远程心电监测系统的研究

提出了一种以S3C2440处理器和嵌入式操作系统Linux为基础的远程心电监测系统,介绍了系统实现方法和软硬件设计。该系统能够对心电信号进行实时采集处理和显示,而且可以通过GPRS无线传输模块将处理好的心电数据发送到远程计算机,适用于医院、康复中心和户外监护,帮助医生诊断病人病情。     

山东蓝宝石的色源和改色研究

报道了山东蓝宝石的ＸＰＳ，ＳＩＭＳ的测试结果，基于成份分析，光谱测试数据及对改色处理结果的分析，作出了关于山东蓝宝石的色源解释。山东蓝－宝石含铁量明显偏高，Ｆｅ＾２＋－Ｔｉ＾４＋离子间的电荷转移及Ｆｅ＾２＋，Ｆｅ＾２＋离子对的电子跃迁这两种机制的迭加，是造成其色深，失透的基本     

Quantification of multiple bioagents with wireless, remote-query magnetoelastic microsensors

This paper presents a micromagnetoelastic sensor array for simultaneously monitoring multiple biological agents. Magnetoelastic sensors, made of low-cost amorphous ferromagnetic ribbons, are analogous and complementary to piezoelectric acoustic wave sensors, which track parameters of interest via changes in resonance behavior. Magnetoelastic sensors are excited with magnetic ac fields, and, in turn, they generate magnetic fluxes that can be detected with a sensing coil from a distance. As a result, these sensors are highly attractive, not only due to their small size and low cost, but also because of their passive and wireless nature. Magnetoelastic sensors have been applied for monitoring pressure, temperature, liquid density, and viscosity, fluid How velocity and direction, and with chemical/biological responsive coatings that change mass or elasticity, various biological and chemical agents. In this paper, we report the fabrication and application of a six-sensor array for simultaneous measurement of Escherichia coli O157:H7, staphylococcal enterotoxin B, and ricin. In addition, the sensor array also monitors temperature and pH so the measurements are independent from these two parameters.     

三种主流宽带小区接入方式的比较与研究

通过对ADSL、LAN、HFC三种宽带接入方式原理及实际应用范围,并从运营商和用户两个角度对宽带小区接入方式的优劣予以阐述.     

以头部为例的人体有限元几何模型重建的方法初步探讨

有限元是一种从微观角度出发解决宏观问题的方法。从发明之日起,有限元法在很多研究中都显示出了独特功能,尤其在生物力学及生物医学方面,为这两门交叉学科的发展和进步提供了方法上的保障,也为航天,医疗,制造业等领域科研问题的突破提供了新方法。本文介绍了有限元的发展和现状,并以头部为例介绍了人体有限元建模的几种方法,并对这些方法进行了比较,并展望了人体有限元建模未来的技术革新方向和应用前景。     

一种性能优越的二次时频分布

提出了一种新型的性能优越的二次时频分布核。通过对步进频率信号以及点频信号的时频分析处理,可以看到,这种核的时频分布比较于魏格纳分布以及Braham Barkat提出的分布,能更好地抑制交叉项;同时,这种核的频域分辨率与BD方法相当,而在时域上的分辨率则比它要更好。     

Preparation of monomer of degradable biomaterial poly（L-lactide）

1INTRODUCTION Polylactide,oneoftheimportantbiodegrada blematerials,whichhasfavorablebiocompatibility andabsorption[1],hasbeenusedinimplant,chor dasericachirurgicalis,drugcontrolledrelease,boneinternalfixation,tissueengineeringetc[25]. Thepoly(L lactide)(PLLA)withhighrelative molecularmasswasobtainedbyring openingpoly merizationatpresent.Thatis,firsttheintermedi ateproduct(lactide)wasobtainedfromlacticacid, thenthepoly(L lactide)wasobtainedfrominter mediateproductbyring openingpolymer…     

增压膨胀和全精馏无氢制氩技术在1000m~3/h空分设备上的应用

介绍采用增压膨胀和全精馏无氢制氩技术的1000m3/h空分设备的流程设计和技术指标,简述了安装调试中遇到的问题以及解决方法。     

Existing State and Partitioning of Rare Earth on Weathered Ores

The existing state and partitioning of rare earth （RE） on weathered ores in Longnan County（LN）, Xingfeng County（XF） and Ninghua County（NH） were characterized systematically by standard geological analytical methods. It is found that RE in the weathered rare earth ores exist as four phases： （a） water soluble, （b） ion-exchangeable, （c） colloidal sediment （oxides）, （d） minerals, in which mainly as ion exchangeable phase, accounting for nearly 80% of total RE, with about 20% in the form of colloid sediment phase and mineral phase, but very little as aqueous soluble phase. These rare earth partitioning were mainly chosen mid-heavy RE elements, occupying above 60%, but not equal in the four phases. The mid-heavy RE elements were primarily enriched in the ion exchangeable phase up to 40%, while the containment of cerium dioxide is below 2 %. The cerium deficiency occurs in the ion exchangeable phase in weathered ore. It results from that the Ce^3＋ is oxidized into Ce^4＋ and changes into CeO2. For LN ore, the containment of Y is high in weathered ore because Y-minerals are abundant in original rock.