查询词典 domain

Then it gives two examples for numerical modeling with the Ricker wavelet. Finally, we write out the detailed proving process of the Ricker wavelet formula from time domain to frequency domain.

然后列出2个数值模拟算例并且在最后给出了Ricker子波表达式由时间域变换为频率域的详细推导过程。

Results In static phantom studies, the percent error of mean activity obtained by Carson's method was reduced to about 9 %, and it is less than that of image-derived method using maximum likelihood expectation maximization (about 14 %). In simulated dynamic phantom studies, the vessel component could be extracted using ICA in image and sinogram domain. In sinogram domain, the six components extracted by ICA could be obtained quickly.

在静态物理假体实验结果来看，使用Carson's method计算出感兴趣区域活性的百分比误差( 9%)比直接从影像取得活性的百分比误差( 14%)来得小；从数位模拟动态假体实验结果来看，独立成份分析法运用在影像空间或是弦波图空间上，都可以将血管分离出来，但从弦波图空间上得到各个独立成份相对於影像空间就快得多；imageICA和sinogramICA计算出的输入函数的标准化均方根误差分别是0.57和0.28。

This method uses the features of laser such as high-speed heating and cooling to implement scribing treatment on the oriented steel sheet surface so as to promote the generation of micro plastic deformation and high-density dislocation in its heated section, form the subcrystalline boundary, reduce its main domain wall length, and introduce residual tensile stress so obtaining the effects of refining magnetic domain and reducing iron loss.

降低硅钢片铁损的激光处理方法及装置。$该方法是利用激光快速加热和冷却的特点，对取向硅钢片表面做划线状处理，促使加热区产生微小塑性变形和高密度位错，形成亚晶界，减小主畴壁长，同时引起残余张应力，达到细化磁畴，降低铁损的效果。

In consideration of the in-pulse phase modulation and Doppler frequency rate-of-change's subtleness, a fast and accurate algorithm is proposed. The influence to parameter estimation with phase modulation is dismissed by time domain correlation between neighboring pulses. Signal noise ratio is increased by frequency domain accumulation.

该文针对信号脉内相位调制和多普勒频率变化率信息非常微弱的特点，提出了一种快速高精度估计算法，通过相邻脉冲间的时域相关消除了相位调制对参数估计的影响，频域积累增强了信噪比，利用脉冲间的相参特性进行频谱相关消除了相位模糊，并放大了多普勒频率变化率信息。

Optimize according to searching engine will design a website, it is the choice of the domain name above all, different and suffixal domain name, weight is different also.

根据搜索引擎优化来设计网站，首先是域名的选择，不同后缀的域名，权重也不一样。

China the blame English domain name that has a requirement so is suffixal keep system of global root domain name as soon as possible.

中国这样具备条件的非英文域名后缀尽快写入全球根域名系统。

China " such blame English domain name is suffixal, the national code of pure Chinese top class region " Chinese domain name will blend in internet formally.

中国&这样的非英语域名后缀，纯中文的国家代码顶级域&中国域名将正式融入国际互联网。

As we have learned, ICANN accelerated the blame such as Chinese English domain name is suffixal the global deploy that keeps system of global root domain name acts.

据了解，ICANN加快了中文等非英文域名后缀写入全球根域名系统的全球部署行动。

The thesauri will be used to index and search domain information in systems, the main users will be public domain web users, the digital surface and visualization will be the main windows of thesauri.

叙词表主要用于计算机系统后台的标引和检索，用户主要为使用网络检索专业信息的普通用户，数字界面和可视化将是叙词表的主要表现形式。

The holistic design of the system and resolved the designs of software and hardware based on VXI bus are put forward according to the demand of test system. The hardware and software is designed, including the formation and design of hardware system, visual instrument software architecture, program design for instrument driver, high speed real-time data collection. In the dynamic test program, the idea of"software is instrument"was applied to meet the diverse test demands. Last, it is proposed that the VXI test system be developed to more totalization and networked. The basic theory of system identification was introduced briefly at first. The principle of spectrum analysis system identification based on Wiener-Hopf equation was expatiated. and the questions in applying Peusdo Random signal as spectrum analysis methods stimulate signal was studied, The generation principle of the peusdo random signal is researched, the characteristic of peusdo random are analyzed from time domain and frequency domain, the inverse repeat peusdo random signal is brought forward to make up the shortage of ordinary peusdo random signal. And a new chaos genetic algorithmis presented to solve the unprecise problem of the traditional method. In the servo valve dynamic characteristic test system, the spectrum analysis methods was applied successfully, the servo valve dynamic characteristic could be acquired rapidly and exactly, the test results were analyzed and the ameliorate methods were brought forward at last.

结合航天某集团液压测试中心测试系统的需求，提出了基于VXI总线的液压测试系统的整体设计方案，完成了测试系统的硬件设计与软件设计，包括硬件系统构成与设计、虚拟仪器软件结构、仪器驱动程序设计、高速同步实时数据采集等内容；以伺服阀动态特性测试为例设计了测试模块，该模块体现了VXI总线仪器软件开发所倡导的&虚拟仪器&的思想，以软件的灵活应用满足了不同的测试需求；结合自动测试系统的发展，研究了VXI测试系统与网络技术结合，实现各种软硬件资源共享，进一步提高设备及数据的利用率和系统的扩展性，使自动测试向综合化、网络化方向发展；研究了伪随机信号作为谱分析法辨识的激励信号时存在的问题，讨论了伪随机信号的产生机理，从频域和时域分析了伪随机信号的性质及其应用，提出了用逆重复伪随机信号弥补了普通伪随机信号的不足，并以混沌遗传算法对逆重复伪随机信号产生过程中的参数进行优化，可以更合理而不是凭经验产生需要的逆重复伪随机信号。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。