王维《相思》“春”“秋”二字小考

王维《相思》是“秋来发几枝”还是“春来发几枝”历来颇有争议。本文试图通过这首诗版本演变过程的探究,说明应该是“秋来发几枝”。     

古诗《春晓》再解

《春晓》是唐代诗人孟浩然的作品,历代传唱不衰,对其解析可谓汗牛充栋,但大多定义其为山水田园诗歌,情感表现止于"伤春"说。然反复读之,都觉意味深远。诗中既有繁华落尽、青春不再的"伤春",亦有仕途坎坷、含恨山野的"伤己",还隐现了哀叹朝政、国势趋衰的"伤时"。     

双平行簧片结构弹性元件的抗扭转优化设计

针对现有的微摩擦磨损检测系统中采用双平行簧片结构作为微力弹性元件检测摩擦力,而其自身存在的扭转现象将会影系统响检测精度的现象,本文通过建立双平行簧片结构扭转力学模型性并结合有限元数值仿真软件,验证了扭转力学模型的可行性,研究双平行簧片的各结构参数对于其扭转现象的影响效果,并提出提高双平行簧片抗扭特性的优化方法。     

Biomineralization of phototrophic microbes in silica-enriched hot springs in South China

Microbial mats in two hot springs in South China were sampled for the research of mineralization of microbes and its mechanism by the methods of geology and modern biology. The results show that hot spring microbes have the key capability for enrichment of Si, Al, Fe, Ca and other elements, and the microbes are also crucial for the formation of SiO2, CaCO3, clay and so on. The extracellular polymeric substances (EPS) play important roles in the process of mineralization of hot spring microbes, which mainly takes place in the layer of EPS outside cell wall or sheath of cyanobacteria. The sheath outside cell wall, which keeps the normal metabolism of cyanobacteria during the process of mineralization on its surface, is also considerable for the biomineralization of cyanobacteria. According to structure and mineralization characteristics of two microbial mats, the process of mineralization can be divided into three stages, namely, early surface mineralization, middle degradation mineralization, and late des- quamation of mineral. The above conclusions are significant for comprehension of the process of mineralization, the process of deposition and the preservation of microfossil in modern and ancient extreme environments.     

具有SFD的转子稳态动力响应的运动方程

模拟小型燃气涡轮三盘非对称布置的转子,这种结构模型更接近于真实结构,但导致了理论分析的高度复杂性,推导了稳态动力响应的运动微分方程。     

基于SSH架构的J2EE（OA）的设计与实现

本文针对目前J2EE企业级应用开发中的一种流行的轻量级框架SSH,介绍了SSH框架开发的特点及要求,分析了SSH框架中各个开源架构关键技术的基本特征,阐述了如何更好地将三者整合起来以达到一个健壮、高效、易于维护与扩展的轻型J2EE架构,最终实现多层开发的低耦合,最后以OA系统开发为例,对其应用于OA的开发与设计进行了研究。     

基于ANSYS软件的钢筋砼间粘结滑移分析

钢筋混凝土是由钢筋和混凝土两种具有不同物理力学性质的材料组合而成的复合材料,其本构模型比较复杂.钢筋与混凝土两者之间的粘结滑移关系,虽然历经近百年的试验研究,对钢筋混凝土机理的认识水平日益深刻,但在有限元分析中还不是很完善.通过选用合适的材料本构模型和粘结滑移模型,建立有限元分析模型,从而进行全过程的模拟分析.     

春玉米优质栽培初探

本试验采用五元二次回归正交旋转组合设计,从农艺措施与春玉米品质的关系上进行研究。本文分析了设计因素的主次作用,提出了本地区高产条件下春玉米优质栽培的最佳农艺组合。为春玉米优质栽培提供了理论参考依据。     

The Application of Similarity Theory in Designing Large Deflection Buckling Spring-Piece

Large Deflection Buckling Spring-Piece (LDBSP) refers to the deformation of an end-fixed flat spring-piece under normal loadings. Plastic deformation usually appears in LDBSP.The static characteristic curve is very particular, because within its linear deflection region, the spring constant can be designed to be any value from minus to plus. With its obvious advantages of large liner deflection range, low spring constant, etc., the LDBSP has now been extensively applied to the exciting device, low-frequency shock absorbers and so on. The static characteristic curve of LDBSP belongs to the nonlinear problem of an arch with varying section. Therefore, it is difficult to obtain it theoretically. The formulae for designing LDBSP have not been set up yet. In this study,the authors apply similarity theory to analyze the liner deflection range A and the spring constant K, and derive the relationship of similarity criterion, finally obtain a set of formulae for designing LDBSP by model test and the least square method, which can be applied in engineering design.Through the research, it is proved that it is unnecessary to keep geometrical similarity of spring-piece shape. This fact extends the application scope of the formulae. The proposed formulae for designing LDBSP thereby can be applied for any dimensions within the range allowed.     

金佛山岩溶生态系统初步探讨--岩溶泉水化学特征分析

从岩溶水化学性质方面对金佛山岩溶生态系统作了初步的分析,选取了两个具有代表性的岩溶泉进行对比性加密观测,结果表明：不同海拔高度出露的岩溶泉水化学性质和岩溶强度存在较大不同;具有不同海拔高度的小鲵泉和双龙泉水化学性质随时间变化的稳定性出现较大差异。