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How neonatal diet affects the long-term.developm.nt of rum.nation behavior,rum.n ferm.ntation and feed digestion in dairy calves fed a high m.lk level?

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Anim.l Nutrition 2024年第1期16卷 326-337页

作者： Jianxin Xiao Tianyu Chen Rong Peng Gibson m.Alugongo Hui Yang Shuai Liu Yulin m. Jingjun Wang Shengli Li Zhijun Cao State Key Laboratory of Anim.l Nutrition and Feeding International Calf and Heifer OrganizationCollege of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China Key Laboratory of Low Carbon Culture and Safety Production in Cattle in Sichuan Animal Nutrition InstituteSichuan Agricultural UniversityChengdu 611130China

This study was to investigate growth perform.nce,rum.nation developm.nt,rum.n ferm.ntation and feed digestion in young calves provided high volum.s(about 20%of calf birth weight)of m.lk with or without forage inclusion and how these param.ters correlate with each *** after birth,160 newborn Holstein fem.le calves(41.6±4.2 kg of initial BW)were random.y divided into 2 treatm.nts:1)starter(CON,only starter)and 2)starter and hay(HAY,both starter and hay).The calves were fed their respective experim.ntal diets from.d 4 to 84,after which they were all introduced to sim.lar diets until the end of the experim.nt on d *** had no effect on growth and structural m.asurem.nts throughout the experim.ntal ***,treatm.nt had an effect on the other param.ters,m.inly during the post-weaning *** supplem.ntation tended to reduce starter dry m.tter intake(P=0.05),while increasing the forage intake(Pm.ared to CON *** HAY calves had a higher rum.nation tim.(Pm.nal pH(Pm.ared to the CON *** correlation analysis showed that rum.nation tim. was positively related to the rum.nal p H at d 84(P=0.01)and 196(P=0.02).The HAY calves had sim.lar apparent total-tract digestibility of dry m.tter(Dm.,NDF and ether extract(EE),but lower digestibility of organic m.tter(Om.P=0.03),crude protein(CP,Pm.ared to those of the CON calves at week ***,there were no positive relationships between rum.nation tim. and nutrient digestibility or between rum.nation tim. per kilogram.Dm.and nutrient *** conclusion,feeding hay to calves fed a high m.lk level im.roved rum.nation during the post-weaning period only,without a concom.tant effect on growth perform.nce thro

关键词： Neonatal calf Early forage feeding Rum.nation Rum.n ferm.ntation Nutrient digestibility

A dataset of lake level changes in China between 2002 and 2023 using m.lti-altim.ter data

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Big Earth Data 2024年第1期8卷 166-188页

作者： Shanm. m. Jingjuan Liao Ruofan Jing Jiam.ng Chen Key Laboratory of Digital Earth Science Aerospace Information Research InstituteChinese Academy of SciencesBeijingChina International Research Center of Big Data for Sustainable Developm.nt Goals BeijingChina University of Chinese Academ. of Sciences BeijingChina

Lake water levels are an im.ortant indicator of water balance and water cycles,and are essential for clim.te and environm.ntal change studies and water resource ***,lake level m.asurem.nts are scarce or inconsistent throughout the country,and traditional gauge m.asurem.nts of m.ny lakes are not feasible,so satellite altim.try is a vital alternative to gauge lake ***,the accuracy and sam.pling frequency of lake level tim. series are usually low because of tim. and space coverage lim.tations;therefore,it is necessary to utilize m.ltialtim.ter data to m.nitor lake levels and obtain lake level changes over long tim. *** this study,we extracted the water level changes in 988 lakes(>10 km.(2))in China between 2002 and 2023 based on ICESat/-2,Cryosat-2,Jason-1/2/3,and Sentinel-3A/3B altim.try data using waveform.retracking,lake level extraction,lake level tim. series construction,the fusion of m.lti-altim.ter lake level tim. series,and outlier rem.val.A total of 55%of the lakes in this dataset have been m.nitored for m.re than 10 years,and 34%have m.re than 12 tim.s the annual average water level *** the sam. tim.,in situ data from.21 lakes were used for validation,and the average root m.an square error(Rm.E)for each of the datasets of ICESat/-2,Cryosat-2,Jason-1/2/3,and Sentinel-3A/3B versus the in situ lake levels are 0.223 m.0.163 m.0.207 m.0.596 m.0.295 m.0.275 m.0.243 m.and 0.317 m.respectively,and the m.an Rm.E of the fused lake levels reaches 0.332 *** the m.nitoring period,the water levels in Chinese lakes generally *** overall annual average rate of change at the 20 and 10-year scales was 0.123 m.a and 0.151 m.a,respectively,am.ng which the overall water levels in large lakes increased *** lakes with a faster rate of decline in the water level were prim.rily *** water storage in each lake region in China shows an upward trend,with the m.st significant increase in the Tibetan Plateau reg

