四元的

However, at Yuan dynasty and earlier Ming dynasty, Muslin distributed over all china and gather partly. Muslin who gather together in Nanjing and the station of special economy, politics and culture had brought up Zhangzhong (born at Suzhou, studing at Nanjing), Wangdaiyu, Liuzhi, Mazhu, Jintianzhu, etc, who are familiar with four religions and are scholar of Jingling school of thought of Chinese Islamism .They deeply thought of theirselves'nationality and their religion by highly sense of historical mission and sense of duty. They initiated"explaining Alcoran with Confusion"movement. The movement and it's practice essencely is the talk, interflow and mix between Islam civilization and Chinsese Confusion idea.

然而，元及明前期穆斯林的大分散与小集中、金陵城下穆斯林的大集中以及明清之际南京地区特殊的区域经济、政治、文化地位催生了张中(虽是苏州人，但是学在南京)、王岱舆、刘智、马注、金天柱等"四教兼通"的"中国伊斯兰教金陵学派"的学者，他们以高度的历史使命感和责任感，开始了对本民族及其所信仰宗教在我国存在与发展的深沉思考，并发起了"以儒诠经"运动，"以儒诠经"运动及其实践就其本质而言是伊斯兰文明和中国儒家文明历史上的一次重要对话、交流与融合。

This article first introduces the math foundation required by ECC,including the addition rule for elliptic curve point defined over finite field.Then , the principle of ECC is discussed and its security and efficiency of ECC are analyzed.Third, a cryptosystem is designed through analyzing the security requiration, choosing the elliptic curve domain parameters,denoting field element,elliptic curve and elliptic curve point,choosing associate primitves and schemes andpartitioning functional module.Forth, how to develop a crytosystem based on elliptic curve encryption algorithm is investigated.Fifth, a cryptosystem we have developed by us and the testing result is described.

本文首先介绍了ECC的数学基础，对有限域上椭圆曲线点的运算规则进行了详细描述；其次探讨了ECC的原理，分析了ECC的安全性和有效性；第三，设计了一个基于ECC的加密系统，包括系统的安全需求分析，域参数选择，域元、椭圆曲线、点的表示，原语和方案的选择，及整个系统的模块功能划分；第四，在设计的基础上，研究如何开发一个基于椭圆曲线的加密系统；第五，描述了一个我们已经设计与开发的基于椭圆曲线的加密系统，并给出了相应的测试结果。

In Chapter 4, A detailed comparison between the realization of Cholesky decomposition and OR method is given, a systolic/wavefront array made of general purpose DSP is used to realize the adaptive beamforming at a moderate speed, and a wavefront array to extract the adaptive weights which is necessary in some applications is designed. In Chapter 5, the author proposed a new structure to realize the space time adaptive processing. First 1~q using the FFr and the truncating infinite sequence and sone optimizing method, a much simpler architecture can be acquired in realizing the three portion of channel processing: quadrature sampling, pulse compression and adaptive equalization.

第五章研究并提出了用全通用DSP模块设计空时二维自适应信号处理机的新方案，首先用快速付立叶变换和对长序列截断处理的重叠保留法以大大减少的运算量完成了处理机通道处理部分的正交插值、脉压、自适应均衡三个功能块的长阶数线性卷积运算，接着对自适应波束形成提出了多种实现方案，分析了多种方案下的运算量和设备要求，指出在不同通道数、不同数据吞吐率、不同自适应要求时这几种方案有不同的可行度和实现难度，并针对实际要求确定了一种运算田N、的实现方案，对自适应波束合成部分的大量贝玉以良元组咸肋冈络结拘和处凰闺和羽凶挝娠昨了优化设计以威少设备复杂性，构成了设备量大夕父伯小、们g团回高、辜于生回阴田闩引愧快的空时二维自适囱戏升引毗四机。

Using the Mindlin theory, the four-node finite element shell modal of healthy and damaged structure is formed; Using Green Function theory, the fluid around the structure is considered to be inviscid, irrotational and incompressible, and then the effect of fluid to structure is translated to the added mass matrix compared with global mass matrix using BEM.

