查询词典 HF

The feldspars of topaz-lepidolite granite in Yashan late stage are P-rich albite and Kfeldspar, and the phosphorus goes into feldspar structure in the form of PAlSi〓 substitution. The phosphorus contents of feldspars vary according to their crystal habitus. In general, the feldspars of later generation have the higher average phosphorus content than that of earlier generation, and the albite contains higher phosphorus than the K-feldspar in the same generation. The zircon is highly rich in Hf, U, P and Al. The phosphorus enters the zircon structure mainly by the form of〓P〓〓Si〓, Al〓P〓Si〓 or P〓Al〓Si〓, Zr〓 substitution. The P-rich zircon is the production of the highly evolved magma, and it might be one of the important characteristic minerals of the high-P subtype granite. The manganocolumbite, manganotantalite, wodginite and titanowodginite are the main niobium and tantalum minerals.

雅山晚阶段黄玉锂云母花岗岩的长石矿物是富磷长石，磷以PAlSi〓替换方式进入长石结构中，并且在长石中的分布很不均一，一般是晚结晶的长石比早结晶的长石的磷含量高，同期结晶的钠长石比钾长石的磷含量高；锆石矿物为高度富铪、铀、磷和铝的锆石，磷主要以(Y， HREE， Fe)〓P〓〓〓Si〓〓、Al〓P〓Si〓〓、P〓Al〓Si〓〓Zr〓〓等替换方式进入锆石晶格中，富磷锆石是岩浆高度演化的结果，是高磷花岗岩的特征矿物之一；雅山含有丰富的磷锂铝石，是高磷花岗岩的主要磷酸盐矿物；铌—钽矿物主要有铌锰矿—钽锰矿、锡锰钽矿—钛锰钽矿、细晶石等。

Our method has been proved to be successful for the purification of HF from Naja naja atra venom.

本方法成功地从广西眼镜蛇蛇毒中纯化出降血压成分。

In this paper, high-level quantum chemistry calculation methods are used to theoretically investigate basic configuration, conformers, torsion potential energy surface and internal rotation transition state of oxalic acid and oxalyl halides.

第三章采用量子化学的MP2、B3LYP、HF计算方法在6-311++G~水平上，对草酸可能存在的十三种构型进行完全放开的全几何优化及振动频率分析，得到八种稳定构型和五种内转动过渡态构型。

Photoluminescent porous silicon was prepared by electrochemical dissolution of silicon wafer in HF solution.

在本文的第一章中，对当前多孔硅研究领域的研究成果进行了综述。

RoyalRay series high power, medium power HF tag readers are designed upon fully self-intellectual property. Based on proprietory efficient anti-collision algorithm, they features excellent tag read/write operation performance with high identification rate. They can be widely applied in many RFID application systems such as logistics, personnel identification, conference attendance, access control, anti-counterfeit and industrial production process control.

荣睿系列大功率、中功率电子标签读写器基于完全自主知识产权设计，结合专有电子标签解码核心与处理算法，在保持高识读率的同时，实现对电子标签的快速读写处理，可广泛用于物流、个人身份识别、通道管理、门禁、防伪及生产过程控制等诸多RFID系统应用领域。

By switching between polarities, arc reignition is made easier so that the HF can be reduced or eliminated.

两极之间的切换，电弧重燃更容易，高频可以降低或消除。

According to the phenomena of high-frequency reignition after the interruption ofthe line current by vacuum interrupter s,the auther analyses and discusses some factors thatinfluence the interrupting characteristics of the HF current of vacuum inlerrupters.

本文结合真空断路器开断工频电流后所产生的高频重燃现象，对影响真空断路器高频电流开断特性的一些因素进行了分析和探讨。

XRD results reveal that the addition of HF decreases the defects in the crystal lattice of SAPO 34, which is proved by the two distinct double peaks at 2 θ=26°and 31° and other ...

以氟化氢三乙胺复合模板剂合成的分子筛，在催化甲醇制低碳烯烃反应中结焦速率降低，生成乙烯及丙烯的选择性则略有提高

First, the thermal resistance of three heat sink related to Re and H / D was obtained separatively, and the average Nusselt number equation of the simulated chip surface under the three heat sinks related to Re and H / D was got separatively by least square method too.

首先，分别获得了这3个热沉的热阻随 Re 数及 H / D 变化的实验数据和对应这3个热沉的模拟芯片表面的平均努塞尔数随 Re 数及 H / D 变化的实验数据；其次，选用合适的函数形式对实验数据采用最小二乘法拟合，得到了此实验条件下关于 Re 、 H / D 及肋片高度 Hf 的准数方程。

The source profile and relative contribution to receptor of determined soil/fly ash,constrction locate,incinerator,sea spary,exaust and non-ferror was deduced by PMF2. Among them,soil and fly ash contributes 40% to receptor.Enrichment factor analysis were also performed to identify possible sources in Beijing urban area with die data measured in the study.

通过对富集因子分析得出Fe，Sc，Ti的EF近似等于1，验证了针对于本采样地区它们都是较好的参考元素：Al，Ba，Ca，Ce，Mg，Dy，La，Lu，Sm，Tb，Ta，Th，Hf，Sc，Fe，Ti等的富集因子接近于1，表明了它们的土壤／灰尘来源：来自人为污染排放源的As，Br，Cd，Hg，I，In，Se，Sb，S，Zn等在粗、细颗粒物上都具有较高的富集值，特别是在细颗粒物上的EF明显高于粗颗粒物。

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！