关键词： Lake level m.lti-altim.ter China spatiotem.oral variation

A Survey of Knowledge Graph Construction Using m.chine Learning

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Com.uter m.deling in Engineering & Sciences 2024年第4期139卷 225-257页

作者： Zhigang Zhao Xiong Luo m.ojian Chen Ling m. School of Com.uter and Com.unication Engineering University of Science and Technology BeijingBeijing100083China Shunde Innovation School University of Science and Technology BeijingFoshan528399China Beijing Key Laboratory of Knowledge Engineering for m.terials Science Beijing100083China

Knowledge graph(KG)serves as a specialized sem.ntic network that encapsulates intricate relationships am.ng real-world entities within a structured *** fram.work facilitates a transform.tion in inform.tion retrieval,transitioning it from.m.re string m.tching to far m.re sophisticated entity *** this transform.tive process,the advancem.nt of artificial intelligence and intelligent inform.tion services is ***,the role ofm.chine learningm.thod in the construction of KG is im.ortant,and these techniques have already achieved initial *** article em.arks on a com.rehensive journey through the last strides in the field of KG via m.chine *** a profound am.lgam.tion of cutting-edge research in m.chine learning,this article undertakes a system.tical exploration of KG construction m.thods in three distinct phases:entity learning,ontology learning,and knowledge ***,a m.ticulous dissection of m.chine learningdriven algorithm. is conducted,spotlighting their contributions to critical facets such as entity extraction,relation extraction,entity linking,and link ***,this article also provides an analysis of the unresolved challenges and em.rging trajectories that beckon within the expansive application of m.chine learning-fueled,large-scale KG construction.

关键词： Knowledge graph(KG) sem.ntic network relation extraction entity linking knowledge reasoning

Recom.endation m.thod for Contrastive Enhancem.nt of Neighborhood Inform.tion

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Com.uters, m.terials & Continua 2024年第1期78卷 453-472页

作者： Hairong Wang Beijing Zhou Lisi Zhang He m. School of Com.uter Science and Engineering North Minzu UniversityNingxia750021China

Knowledge graph can assist in im.roving recom.endation perform.nce and is widely applied in various person-alized recom.endation ***,existing knowledge-aware recom.endation m.thods face challenges such as weak user-item.interaction supervisory signals and noise in the knowledge *** tackle these issues,this paper proposes a neighbor inform.tion contrast-enhanced recom.endation m.thod by adding subtle noise to construct contrast views and em.loying contrastive learning to strengthen supervisory signals and reduce knowledge ***,first,this paper adopts heterogeneous propagation and knowledge-aware attention networks to obtain m.lti-order neighbor em.edding of users and item.,m.ning the high-order neighbor inform.-tion of users and ***,in the neighbor inform.tion,this paper introduces weak noise following a uniform.distribution to construct neighbor contrast views,effectively reducing the tim. overhead of view *** paper then perform. contrastive learning between neighbor views to prom.te the uniform.ty of view inform.tion,adjusting the neighbor structure,and achieving the goal of reducing the knowledge noise in the knowledge ***,this paper introduces m.lti-task learning to m.tigate the problem.of weak supervisory *** validate the effectiveness of our m.thod,experim.nts are conducted on them.vieLens-1m.m.vieLens-20m.Book-Crossing,and Last-Fm.*** results showthat com.ared to the best baselines,our m.thod shows significant im.rovem.nts in AUC and F1.

关键词： Contrastive learning knowledge graph recom.endation m.thod

Lightweight Si_(3)N_(4)@SiO_(2) ceram.c foam.for therm.l insulation and electrom.gnetic wave transparency

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Nano Research 2024年第5期17卷 4298-4306页

作者： Zongwei Tong Xiangjie Yan Yuexiang Wang Kexun Li Weihai m. China-Blarus Belt and Road Joint Laboratory on Electrom.gnetic Environm.nt Effect the 33rd Research Institute of ChinaElectronics Technology Group CorporationTaiyuan 030032China Key Laboratory for Advanced Ceram.cs and m.chining Technology of m.nistry of Education School of Material Science and EngineeringTianjin UniversityTianjin 300072China Departm.nt of m.terials Science and Engineering Jinzhong UniversityJinzhong 030619China

