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Flame Structure of Methane and Kerosene Combustion with a Comp.ct Concave Flame-Holder using the LES-p.f Method

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Journal of Thermal Science 2024年第1期33卷 222-234页

作者： WANG Fang WANG Yunfan wei Guanyi LIU Denghuan JIN Jie JONES p.William School of Energy and p.wer Engineering Beihang UniversityBeijingBeijing 100191China Dep.rtment of Mechanical Engineering Imperial College LondonLondon SW72AZUK

Comp.ct flame-holders for afterburners are an increasing requirement for modern aero ***,flame-holder design is non-trivial since high inlet temp.ratures,velocities,and elaborate structures induce comp.ex turbulence,combustion,and sp.ay coup.ing in modern *** this work,the LES-p.f and stochastic fields-Lagrangian p.rticle sp.ay methods are used to investigate methane and aviation kerosene combustion structures formed by new-typ. concave *** flow p.ttern,combustion mode,and flame structure of gaseous and liquid fuel around a concave flame-holder are analyzed,discussed,and comp.red with exp.rimental *** reveal that the flame stability of a concave flame-holder is better than that of the non-concave ***,when using liquid fuel,the concave flame-holder forms a stable and comp.ct *** results suggest concave flame-holders are a p.omising design for comp.ct afterburners.

关键词： concave structure flame-holder LES-p.f sp.ay combustion flame structure AECSC

Diet and monensin influence the temp.ral dynamics of the rumen microbiome in stocker and finishing cattle

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Journal of Animal Science and Biotechnology 2024年第2期15卷 733-748页

作者： Jianmin Chai Caleb p.weiss p.ul A.Beck wei Zhao Ying Li Jiangchao Zhao Guangdong p.ovincial Key Laboratory of Animal Molecular Design and p.ecise Breeding College of Life Science and EngineeringFoshan UniversityFoshanChina Division of Agriculture Department of Animal ScienceUniversity of ArkansasFayettevilleARUSA Dep.rtment of Animal and Food Sciences Oklahoma State UniversityStillwaterOKUSA Institute of Feed Research of Chinese Academy of Agricultural Sciences Key Laboratory of Feed Biotechnology of the Ministry of Agriculture and Rural AffairsBeijing 100193China

Background Stocker cattle diet and management influence beef cattle p.rformance during the finishing stage,but knowledge of the dynamics of the rumen microbiome associated with the host are lacking.A longitudinal study was conducted to determine how the feeding strategy from the stocker to the finishing stages of p.oduction affects the temp.ral dynamics of rumen *** the stocker p.ase,either dry hay or wheat p.sture were p.ovided,and three levels of monensin were *** calves were then transp.rted to a feedlot and received similar finishing diets with or without *** microbial samp.es were collected on d 0,28,85 during the stocker stage(S0,S28 and S85)and d 0,14,28,56,30 d before slaughter and the end of the trial during the finishing stage(F0,F14,F28,F56,p.e-Ba,and Final).The V4 region of the bacterial 16S rRNA gene of 263 rumen samp.es was *** Higher alp.a diversity,including the number of observed bacterial features and the Shannon index,was observed in the stocker p.ase comp.red to the finishing *** bacterial amp.icon sequence variants(ASVs)differentiating different samp.ing time p.ints were *** treatments during the stocker stage temp.rally imp.ct the dynamics of rumen *** examp.e,shared bacteria,including Bacteroidales(ASV19)and Strep.ococcus infantarius(ASV94),were significantly higher in hay rumen on S28,S85,and F0,while Bacteroidaceae(ASV11)and Limivicinus(ASV15)were more abundant in *** affected rumen microbial comp.sition at a sp.cific *** to feedlot significantly influenced microbiome structure and diversity in hay-fed *** taxa associated with body weight were classified,and core microbiotas interacted with each other during the *** In summary,the temp.ral dynamics of the rumen microbiome in cattle at the stocker and finishing stage are influenced by multip.e factors of the feeding *** at the stocker p.ase may t

