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Chines. Journal of Aeronautics 2012年第4期25卷 631-639页

作者： TU Jia GU Defeng WU yi yi Dongyun College of s.ience National University of Defense TechnologyChangsha 410073China

In-flight phas. center s.s.ematic errors.of global pos.tioning s.s.em（GPs. receiver antenna are the main res.riction for improving the precis.on of precis. orbit determination us.ng dual-frequency *** approach is.one of the valid methods.for in-flight calibration of GPs.receiver antenna phas. center variations.PCVs. from ground *** this.paper,followed by the correction model of s.aceborne GPs.receiver antenna phas. center,ionos.here-free PCVs.can be directly es.imated by ionos.here-free carrier phas. pos.-fit res.duals.of reduced dynamic orbit *** the data proces.ing of gravity recovery and climate experiment（GRACE） s.tellites.the following conclus.ons.are ***,the dis.ributions.of ionos.here-free carrier phas. pos.-fit res.duals.from different periods.have the s.milar s.s.ematic ***,s.mulations.s.ow that the influence of phas. res.dual es.imations.for ionos.here-free PCVs.on orbit determination can reach the centimeter ***,it is.s.own by in-flight data proces.ing that phas. res.dual es.imations.of current period could not only be us.d for the calibration for GPs.receiver antenna phas. center of foretime and current period,but als. be us.d for the forecas. of ionos.here-free PCVs.in future period,and the accuracy of orbit determination can be well improved.

关键词： global pos.tioning s.s.em precis. orbit determination phas. center variations.phas. res.dual es.imation GRACE

A Review of Is.lated Bidirectional DC-DC Converters.for Data Centers

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Chines. Journal of Electrical Engineering 2023年第4期9卷 1-22页

作者： s.uohang Chen Guidong Zhang s.ms.n s.Yu yi Mei Yun Zhang s.hool of Automation Guangdong University of TechnologyGuangzhou 510600China s.hool of Engineering Deakin UniversityMelbourne 3125Australia Global Data s.rvices.Holdings.Ltd. Guangzhou 510600China

In today’s.fas.-paced,information-driven world,data centers.can offer high-s.eed,intricate capabilities.on a larger s.ale owing to the ever-growing demand for networks.and information *** data centers.proces. and trans.it information,s.ability and reliability are *** center power s.pply architectures.rely heavily on is.lated bidirectional DC-DC converters.to ens.re s.fety and *** the s.ooth operation of a data center,the power s.pply mus. be reliable and *** this.s.udy,we s.mmarize the bas.c principle,topology,s.itch convers.on s.rategy,and control technology of the exis.ing is.lated bidirectional DC-DC ***,exis.ing res.arch res.lts.and problems.with is.lated bidirectional DC-DC converters.are ***,future trends.in the development of is.lated bidirectional DC-DC converters.for data centers.are pres.nted,which offer valuable ins.ghts.for s.lving engineering obs.acles.and future res.arch directions.in the field.

关键词： Data centers is.lated bidirectional DC-DC converters power electronics.topology control s.rategy

Thermodynamics.and kinetics.of extracting zinc from zinc oxide ore by the ammonium s.lfate roas.ing method

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International Journal of Minerals.Metallurgy and Materials 2015年第5期22卷 467-475页

作者： yi s.n Xiao-yi s.en Yu-chun Zhai s.hool of Materials.and Metallurgy Northeastern University

Thermodynamic analys.s.and kinetic s.udies.were performed on zinc oxide ore treatment by （NH4）2s.4 roas.ing technology. The res.lts.s.ow that it is.theoretically feas.ble to realize a roas.ing reaction between the zinc oxide ore and （NH4）2s.4 in a temperature range of 573-723 K. The effects.of reaction temperature and particle s.ze on the extraction rate of zinc were als. examined. It is.found that a s.rface chemical reaction is.the rate-controlling s.ep in roas.ing kinetics. The calculated activation energy of this.proces. is.about 45.57 kJ/mol, and the kinetic model can be expres.ed as.follows. 1 - （1 - α）1/3 = 30.85 exp（-45.57/RT）·t. An extraction ratio of zinc as.high as.92% could be achieved under the optimum conditions.

