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With the modern electronic measurement technology that can produce all kinds of signals in the digital waveform signal generator application of more and more, this paper, a DDS as the basic unit of the digital shift, I believe the generator design .

摘 要：随着现代电子测量技术的发展，能够产生各种波形信号的数字式信号发生器的应用越来越广泛，本文介绍了一种以DDS为基本单元的数字移相信号发生器的设计方法。

They appreciatively attribute what they eat every day, from different kinds of new vegetables to new fish varieties, to the efforts of scientists.

人们总是对科学家的工作充满感激，因为是他们的努力才使得自己能吃到各种各样的新品种蔬菜或是新的鱼类。

If we hope to use a sequence of finite objects to approximate infinite objects, then we should know what kinds of infinite objects are approximable and how to approximate them effectively.

无穷形式对象可逼近的充分条件为了研究哪一类无穷对象可以逼近以及如何有效地逼近它们，我们用过程模式作为无穷对象上的计算的模型，用以刻画接受无穷输入、生成无穷输出的无穷对象上的计算。

This section presents two kinds of characteristic schemes, one is the natural use of the usual backward Euler characteristic difference scheme ( [60] ) onto the triangular mesh, the other replaces the backward Euler's method by modified Euler formula to approximate the characteristic differential equation, so that the discretization for characteristic curve can get up to second order accuracy.

本节给出了两种三角形网格上的特征差分格式，第一种是通常的向后Euler型特征差分格式（[60]）在三角形网格上的自然运用，第二种采用§3.3、§3.4的离散思想，使用改进的Euler公式代替向后Euler公式来近似特征微分方程，使其对特征线的离散达到了二阶精度。

Objective To study expressing features and significance of soluble CD44 in aqueous humor of different kinds of glaucoma.

目的 探讨可溶性CD44分子在不同类型青光眼房水中的表达特征及意义。

There are, in general, two kinds of relationships between the form and the meaning of a linguistic sign: arbitrariness and non-arbitrariness.

本文将在系统研究有史以来具有代表性的任意性和象似性理论的基础上，摒弃矛盾，梳理出自己的观点。

Here, we have taken a solid pace, with the company three professional series of products (solid wood composite floor Archaize; solid wood compositeáYaguang, light wear-resistant flooring; solid wood composite wear-resistant floor coating leaching), up to 50 kinds of color, excellent quality,"the United States Fujiya" floor is big step towards Europe and America, Southeast Asia and the vast floor of the domestic market.

在这里，我们迈开坚实的步伐，凭借公司三大专业系列产品（实木复合仿古地板；实木复合免漆亚光、亮光耐磨地板；实木复合淋涂耐磨地板），多达50余种花色，品质优秀的"美藤屋"地板正大步走向欧美、东南亚及国内广阔的地板市场。

Based on the idea of "human-centered, personalized-design ", the company's design style shows "people oriented, natural primary" in design, furnishing and ornament, which include the modes of European village, Spanish, Italy, Santa Polo, as well as all kinds of floriculture, fine fabric, iron works, ceramic handicraft and sculpture in Southeast Asian, Indian, Chinese archaize and modern style.

公司以"人性化、个性化"为理念，在设计、陈设、配饰等方面均体现"以人为本、源于自然"的设计风格。目前，公司的设计涵盖了欧式乡村、西班牙、意大利、圣大保罗以及东南亚、印巴、中式仿古、现代等风格的各式摆件、花艺、布艺、铁艺、陶艺以及雕塑等。

Based on the Reynolds stress model CFD numerical simulation method, the experimental study of the inflow field and separation feature of nine forms of entrance structures of the oil-water separation hydrocyclone including vortex curved entrance and Archimedes spiral entrance is carried out and four kinds of ideal optimized entrance structures are obtained.

采用雷诺应力模型CFD数值模拟方法，对涡线形曲面入口、阿基米德螺旋线形入口等9种油水旋流分离器入口结构形式的内流场和分离特性进行了试验研究，得出比较理想的4种优化入口结构形式。

The relationship between the two kinds of structure is the important pledge of healthy, comfortable and sustainable humanistic objective for urban enviroment. In allusion to the problem urgent to solve in recent creation, the article summarizes the humanistic design concept and strategy for serried region of high-rise building, from the analysis of the building noumenon, space, interior and exterior enviroment in urban"serried-core". The strategies are form creation strategies which cultivate formal individuality in the relationship with urban enviroment, and conform urban context in the relationship with restrictive factors; space creation strategies which creat humanistic space and site by attempering architectural space and urban space, and call for humanistic scalc and inspirit by the combination of architectural space and urban function; enviroment creation stategies which create sustainable physical enviroment based on steady urban zoology, and construct poetic humanistic enviroment during the course of compound urbar enviroment.

针对目前创作中亟待解决的问题，着重从城市"簇群核"的形式、空间、环境及其主要载体——高层建筑等方面深刻解析，鲜明提出了在城市大背景中高层建筑密集区的人性化创作观念和策略，论证了在与形式制约因素的关联中系统整合城市文脉、在与城市人文环境的互动中努力培育形式个性的形式创作策略；在建筑空间与城市空间的互参调度中创作人性空间和场所、在建筑空间与城市功能的有效结合中弘扬人性尺度和精神的空间创作策略；在稳定城市生态的前提下创造持续可居的物理环境、在复合城市环境的过程中营建诗意栖居的人文环境的环境创作策略。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。