composite vein

This paper introduces the basic principle of ionospheric virtual height measurement based on ionospheric echo′s phase and the basic measurement method of combined pulse echo′s phase,and does a series of experiments of ionospheric virtual height measurement.

指出了通过测量电离层反射回波的相位随频率的变化可以提高电离层虚高测量精度,分析了利用电离层回波相位进行虚高测量的基本原理以及利用电离层垂直探测中组合脉冲回波进行相位测量的实现方法,对电离层虚高进行了一系列测量实验。

The simulation results show that the power spectrum density of the combined pulses,which is obtained through two coefficient combination ways,approaches to the FCC UWB indoor spectral mask.

仿真结果表明,两种系数选择方法所得组合脉冲的功率谱密度均能较好地接近FCC室内频谱规范,且基于最小均方误差准则的系数选择能更好地逼近频谱规范,实现频谱资源的充分利用。

The anti-jamming analysis of two kinds of combination PC signals;

两种组合脉压信号抗干扰分析

Coefficient design for combination pulse based on the Gaussian pulse derivatives

基于高斯脉冲导函数的组合脉冲系数设计

Application Of modular Pulse Convertor To 8V165 Diesel Engine;

8V165柴油机应用组合脉冲转换增压的试验研究

A UWB Ranging Pulse Design with Optimizing Combination of Three Factor of Differential Gaussian Pulse

高斯脉冲三因子组合的UWB测距脉冲设计

Histologic changes in repair of arte ry defects by vein autograft with ext ravascular stent

自体股静脉复合血管外支架修复股动脉缺损的组织学变化

At the same time puerarin injection 400mg was given by intravenous drip to the two groups for 30d.

两组均联合葛根素注射液400mg静脉点滴共30d。

We were interested in the shape of the complex in vertical cross-section.

我们对垂直横剖面的岩脉组合的形状感兴趣。

Study on Solidification Microstructure Characteristics of Fe-Based Alloys Subjected to Pulsed Electric Current Treatment;

脉冲电流处理铁基合金的凝固组织特性研究

A Study on Microstructure and Properties of AZ91D Alloy by Pulse Laser Melting;

镁合金AZ91D脉冲激光表面处理的组织和性能研究

Effect of Unipolar Rectangle Wave Pulse Current on Solidification Structure of Al-Cu Alloy;

单极方波脉冲电流对Al-Cu合金凝固组织的影响

Effect of Rectangle Wave Pulse Current on Solidification Structure of Al-Cu Alloy;

方波脉冲电流对Al-Cu合金凝固组织的影响

The Solidification Microstructure and Properties of Silver Alloy by Electrical Pulse Current

脉冲电流对银合金凝固组织和性能影响

The Single Attosecond Pulse Generated by Atom Exposed to Two-color Combined Laser Fields

原子在两色组合激光场中产生的单个阿秒脉冲

Pulse waveform design based on the combination of multiband APSWFs for UWB system

基于多频带APSWFs组合的超宽带脉冲波形设计

Effects of the synergic-pulsed MIG welding on the microstructure and properties of 2195 Al-Li alloy welds

双脉冲MIG焊对2195Al-Li合金焊缝组织及性能的影响

Analysis on Microstructrue and Property of Welded Joint of Cu-Be Alloy C17200 by Pulse Laser Welding

C17200铍铜合金脉冲激光焊接头组织性能分析

MIXER INVESTIGATION OF TURBOFAN ENGINE WITH PULSE DETONATION AFTERBURNERS

涡扇-脉冲爆震组合发动机内外涵掺混器研究

Studying Experimentally Performances of a Pulse Detonation Combustor (PDC) Integrated with a Turbine

脉冲爆震燃烧室与涡轮组合的性能试验研究

Study on the Optimizing Injection Protocols of Contrast Material in the Aortie Angraphy of MSCT

对比剂注射方案优化组合在主动脉MSCTA中的探讨