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Frontiers of Chemical Science and Engineering 2022年第9期16卷 1367-1376页

作者： Cai-Yue Wang Meng-Qi Gao Cheng-Cai zhao li-min zhao Hui zhao School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000China

The exploration of efficient bifunctional electrocatalysts for oxygen reduction reaction and oxygen evolution reaction is pivotal for the development of rechargeable metal–air *** metal phosphides are emerging as promising catalyst candidates because of their superb activity and low ***,a novel metal phosphonate-derived cobalt/nickel phosphide@N-doped carbon hybrid was developed by a carbothermal reduction of cobalt/nickel phosphonate hybrids with different Co/Ni molar *** metal phosphonate derivation method achieved an intimately coupled interaction between metal phosphides and a heteroatom-doped carbon *** resultant Co_(2)P/Ni_(3)P@NC-0.2 enables an impressive electrocatalytic oxygen reduction reaction activity,comparable with those of state-of-the-art Pt/C catalysts in terms of onset potential(0.88 V),4e‒selectivity,methanol tolerance,and long-term ***,remarkable oxygen evolution reaction activity was also observed in alkaline *** high activity is ascribed to the N-doping,abundant accessible catalytic active sites,and the synergistic effect among the *** work not only describes a highefficiency electrocatalyst for both oxygen reduction reaction and oxygen evolution reaction,but also highlights the application of metal phosphonate hybrids in fabricating metal phosphides with tunable structures,which is of great significance in the energy conversion field.

关键词： metal phosphonate cobalt/nickel phosphide N-doped carbon oxygen electrochemistry Zn−air battery

Cobalt nanoparticle decorated N-doped carbons derived from a cobalt covalent organic framework for oxygen electrochemistry

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Frontiers of Chemical Science and Engineering 2021年第6期15卷 1550-1560页

作者： Rui-Qi Zhang Ang Ma Xiang liang li-min zhao Hui zhao Zhong-Yong Yuan School of Materials Science and Engineering Liaocheng UniversityLiaocheng252000China Key Laboratory of Advanced Energy Materials Chemistry(ministry of Education) School of Materials Science and EngineeringNankai UniversityTianjin3000350China

The low cost and highly efficient construction of electrocatalysts has attracted significant attention owing to the use of clean and sustainable energy *** this work,cobalt nanoparticle decorated N-doped carbons(Co@NC)are synthesized by the pyrolysis of a cobalt covalent organic framework under an inert *** Co@NC demonstrates improved electrocatalytic capabilities compared to N-doped carbon without the addition of Co nanoparticles,indicating the important role of *** well-dispersed active sites(Co-Nx)and the synergistic effect between the carbon matrix and Co nanoparticles greatly enhance the electrocatalytic activity for the oxygen reduction *** addition,the Co content has a significant effect on the catalytic *** resulting Co@NC-0.86 exhibits a superb electrocatalytic activity for the oxygen reduction reaction in an alkaline electrolyte in terms of the onset potential(0.90 V),half-wave potential(0.80 V)and the limiting current density(4.84 mA·cm^(−2)),and a high selectivity,as well as a strong methanol tolerance and superior durability,these results are comparable to those of the Pt/C ***,the superior bifunctional activity of Co@NC-0.86 was also confirmed in a home-built Zn-air battery,signifying the possibility for application in electrode materials and in current energy conversion and storage devices.

