Directional Analysis of the Chaotic Superlattice around the Equilibrium Point in the Phase Space

The recently proposed method of our research group named as directional Lyapunov exponents(DLEs) is presented. Then, DLEs are used to analyze the eigenstructure of the output phase space around the equilibrium points. Finally, the impacts of the superlattice parameter changes on the characteristics of the output chaotic signal are analyzed. The experimental results show that parameter changes of the superlattice will affect the eigenstructure around the equilibrium points in the output phase space, and DLEs are sensitive to these changes.     

中国沙棘扦插育苗中的几种处理方法对成活率影响的研究

采用不同的插穗长度、取穗部位及扦插基质等处理方法,进行了中国沙棘扦插育苗试验,以研究对其成活率的影响。结果表明:以插穗长度为16-20cm,取中上部位的枝条作插穗,育苗基质配比为大田土:泥炭:沙子=7:3:4的中国沙棘扦插育苗成活率较高。     

一键恢复在EDA实验室微机软件维护中的应用

EDA实验室软件系统维护，是实验管理的重要组成部分，直接关系到设备的有效利用和实验质量。采用一键恢复技术、独立于操作系统的多重引导和各种保护措施相结合，在不增加硬件，不影响整体性能的情况下，可向学生提供实用、方便、满足各种要求的计算机软件环境，减轻维护的工作强度，减少设备损坏，充分挖掘EDA实验室使用潜力。     

流式细胞光度术的初步建立——在MPVⅡ显微光度计基础上改装的流式细胞光度计

流式细胞光度术(Flow Cytometry)是六十年代末发展起来的一项新技术。它可以在细胞群体中对单个细胞逐个进行高速的定量分析和分类,从一个细胞中可同时测得蛋白质、DNA、细胞体积及核与细胞直径比例等多种参数,具有高速度多信息分析的特点,是研究细胞生物学、免疫生物学、体细胞遗传学、生物化学、肿瘤学的有力手段。目前使用的流式光度计基本上有两种类型:一种是以汞灯作光源,在落射光照明条件下,激发通过流动室的细胞悬液,测量细胞发出的荧光强度,另一种是以激光激发按重力方向流动的细     

Parameter analysis of chaotic superlattice true random number source

Superlattices in chaotic state can be used as a key part of a true random number generator. The chaotic characteristics of the signal generated in the superlattice are mostly affected by the parameters of the superlattice and the applied voltage,while the latter is easier to adjust. In this paper, the model of the superlattice is first established. Then, based on this model,the chaotic characteristics of the generated signal are studied under different voltages. The results demonstrate that the onset of chaos in the superlattice is typically accompanied by the mergence of multistability, and there are voltage intervals in each of which the generated signal is chaotic.