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中国冰球竞技后备人才培养的现实困境与纾解方略

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哈尔滨体育学院学报 2024年第4期42卷 35-41页

作者：赵华鑫朱佳滨赵华磊哈尔滨体育学院研究生院黑龙江哈尔滨150008 哈尔滨体育学院冬季奥林匹克学院黑龙江哈尔滨150008 济南大学党委宣传部山东济南250022

基于建设中国式现代化体育强国的历史方位,后备人才已成为我国冰球运动高质量发展的重要支撑。采用文献资料、逻辑分析等研究方法发现在现阶段我国冰球竞技后备人才培养过程中,存在冰球人才社会储备不足,制约后备力量培养规模;“一体化... 详细信息

基于建设中国式现代化体育强国的历史方位,后备人才已成为我国冰球运动高质量发展的重要支撑。采用文献资料、逻辑分析等研究方法发现在现阶段我国冰球竞技后备人才培养过程中,存在冰球人才社会储备不足,制约后备力量培养规模;“一体化”人才培养体系不畅,“多元化”模式融合壁垒凸显;体校传统优势逐步淡化,培养主体功能日益弱化;科智赋能训练要素不足,教练执教能力亟待提升;冰球竞赛体系搭建不畅,协会主体存在治理缺位的发展困境。研究得出纾解方略:加快冰球项目推广普及,形成多元投入培养机制;新型举国体制统筹多元模式,精准化理念融入培养全过程;深化体校教学服务改革,实施运动员全周期教育;多方协同完善科技保障,培养“大师级”冰球教练员;释放冰球协会治理动能,发挥赛事培育杠杆功效。

关键词：冰球竞技后备人才现实困境纾解方略

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指数有界双连续n阶m次积分C群的指数公式

西南民族大学学报（自然科学版） 2024年第2期50卷 199-205页

作者：贺凯丽赵华新刘娟娟延安大学数学与计算机科学学院陕西延安716000

利用经典算子半群理论中的研究方法,基于指数有界双连续n阶m次积分C群和预解式的定义,给出指数有界双连续n阶m次积分C群与其预解式间积分的表示关系,得到指数有界双连续n阶m次积分C群的指数公式,从而推广了n阶m次积分C半群的相关结果,... 详细信息

利用经典算子半群理论中的研究方法,基于指数有界双连续n阶m次积分C群和预解式的定义,给出指数有界双连续n阶m次积分C群与其预解式间积分的表示关系,得到指数有界双连续n阶m次积分C群的指数公式,从而推广了n阶m次积分C半群的相关结果,丰富了算子半群理论的研究内容.

关键词：双连续n阶m次积分C群指数公式指数有界预解式

Nootkatone Improves Chronic Unpredictable Mild Stress-Induced Depressive-Like Behaviors by Repressing NF-κB/NLRP3-Mediated Neuroinflammation

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Chinese Journal of Integrative Medicine 2023年第1期29卷 37-43页

作者： zhao xin-hua AN Na XIA Meng-huan LIU Wen-ping WANG Qing-qi BAO Ji-zhang Basic Medical College Shanghai University of Traditional Chinese MedicineShanghai201203China Geriatrics Department Shanghai Mental Health CenterShanghai200030China Hematological Department Shanghai Municipal Hospital of Traditional Chinese MedicineShanghai University of Traditional Chinese MedicineShanghai200071China

Objective:To explore the effect of nootkatone(NKT) on chronic unpredictable mild stress(CUMS)-induced depressive-like behaviors and the mechanism underlying NKT improving the depressivelike ***:The CUMS-induced depression model was established in *** mice were randomized into 5 groups(n=10) in accordance with a random number table:control group,CUMS group,CUMS+NKT(6 mg/kg) group,CUMS+NKT(12 mg/kg) group,and CUMS+ketamine *** the 22th day,NKT(6 or 12 mg/kg) or ketamine(0.5 mg/kg) was given with intragastric administration every day for21 *** tests including forced swimming test(FST),tail suspension test(TST),sucrose preference test(SPT) and open-field test(OFT) were carried *** mRNA and protein expressions of interleukin(IL)-1β,IL-18,IL-6,and tumor necrosis factor(TNF)-α in hippocampus were assessed using quantitative realtime polymerase chain reaction(PCR),Western blot analysis,and enzyme linked immunosorbent *** nuclear factor-κB(NF-κB)/NOD-like receptor 3(NLRP3) inflammasome pathway was analyzed using Western blot and immunofluorescence ***:NKT treatment improved CUMS-induced depressivelike behaviors in mice(P<0.05 or P<0.01).NKT significantly decreased the mRNA and protein levels of IL-1β,IL-18,IL-6,and TNF-α in hippocampus of CUMS mice(P<0.05 or P<0.01).Furthermore,NKT repressed CUMS-induced activation of NF-κB signaling and NLRP3 inflammasome(P<0.01).More important,Nigericin,a NLRP3 activator,destroyed the effect of NKT on repressing neuroinflammation and improving depressive-like behaviors(P<0.05 or P<0.01).Conclusion:NKT ameliorates the depressive-like symptoms,in part by repressing NF-κB/NLRP3-mediated neuroinflammation.