关键词： cobalt embedment N-doped carbons covalent organic framework oxygen reduction Zn-air battery

Synthesis and characterization of CePO_4 nanowires via microemulsion method at room temperature

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Chinese Chemical Letters 2009年第7期20卷 857-860页

作者： Yi Bin Yin Xin Shao li min zhao Wen Zhi li College of Materials Science and Engineering Liaocheng University Liaocheng 252059 China Renewable Energy & Eco-Materials Engineering Center Liaocheng University Liaocheng 252059 China

Uniform CeVO4 nanowires with diameter of about 25 nm were synthesized by the water-in-oil microemulsion method at room temperature from cerous chloride, sodium orthophosphate, sodium chloride, cyclohexane, Triton X-100 and cetyltrimethyl ammonium bromide （CTAB）. The crystal structure and morphology of the nanowires were characterized by XRD and TEM, respectively. The UV-vis absorption was detected by UV-vis spectrophotometer techniques. The results showed that as-prepared nanowires with the hexagonal phase have obvious quantum confinement effect and semiconductor characteristics. little sodium chloride could play a positive role on the formation of CePO4 nanowires at room temperature. The size of the nanowires can be controlled through the joining of sodium chloride. C 2009 Yi Bin Yin. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Nanowires Cerium phosphate Microemulsion Room temperature

Fabrication of triple-shelled hollow spheres with optical properties via RAFT polymerization

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Chinese Chemical Letters 2010年第7期21卷 864-867页

作者： li Ping Wang li min zhao Wen Zhi li Rui Qing Chu Long Tan Xiu Xiu zhao Gang Wang College of Materials Science and Engineering Liaocheng UniversityLiaocheng 252059China

The triple-shelled hollow spheres with optical properties were prepared via reversible addition-fragmentation chain transfer (RAFT) *** removal the core templates of the poly(styrene),the hollow silica spheres were *** coating process of poly(methyl methacrylate)(PMMA) on the hollow silica spheres surface via surface RAFT polymerization was performed *** polymers coated on the hollow spheres surfaces were end-functionalized by trithiocarbonate,and they were used as RAFT agent to proceed the chain extension polymerization using Tb complex as *** samples were characterized by FT-IR,SEM and luminescence spectroscopy *** results indicated that the triple-shelled hollow spheres had been prepared successfully and the average diameter of the hollow core was about 1μm.

关键词： Hollow spheres Optical properties Polymers Surfaces Luminescence

An Approximation Algorithm Based on Seeding Algorithm for Fuzzy k-Means Problem with Penalties

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Journal of the Operations Research Society of China 2024年第2期12卷 387-409页

作者： Wen-zhao liu min li School of Mathematics and Statistics Shandong Normal UniversityJinan 250014ShandongChina

As a classic NP-hard problem in machine learning and computational geometry,the k-means problem aims to partition the given dataset into k clusters according to the minimal squared Euclidean *** from k-means problem and most of its variants,fuzzy k-means problem belongs to the soft clustering problem,where each given data point has relationship to every center *** to fuzzy k-means problem,fuzzy k-means problem with penalties allows that some data points need not be clustered instead of being paid *** this paper,we propose an O(αk In k)-approximation algorithm based on seeding algorithm for fuzzy k-means problem with penalties,whereαinvolves the ratio of the maximal penalty value to the minimal ***,we implement numerical experiments to show the effectiveness of our algorithm.

关键词： Approximation algorithm Seeding algorithm Fuzzy k-means problem with penalties

Probing the Kinematic Signatures of Planet Formation in the Gas Disk of MWC 480

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Research in Astronomy and Astrophysics 2024年第6期24卷 110-118页

作者： min zhao Haochuan Yu Zhengxiang li Department of Astronomy Beijing Normal UniversityBeijing 100875China Sub-department of Astrophysics Department of PhysicsUniversity of OxfordOxfordOX13RHUK

The disk around MWC 480 has shown multiple substructures in both dust and gas observations,possibly suggesting ongoing planet formation in *** this paper,we explore the gas kinematics of the MWC 480 disk by analyzing the archival Atacama Large Millimeter/submillimeter Array observations of^(12)CO(J=2-1),^(13)CO(J=2-1),and C^(18)O(J=2-1).By modeling the line-of-sight velocities,inferred from the Doppler shifts of the emission lines,we are able to decompose the three-dimensional(3D)velocity field of the disk into rotational,radial,and vertical *** analysis reveals the presence of large-scale gas flows in the(r,z)***,we identify potential meridional flows across various heights as traced by all three CO isotopologues in the 80–120 au region,possibly associated with ongoing planet formation activities in this ***,we find upward flows near 200 au for all three CO isotopologues,which may point to the presence of disk winds.

