基于傅里叶功率谱的感光材料分辨率的客观测定

提出傅里叶功率谱法评价分辨率标板限分辨率值的理论判据。这是一种用光学信息处理原理对标板图案傅里叶谱进行分析处理的客观评价方法。文中建立了与分辨率标板图案相适应的傅里叶谱数学模型,并通过对傅里叶谱和理论计算和分析找也了标板图案分辨率值与功率谱图各次极大之间的关系。     

对薄透镜焦距测定实验的进一步研究

在薄透镜焦距测定实验的基础上，进一步讨论了折射反射系统成像的规律。     

质谱法测定多糖结构的机理研究

用气相色谱－质谱法对多糖的结构进行了测定，并着重对质谱法测定多糖结构的机理进行了研究。     

改进电热法测定比热容实验的研究

改进电热法测量比热容方法中使用的物理公式,使实验电路更为精简。在以往比热容测定仪器的基础上进行改良,制作出新的比热容测定装置,并通过实验验证该装置测定物质比热容所能达到的精确度。对实验的数据处理方法进行改进,并验证其精度。     

水的汽化热测定实验研究

介绍一种测定水的汽化热的实验方法，并对其测量原理作了讨论。该方法测量结果准确，方法简便。     

荧光光度法测定二氧化硫的基础研究

利用荧光光度法测定于氧化硫,研究其实验条件的变化对实验结果的影响,并确定它的响应范围。     

烟草制品中硫含量测定的研究

本文研究了在聚乙烯醇－乙醇介质中,硫酸根离子能和钡离子形成稳定的胶体沉淀,硫含量在０－１．０ｍｇ／２５ｍＬ范围内符合比耳定律,本方法稳定性明显优于传统的硫酸钡比浊法,与重量法无显著差异,用于烟草制品中硫的沉淀,结果令人满意。     

薯类中营养元素锌、钾的FAAS测定研究

研究了用火焰原子吸收光分光度法测定甘薯中的微量元素锌、钾的方法，采用高温温灰化法对样品进行处理，并对40多种不同品种和不同种植地区的甘薯进行了实样测定和含量差异比较。测定回收率在91．9％－108．0％之间。取得了令人满意的结果。     

光谱法测定黄磷中微量砷的研究

文章对测定黄磷中微量砷的各种光谱分析方法的研究进展作了综述,讨论了黄磷试样的处理方法和条件,重点讨论了Ａｇ－ＤＤＴＣ光度法,新银盐光度法,ＩＣＰ－ＡＥＳ法和原子荧光法在测定黄磷中微量砷的具体应用,对今后测定黄磷中微量砷的新方法的研究方向作一些探讨。     

光解催化光度法测定痕量钴的研究

本文提出了在Ｃｏ（Ⅱ）的催化下,草酸铁钾的光解反应产物Ｆｅ与邻菲罗啉生成的桔红色络合物的吸光度在一定的实验条件下与试剂Ｃｏ的含量０－２．８μ／ｍＬ呈良好的线性关系,从而建立了一种光化学－动力学测定钴的方法,本法灵敏度高,选择性好,用于药品ＶＢ１２和水中钴含量的测定。结果满意。     

液腔耦合高灵敏度压电陶瓷水听器

提出一种利用液腔模态提高接收灵敏度的压电陶瓷标量水听器,称为液腔耦合水听器。该水听器用径向极化的压电陶瓷圆管作为敏感材料,将圆管的外侧壁和上下端面屏蔽而仅使其内侧壁接收声压信号。用\     

Increasing the sensitivity of atomic absorption determination of iron

We have studied the effect of the nature and concentration of surfactants on the atomic absorption of iron. We show that using sodium dodecylbenzenesulfonate as the modifier in flame atomic absorption determination of iron in real samples makes it possible to make the measurements in a low-temperature flame (propane-butane-air type) with increased sensitivity and selectivity and also a lower detection limit for iron. We have developed a procedure for atomic absorption determination of iron in food products using sodium dodecylbenzenesulfonate as the modifier. The detection limit for iron is C_min = 0.008 μg/cm³. Report given at the International Congress of Analytical Sciences, ICAS-2006, 20–30 June 2006, Moscow, Russia __________ Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 74, No. 2, pp. 263–266, March–April, 2007.     

