Simultaneous Fluorescence Detection of Mercury(Ⅱ) and Silver Ions Based on Rhodamine B Isothiocyanate and 5-Carboxyfluorescein-ss DNA Modified Probe

A new fluorescence sensor is developed for simultaneous detection of Hg~(2+) and Ag~+. During the detection process,Hg~(2+) forms complexes with the fluorescent dye rhodamine B isothiocyanate(RBITC) modified onto the surface of gold nanoparticles(Au NPs),resulting in RBITC's displacement from the surface of Au NPs and the recovery of fluorescence. Meanwhile,Ag~+ forms “C-Ag~+-C” complex with C-rich 5-carboxyfluorescein(FAM)-ss DNA modified onto the surface of Au NPs,which keeps the fluorescent dye FAM close to the Au NPs and results in quench of fluorescence. The experimental results show a wide linear range and a good sensitivity. The limit of detection is 1.06 nmol/L for Ag~+ and 0.48 nmol/L for Hg~(2+). This detection method is not only easy to operate but also efficient.     

GPS测量代替常规水准的实践

重点介绍了ＧＰＳ测量代替常规水准实现高程控制的方法和措施。给出了用ＧＰＳ技术代替常规水准的数学处理模型，并通过几个实际工程测量实例进行了误差分析，证明该方法切实可行。     

用VC++实现铝电解槽电流分布的计算和仿真

针对铝电解槽建立物理数学模型。在欧姆定律和基尔霍夫定律的基础上，利用节点电压法和VC 的计算与绘图功能，编制友好界面，并对电解槽中的电流分布进行了计算和仿真。     

球形芽孢杆菌BS—1012产毒部位的研究

本文对球形芽孢杆菌 Bacillus Sphaericus BS—1012菌株的产毒部位进行了研究。结果表明:BS—1012菌株的伴孢晶体和芽孢对蚊幼虫具较高的毒力。营养体对蚊幼虫也有毒力,毒力强度低于芽孢和伴孢晶体。本文发现营养体在裂殖生长过程中能够产生并分泌到胞外的外毒素,这对于大规模生产时选用合适的剂型具有理论指导意义。     

SYNTHESES AND CHARACTERIZATION OF CYCLIC ORGANIC BORONATE ESTERS AS FLAME-RETARDANTS

Some organoboron compounds as flame-retardants for fiber materials were prepared.Flame-retarding properties of these compounds determined by the Oxygen-Index Method weregood.These new compounds were characterized by IR,~1H NMR spectrum and elementalanalysis.     

CIM环境下的自动化车间刀具管理系统

该文从ＣＩＭ　环境下自动化车间刀具流向入手，提出了一套建立自动化车间刀具管理系统的方法，并建立了自动化车间刀具管理的功能模型和信息模型。     

一种适于开环稳定系统的预测控制器

提出的新的预测控制算法,克服了目前应用较广泛的模型算法控制(MAC)在线计算量大及闭环极点难以配置等不足。仿真研究表明该算法对负载变化、随机扰动及非最小相位系统具有较强的鲁棒性。