含蒸汽的

A hydrogenation catalyst contained Co-Mo-Ni active component was used for preparation of pentane with the raffinate of 5-carbon fraction from steam cracking as the raw material.

对活性成分为Co-Mo-Ni的LY-9702加氢催化剂催化蒸汽裂解抽余C5馏分(含60％左右的C5烯烃)制戊烷的工艺条件进行了试验研究。

In accordance with the correlative analyze on the exeperimental data of non equilibrium phase state between water-vapour single component biphasic system and condenste gas biphasic system, it is found that gas-liquid balance time has exponential relationship with pressure and gas-bearing ratio and shares the same rule with water-vapour single component biphasic system.

对水－蒸汽单组分两相体系和凝析气两相体系的非平衡相态实验数据对比分析研究发现，凝析油气体系气液平衡时间与压力和含气率的关系具有指数关系形式，与水－水蒸汽单组分两相体系的非平衡相态规律相同

Density Functional Theory method was used to optimize the geometries of 209 PCDE molecules, 209 PBDE molecules and 75 PCDD molecules at the B3LYP/6-31G* level. Using computed structural parameters as theoretical descriptors, the forward stepwise multiple regression technique was adopted to obtain QSPR models of environmental partition properties for these POPs by using GQSARF 2.0 and SPSS12.0 for windows programs. The obtained QSPR models are as follows:(1) QSPR models for predicting subcooled liquid vapor pressure, n-octanol/water partition coefficients lgK_(ow and subcooled liquid water solubilities -lgS_(w,l of PCDEs, of which correlative coefficients (R~2) are 0.988, 0.958 and 0.959 and the root-mean-square-error of estimation are 0.134, 0.116 and 0.327 respectively.(2) QSPR models of lgPL and n-octanol/air partition coefficients lgK_(oa for PBDEs, which both contain three structural parameters. The values of R2 for the two models are both 0.997 while the values of RMSEE are 0.073 and 0.062 respectively.(3) QSPR models of lgKow and–lgS_ for PCDEs, which both have one variable (mean molecular polarizability,α). The values of R~2 for the two models are 0.978 and 0.866 and the values of RMSEE are 0.300 and 0.270 respectively.(4) The molecular structures of 24 substituted naphthaline compounds were optimized using Hartree-Fock and DFT methods at four different levels and the same means was used to obtain four three-parameter (EHOMO, q~+ andα) QSPR models of lgK_. The model at the HF/6-311G** level is the best one of which R2 is 0.9662 and RMSEE is 0.380.(5) QSPR study for environmental partition properties of PCDEs was also performed using position of Cl substitution method in which simple parameters of substitution position were taken as descriptors. The multiple linear regression was performed with GQSARF 2.0 and SSPS 12.0 for windows programs to obtain QSPR models of lgP_L, lgK_ and–lgS_ for PCDEs of which R~2 are 0.991, 0.983 and 0.965 and RMSEE are 0.311, 0.100 and 0.300 respectively.

采用密度泛函理论方法在B3LYP/6-31G*水平上对PCDEs、PBDEs和PCDDs的分子结构进行了全优化计算，以计算得到的量子化学参数作为理论描述符，采用GQSARF 2.0和SPSS 12.0 for windows统计程序进行正向逐步回归分析，建立了这些POPs的环境分配性质的QSPR模型：(1) PCDEs的过冷液体蒸汽压、正辛醇/水分配系数lgK_(ow和水溶解度-lgS_(w，l的QSPR模型，这3个QSPR模型的相关系数(R2)分别为0.988、0.958和0.959，估计的均方根误差分别为0.134、0.116和0.327；(2) PBDEs的lgPL和正辛醇/空气分配系数lgK_(oa的QSPR模型，这两个模型都包含三个分子结构参数，其R~2都为0.997，RSMEE分别为0.073和0.062；(3) PCDDs类化合物的lgK_和-lgS_w的QSPR模型，两个模型都只含一个变量，其R~2分别为0.978和0.866，RSMEE分别为0.300和0.270；(4)采用Hartree-Fock和DFT方法，在4种不同水平上优化计算了24个取代萘系列化合物的分子结构，采用上述同样的方法分别建立了四种水平上的三变量lgK_模型，通过比较得到，在HF/6-311G**水平计算得到的模型最好，R为0.966，RSMEE为0.380；(5)同时，采用氯原子取代位置方法对PCDEs的环境分配性质进行QSPR研究，建立了PCDEs的lgPL、lgK_和-lgS_的QSPR模型，其R~2分别为0.991、0.983和0.965，RSMEE分别为0.110、0.100和0.300。

The samples made by steam distillation do not contain any high-boiling and non-volatile materials and no contaminants are introduced to GC; but highly polar or hydrophilic compounds are not easy to be extracted.

蒸汽蒸馏方法制备的样品通常不含高沸点或非挥发性组分，不会对GC造成污染；但一些极性大或亲水的组分不易分离出来。

A mixture of hydrogen and carbon monoxide with small amounts of other gases; made by blowing steam over hot coke or coal.

一种含氢、一氧化碳和少量其他气体的混合物，将蒸汽通过加热的焦炭或煤而制得。

Based on the experime ntal researches some of heat pipe apparatus are developed, such as, giant heat p ipe steam generator, high temperature heat pipe air furnace and separate-type heat pipe steam generator at high temperature and with high heat flux. All of t hese show the progress of heat pipe tec hnology research and development in recent years.

在试验研究的基础上，又相继开发了一系列热管设备，如高含尘气体下的大型热管蒸汽发生器、燃煤高温热管热风炉以及高温高热流密度下的分离式热管取热器，从而反映了近年来热管技术研究开发的一些进展情况。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。