不可实现的

Firstly, the research studies the coding rule of the PDF417 barcode and designs related computer code algorithm, with making it programmed, and completes the coding part of the system software. Next, the coding and decoding principle of Reed-Solomon error-correcting code is briefly introduced. According to thecoding and decoding principle in galois field GF(929), to analyze and study its practical application with emphasis in this topic. Then, the PDF417 barcode decoding process is analyzed and studied detailed according to the barcode coding principle, with the corresponding realization method designed, improving the design in theory aspect by using material example, at the same time programming the design method to complete the decoding part of the system. Finally, validated the system program in the practical application of image information aspect, by using the nonrepeatability and the randomicity characteristic of Julia mark shape artwork.

本课题首先研究PDF417条码的编码规则并设计相关的计算机编码算法使其程序化，完成系统软件的编码部分；其次，简要介绍Reed—Solomon错误控制码的编码与译码原理，在伽罗瓦域GF(929)内根据其编译码的原理重点分析与研究其在本课题中的实际应用；然后根据条码的编码原则对PDF417条码的译码过程进行详细的分析与研究，并设计出相应的实现方法，利用具体实例对设计方法进行理论方面的实践同时将设计方法程序化完成系统软件的译码部分；最后利用Julia集分形图形的不可重复性和随机性的特点对系统软件在图像信息方面的实际应用进行了验证。

Now day's main competitions are the competition of technology and intelligence.But all these are attributed to the best use of its potential.Hence,how to realize this has become amajor subject.While the most complicated and difficult factor is how to encourage employees and give fuel play of their potentials.Since the policy of opening the country up to the world,the payment reform for the material promotion has been anot topic.But heather can give full play of the payment encouragement only on the basis of material promotion,which has ravishingly aroused people's consideration.However,no doubt,one of the main secrets for the sustainable development of an enterprise is to establish areasonable and effective payment system to basically ensure the sup erior competition of human resource and turn it into the advantage of market competition.

企业赖以生存和发展的基础可以概括为五种资源：资金、财产、技术、信息和人力，在这五种资源中，最重要的是人力资源当今的竞争主要是科技的竞争、智力的竞争，而这些归根结底都将是人力资源开发及其潜能充分利用的竞争所以，如何实现人力资源开发及其潜能的充分利用是企业公认的一大课题，而其中最为复杂和困难的，就是如何做好人员激励，使其潜能充分得到发挥改革开放以来，以提升物质利益为主题的薪酬改革一度成为了我国企业改革的暖门话题，而仅仅靠提升物质利益是否就可以充分发挥薪酬的激励作用也日益引起了人们的思考但不可否认企业能可持续发展的重要秘诀之一，应是建立合理有效的薪酬体系，从根本上保证人力资源的竞争优势，并将之转化为市场竞争的优势在本文中，笔者的主

In this situation, the books will gradually become the access to and the main way to increase my knowledge, and the library would naturally occupy in people's lives in a certain location, how to scientifically manage the library is not only related to the convenience of the reader to seek knowledge level is also related to library development, therefore, develop a comprehensive library management system will become essential, and this paper describes the environment in the Visual Basic6.0 adoption of the "top-down master plan, bottom-up application of development "strategy of development of the detailed process of this system is proposed to achieve the library information management, the basic objective of sharing resources, thus promoting the pace towards the digital library and described the system architecture design and functional design, from the warehouse of books Registration to the query view, from the library card issued to the lending of books, forming an overall automated management model, from the perspective of software engineering, scientific and rigorous exposition.

