The oral ecosystem(OE)is a critical yet underexplored interface where food components interact with host physiology to shape flavor perception.This comprehensive review summarizes current knowledge on OE-flavor intera...The oral ecosystem(OE)is a critical yet underexplored interface where food components interact with host physiology to shape flavor perception.This comprehensive review summarizes current knowledge on OE-flavor interactions through a hierarchical framework:1)oral secretion-mediated flavor release and modification;2)microbiota-driven flavor biotransformation;and 3)dynamic feedback loops between oral secretion and oral microbiota.We further critically evaluate emerging strategies for precision OE modulation,focusing on natural bioactives that target specific microbial guilds.Furthermore,we propose additional efforts in integrating multi-omics profiling with machine learning algorithms for data-driven personalized OE modulation.This work provides actionable insights into OE-tailored strategies in developing future foods with enhanced sensory experiences.展开更多
Achieving industrial-level electrochemical CO_(2)reduction to formate remains a significant challenge due to limitations in catalyst selectivity and interfacial proton management at high current densities.In a recent ...Achieving industrial-level electrochemical CO_(2)reduction to formate remains a significant challenge due to limitations in catalyst selectivity and interfacial proton management at high current densities.In a recent study,Prof.Guo and colleagues report the development of Turingstructured electrocatalysts,which incorporate reaction-diffusion-inspired topologies to engineer mesoscale surface patterns.This design enables precise modulation of the interfacial microenvironment,enhancing CO_(2)activation and suppressing competing hydrogen evolution.The resulting catalysts achieve efficient and stable CO_(2)-to-formate conversion under industrially relevant conditions,offering a promising strategy for scalable carbon-neutral chemical production.展开更多
To achieve high power rating and low current harmonics of motor drive,this paper develops a dual three-phase open-winding permanent magnet synchronous motor(DTP-OW-PMSM)drive with the DC-link voltage ratio of 2:1:1.Ba...To achieve high power rating and low current harmonics of motor drive,this paper develops a dual three-phase open-winding permanent magnet synchronous motor(DTP-OW-PMSM)drive with the DC-link voltage ratio of 2:1:1.Based on this topology,this paper proposes a DTP four-level space vector pulse width modulation(DTP-FL SVPWM)strategy.First,two identical three-phase four-level space vector diagrams are constructed and divided.Then,three adjacent vectors nearest to the reference vector in each diagram are selected for the vector synthesis to guarantee high modulation precision and low switching frequency.Furthermore,to avoid the modulation error caused by the voltage deviation,the proposed DTP-FL SVPWM strategy is further optimized through unified duty ratio compensation(UDRC).The effectiveness of the proposed strategy is verified through experiments.展开更多
Element doping can break the crystal symmetry and realize the topological phase transition in quantum materials,which enables the precise modulation of energy band structure and microscopic dynamical interaction.Herei...Element doping can break the crystal symmetry and realize the topological phase transition in quantum materials,which enables the precise modulation of energy band structure and microscopic dynamical interaction.Herein,we have studied the ultrafast photocarrier dynamics in Zn-doped 3D topological Dirac semimetal Cd_(3)As_(2)utilizing time-resolved optical pump-terahertz probe spectroscopy.Comparing to the pristine Cd_(3)As_(2),we found that the relaxation time of the lightly doped alloy is slightly shorter,while that of the heavily doped alloy exhibits a significant prolongation.Pump-fluence-and temperature-dependent transient terahertz spectroscopy indicated that in pristine and lightly doped samples within nontrivial semimetal phase,the photocarrier dynamics are dominated by the cooling of Dirac fermions.In heavily doped alloy,however,the observed longer relaxation process can be attributed to interband electron-hole recombination,which is a result of doping-induced transition into a trivial semiconductor phase.Our investigation highlights that Zn-doping is an effective and flexible scheme for engineering the electronic structure and transient carrier relaxation dynamics in Cd_(3)As_(2),and offers a control knob for functional switching between diverse optoelectronic devices within the realm of practical applications.展开更多
基金financially supported by the National Natural Science Foundation of China(32302265).
