查询词典 fundamental domain

The fundamental and higher-order harmonic ultrasound fields of a zeroth-order Bessel ultrasound field and focused Gaussian field in absorbing medium are computed and simulated by solving the KZK equation using a frequency domain finite difference method.

通过频域有限差分方法求解KZK方程，对吸收媒质中的零阶Bessel超声场、Gauss聚焦超声场进行计算，得到基波和高次谐波声场的数值解和仿真图，计算仿真结果验证了上述的理论结论。

The domain variables are interpolated by classical fundamental solutions and thus allowing for the transfer of the domain integration to the boundary.

其中，域内场函数用基本解插值，边界上的场函数用移动最小二乘法插值。

Content shedding is the fundamental domain in socioeconomy, but the central issue that just just beginning to get take seriously and be becominged quickly paying close attention to in our country in last few years.

物流是社会经济中的基础领域，但只是在近几年才开始在我国得到重视并迅速成为关注的焦点。

Below this kind of circumstance, the leading group of grand celestial bodies thinks to want to break through in CAD domain, must extend business to domain of fundamental platform software.

在这种情况下，浩辰的领导班子认为在CAD领域要想突破，就必须把业务拓展到基础平台软件领域。

Information and library science and knowledge management has respective research object and the territory of research, but the mutual fusion each other may bring the new development opportunity in the fundamental research domain and the practice domain aspect for both sides.

图书情报学与知识管理有着各自的研究对象和领域，但是二者在理论研究和实践方面的相互融合都可为对方带来新的发展机遇。

"Current, IT industry focus is transferred to the search phase of Internet magnanimity data gradually, show level to look, the Internet of our country studies more concentration is using a field, and the strength of the maturity as Chinese Internet industry and relevant company actual strength, to involve more the fundamental domain of core considered to offer equal opportunity."

"现在，IT产业重心逐渐向互联网海量数据的搜索阶段转移，现阶段来看，我国的互联网研究更多集中在应用领域，而随着中国互联网产业的成熟和相关公司实力的壮大，为涉及更核心的基础领域研究提供了合适的时机。"

Domain requirements are fundamental for software reuse and are the products of domain analysis. Software product lines deal with reusable assets across a domain by exploring domain requirements commonality and variability, so domain requirements is very important role in software product line engineering.

领域需求是软件复用的基础和领域分析的产物，软件产品线通过分析领域需求的共性和可变性来生成一个领域可复用的核心资产，因而领域需求是软件产品线工程中非常重要的角色。

The personage inside course of study expresses, the domain name is all Internet application and the root that enterprise informatization applies, CNNIC puts forward build a business for fundamental compose with the domain name sincere letter system, will be our country Internet sincere letter construction offers new settlement method.

业内人士表示，域名是一切互联网应用和企业信息化应用之根，CNNIC提出的以域名为基础构建企业诚信体系，将为我国互联网诚信建设提供新的解决路径。

Aimed at rapidity and low power consumption required by intelligent mines,based on correlation theory and pattern recognition technology,a new method is given,in which helicopter noise signal of time domain is analyzed directly,that is to estimate fundamental frequency by calculating self-correlation function,then recognize target thinking of the fundamental frequency as characteristic quantity.

预警识别是被动声探测的关键技术之一，其作用是探测环境噪声信号作为预警信号，当直升机或其它目标出现时，传声器检测到的声能首先被转化为一定幅度的电压信号，电路通过判断信号的大小和其它特征来确定是否出现直升机目标。

In the ***, all types and fundamental principles of Radon transform are summarized systematacially. This *** starts from the general linear Radon transform, and then researches how to use the damped least square method to find the solution of the forward transform. However, the least squares smoothing effect will lead to a certain degree of trails in the data of Radon domain, which led to the application\'s limitations. After that the implementation in Radon domain and relative merits of linear Radon transform, parabolic Radon transform and polynomial Radon transform which have time invariance are introduced, the conjugate gradient method that can solve numerical solution is also given. And then the high resolution Randon transform is discussed, it introduces the regularization theory and Bayes principle into inversion, which successfully remove the negative affect caused by discrete Radon transform. Finally, we introduce the optimal weighting similar coefficient Radon transform, which adapt to the time variant quality of hyperbolic Radon transform.

本文系统总结了Radon变换的各种类型及其基本原理，从τ- p变换(即一般线性Radon变换)出发，研究利用阻尼最小二乘平方法求解其正变换，但是最小平方法的平滑作用会导致Radon域数据存在一定程度的拖尾效应，给这种方法的应用带来了很大的局限性；然后先容了具有时不变性的线性、抛物和多项式Radon变换在频率域的实现及其优缺点，给出了求解其数值解的共轭梯度算法；接着讨论了高分辨率Radon变换，它把正则化思想和贝叶斯原理引进到了反演中，很好的克服了离散Radon变换产生的截断效应对结果的不利影响；最后先容了适应双曲Radon变换时变性质的高分辨率最优相似系数加权Radon变换。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。