关于G/G/1排队模型中排队长度的积分

考虑了一个具有中度正则变化服务时间的G/G/1模型.假设Q(t)是排队长度,则在忙期[0,l]上,Q(t)下方所扫过的面积也具有中度正则变化的性质.     

Automatic identification of use cases from codes: A user’s goal driven approach

Based on the different roles played by base flow and alternative flow in the process to achieve user’s goals, we have found that loop structure is frequently used to implement alternative flow and/or to connect different use cases. This paper presents an approach to identify base flows and alternative flows of different use cases by traversing control flow graph in which back edges are eliminated. The effectiveness of the approach is verified by identification of the use case structure of an ATM system. The workload of human intervention of the approach is relatively slight, and the manner of human intervention closely follows the usual process of software comprehension.     

一种大管径煤气管道带压堵漏的应用

文章介绍了针对DN2200煤气总管泄漏,一种新型大管径煤气管道带压堵漏的性能和工作原理.     

国内高校人才培养模式发展趋势研究

从人才培养模式的定义出发,介绍了国内高校传统人才培养模式,总结了我国高校人才培养模式的发展趋势,认为不同的学校要根据自身的实际情况,结合社会需求构建科学的人才培养模式,形成自身的办学特色。     

省级实验示范中心在高校人才培养中的作用

对高校而言,实验教学是理论教学以及科研的基石,是深化理论知识,将间接经验与直接经验相结合的桥梁。论文结合安徽医科大学基础医学院病原与免疫学实验室的成长历程,阐述了省级实验示范中心在高校人才培养中的积极作用,体现在省级实验示范中心建设的引领下,实验中心本着提高实验教学水平和人才培养质量为目标,逐步实现提高实验室建设和管理水平,充分发挥实验示范中心的示范引领作用,以期全面提高高校的实验教学水平,并为高校进一步的实验教学改革创造条件。     

Secure and efficient elliptic curve cryptography resists side-channel attacks

An embedded cryptosystem needs higher reconfiguration capability and security. After analyzing the newly emerging side-channel attacks on elliptic curve cryptosystem (ECC), an efficient fractional width-w NAF (FWNAF) algorithm is proposed to secure ECC scalar multiplication from these attacks. This algorithm adopts the fractional window method and probabilistic SPA scheme to recondigure the pre-computed table, and it allows designers to make a dynamic configuration on pre-computed table. And then, it is enhanced to resist SPA, DPA, RPA and ZPA attacks by using the random masking method. Compared with the WBRIP and EBRIP methods, our proposals has the lowest total computation cost and reduce the shake phenomenon due to sharp fluctuation on computation performance.     

成年男性血小板正常参考值与地理环境的关系

为了给制定中国成年男性血小板正常参考值的统一标准提供科学依据,收集了中国100个单位测定的12670例成年男性血小板正常参考值,应用SPSS统计软件,运用相关分析和回归分析的方法,研究了其与7项地理因素指标的关系。     

Study of two-section composite chain of beads under vertical vibration

We investigated the dynamic properties of a two-section composite chain of beads under vertical vibration.By analyzing the chain’s motion,including phase-shift,mean dilation,center-of-mass displacement,and energy,we found that with different bead arrangements,the chain behaved in different ways.We believe that interaction existing at the interface between bead sections provides the underlying cause.This interaction causes different energy in different arrangements,which leads to different dynamic characteristics.     

Henon-Heiles体系的混沌控制

分析了不可积哈密顿系统混沌控制的LDG方法,并利用它实现了对Henon-Heiles体系周期1轨迹的混沌控制,通过实例分析了该方法的优点和局限性.     

山西农业生产结构的合理化研究

农业生产结构是一个多层次、多方面、多阶段的复杂的动态经济系统。本项研究借助于著名的罗伦茨曲线模型来提出一个数学定量指标和计算方法，以此来判断山西农业生产结构的合理化程度，并分析原因提出了相关的建议。