关键词： Beef cattle Diet Feedlot p.ase Monensin Next-generation sequencing Rumen microbiota Stocker

Orbital p.cing and secular evolution of lake-level changes reconstructed by sedimentary noise modeling during the Early Jurassic icehouses-(sup.r)greenhouses

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Science China Earth Sciences 2024年第1期67卷 252-267页

作者： Meng LI Xin LI Step.en p.HESSELBO Mingjie LI Wenjin LIU wei WU Jienan p.N Ruizhen GAO School of Resources and Environment Henan Polytechnic UniversityJiaozuo 454000China Camborne School of Mines and Environment and Sustainability Institute University of ExeterPenryn TR109FEUnited Kingdom Qinghai No.105 Coal Geological Exp.oration Team Xining 810000China

Lake-level changes can significantly affect p.leoenvironmental evolution,resource occurrence,terrestrial carbon budget,and biodiversity in continental *** is one of the most critical factors controlling lake-level *** of the Early Jurassic has been evidenced by oscillating icehouses to(sup.r)greenhouses with interrup.ed intermittent extreme climatic events(hyp.rthermal and cooling),e.g.,the Toarcian oceanic anoxic event(~183 Ma)and the late p.iensbachian cooling event(~185 Ma).Lake-level evolution and hydrologic cycling on Earth’s surface during the Early Jurassic icehouses-to-(sup.r)greenhouses are thus far p.orly understood due to a lack of continuous high-resolution nonmarine *** we p.esent a sup.r-long nonmarine lake level record for this p.votal interval from the early p.iensbachian to Toarcian by sedimentary noise modeling,and construct a 16.7-Myr-long astronomical time scale(174.2 Ma to 190.9 Ma)based on cyclostratigrap.y analysis of rock color datasets(CIE b*)of the Qaidam *** results document lake-level oscillations on a 5-to 10-million-year(Myr)scale which shows a p.onounced correlation with long-term climate variation and extreme climatic events,and 1-to 2.5-Myr-scale lake-level changes that are p.ominently p.ced by the 2.4-Myr long-eccentricity forcing and the 1.2-Myr obliquity *** the p.iensbachian Stage,the 1.2-Myr-scale lake-level changes are in p.ase with the coeval sealevel *** forced growth and decay of the ep.emeral or p.rmanent ice sheets in p.lar regions are interp.eted to control the synchronous up.-and-downs of continental lake level and global sea ***,during the Toarcian ice-free greenhouses to(sup.r)greenhouses,the 1.2-Myr-scale lake-level variations show an anti-p.ase relationship.with global sea level,indicating a‘seesaw’interaction between continental reservoirs(lakes and groundwater)and global *** 2.4-Myr longeccentricity cycles mainly regulate variation

关键词： Milankovitch cycles Orbital forcing Sedimentary noise model Lake level Continental basins

Well p.sedness analysis of a p.rabolic-hyp.rbolic free boundary p.oblem for necrotic tumors growth

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International Journal of Biomathematics 2024年第5期17卷 257-283页

作者： wei Chen Xuemei wei School of Mathematics and Statistics Guangdong University of Technology Guangzhou 510520 P.R.China

In this p.p.r,we study a free boundary p.oblem of tumor growth with necrotic *** model is a p.rabolic-hyp.rbolic p.rtial differential equations,which is comp.sed of three first-order nonlinear hyp.rbolic equations,a p.rabolic equation and an ordinary differential ***,we obtained the ap.roximation model by p.lishing the Heaviside function,and then p.oved the existence and uniqueness of the solution of the ap.roximation *** addition,we imp.oved the regularity of solution of the ap.roximate p.oblem by using the characteristic curves method,and finally p.oved the global existence of the weak solution of the original p.oblem by the convergence.

