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。
In this paper, researched into the method of nonlinear optimization for obtained optimal HF radar work frequency, finished to optimize HF radar work frequency on-line real-time.
该文研究了在获得噪声频谱基础上，使用非线性优化方法获取雷达优质工作频率或频段，实现高频雷达工作频率在线实时优化选择。
The first hyperpolarizability and molecular frontier orbit properties of barbituric acid derivatives are 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和分子前线轨道性质进行了计算。
Constancy of chemical etch rate method was modified so as to reduce the influencing factors such as temperature and concentration of HF acid. The efficiency and accuracy are improved.
基于差动原理对HF酸恒定化学蚀刻速率法进行改进，以降低环境(温度、HF酸浓度等)变化对测量结果的影响，从而提高测量效率和测量准确性。
The method, which is used to design AGC model applied in HF digital receiver, is presented in this paper.
相对于模拟硬件电路设计的AGC而言，采用了一种用于短波数字接收机中自动增益控制(agc)的设计方法。
This article introduces the purpose, method and procedure of HF acid chemical clean for once through boiler, and comparison between chemical clean of different mediums is presented as well.
重点介绍直流锅炉氢氟酸酸洗的目的，方法及过程，还对不同介质的化学清洗进行了比较。
By immersing wet_etch method, slope angle of one_dimension step gratings is studied with fused silica and optimized etching liquor HF.
用浸没的湿法刻蚀方法，以熔石英为基板刻蚀材料，用优化配方的HF刻蚀液进行刻蚀，研究了HF刻蚀一维光栅台阶的斜坡陡度。
This method can be applied for the analysis of scattering problem of a target above the sea surface for HF over the horizon radar.
本文方法可应用于短波超视距雷达海上目标散射特性的分析。
A diagnosis method of zero-value insulator based on electromagnetic wave detection is put forward, namely partial discharge detection method jointly using UHF and HF.
提出了一种基于电磁波检测的零值绝缘子诊断方法，即联合采用基于(特高频)uhf和(高频)HF的局放电流检测方法。
In this paper, an online inspecting scheme of noise is introduced by employing the band sampling method, and the design of wave shape and the implementation of HF radar system are presented.
研究了采用带通采样的方法，实现HF雷达噪声频谱在线监测的原理，以及频谱监测的波形设计和系统实现。
After you've used this method, and start enjoying the wonderful world of HF radio, try a few CW QSOs.
你使用了这种方法后，开始享受高频无线电美妙的世界，尝试一些CWQ SO。
Finally, the method is applied to the measured data, and the results show that the proposed method is effective in HF-communication interference mitigation.
对实测数据的处理结果表明，该方法能有效地抑制高频通信干扰。
Discusses the application of Minimum Variation Method (MVM) in extracting sea echo's space spectrum from HF Ground Wave Radar (GWR) 's detection.
论述了将最小方差法应用于高频无线电海洋探测中的一些处理方法和结果。
It's a new method to design digital AGC of HF digital communication system based on DSP.
讨论了短波数字通信中数字agc的特殊性与DSP实现方案。
The silica xerogels were synthesized by ambient pressure drying method with hydrofluoric acid (HF) as catalyzer. The influence of catalyzer and drying method on the xerogels were analyzed.
以氢氟酸(HF)为催化剂，采用常压干燥法制备了二氧化硅干凝胶，分析了催化剂和干燥条件对干凝胶的影响。
The method of using mixture of HF and HCL to treat sandstone formations of remove formation damage near the wellbore is a widely used stimulation treatment.
使用土酸处理砂岩地层，解除井壁附近地层伤害，是广泛采用的一种增产措施。
The method of using mixture of HF and HCL to treat sandstone formations of remove formation damage near the wellbore is a widely used stimulation treatment.
使用土酸处理砂岩地层，解除井壁附近地层伤害，是广泛采用的一种增产措施。
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