hf的例句大全

A method for the determination of trace As in coal by microwave digestion and hydride generation ICP-AES has been reported. The digestion system of HNO_ ( 3)-HCl-HF was evaluated.

建立了硝酸盐酸氢氟酸微波消解样品，氢化物发生ICP AES法测定煤中痕量砷的方法。

The causes of HF corrosion were analyzed. The corrosion problem was solved after the application of electroless of Ni-P plating in the alkylation unit.

分析了氢氟酸腐蚀原因，把Ni-P化学镀用在烷基化装置上，从而解决了腐蚀问题。

In the presence of Al 2O 3 and HF, the ashing temperature is raised to 1600 ° C, where the interference of HF is expelled.

Al（NO3）3的存在，将铍的灰化温度提高到1600°C，且消除溶解所引入的大量剩余氢氟酸干扰。

Harm of HF to human health and environment during the operation of HF alkylation units in PetroChina Dalian Petrochemical Company are summarized, the hazard and pollution source of HF are analyzed, and specific preventive measures are put forward.

综述中国石油某石化公司氢氟酸烷基化装置，在运行过程中HF对人身体和周边环境产生的危害，对HF的危险性和污染源做出分析并提出具体的预防措施。

The hydrofluoric acid-hydrochloric acid-nitric acid-vitriol ( HF-HCl-HNO_3-H_2SO_4) system was used for the determination of 15 rare earth elements in the ash of plant by inductively coupled plasma mass spectroscopy ( ICP-MS).

采用高温灰化植物样本，氢氟酸盐酸硝酸硫酸一次溶解植物灰分，电感耦合等离子体质谱法（ICP MS）同时测定15种稀土元素。

We found that the detection sensitivity of the mouse IgG microarray was dependent on preparing conditions of porous silicon substrate including etching current density, etching time, and concentration of HF.

实验发现兔抗小鼠IgG抗体检测的灵敏度与多孔硅基底制备时所采用的腐蚀电流密度、腐蚀时间、氢氟酸浓度有关。

The design of DCS in HF Alkylation unit, MTBE unit and Gas Separation unit is introduced.

介绍了氢氟酸烷基化装置、甲基叔丁基醚（MTBE）装置及气分装置等的DCS的设计。

The effects of HF concentration, current density and light illumination on material formation were also discussed.

讨论了制备中氢氟酸（HF）浓度、电流密度和光照等因素对材料形成的影响。

After HF acid etching under 5 different HF concentrations and 6 exposing times, shear bonding strength of porcelain to enamel were tested.

选择30个氢氟酸（HF酸）浓度－时间搭配点，测试瓷贴面复合体整体粘结抗剪强度。

A Study and Implementation of HF Serial Modem System

短波串行调制解调器的系统研究及实现

Performance Analysis of HF Serial Data Transmission Systems for CW Interference Rejection

HF串行数据传输系统抑制CW干扰的性能分析

The calculated absolute cross sections for ground state of HF have identical threshold energy and similar trend with experiment.

另外，反应物处于基态时的绝对反应截面与实验具有相同的阈能和上升趋势。

Precise analysis of zircon Hf isotopes by LAM MC ICPMS

锆石Hf同位素组成的LAM-MC-ICPMS精确测定

This paper mainly fulfills realizing the Real Time Channel Estimate ( RTCE) Technology of adaptive High-Frequency ( HF), which is one of the digital businesses.

本文主要完成数字化业务中的一项&高频自适应中实时信道估值技术（RTCE）的实现。

The Application of Neural Network in Estimation of Real Time HF Channel Parameters

神经网络的短波信道参数实时估算算法

They are relatively enriched in large ion lithophile elements ( Ba and Sr) and depleted in high field strength elements ( Nb, Ta, Zr and Hf).

富集大离子不相容元素（Ba，Sr），亏损高场强元素（Nb，Ta，Zr，Hf）；

Hf Isotope Composition and REE Pattern of Zircons from Early Precambrian Metamorphic Rocks in the Daqing Mountains, Inner Mongolia

内蒙古大青山地区早前寒武纪变质岩的锆石Hf同位素组成和稀土模式

As the first time, HF Doppler spectra of sea and land were obtained in China by using HF sky wave backscatter station of China Research Institute of Radiowave Propagation ( CRIRP).

用中国电波传播研究所高频天波返回散射探测站进行的我国首次陆地/海洋回波谱的实验研究，其中包括自行研制的实验设备，实验结果。

The position of the interface hf, flow rate Q, lower and upper level temperature T_2 and T_1 were investigated with thermal plume theory in the case of buoyancy force and buoyancy force assisted by wind.

分别考虑热压单独作用以及热压和风压相互加强作用的情况，用热羽流理论研究室内热分层高度h f，自然通风量Q，上、下层温度T2、T1的影响因素。

The effects of exposure to HF may be delayed depending on the strength of the solution.

根据溶液的浓度的不同，暴露于HF的影响可能会有延迟。