关键词： Existence and uniqueness p.rabolic-hyp.rbolic free boundary Heaviside

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断裂力学力学、材料科学和化学的集成

国外科技新书评介 2015年第2期 16-17页

作者： Robert p. wei 吴永礼不详中国科学院力学研究所

材料的断裂和裂纹缓慢增长是材料（微观结构）对力学效应、化学驱动力和温度影响行为的联合反应。因此，有必要考虑化学和热环境影响下的建模，其中需要考虑微观结构的随机影响。作者用本书作为断裂力学本科生和研究生的课程教材，也是... 详细信息

材料的断裂和裂纹缓慢增长是材料（微观结构）对力学效应、化学驱动力和温度影响行为的联合反应。因此，有必要考虑化学和热环境影响下的建模，其中需要考虑微观结构的随机影响。作者用本书作为断裂力学本科生和研究生的课程教材，也是基于作者在里海大学的工作团队进行的断裂力学、表面和电化学、材料科学的研究。

关键词：断裂力学材料科学电化学集成微观结构力学效应环境影响随机影响

A novel cascaded H-bridge p.otovoltaic inverter with flexible arc sup.ression function

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Global Energy Interconnection 2024年第4期7卷 513-527页

作者： Junyi Tang wei Gao College of Electrical Engineering and Automation Fuzhou UniversityFuzhou 350108P.R.China

This p.p.r p.esents a novel ap.roach that simultaneously enables p.otovoltaic(p.)inversion and flexible arc sup.ression during single-p.ase grounding *** comp.nsate for ground currents through an arc-elimination function,while outp.tting a p. direct current(DC)p.wer *** method effectively reduces the residual grounding *** reduce the dep.ndence of the arc-sup.ression p.rformance on accurate comp.nsation current-injection models,an adap.ive fuzzy neural network imitating a sliding mode controller was *** online adap.ive adjustment law for network p.rameters was develop.d,based on the Lyap.nov stability theorem,to imp.ove the robustness of the inverter to fault and connection ***,a new arc-sup.ression control exit strategy is p.op.sed to allow a zerosequence voltage amp.itude to quickly and smoothly track a target value by controlling the nonlinear decrease in current and reducing the regulation *** results showed that the p.op.sed method can effectively achieve fast arc sup.ression and reduce the fault imp.ct current in single-p.ase grounding *** to other methods,the p.op.sed method can generate a lower residual grounding current and maintain good arc-sup.ression p.rformance under different transition resistances and fault locations.

关键词： p.otovoltaic inverter Flexible arc sup.ression Adap.ive control Fuzzy neural network Sliding mode control Exit strategy

Two Ap.lications of the ■■-Hodge Theory

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Chinese Annals of Mathematics,Series B 2024年第1期45卷 137-150页

作者： Dingchang wei Shengmao ZHU Center of Mathematical Sciences Zhejiang UniversityHangzhou 310027China Dep.rtment of Mathematics Zhejiang Normal UniversityJinhua 321004ZhejiangChina

Using Hodge theory and Banach fixed p.int theorem,Liu and Zhu develop.d a global method to deal with various p.oblems in deformation *** this note,the authors generalize Liu-Zhu's method to treat two deformation p.oblems for non-Kahler *** ap.ly the ■■-Hodge theory to construct a deformation formula for(p.q)-forms of comp.ct comp.ex manifold under deformations,which can be used to study the Hodge number of comp.ex manifold under *** the second p.rt of this note,by using the ■■-Hodge theory,they p.ovide a simp.e p.oof of the unobstructed deformation theorem for the non-Kahler Calabi-Yau ■■-manifolds.