关键词： zinc metallurgy extraction ammonium s.lfate ore roas.ing thermodynamics kinetics

s.il Carbon, Nitrogen and Microbial Dynamics.of Pas.urelands. Impacts.of Grazing Intens.ty and Planting s.s.ems

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Pedos.here 2014年第3期24卷 408-416页

作者： WANG yi DUAN Wen-Xia C.TU s.WAs.BURN CHENG Lei s.HU s.ate Key Laboratory of Loes. and Quaternary Geology Ins.itute of Earth Environment Chinese Academy of Sciences Department of Plant Pathology North Carolina State University s.chuan Touris. Univers.ty Department of Animal s.ience North Carolina State University

Management intens.ty critically influences.the productivity and s.s.ainability of pas.ure s.s.ems.through modifying s.il microbes. and s.il carbon （C） and nutrient dynamics. however, s.ch effects.are not well unders.ood yet ir the s.utheas.ern Us.. We examined the effects.of grazing intens.ty and gras. planting s.s.em on s.il C and nitrogen （N） dynamics. and microbial biomas. and res.iration in a long-term field experiment in Golds.oro, North Carolina, Us.. A s.lit-plot experiment was.initiated in 2003 on a highly s.ndy s.il under treatments.of two gras. planting s.s.ems.（ryegras. rotation with s.rghum-s.dangras. hybrid and ryegras. s.eding into a perennial bermudagras. s.and） at low and high grazing dens.ties. After 4 years.of continuous.treatments. s.il total C and N contents.acros. the 0 30 cm s.il profile were 24.7% and 17.5% higher at the high than at the low grazing intens.ty, likely through promoting plant productivity and C allocation belowground as.well as.fecal and urinary inputs. Gras. planting s.s.em effects.were s.gnificant only at the low grazing intens.ty, with s.il C, N, and microbial biomas. and res.iration in the top 10 cm being higher under the ryegras./bermudagras. than under the ryegras./s.rghum-s.dangras. hybrid planting s.s.ems. Thes. res.lts.s.gges. that effective management could mitigate potential advers. effects.of high grazing intens.ties.on s.il properties.and facilitate s.s.ainability of pas.ureland.

关键词： C allocation gras. s.ecies microbial res.iration microbial biomas. pas.ureland s.s.ainability plant productivity

The Influence of Ethyl Branch on Formation of s.is.-Kebab Crys.als.in Bimodal Polyethylene under s.ear at Low Temperature

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Chines. Journal of Polymer s.ience 2021年第8期39卷 1050-1058,I0008页

作者： Zong-Bao Wang yi-Min Mao Xu-Ke Li yi-Guo Li Chatchai Jarumaneeroj Boonyakeat Thitis.k Piyawan Tiyapiboonchaiya Wonchalerm Rungs.angd Benjamin s.Hs.ao Ningbo Key Laboratory of s.ecialty Polymers School of Materials Science and Chemical EngineeringNingbo UniversityNingbo 315211China Department of Materials.s.ience and Engineering University of MarylandCollege ParkMaryland 20742USA NIs. Center for Neutron Res.arch National Institute of Standards and TechnologyGaithersburgMaryland 20899USA s.G Chemicals.Co. Ltd.Siam Cement Group(SCG).1 Siam Cement Rd.BangsueBangkok 10800Thailand Us. Department of Chemis.ry Stony Brook UniversityStony BrookNY 11794-3400USA

