hf的例句大全

A Study of ISAR Technique for Target Discrimination in HF Radar

ISAR技术在高频雷达目标分辨中的应用研究

The Target Signal Simulator for HF Ground Wave Radar

高频地波雷达目标回波模拟器

Theoretical calculation has been performed for the solvent effect and charge-separated excited state between tetracyanoethylene ( TCEN) and tetramethylethylene ( TME) by use of the ab initio method at the level of HF/ 6-31++ G and CASSCF ( 8,8)/ 6-31G.

用从头算方法，在HF/6-31++G和CASSCF（8,8）/6-31G基组水平上对四氰基乙烯与四甲基乙烯间电子转移的溶剂效应及电荷分离激发态进行了理论计算与研究。

Operating in the heavy congested SW band, HF radars use a quasi-random step frequency signal to avoid the interference bands.

高频雷达工作在电磁环境十分恶劣的短波段，为避开干扰严重的频段，采用一种准随机跳频信号。

Theoretical Design of Latest Gain Generator for Continuous Wave DF/ HF Chemical Laser s

连续波DF/HF化学激光器新型增益发生器的理论设计

Chapter 4 analyzes the different characteristics in spatial, temporal and frequency domain of HF interference.

第四章定性地分析了天波超视距雷达HF段干扰空、时、频域的不同特点，分别采用各种不同的处理方法进行有效的抑制。

Both the volume of HF and width of the temporal horn, width of lateral showed significant differences between the patients of AD and the control subjects ( p < 0.01).

左右侧海马体积、侧脑室颞角宽度、外侧裂脑沟根部宽度AD组与正常对照组之间存在着显著性差异（p＜0.01）。

Volumetric measurements of hippocampal formations ( HF), amygdala ( AMY), linear measurements of width of the temporal horn, and width of lateral were detected with MRI.

同时应用MRI测量颅腔结构，线性测量包括侧脑室颞角宽度、外侧裂脑沟根部宽度；体积测量包括海马体积、杏仁核体积，并进行统计学分析。

The HF coal ash concrete has the features of high tensile strength, high resistance to abrasion and small quantity of cement use.

HF高强耐磨粉煤灰混凝土具有水泥用量低、抗拉强度高、抗冲耐磨性能优质的特点，因此，极少产生裂缝。

Based on the fact that electric power is output from the HF terminal of the frequency converter, this paper analyzes the causes and harms of higher harmonics, as well as the reasons for the power cable oscillation radiation during transmission and their solutions.

根据变频系统高频输出电能特点，分析高次谐波产生原因和危害，并给出在电力电缆传输过程中产生振荡辐射的原因和解决方法。

However, the received performance of HF/ VHF communications is directly affected by Doppler frequency shift, which caused by transmission characteristics including terminal movement, fading, multi-path effects and other factors, thereby needs to be estimated accurately and compensated real-timely.

但是系统中终端的移动、衰落和多径效应引起的多普勒效应会严重的影响到接收性能。因此，准确实时的多普勒频移估计与补偿技术对于短波/超短波通信来说尤为重要。

Four terminal Pair HF Capacitor Standard Set

HFC型四端对高频电容标准

The four terminal pair HF capacitor standard set is used for calibration and verification of LCR meter.

HFC型四端对高频电容标准是为校准和检验进口及国产具有四端对连接头的自动LCR表的电容测试不确定度（无功分量技术特性）而设计和研制的。

A reaction kinetic model for synthesis of ETBE from ethanol and tertiary butyl alcohol, catalyzed by HF/ USY modified by hydrofluoric acid, was established.

以乙醇和叔丁醇为原料、氢氟酸改性USY分子筛为催化剂合成乙基叔丁基醚，建立了反应动力学模型。

Beam quality measurement for CW HF ( df) chemical lasers

连续波HF（DF）化学激光器采用非稳腔的光束质量测量

It has been indicated by TSD current spectra that the charge stability of the chemically treated PP films by extraction, oxidation, and HF solution is significantly improved while that of the HF-treated PET films becomes bad.

开路TSD电流谱的研究结果表明，经萃取、氧化和氢氟酸处理的PP孔洞膜的电荷稳定性得到显著的提高，而氢氟酸处理的PET膜的电荷稳定性较原膜显著地降低。

Construction of F Class Corrosion Pipeline in HF Alkylation Unit

氢氟酸烷基化装置F级腐蚀性管道施工

Synthesis of ETBE catalyzed by HF modified USY zeolites

氢氟酸改性USY分子筛催化合成乙基叔丁基醚的研究

A modified model for porous silicon formation is proposed and computer simulation has been carried out based on the dependence of the porous silicon microstructure on anodic current and HF concentration during porous silicon formation.

基于多孔硅生长过程中阳极化电流，氢氟酸（HF）含量与多孔硅微结构的关系，提出一个改进的多孔硅生长模型，并进行了计算机模拟。

Effect of HF Treatment on the Charge Storage Properties of PP and PET Film and Their Charge Dynamic Characteristics

氢氟酸处理对PP和PET储电性的影响及其电荷动态特性