hf
- abbr. 高频（high frequency），尤指 3 至 30 MHz 的无线电频段；氟化氢（hydrogen fluoride），其水溶液为氢氟酸；（医学）心力衰竭（heart failure）；哈特里-福克（Hartree–Fock）方法；一半，二分之一（half）；（非正式）玩得开心（have fun）；无危险的（hazard-free）；测高（height finding）
- symb. 铪（hafnium，元素符号 Hf，原子序数 72）
专业释义英英释义
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高频 - 引用次数：201
Two models of converter transformers for calculation of high-frequency (HF) interference are proposed.
提出了两种用于换流站高频干扰计算的换流变压器模型。
参考来源 - 用于高频干扰计算的HVDC换流变压器模型高频 (high frequency) -
氟化氢 - 引用次数：7
The reaction mechanisms of mercury and HF during coal combustion were investigated by ab initio calculations of quantum chemistry. The geometry optimizations of reactant,transition state and product were performed and the activation energies were calculated.
在此基础上,应用量子化学从头计算研究了煤燃烧过程中汞与氟化氢的反应机理,优化得到反应物、过渡态和产物的几何构型,计算活化能,应用过渡态理论计算反应速率常数。
参考来源 - 煤燃烧中汞与氟化氢的反应机理研究 -
高频 - 引用次数：36
However, the HF subband is created by subtracting the synthesized LF subband from original image but not by 2-D high-pass filtering original image.
但是,高频子带并不是通过2-D高通滤波原始图像,而是通过原始图像与合成的低通子带相减得到的。
参考来源 - Contourlet变换在图像分析处理中的应用研究高频 (high frequency)谐波滤波器 (harmonic filter) -
液压悬架
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高频 (high frequency)
·2,447,543篇论文数据，部分数据来源于NoteExpress
hf
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n.
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a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
同义词： hafnium atomic number 72
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3 to 30 megahertz
同义词： high frequency
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a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
以上来源于: WordNet
柯林斯英汉双解大词典
hf
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1.
ABBREVIATION for half 一半; 二分之一
双语例句原声例句权威例句
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The first hyperpolarizability is studied at HF/6-31G level by coupled perturbed Hartree-Fock (CPHF) method.
采用耦合微扰（CPHF）方法在 HF/6-31G 水平上对巴比妥酸衍生物的第一超极化率进行了计算。
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And you have the bond energy in HF.
你得到氟化氢的共价能。
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And so this is the H-F bond in HF.
所以这是氟化氢中的氢氟共价键。
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Well, if we wanted to draw that, we have HF, whoops --It looks something like that.
如果我们想画他，哎呀，它看起来有点像那个某个东西。
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Now, if I get over here, HF, I know that fluorine is hogging the electron, so it is not equal sharing. It is over here.
那我们再看到这里，氟化氢，我知道氟在拉电子，所以它就不是平均共价。
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Hf What's my heat of formation? Delta Hf.
生成热是什么？△
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