Toward Energy-Efficient and Trustworthy eHealth Monitoring System

The rapid technological convergence between Internet of Things(IoT),Wireless Body Area Networks(WBANs)and cloud computing has made e-healthcare emerge as a promising application domain,which has significant potential to improve the quality of medical care.In particular,patient-centric health monitoring plays a vital role in e-healthcare service,involving a set of important operations ranging from medical data collection and aggregation,data transmission and segregation,to data analytics.This survey paper firstly presents an architectural framework to describe the entire monitoring life cycle and highlight the essential service components.More detailed discussions are then devoted to {\em data collection} at patient side,which we argue that it serves as fundamental basis in achieving robust,efficient,and secure health monitoring.Subsequently,a profound discussion of the security threats targeting eHealth monitoring systems is presented,and the major limitations of the existing solutions are analyzed and extensively discussed.Finally,a set of design challenges is identified in order to achieve high quality and secure patient-centric monitoring schemes,along with some potential solutions.     

“至上”与“虚无”

<正>俄国画家马列维奇是"至上主义"抽象绘画流派的创始者,其绘画作品简约而纯粹,以最简单的形式——方块展现出艺术家丰富的感情世界,探索了形体、色彩与空间的关系。而同样善于运用几何形态的西班牙雕塑家奥泰萨的风格则显得冷静而克制,其雕塑作品通常看起来虚幻而抽象,没有强烈的情感表现,以高度理性化的手法展现出一种"虚无"的艺术境界。二人所专注的领域虽有不同,但他们的作品都在关注形式与其所在空间之间的复杂关系。     

Strain rate dependency and fragmentation pattern of expanding warheads

For the characterization of the behaviors of a metal material in events like expanding warheads, it is necessary to know its strength and ductility at high strain rates, around 104e105/s. The flyer plate impact testing produces the uniform stress and strain rates but the testing is expensive. The Taylor test is relatively inexpensive but produces non-uniform stress and strain fields, and the results are not so easily inferred for material modeling. In the split-Hopkinson bar(SHB), which may be used in compression, tension and torsion testing, the strain rates never exceeds 103/s. In the present work, we use the expanding ring test where the strain rate is 104e105/s. A streak camera is used to examine the expanding ring velocity, and a water tank is used to collect the fragments. The experimental results are compared with the numerical simulations using the hydrocodes AUTODYN, IMPETUS Afea and a regularized smooth particle(RSPH) software. The number of fragments increases with the increase in the expansion velocity of the rings. The number of fragments is similar to the experimental results. The RSPH software shows much the same results as the AUTODYN where the Lagrangian solver is used for the ring. The IMPETUS Afea solver shows a somewhat different fragmentation characteristic due to the node splitting algorithm that induces pronounced tensile splitting.     

距离无爪图的Hamilton性

距离无爪图类属于无爪图类。所谓距离无爪图是对图中的每个顶点,其距离为的邻域的独立数均不超过3的图。E.Bruce Shephed已证明:若G是距离无爪图且G是2—连通的,则G有Hamilton路;     

使用Windows中的录音机录制有背景音乐的文件

windows中的录音机,相信大家都见过,但很少有人使用,总觉得太简单了,但本人在一次使用中,却发现它有不少的功能,现与大家—起分享。 首先点击开始菜单,在程序中的附件里有个娱乐,录音机就在这里面。单击即可启动。出现录音机的窗口,接好麦克风后,就可以直接录音了。点击录音机程序界面中的录音按钮,然后打开你的录音机、收     

双级染料激光放大器泵浦能量分配的数值研究

用染料激光放大器的横向稳态泵浦理论，对不同的入射光能量选择不同的增益计算方法，研究了双级染料放大器的泵浦能量分配比例、泵浦光总能量和信号光能量大小对激光增益的影响。计算结果表明，对于其他参数确定的放大系统，存在着最佳的泵浦能量分配比例，可获得最大增益输出。通过自编程序的计算，可方便地找出特定系统泵浦能量分配比例的最佳值。     

内蒙古西部电网远景规划展望

内蒙古中西部地区是我国重要的煤电基地之一,根据国家的总体安排,该地区将实行输煤和输电并举,逐步向华北东北等地外送大量电力.本文结合蒙两地区远景电源发展规划设想,对2020年以前的送电方向、输电方式及送端主网架结构等进行展望和探讨,并提出了相应的建议.     

模糊控制在舰船操纵中的应用

本文根据舰船操纵特性，设计了适用于航迹保持及机动航行的双模模糊控制器，该系统具有结构简单，易于实现，实时性强等特点，防真结果表明其具有良好的控制性能。     

细观尺度的混凝土材料损伤

混凝土等建筑材料由于其本身的结构特性，在不受力的自然状态下就存在天然的损伤，如孔洞，微裂纹等。本文阐述了这类材料细观特征及塑性力学特性。采用多孔材料的GTN（Gurson-Tvergaard-Needlemen)模型本构方程，在变形梯度的乘法分解的基础上，推导和建立了细观力学分析的弹塑性有限变形计算方法，说明运用细观损伤力学方法分析是必要的和可行的。