查询词典 HF

Hongfa production SNA Series Sizing Machine, WH series batches warper, WS Series Slitter warper, HF series of pulp and pulp dyeing machine yarn machine is simple and smooth operation of all-weather characteristics.

宏发生产的SNA系列浆纱机、WH系列分批整经机、WS系列分条整经机、HF系列浆染联合机和浆丝机具有操作简便和全天候顺利运行的特点。

Aurorae are also most commonly seen at polar latitudes at which location HF transmission is most likely to experience problems.

Aurorae 最共同地也被看见在地点HF 传输是很可能对经验问题的极性纬度。

Aurorae and large geomagnetic/ionospheric disturbances are associated and so VHF transmission by this means occurs at times when HF may be experiencing problems.

Aurorae 和大geomagnetic/ionospheric 干扰是伴生的和因此VHF 传输由这手段时常发生当HF 也许体验问题。

The first hyperpolarizability and molecular frontier orbit properties of barbituric acid derivatives are studied at HF/6-31G level by coupled perturbed Hartree-Fock method.

采用耦合微扰方法在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。

Shell Cassida Fluid HF 15, 32, 46, 68 and 100 are high performance, anti-wear, multi- purpose lubricants.

加适达HF 15、32、46、68和100润滑油均为高性能抗磨多用途润滑剂。

The structure and stability of all possible isomers of C50X(X=SiH2, PH, S) were investigated by ab initio HF/3-21G calculations. The calculation results indicate that the preferred position for cycloaddition of SiH2, PH, and S on C50 is consistent, i.e. on the C3-C4 and C4-C4 sites of C50, and the resultant most stable cycloaddition isomers are [5,6]-closed and [5,5]-closed structures. The main driving force governing the stability of the C50X(X=SiH2, PH, S) isomers is the strain, or the conjugative effect, or the combination of strain and conjugative effect, depending on the addition positions and the types of the attacked C-C bonds.

用从头算HF/3-21G方法研究了C50的环加成衍生物C50X(X=SiH2， PH， S)所有可能的异构体的结构与稳定性，计算结果表明，SiH2基团、PH基团与S原子在C50上环加成的优先加成位置相同，都为C3-C4类键和C4-C4类键，并且相应形成[5，6]-闭环和[5，5]-闭环结构的最稳定异构体；决定C50X(X=SiH2，PH，S)各异构体稳定性的主要因素，因加成位置以及发生加成反应的C-C键的单双键类型的不同，可能是张力、共轭效应或者二者的共同作用。

Geothermochronology based on mineral closure temperatures and geochronological methods such as U-Pb, Sm-Nd, Rb-Sr, Lu-Hf, Re-Os, 40Ar/39Ar, FT,/He, TIMS U-series, cosmogenetic nuclide (including 14C, etc.) and 3H/3He for young groundwater dating is reviewed in this paper.

简要介绍了基于矿物封闭温度的地质热年代学，并对多种地质年代学方法，包括U-Pb法、Sm-Nd法、Rb-Sr法、Lu-Hf法、Re-Os法、40Ar/39Ar法、裂变径迹测年、/He法、TIMS铀系法、宇宙成因核素定年（包括14C法等）和年轻地下水测年（如3H/3He法等）进行了综合评述。

Mechanism of rearrangement of semipinacone and cycloheptane cation were studied with HF method and STO-3G* basis set.

用HF方法，基组采用STO-3G*，分别对半片呐醇和环庚烷正离子的重排机理进行了从头算研究，计算了半片呐醇和环庚烷正离子重排过程中的各个状态的几何构型、零点能，同时对反应路径也进行了计算。

In this research FGA was synthesized through total ten steps such as epoxidation via H2O2, carbonyl protection, LiAlH2 reduction、carbonyl deprotection, epoxidation and ring opening with HF, oxidation, bromination and debromination et al.

设想通过对蕃麻二烯物进行H2O2环氧化、羰基保护、LiAlH4还原、羧基脱保护、溴羟环氧、HF开环、氧化、上溴脱溴等一系列反应得到FGA。

A simple method was developed for the preparation of W-doped Ag dendrites by using electroless deposition from a HF solution.

本文采用简单的无电沉积法在HF制备W掺杂的Ag树枝分子。

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！