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应为、难为与可为:新时期乡村教师新乡贤角色承担的多维分析

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黄冈师范学院学报 2025年第1期45卷 76-82页

作者：朱广兵辛治洋马鞍山师范高等专科学校安徽和县238200 安徽师范大学教育科学学院安徽芜湖241000

通过对乡村教师在乡村建设中的历史经验和现代实践进行系统梳理,发现学术界关于乡村教师与乡村社区治理之间关系的探讨主要可归纳为三种视角:乡村教师治村论、治教论以及助村论。在美丽乡村建设的背景下,乡村教师被赋予了新乡贤角色,这... 详细信息

通过对乡村教师在乡村建设中的历史经验和现代实践进行系统梳理,发现学术界关于乡村教师与乡村社区治理之间关系的探讨主要可归纳为三种视角:乡村教师治村论、治教论以及助村论。在美丽乡村建设的背景下,乡村教师被赋予了新乡贤角色,这一角色以乡建精英和文化使者的身份为标志,同时新乡贤角色的扮演亦能促进乡村青年教师的专业成长。然而,在实际工作中,乡村教师在扮演新乡贤角色时遭遇了角色定位模糊、工作负担过重以及能力单一等多重障碍。为促进乡村教师有效实现新乡贤角色的内生型构建,本研究认为需从教育管理的顶层设计、师范教育中的专业培训以及教师履职过程中的主观能动性三个层面着手,提供相应的支持与改进措施。

关键词：乡村教师新乡贤角色乡村振兴乡村文化乡村教育

Lattice Boltzmann method for simulating flows in open-channel with partial emergent rigid vegetation cover

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Journal of Hydrodynamics 2019年第4期31卷 717-724页

作者： Zhong-hua Yang Feng-peng Bai Wen-xin Huai Cheng-guang li State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan 430072 China Changjiang Water Resources Protection Institute Wuhan 430051 China Shandong Provincial Key Laboratory of Water Resources and Water Environment Water Resources Research Institute of Shandong Province Jinan 250013 China

Flows in open-channel with partial emergent rigid vegetation cover are simulated using the lattice Boltzmann method (LBM) described by the 2-D nonlinear shallow water equations. The effect of vegetation is represented with the vegetation roughness coefficient, which is related to the vegetation density, diameter of the vegetation elements and drag coefficient. The model is verified by three numerical tests: flow in a 180° curved open channel with partial vegetation cover at the outer bank, flow in a rectangular channel with a finite patch of vegetation and flow in a rectangular channel with a vegetated bank. Numerical results are compared with the experimental data, and the good agreement proved that the presented model can model the vegetated channel flows correctly.

关键词： Open-channel flow rigid vegetation lattice Boltzmann method (LBM) shallow water equations vegetation roughness coefficient

The effect of waist twisting on walking speed of an amphibious salamander like robot

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Acta Mechanica Sinica 2016年第3期32卷 546-550页

作者： xin-Yan Yin li-Chao Jia Chen Wang guang-Ming Xie Intelligent Control Laboratory College of EngineeringPeking University Key State Laboratory for Turbulence & Complex Systems College of Engineering Peking University

Amphibious salamanders often swing their waist to coordinate quadruped walking in order to improve their crawling speed. A robot with a swing waist joint, like an amphibious salamander, is used to mimic this locomotion.A control method is designed to allow the robot to maintain the rotational speed of its legs continuous and avoid impact between its legs and the ground. An analytical expression is established between the amplitude of the waist joint and the step length. Further, an optimization amplitude is obtained corresponding to the maximum stride. The simulation results based on automatic dynamic analysis of mechanical systems（ADAMS） and physical experiments verify the rationality and validity of this expression.

关键词： Terrestrial locomotion Step length Waist twisting Walking speed

Gradient estimates for porous medium equations under the Ricci flow

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Applied Mathematics(A Journal of Chinese Universities) 2016年第4期31卷 481-490页

作者： SHEN li-ju YAO Sha ZHANG guang-ying REN xin-an Department of Mathematics China University of Mining and Technology

A local gradient estimate for positive solutions of porous medium equations on complete noncompact Riemannian manifolds under the Ricci flow is derived. Moreover, a global gradient estimate for such equations on compa... 详细信息

关键词： Gradient estimate porous medium equations Ricci flow.

