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In this paper, the first identity-based proxy signature scheme without random oracles is proposed based on Paterson, et al's identity-based signature scheme. The unforgeability of the proposed scheme is based on the hardness of the well known computational Diffie-Hellman problem.

利用Paterson等的基于身份的签名方案构造了一个基于身份的代理签名方案，并在标准模型下基于计算Diffie-Hellman假设证明了它的安全性。

The main results in this paper as follows: First, a prototype of a shape-based image database retrieval system is completed, it can receive the query mode both by giving an example image and by sketching the desired object on the screen, Second, five shape-based image retrieval methods are realized; Third, an algorithm based on triangulation for shape-based image retrieval is brought forward. In this algorithm, firstly, the edge of the original image is followed and the candidate corners in the original image are detected. Then the counterpoints of the candidate corners in the result of edge follow are found, and the boundary corners whose counterpoints have been found are queued in the order of their counterpoints in edge follow. After these steps, the boundary corners are triangulated and triangles are obtained which can show the true shape of the original image. Finally, shape feature is obtained by calculating the angle histogram of the triangles.

同时本文中主要完成了以下三方面的工作：完成了一个基于形状特征的图象检索的原型系统，可实现例子图象或徒手绘草图两种查询方式；实现了五种利用形状特征进行图象检索的具体方法，并对其进行了分析比较；并且在继承将三角剖分引入形状检索的思想基础上提出了利用三角剖分进行形状检索的一种新算法：先对原图象进行边界跟踪和角点检测；然后寻找初始角点在边界跟踪中的对应点，并对找到对应点的角点按其对应点在边界跟踪中的顺序进行排序；再对排序后的角点进行德洛内三角剖分，得到能表示目标真实形状的三角形序列；最后计算三角形序列的角度直方图作为形状特征，并进行相似性匹配。

Subsidiary, a total of four business segments: one is just listed kyoko resources, mainly the production of Glauber's salt-based; another one is based on the Proton in the heavy industry in Sichuan Xinjin mainly involved in special vehicles, bridge components, building machinery, new energy, petrochemical equipment industry, Hyundai Heavy Industries Company; third block is based on the production of new materials of special polymer-based PPS, in Shuangliu, Deyang has 31,000 tons production base, this piece of or will be available in September of this year; fourth block, then is the main oil-producing machinery and equipment company, is currently settled in places are being selected, which may be settled in Nanchong in Sichuan.

而腾中重工的母公司四川华通投资控股有限公司的实际掌门人就是李炎。在李炎控制的四川华通投资控股有限公司旗下，共有四大业务板块：一块是刚刚上市的旭光资源，主要以生产芒硝为主；另外一块是以四川新津的腾中重工为主，涉足特种车辆、道桥构件、建筑机械、新能源、石化设备产业的现代重工企业；第三块则是以生产PPS高分子特种新材料为主，在双流、德阳拥有3.1万吨产量的基地，这块或将于今年9月份上市；第四块，则是以生产石油机械设备为主的公司，目前落户地正在选择当中，可能会落户于四川南充。

In this dissertation, based on the systematically analysis of theory and application research on deformable model, a new B-spline active contour based on the finite element method is proposed; then B-spline active contour is applied to fitting the digital curve cross-sectional contour, and adaptive FEM is adopted to improve the precision; lastly the model is generalized to 3D, and a B-spline active surface model based on FEM is proposed.

本文在系统地分析了国内外关于可变形模型理论与应用研究的基础上，提出了一种基于有限元法的B样条主动轮廓模型；并将其应用于由断层图像导出的截面轮廓数字曲线的拟合，利用自适应有限元技术提高拟合精度；最后将其推广到三维，提出了基于有限元法的B样条主动曲面模型。

Contents include chapters on- Basic rules; Wild games based on five card stud; Wild games based on draw poker; Wild games based on seven card stud, Blockbusters; Odd games without wild cards; Four new wild card games; Best wild card games in brief.

内容包括各章的基本规则；野生游戏基于五个卡螺柱；野生游戏的基础上得出的扑克；野生游戏卡的基础上7螺柱，大片；奇数场，外卡；四个新的百搭牌游戏；最佳外卡游戏简短。

A safety level-based evacuation scheme of subway station is presented in this paper, with performance-based evacuation design combined. According to the evacuation characteristics of subway station, accidental evacuation time and available safety evacuation time under smoke control have been classified into three safety levels respectively. Then four safety levels have been proposed based on them. A flow chart of safety evacuation scheme of subway station under fire was then proposed based on the guidelines of safety evacuation and code for design of metro.

