HPLC法同时测定血必净中多指标成分的含量

建立波长切换技术同时测定血必净中芍药苷、羟基红花黄色素A、阿魏酸含量的高效液相分析方法.采用Agilent Zorbax SB-C18柱（4.6mm×250mm,5μm）,以甲醇-0.7％磷酸水溶液为流动相,流速1.0mL·min-1,波长230nm（0-25min）、321nm （25-35min）,柱温30℃.所检测的3种成分线性关系良好,精密度、重复性、稳定性的RSD都低于2％.平均回收率分别为102.6％、100.6％、98.10％.该方法简便、准确、重现性好.     

Quantum watermarking based on threshold segmentation using quantum informational entropy

We propose a new quantum watermarking scheme based on threshold selection using informational entropy of quantum image. The core idea of this scheme is to embed information into object and background of cover image in different ways. First, a threshold method adopting the quantum informational entropy is employed to determine a threshold value. The threshold value can then be further used for segmenting the cover image to a binary image, which is an authentication key for embedding and extraction information. By a careful analysis of the quantum circuits of the scheme, that is, translating into the basic gate sequences which show the low complexity of the scheme. One of the simulation-based experimental results is entropy difference which measures the similarity of two images by calculating the difference in quantum image informational entropy between watermarked image and cover image. Furthermore, the analyses of peak signal-to-noise ratio, histogram and capacity of the scheme are also provided.     

基于机器视觉的麻将包装识别系统设计

针对麻将包装在实际产线上出现的麻将牌错位、缺失、牌面翻转等问题,基于机器视觉检测技术设计了一套以DM6437处理器为硬件平台的麻将包装识别处理系统。该系统的硬件部分由摄像头板、核心板和接口板三个模块组成,配合机械传动系统来进行识别前后麻将包装的传输。系统的软件部分采用平板Pad对麻将包装进行模板录入,并设计了一套适应于不同机箱内部环境变化的背景剔除方法来完成模板整体分割,以及通过中值计算实现单目标的分离,最后还提出了一种简单高效的混合搜索方式来进行基于SAD的模板匹配。测试结果表明,识别算法对于麻将间有缝隙、麻将整体倾斜、个别或整体麻将翻转、个别麻将位置错乱等问题均能准确判别,模板匹配算法稳定性和适应性较好,识别准确率达95%以上,能满足包装流水线上的缺陷检测。     

Lumped modeling with circuit elements for nonreciprocal magnetoelectric tunable band-pass filter

This paper presents a lumped equivalent circuit model of the nonreciprocal magnetoelectric tunable microwave bandpass filter.The reciprocal coupled-line circuit is based on the converse magnetoelectric effect of magnetoelectric composites,includes the electrical tunable equivalent factor of the piezoelectric layer,and is established by the introduced lumped elements,such as radiation capacitance,radiation inductance,and coupling inductance,according to the transmission characteristics of the electromagnetic wave and magnetostatic wave in an inverted-L-shaped microstrip line and ferrite slab.The nonreciprocal transmission property of the filter is described by the introduced T-shaped circuit containing controlled sources.Finally,the lumped equivalent circuit of a nonreciprocal magnetoelectric tunable microwave band-pass filter is given and the lumped parameters are also expressed.When the deviation angles of the ferrite slab are respectively 0° and45°,the corresponding magnetoelectric devices are respectively a reciprocal device and a nonreciprocal device.The curves of S parameter obtained by the lumped equivalent circuit model and electromagnetic simulation are in good agreement with the experimental results.When the deviation angle is between 0° and 45°,the maximum value of the S parameter predicted by the lumped equivalent circuit model is in good agreement with the experimental result.The comparison results of the paper show that the lumped equivalent circuit model is valid.Further,the effect of some key material parameters on the performance of devices is predicted by the lumped equivalent circuit model.The research can provide the theoretical basis for the design and application of nonreciprocal magnetoelectric tunable devices.     

HPLC法测定赤芍提取物中芍药苷的含量

建立了赤芍水提物正丁醇萃取物中芍药苷的含量测定方法.采用Diamonsil C18色谱柱（4.6mm×250mm,5μm）,以甲醇（A）-超纯水（0.2％的冰醋酸）（B） （30∶70,V/V）为流动相等度洗脱,流速：1mL·min-1;柱温：30℃;检测波长：230nm;进样量：10μL.赤芍水提物正丁醇萃取物中芍药苷的平均含量为1.52％.经正丁醇萃取后,提取物中芍药苷的纯度有了较大提高.所用含量测定方法简便准确,分离度好,可用于赤芍提取物中芍药苷的含量测定.正丁醇可用于赤芍中芍药苷的提取纯化工艺.