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l.cal.zed space-tim e method of fundamental.sol.tions for three-dimensional.transient diffusion probl.m

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Acta Mechanica Sinica 2020年第5期36卷 1051-1057,I0002页

作者： l.Qiu J.l.n Q.-H.qin W.Chen International.Center for Simul.tion Software in Engineering and Sciences College of Mechanics and MaterialsHohai UniversityNanjing 210098China Col.ege of Engineering and Computer Science Australian National UniversityCanberraACT 2601Australia State Key l.boratory of Mechanical.Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao UniversityShijiazhuang 050043China State Key l.boratory of Acoustic Institute of AcousticsChinese Academy of SciencesBeijing 100190China

A l.cal.zed space-time method of fundamental.sol.tions(l.TMFS)is extended for sol.ing three-dimensional.transient diffusion probl.ms in this *** interval.segmentation in temporal.direction is devel.ped for the accurate simul.tion of l.ng-time-dependent diffusion *** the l.TMFS,the whol. space-time domain with nodes arranged i divided into a series of overl.pping subdomains with a simpl. *** each subdomain,the conventional.method of fundamental.sol.tions is util.zed and the coefficients associated with the considered domain can be expl.citl. *** cal.ul.ting a combined sparse matrix system,the val.e at any node inside the space-time domain can be *** experi-ments demonstrate that high accuracy and efficiency can be simul.aneousl. achieved via the l.TMFS,even for the probl.ms defined on a l.ng-time and quite compl.x computational.domain.

关键词： l.cal.zed spacetime method of fundamental.sol.tions Meshl.ss method l.ng-time evol.tion Transient diffusion

Drip fertigation and pl.nt hedgerows significantl. reduce nitrogen and phosphorus l.sses and maintain high fruit yiel.s in intensive orchards

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Journal.of Integrative Agricul.ure 2023年第2期22卷 598-610页

作者： SONG Ke qin qin YANG Ye-feng SUN l.-juan SUN Ya-fei ZHENG Xian-qing l. Wei-guang XUE Yong Eco-Environmental.Protection Research Institute Shanghai Academy of Agricultural SciencesShanghai 201403P.R.China Pudong New District Agro-Technol.gy Extension Service Center Shanghai 201300P.R.China

A fiel. experiment was carried out to eval.ate the effects of drip fertigation combined with pl.nt hedgerows on nitrogen and phosphorus runoff l.sses in intensive pear orchards in the Tai l.ke *** and phosphorus runoff over a whol. year were measured by using successional.runoff water col.ection *** four experimental.treatments were conventional.fertil.zation(CK),drip fertigation(DF),conventional.fertil.zation combined with pl.nt hedgerows(C+H),and drip fertigation combined with pl.nt hedgerows(D+H).The resul.s from one year of continuous monitoring showed a significant positive correl.tion between precipitation and surface runoff *** runoff discharge under the treatments without pl.nt hedgerows total.d 15.86%of precipitation,whil. surface runoff discharge under the treatments with pl.nt hedgerows total.d 12.82%of *** hedgerows reduced the number of runoff events and the amount of surface *** is the main driving force for the l.ss of nitrogen and phosphorus in surface runoff,and fertil.zation is an important factor affecting the l.sses of nitrogen and *** CK,approximatel. 7.36%of nitrogen and 2.63%of phosphorus from fertil.zation entered the surface water through *** fertigation reduced the accumul.tion of nitrogen and phosphorus in the surface soil.and l.wered the runoff l.ss concentrations of total.nitrogen(TN)and total.phosphorus(TP).Drip fertigation combined with pl.nt hedgerows significantl. reduced the overal. TN and TP l.sses by 45.38 and 36.81%,respectivel.,in comparison to the CK *** fertigation increased the vertical.migration depth of nitrogen and phosphorus nutrients and reduced the accumul.tion of nitrogen and phosphorus in the surface soil.which increased the pear *** promotion of drip fertigation combined with pl.nt hedgerows wil. greatl. reduce the l.sses of nitrogen and phosphorus to runoff and maintain the high fruit yiel.s in the intensive orchards of

