查询词典 frequency

Different antenna frequency have different using, underground utilities or dewater box can use antenna frequency 100 MHz with 250 MHz.

4不同天线频率有其适用性，地下管线及箱涵可搭配天线频率100 MHz和250 MHz相互使用。

The circular polarization at the lower resonant frequency of the dual-frequency antenna can be achieved by setting a perturbation segment at an appropriate location in the patch element, and placing the feed point on the diagonal axis.

在较低的谐振频率处圆极化的获得是通过在天线辐射单元上适当地设置摄动元素，并将馈电点移到辐射单元的对角线上。

Main products of OMMA are High Frequency Electrotome (DD-2 serials) with independent intellectual property rights and two serial accessories of High Frequency Electrotome, such as Bipolar Diathermy Forceps and Medical Pedal Switch. Bipolar Diathermy Forceps has four regular models, such as gun-shaped forceps, gun-shaped pincett, straight forceps and straight pincett, and subdivides into 48 specs.

现主要产品有高频电刀DD-2系列产品，具有独立的知识产权；有高频电刀配件两大系列：双极电凝镊已形成比较稳定的四种型号(枪状镊、枪状弯镊、直镊、直弯镊)及48个规格；医用脚踏开关系列有单联和双联两种型号3个规格。

The dielectric relaxation is non-Debye dielectric relaxation when slow polarization effect cannot be neglected in the samples. And from low frequency to radio frequency, the complex ε of the samples is not consistent with Kramers-Kroning relation.

实验表明：介质中慢极化效应的存在使得其介电弛豫普遍都不是德拜型的；在超低频至射频的广阔频段，样品的复ε不满足Kramers-Kroning关系。

For the sake of predicting the detection effect of differential operator s,the frequency features of common operators are analyzed from the view point of frequency domain.

为了预测微分算子边缘提取能达到的效果，从频域角度出发，分析了边缘检测中常用微分算子的频谱特性。

High frequency technology has been widely applied to power supply. So, it is possible to make high frequency power supply for X-ray diffractometer.

高频技术已经广泛应用到了电源制造领域，因此，研制X射线衍射仪高频高压电源成为了可能。

The present paper uses the direct sequence spread spectrum technology, key to short-wave communication and direct sequence spread spectrum correspondence characteristic as well as union advantage, wide frequency code production, the direct sequence spread spectrum communications system technology and the principle, the wide frequency synchronization technology, the RAKE receive technology has conducted the research and the analysis.

本论文采用直接序列扩频技术，重点对短波通信与直接序列扩频通信的特点以及结合的优点，扩频码的产生，直接序列扩频通信系统的技术与原理，扩频同步技术，RAKE接收技术进行了研究与分析。

Time-Frequency parameter estimation and direction finding for nonstationary signals impinging on an antenna array over a wide frequency band (2~18GHz) is under in-vestigation, and a new method for parameter and 2-D Angle-Of-Arrival estimation of spatio-temporal undersampled LFM sources is proposed in this paper.

摘要针对宽频段(2-18GHz)内非平稳来波信号的参数估计和测向问题，提出一种时空欠采样线性调频信号参数与二维到达角联合估计方法。

The 7-day low flow was regarded as statistical quantity, on the base of analysis of the discordancy measure and heterogeneity measure, the regional low flow frequency for Donjiang basin was carried out using L-moments based five frequency distributions with three parameters viz. Generalized Pareto, Generalized extreme-value, Generalized Logistic, Lognormal (LN3) and Pearson type Ⅲ. Based on the L-moments ratio diagram,{Z} and τ4-statistic criteria, LN3 distribution was identified as the most appropriate distribution for the homogeneous region with the 14 sites.

以年最小七日平均流量作为枯水径流的统计特征量，在水文站点一致性分析、水文相似区鉴别的基础上，以常见的5种三参数分布函数：Generalized Pareto分布、Generalized Extreme-Value分布、Generalized Logistic分布、LogNormal分布(LN3)和Pearson type Ⅲ为研究对象进行东江流域区域枯水频率分析。

The Toolbox too frequency analysis of a kind of important transformation, discrete time-frequency distribution of the toolkit,...

该工具箱为时频分析中的一类重要变换，离散时频分布的工具箱，其中提供基本算法的程序。

Must have Coordination and negotiation skill, flexible ideas, and be punctilious person.

必须具备较好的协调与谈判能力，头脑灵活，工作认真仔细

Result: 18 patients are all with simple eye.The pigment mole lies in nasal and temple sides of the ball conjunctiva,in which 2 lie in lacrimal caruncle and semilunar plica.

结果：18例患者均为单眼，色素痣大多数位于内外侧睑裂部球结膜面，2例位于泪阜及半月皱襞，经激光治疗后，10例色素痣消失，有5例行再次激光后消失，2例行第三次激光后消失，1例第四次激光后消失。