关键词： protoplanetary disks planet-disk interactions planet-star interactions

BROADCAST SCHEDUliNG WITH MIMO liNKS IN MULTI-HOP AD HOC NETWORKS

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Journal of Electronics(China) 2007年第4期24卷 477-483页

作者： Zhang Guanghui li Jiandong zhao min li Changle State Key Lab. of ISN Information Science Inst. Broadband Wireless Communications Lab. Xidian University Xi＇an 710071 China

As the current medium access control protocols with Multiple Input Multiple Output （MIMO） links only bear point to point service, broadcast scheduling algorithm in ad hoc networks with MIMO links is proposed. The key to the proposed broadcast scheduling algorithm is the time slot scheduling algorithm which guarantees collisi~）n-free transmissions for every node and the mini- mum frame length. The proposed algorithm increases the simultaneous transmissions of MIMO links efficiently. Due to the interference null capacity of MIMO links, the interference node set of each node can decrease from two-hop neighbors to one-hop neighbors possibly. Simulation results show that our algorithm can greatly improve network capacity and decrease average packet delay.

关键词： Multiple Input Multiple Output (MIMO) Time Division Multiple Access (TDMA) Broadcast Multihop ad hoc network

Texture evolution of commercial pure Ti during cold rolling and recrystallization annealing

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International Journal of minerals,Metallurgy and Materials 2012年第6期19卷 530-535页

作者： Hai-tao Jiang Ji-xiong liu Zhen-li Mi Ai-min zhao Yan-jun Bi Metallurgical Engineering Research Institute University of Science and Technology Beijing Beijing 100083 China

X-ray diffraction （XRD） was employed to analyze the texture evolution of commercial pure （CP） Ti during cold rolling and re- crystallization annealing. The texture components were measured by electron backscattered diffraction （EBSD） after recrystallization an- nealing. The CP Ti tends to form a texture with the basal pole tilted 30°-40° away from the normal direction toward the transverse direction. The texture of the initial hot-rolled plate can be classified into three kinds, i.e., the pyramid texture （1013）[5230] and （2021）[1015], the basal plane texture （0001）[2110], and the stronger_prism_texture （1120）[0001]. After cold rolling and annealing （700℃,60 min）,_the main texture components are the cold-rolled texture （1125）[1123] and the recrystallized texture （1013）[5230]. The texture （2021）[1015] is in- herited from the texture of the initial hot-rolled plate with the decrease of orientation density gradually. The volume contents of the cold-rolled texture {2115}（0110） and the recrystallized texture {1013}（1210） are calculated by EBSD. After recrystallization annealing, the specimen is rich in the recrystallized texture and inherits some of texture components from the cold-rolled texture. When the annealing time is prolonged, the anisotropic value decreases.

关键词： titanium cold rolling recrystallization annealing textures

Efficacy and safety of Kangxian Huanji Granule as adjunctive treatment in acute exacerbation of idiopathic pulmonary fibrosis:An exploratory randomized controlled trial

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Journal of Integrative Medicine 2023年第6期21卷 543-549页

作者： Jian-sheng li Hai-long Zhang Wen Guo Lu Wang Dong Zhang li-min zhao Miao Zhou Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan&Education ministry of China Henan Key Laboratory of Chinese Medicine for Respiratory DiseasesHenan University of Chinese MedicineZhengzhou 450046Henan ProvinceChina Respiratory Department the First Affiliated Hospital of Henan University of Chinese MedicineZhengzhou 450000Henan ProvinceChina Department of Respiratory and Critical Care Medicine Henan Provincial People’s HospitalZhengzhou 463599Henan ProvinceChina Respiratory Department the Third Affiliated Hospital of Henan University of Chinese MedicineZhengzhou 450003Henan ProvinceChina