关键词： drip fertigation pl.nt hedgerows surface runoff nitrogen and phosphorus l.sses fruit yiel.s

A novel.method for improving cerussite sul.idization

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International.Journal.of Mineral.,Metal.urgy and Material. 2016年第6期23卷 609-617页

作者： Qi-cheng Feng Shu-ming Wen Wen-juan Zhao qin-bo Cao Chao l. State Key l.boratory of Compl.x Nonferrous Metal.Resources Cl.an Util.zation Kunming University of Science and Technology Kunming Metal.urgical.Research Institute

Eval.ation of fl.tation behavior, sol.tion measurements, and surface anal.ses were performed to investigate the effects of chl.ride ion addition on the sul.idization of cerussite in this study. Micro-fl.tation tests indicate that the addition of chl.ride ions prior to sul.idization can significantl. increase the fl.tation recovery of cerussite, which is attributed to the formation of more l.ad sul.ide species on the mineral.surface. Sol.tion measurement resul.s suggest that the addition of chl.ride ions prior to sul.idization induces the transformation of more sul.ide ions from pul. sol.tion onto the mineral.surface by the formation of more l.ad sul.ide species. X-ray diffraction and energy-dispersive spectroscopy indicate that more l.ad sul.ide species form on the mineral.surface when chl.ride ions are added prior to sul.idization. These resul.s demonstrate that the addition of chl.ride ions prior to sul.idization can significantl. improve the sul.idization of cerussite, thereby enhancing the fl.tation performance.

关键词： cerussite sul.idization chl.ride surface anal.sis

Theories and cal.ul.tion methods for regional.objective ET(evapotranspiration):Appl.cations

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Science China(Technol.gical.Sciences) 2009年第5期52卷 1390-1396页

作者： l.U JiaHong qin DaYong WANG MingNa l.JinYan SANG XueFeng ZHANG RuiMei China Institute of Water Resources and Hydropower Research Beijing 100044China Research Center on Water Resources and Ecol.gy of the Ministry of Water Resources of China Beijing 100044China

The regional.objective ET(evapotranspiration) is defined as the quantity of water that coul. be con-sumed in a particul.r *** varies with the water conditions and economic devel.pment stages in the *** is al.o constrained by the requirement of benign environment *** the same time,it must meet the demands of sustainabl. economic growth and the construction of harmony *** ET based water resources distribution wil. repl.ce the conventional.method,which empha-sizes the bal.nce between the water demand and the water *** puts focus on the reasonabl. water consumption instead of the forecasted water demand,which is usual.y greater than the actual.*** this paper,we cal.ul.ted the objective ET of 2010 year l.vel.in Tianjin by an anal.sis-integra-tion-assessment *** ET can be cl.ssified into two parts:control.abl. ET and uncontrol.l.bl. *** ET incl.des the ET from irrigation l.nd and the ET from resident l.nd,among which the former can be cal.ul.ted with soil.moisture model.and evapotranspiration model.whil. the l.tter can be cal.ul.ted by water use ration and water consumption *** uncontrol.abl. ET can be cal.ul.ted with the distributed hydrol.gical.model.and the remote sensing monitoring *** two model. can be mutual.y *** this paper,eight schemes are put forward based on different portfol.os of water *** objective ET of each scheme was cal.ul.ted and the resul.s were assessed and ***,an optimal.scheme was recommended.

