, effects of sur.ace r.ughness magnitude and dir.ction on vor.ex tor.ue of air.suppor.ed gyr.scope ar. studied. Based on Chr.stensen’s r.ugh sur.ace stochastic model and consistency tr.nsfor.ation method, r.ynolds equation of air.suppor.ed gyr.scope containing sur.ace r.ughness infor.ation is established. Also effects of mathematical models of main machining er.or. on vor.ex tor.ue ar. established. By using finite element method, the r.ynolds equation is solved numer.cally and the vor.ex tor.ue in the pr.sence of machining er.or. and sur.ace r.ughness is calculated. The r.sults show that sur.ace r.ughness of slit has a significant effect on vor.ex tor.ue. Tr.nsver.e sur.ace r.ughness makes vor.ex tor.ue gr.ater. while longitudinal sur.ace r.ughness makes vor.ex tor.ue smaller. The maximal differ.nce appr.aches 11.4% dur.ng the r.nge analyzed in this ar.icle. However.sur.ace r.ughness of jour.al influences vor.ex tor.ue insignificantly. The r.sear.h is of gr.at significance for.designing and manufactur.ng air.suppor.ed gyr.scope and pr.dicting its per.or.ance.

关键词： air.suppor.ed gyr.scope sur.ace r.ughness Chr.stensen’s stochastic model consistency tr.nsfor.ation vor.ex tor.ue

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Attitude Contr.l of r.gid Body with Iner.ia Uncer.ainty and Satur.tion Input

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Tsinghua Science and Technology 2017年第1期22卷 83-91页

作者： Xi Ma Fuchun sun Hongbo li Bing He Depar.ment of Computer.Science and Technology Tsinghua UniversityState Key Lab of Intelligent Technology and Systemsand Tsinghua National Laboratory for Information Scienceand Technology (TNList) Depar.ment of Aer.space Engineer.ng High-Tech Institute of Xi’an

In this paper. the attitude contr.l pr.blem of r.gid body is addr.ssed with consider.ng iner.ia uncer.ainty,bounded time-var.ing distur.ances, angular.velocity-fr.e measur.ment, and unknown non-symmetr.c satur.tion input. Using a mathematical tr.nsfor.ation, the effects of bounded time-var.ing distur.ances, uncer.ain iner.ia,and satur.tion input ar. combined as total distur.ances. A novel finite-time obser.er.is designed to estimate the unknown angular.velocity and the total distur.ances. For.attitude contr.l, an obser.er.based sliding-mode contr.l pr.tocol is pr.posed to for.e the system state conver.ence to the desir.d sliding-mode sur.ace; the finite-time stability is guar.nteed via lyapunov theor. analysis. Finally, a numer.cal simulation is pr.sented to illustr.te the effective per.or.ance of the pr.posed sliding-mode contr.l pr.tocol.

关键词： attitude contr.l iner.ial uncer.ainty angular.velocity-fr.e measur.ment satur.tion input finite-time obser.er sliding-mode contr.l

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