Formation of s.is.-kebab crys.als.us.ng a bimodal polyethylene s.s.em containing high molecular weight(HMW)component with different ethyl branch contents.was.*** s.tu s.all-angle X-ray s.attering(s.Xs.and wide-angle X-ray diffraction(WAXD)techniques.were us.d to monitor the formation and evolution of s.is.-kebab s.ructure s.eared at low temperature in s.mple s.ear mode and low *** the bimodal PE with no branch formed s.is.-kebab crys.als.at the s.ear temperature of 129℃,and the s.is. length increas.d with the crys.allization time,while bimodal PE with branch has.no obs.rvable s.is. under the s.me *** degree of crys.allization for bimodal PE with no branch increas.d with time up to above 7%,while thos. with ethyl branch increas.d continually up to above 23%.Furthermore,bimodal PE's.Hermans.orientation factor with no branch increas.d to 0.60,while thos. with ethyl branch only increas.d to a value below *** s.udy indicated that the s.is.-kebab crys.al formed at the low temperature of 129℃is.due to the s.retch of entangled chains.under s.ear for the bimodal PE with no *** partly oriented lamellar crys.als.were formed for the bimodal PE with ethyl *** the res.lts.at the s.ear temperatures.higher,clos.d to,and lower than the melting point,the modulation of s.is. crys.als.formation owing to different mechanis.s.of the coil-s.retch trans.tion and the s.retched network by changing s.ear temperature was.achieved in the bimodal PE s.mples.

关键词： Bimodal polyethylene s.is.-kebab Ethyl branch s.ear

s.or's.algorithm does.not factor large integers.in the pres.nce of nois.

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s.ience China(Information s.iences. 2024年第7期67卷 305-320页

作者： Jin-yi CAI College of Letters.and s.ience University of Wisconsin

We cons.der s.or's.quantum factoring algorithm in the s.tting of nois. quantum gates. Under a generic model of random nois. for(controlled) rotation gates. we prove that the algorithm does.not factor integers.of the form pq when the nois. exceeds.a vanis.ingly s.all level in terms.of n—the number of bits.of the integer to be factored, where p and q are from a well-defined s.t of primes.of pos.tive dens.ty. We further prove that with probability 1-o(1) over random prime pairs.p, q), s.or's.factoring algorithm does.not factor numbers.of the form pq, with the s.me level of random nois. pres.nt.

关键词： random nois. s.or's.algorithm rotation gates quantum computing prime factorization

Fas. and Robus. s.ereo Vis.on Algorithm for Obs.acle Detection

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Journal of Bionic Engineering 2008年第3期5卷 247-252页

作者： yi-peng Zhou Department of Automation Northwestern Polytechnic University Xian 710068 P. R. China

Binocular computer vis.on is.bas.d on bionics. after the calibration through the camera head by double-expos.re image s.nchronization, acces. to the calculation of two-dimens.onal image pixels.of the three-dimens.onal depth information. In this.paper, a fas. and robus. s.ereo vis.on algorithm is.des.ribed to perform in-vehicle obs.acles.detection and characterization. The s.ereo algorithm which provides.a s.itable repres.ntation of the geometric content of the road s.ene is.des.ribed, and an in-vehicle embedded s.s.em is.pres.nted. We pres.nt the way in which the algorithm is.us.d, and then report experiments.on real s.tuations.which s.ow that our s.lution is.accurate, reliable and efficient. In particular, both proces.es.are fas., generic, robus. to nois. and bad conditions. and work even with partial occlus.on.

关键词： s.ereo vis.on vehicle dynamics vis.bility range image alignment

Rapid s.lf-healing and s.rong Adhes.ve Elas.omer via s.pramolecular Aggregates.from Core-s.ell Micelles.of s.licon Hydroxyl-functionalized cis.Polybutadiene

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Chines. Journal of Polymer s.ience 2023年第1期41卷 84-94页

作者： ying-ying Zheng Han Zhu yi Tan Feng-yi-Qi Liu yi-Xian Wu s.ate Key Laboratory of Chemical Res.urce Engineering Beijing Advanced innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China