{411}<148> Texture in Thin-Gauge Grain-Oriented Silicon Steel

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Acta Metallurgica Sinica(English Letters) 2016年第6期29卷 554-560页

作者： Cheng-Xu He Fu-Yao Yang guang Ma xin Chen li Meng School of Materials Science and Engineering University of Science and Technology Beijing Department of Electrical Engineering New Materials and Microelectronics State Grid Smart Grid Research Institute Beijing R&D Department East China Branch of Central Iron and Steel Research Institute

The significant occupancy of {411}〈148〉texture exists in the thin-gauge grain-oriented silicon steel(TGCRGO is defined that thickness of the sheet is〈0.25 mm and the reduction in cold rolling is more than 90%) which has been considered to have obviously effects on the abnormal growth of Goss-oriented grains during the secondary recrystallization process. The microstructures of the TG-CRGO were investigated by X-ray diffraction and electron back-scattered diffraction in this study. It was found that {411}〈148〉〉texture mainly exists in the center layer of hot-rolled as well as normalized *** the increase in cold rolling reduction, {411}〈148〉 orientation gradually rotates to a-fiber texture(〈110〉//RD).Finally, few {411}〈148〉would retain at the boundaries of deformed a-fiber grains(〈110〉//RD) as the reduction in cold rolling reaches 90%. After annealing treatment, a small amount of c-fiber textures(〈111〉//ND) preferably nucleates and recrystallizes between the DBs(deformation bands) at first; then, the {411}〈148〉 recrystallization texture occurs and mainly nucleates at the grains boundaries of the deformed a-fiber grains, and also quite a few {411}〈148〉orientation grains nucleate in the inner of {112}〈110〉grains. But this phenomenon was not observed in the {100}〈011〉deformation *** respect to the occurrence of {411}〈148〉recrystallization texture, it is mainly induced by strong a-fiber as well as weak c-fiber textures formed during cold rolling other than originating from {411}〈148〉 regions in hot bands.

关键词： Thin-gauge grain-oriented silicon steel(TG-CRGO) {411}〈148〉texture x-Fiber texture Recrystallization Electron back-scattered diffraction(EBSD)

Enhancing energetic performance of metal-organic complex-based metastable energetic nanocomposites by spray crystallization

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Defence Technology（防务技术） 2023年第6期24卷 203-213页

作者： Ke-xin Wang li-xiao Shen Bin Yuan Yan li Shun-guan Zhu lin Zhang Zhen-xin Yi Chen-guang Zhu School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing210941China

Energetic metal-organic complexes have been involved in nanothermites as novel ***,the existing preparation methods often lead to mixing inhomogeneity and small contact area of ingredients,the reactivity and functionality of the novel energetic nanocomposites are still *** this work,spray crystallization(SC)method was used to prepare novel energetic nanocomposites,the high-energy metal-organic complex[Ni(CHZ)_(3)](ClO_(4))_(2)(CHZ=1,3-diaminourea)was composited with nanoaluminum(n-Al).Results showed that n-Al/[Ni(CH_(2))_(3)](ClO_(4))_(2)energetic nanocomposites prepared by SC method increased heat release to 2977.6 J/g and peak pressure to 3.91 MPa with higher pressurization rate(1324.06 MPa/s),decreased sensitivity thresholds(>100 mJ)to electrostatic discharge(ESD)and enhanced detonation ability compared with[Ni(CHZ)_(3)](ClO_(4))_(2)alone and physically mixed(PM)n-Al/[Ni(CHZ)_(3)](ClO_(4))_(2).These results proved that it is significant to introduce energetic metal-organic complexes with inherent high energy in new-concept n-Al/energetic metal-organic complexes nanocomposites through SC method for a better performance of its application.

关键词： Energetic metal-organic complexes Nano aluminum Energetic nanocomposites Spray crystallization Thermite reaction

A translational study of somatosensory evoked potential time–frequency components in rats,goats,and humans

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Neural Regeneration Research 2021年第11期16卷 2269-2275页

作者： Hong-Yan Cui Yi-xin Wu Rong li guang-Sheng li Yong Hu Institute of Biomedical Engineering Chinese Academy of Medical Sciences and Peking Union Medical CollegeTianjinChina Department of Orthopaedics and Traumatology The University of Hong KongHong Kong Special Administrative RegionChina Spinal Division Department of OrthopaedicsAffiliated Hospital of Guangdong Medical UniversityGuangdong ProvinceChina Department of Orthopaedics and Traumatology The University of Hong Kong-Shenzhen HospitalShenzhenGuangdong ProvinceChina