传声器次声段灵敏度校准的误差机理研究*

次声波广泛存在于自然界与人类活动中,由于次声波具有穿透能力强、衰减小等特点,隔离和消除十分困难,对次声的监测防护与利用成为人们关注的焦点。次声波的定量研究依托传声器的测量实现,对传声器的灵敏度原级校准是保证测量精度的前提。该文基于活塞发生器校准原理下的压力泄漏与热传导耦合衰减模型,在COMSOL多物理场仿真软件中对校准腔和传声器后腔内的声场特征进行了数值仿真。创新性地提出了模型比较法,准确量化了次声段校准核心的泄漏、热传导独立与耦合修正量,验证并揭示了声压泄漏与热传导损失的幅值与相位变化机理。进一步地对传声器的次声段灵敏度校准过程进行了联合数值模拟,仿真结果表明,内外均压校准声场下传声器灵敏度的幅相频响应存在明显差异,但与校准腔内的泄漏与热传导效应无关。基于搭建的活塞发生器原级校准平台对传声器系统进行了原级校准,通过实验手段初步揭示了内外均压校准机制下传声器幅值灵敏度与相位灵敏度的显著差异。     

关于光纤水听器灵敏度的讨论

本文先简略介绍了干涉型光纤水听器的基本原理与检测信号的基本方法，由此给出了光纤水听器相位归一化灵敏度、相位灵敏度、电压灵敏度的定义。在分析它们的物理意义以及相互之间关系的基础上，给出一组能反映它们对应关系的一组数据，以及一光纤水听器探头频率响应曲线。     

Development of copolymer of CR-39 with high sensitivity to low let particles

Several types of copolymers of CR-39 were prepared to find its usefulness as a nuclear track detector of high sensitivity. Track responses of these copolymers were investigated by irradiating energetic ions from proton through Ar. The copolymer of CR-39 monomer with N-isopropylacrylamide (NIPAAm) shows higher sensitivity than that of pure CR-39 for low LET particles such as protons. Preliminary results are reported for the track responses of copolymers (CR-39/NIPAAm) with various contents of NIPAAm as well as the etching properties.     

具有大指向性开角及高发射电压响应的发射换能器

应用复合变幅杆及夹心式换能器结构,研制了一种指向性开角较大且发射电压响应较高的发射换能器。应用有限元方法对换能器的工作频率,发射电压响应及指向性进行了理论计算。并与实验结果进行了比较,结果较吻合。本文研制的换能器工作频率为75.6kHz,发射电压响应级达到1 56dB(基准值1V/μPa),-3dB发射指向性开角100°     

Proton response of high sensitivity CR-39 copolymer

We studied the track response for the copolymer of CR-39 monomer with N-isopropylacrylamide (NIPAAm) as well as etching properties. It was found that copoly (CR-39/NIPAAm/Naugard 445) composed in wieght ratio of 99/1/0.01 is highly sensitive to low LET particles in the region below 10 keV/μm of LET and able to record normally incident particles of LET down to 1.5 keV/μm, recording protons up to the energy of 27 MeV. These results were compared with the responses for two types of CR-39 detectors containing a small quantity of antioxidant. The threshold energy proton registration is discussed.     

A novel sensitivity model for short nets

For modern processes at deep sub-micron technology nodes, yield design, especially the design at the layout stage is an important way to deal with the problem of manufacturability and yield. In order to reduce the yield loss caused by redundancy material defects, the choice of nets to be optimized at first is an important step in the process of layout optimization. This paper provides a new sensitivity model for a short net, which is net-based and reflects the size of the critical area between a single net and the nets around it. Since this model is based on a single net and includes the information of the surrounding nets, the critical area between the single net and surrounding nets can be reduced at the same time. In this way, the efficiency of layout optimization becomes higher. According to experimental observations, this sensitivity model can be used to choose the position for optimization. Compared with the chip-area-based and basic- layout-based sensitivity models, our sensitivity model not only has higher efficiency, but also confirms that choosing the net to be optimized at first improves the design.     

高度自动化获取书籍扫描图像畸变参数的理论

提出一种利用打印直线获取书籍扫描图像畸变校正所用参数的新方法,可提高畸变参数获取的自动化程度。对于打印在纸张上的直线,当打印纸夹在书籍中扫描图像时,打印纸随着书籍页面弯曲成曲面,它也随之弯曲成空间曲线,其扫描图像则为平面曲线,包含了页面弯曲状态的信息。理论上分析了该平面曲线与畸变参数之间的关系。利用这种关系及最小二乘法原理,对该平面曲线上的点进行曲线拟合,可自动计算出对应页面的畸变参数,不再像以前那样必须进行人工调整。