文摘The oral ecosystem(OE)is a critical yet underexplored interface where food components interact with host physiology to shape flavor perception.This comprehensive review summarizes current knowledge on OE-flavor interactions through a hierarchical framework:1)oral secretion-mediated flavor release and modification;2)microbiota-driven flavor biotransformation;and 3)dynamic feedback loops between oral secretion and oral microbiota.We further critically evaluate emerging strategies for precision OE modulation,focusing on natural bioactives that target specific microbial guilds.Furthermore,we propose additional efforts in integrating multi-omics profiling with machine learning algorithms for data-driven personalized OE modulation.This work provides actionable insights into OE-tailored strategies in developing future foods with enhanced sensory experiences.
基金financially supported by the National Natural Science Foundation of China(No.22209024)Tongcheng R&D Foundation(No.CPCIF-RA-0102)the State Key Laboratory of Advanced Fiber Materials,Donghua University
文摘Achieving industrial-level electrochemical CO_(2)reduction to formate remains a significant challenge due to limitations in catalyst selectivity and interfacial proton management at high current densities.In a recent study,Prof.Guo and colleagues report the development of Turingstructured electrocatalysts,which incorporate reaction-diffusion-inspired topologies to engineer mesoscale surface patterns.This design enables precise modulation of the interfacial microenvironment,enhancing CO_(2)activation and suppressing competing hydrogen evolution.The resulting catalysts achieve efficient and stable CO_(2)-to-formate conversion under industrially relevant conditions,offering a promising strategy for scalable carbon-neutral chemical production.
基金supported in part by the National Natural Science Foundation of China under Grant 62303333in part by the Project of Hetao Shenzhen-Hong Kong Science and Technology Innovation Cooperation Zone under Grant HZQB-KCZYB-2020083.
文摘To achieve high power rating and low current harmonics of motor drive,this paper develops a dual three-phase open-winding permanent magnet synchronous motor(DTP-OW-PMSM)drive with the DC-link voltage ratio of 2:1:1.Based on this topology,this paper proposes a DTP four-level space vector pulse width modulation(DTP-FL SVPWM)strategy.First,two identical three-phase four-level space vector diagrams are constructed and divided.Then,three adjacent vectors nearest to the reference vector in each diagram are selected for the vector synthesis to guarantee high modulation precision and low switching frequency.Furthermore,to avoid the modulation error caused by the voltage deviation,the proposed DTP-FL SVPWM strategy is further optimized through unified duty ratio compensation(UDRC).The effectiveness of the proposed strategy is verified through experiments.
基金National Natural Science Foundation of China(12404396,92150101,52225207,52350001)China Postdoctoral Science Foundation(2024M751932)Postdoctoral Fellowship Program of CPSF(GZB20240418)。
文摘Element doping can break the crystal symmetry and realize the topological phase transition in quantum materials,which enables the precise modulation of energy band structure and microscopic dynamical interaction.Herein,we have studied the ultrafast photocarrier dynamics in Zn-doped 3D topological Dirac semimetal Cd_(3)As_(2)utilizing time-resolved optical pump-terahertz probe spectroscopy.Comparing to the pristine Cd_(3)As_(2),we found that the relaxation time of the lightly doped alloy is slightly shorter,while that of the heavily doped alloy exhibits a significant prolongation.Pump-fluence-and temperature-dependent transient terahertz spectroscopy indicated that in pristine and lightly doped samples within nontrivial semimetal phase,the photocarrier dynamics are dominated by the cooling of Dirac fermions.In heavily doped alloy,however,the observed longer relaxation process can be attributed to interband electron-hole recombination,which is a result of doping-induced transition into a trivial semiconductor phase.Our investigation highlights that Zn-doping is an effective and flexible scheme for engineering the electronic structure and transient carrier relaxation dynamics in Cd_(3)As_(2),and offers a control knob for functional switching between diverse optoelectronic devices within the realm of practical applications.