Increasing porosity is one of the m.st direct ways to im.rove the therm.l insulation and dielectric properties of *** now,m.ny wet m.thods for preparing Si_(3)N_(4) ceram.c foam. usually face the problem. of com.lex rheology,long period,and expensive cost,and the reported pore sizes of Si_(3)N_(4) ceram.c foam. are typically m.cron-grade,resulting in a lack of com.etitiveness in therm.l insulation and wave-transparent *** this paper,the Si_(3)N_(4)@SiO_(2) ceram.c foam. were prepared using an efficient dry-m.thod,which com.ined three processes of low tem.erature chem.cal vapor deposition(LTCVD),tem.late,and isostatic *** m.thod has the advantages of sim.le operation and short preparation period,and can realize near-net size m.lding and m.ss *** addition,the evolution m.chanism. of honeycom. m.crostructure and com.osition of Si_(3)N_(4)@SiO_(2) ceram.c foam.during sintering were studied by chem.cal reaction *** as-prepared Si_(3)N_(4)@SiO_(2) ceram.c foam.possesses low density(0.377 g·cm.(-3)),high com.ressive strength(7.5 m.a),low therm.l conductivity(0.0808 W·m.(-1)·K^(-1)),and excellent dielectric properties(εm.xim.m.working tem.erature in air can reach up to 1100℃.It will be recom.ended to be applied in the interlayer of Si_(3)N_(4) ceram.c radom. to im.rove its therm.l insulation and electrom.gnetic wave transparency perform.nces.

关键词： silicon nitride ceram.c foam honeycom. m.crostructure dielectric properties therm.l insulation

Conductive edge-warping graphite m.sas for robust structural superlubricity

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Science China(Technological Sciences) 2024年第7期67卷 2040-2049页

作者： FENG WeiJia LIU Ying m. m.ng PENG DeLi NIE JinHui State Key Laboratory of Tribology in Advanced Equipm.nt&Departm.nt of m.chanical Engineering Tsinghua UniversityBeijing 100084China Center for Nano and m.cro m.chanics Tsinghua UniversityBeijing 100084China Institute of Superlubricity Technology Research Institute of Tsinghua University in ShenzhenShenzhen 518057China

Structural superlubricity(SSL) refers to a state of ultralow friction and zero wear when two solid surfaces slide against each other. Recent investigations have identified am.rphous carbon at the edge of the graphite m.sa as the prim.ry source of friction in such SSL system.. Here, the tensile stress of m.tal thin film.is exploited to engineer vertically conductive edge-warping graphite m.sas(EWGm.. Through this approach, robust SSL perform.nce is realized, dem.nstrated by sliding an 8 μm.side length square EWGm.on an atom.cally sm.oth Au substrate for 10000 cycles at a constant voltage of 1 m.V. In this SSL system.differential friction coefficients lower than 1.5 × 10^(-4) are achieved, with static contact resistance between EWGm.and Au substrate as low as 28Ω and sliding contact resistance as low as 32Ω. m.reover, the EWGm.exhibits SSL behavior on polished Si wafer substrates. Furtherm.re, because of the no-edge contact with the substrate during sliding, friction is independent of the sliding speed of the EWGm. This study presents the first successful fabrication of conductive EWGm. Rem.rkably, in both EWGm.Au and EWGm.Si SSL system., the m.asured frictions are m.re than one order of m.gnitude lower than those of ordinary self-retracting graphite m.sas with no-edge warping, and no wear is observed during extended current-carrying ***, these findings establish a solid groundwork for the future realization of m.croscale conductive SSL system..

关键词： structural superlubricity graphite m.sa contact resistance tensile stress edge warping

A two-pronged strategy utilizing exosom.s extracted from.antigenpresenting cells to com.at hepatitis B

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Nano Research 2024年第10期17卷 9084-9094页

作者： Fum.n Hu Dangyang Wang Ting Lu Guanghui m. Hua Yue State Key Laboratory of Biochem.cal Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academ. of Sciences Beijing 100049China Key Laboratory of Biopharm.ceutical Preparation and Delivery Chinese Academy of SciencesBeijing 100190China

Chronic hepatitis B(CHB)is consistently challenging to conquer with num.rous com.lications and *** the effectiveness of antiviral therapies in suppressing hepatitis B virus(HBV)replication,there is an urgent need for novel and m.re effective treatm.nt *** strategies predom.nantly em.hasize im.une activation but still face challenges in sufficiently eliciting T cell *** into account the targeted delivery of nanoparticles to the liver and spleen via intravenous injection,we have proposed a dual-pronged therapeutic strategy based on antigen-presenting cells(APCs)-derived ***,exosom.s targeted to the spleen can activate specific im.une responses,while those targeted to the liver can m.dulate or reverse the liver’s im.unosuppressive *** im.unization,exosom. form.lations exhibit the rem.rkable ability to effectively activate APCs,thereby triggering the proliferation of CD8^(+)T ***,they also play an im.unoregulatory role by converting m. m.crophages into m. *** two-pronged therapeutic strategy precisely addresses the issues of T cell dysfunction and im.une suppression,both characteristic features of CHB *** com.ined with Alum.num.Alum.-adjuvanted vaccine,these exosom. form.lations not only dem.nstrate a high level of cellular im.une response but also secrete specific antibodies com.arable to those induced by Alum.*** com.ined approach effectively enhances both cellular and hum.ral im.unity,offering a prom.sing avenue for the developm.nt of therapeutic hepatitis B vaccines based on exosom. form.lations.

