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The experiments for determining the reaction kinetics of Daqing atmospheric residue were performed in a continuous flow, expanded bed rector. Four-lumped reaction kinetic model was developed to account for various feed and product fractions of Daqing atmospheric residue (gases, gas oil, residue and coke). The amounts of olefins and alkyls in the gas products were further analyzed to determine reaction kinetics of gas product distributions. Hence, a combined five-lumped reaction kinetic model was obtained for catalytic pyrolysis of Daqing atmospheric residue. The kinetic constants both in four-lump model and five-lump model were evaluated. A simulator for catalytic pyrolysis process was developed by incorporating the five-lumped kinetic model into the hydrodynamic flow model.

其次利用改进的固定流化床装置考察大庆常压渣油催化裂解反应规律，筛选反应工艺参数；分析了催化裂解工艺存在的主要化学反应类型，提出了渣油一次反应和二次反应网络图；将反应原料油作为单独集总组分，而将产品中的轻质油、气体、焦炭分别作为集总，从而建立了四集总动力学模型；在此基础上，把气体产物中的目的产物低碳烯烃独立划分，得到五集总动力学模型；采用最小二乘法分析实验数据，分别得到四集总动力学模型和五集总动力学模型中各集总间相互反应转化的反应速率常数。

Due to its robustness to non-normal distributions and outliers, the median was used to estimate the impedance amplitudes.

由于其鲁棒性的非正常分布和离群，中位数是用来估计阻抗振幅。

In order to control retrogradation of instant rice during storage,the degree of gelatinization was used to investigate the effects of water content,time,distributions of the chain lengths and amylases on ret- rogradation of instant rice .

针对即食方便米饭在贮存过程中易老化的问题，以糊化度为实验指标，研究水分含量、贮存时间、淀粉外支链链长分布对其老化的影响。

Objective To investigate distributions and correlation of HCV antigens in the liver tissues.

目的研究丙型肝炎病毒抗原在患者肝组织中的分布状况及其相互关系。

In this paper, the 3DMove fracture prediction technique is used to predict the distributions and azimuths of fractures in two sets of strata at the top of Archaean Group and Paleozoic Group, and the stretch degree of fracture is analyzed in terms of stress field.

本文应用3DMove构造正反演裂缝预测技术预测古生界潜山顶和太古界顶两套地层的裂缝分布和方位，并从应力场的角度对裂缝的开启性作出分析。

We find that optical vortices could be efficiently formed and generated due to the interference and superposition effect of all the beamlets, during the propagation process of the coherent radial laser arrays with the initial well-organized phase distributions through the free space, the resulted beam in the far field has the strong rotation effect with the phase helicity.

我们发现具有确定初始相位的、圆径向对称分布的相干激光阵列光束在传播的过程中由于干涉和叠加效应可以形成螺旋形的位相分布且保持光束中心强度为零，即形成光涡旋。

The researched results indicate that the axial shift of CVC intermediate roll,the bending of work roll and the bending of intermediate roll have outstanding influence to the transverse distribution of rolling pressure,and clear influence to the transverse distributions of the pressure betweens roll s.

结果表明，CVC中间辊横向移动、工作辊弯辊和中间辊弯辊等手段，对轧制压力的横向分布影响很大，对辊间压力的横向分布也有明显影响。

METHODS: Colonoscopic pictures from 300 HIV-negative patients (3000 pictures in total) and 32 HIV patients (600 pictures in total) with chronic diarrhea due to nonspecific colitis were comparatively analyzed. The pathological sections from the 32 HIV patients were observed for analyses of capillary vessel distributions and mucosal bleedings in lamina propria.

将同期不同症状和病因32例HIV非特异性慢性结肠炎腹泻患者600张电子结肠镜照片与300例非HIV患者3000张结肠镜照片对比，并对32例HIV非特异性慢性结肠炎腹泻患者病理切片内固有层内毛细血管分布情况和黏膜内出血情况进行分析。

According to the effects of nonlinear potentials on symmetries and their strength distributions, one is able to predict the existing discrete breathers in a given system, which is real helpful to theoretical analysis and numerical calculation.

根据各非线性势能系数对解的对称性的影响以及不同大小的非线性势能函数对解的影响强度的分布，可以对特定系统中可能存在的离散呼吸子解进行预测。

Objective To know the species and distributions of carnivores and small mammals in Sanjiangyuan area.

目的 了解三江源地区食肉动物和小型兽类的种类与分布。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。