基于Mindlin理论，本文建立了描述健康和损伤的四结点有限元板壳单元模型；基于Green函数理论，将结构所处的流体环境考虑为无粘、无旋、不可压缩的理想流体，推导了三维问题拉普拉斯方程的基本解，并利用边界元方法将流体对结构的影响归结为对结构整体质量矩阵的影响；针对各向同性损伤单元，采取刚度各向整体弱化的方法分析；对于各向异性损伤单元，采用Kachanov理论，引入了x和y两个方向的弹性损伤折减系数。

In the dehydrogenation process of HD process, the temperature set at 580℃ and pressure set at 100Pa is a perfect parameter, it can make the magnet to have high magnetic performance. In the HDDR process experiment, the paper contrast four HDDR process such as C-HDDR V-HDDR V-HD-S-DR and d-HDDR by the anisotropy and magnetic performance of ternary NdFeB magnetic material. The results show that adjusting the parameter of the d-HDDR process can make the anisotropy and magnetic performance of ternary NdFeB magnetic powders to catch up with the hexahydric NdFeBCoZrGa magnetic powders. At the end the paper discusses the betterment of the equipment which produces ternary NdFeB magnetic with the d-HDDR process.

和580℃的脱氢温度相搭配的脱氢气压选择在100Pa左右是理想的工艺参数，这样的搭配使得最终烧结磁体综合磁性能优异；在HDDR制粉工艺实验中，本文对比了C-HDDR、V-HDDR、V-HD-S-DR和d-HDDR四种HDDR工艺对于三元NdFeB合金各向异性和磁性能的影响，得出结论：通过发展d-HDDR工艺，调整工艺参数和控制水平，可以使三元NdFeB合金磁粉的性能达到或接近六元NdFeBCoZrGa合金磁粉的水平，在文章末尾，还对配合使用d-HDDR工艺设备的改造进行了分析。

The influence of Fe(superscript 2+) adjustment in omphacite on the p-t conditions has been discussed by comparison, and the charge balance method has been recommended as the ideal one for Fe(superscript 2+) adjustment in omphacite.

本文通过对南大别太湖地区和桐城地区榴辉岩中绿辉石的四种Fe(上标 2+)的校正比较，依据计算的峰期变质p-t条件和岩相学研究的限定，探讨了绿辉石Fe(上标 2+)的校正对温度压力计算的影响，认为电价平衡是目前较为理想的校正绿辉石Fe(上标 2+)的方法，并建议为保证分析的准确性和全面性，配合使用端元组分调Fe(上标 2+)法和Fe(上标 2+)/Fe(上标 3+)=1：1方法。

A City Garden sale with the Department of Miss He told reporters that those in Zhejiang, Shanghai to one of the guests to see such a cheap price, even if buy a set of Seaview Room三房两厅also only 400,000 yuan, compared to them at every turn七八千yuan per square meter of housing prices to very attractive, can not you tempted?

城市花园销售部的小姐告诉记者，他在浙江，上海的一个客人看到这种价格便宜，即使买了一套三房两厅的海景房也只有四十○点零零万元相比，他们动辄七八千元每平方米的房价非常有吸引力的，你不能诱惑？

I think that metacognition plays four roles in the Chinese reading class. First, it could help the students know the purpose of reading; secondly , it could help improve their comprehensive ability; thirdly, it could help them know how to read; and fourthly, it could help them get the habit of self-reading.

通过文献研究和教学实践总结，我认为，在高中生的语文阅读中，元认知有四个方面的作用：（1）能提高阅读的目的性和计划性，（2）能促进学生学会阅读理解，（3）能深化学生的阅读理解，（4）能促进学生阅读活动中的自我监控。

The most important parts of the whole thesis are the post-modern textual features of the Chinese contemporary avant-garde fiction, the textual features consist of the artistic form of writing and the textual content of writing. The artistic form includes three aspects, i.e. metafiction, anti-plot and linguistic play. The textual content includes four aspects, i.e. deconstructing "Grand history", deconstructing social reality, deconstructing human social values and deconstructing textual theme etc.

先锋小说的后现代文本倾向主要表现在形式和内容两方面：就形式而言，它包括元小说特征、反情节特征和语言游戏特征等三个方面；就内容而言，主要表现在对&大写的历史&的消解、对现实质感的消解、对人物质感的消解和对主题思想质感的消解等四个方面。

Apart from the famous Six Characters in Search of an Author (1921), notable examples include Right You Are If You Think You Are (1917), a tale of a mysterious woman who could be either one of two different people, and Henry IV (1922), the story of a madman who believes he is a German Emperor from the eleventh-century.

除了著名的6个字元，搜索的作者（ 1921年），显着的例子包括你说得对，如果你认为你是（ 1917年），一个故事，一个神秘的女人谁可以是两个不同的人，和亨利四世（ 1922年）中，讲述了一个疯子谁相信他是一个德国皇帝从第十一世纪。

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。