Multi-objective carrier chaotic evolutionary algorithm for DNA sequences design

DNA computing is a new vista of computation, which is of biochemical type. Since each piece of information is encoded in biological sequences, their design is crucial for successful DNA computation. DNA sequence design is involved with a number of design criteria, which is difficult to be solved by the traditional optimization methods. In this paper, the multi-objective carrier chaotic evolution algorithm (MCCEA) is introduced to solve the DNA sequence design problem. By merging the chaotic search base on power function carrier, a set of good DNA sequences are generated. Furthermore, the simulation results show the efficiency of our method.     

高校科研经费财务管理问题研究

随着高校科研项目的逐年增加和财政投入的不断增长,科研经费已经成为高校财务管理的重要内容.但在实际工作中,主要存在部门间管理相互脱节、核算办法不统一、管理手段落后、经费支出不合理、缺乏有效监督等问题.针对高校科研经费财务管理的现状和存在的主要问题,提出了加强部门间协作沟通、统一会计核算办法、构建信息管理系统、合理开支经费和完善监督检查制度等解决问题的发展对策.     

Spatial differences in rock uplift rates inferred from channel steepness indices along the northern flank of the Qilian Mountain, northeast Tibetan Plateau

The rate and distribution of deformation along the Qilian Mountain, on the northeastern Tibetan Plateau, is needed to understand the evolution of high topography associated with the plateau. Recently, a number of empirical studies have provided support for the contention, common to most models of fluvial incision, that rock uplift rate exerts a first-order control on the gradient of longitudinal river profiles. Along the northern Qilian Mountain, this method is used to extract information about the spatial patterns of differential rock uplift. Analysis of the longitudinal profiles of bedrock channels reveals systematic differences in the channel steepness index along the trend of the frontal ranges. Local comparisons of channel steepness reveal that lithology and precipitation have limited influence on channel steepness. Similarly, there is little evidence suggesting that channel steepness is influenced by differences in the sediment loads. We argue that the distribution of channel steepness in the Qilian Mountain is mostly the result of differential rates of rock uplift. Thus, channel steepness indices reveal a lower rock uplift rate in the eastern portion of the Qilian Mountain and a higher rate in the middle and west. The highest rates appear to occur in the middle-west portions of the range, just to the west of the Yumu Shan.     

高效疏水色谱法的新进展

本文着重对以硅胶为基质的高效疏水色谱法的理论、填料、流动相及应用的新近发展进行了评述。     

ERP系统实施风险及其防范

随着市场经济的发展,企业之间的竞争越来越激烈,企业迫切需要引入新的管理方法来提高竞争力,ERP系统作为国际上流行的企业管理系统.将信息技术与先进的管理思想集于一身,能为企业最大地创造财富,成为企业在现代社会生存和发展的重要基础.但是,ERP在为企业带来经济效益的同时也使企业存在一定的风险,文章对企业实施ERP系统可能面临的风险以及如何防范、控制风险进行分析阐述.     

论长管棚在隧道进出口段中的应用

文章介绍公路隧道所采用的长大管棚超前支护的施工技术,从设计参数、作用原理、施工工序、进度情况、质量控制几个方面作了具体介绍.     

用轴向浓度剖面拟合填料萃取塔轴向返混准数的方法

传统的萃取塔中的扩散模型均假设以轴向的体积传质系数为常数，本研究通过实验和分析文献的数据发现，作为填料萃取塔，轴向的体积传质系数是 ，而且塔底和塔顶相差较大，同时提出了体积传质胡轴向变化的扩散模型，并拟合出了模型的返混准数。     

非共沸混合物在强化管管束外冷凝的实验研究

对非共沸混合物Ｒ１１／Ｒ１１３在花瓣型翅片管管束外的全冷凝过程进行了实验研究，结果证实花瓣型翅片管能较好地强化非共沸混合物Ｒ１１／Ｒ１１３的冷凝以及管束效应很小。还讨论了平均冷凝传热系数与摩尔分数的关系。     

磁性超抗磁性和超导电性

本文主要讨论晶体中磁的对称性,晶体的磁性,超抗磁性和超导电性.     

常压下磁场对合成氨催化反应影响的研究

本文报导磁场对常压下合成氨催化反应的影响结果，得到了有关反应速率及转化率的变化规律，并改变磁场强度，找到了最佳场强范围，进而明确指出这种磁场效应源于磁场对合成氨催化剂的影响，对其可能的作用机制进行了初步讨论。