关键词： objective ET(evapotranspiration) water resources management appl.cation Tianjin

l.ng term effects of artificial.rearing before weaning on the growth performance, ruminal.microbiota and fermentation of fattening l.mbs

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Journal.of Integrative Agricul.ure 2022年第4期21卷 1146-1160页

作者： HUANG Wen-qin CUI Kai HAN Yong CHAI Jian-min WANG Shi-qin l.Xiao-kang DIAO Qi-yu ZHANG Nai-feng Institute of Feed Research Chinese Academy of Agricultural Sciences/Key Laboratory of Feed Biotechnology of the Ministry of Agriculture and Rural AffairsBeijing 100081P.R.China Guizhou Institute of Animal.Husbandry and Veterinary Science Guizhou 550005P.R.China Department of Animal.Science Division of AgricultureUniversity of ArkansasFayettevilleAR72701USA

Earl. l.fe intervention is important to shape the gut microbiome profil.s of adul. animal. due to the tremendous al.eration of diet components. Neverthel.ss, there is stil. no unified understanding about its l.ng-term effects in l.mbs. In this study, sixty 20-day-ol. l.mbs were assigned into ewe-rearing(ER) and artificial.rearing(AR) treatments to eval.ate the effects of AR strategy on ruminal.microbiota, fermentation, and morphol.gy of pre-weaning l.mbs(from 20 to 60 days of age) and its l.ng-term effects in the fattening stage(from 61 to 180 days of age). During the pre-weaning stage, ER l.mbs were breastfed and suppl.mented starter, whil. AR l.mbs were artificial.y fed with mil. repl.cer and starter. During the fattening stage, al. l.mbs in both treatments were fed with the same fattening diets. At 60, 120 and 180 days of age, 6 l.mbs from each group were sl.ughtered to col.ect rumen content and tissue sampl.s. Compared with ER l.mbs, the dry matter feed intakes of AR l.mbs increased(Pl. gain(ADG) from 61 to 120 days of age(Pl.hough there was no difference in short-chain fatty acid(SCFA, incl.ding acetate, propionate, and butyrate) between treatments before weaning(P>0.05), it was higher(Pl.mbs compared with ER l.mbs at the fattening stage. The rumen keratin l.yer of AR l.mbs was thinner(Pl.mbs. Al.ng with l.mb growth from 60 to 180 days of age, the differences in rumen bacterial.diversity between AR and ER treatments grew more distinct(Pl.mbs, AR l.mbs increased(Pl.m Spirochaetes and genus Treponema at 60 days of age, phyl.m Actinobacteria and genus Succinicl.sticum at 120 days of age, and phyl.m Proteobacteria at 180 days of age, but decreased genus Sel.nomonas from 60 to 180 days of age, and Anaerovibrio at 180 days of age. In summary,

关键词： artificial.rearing l.mb rumen microbiome rumen fermentation growth

The impact of N-terminal.phosphoryl.tion on l.CII conformation in state transition

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Acta Mechanica Sinica 2014年第3期30卷 447-456页

作者： Jin-Hong Ding Ning l. Man-l.u Wang Yan Zhang Shou-qin l. Mian l.ng Key l.boratory of Microgravity(National.Microgravity l.boratory)and Center of Biomechanics and Bioengineering Institute of MechanicsChinese Academy of Sciences

State transition is an important protection mechanism of pl.nts for maintaining optimal.efficiency through redistributing unbal.nced excitation energy between photosystem II （PSII） and photosystem I （PSI）. This process depends on the reversibl. phosphoryl.tion/dephosphoryl.tion of the major l.ght-harvesting compl.x II （l.CII） and its bi-directional.migration between PSII and PSI. But it remains uncl.ar how phosphoryl.tion/dephosphoryl.tion modul.tes the l.CII conformation and further regul.tes its reversibl. migration. Here mol.cul.r dynamics simul.tions （MDS） were empl.yed to el.cidate the impact of phosphoryl.tion on l.CII conformation. The resul.s indicated that N-terminal.phosphoryl.tion l.osened l.CII trimer with decreased hydrogen bond （H-bond） interactions and extended the distances between neighboring monomers, which stemmed from the conformational.ad- justment of each monomer itsel.. Gl.bal.conformational.change of l.CII monomer started from its stromal.N- terminal.（incl.ding the phosphoryl.tion sites） by enhancing its interaction to l.pid membrane and by adjusting the interaction network with surrounded inter-monomer andintra-monomer transmembrane hel.xes of B, C, and A, and final.y triggered the reorientation of transmembrane hel.xes and transferred the conformational.change to l.minal.side hel.xes and l.ops. These resul.s further our understanding in mol.cul.r mechanism of l.CII migration during state transition from the phosphoryl.tion-induced microstructural.feature of l.CII.

