白鲜皮饮片标准汤剂质量评价体系构建

为了提高白鲜皮配方颗粒的质量标准,采用15批白鲜皮饮片标准汤剂,建立了质量评价体系。第1次加入10倍的水、浸泡30 min、煎煮20 min,第2次加入8倍的水、煎煮15 min,以标准化工艺制备标准汤剂,采用HPLC法测定黄柏酮和梣酮的含量及指纹图谱。结果显示:15批白鲜皮标准汤剂中黄柏酮的转移率为25.08%~44.08%,平均转移率为34.79%,标准偏差为5.37%;梣酮转移率为22.63%~32.86%,平均转移率为27.94%,标准偏差为3.56%;出膏率为20.56%~34.42%,平均出膏率为29.05%,标准偏差为3.33%。采用中药指纹图谱相似度评价系统进行指纹图谱测定,得到共有峰10个,指认出白鲜碱、黄柏酮、梣酮3个峰。由此可知,白鲜皮饮片标准汤剂的制备工艺规范,样品质量稳定,指纹图谱相似度大于0.92,可用于白鲜皮配方颗粒的质量控制,并为白鲜皮饮片标准汤剂的应用和其他根茎类饮片的研究提供参考。     

矿井人员指纹识别定位系统设计方案及应用

通过计算机技术对人员定位系统和指纹验证系统进行联网合并,利用指纹验证系统做到人卡合一,核实下井人员真实身份,最大限度的减少不经培训人员或弄虚作假的人员违规下井,确保矿井安全生产。     

Using semantic fingerprinting in finance

Researchers in finance and adjacent fields have increasingly been working with textual data, a common challenge being analysing the content of a text. Traditionally, this task has been approached through labour- and computation-intensive work with lists of words. In this article we compare word list analysis with an easy-to-implement and computationally efficient alternative called semantic fingerprinting. Using the prediction of stock return correlations as an illustration, we show semantic fingerprinting to produce superior results. We argue that semantic fingerprinting significantly reduces the barrier to entry for research involving textual content analysis, and we provide guidance on implementing this technique.     

论模糊指纹的鉴定

指纹鉴定结论是诉讼中最广泛存在的物证之一。然而指纹由于其形成受到各种因素的影响，常常表现为模糊、变形、残缺不全，影响并增加鉴定难度。本文旨在研究模糊指纹的特点及形成原因，并分析模糊指纹的鉴定条件和方法，以期最大限度挖掘模糊指纹的鉴定价值和证据潜力。     

浅议公安指纹档案的开发与利用

最大限度地开发挖掘指纹档案信息资源,才能为提高工作效率、降低工作成本创造有利的条件,本文从加大指纹档案硬件建设、加强指纹采集、完善指纹管理运行机制等方面对指纹档案的开发与利用进行了探讨。     

Fingerprint‐Based Recognition

Biometric recognition, or biometrics, refers to the authentication of an individual on the basis of her or his biometric traits. Among the various biometric traits (e.g., face, iris, fingerprint, and voice), fingerprint‐based authentication has the longest history and has been successfully adopted in both forensic and civilian applications. Advances in fingerprint capture technology have resulted in new large‐scale civilian applications (e.g., US Visitor and Immigrant Status Indicator Technology program). However, these systems still encounter difficulties due to various noise factors present in operating environments. There is also a general lack of scientific development in forensic methods, including fingerprint‐based methods, in terms of identifying, incorporating, and quantifying sources of variability in the decision‐making process. The purpose of this article is to give an overview of current practice in fingerprint‐based recognition, its challenges, and areas of future research.     

Migration to 3G wireless broadband internet and real options: The case of an operator in India

The paper focuses on third generation wireless technologies and on alternative technologies for wireless local area networks. The authors present the evolutionary migration path from second to third generation systems. Technological, economic and behavioral factors related to decision-making towards the migration are proposed. As an example, the paper studies the case of the national incumbent operator of India. It analyzes qualitatively the migration problem from the perspective of the operator, the equipment manufacturer and the users. For the quantitative analysis, real options are used to value the investment decisions. The analysis suggests that the initial (sunk) investment cost, the average revenue per user, the growth of the subscriber base and the volatility of the markets are the key factors in the investment process.     

局域网负载均衡应用与研究

本文介绍了局域网Internet出口智能负载均衡系统的实现方法以及强大的优势，在未来的企业信息化的建设中，负载均衡技术将会发挥更大的作用。     

基于宽带接收的星载信号处理技术

分析了卫星有效载荷信号处理需求,提出了基于宽带接收的星载信号处理技术 流程,针对星载硬件资源有限和需要实现对重点信号搜索匹配的要求,同时考虑到宽带接收 时接收灵敏度较差等问题,给出了适于星载实现的多信号分离、低信噪比下调制识别和辐射 源细微特征提取方法,通过仿真验证了算法的有效性。     

基于气相色谱技术的酱香型白酒有机质特征指纹分析方法优化研究

本文从白酒成分出发,结合不同现代仪器分析手段的特点,选取了一种针对白酒有机质组分进行特征指纹分析的方法,从酱香型白酒入手,对白酒的研究现状、检测手段、实验方法(预处理方法、色谱条件、色谱柱的选择)进行分析,将不同检测手段和实验方法进行横向对比,为特征指纹分析方法的建立提供了理论依据,并为白酒品级和种类的鉴别提供了一种新思路。