在这种形势下，书籍就渐渐地成为人们获取并增长知识的主要途径，而图书馆就自然而然地在人们的生活中占据了一定的位置，如何科学地管理图书馆不但关系到读者求知的方便程度，也关系到图书馆的发展，因此，开发一套完善的图书馆管理系统就成不可少了，本文介绍了在Visual Basic6.0环境下采用"自上而下地总体规划，自下而上地应用开发"的策略开发本系统的详细过程，提出实现图书馆信息管理、资源共享的基本目标，从而推动迈向数字化图书馆的步伐，并阐述系统结构设计和功能设计，从图书的入库登记到查询浏览，从借书证发放到图书的借阅，形成了一个整体自动化管理模式，从软件工程的角度进行了科学而严谨的阐述。

In Chapter 2, a detailed survey on digital image watermarking is presented. InChapter 3, an optimal scheme is proposed to use Human Visual System model tocompute masking function. It will be used to control the strength of watermark signalfor optimal embedding. In Chapter 4, we propose a novel watermarking scheme based on lattice vectorquantization. Some important transform coefficients of the original image are firstlymapped into the nearest neighboring lattice points by using lattice vector quantizer,then watermark signal is added to the lattice points.

本文讨论了数字图像水印及其在多媒体安全中的应用，主要围绕下列问题进行研究和创新：1、优化的水印嵌入模型：本文对基于直接序列扩频技术的水印算法进行了改进，根据人类视觉系统感知模型，提出了优化的水印嵌入模型，在不可感知性条件的限制下，使水印的鲁棒性达到最高。2、基于格矢量量化的图像水印：本文提出了基于格矢量量化的多比特盲水印算法，不需要原始图象就可以实现水印信号的检测和译码。

The results show that the introducing of multivinyl monomer and CaCO3 can slow down polymerization rate to different extent.Using 1％～5％ trimethylolpropane trimetbacrylateor divinyl benzene,tight encapsulation of CaCO3 can be realized and beyond 94％PS cannot be extracted. The amount of crosslinker or emulsifier should be accommodated when the load amount of CaCO3 is increased.CaCO3 content in the product increases consequently with the increase of the loaded amount of CaCO3,which can be known from FT-IR and TGA.TEM observations reveal that when the load amount of CaCO3 is 14.8％,most CaCO3 particles are encapsulated and each latex particle contains one CaCO3 particle.Composite particles have well-defined core—shell structure and the thickness of polymer shells is around 10 nm.However,the thickness of polymer shell decreases and many free CaCO3 particles appear when the load amount of CaCO3 reaches 29.3％and 58.7％,respectively.

结果表明，多乙烯基单体以及碳酸钙的引入会使聚合反应速率有不同程度的降低；使用1%～5%的TMPTMA或DVB，可实现PS对碳酸钙颗粒的牢固包覆，不可抽提的PS达94%以上；当碳酸钙用量改变时，需要适当调整乳化剂和多乙烯基单体的用量；IR和TGA的结果表明，随着碳酸钙用量增加，产物中的碳酸钙含量也相应增加；TEM照片和计算结果显示，当碳酸钙用量为14.8%时，绝大部分碳酸钙颗粒被包覆，且基本上每个乳胶粒中包覆一个碳酸钙颗粒，复合粒子具有清晰的核壳结构，壳层厚度约为10 nm，而当碳酸钙用量增加到29.3%和58.7%时，壳层厚度减小，并且出现较多裸露的碳酸钙颗粒。

As a differential detection is used between the intercarrier, the proposed algorithm overcome the high sensitivity to timing error of conventional algorithm and is robust to multi-path. The effect of sample frequency offset can't be ignored in a continuous OFDM system of a large number of subcarriers. The estimation precision of the conventional algorithm is low and the realization is complex. A joint estimation of sample frequency offset and fine frequency offset based on difference operation is proposed. As averaging use a large number of samples in a maximum likelihood algorithm, the estimation precision is very high. The use of difference operation cancel the effect of carrier frequency offset, and the proposed sampling frequency estimation algorithm is robust to carrier frequency offset.

最后，本文对连续系统中的采样频率和载波频率精同步技术进行较为深入的研究，由于子载波数目大的连续OFDM传输系统中，采样频率偏差不可忽视，以往的采样频率估计方法精度低、实现复杂，因此本文提出了一种基于差分处理的采样频率偏差和精载波频率偏差联合估计算法，利用了最大似然算法进行采样频率偏差的估计，由于采用了差分处理方法，消除了载波频率偏差对采样频率偏差估计的影响，采用的最大似然算法对大量样点进行平均化处理，所以，相对以往算法，提出的联合算法估计精度高，而且采样频率偏差估计对载波频率偏差具有鲁棒性。

Also, based on the security of CPK algorithm, the method is sufficient for privacy and unforgeability in realizing mutual authentication in mobile IPv6 networks.

