等径的

Under the same situation as tube-diameter and so on, yield load and limited load increase with the increasing of steel tube ratio. But the steel tube ratios variety has ruleless to maximum displacement of the upper column.

2在钢管外径等其他属性相同的情况下，屈服荷载与极限荷载随含钢率的增大而增大，但含钢率的变化给柱顶最大位移带来的变化不具有规律性。

The research of the thesis can be divided into four parts:Part one. The cheap raw materials, such as soluble glass, HCl, MAA were used as reactant. A aggregation SiO2 powder with network-type was prepared by controlling the ratio of material, temperature, time, mixing speed, which has smaller size than that of products sold in the market.

本论文研究工作分为四个部分：第一部分：采用价廉的水玻璃和HCL、MAA、CO2酸化体系为原料，通过材料配比、制备温度、时间、搅拌速度等工艺条件的研究，制备出比市场上销售的二氧化硅粒径更小的呈网络附聚体形态的SiO2粉体。

The influences of impeller types, baffle configurations and gas sparger on critical speed of floating particle in an agitated vessel were investigated.

考察了釜径为386mm的搅拌釜内搅拌桨的类型、挡板和气体分布器等对自浮颗粒三相体系搅拌混合临界搅拌转速的影响，得到了回归的关联式：Ncr=CVSawbdcdSe，相对误差为3.34 %～11.58 %。

Zeta potential,density of surface carboxyl groups,the interaction between carboxyl groups and component in copolymerization emulsion,mechanical properties of films,state of water,particle diameter and distribution of particle diameter and theological behavior of emulsion were investigated by Zeta meter,the conductometric titration, particle size apparatus,dynamic mechanics analysis,differential scanning calorimmetry,scanning electron microscope,rheological apparatus,respectively, to study the mechanism on the water resistance of modified PVAc emulsion.

利用Zeta电位仪、电导滴定法、激光粒度仪、DMA、DSC、SEM、流变仪等手段从Zeta电位、表面羧基密度、羧基和乳液组分中的相互作用、羧酸改性后胶膜的力学性能、水的存在状态、粒径分布、流变性能和微观形貌方面探索了羧基提高乳液耐水性的机理。

Because It has stronger ability of resisting narrow band,multipath and jamming interference than that of the conservational communication systems,and also has advantages of concealed information and multiple access secure communication,thus the spread spectrum communication technology draws the people's attention more and more.

由于扩频通信系统与常规的通信系统相比，具有很强的抗窄带干扰，抗多径干扰，抗人为干扰的能力，并具有信息隐蔽、多址保密通信等优点，因而越来越受人们的重视。

We regarded he poetry of the unofficial poets as a carrier of their spirit and feelings, tried to find the clue which came from the Die hards in the early Qing Dynasty, and threaded through the developmentary Process of the poets' spirit.

清代布衣诗群承沿宋之江湖诗群、元之隐逸诗群、明代的山人群等在野诗群的心脉，在历时三百年的文化集大成时代别有新变，且渐已启开近代文学之畦径，处于古今文学迁变的转捩点上。

The purpose is to probe into fow characteristic pressure distribution of separator under primitive structure and improved structure.

介绍了旋风分离器的基础理论，包括数学模型，分离效率、阻力损失和临界粒径等旋风分离器的主要参数指标，并给出它们的一些研究现状和计算的经验公式。

The effect of the gasifier structure on gasification process and result was considered in this model.

利用建立的模型，对等径结构、颈缩结构和渐扩结构3种形式的分级气化炉进行了计算，得到温度、气体组成及其体积分数、碳转化率等参数沿气化炉炉膛的分布情况，并和连续气化的结果进行了对比。

The plastic hinge model of perforated liner casing is built up to calculate the collapse pressure according to the strength and deformation behavior of perforated liner casing subjected to external pressure. The calculation equations of collapse pressure of perforated liner casing with initial ovalization are deduced by energy method. The influences of phrase angle, diameter of perforation, shot density, initial ovalization, diameter-thickness ratio and yield stress on the collapse pressure of perforated liner casing are studied. The model and equations are used to calculate the collapse pressure of an actual perforated liner casing as example.

摘摇要：根据煤层气完井筛管受力特点建立了筛管受力的塑性铰模型，利用能量法推导出带有初始椭圆度筛管抗挤强度的计算公式，分析了相位角、射孔直径、射孔密度、初始椭圆度、径厚比和屈服强度等影响因素对筛管抗挤强度的影响规律，并对某煤矿使用的筛管抗挤强度进行了计算，与已有的实验数据和有限元计算结果进行了对比。

The plastic hinge model of perforated liner casing is built up to calculate the collapse pressure according to the strength and deformation behavior of perforated liner casing subjected to external pressure. The calculation equations of collapse pressure of perforated liner casing with initial ovalization are deduced by energy method. The influences of phrase angle, diameter of perforation, shot density, initial ovalization, diameter-thickness ratio and yield stress on the collapse pressure of perforated liner casing are studied. The model and equations are used to calculate the collapse pressure of an actual perforated liner casing as example.

根据煤层气完井筛管受力特点建立了筛管受力的塑性铰模型，利用能量法推导出带有初始椭圆度筛管抗挤强度的计算公式，分析了相位角、射孔直径、射孔密度、初始椭圆度、径厚比和屈服强度等影响因素对筛管抗挤强度的影响规律，并对某煤矿使用的筛管抗挤强度进行了计算，与已有的实验数据和有限元计算结果进行了对比。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。