Somatosensory evoked potentials(SEPs)have been widely used to assess neurological function in clinical practice.A good understanding of the association between SEP signals and neurological function is helpful for precise diagnosis of impairment *** studies on SEPs have been reported in animal ***,few studies have reported the relationships between SEP waveforms in animals and those in *** this study,we collected normal SEP waveforms and decomposed them into specific time–frequency components(TFCs).Our results showed three stable TFC distribution regions in intact goats and rats and in *** we induced spinal cord injury in the animal models,a greater number of small TFC distribution regions were observed in the injured goat and rat groups than in the normal ***,there were significant correlations(Plinear relationships between the main SEP TFCs of the human group and those of the goat and rat groups.A stable TFC distribution of SEP components was observed in the human,goat and rat groups,and the TFC distribution modes were similar between the three *** in various animal models in this study could be translated to future clinical studies based on SEP TFC *** studies were approved by the Institutional Review Board of the University of Hong Kong/Hospital Authority Hong Kong West Cluster(approval *** 05-312 T/975)on December 5,*** experiments were approved by the Committee on the Use of live Animals in Teaching and Research of li Ka Shing Faculty of Medicine of the University of Hong Kong(approval *** 2912-12)on January 28,*** experiments were approved by the Animal Ethics Committee of Affiliated Hospital of guangdong Medical University(approval ***2002132)on March 5,2018.

关键词： animal models chronic compression latency somatosensory evoked potentials spinal cord injury time-frequency analysis time-frequency components translational study

以系统观念推进进一步全面深化改革的原因廓清、内在要求与实践进路

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东北师大学报（哲学社会科学版） 2025年第1期 1-9页

作者：李效东杜玉中唐鑫北京交通大学马克思主义学院北京100044

系统观念是基础性的思想方法和工作方法。进一步全面深化改革是一项复杂的系统工程,需要以系统观念来把握改革的全局与重点、整体与部分、联系与区别。在进一步全面深化改革中坚持系统观念是基于马克思主义世界观与方法论的理论指导,是... 详细信息

系统观念是基础性的思想方法和工作方法。进一步全面深化改革是一项复杂的系统工程,需要以系统观念来把握改革的全局与重点、整体与部分、联系与区别。在进一步全面深化改革中坚持系统观念是基于马克思主义世界观与方法论的理论指导,是基于中国共产党领导改革开放历史经验的深刻总结,是应对进一步全面深化改革中多种复杂问题的必然要求。以系统观念推进进一步全面深化改革的内在要求关键在于坚持系统思考、坚持系统谋划、坚持系统部署、坚持系统推进与坚持系统集成。在推进进一步全面深化改革系统工程的实践进路中,需要坚持党对进一步全面深化改革系统的领导,在系统整体上突出进一步全面深化改革的着力重点,在系统全局中正确处理好进一步全面深化改革的重大关系。

关键词：系统观念进一步全面深化改革系统工程

Azimuthal elastic impedance-based Fourier coefficient variation with angle inversion for fracture weakness

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Petroleum Science 2020年第1期17卷 86-104页

作者： lin li Jia-Jia Zhang xin-Peng Pan guang-Zhi Zhang School of Geosciences China University of Petroleum(East China)Qingdao 266580ShandongChina School of Geoscience and Info-Physics Central South UniversityChangsha 410082HunanChina Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071ShandongChina

Quantitative inversion of fracture weakness plays an important role in fracture *** reservoirs with a set of vertical fractures as horizontal transversely isotropic media,the logarithmic normalized azimuthal elastic impedance(EI)is rewritten in terms of Fourier coefficients(FCs),the 90°ambiguity in the azimuth estimation of the symmetry axis is resolved by judging the sign of the second FC,and we choose the FCs with the highest sensitivity to fracture weakness and present a feasible inversion workflow for fracture weakness,which involves:(1)the inversion for azimuthal EI datasets from observed azimuthal angle gathers;(2)the prediction for the second FCs and azimuth of the symmetry axis from the estimated azimuthal EI datasets;and(3)the estimation of fracture weakness combining the extracted second FCs and azimuth of the symmetry axis iteratively,which is constrained utilizing the Cauchy sparse regularization and the low-frequency regularization in a Bayesian *** on synthetic and field data demonstrate that the 90°ambiguity in the azimuth estimation of the symmetry axis has been removed,and reliable fracture weakness can be obtained when the estimated azimuth of the symmetry axis deviates less than 30°,which can guide the prediction of fractured reservoirs.

关键词： Fracture weakness Azimuth of the symmetry axis Azimuthal Fourier coefficients HTI Azimuthal elastic impedance