同时基于CPK算法的安全性，提出的方案在有效实现用户和网络的双向认证的同时可以保证私钥的保密性和签名的不可伪造性。

It makes its capabilities unforgeable by storing them in internal kernel memory space. POSIX capabilities used in Linux , which are quite different, divide all traditional powerful root privilege into a set of distinct privileges, therefore harden Linux in face of some defective programs.

它采用保护地址空间的方法使得其能力不可伪造，但它跟经典的能力系统实现存在较大的差异，Linux中使用的POSIX Capabilities则完全不同，它只是将传统Unix系统中的强大的root权限作一有限子集划分，从而使得Linux在面临运行存有安全漏洞的程序时不至于全线崩溃。

The Trojans were struck with terror when they saw the snake, portent of aegis-bearing Jove, writhing in the midst of them, and Polydamas went up to Hector and said, Hector, at our councils of war you are ever given to rebuke me, even when I speak wisely, as though it were not well, forsooth, that one of the people should cross your will either in the field or at the council board; you would have them support you always: nevertheless I will say what I think will be best; let us not now go on to fight the Danaans at their ships, for I know what will happen if this soaring eagle which skirted the left wing of our with a monstrous blood-red snake in its talons was really sent as an omen to the Trojans on their essaying to cross the trench.

一个普通之人决然不可和你对唱反调――无论是在议事中，还是在战场上――我们永远只能为你的事业增彩添光。现在，我要再次说出我以为最合用的建议：让我们停止进攻，不要在达奈人的船边苦战。我以为，继续战斗的结果将和预兆显示的一样，假如那个由鹰鸟送来的兆示――当我们准备过沟之际，出现在我们眼前――真是个含义明确的警告：苍鹰搏击长空，一掠而过，翱翔在我们的左前方，爪下掐着一条巨蛇，浑身血红，仍然活着――但它突然丢下大蛇，不及把它逮回家去，实现用蛇肉饲喂儿女的愿望。

One thing is sure, is that they do not support or even oppose the idea of substituting art, and associated with this is that they recognize the value or the value added of the fine arts. They are not esthetes, but firmly believe that art must have an aesthetic quality--in their eyes all the so-called ideas, even the most valuable concepts of art must be achieved through the aesthetic of the intermediary, even though they may oppose the concept of contemporary art's tendency to suppress the technology, but they do not flaunt technological supremacy. They acknowledge and accept the meaning of art, but they also convey the concept of artistic value in way they try to select a relatively moderate path, neutral, and not too left or right, but also East and West, ancient and modern, not avant-garde nor stale, either extremes must be avoided. And to be able to do this, we've reached the limits of a teacher's role, going beyond these expectations is not very realistic, as the less moderate we get, the further we are from a teacher's identity.

有一点可以肯定，那就是他们不赞成甚至反对以观念代替艺术，与此相关联的是他们承认甚至看重技术对於艺术的价值，他们都不是唯美主义者，但坚信审美是艺术必须具备的品质，在他们眼里一切所谓观念，即使是最有价值的观念在艺术中都必须经由审美的中介加以实现，虽然他们反对观念至上，反对当代艺术中蔑视以至讨伐技术的倾向，但他们并不标榜技术至上；他们承认并接受观念对於艺术的意义，但他们同时看重传达观念的方式，他们试图选择的是一条相对中庸的道路，不偏不倚，不左不右，亦中亦西，有古有今，前卫亦无不可，极端则须避免，能够做到这些，已经是作为教师的角色选择的极限，超越这些范畴的期待已经不很现实了，而远离这些范畴的选择又似乎有违於教师的身份。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。