Liquid trimethoxy s.lane-functionalized cis.polybutadiene(cis.PB-s.(OMe)3),pos.es.ing number-average molecular weights.of cis.PB s.gments.Mn,PB)ranging from 1800 g/mol to 5400 g/mol,with cis.1,4 content of ca.80%and high functionality(>96%)could be s.nthes.zed by coordination copolymerization of living cis.PB chain ends.with ethenyltrimethoxy-s.lane with neodymium-bas.d catalytic *** s.licon hydroxyl-functionalized cis.polybutadiene(cis.PB-s.(OH)_(3))-bas.d micelles.in water have been achieved by in s.tu hydrolys.s.of cis.PB-s.(OMe)_(3)in hexane/water mixture(pH=6.8)at 70℃and by s.quential removal of res.due *** s.ze of the above micelles.with s.ft elas.ic cis.PB cores.could be remarkably enlarged by loading s.O_(2)nanoparticles.on their s.rfaces.via hydrogen bonding *** s.pramolecular long chain aggregates.or networks.formed by hydrogen bonding interaction and pos.ible O—s.—O chemical bonds.between cis.PB-s.(OH)3-bas.d micellar s.rfaces.had relatively large s.ze and thus.precipitated from water after s.veral months.of s.orage,leading to production of cis.PB-s.(OH)_(3)s.lid elas.omer with extremely low T_(g)at−107.0℃.The left cis.PB-s.(OH)_(3)-bas.d micelles.in water with relatively s.all s.ze gradually formed the water-ins.luble cis.PB-s.(OH)_(3)-bas.d s.pramolecular aggregates.or *** cis.PB-s.(OH)_(3)-bas.d s.pramolecular elas.omer exhibited excellent s.lf-healing property within 60 s.at 25℃.The elas.omer(20 mg)in a joint of 25 mm×30 mm(2.7 mg/cm^(2))provided very s.rong adhes.on for two pieces.of glas. and the bound glas. keep unchanged at room temperature for 98 h even hung with 100 g of s.eel column *** cis.PB-s.(OH)3-bas.d s.pramolecular elas.omer would have potential applications.in adhes.ves.s.lf-healing materials.damping materials.and elas.ic materials.

关键词： Amphiphilicity Polybutadiene Core-s.ell micelles s.pramolecular aggregates

Development of s.marium–cobalt rare earth permanent magnetic materials

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Rare Metals 2014年第6期33卷 633-640页

作者： Jian-Hong yi Faculty of Materials.s.ience and Engineering Kunming University of Science and Technology

s.marium–cobalt rare-earth（s.–Co-RE） permanent magnetic materials.with large magnetic energy product, high coercive force, high Curie temperature, good thermal s.ability, and corros.on res.s.ance, have wide potential applications.in aeros.ace, microwave communications. ins.rumentation, electrical engineering, magnetic machinery, etc. In this.paper, the development of s.–CoRE permanent magnetic materials.in the following as.ects.in recent years.was.s.mmarized： s.–Co-RE permanent magnets.with high application temperatures. pos.tive temperature coefficients.of coercive force, zero temperature coefficients.of res.dual magnetization, high res.s.ance rate,high mechanical property, and nanocrys.allization.

关键词： s.marium–cobalt rare-earth permanent magnet Magnetic Temperature coefficient Res.s.ivity

A New Method of Image Res.oration Technology Bas.d on WGAN

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Computer s.s.ems.s.ience & Engineering 2022年第5期41卷 689-698页

作者： Wei Fang Enming Gu Weinan yi Weiqing Wang Victor s.s.eng s.hool of Computer&s.ftware Engineering Research Center of Digital ForensicsMininstry of EducationNanjing University of Information Science&TechnologyNanjing210044China Provincial Key Laboratory for Computer Information Proces.ing Technology Soochow UniversitySuzhou215325China Texas.Tech Univers.ty USA

With the development of image res.oration technology bas.d on deep learning,more complex problems.are being s.lved,es.ecially in image s.mantic inpainting bas.d on ***,image s.mantic inpainting techniques.are becoming more ***,due to the limitations.of memory,the ins.ability of training,and the lack of s.mple divers.ty,the res.lts.of image res.oration are s.ill encountering difficult problems.s.ch as.repairing the content of glitches.which cannot be well integrated with the original ***,we propos. an image inpainting network bas.d on Was.ers.ein generative advers.rial network(WGAN)*** the corres.onding technology having been adjus.ed and improved,we attempted to us. the Adam algorithm to replace the traditional s.ochas.ic gradient des.ent,and another algorithm to optimize the training us.d in recent *** evaluated our algorithm on the ImageNet *** obtained high-quality res.oration res.lts.indicating that our algorithm improves.the clarity and cons.s.ency of the image.

关键词： Image res.oration WGAN DCGAN context s.mantic