关键词： nootkatone depressive disorder nuclear factor-κB NOD-like receptor 3 nuroinflammation

Nickel-catalyzed carbonylative four-component 1,4-dicarbofunctionalization of 1,3-enynes

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Science China Chemistry 2024年第6期67卷 2029-2038页

作者： Yan zhao Qi-Chao Shan Hong xin Pin Gao Xu Yang xin-hua Duan Li-Na Guo Department of Chemistry School of ChemistryXi’an Key Laboratory of Sustainable Energy Material Chemistry and Engineering Research Center of Energy StorageMaterials and DevicesMinistry of EducationXi’an Jiaotong UniversityXi’an710049China School of Electrical Engineering Xi’an Jiaotong UniversityXi’an710049China

An efficient Ni-catalyzed four-component 1,4-carbocarbonylation of 1,3-enynes with activated alkyl halides and arylboronic acids under atmospheric pressure of CO is *** tuning the electronic and steric effects of alkyl radicals,both electronrich and electron-deficient 1,3-enynes were compatible with this *** protocol features mild conditions,broad substrate scope,excellent functional group compatibility and facile gram-scale synthesis,providing a practical approach to the quaternary carbon center-containing allenyl *** study revealed that the acyl-NiIIspecies plays an important role in both the coupling and the alkyl radical generation processes.

关键词： Ni catalysis four-component 1 4-carbocarbonylation 1 3-enynes

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Microphase Separation of Semiflexible Ring Diblock Copolymers

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Chinese Journal of Polymer Science 2024年第2期42卷 267-276,I0011页

作者： Dan-Yan Qin Sheng-Da zhao Zhi-xin Liu Jing Zhang xing-hua Zhang School of Physical Science and Engineering Beijing Jiaotong UniversityBeijing100044China

Aiming at the difficult problem of solving the conformation statistics of complex polymers, this study presents a novel and concise conformation statistics theoretical approach based on Monte Carlo and Neural Network method. This method offers a new research idea for investigating the conformation statistics of complex polymers, characterized by its simplicity and practicality. It can be applied to more complex topological structure, more higher degree of freedom polymer systems with higher dimensions, theory research on dynamic self-consistent field theory and polymer field theory, as well as the analysis of scattering experimental data. The conformation statistics of complex polymers determine the structure and response properties of the system. Using the new method proposed in this study, taking the semiflexible ring diblock copolymer as an example, Monte Carlo simulation is used to sample this ring conformation to construct the dataset of polymer. The structure factor describing conformation statistics are expressed as continuous functions of structure parameters by neural network supervised learning. This is the innovation of this work. As an application, the structure factors represented by neural networks were introduced into the random phase approximation theory to study the microphase separation of semiflexible ring diblock copolymers. The influence of the ring's topological properties on the phase transition behavior was pointed out.

关键词： Ring copolymer Diblock copolymers Semiflexible The order-disorder transition

案例教学在“现代植物生产理论与技术”课程中的应用探索——以沈阳农业大学为例

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教育教学论坛 2024年第25期 153-156页

作者：赵新华高士博蒋春姬于海秋沈阳农业大学农学院辽宁沈阳110866

“现代植物生产理论与技术”作为一门新兴的综合性和实践性课程,对案例化的教学需求较为迫切。针对案例教学在沈阳农业大学“现代植物生产理论与技术”教学的运用中存在的案例选择不当、案例呈现形式单一、学生参与度低和教学方法不够... 详细信息

