基于安卓平台的糖尿病监护系统的研究及实现

基于目前针对糖尿病的研究主要集中在健康管理及血糖浓度监测方面,在糖尿病病情控制方面并不乐观的现状,设计开发了一套能够实时监护老年患者注射药物情况的远程家庭医疗系统。该系统由智能检测硬件系统,手机客户端和WEB信息管理端组成,不仅可以解决独孤老人时常忘记注射胰岛素的问题,也有利于解决我国老年患者糖尿病监护难的问题,同时也能提醒青壮年实时携带注射针剂盒,缓解糖尿病并发症的发生。通过实时实验测试,该糖尿病监护系统可靠、稳定,且具有良好的实际应用价值。     

基于反应力场的分子动力学方法研究氢在钯表面的分解

基于二阶矩近似反应力场方法构建的全维度势能面研究了氢分子及其同位素分子在钯表面的分解过程.在构建势能面的过程中数据库中只包含了氢分子与钯（111）表面相互作用的相关信息,该势能面在研究氢分子在钯（100）表面上的分解过程中表现出了非常好的可转移性.结果表明,氢分子及其同位素分子在钯（111）与钯（100）表面上的分解系数S₀均随着入射能量的增加呈现非单调变化,并且通过固定分子取向的方法发现同核分子（H₂、D₂和T₂）最有利分解取向角为90°,而异核分子（HD、HT和DT）受质心偏移的影响,其最有利分解取向角向大角度偏移.     

类铍铝离子的Kα跃迁特性研究

我们报道了类Be的Al X最低40个能级的能级精细结构.利用基于多组态Dirac-Fock方程,我们给出了类Be的Al X的K_α跃迁的能级,波长,振子强度和能级寿命.研究表明,当前所得的理论计算结果与实验值以及其它理论值符合很好,同时对于分析已有的实验结果和指导拟开展的实验也有一定的意义.     

二氧化碳分子离子经由Ã2Πu1/2电子态振动能级共振的光解动力学：一项时间切片离子速度成像技术研究

We report on the photodissociation dynamics of CO₂⁺ via its òΠ_u,1/2 state using the scheme of [1+1] photon excitation that is intermediated by the mode-selected òΠ_u,1/2( u1,u2,0) vibronic states. Photodissociation fragment exciation spectrum and images of photofragment CO⁺ have been measured to obtain reaction dynamics parameters such as the available energy and the average translational energy. Combining with the potential energy functions of CO₂⁺, the dissociation mechanism of CO₂⁺ is discussed. The conformational variation of CO₂⁺ from linear to bent on the photodissociation dynamics of CO₂⁺ is verified.     

基于PLC与ZigBee的室内环境监控系统设计

环境监测点位具有分布范围广、点位多等特点,建立一套基于无线传感网络的环境实时监控系统,实现对区域内环境要素的在线监控,对及时掌握环境状况及有效控制环境污染的扩散有着直接而重要的作用;以CC2530芯片为核心构建ZigBee无线传感网络,并通过主控制器PLC将采集的数据进行分析与处理;利用主协调器及PLC将接收的监测数据传至上位机进行实时显示,由监控平台,结合红外收发器完成对外部设备的远程控制;上位机采用Wincc组态软件,结合西门子精智面板提供优异的人机交互界面体验;通过实验测试表明,该系统可实现大范围的室内环境参数的采集和传输以及远距离监控功能,且具有安装方便、扩展性强等特点,适用于需进行统一管理的智能楼宇建筑。     

基于磁偶极子构造法几何建模的铁管磁异常正演

地下铁磁性金属管线受地球原磁场磁化产生磁场会改变原地磁场分布,而形成地磁异常;通过管道几何建模和磁偶极子构造法对管道磁异常进行正演分析;首先利用近似的立方体单元对管道进行几何建模并输出相应的立方体单元体积和中心坐标;然后将立方体单元近似为磁偶极子,使用磁偶极子构造法进行管道磁异常正演;最后研究了距径比,磁倾角,磁偏角,地球场强,管道材料磁化率对管道磁异常正演的影响;研究结果表明:在6倍距径比外,同一球面上测点磁异常值接近一致, 且管道磁异常正演结果不受磁倾角,磁偏角和材料磁化率的影响;随着地磁场强度增大,管道磁异常呈线性增大;研究成果将为自主研发高精度磁异常地下管线探测设备奠定理论基础。     

基于密度泛函理论的叶绿素A性质的研究

在液相环境中,采用密度泛函理论(DFT)、含时密度泛函理论(TD-DFT)、Multiwfn波函数分析软件,在pbepbe/6-311g(d)基组水平上,计算并分析了叶绿素A的结构、紫外光谱和电子—空穴分布,结果表明:pbepbe/6-311g(d)方法是计算叶绿素A紫外吸收光谱更精确的方法;叶绿素A分子的吡咯环与取代基相互作用的过程中,吡咯环Ⅳ受侧链"尾巴"的影响最大;理论计算的紫外光谱与实验数据吻合较好,其中635.71 nm和446.87 nm处的两个吸收峰可认为是叶绿素A的特征吸收峰;侧链或取代基团在叶绿素A激发过程中是给电子体,卟啉"头"既是电子供体,也是电子受体.     

Circumferential and longitudinal defect detection using T(0,1) mode excited by thickness shear mode piezoelectric elements

Different kinds of defects, such as corrosions, notches and cracks etc, exist in pipes. Mode choice is important since unfortunately not all ultrasonic guided wave modes are suitable for these kinds of defect detection. T(0,1) mode which is non-dispersive is the lowest and fastest torsional mode and most suitable for defect detection in pipes. Two completely different artificial defects including longitudinal and circumferential defects are processed successively in a 4-m-long, 60-mm-OD, 3.5-mm-wall steel pipe. T(0,1) mode at 45 kHz is excited to detect these defects using thickness shear mode piezoelectric elements. Experimental results show that two kinds of defects are detectable using T(0,1) mode. Comparing with longitudinal modes, torsional modes are dominant in pipe inspection for their sensitivities to different kinds of defects.     

Grain-boundary physics in polycrystalline CuInSe2 revisited: experiment and theory

Current studies have attributed the remarkable performance of polycrystalline CuInSe2 (CIS) to anomalous grain-boundary (GB) physics in CIS. The recent theory predicts that GBs in CIS are hole barriers, which prevent GB electrons from recombining. We examine the atomic structure and chemical composition of (112) GBs in Cu(In,Ga)Se2 (CIGS) using high-resolution Z-contrast imaging and nanoprobe x-ray energy-dispersive spectroscopy. We show that the theoretically predicted Cu-vacancy rows are not observed in (112) GBs in CIGS. Our first-principles modeling further reveals that the (112) GBs in CIS do not act as hole barriers. Our results suggest that the superior performance of polycrystalline CIS should not be explained solely by the GB behaviors.     

Effects of SnO2 addition on the magnetic properties of manganese zinc ferrites

SnO₂ was added to high-permeability MnZn ferrites and MnZn ferrites for high-frequency power supplies. The effects of the SnO₂ addition were studied. Sn⁴⁺ ions can dissolve into the spinel lattice and form stable Fe²⁺–Sn⁴⁺ pairs and hence can compensate the magneto-crystalline anisotropy constant K₁ and improve the initial permeability effectively. The initial permeability of ferrites is also improved as abnormal grain growth caused by ion vacancy is controlled with SnO₂ doping. In addition, the SnO₂ doping also leads to a decrease in the relative loss factor and an increase in density. The power loss and minimum power loss temperature decrease with SnO₂ doping.