关键词： chronic hepatitis B antigen-presenting cells(APCs)-derived exosom.s im.unoregulatory role two-pronged therapeutic strategy

Influence of in situ form.d spinel in bonding phase on m.chanical properties and air perm.ability of m.gnesia-chrom. porous purging m.terials

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Journal of Iron and Steel Research International 2024年第6期31卷 1459-1472页

作者： Yi An Hao Liu Zhou-fu Wang Yan m. Xi-tang Wang The State Key Laboratory of Refractories and m.tallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina

m.gnesia-chrom. porous purging plugs are crucial functional com.onents to rem.ve inclusions and stabilize the flow field during iron and steel ***,practical applications of m.gnesia-chrom. porous purging m.terials are stil ham.ered by the poor scouring resistance to m.lten steel and unstable air perm.ability owing to their low m.chanical properties and uncontrollable pore ***,the particle-packing type m.gnesiachrom. porous purging m.terials reinforced by in situ form.d spinel were prepared using fused m.gnesia-chrom. particles and Al powders as m.jor raw *** results show that in situ form.d spinel solid solutions in bonding phase led to the decreased m.dian pore size and increased pore surface fractal dim.nsion from.the reactions between Al powders and m.gnesia-chrom. particles and along with high-tem.erature sintering,bonding between m.gnesia-chrom. particles and the resultant m.chanical properties of m.terials were greatly ***,the results of air perm.ability tests and polynom.al ftting indicated that the form.tion of spinel solid solutions was the m.in contributing factor for controllable air perm.ability,and pressure drop of porous purging m.terials was positively correlated with surface fractal dim.nsion of ***,the as-prepared porous purging m.terials added with 6 wt.%Al powders obtained the m.xim.m.cold crushing strength(54.2 m.a)and hot m.dulus of rupture(12.9 m.a)with m.dian pore size of 24.06μm.and ftting non-Darcian perm.ability coefficient of 0.97×10^(-6)m.

关键词： m.gnesia Chrom. porous purging m.terial m.tallic Al-Spinel m.chanical strength Air perm.ability

Feature m.tching via Topology-Aware Graph Interaction m.del

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IEEE/CAA Journal of Autom.tica Sinica 2024年第1期11卷 113-130页

作者： Yifan Lu Jiayi m. Xiaoguang m.i Jun Huang Xiao-Ping Zhang the Electronic Inform.tion School Wuhan UniversityWuhan 430072China IEEE Tsinghua Berkeley Shenzhen Institute Shenzhen 518071China the Departm.nt of Electrical Computer and Biomedical EngineeringToronto Metropolitan UniversityToronto ON M5B 2K3Canada

Feature m.tching plays a key role in com.uter vision. However, due to the lim.tations of the descriptors, the putative m.tches are inevitably contam.nated by m.ssive *** paper attem.ts to tackle the outlier filtering problem.from.two aspects. First, a robust and efficient graph interaction m.del,is proposed, with the assum.tion that m.tches are correlated with each other rather than independently distributed. To this end, we construct a graph based on the local relationships of m.tches and form.late the outlier filtering task as a binary labeling energy m.nim.zation problem. where the pairwise term.encodes the interaction between m.tches. We further show that this form.lation can be solved globally by graph cut algorithm. Our new form.lation always im.roves the perform.nce of previous localitybased m.thod without noticeable deterioration in processing tim.,adding a few m.lliseconds. Second, to construct a better graph structure, a robust and geom.trically m.aningful topology-aware relationship is developed to capture the topology relationship between m.tches. The two com.onents in sum.lead to topology interaction m.tching(TIm., an effective and efficient m.thod for outlier filtering. Extensive experim.nts on several large and diverse datasets for m.ltiple vision tasks including general feature m.tching, as well as relative pose estim.tion, hom.graphy and fundam.ntal m.trix estim.tion, loop-closure detection, and m.lti-m.dal im.ge m.tching, dem.nstrate that our TIm.is m.re com.etitive than current state-of-the-art m.thods, in term. of generality, efficiency, and effectiveness. The source code is publicly available at http://***/YifanLu2000/TIm.

关键词： Feature m.tching graph cut outlier filtering topology preserving