“现代植物生产理论与技术”作为一门新兴的综合性和实践性课程,对案例化的教学需求较为迫切。针对案例教学在沈阳农业大学“现代植物生产理论与技术”教学的运用中存在的案例选择不当、案例呈现形式单一、学生参与度低和教学方法不够创新等问题,分别从典型案例开发、教学方法和教学评价改革等方面进行一系列的探索,以激发学生的兴趣及主动探索的欲望,提高学生的自主学习能力和创新能力,培养适应性强的高层次农业人才。

关键词：现代植物生产理论与技术案例教学应用探索

In-situ U-Pb Dating of Quartz:A Preliminary Study

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Journal of Earth Science 2024年第2期35卷 726-728页

作者： Entao Liu Jian-xin zhao Songqi Pan Detian Yan hua Wang Hubei Key Laboratory of Marine Geological Resources China University of GeosciencesWuhan 430074China Radiogenic Isotope Facility School of Earth and Environmental SciencesThe University of QueenslandBrisbane Qld 4072Australia PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China Key Laboratory of Tectonics and Petroleum Resources Ministry of EducationChina University of GeosciencesWuhan 430074China

CHALLENGES AND RESEARCH PROGRESS Recent advancements in analytical capabilities and the precision of measuring instruments in in-situ laser ablation mass spectrometry(LA-MC-ICPMS)have markedly broad ened the utility of the U-Pb isotopic *** progress has paved the way for accurately determining the ab solute ages of minerals with low uranium *** re cent years,in-situ U-Pb dating has witnessed rapid advance ments across diverse mineral types,encompassing calcite,dolo mite,fluorite,nacrite,anatase,and wolframite(Roberts et al.,2020).

关键词： dating minerals isotopic

A New Orthorhombic Phase of ZrW_(1.6) Mo_(0.4)O_8 at Ambient Pressure

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Chemical Research in Chinese Universities 2002年第3期18卷 233-236页

作者： zhao xin hua WANG Qi MA Hui Department of Chemistry Analyzing and Testing Center Beijing Normal UniversityBeijing 100875P.R.China

Nanocrystallite δ ′ ZrW 1.6 Mo 0.4 O 8 was prepared in the precursor route synthesis. The characterization by means of powder X ray diffraction (XRD) and selected area electron diffraction (SAED) showed it crystallized in a orthorhombic crystal system with a =0.896 9(7) nm, b =0.701 1(8) nm, c =0.596(1) nm. The possible space group is Pnnm (58) or Pnn2 (34). The compound crystallizes in a metastable phase during the synthesis process depending on temperature and crystallization time.

关键词： Precursor route synthesis Powder XRD Selected area electron diffraction

Electrochemically recycling degraded superalloy and valorizing CO_(2)in the aff ordable borate-modified molten electrolyte

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Tungsten 2024年第2期6卷 382-393页

作者： Xiang Chen Yuan Sun Long Wang xin Qu Yan zhao Hong-Wei Xie Di-hua Wang hua-Yi Yin Key Laboratory for Ecological Metallurgy of Multimetallic Mineral of Ministry of Education School of MetallurgyNortheastern UniversityShenyang 110819China Institute of Metal Research Chinese Academy of ScienceShenyang 110016China School of Resource and Environmental Science Wuhan UniversityWuhan 430072China

Integrating electrochemical reduction of CO_(2)and electrochemical oxidation to recycle degraded superalloys is a promising solution to ease resource scarcity and safeguard environmental ***,we propose an electrochemical technique for the conversion of bulk superalloy scraps and CO_(2)into oxide powder at the anode and solid carbon at the cathode,*** particular,a borax-modifi ed CaCl_(2)-based molten salt electrolyte is used for enhancing the electrochemical oxidation of superalloy *** a temperature of 700℃and a voltage of 2.8 V,90.55 wt.%of alloy scraps were oxidized in a molten CaCl_(2)–NaCl–CaCO_(3)–Na_(2)B_(4)O_(7)with an acid–base ratio(K_(a/b))of *** synergy of Cl−and B_(4)O_(7)2−of electrolyte prevents the passivation of the alloy anode and enables continuous ***,the Ni and Co in the anode products are recovered by sulfation roasting with recovery efficiencies of 85.58%and 95.27%for Ni and Co,***,modulating the alkalinity of the electrolyte for enhancing oxidation/pulverization of alloy scrap anode provides new insight into electrochemically recovering superalloy scraps.

关键词： Superalloy scraps Recycling Molten salt Alkalinity Electrochemical oxidation Cobalt