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。     

Near-optimal cumulative longitude low-thrust orbit transfer

The indirect method for the continuous low-thrust near minimum cumulative longitude orbit transfer problem is addressed. The movement of the satellite is described by the Gauss equation using the modified equinoctial elements and replacing time as the system independent variable by the cumulative longitude. The maximum principle is adapted to design the optimal control in order to minimize the final cumulative longitude, and the twopoint- boundary-value problem is derived from the orbit transfer problem. The single shooting method is applied in a numerical experiment, and the simulations demonstrate that the orbit transfer mission is fulfilled and the product of the maximal thrust and the minimum cumulative longitude is near constant.     

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.     

Three aspects on solving queuing service system in Shanghai world expo

This paper analyzes the queuing problem that was experienced during the Shanghai World Expo of2010.The queuing problem will be discussed at three levels.The three levels include the physical,psychological,and social aspects of the queuing problem.The collective behavior of visitors is studied through analyzing the information from the different sources,such as,the network of electronic eyes,the evaluation platform based on mobile phone system and the Internet.A hybrid information network technology is implemented.Based on the Wuli-Shili-Renli(WSR) system methodology,a new theoretical analysis framework for the queuing problem is proposed.     

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.     

CMOS数字集成电路I/O单元设计分析

按使用时焊点(PAD)排列方式的不同,CMC)S I/O库可分为两大类:直排式(inline)和交错式(staggered).以双向输入/输出单元为例详细介绍了一般CMOS I/O单元的主要组成部分及设计分析.其主要电路组成部分包括输出电平转换,输入/输出驱动以及静电保护,在工作频率要求较高时还应设计电源噪声抑制模块.电路设计配合一定工艺的spice模型进行仿真,根据仿真结果判断设计正确与否并进行优化.