新的基于条纹投影轮廓测量的系统标定方法

提出一种新的光栅条纹投影轮廓测量术系统标定模型,新模型不要求投影装置和成像系统的光心连线与参考面平行、成像系统的光轴垂直于参考面及投影装置和成像系统的光轴相交。基于该模型得出了新的相位高度映射关系,其待定系数与成像点的坐标无关。实际测量中只需2个高度不同的标准块便可以求得待定系数。对4个标准块进行高度测量,得到的最大相对误差为0.6%。实验证明:该标定方法简单有效,提高了系统标定的可操作性和测量精度。     

A new HPLC method of hydrophobicity evaluation employing poly (butadiene)-coated alumina columns

Summary The limitations of the existing methods and procedures of hydrophobicity evaluation by high-performance liquid chromatography are pointed out and a new approach is described allowing convenient, fast, and reproducible hydrophobicity quantitation for diverse basic, neutral, and acidic solutes of different chemical classes. The method is based on using poly(butadiene)-coated alumina developed by Schomburg and co-workers as the stationary phase which can be operated under wide range of eluent pH and which shows no tendency for specific interactions with solutes, typical for silica-based reversed-phase materials.     

Phénomènes transitoires au cours de la déformation plastique à chaud de l'acier

Sans résumé     

The highest D value for a Mn(II) ion: investigation of a manganese(II) polyoxometalate complex by high-field electron paramagnetic resonance

Using magnetization measurements and multifrequency high-field electron paramagnetic resonance, the largest zero-field splitting for any individual isolated Mn(II) ion has been found in a polyoxometalate complex, suggesting that the inorganic ligand induces large Ising-type magnetic anisotropy.     

基于彩色光栅投影的快速三维测量方法

 针对条纹投影术提取物体高度信息的问题,提出了一种新的基于彩色光栅投影的三维测量方法。对选取G分量为255,R,B分量各取0或255而组成的青、白、黄、绿四色遵循格雷码原理进行编码,然后将G分量作正弦调制形成投影光栅投向被测物体。提取采集到的光栅变形图中G分量,利用傅里叶变换方法得到其初始相位;同时对采集到图像中的R,B分量作阈值迭代分割而G分量自动赋值为255,综合三分量信息得到条纹颜色信息进而获取条纹的周期信息,从而展开相位。全过程仅需投影一幅彩色光栅图就能完成三维测量,实验结果表明该算法易于实现,在测量实时性和精确性上表现良好。     

诃子与川楝子配伍后挥发油化学成分分析

采用水蒸气蒸馏法将诃子与川楝子按1∶1的质量比配伍后提取挥发油,并用GC-M S联机技术对其化学成分进行研究,分离出249个组分,鉴定了其中的13个,主要成分有单[2-乙基己基]邻苯二甲酸、2,2′-亚甲基叔丁基对甲酚,乙基（2E）-3-[4-甲氧基苯基]-2-丙烯、7-甲基-Z-十四烯-1-醇酯。     

Volatile Compounds Present in Carbon Blacks Produced by Thermal Plasmas

Carbon black nanopowders were produced using two thermal plasma processes based on DC, respectively ICP plasma torches. Although the produced particles were in the nanometer size range, the values obtained for the surface area of the particles using a Brunauer Emmett Teller technique were very small. This indicated the presence of contaminants in the experimental powders, as confirmed by Raman spectroscopy and Thermogravimetric Analysis. A thermal treatment process was developed in order to extract these volatile compounds, which were then identified using a Gas Chromatography—Mass Spectrometry method. The experimental powders were analyzed using Scanning and Transmission Electron Microscopy, X-Ray Diffraction and Raman Spectroscopy before and after the thermal treatment in order to determine the effect of the heat treatment on the powder structural properties.     

Integration of fluorescence collection optics with?a?microfabricated surface electrode ion trap

We have successfully demonstrated an integrated optical system for collecting the fluorescence from a trapped ion. The system, consisting of an array of transmissive, dielectric micro-optics and an optical fiber array, has been intimately incorporated into the ion-trapping chip without negatively impacting trapping performance. Epoxies, vacuum feedthrough, and optical component materials were carefully chosen so that they did not degrade the vacuum environment, and we have demonstrated light detection as well as ion trapping and shuttling behavior comparable to trapping chips without integrated optics, with no modification to the control voltages of the trapping chip.