情报服务与高等院校科技成果转化

阐述了高校科技成果转化的模式和需要经过的四个发展阶段,对科技成果转化中的障碍进行了分析,并对图书馆在科技成果转化时,要提供的情报服务问题进行了探讨.     

身份认同与左翼身份的确立——关于丁玲“向左转”问题的解剖

运用身份认同理论,再度思考与重新阐释了丁玲三十年代初“向左转”问题的复杂性。揭示了丁玲小说创作“向左转”的现象是与其“左翼身份”的确立密切相关的;分析了以往研究中存在的种种思想雾障;得出了丁玲“向左转”是其社会认同与自我认同合力作用促成的结论。     

三律之音分解

音律是指乐音音高的准确高度及其相互关系,是人们在长期的社会生活实践中对大自然无穷尽谐音列体系(Harmonic tone series)认识的结果。音分(cent)是描述、记录音律最为方便、准确的方法之一。本文以音分为手段,穷尽各种算法,对三律之五度相生律、十二平均律、纯律中各律十二音共同音分值结果罗列出了多种计算方法,且对三律之总的生律方法、运算共性做了十三种解读,力图通过多种解算思维,有助于实践律学在乐器制造、乐器调律与实际演唱演奏中得到开发运用。     

Steam as coolant and lubricant in turning of metal matrix composites

Green cutting has become focus of attention in ecological and environmental protection. Steam is cheap, poilution-free and eco-friendly, and then is a good and economical coolant and lubricant. Steam generator and steam feeding system were developed to generate and feed steam. Comparative experiments were carried out in cutting AA6061-15 vol.% SiC （25 p.m particle size）, with cubic boron nitride （CBN） insert KB-90 grade under the conditions of compressed air, oil water emulsion, steam as coolant and lubricant, and dry cutting, respectively. The experimental results show that, with steam as coolant and lubricant, gradual reduction in the cutting force, friction coefficient, surface roughness and cutting temperature values were observed. Further, there was reduction in built up edge formation. It is proved that use of water steam as coolant and lubricant is environmentally friendly.