凭海临风

浩瀚的蓝色是从小的梦,无垠的宽广是沉寂无底的深邃。午夜的歌声悬浮在海面,清唱的悠扬,如风的旋律。哪怕只是很短的一刻,在海的身边,就已足够。曾经固执地相信自己的故乡是海,只因为泪的味道与海水是如此相似,曾经固执地相信每一次悲伤,每一滴泪,都是故乡的呼吸。     

畅谈路亚经

谈到路亚(LURE)这个名词，相信许多钓友都不陌生，却不是每个人都玩过，原因当然来自于它那系出欧美的血统。     

浅议布朗运动的难点施教

我市1999年“精品课大奖赛”选择了“分子热运动”这节课作为主讲内容．竞赛中．在讲授关于布朗运动“悬浮颗粒越小，布朗运动越明显，悬浮颗粒越大，布朗运动越不明显以至观察不到”这一特点的原因时，参赛者的处理颇有不同．一种说法认为：悬浮颗粒受到液体分子的撞击作用是不平衡的，颗粒越小，质量越小，惯性越小，运动状态越容易改变，     

Single neuron network PI control of high reliability linear induction motor for Maglev

The paper deals with a new model of linear induction motor (LIM) to improve the reliability of the system. Based on the normal equation circuit of LIM considering the dynamic end effect, an equivalent circuit model with compensation of large end effect is constructed when the end effect force at synchronism is of braking character. The equivalent circuit model is used for secondary-flux oriented control of LIM. Single neuron network PI unit for LIM servo-drive is also discussed. The effectiveness of mathematical model for drive control is verified by simulations.     

过饱和度对纳米材料粒度的影响

粒径小，粒度分布均匀是高品质超细颗粒必须具备的基本特征，是制备纳米粉体材料过程中必须自始至终重点关注的问题。在液相法制备纳米材料时，要制备粒度小且分布均匀的纳米粒子，首先必先获得粒度小且分布均均的前驱体。影响前驱体粒度的因素很多，其中过饱和度是非常重要的因素之一，为此，实验从沉淀晶粒的形成、生长的基本原理出发，探索和解释了过饱和度对前驱体粒度大小的影吻。     

冬凌草细胞的悬浮培养研究

以冬凌草愈伤组织为实验材料,研究了培养基组分、接种量等培养条件对冬凌草细胞悬浮培养的影响,结果表明MS基本培养基附加2,4-D 1.0 mg/L,NAA 0.5 mg/L,Vc 0.1 mg/L,30 g/L蔗糖为最佳培养基。同时选择适宜的接种量和合适的摇床转速,能够建立起良好的冬凌草细胞悬浮体系。     

室内悬浮颗粒的分布规律研究

介绍了国内外对于室内悬浮颗粒分布规律的研究现状、所采用的研究方法，指出了目前研究中所存的不足以及需要改进的方面。     

Mathematical modelling of translational motion of rail-guided cart with suspended payload

In this paper modelling of the translational motion of transportation rail-guided cart with rope suspended payload is considered. The linearly moving cart,driven by a travel mechanism,is modelled as a discrete six degrees of freedom (DOF) dynamic system. The hoisting mechanism for lowering and lifting the payload is considered and is included in the dynamic model as one DOF system. Differential equations of motion of the cart elements are derived using Lagrangian dynamics and are solved for a set of real-life constant parameters of the cart. A two-sided interaction was observed between the swinging payload and the travel mechanism. Results for kinematical and force parameters of the system are obtained. A verification of the proposed model was conducted.