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Incidence Coloring of Outer-1-planar Graphs

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Acta Mathematicae Applicatae Sinica 2024年第3期40卷 840-848页

作者： meng-ke QI Xin ZHANG School of Mathematics and Statistics Xidian UniversityXi'an 710071China

A graph is outer-1-planar if it can be drawn in the plane so that all vertices lie on the outer-face and each edge crosses at most one another *** is known that every outer-1-planar graph is a planar *** this paper,we conjecture that every planar graph G has a proper incidence(Δ(G)+2)-coloring and confirm it for outer-1-planar graphs with maximum degree at least 8 or with girth at least ***,we prove that every outer-1-planar graph G has an incidence(Δ(G)+3,2)-coloring,and every outer-1-planar graph G with maximum degree at least 8 or with girth at least 4 has an incidence(Δ(G)+2,2)-coloring.

关键词： incidence coloring outer--planar graph planar graph

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新质人才需求背景下学校教育供给变革研究

教学与管理 2025年第1期 15-18页

作者：孟志远李永梅曲阜师范大学教育学院山东曲阜273165

新质生产力的蓬勃发展呼唤新质人才并为其培养提供了重要的时域与场域,面向新质人才需求的学校教育供给变革成为教育的基础性命题。当前面向新质人才需求的学校供给变革存在“传统型”供给主体与“新质型”主体需求、“标准化”供给内... 详细信息

新质生产力的蓬勃发展呼唤新质人才并为其培养提供了重要的时域与场域,面向新质人才需求的学校教育供给变革成为教育的基础性命题。当前面向新质人才需求的学校供给变革存在“传统型”供给主体与“新质型”主体需求、“标准化”供给内容与“个性化”内容需求、“统一性”供给方式与“数智化”方式需求之间的矛盾。鉴于此,提出面向新质人才需求的学校教育供给遵循从“人类教师主体”到“人机智能联合主体”、从“统一与他主内容”到“开放与自主内容”、从“前置性预设方式”到“发展性按需方式”的变革理路,以期为学校教育供给变革与新质人才培养提供一定的理论借鉴和实践启示。

关键词：学校教育供给变革新质人才需求新质生产力新质人才培养

Protective effect of Pai-Nong-San against AOM/DSS-induced CAC in mice through inhibiting the Wnt signaling pathway

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Chinese Journal of Natural Medicines 2021年第12期19卷 912-920页

作者： ZHANG meng-meng YIN Deng-ke RUI Xue-lin SHAO Fu-Ping li Jia-Cheng XU li YANG Ye School of Pharmacy Anhui University of Chinese MedicineHefei 230031China Anhui Provincial key Laboratory for Chinese Medicinal Formula Hefei 230031China Institute of Pharmaceutics Anhui Academy of Chinese MedicineHefei 230021China Anhui Provincial key Laboratory of Research&Development of Chinese Medicine Hefei 230021China

Pai-Nong-San(PNS), a prescription of traditional Chinese medicine, has been used for years to treat abscessation-induced diseases including colitis and colorectal cancer. This study was aimed to investigate the preventive effects and possible protective mechanism of PNS on a colitis-associated colorectal cancer(CAC) mouse model induced by azoxymethane(AOM)/dextran sodium sulfate(DSS). The macroscopic and histopathologic examinations of colon injury and DAI score were observed. The inflammatory indicators of intestinal immunity were determined by immunohistochemistry and immunofluorescence. The high throughput 16S rRNA sequence of gut microbiota in the feces of mice was performed. Western blot was used to investigate the protein expression of the Wnt signaling pathway in colon tissues. PNS improved colon injury, as manifested by the alleviation of hematochezia, decreased DAI score, increased colon length, and reversal of pathological changes. PNS treatment protected against AOM/DSS-induced colon inflammation by regulating the expression of CD4;and CD8;T cells, inhibiting the production of HIF-α, IL-6, and TNF-α, and promoting the expression of IL-4 and IFN-γ in colon tissues. Meanwhile, PNS improved the components of gut microbiota, as measured by the adjusted levels of Firmicutes, Bacteroidetes, Proteobacteria, and Lactobacillus. PNS down-regulated the protein expression of pGSK-3β, β-catenin, and c-Myc, while up-regulating the GSK-3β and p-β-catenin in colon tissues of CAC mice. In conclusion, our results suggested that PNS exhibits protective effect on AOM/DSS-induced colon injury and alleviates the development of CAC through suppressing inflammation, improving gut microbiota, and inhibiting the Wnt signaling pathway.