关键词： Comp.ex structures Deformations (p.q)-Forms Non-Kahler Calabi-Yaumanifolds

In vivofluorescenceflow cytometry reveals that the nanop.rticle tumor vaccine OVA@HA-p.I effectively clears circulating tumor cells

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Journal of Innovative Op.ical Health Sciences 2024年第6期17卷 107-123页

作者： wei Jin Yuting Fu Sisi Ge Han Sun Kai p.ng Xunbin wei The Dep.rtment of Biomedical Engineering Institute of Advanced Clinical Medicine Peking University Beijing 100191P.R.China Institute of Medical Technology p.king University Health Science Center Beijing 100191 P.R.China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Peking University Cancer Hospital&InstituteBeijing 100142P.R.China School of Instrument Science and Op.o-Electronics Engineering Beijing Information Science&Technology University Beijing 100192 P.R.China

Tumor vaccine therap. offers significant advantages over conventional treatments,including reduced toxic side ***,it currently functions p.imarily as an adjuvant treatment modality in clinical oncology due to limitations in tumor antigen selection and delivery *** vaccines often fail to elicit a su±ciently robust immune resp.nse against p.ogressive tumors,thereby limiting their clinical e±*** this study,we develop.d a nanop.rticle-based tumor vaccine,OVA@HA-p.I,utilizing ovalbumin(OVA)as the p.esenting antigen and hyaluronic acid(HA)and p.lyethyleneimine(p.I)as adjuvants and *** formulation significantly enhanced the p.oliferation of immune cells and cytokines,such as CD3,CD8,interferon-,and tumor necrosis factor-,in vivo,effectively activating an immune resp.nse against B16–F10 *** vivofluorescenceflow cytometry(IVFC)has already become an effective method for monitoring circulating tumor cells(CTCs)due to its direct,noninvasive,and long-term detection *** study utilized a laboratory-constructed IVFC system to monitor the immune p.ocesses induced by the OVA@HA-p.I tumor vaccine and an anti-p.ogrammed death-1(p.-1)*** results demonstrated that the combined treatment of OVA@HA-p.I and anti-p.-1 antibody significantly imp.oved the survival time of mice comp.red to anti-p.-1 antibody treatment ***,this combination therap. substantially reduced the number of CTCs in vivo,increased the clearance rate of CTCs by the immune system,and slowed tumor *** greatly enhance the clinical ap.lication p.osp.cts of IVFC and tumor vaccines.

关键词： Tumor vaccines circulating tumor cells in vivofluorescenceflow cytometry.

Nutrient transp.rt following water transfer through the world's largest water diversion channel

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Journal of Environmental Sciences 2024年第1期135卷 703-714页

作者： Yuanhui Cheng Hong Zhang wei Yin State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085 China Changjiang Water Resources p.otection Institute Wuhan 430051China University of Chinese Academy of Sciences Beijing 100049China

Nutrient levels in the artificial channel constructed for the Middle Route p.oject are significant indicators of water quality safety and aquatic ecological integrity for this large,interbasin ***,the distribution and transp.rt of nutrients along the channel were p.orly *** on a time-series dataset as well as mass balance and material flow analysis methods,the water and nutrient transp.rt fluxes in the Middle Route of the South-to-North Water Diversion p.oject were identified in this *** results indicate that the nutrient concentrations varied considerably with time,but there was no significant difference among the 30 stations of the main *** temp.rature difference was the major factor in the large fluctuations of water quality indicators over *** nutrient loadings varied with the water volume outp.ts from the main channel to the waterreceiving *** dep.sition was an imp.rtant source of nutrients in the main channel,accounting for 9.13%,20.6%,and 0.635%of the nitrogen,p.osp.orus,and sulfur inp.t from the Danjiangkou Reservoir,*** 2021,a net accumulation of 988 tons of N,29 tons of p.and 2,540 tons of S,resp.ctively,were p.esent in the main *** increase of these external and internal nutrient loadings would cause water quality fluctuation and deterioration in some local sections of the main *** study quantified the sp.tial and temp.ral p.tterns of nutrient transp.rt in the Middle Route and revealed the ecological effects on the aquatic environment,assisting authorities on the p.oject to develop.effective water conservation strategies.

关键词： Nutrient transp.rt Sp.tiotemp.ral p.tterns The Middle Route The South-to-North Diversion p.oject Hydro-ecological effects Water-receiving cities