超声CT法无损测温

本文研究了测温用的超声ＣＴ算法，分析了测量精度和时间，运用两种迭代法讨论了声波受到人体内骨骼、空气阻碍时，投影数据缺损情况下的超声ＣＴ重建算法。文中还进一步研究了超声衍射ＣＴ；在卷积－反传播法的基础上，提出一种新的投影数据缺损时超声衍射ＣＴ算法，并给出了计算机仿真的结果。     

A study on nano-sized NiO electrodes doping with C and Co prepared by electrochemical deposition-sintering processes and their capacitance performance

In the present work, it was studied that nanoosized NiO electrodes doping with C and Co were prepared by electrochemical deposition in an ethanol solution containing nickel nitrate and cobalt nitrate and sintering processes. The capacitance performance of such electrodes was also studied. The results reveal that samples obtained by electrochemical deposition first on a porous nickel cathode in an ethanol solution contain 0.5 mol/L nitrates, in which Ni(NO3)2 and Co(NO3)2 were mixed in a molar proportion of 8 : 2. After sintering at 300℃ for 2 h, they exhibited the best performance. XRD analysis illustrates that the essential phase of the product is NiO doping with certain content of C and Co. The particles of product imaged a spherical morphology with sizes of 20---30 nm in diameter, and with an average crystal size of 4--5 nm. The capacitance measurement of the simulating C/NiO capacitors indicates that a single electrode can reach as high as 410.0 F/g, and still maintain the value of 323 F/g after 30 recycles showed as a stabilized value with increasing recycles, when it was discharged at a current of 5 mA.     

基于熵权重的喀斯特地区林业可持续发展评价方法

采用改进的层次分析法和熵权法进行了贵州省喀斯特地区林业可持续发展的评价研究.分析了两种方法的优缺点,并将层次分析法和熵权法的结果相结合,得到综合主客观因素的指标权重向量.结果表明:研究区内林业可持续发展总体水平由高到低依次为金沙县、清镇市、西秀区、六枝特区.     

基于单片机控制的微光应力源系统

微光应力系统是微光夜视仪可靠性检测设备中的重要组成部分,为检验夜视仪提供满足正常使用要求的光应力。文章介绍了对微光模拟环境的设备设计和Monte Carlo仿真,以及一种基于仿真软件Proteus的微光应力源控制系统的仿真应用。该系统以双积分球来分别模拟1.3×10^-1Lx、1.3×10^-2Lx、1.3×10^-3Lx、1.3×10^-4Lx照度的微光环境,同时使用单片机与一些外围器件相互结合起来,实现采用按键对步进电机的实时控制与显示步进电机工作方式。与此同时,系统采用C语言进行软件编程,并在Proteus环境下通过了控制系统的功能仿真验证。     

Lasing on pyroclastic rocks: A case study of <Superscript>40</Superscript>Ar/<Superscript>39</Superscript>Ar dating on Moshishan Group,eastern Zhejiang Province

It is difficult to date pyroclastic rocks, for almost all the dating methods, due to the multiple sources during their formation. ^40Ar/^39gAr incremental heating results on groundmass selected from the samples show that the age spectra are meaningless geologically. However, singe crystal total fusions of CO2 lasing on the sanidine separates could yield rational 4^40Ar/^39Ar results and distinguish their sources in this study. Timing on three formations of the Moshishan Group, after avoiding the exotic and altered grains by lasing on the single sanidine separate, was reported in this paper. The lowermost portion of the Chawan Formation gives an age of 113.7±0.3 Ma; the lower part of the Xishantou Formation was formed 116.4±0.4 Ma ago and the bottom of the Gaowu Formation took its shape at 118.4±0.4 Ma. These new ages are much younger than the previous ones, suggesting that these thick volcanic formations had been formed in very short durations.     

2012年秋季北京地区啮齿类实验动物健康状况的病理学调查和分析

随着现代科技的发展,实验动物在多方面起着越来越重要的作用。2012年10月,本实验室参与了北京市实验动物管理办公室组织的北京市啮齿类实验动物健康状况调查。采集心、肝、脾、肺、肾、大肠和小肠进行组织病理学观察,通过石蜡切片HE染色、冰冻切片油红O染色、PAS染色等方法对啮齿类实验动物的健康状况进行鉴定。结果显示,部分动物肝脏表现出不同程度的肝细胞肿胀、轻度肺脏病变,少数表现出肾脏管型、肾小囊腔蛋白样物质渗出和大肠寄生虫感染,但是啮齿类实验动物总体水平属健康状况。以上病变的出现可能与动物的生存环境、饲料营养成分和运输处死过程中的应激有关。     

微粒的夫琅和费衍射

本实验是用微米数量级的不透明颗粒与光的相互作用,产生小角度夫琅和费衍射和干涉图样,可以通过图样照片来测定微粒的几何结构。     

位相共轭及色散补偿孤子通信系统的误码率

终端位相调制及正色散补偿是光孤子系统中的一种新的传输控制技术，本文首次对系统参数对误码特性的影响进行了分析，发现恰当地选择系统的光纤色散参数，终端散补偿因子以及传输速率能使系统的误码率达到最低。     

BCO光度法测定含镍铝合金中的铜

针对ＢＣＯ光度法测定含镍铝合金中铜稳定性差的缺点,用ＮＨ３－ＮＨ４Ｃｌ溶液作为缓冲介质对ＢＣＯ法作了改进,测定含镍铝合金中的铜含量,结果稳定、准确,再现性良好,方法简便而实用,特别适用于炉前分析．     

含盐化工废液流化床焚烧特性试验

在燃煤循环流化床燃烧试验装置上对含盐化工有毒废液红水进行焚烧试验,考察了废液红水焚烧量、红水密相区喷入比例、过剩空气系数及二次风率等因素对焚烧试验炉内温度分布的影响.结果表明,在合理组织工况下炉膛主要焚烧区温度保持在850~900℃之间,焚烧效果好,床层没有出现结焦现象,尾部飞灰中析出微量有机盐分.随着红水焚烧量或过剩空气系数的增加,密、稀相区温度均下降;随着红水在密相区喷入比例或二次风率的增加,密相区温度下降,稀相区温度上升,炉温趋于均匀,更利于焚烧.