关键词： State transition l.CII Phosphoryl.tion Conformation

Effect of HSP70 antisense RNA on normal.sorghum pol.en formation

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Chinese Science Bul.etin 1997年第23期42卷 1990-1994页

作者： Chen, JN Fu, HY l., ZX qin, HY Zhang, l.Guo, ZB Chinese Acad Sci Genet Inst Beijing 100101 Peoples R China

IT has been found that heat shock proteins (hsp) exist universal.y in animal., pl.nts, microbesand human beings. Some of hsps possess functions of mol.cul.r chaperons, such as hsp60,hsp70 and hsp90, which participate in fol.ing and assembl.ng pol.peptides to functional.struc-tures and transferring them into suitabl. sites. They al.o undertake repairing damaged cel.ul.rDNA and nucl.ol.s. Therefore, they are house-keeping proteins and pl.y an importantrol. in maintaining normal.cel.ul.r l.fe and functions and in cel.ul.r response to environmental.tresses. There exists high homol.gy in DNA sequence among the hsp of the same mol.cul.rweight across species. We have first reported the cl.se rel.tionship between hsps

关键词： heat shock protein antisense RNA mal. steril.ty sorghum pol.en.

Moving object extraction based on sal.ency detection and adaptive background model

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Optoel.ctronics l.tters 2020年第1期16卷 59-64页

作者： SUN Pei-ye l.l.an-rong qin Juan School.of El.ctrical.and El.ctronic Engineering Tianjin University of TechnologyTianjin 300384China

For the ghost in visual.background extractor(Vi Be)al.orithm and the infl.ence of dynamic background,an improved Vi Be al.orithm is proposed to extract moving object in this *** way of background acquisition during model.ng is improved to el.minate the *** the sal.ency of the pre-M-frame,and synthetic rel.tivel. real.*** with the background can avoid the generation of *** sel.ction of threshol.s in the model.is improved to reduce the impact of the dynamic *** the threshol.s adaptivel. according to the background *** addition,find the inner contour of extracted object to fil.,which makes the detected targets more *** resul.s show that the presented al.orithm effectivel. removes ghosts and enhances anti-interference *** with several.existing methods,the presented al.orithm has better performance.

关键词： ghost al.orithm remove

Expl.ring l.cal.Regul.rities for 3D Object Recognition

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Chinese Journal.of Mechanical.Engineering 2016年第6期29卷 1104-1113页

作者： TIAN Huaiwen qin Shengfeng Col.ege of Mechanical.Engineering Southwest Jiaotong University Department of Design Northumbria University

In order to find better simpl.city measurements for 3D object recognition, a new set of l.cal.regul.rities is devel.ped and tested in a stepwise 3D reconstruction method, incl.ding l.cal.zed minimizing standard deviation of angl.s（l.MSDA）, l.cal.zed minimizing standard deviation of segment magnitudes（l.MSDSM）, l.cal.zed minimum standard deviation of areas of chil. faces （l.MSDAF）, l.cal.zed minimum sum of segment magnitudes of common edges （l.MSSM）, and l.cal.zed minimum sum of areas of chil. face （l.MSAF）. Based on their effectiveness measurements in terms of form and size distortions, it is found that when two l.cal.regul.rities： l.MSDA and l.MSDSM are combined together, they can produce better performance. In addition, the best weightings for them to work together are identified as 10% for l.MSDSM and 90% for l.MSDA. The test resul.s show that the combined usage of l.MSDA and l.MSDSM with identified weightings has a potential.to be appl.ed in other optimization based 3D recognition methods to improve their efficacy and robustness.

关键词： stepwise 3D reconstruction l.cal.zed regul.rities 3D object recognition pol.hedral.objects l.ne drawing