表面增强拉曼光谱法快速定量分析食品中福美双、二氰蒽醌和灭蝇胺的残留

基于表面增强拉曼光谱(SERS)技术,以Au@SiO2和Au纳米增强粒子建立了食品中福美双、二氰蒽醌和灭蝇胺的快速定量分析方法,3种农药的检出限分别为1.4μg/L、0.020mg/L和0.030mg/L。采用加标回收试验对方法进行评价,福美双在生活饮用水和碳酸梨汁饮料中的回收率在104.5%~107.1%之间,相对标准偏差为4.0%~6.2%;二氰蒽醌在生活饮用水中的回收率在81.1%~100.0%之间,相对标准偏差为4.1%~7.8%,灭蝇胺在碳酸饮料和果皮中测定的相对标准偏差均小于11.0%,结果表明该方法准确可靠,精密度高。方法成功用于加标碳酸果汁饮料、果皮表面二氰蒽醌及灭蝇胺的检测,为快速定量检测食品中农残提供了SERS方法。     

开拓创新 精益求精

<正>中国船舶重工集团公司第十二所标准物质研究室是国家冶金标准样品定点研制单位(证书号为:BKRK25-2009)和国家有色标准样品会员单位,拥有独特的金属材料标准物质均匀化制备技术优势,主要研制开发铸造金属材料光谱分析用标准物质和成分分析标准物质,广泛应用于兵器、航空、航天、船舶、冶金、机械等行业。北京、上海、沈阳、武汉、济南等全国各大城市均有代理销售单位。发展目标:成为中国金属材料标准物质制备基地及国防特种合金标准物质研究试验中心。     

基于网络技术的综合导航系统研究

通过对局域网的分析,提出了基于1553B数据总线技术综合导航系统设计方案,并对其可行性进行了充分论证,这种方案在很大程度上保证了系统的可靠性和实时性。     

NUMERICAL SIMULATION WITH A COMPREHENSIVE CHEMICAL TRANSPORT MODEL OF NITRATE, SULFATE, AND AMMONIUM AEROSOL DISTRIBUTIONS OVER EAST ASIA

The transport and chemical production processes of nitrate, sulfate, and ammonium aerosols over East Asia were investigated by use of the Models-3 Community Multi-scale Air Quality （CMAQ） modeling system coupled with the Regional Atmospheric Modeling System （RAMS）. For the evaluation of the model＇s ability in depicting their 3-dimensional concentration distributions and temporal variations, modeled concentrations of nitrate, sulfate, and ammonium aerosols are compared with the observations obtained at a ground station in Japan in March 2001 and onboard of an aircraft DC-8 on 18 and 21 March 2001 during the Transport and Chemical Evolution over the Pacific （TRACE-P） field campaign. Comparison shows that simulated values of nitrate, sulfate, and ammonium aerosols are generally in good agreement with their observed data, and the model captures most important observed features, and reproduces temporal and spatial variations of nitrate, sulfate, and ammonium aerosol concentrations reasonably well, e.g., the timing and locations of the concentration spikes of nitrate, sulfate, and ammonium aerosols are well reproduced, but large discrepancies between observed and simulated values are also clearly seen at some points and some times due to the coarse grid resolution and uncertainties of the emissions used in this study. This comparison results indicate that CMAQ is able to simulate the distributions of nitrate, sulfate, and ammonium aerosols and their related species in the troposphere over East Asia reasonably well.     

层合球面各向同性热释电空心球的瞬态响应

运用叠加原理，将层合球面各向同性热释电空心球的球对称动力学问题的解分成准静态和动 态两部分，准静态部分首先运用状态空间法给出了显式表达式，然后运用分离变量法、初参 数法和特征函数展开技术，给出了动态部分的表示式，再结合内外表面上的电学边界条件和 界面上的电学连续条件，导出一个关于时间函数的第二类Volterra积分方程，运用插值法 可成功地给出此积分方程的高精度数值解，最终可求得原问题的位移、应力、电位移以及电 势的响应. 此方法适用任意层数且各层是任意厚度的层合热释电空心球作用随时间以任意形 式变化的球对称温度场. 文中还给出了数值结果.     

电流变学研究进展

电流变学是近年来新兴的一门学科。本文从电流变学的发展概况，电流变流体，电流变效应的机理和电流变体的应用等４个方面对电流变学的概貌做了阐述，力求能准确地反映国际上电流变学的发展现状。     

应用于近距空空导弹惯导系统的传递对准技术

对应用于近距空空导弹捷联惯导系统的“长时”传递对准问题进行了讨论,分析了机载火控系统中建立“长时”惯性坐标系的原理和方法,并进行了长时传递对准卡尔曼滤波器的设计,在此基础上完成了初步的数学仿真.     

PARTICLE PROPERTIES—PROMISE AND NEGLECT

We see two major trends in Particle Technology. First, the focus is shifted from unit operations towards functional products, i.e. towards product engineering. Second, modeling will become more and more important. Processes cannot yet be designed from basic molecular understanding. Nanotechnology, however, begins to bridge this gap between molecules and particles and may thus open new ways not only for the production and handling of particulate matter but also for the engineered design of advanced material properties. Starting from the concept of product engineering we investigate the basic preconditions for tailoring nanoparticulate properties, i.e. the control of the particle interactions. Nanotechnology can only be transferred to industrial production if the interactions are effectively controlled. Material and particle properties are essential for predictive models. Although strong tools like MD, DEM or population balance models are available, these models are only predictive if realistic material and particle properties are available which is often not the case. We show for selected examples how particle properties can be obtained by studying the physically relevant elementary processes. The impact breakage behavior of many different materials is described by a master curve. Particle adhesion can be modeled if the roughness of particle and substrate and the Hamaker constant are known. The latter is obtained from adsorption studies.     

用于先进半导体制程的光刻反向计算技术(ILT)

此篇论文将介绍一个用于半导体光罩上图样设计以及可用于实际生产的光刻反向计算技术（ILT）。在论文中将讨论有关ILT的最新发展，包括在超成像极限协助图样（SRAF）的生成，可增加制程宽容度的ILT，以及如何生成满足光罩生产标准的图样等方面。从内部的研究结果和客户的使用结果可以看出，ILT已经不再只是一种用于研究的工具，而是已经可以用于先进半导体制程的大规模生产。在对各个环节优化之后，ILT可以增加制程的宽容度，同时将光罩的成本控制在可以接受的水平。     

飞机风挡结构抗鸟撞一体化设计技术研究

结合大型非线性有限元分析软件，实践了飞机风挡结构由初步设计、数值仿真以及实验验证的一体化设计过程，建立了适于风挡结构材料的非线性黏弹性本构计算接口程序，对合理选取单元类型、材料模型、边界条件影响以及试验设计等工作细节进行了深入研究，通过实验与仿真计算结果的对比，验证了数值仿真计算模型的精度．为飞机风挡的抗鸟撞结构设计-数值仿真-实验验证一体化技术提供了支持论证．