数字化指纹处理与比对方法的研究

利用数字图像处理技术,对模糊、变形、重叠、反差弱等效果差的现场指纹进行数字化处理后能获得理想的效果,可以提高现场指纹的利用率。在对指纹进行数字化处理的基础上,采用数字化指纹比对方法,实现了指纹比对的自动化、半自动化及远程化,并解决了一些疑难指纹的比对问题,大大提高了指纹比对的效率。     

浙江师范大学"十五"重大科技创新及产业化成果推介便携式警用滚动指纹采集处理机及系统研制

该项目主要是根据我国警方刑事侦察“向科技要警力．向科技要破案率”的实时需求研制的一种特殊的活体指纹三面滚动采集设备及软件比对管理系统，包括外置的台式大面积高分辨率指纹采集仪和便携式指纹采集处理比对一体机系统，由浙江省科技厅、教育厅、省长基金及国家公安部立项资助。该设备配有高分辨率图像传感器以及与其相匹配的高保真光学成像系统．使用多个传感器同通道的定时、同步技术．     

如何统一规范指纹中心点与外角点的定点

指纹中心点及外角点是在指纹存储、查档、通报、串并案及比对检验中经常用到的12个点。本文提出一套统一规范的指纹中心及外角点的定点方法。     

指纹自动识别系统使用方法和技巧

指纹自动识别系统采用先进的计算机算法,通过指纹检验鉴定的理论和工作经验,对现场指纹与指纹库中指纹逐一进行比对鉴别,提供候选名单,从而快速的进行筛选确认。虽然计算机可以自动的进行比对,但是,指纹特征标注的是否准确往往直接影响自动比对的结果,人工认定的过程也有一定的方法和技巧。该文从标记特征点、发送指纹查询、人工认定嫌疑人等三个方面,分别阐述了指纹自动识别系统使用方法和技巧。     

指纹自动识别系统实验课实施独立设课的构想

指纹自动识别系统,是公安刑侦工作中对指纹进行管理和鉴定的计算机系统。它的应用大大提高了案件侦破率。通过独立设课可加大对学生进行现场指纹和活体指纹的扫描、采集、输入、查询、分析比对实验教学,并通过仿真模拟试验让学生学习掌握指纹的远征比对、指纹大会战,网上追逃等现代公安信息技术,培养学生运用计算机进行贴近实战的物证分析、识别鉴定能力。     

浅谈Photoshop软件在指纹检验鉴定中的应用

指纹鉴定归根结底是一种对图像形态异同的观察和判断。在实践中,传统的指纹比对过程非常繁琐,费时费力,且容易操作失误。中文Photoshop软件是一种功能十分强大的计算机图形处理软件,此软件在对指纹图像的调整、放大、测量、对比观察、输入输出等方面较传统指纹比对都有其强大的优势。     

取款忘了密码创新发明帮你忙

银行卡太多，取钱的时候忘记密码了怎么办？别怕，你只要在这个输入器中提前预存密码，并记录该密码对应的指纹，取款时按一下识别指纹键，输入器的按键机构便会根据内部存贮的密码依次自动按键。这个名叫“高保密单键密码输入器”的发明，来自苏外l学生蔡明砀。     

指纹识别系统在实践中的应用研究

在刑事侦查工作中,要使指纹自动识别系统充分发挥它的破案效能,应注意做好以下几方面的工作:1)要保证捺印指纹采集存储质量;2)现场指纹的编辑要科学正确;3)现场指纹要按不同区域划分发送比对查询;4)要充分发挥捺印指纹重新编辑发送比对倒查的作用;5)现场指纹编辑应注意指位、纹型、三角、中心适度放宽;6)通过科学的人工干预提高查准率.     

数码相机在指纹自动识别系统中的运用

数码照相作为数码影像技术的具体运用，与传统的刑事照相相比，有着无法比拟的优越性，可利用其节省制作时间、直接与计算机相连的特点，方便、快捷地把所拍案件现场遗留指纹进入到指纹自动识别系统中进行比对。     

一种基于指纹中心点的匹配算法

针对基于点模式匹配的指纹匹配算法速度较慢的现状。研究了一种基于指纹中心点的指纹匹配算法．该算法首先根据指纹模式区中检测的奇异点结构特征信息对指纹进行粗匹配，判断指纹不匹配的情况．其次，对无法判断的情形，则进行精确匹配．进一步利用奇异点或指纹有效区域的质心点寻找匹配的基准特征点对和相应的变换参数，并将待识指纹相对于模板指纹做姿势纠正，最后采用坐标匹配的方式实现两枚指纹的比对．实验结果证明，该算法可以快速、准确的定位基准点，精确求取变换参数，误识率低，准确性高，并具有图像旋转平移不变性．对面积适中的指纹图像，匹配结果可以满足在线应用的需要．     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to