关键词： Pai-Nong-San CAC AOM-DSS Gut microbiota Wnt signaling pathway

Charging-rate-based Battery Energy Storage System in Wind Farm and Battery Storage Cooperation Bidding Problem

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CSEE Journal of Power and Energy Systems 2022年第3期8卷 659-668页

作者： Zihang Qiu Wang Zhang Shuai Lu Chaojie li Jingbo Wang ke meng Zhaoyang Dong School of Electrical Engineering and Telecommunications UNSWSydneyNew South Wales2032Australia School of Electrical Engineering Southeast UniversityNanjing210096China School of Automation Nanjing University of Science and TechnologyNanjing210000China UNSW Digital Grid Futures Institute SydneyNew South Wales1466Australia

Wind power has been proven to have the ability to participate in the frequency modulation(FM)*** batteries to improve wind power stability can better aid wind farms participating in the FM *** energy storage system(BESS)has a promising future in applying regulation and load management in the power *** regulation services,normally,the regulation power prediction is estimated based on the required maximum regulation capacity;the power needed for the specific regulation service is unknown to the BESS ***,this information is needed in the regulation model when formulating the linearised BESS model with a constraint on the state of charge(SoC).This compromises the accuracy of the model greatly when it is applied for regulation ***,different control strategies can be employed by ***,the current depth of discharge(DoD)based models have difficulties in being used in a linearization *** to the consideration of the control strategy,the model becomes highly nonlinear and cannot be *** this paper,a charging rate(C-rate)based model is introduced,which can consider different control strategies of a BESS for cooperation with wind farms to participate in wind farm estimation error compensation,load management,energy bid,and regulation ***,the limitation of conventional BESS models are listed,and a new C-rate-based model is *** the C-rate-based BESS model is adopted in a wind farm and BESS cooperation ***,experimental studies are carried out,and the DoD model and C-rate model optimization results are compared to prove the rationality of the C-rate model.

关键词： C-rate based battery energy storage system model wind farm estimation error compensation

Synergistic Effects of Carbon Nanotube(CNT)and Reduced Graphene Oxide(RGO)on Mechanical and Thermal Properties of ZK61 Alloy

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Acta Metallurgica Sinica(English Letters) 2024年第3期37卷 577-585页

作者： Fanjing meng Wenbo Du Ning Ding Jian Sun Xian Du ke liu Shubo li College of Materials Science and Engineering Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China

The hybrid of carbon nanotube(CNT)and reduced graphene oxide(RGO)reinforced ZK61 composite was fabricated by a hot extrusion *** with the raw ZK61 alloy and single-reinforced composites,the hybrid-reinforced by RGO+CNT complex exhibited significant enhancements both in mechanical and thermal *** adjusting the proportion of RGO and CNT in ZK61 alloy,the obtained optimum ZK61/(0.06 wt%RGO+0.54 wt%CNT)composite exhibited increase of 25.4%in yield strength,26.5%in ultimate tensile strength,104%in failure strain and 30.4%in thermal conductivity,respectively,in comparison with ZK61 *** superior properties of the nano-hybrid composite are attributed to the synergetic effects of RGO and CNT,leading to a uniform dispersion and integrated structure as well as the enhanced interfacial bonding with *** strengthening ability of RGO and CNT was calculated to quantify their individual contribution to the improvement in mechanical and thermal properties of the ZK61 matrix *** RGO+CNT hybrids provide a promising way to develop Mg matrix composites with impressive performances.

关键词： Mg matrix composite Carbon nanotube Reduced graphene oxide Mechanical performance Thermal conductivity

Enhancing photocatalytic hydrogen peroxide production of Tibased metal-organic frameworks:The leading role of facet engineering

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Nano Research 2022年第7期15卷 6045-6053页

作者： Xue-Yang Ji Yao-Yao Wang Yun li ke Sun meng Yu Jun Tao key Laboratory of Cluster Science of Ministry of Education School of Chemistry and Chemical EngineeringLiangxiang CampusBeijing Institute of TechnologyBeijing 102488China

Rational construction of the facet engineering over metal-organic frameworks is of significant interest for enhancing photocatalytic performance,yet the role of modulator except regulating facet is largely ***,facet engineering of NH_(2)-MIL125(aMIL)was achieved through the facile one-pot method by controlling the concentration of acetic acid *** probable domino effects induced with the detectable modulator were extensively investigated,evidencing the multi-position in one mode contained powder X-Ray diffraction(PXRD),scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),and X-ray absorption spectroscopy(XAS),***,correlation among the{111}facets engineering,the degree of structural defects,and the performance of photocatalytic hydrogen peroxide(H_(2)O_(2))production was studied in detail,revealing that facet and defect engineering respectively play positive and relatively negative roles in the photocatalytic oxygen reduction reaction(ORR)with a volcano-type ***-3 photocatalyst could deliver H_(2)O_(2) production rate of 925.8μmol·h^(−1)·g^(−1)(2.03-fold of aMIL)under visible-light irradiation and a quantum yield of 1.08%at 420 nm.