针对地铁车站人员疏散特点，以人员安全疏散准则和现行地铁设计规范为基础，融合了火灾安全工程学的性能化人员疏散设计思路，分别将事故疏散时间和烟控可用安全疏散时间划分为三个等级，综合形成了四类人员疏散安全等级标准，并在此基础上提出了框架性的基于安全等级的地铁车站火灾人员安全疏散方案设计流程。

Project construction is in the national spatial coordinate reference frame, based on the use of high-tech means of Geodesy, in Baotou city, the information on outcomes and quality of the original plane, gravity surveying and mapping information, etc. Based on the results, in accordance with unified planning and overall design principles, laid covering the city's domain sets plane, elevation, gravity field information based on the integrated control network formed by the geodetic datum, elevation and gravity reference base composed of high-precision, three-dimensional center of the earth and practical reference Baotou modern surveying and mapping system for the "Digital Baotou" construction and large-scale mapping projects such as surveying and mapping provides a unified spatial orientation reference.

项目建设是在国家空间坐标基准框架的基础上，利用大地测量的高新技术手段，在包头市原有平面成果资料和水准、重力资料等测绘成果的基础上，按照统一规划、整体设计的原则，布设覆盖全市域集平面、高程、重力场信息于一体的综合性基础控制网，形成由大地基准、高程基准和重力基准等组成的高精度、三维地心、实用的包头市现代测绘基准体系，为&数字包头&建设和大比例尺测图等测绘工程提供了统一的空间定位基准。

Based on the water environment spatial data mining and visualization method, the paper presents these main characteristics and innovations:①Measurement of contamination fluxes:A scene-based research strategy is proposed:measurement /water quality analysis→flow field simulation→contamination transformation rule→fluxes scene simulation→temporal-spatial rule analysis.②Serial numerical models of water environment in the Qiantang River:The controlled equations of the flow field model of the main river,united controlled equations of the main contamination fluxes and water quality prediction model at emergent time are set up.③GIS-based water quality and contamination fluxes decision-making assistance system:A water environment database has been set up;based on MapX and C#.net platform,a system has been developed to facilitate visual inquiry,decision-making and graphics export.

本文基于水环境空间数据挖掘与可视化的研究方法与体系，研究中的主要特色与创新点为：①河流污染物通量测算的技术与方法：提出了基于工况测量/水质分析→流场模拟→污染规律解析→通量情景模拟→时空规律分析的研究方案；②钱塘江水环境模拟系列数学模型：建立了钱塘江干流研究区域流场数学模型的控制方程、主要污染物通量模型的联合控制方程、突发污染事故水质预报模型的基本方程；③基于GIS的水质预报与污染物通量决策支持系统的研发：建立水环境时空数据库，基于MapX和C#。net平台进行系统的构建与开发，为研究的系列成果提供可视化的查询、决策与图形输出。

At first, in this paper the background and basic principle of VoIP are introduced; the much popular VoIP technology based on H.323 protocol is studied; based on the function and main working process of IP telephone system, the principle of coding of compression and transfer technology of the real-time voice are analyzed; depended on the existed experimental environment, the program of voice part of PC to PC video telephone terminal based on LAN is designed and implemented; and the problems encountered during the design of program have been analyzed and solved.

本文首先介绍了IP电话的发展简史，IP电话技术原理；对目前最为流行的基于H.323协议的VoIP技术进行了研究；根据IP电话系统的功能和主要实现过程，分析实时语音压缩编码技术和传输技术原理；利用实验室现有的实验环境，设计并基本完成了一种基于局域网的PC to PC可视电话语音部分的编程；并对程序设计过程中所遇到的问题进行了分析和解决。

Therefore, reviewing theory base on nationality ideas of Kodaly Zoltan, Karl orff and Emile Jaques-Dalcroze these three music education systems as a cut-in point, firstly use psychology, sociology and philosophy as basic theory to process macrocosmic comparative argumentation to three system music education ideas, then process microcosmic theoretic logic discursion to a few basic fields which influence sight singing and ear training course teaching aim, teaching content, teaching implementation and teaching valuation to confirm most correlative and effective information sources of teaching practice based on nation musicality of sight singing and ear training; once more describe actuality of teaching practice based on nation musicality of sight singing and ear training in our country and demonstrate these basic subjects (psychology, sociology and philosophy) with sight singing and ear training teaching relations and actual meanings of music teaching to further propose development direction and actual problems faced with teaching practice based on nation musicality of sight singing and era training in our country.

由于音乐学科教育学研究与哲学、美学、社会学、心理学、教育学、物理学、历史学、民族学等多种学科有着密切的联系和交叉，因此，从考察柯达伊、奥尔夫、达尔克罗兹(Emile Jaques-Dalcroze)三个音乐教育体系民族性理念的理论基础作为切入点，首先从宏观上对三个体系的音乐教育理念进行以心理学、社会学和哲学为基础理论的比较论证；继而从微观上对影响以视唱练耳课民族性教学的目标、教学内容、教学实施、教学评价的一些基本领域进行理论上的逻辑推理，确定与视唱练耳民族音感教学实践最相关的和最有效的信息来源；再对我国视唱练耳民族音感教学实践现状进行描述，论证这些基础学科与视唱练耳教学的种种关系及对音乐教学的实际含义，进一步提出我国视唱练耳民族音感教学实践所面临的具体问题和发展方向。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。