情侣独钟的鸳鸯林

从去年春天开始,海内外很多传媒纷纷报道浙江省金华县大佛寺发现了鸳鸯林的奇闻。《信息导报》把它与杭州西湖的太子湾媲美,称“西湖畔有太子湾,大佛寺有鸳鸯林”;香港《皇岛日报》把它与金华火腿联系起来,说“金华不让火腿专美,鸳鸯树林游客称奇”;澳门《华侨日报》谓“大佛寺鸳鸯林,堪称华夏一绝”;香港《明报》提出“鸳鸯树林根连根,专家难解个中谜“鸳鸯     

容有m—维曲面族的QE（B^RP）流形的一些性质

本文拓广了ＱＥ流形，并研究了这类容有某种ｍ－维曲面族的Ｒｉｅｍａｎｎ流形的一些性质。进一步导出了在Ｒｉｃｃｉ对称及半对称条件下，这种拓广的ＱＥ流形为Ｅｉｎｓｔｅｉｎ或其法矢所满足的条件，以及一般情况下单位法矢为挠形场的必要条件。     

Grinding Characteristics Of Directionally Aligned SiC Whisker Wheel - Comparison With A12O3 Fiber Wheel

A unique SiC whisker wheel was invented, in which the whiskers were aligned normally to the grinding wheel surface. In this paper, grindabilities of the SiC whisker wheel are investigated and compared with those of other wheels of SiC grains, Al2O3 grains, as well as Al2O3 long and short fibres which were also aligned normally to the grinding wheel surface, respectively. The main research contents concern grinding characteristics of a directionally aligned SiC whisker wheel such as material-removal volume, wheel-wear rates, integrity of the ground surfaces, grinding ratios and grinding efficiency. Furthermore, grinding wheels of whiskers and fibres have a common disadvantage: they tend to load easily. The authors have proposed a simple method of loading-free grinding to overcome this propensity and investigate some related grinding characteristics under loading-free grinding conditions.     

“调研、演讲式”考试法有利于提高学生创新能力

“调研、演讲式”考试法经过五次试验，证明有利于提高学生综合素质。其优势表现在：增强学生学习主动性、知识和能力协调发展、形成创新性学习观、提高学生沟通能力和实务操作能力、杜绝考试作弊行为、教学相长。     

白灵菇接种技术

<正> 白灵菇又名翅鲍菇,是白阿魏蘑Plcurotus eryn-gii var.nebrodensis商品名称,是近年来我国北方地区发展热度较高的一个珍稀品种。但由于对其生长习性了解不够,栽培季节安排不当,不出菇现象经常发生,给种植者造成重大损失。为此,我们在省科技厅、省食用菌协会的安排下,我们进行了白灵菇     

几个二价稀土金属配合物的催化甲基丙烯酸甲酯聚合反应活性研究

研究了二价稀土金属配合物(η5:η1-C9H6CH2CH2CH2NMe2)2YbII(1),[{η5:η5:η1-(C9H5CH2SiMe2NC4H8)2}EuI2I(μ-Cl)]2[μ-η3:η5:η1:η3:η5:η1-(C9H5CH2SiMe2NC4H8)2].C7H8.(C6H6)0.5(2),and[η5:η1-C9H6CH2SiMe2NC4H8]2YbII(3)催化甲基丙烯酸甲酯聚合活性.探索了催化剂与MMA单体摩尔比、溶剂的极性、温度对MMA聚合反应的影响.     

中国风能产业发展现状及对策研究

风能是安全、清洁、充裕,能提供源源不绝,稳定的能源。风能产业的发展受到世界各国的高度重视,而且发展速度最快。本文结合我国风能发展现状,针对如何持续发展风能产业、如何培育风电市场、如何技术创新等问题进行了阐述并提出建议对策。