提高科技含量 加速成果转化——六○八所架起通向市场的桥梁

六○八所是中国航空工业总公司所辖的军民结合、专业配套的工程开发应用综合性研究所,是我国唯一从事中小型航空发动机、直升机减速传动系统、轻型燃气轮机设计、研究、预研与试验的中心,拥有雄厚的技术实力,10余年来取得部省级以上重大科技成果77项。该所用活政策,拓宽市场,建立起科技成果与市场经济相结合的推广、应用、创新的科研机制,全方位多用途开辟高新技术渠道,让科技成果从试验室走向市场,目前全所科技成果转化率达88％。     

项目教学法在《单片机技术》课程中的实践研究

项目教学法就是通过实施一个完整的工程项目而进行的教学活动,是实践导向理论教学法中的一种,它体现了先进的职业教育理念,代表高等职业教育的一种方法,是培养高质量的具有实践动手能力的技能型人才的有效途径之一.桂林航天工业高等专科学校的<单片机技术>课程运用项目教学法,取得了一定的教学效果,也为高职课程教学改革提供一种教学参考模型.     

当代网络思想政治教育面临的矛盾

随着网络传播技术与信息技术的高速发展,网络给人们的生活带来了巨大的变化,丰富的网络资源在给人们带来正面影响的同时,也给人们带来了许多的负面影响.思想政治教育工作者可以利用计算机网络,依据传播学与思想宣传的理论与方法对人们进行思想政治教育,但在进行网络思想政治教育过程中,矛盾普遍存在于教育的整个过程中,如虚拟与现实,主导与自主,一元与多元,规范与自由,他律与自律等矛盾始终贯穿于整个教育之中,这些矛盾的存在与发展为当代网络思想政治教育工作提出了挑战.论文认为,思想政治教育工作者面对网络媒体的现实挑战,应该建立一套科学有效的应对方法.     

在高职高专基础上构建应用型本科会计专业实践教学体系的探索

如何做好从高职高专教育到应用型本科教育的衔接,是大多数刚刚“升本”的高校所要面临的重要课题.从会计专业实践教学来看,这一课题就是要在高职高专教育实践教学的不足基础之上,建立适合应用型本科的会计专业实践教学体系.     

内花键零件的加工

阐述了片梭织机上特殊模数的内花键零件的加工新方法。对零件精度、加工设备和加工程序进行了详细的分析和说明。     

试题库管理系统

本文论述了计算机试题库管理系统软件的模块设计，论述了系统数据的获取方式，介绍了程序设计中的一些技术处理，介绍了软件的特点。     

计算机网络技术专业课程体系的优化研究

论文分析了高校计算机网络技术专业课程体系的现状,借鉴国内外先进的教育培养模式,结合计算机网络技术教学的实践,给出计算机网络技术专业课程体系的指标体系及评价模型的优化方案,通过试运行,收到了良好的效果.     

Effect of Water Absorption on the Impact Properties of Carbon Fiber/Epoxy Composites

In this paper, the effects of test temperatures and time on the impact damage behavior of unidirectional carbon fiber reinforced epoxy resin composites, immersed in pure water, on a pendulum impact tester, was studied. The results show that immersion in liquids has a significant effect on the impact resistance of the unidirectional composite material. It is obvious that after immersion, the mass of the material increases. The fracture initiation forces as well as the fracture initiation energy decrease as the immersion time lengthens. Moreover, the higher the temperature and the longer the time are, the more the crack propagation energy and the ductility index will be. Immersion makes the fracture mode change from the dominant fiber fracture into dominant delamination. All in all, immersion decreases the impact resistance of the composites and causes the fracture mode to change.     

Preparation and Properties of Organically Modified Sepiolite/High-performance Epoxy Nanocomposites

Fibrous organic sepiolites (OSEP) and novel epoxy/OSEP nanocomposites were prepared, and different methods were investigated to produce an intercalated/exfoliated structure of OSEP. Experimental results show that the modifier molecules can be easily adsorbed by the sepiolite, but the layer space (d001) of the sepiolite, linked by means of covalent bond, remains unchanged. A proper method to solve this problem appears to exert large shearing force on the original sepiolite followed by its organic modification (OSEP2). The morphol-ogy observation shows that there are formed an even dispersion of nano-sized OSEP2 fibers in epoxy resin and a structure intercalated by epoxy molecules, which lead to significantly improved mechanical properties. Impact strength of the epoxy/OSEP2 nanocomposite increases from 32.1 kJ/m2 to 44.4 kJ/m2, 38.3% higher than that of pristine matrix with 3 wt% OSEP2 content. It is also noted that the flexural strength of the OSEP/epoxy composites has risen by about 3% higher than that of the pure epoxy resin.     

Mechanical Properties and Microstructure of In Situ TiB_2-7055 Composites

In order to fabricate a kind of high strength particulate reinforced aluminum-matrix composites, the high strength aluminum alloy 7055 was selected as a matrix. Composites reinforced with varying amounts of TiB2 particles were synthesized using the in situ method, and their mechanical properties and microstructure were analyzed. It is found that the in situ TiB2 particles sized from 50 to 400 nm uniformly disperse in the matrix. With the weight fraction of TiB2 particles increasing, the elastic modulus as well as the yield strength and the ultimate tensile strength increase, while the ductility decrease. The improvement of strength could be attributed to good bonding between TiB2 and the matrix, and also the TiB2 particles act as a barrier to dislocation.