查询词典 fluorine

A halocarbon in which some hydrogen atoms have been replaced by fluorine; used in refrigerators and aerosols.

一种卤烃，其部分氢原子已被氟替换，用于电冰箱和喷雾剂中。

Any of various halocarbon compounds consisting of carbon,hydrogen,chlorine,and fluorine,once used widely as aerosol propellant s and refrigerants.

含氯氟烃由碳、氢、氯及氟构成的卤烃化合物，曾经作为喷雾容器中推进剂及致冷剂被广泛使用，含氯氟烃被认为会导致大气臭氧层的枯竭

Any of various halocarbon compounds consisting of carbon, hydrogen, chlorine, and fluorine, once used widely as aerosol propellants and refrigerants.

含氯氟烃由碳、氢、氯及氟构成的卤烃化合物，曾经作为喷雾容器中推进剂及致冷剂被广泛使用，含氯氟烃被认为会导致大气臭氧层的枯竭

Fluorine Chemical Company as the leading enterprises in this area does have the technical capacity and technical reserves, such as alternatives to halon F227, or the field of non-refrigerant used.

氟化工公司在这一领域的龙头企业确有足够的技术能力，如对哈龙F227，还是非传统安全领域，制冷剂的替代技术储备。

Indeed, the carbon-fluorine bond at the heart of Teflon cookware is so helpful we also use it in clothing, lubricants, refrigerants, anesthetics, semiconductors, and even blood substitutes.

实际上，Teflon炊具的核心物质碳氟键有着广泛用途，我们还把它用到衣物、润滑剂、制冷剂、麻醉剂、半导体，甚至血液替代品里面。

Trees have adsorption, absorption of pollutants or impede the spread of pollutants, trees absorb SO2, nitrogen oxide, hydrogen nitrogen compounds, Cl, fluorine compounds and Hg, Cr, and other heavy metals.

树木具有吸附、吸收污染物或阻碍污染物扩散的作用，树木吸收SO2、氮氧化合物、氮氢化合物、Cl、氟化合物和Hg、Cr等重金属。

Multiple-paths hydrogen abstraction reactions of fluorine -with CH_3OH have been investigated at the MP2/6-311 ++ g level. The potential energy surfaces for H-abstraction reaction from carbon atom and oxygen atom were given respectively. The results indicate that there is only one minimum energy path for hydrogen abstraction from carbon atom, while multiple paths were found for hydrogen abstraction from oxygen atom. All the stationary structures, frequencies as well as PES sketch of all channels were given, in which the dominant channel is by a five-member ring transition state. The calculated heat of reaction is 170.62 kj/mol for channel 1, 119.41 kJ/ mol for branch channel 6. The results are in good agreement with experimental data.

以MP2/6-311 ++g水平上详细研究了氟原子与甲醇抽氢反应的多通道反应机理，得到了各条通道中涉及的驻点的构型和振动频率及其能量，给出了两张完整的反应势能面，结果表明，氟原子从C原子上抽氢时有一条明显的最低能量通道，而从氧原子上抽氢时要涉及多条分支通道和多个驻点构型，给出了各分支通道势能面示意图，结果表明以形成五元环状过渡态通道为优势通道，计算得到经途径1生成CH_2OH时反应放热170.62kJ/mol，经分支途径6生成CH_3O自由基时反应放热119.4 kJ/mol，此结果与实验值一致。

Fluorination modification and electret properties were studied on the cellular polypropylene films modified by gaseous fluorine, by attenuated total reflection infrared analysis and the measurings of open-circuit thermally stimulated discharge current and in situ TSD charge and isothermal charge decay.

通过衰减全反射(Attenuated Total Reflection， ATR)红外光谱分析与开路热刺激放电（Thermally Stimulated Discharge， TSD）电流、原位实时电荷TSD和电荷等温衰减的测量，本文研究了氟气对孔洞聚丙烯膜的氟化改性及氟化改性对其驻极性能的影响。

It discloses four kinds of diamino monomers such as 1, 4-(4- amnio- 2- trifluoromethyl- phenoxy)- 2-(3'-methyl phenyl)benzene containing fluorine, ether linkage and benzene side chain.

具体公开了四种含氟、醚键和苯侧基的1，4-(4-胺基-2-三氟甲基-苯氧基)-2-(3'-甲基苯基)苯等二胺基单体。

Isolators material: Acid stainless steel, stainless steel containing molybdenum, fluorine plastics.

隔离器材料：耐酸不锈钢，含钼不锈钢，氟塑料。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。