查询词典 inversion curve

First, basing on point halving, this thesis proposed a new efficient algorithm of computing kP lQ on an elliptic curve over the finite field with characteristic 2 and analyzed the computational efficiency. When the ratio I/M of inversion to multiplication cost is small, this new algorithm is about 5%～30% faster than the traditional algorithms.

首先，基于半点运算给出一种计算特征为2的有限域上椭圆曲线双标量乘法kP lQ的新算法并分析了效率，当基域上求乘法与求逆的运算时间的比值比较小时，新算法的效率比已有算法提高5％～30％。

The result of processing dual laterolog successive curve indicate that the inversion method performance well.

通过实际多口井连续曲线的反演处理表明，本文提出的反演方法合理而且有效。

Aiming at the process of reservoir prediction,when wave impedance is not effectively identified sandbody,this paper proposes an inversion method of effective rebuild acoustic curve to use well log curve to develop reservoir inversion.

针对储层预测研究过程中，当波阻抗不能有效识别砂体时，如何利用对储层有良好分辨能力的测井曲线开展储层反演研究工作，提出一种行之有效的重构声波曲线反演方法。

In order to enlarge capacity building size and to enrich exploitation seismic interpretation methods, gamma log curve without container rock velocity information and resistivity logging curve were converted to realize the purpose of seismic inversion as pseudo sound wave curve, and to make the seismic inversion data volume have information of shale content and oiliness and help to predict the sandstone thickness and oiliness of reservoir bed.

为扩大油田产能建设规模、丰富开发地震解释方法，本文把不具备储层速度信息的伽玛曲线、电阻率曲线通过一定的转换，实现作为伪声波曲线进行地震反演的目的，使地震反演数据体加入泥质含量及含油性两种信息，有助于进行储层砂岩厚度预测及储层含油性预测。

Through the correlation analysis of log curve, AC is reconstructed with the chosen SP and GR.Then seismic inversion is carried out.The result can well distinguish the sand from the mudstone.It also reflects the sand horizontal distribution and the vertical thickness, which can effectively guide the production.

通过测井曲线相关性分析，选择自然电位、自然伽马曲线重构声波曲线，然后用重构声波进行地震反演，反演结果很好地区分了砂泥岩、反映出砂体的横向展布特征和纵向厚度，有效地指导了生产工作。

The results show that the porosity of the membrane prepared by ScCO_2 induced phase separation is higher than that prepared by conventional method;the membrane structures are significantly influenced by the process parameters;compared with the conventional immersion precipitation phase inversion,ScCO_2 induced phase separation process can effectively avoid the formation of macrovoids at suitable operating conditions;during depressurization process,the great differences in the effect of depressurization time on membranes structure for various polymer materials result from that the speed of CO_2 gaseous nuclei escaping from membrane substrate can not keep the pace with the outer depressurization rate.(2) The tendency that the interaction parameters affect the binodal curve position is illustrated by changing the interaction parameters in reasonable ranges.

研究结果表明：与传统方法相比，采用ScCO_2诱导相转化法可获得更高的膜孔隙率；通过改变操作参数可对膜的结构进行调控，且操作参数对膜结构的影响与铸膜体系的自身性质也紧密相关；在适宜的操作条件下，ScCO_2诱导相转化法能有效避免采用传统的浸入沉淀相转化法制膜时易出现的大空腔结构；泄压过程中CO_2气核从聚合物膜基体中逃逸的速度能否与膜基体外部的泄压速度保持同步，是泄压时间对不同材质膜结构影响截然不同的根源所在。

However, various methods are used to suppress surface waves from shooting to receiving in the process of seismic survey, thus research should be carried out in the following aspects:① joint inversion with surface wave, refraction first break and microlog data;② offset range and the relation between group interval and surface resolution suitable for use in surface wave analysis;③ the influences of lateral relief of array on propagation of surface waves;④ method for Hi-Fi purification of surface wave signals;⑤ method for extracting dispersive curve through time-frequency analysis;⑥ forward modeling and in-version methods of surface wave in view of three-layer structure.

但石油勘探从激发到接收，都采取各种方式来压制面波，因而需要开展多方面的研究：①结合面波、折射初至波和微测井信息的联合反演；②地震记录中适合面波分析的炮检距范围、道间距与表层分辨率的关系；③排列横向地形起伏变化对面波传播规律的影响；④高保真提纯面波信号的方法；⑤运用时频分析提取频散曲线的方法；⑥针对三层结构的面波正反演方法。

In the process of experimental data,it is found that there is non-uniqueness in inversion of creep curve and parameters of rock.

在对实验数据的处理过程中发现岩石蠕变曲线的反演具有蠕变模型的不唯一性和蠕变参数随时间变化的不唯一性。

In order to predict the post-construction settlement, based on a thorough analysis on the law of settlement development, citing the Verhulst model which good reflect its main characteristic, using the curve fitting method, mining the information contained in the construction data; betakes the improvement non-linear fitting algorithm on the model parameter inversion.

目的 为提高软土路基的工后沉降量预测精度，给设计和造价控制提供反馈信息。方法在深入分析沉降发生发展规律的基础上，引入Verhulst模型，采用改进的曲线拟合的经验计算方法，挖掘施工期的实测数据所蕴含的信息。

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。