查询词典 HF

By using a test method featuring artificially accelerated corrosion an investigation was conducted of the impact of power plant tail portion flue gas on the concrete of a smoke stack.

采用人工加速腐蚀实验方法，研究了电站尾部烟气对烟囱混凝土的影响。对在H2SO4、HCl和HF酸液下的低温腐蚀进行了比较研究。

The corrosion behavior of the microwires in aqueous HF solution and melting NaOH were investigated respectively,and the anti-corrosion property of glass-coated pure copper microwires in strongly acid and strongly alkali were analyzed with the corrosion mechanism being discussed.

采用熔融纺丝法制备了玻璃包覆纯铜微丝，对微丝表面玻璃包覆层的去除进行了实验研究，评价了微丝在氢氟酸和熔融氢氧化钠中的腐蚀行为，分析了玻璃包覆纯铜微丝在强酸和强碱中的耐腐蚀性能，探讨了其腐蚀机理。

Overall heat transfer coefficients for metallic stirred reactors are about 40 Btu/h-F- ft^sup 2^; for glass-lined reactors they are lower, around 30 Btu/h- F-ft^sup 2^.

金属整体加热搅拌反应器传热系数约40 Btu/hF-英尺2 ^ ^燮，为搪玻璃反应堆他们较低，约为30 Btu/h-的F -英尺2 ^ ^燮。

Describes a numerical model which is applicable in the study of wide beam HF ground wave radar's signal processing.

根据高频无线电波海洋回波谱理论，结合高频地波雷达单站探测的实际应用，建立了一个适合于研究高频地波雷达信号处理的海面回波多普勒谱的数值模型。

Being associated with three research projects, this dissertation makes deeply insight into the fast and accurate analysis, optimal design and manufacture of HF and VHF/UHF broadband omnidirectional miniature loaded wire antennas, loaded helical antennas and multiple-tuned VLF inverted L valley span antennas.

本文密切结合&十五&国防预研项目&软件无线电天线&和&宽带小型化天线&以及国防重点项目&某长波台发信天线电气参数分析与设计&等项目，研究了短波和超短波频段上的宽频带加载线天线、加载螺旋天线和超长波倒L形多路调谐山谷天线的快速精确分析、优化设计以及样机制作。

The iron deficiency anemia was not associated with the expected decrease in ferritin concentrations, which could be the result of inflammation accompanying HF, Nanas et al note in the Journal of the American College of Cardiology.

Nanas等研究者在《美国心脏病学会》杂志称缺铁性贫血并非预期所认为的因铁蛋白聚合物降低引起，他们发现可能由心力衰竭的炎症引起。

The built-in, multi-waveform modem and 600/2400 bps vocoders provide high data throughput and secure digital voice over the most challenging HF channels.

内置多波形调制解调器和600/2400bps语音编码器提供高数据传输量，通过最具挑战的高频通道进行安全的数字语音。

This thesis examines the design of the physical layer for an OFDM system utilising novel digital signal processing algorithms.

基于DFT的正交频分复用技术的提出，为HF通信频谱利用率与传输速率问题提供了新的解决方案。

In the case of scarce practical data and priori knowledge,modeling of the transmission loss of HF skywave to give guidance to the practical system is a very difficult problem in communication countermeasure simulation system.

如何在实际数据和先验知识较少的情况下，建立适用于通信对抗仿真系统的短波天波传输损耗计算模型来为实际系统提供指导，是通信对抗仿真中一个非常棘手的问题。

Communication countermeasure simulation system ; HF skywave transmission loss ; Simulation procedure ; Simulation model

通信对抗仿真系统；短波天波传输损耗；仿真流程；仿真模型

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！