关键词： metal-organic frameworks facet engineering defects photocatalyst hydrogen peroxide production

Integrated transcriptomics and metabolomics analyses provide insights into cold stress response in wheat

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The Crop Journal 2019年第6期7卷 857-866页

作者： Yong Zhao meng Zhou ke Xu Jiahao li Shanshan li Shuhua Zhang Xueju Yang Huabei key Laboratory of Crop Germplasm Hebei Agricultural UniversityBaoding 071000HebeiChina College of life Sciences Hebei UniversityBaoding 071000HebeiChina

Cold tolerance of crop plants influences survival and productivity under low-temperature conditions. Elucidation of molecular mechanisms underlying low temperature tolerance could be helpful in breeding. In this study, we used integrated transcriptomics and metabolomics analyses to investigate changes in gene/metabolite activity in a winter-hardy wheat cultivar of(cv. Jing 411) when subjected to sold stress. The 223 metabolites mainly enriched during cold acclimation included carbohydrates, flavonoids, and amino *** common metabolites had altered abundance following freezing treatment;six increased and two decreased. Transcriptome analysis revealed that 29,066 genes were differentially expressed in wheat crowns after cold acclimation compared to the nonacclimated control. Among them, 745 genes were up-regulated following freezing treatment, suggesting substantial change in expression of a large quantity of genes upon cold acclimation and freezing treatment, which impacts on the modified *** analysis of gene expression and metabolite profiles revealed that the abscisic acid(ABA)/jasmonic acid(JA) phytohormone signaling and proline biosynthesis pathways were significantly modulated under cold acclimation and freezing treatments. Our results indicated that low-temperature stress induced substantial changes in both transcriptomes and metabolomes. Critical pathways associated with ABA/JA signaling and proline biosynthesis played important roles in regulating cold tolerance in wheat.

关键词： Cold tolerance Transcriptome Metabolome Abscisic acid Jasmonic acid Signaling pathways

Axial enantiomers with donor-regulated TADF feature for multicolor circularly polarized electroluminescence

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Science China Chemistry 2024年第6期67卷 2039-2045页

作者： Chen-Hao Guo Wen-Long Zhao ke-ke Tan Wei-Chen Guo liheng Feng Chuan-Feng Chen meng li School of Chemistry and Chemical Engineering Shanxi UniversityTaiyuan030006China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China

This study optimized the TADF feature of axial chiral enantiomers through precise donor engineering,and multicolor CP-TADFwas achieved in the axial chiral *** pairs of axial enantiomers with donor-regulated TADF feature,namely(R/S)-TPCBD,(R/S)-DPCBD,and(R/S)-DPACBD,were synthesized by introducing carbazole donors with different substituents onto biphenyl cyanide *** the electron-donating ability of donors increases,the emission of these axial enantiomers ranges from 455,476 to 552 nm,their singlet-triplet energy gaps(ΔE_(ST))gradually decrease from 0.30,0.22 to 0.02 e V,accompanied by an increasement in the transition rate(k_(RISC))of RISC process,and the k_(RISC)of DPACBD could reach up to 7.16×10^(5)s^(-1).These axial enantiomers also exhibit mirror-image CD and circularly polarized luminescence(CPL)***,OLEDs based on TPCBD,DPCBD,and DPACBD as emitter were then fabricated,which displayed blue,green,and orange electroluminescence with EQE_(max)of 13.0%,16.4%,and 25.0%,*** results also exhibited a phenomenon of device efficiency increasing with the enhancement of donor ***,the CP-OLEDs using(R/S)-TPCBD,(R/S)-DPCBD and(R/S)-DPACBD as emitters displayed intense CPEL signals with g_(EL)values of 3.4×10^(-3)/-4.1×10^(-3),3.2×10^(-3)/-3.1×10^(-3)and2.3×10^(-3)/-2.1×10^(-3),*** convenient molecular engineering of donor regulation in the same molecular skeleton,CP-TADF materials with multicolor CPEL and improved device performance could be conveniently achieved.

关键词： axial chirality thermally activated delayed fluorescence circularly polarized luminescence electroluminescence organic light-emitting diodes

Honeycomb-patterned films of polystyrene/poly(ethylene glycol): Preparation, surface aggregation and protein adsorption

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Science China Chemistry 2009年第7期52卷 969-974页

作者： WAN lingShu ke BeiBei li XiaoKai meng Xianglin ZHANG LuYao XU ZhiKang key Laboratory of Macromolecular Synthesis and Functionalization of Ministry of Education Institute of Polymer Science and State Key Laboratory of Chemical EngineeringZhejiang UniversityHangzhou 310027China

Highly ordered honeycomb-patterned polystyrene (PS)/poly(ethylene glycol) (PEG) films were prepared by a water-assisted method using an improved setup, which facilitated the formation of films with higher regularity, better reproducibility, and larger area of honeycomb structures. Surface aggregation of hydrophilic PEG and adsorption of bovine serum albumin (BSA) on the honeycomb-patterned films were investigated. Field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM) were used to observe the surface morphologies of the films before and after being rinsed with water. As confirmed by the FESEM images and the AFM phase images, PEG was enriched in the pores and could be gradually removed by water. The adsorption of fluorescence-labeled BSA on the films was studied in visual form using laser scanning confocal microscopy. Results clearly demonstrated that the protein-resistant PEG was selectively enriched in the pores. This water-assisted method may be a latent tool to prepare honeycomb-patterned biofunctional surfaces.

关键词： honeycomb-patterned film water-assisted method polystyrene poly(ethylene glycol) surface aggregation