查询词典 inversion problem

Based on the relations among the stress, final wall-thickness of thin-walled tube and the characteristics of tube material, original size, curling radius along with friction condition in a axially-compressed internal inversion process on right-angled fillet die, some analytical discriminants were established for judging if a double-layered tubular piece of aluminum alloy could be steadily formed from a certain-sized round tube via internal inversion process without interference and plastic instability of tube wall, and a method was put forward for determining the maximum and minimum usable curling radius or die fillet-radius for thin-walled tubes in the process.

基于薄壁管直角圆角模轴压内翻过程中各处应力及最终壁厚与管材特性、管坯尺寸、卷曲半径及摩擦条件之间的关系，推出了判别任一铝合金双层管件可否由特定尺寸圆管稳定内翻成形而不出现管壁干涉与塑性失稳问题的解析判别式，指出了确定薄壁管圆角模内翻卷曲半径或模具圆角半径极限值的方法。

Analyzing the velocity fault map on the basis of XIGA, using the inversion measurement of dislocation model, I get the inversion answer by using MATLAB calculation program. The results show that: the velocity in strike slip of fault is larger than those in dip slip between spot WT12 in the south of Yalung Zanbo River and spot SHOT in the north of that. The conclusion that there is strike fault between the two spots is conformed.

研究分析以日喀则为参考的速率断面图，利用Okada矩形位错模型进行反演，结合MATLAB计算程序，反演结果显示在雅鲁藏布缝合带以南的WT12与雅鲁藏布缝合带以北SHOT两个测站断层中走滑速率明显大于倾滑速率，验证了两者存在走滑断层的结论。

Based on the hypothesis of Cole-Cole model, a new recursive inversion method is used in the inversion of complex-resistivity sounding curves over multi-layered earth with Schlumberger array without electromagnetic couping.

在Cole Cole模型假设的基础上，用一种新的递推反演算法对无电磁偶合影响时的水平层状大地对称四极装置复电阻率测深曲线进行反演，得出了层状大地上视电阻率、视时间常数、视频率相关系数、视充电率的视真频参数测深曲线。

This dissertation gives the damping iteration method and geome-tric-mean tracing method, both based on inversion of observed ground-water level data, and also gives the proportional iteration (or ortho-gonalization) method based on inversion of hydrogeologic gradient data.

本文建立了用水位观测资料进行反演的阻尼迭代法和几何均值追踪法，利用水力梯度资料进行反演的比例迭代法。

In dealing with the upper singularity point of Abel inversion transfer, a zenith compensation term is introduced, which makes simple and stable in Abel inversion process.

在Abel积分变换的上奇点的处理中，推导了大气折射指数反演的天顶补偿项，使Abel积分变换的算法更简单而且更稳定。

It is suggested that the lubrication of water phase among the waterborne particles dominates at the phase inversion point,and phase inversion progress still continues with adding more water.

所以，体系在低乳化剂浓度时，发生了不完全相反转。

The steady model is able to predict the start and the end points of the phase inversion, although the model parameters have no distinct physical meanings. The factors, such as agitation strength, density, viscosity, interfacial surface tension, grafting efficiency and volume fraction etc., have been considered in the dynamic model, which can predict the start point of phase inversion successfully.

稳态模型的参数虽然没有明确的物理意义，但却能给出相转变过程的起点和终点；动态模型则从液液分散理论出发，综合考虑搅拌强度、体系粘度和密度、界面张力、接枝效率及相体积分率等因素的影响，能很好的预测相转变的起点，略加改进后该模型可以用于相转变的全过程模拟。

Combining with the analysis of flow pattern transition, the input water cut at phase inversion point is around 60%. The relational equations that water holdup is influenced by input water cut and mixture velocity are obtained before and after phase inversion point.

但随着入口体积含水率的增加，在一定的折算气液速的条件下，压力梯度出现了与转相相关的峰值特性，由峰值对应的液相入口体积含水率确定转相点对应的液相体积含水率为40%，明显低于油水两相流动时的转相点(入口体积含水率约为60%)。

Geosciences Department, Nanjing University, Nanjing 210093, ChinaAbstract With the development of exploration, the geophysicists focus their minds on the exploration and development of lithologic hydrocarbon reservoir and subtle pool. In recent years, seismic pre-stack inversion becomes the hot point of seismic attribute and inversion study.

随着油气勘探的不断深入，岩性油气藏和隐蔽油气藏的勘探开发问题日益受到勘探学家们的关注，地震叠前反演技术成为近年来地震属性分析和反演研究的热点。

Corresponding to the phase inversion point, a sharp peak in pressure gradient also appears at some gas and liquid superficial velocities. It is found that the input water cut of the phase inversion point for three phase flow which is around 40%, is obviously lower than that for two phase flow, which is around 60%.

采用互相关技术分流型研究了油-气-水三相分层流和环状流界面波速特性，结果表明：固定油水比时，SW‖ST流型气-油界面和油-水界面波速、AN‖DO/W流型和AN‖DW/O流型的气液界面波速均随折算气速和折算液速的增大而增大。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。