新形势下我国航海院校境外办学问题与对策

随着我国境外办学政策的变化,以及“一带一路”教育行动的推进,新时期航海教育对外开放面临新形势。在调研航海院校境外办学现状的基础上,分析航海院校境外办学存在的问题,提出改善航海教育境外办学的建议,包括强化政策支持、完善培养方案、建设师资队伍、推动教材建设、加强课程建设等。     

20世纪文化人类学视野下的楚辞研究回顾

20世纪楚辞学界先后涌现出不少学术成就突出的大家,他们大多提倡采用新的方法来进行学术研究,包括借鉴其他学科的研究成果和研究思路,其中采用文化人类学方法进行研究的学者代不乏人,硕果累累。试对这一历史过程做简要的梳理,以期对新世纪楚辞研究提供一些有益的借鉴。     

农业科技成果转化资金运行机制研究

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图书馆如何选择图书供应商

本文对图书供应商的标准进行了全面剖析,试图为图书馆科学选择图书供应商提供有效参考。     

论图书馆工作的实质

通过中国图书馆形成和发展的历史、图书馆的社会职能以及图书馆工作的规律三个方面详细地论证了图书馆工作的实质就是文献信息的存贮与传递.     

Facile Fabrication of Fe_3O_4@TiO_2@C Yolk–Shell Spheres as Anode Material for Lithium Ion Batteries

Transition metal oxides have been actively exploited for application in lithium ion batteries due to their facile synthesis,high specific capacity,and environmental-friendly.In this paper,Fe_3O_4@TiO_2@C yolk-shell(Y-S) spheres,used as anode material for lithium ion batteries,were successfully fabricated by Stober method.XRD patterns reveal that Fe_3O_4@TiO_2@C Y-S spheres possess a good crystallinity.But the diffraction peaks' intensity of Fe_3O_4 crystals in the composites is much weaker than that of bare Fe_3O_4 spheres,indicating that the outer anatase TiO_2@C layer can cover up the diffraction peaks of inner Fe_3O_4 spheres.The yolk-shell structure of Fe_3O_4@TiO_2@C spheres is further characterized by TEM,HAADFSTEM,and EDS mapping.The yolk-shell structure is good for improving the cycling stability of the inner Fe_3O_4 spheres during lithium ions insertion-extraction processes.When tested at 200 mA/g,the Fe_3O_4@TiO_2@C Y-S spheres can provide a stable discharge capacity of 450 mAh/g over 100 cycles,which is much better than that of bare Fe_3O_4 spheres and TiO_2@C spheres.Furthermore,cyclic voltammetry curves show that the composites have a good cycling stability compared to bare Fe_3O_4 spheres.     

Hydrogen Bonding-Assisted Synthesis of Silica/Oxidized Mesocarbon Microbeads Encapsulated in Amorphous Carbon as Stable Anode for Optimized/Enhanced Lithium Storage

The practical application of silica-based composites as an alternative to commercial graphite anode materials is hampered by their large volumetric expansion,poor conductivity,and low Coulombic efficiency.In this work,a novel silica/oxidized mesocarbon microbead/amorphous carbon(SiO_2/O'MCMB/C) hierarchical structure in which SiO_2 is sandwiched between spherical graphite and amorphous carbon shell was succes sfully fabricated through hydrogen bonding-assisted self-assembly and post-carbon coating method.The obtained three-layer hierarchical structure effectively accommodates the volumetric expansion of SiO_2 and significantly enhances the electronic conductivity of composite materials.Moreover,the outer layer of amorphous carbon effectively increases the diffusion rate of lithium ions and promotes the formation of stable SEI film.As a result,the SiO_2/O'MCMB/C composite exhibits superior electrochemical performance with a reversible capacity of 459.5 mA h/g in the first cycle,and the corresponding Coulombic efficiency is 62.8%.After 300 cycles,the capacity climbs to around 600 mA h/g.This synthetic route provides an efficient method for preparing SiO_2 supported on graphite with excellent electrochemical performance,which is likely to promote its commercial applications.     

硝基苯制备实验的改进

近期,由于世界银行组织资助国内师专学校,使学校实验条件大为改善。但在应用到货仪器、设备时,需要对原来教学中的一些实验步骤做必要的改进。本文将介绍半微量法制备硝基苯实验的改进。     

自动控制理论教学改革的思路与实践

针对《自动控制理论》课程的特点,分析了该课程目前教学存在的问题。结合教学改革实践,提出传统教学模式与现代教学手段要相互配合,取长补短。实践表明,这种教学方式有助于教学质量的提高。     

低压热水锅炉的氧腐蚀及防止措施

分析了氧腐蚀对低压热水锅炉的危害、特点、易发生的部位；提出了在锅炉运行中防止氧腐蚀的措施．以及低压热水锅炉在停炉期间的防腐措施。