使优化

This dissertation is mainly concerning digital image watermarking problems. In Chapter 2, a detailed survey on digital image watermarking is presented. In Chapter 3, an optimal scheme is proposed to use Human Visual System model to compute masking function. It will be used to control the strength of watermark signal for optimal embedding. In Chapter 4, we propose a novel watermarking scheme based on lattice vector quantization.

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。

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 throughput of the mineral terminals would reach to 8,620,000 tons and that of the finished- product terminals 1,800,000 tons by the means following:Enlarge the 6#,7#,8# and 9# quay,connect the wharfage of 6# quay with that of 7# quay,connect the wharfage of 8# and 9# quay,make the operation in the quay harmonious,improve the management of logistics and make the type of arriving ships more reasonable,etc..

通过采取扩建6、7号码头和8、9号码头库场或将6号与7号码头的库场和8号与9号码头的库场相连通，增加码头作业的协调性，优化货源组织与库场管理、优化到港船型等措施后，可使工业港矿石码头综合通过能力达到862万吨，成品码头综合通过能力达到180万吨。

Finally a comparison of optimization results between complex method and genetic algorithm is carried out, which shows the value of objective function ha s decreased 6.6% under GA. This will help decrease the slippage of steering whee l and wear extent of tyre. At the same time, it also verifies the feasibility an d superiority of genetic algorithm in solving the nonlinear optimization problem s with many restraints and variables.

计算结果表明：与复合形法相比，遗传算法使目标函数值减少了6.6%，取得了较好的优化效果，从而更有利于减小转向车轮的滑移量和轮胎的磨损量，同时也验证了遗传算法解决多约束、多变量类型优化问题的可行性和优越性。

These two electrochemical reactions happens in one polymer macromolecule, which can not only improve the structure of aminoanthraquinone polymer, but also provides a better electrochemical activity.

这两种过程在共轭体系中的同一分子单元中发生，不但使氨基蒽醌聚合物的结构得到优化，还使其具有很高的电活性，使其在能量存储和电催化等方面表现出优异的性能。

A comparison was made on force bearing conditions of the cycloidal gear with the same typed two pieced gear cycloidal reducer.

这样在其它基本尺寸不变的情况下，通过对传统结构进行修形量优化和参数优化，使轴向

The IDDIO can efficiently deal with synchronous and independent requests.

IDDIO模型克服了现有模型只能对一类请求进行优化的缺陷，它可对同步I/O请求和独立I/O请求同时进行优化处理，使服务性能获得较大改善。

Function of its interlaminar shear force coefficient is gained. Applicability of the function has been validated, so it can be applied in the optimization design of structure stiffness.

提出了使累积塑性变形按楼层均匀分布的优化布置刚度结构层间剪力系数表达式，可以用于结构优化布置刚度的设计。

Through the study of this course, the students are aimed to master some primary theories and methods of operations research and are taught to apply them to solve the practical management problems. It also enables the students to construct the concept of global optimization and the capability of systematical analysis via the introduction of the principles and the explanation of algorithms as well as the case study. And some practical softwares such as LINDO and EXCEL are also inducted to provide the students with tools for model solution and result analysis, which help them to learn for application.

通过本课程的学习，使学生能够掌握运筹学的一些主要理论和方法，培养学生能运用模型来研究解决管理中实际问题的能力；通过原理介绍、算法讲解、案例分析等，使学生建立起整体优化的观念和系统分析的能力；通过介绍基本的实用软件（如LINDO、EXCEL等）的使用方法，使学生具备会运用软件工具对各类运筹学模型进行求解和结果分析的能力，力争做到学以致用。

The most of the product became soluble from inclusion body by lowering induction temperature. At the same time the gene was cloned into vector pMAL-p2X, which was translated in E. coli TB1 and expressed a fusion protein. We optimized the induction time and achieved high expression. But there was no obvious product secreted in the periplasm extract. Almost all fusion protein is expressed soluble in cytoplasm.

利用融合型表达载体pTYB11-EFE融合型表达，对诱导剂IPTG的浓度和诱导温度进行了优化，通过降低诱导温度使产物由包含体变成可溶性融合型产物；利用融合型分泌表达载体pMAL-p2X构建了表达载体pMAL-p2X-EFE-7~#，对诱导时间进行了优化，获得了较高的表达量，但发现产物没有明显的分泌表达，绝大部分是以可溶形式存在于胞内。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。