Background:Acute exacerbation of idiopathic pulmonary fibrosis(AE-IPF)is an important occurrence in the natural history of idiopathic pulmonary fibrosis(IPF),associated with high hospitalization rates,high mortality and poor *** present,there is no effective treatment for *** herbal medicine has some advantages in treating IPF,but its utility in AE-IPF is ***:The treatment of AE-IPF with Kangxian Huanji Granule(KXHJ),a compound Chinese herbal medicine,lacks an evidence-based *** study explores the efficacy and safety of KXHJ in patients with ***,setting,participants and interventions:Wedesigned a randomized,double-blind,placebo-controlled,exploratory clinical trial.A total of 80 participants diagnosed with AE-IPF were randomly assigned to receive KXHJ or a matching placebo;the treatment included a 10 g dose,administered twice daily for 4 weeks,in addition to conventional *** were followed up for 12 weeks after the *** outcome measures:The primary endpoints were treatment failure rate and all-cause *** endpoints included the length of hospitalization,overall survival,acute exacerbation rate,intubation rate,the modified British Medical Research Council(mMRC)score,and the St George’s Respiratory Questionnaire for IPF(SGRQ-I)***:The rate of treatment failure at 4 weeks was lower in the intervention groupcompared to the control group(risk ratio[RR]:0.22;95%confidence interval[CI]:0.051 to 0.965,P=0.023).There was no significant difference in all-causemortality at 16 weeks(RR:0.75;95%CI:0.179 to 3.138;P>0.999)or in the acute exacerbation rate during the 12-week follow-up period(RR:0.69;95%CI:0.334 to 1.434;P=0.317).The intervention group had a shorter length of hospitalization than the control group(mean difference[MD]:–3.30 days;95%CI,–6.300 to–0.300;P=0.032).Significant differences in the mean change from baseline in the mMRC(between-group difference:–0.67;

关键词： Idiopathic pulmonary fibrosis Acute exacerbation Chinese herbal medicine Integrative medicine Randomized controlled trial

Structure-based design of novel heterocyclesubstituted ATDP analogs as non-nucleoside reverse transcriptase inhibitors with improved selectivity and solubility

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Acta Pharmaceutica Sinica B 2023年第12期13卷 4906-4917页

作者： li-min zhao Christophe Pannecouque Erik De Clerc Shuai Wang Fen-Er Chen Key Laboratory of Natural Resources of Changbai Mountain&Functional Molecules Ministry of EducationYanbian University College of PharmacyYanbian UniversityYanji 133002China Engineering Center of Catalysis and Synthesis for Chiral Molecules Department of ChemistryFudan UniversityShanghai 200433China Shanghai Engineering Center of Industrial Asymmetric Catalysis for Chiral Drugs Shanghai 200433China Rega Institute for Medical Research KU LeuvenLeuven B-3000Belgium

Following on our recently developed biphenyl-ATDP non-nucleoside reverse transcriptase inhibitor ZLM-66(SI=2019.80,S=1.9μg/mL),a series of novel heterocycle-substituted ATDP derivatives with significantly improved selectivity and solubility were identified by replacement of the biphenyl moiety of ZLM-66 with heterocyclic group with lower ***,the representative analog 7w in this series exhibited dramatically enhanced selectivity and solubility(SI=12,497.73,S=4472μg/mL)in comparison with ZLM-66(SI=2019.80,S=1.9μg/mL).This new NNRTI conferred low nanomolar inhibition of wild-type HIV-1 strain and tested mutant strains(K103N,L1001,Y181C,E138K,and K103N+Y181C).The analog also demonstrated favorable safety and pharmacokinetic profiles,as evidenced by its insensitivity to CYP and hERG,lack of mortality and pathological damage,and good oral bioavailability in rats(F=27.1%).Further development of 7w for HIV therapy will be facilitated by this valuable information.

关键词： HIV-1 RT NNRTIS ATDP Pyridone