特征参数

According to Shilnikov Theorem, on the condition that satisfies the basic characteristics of heteroclinic orbit, Shilnikov inequality and the eigenvalue equation, by finding a heteroclinic orbit consist of three geometric invariant sets, namely unstable manifold, heteroclinic point, and stable manifold, a set of real parameters accordance with the condition of existing heteroclnic orbit is obtained in this chaotic system.

根据Shilnikov定理，在满足异宿轨道基本特性、Shilnikov不等式和特征方程条件下，通过寻找该系统中一条由不稳定流形、异宿点和稳定流形三个几何不变集构成的异宿轨道，在分段Sprott系统中导出了存在异宿轨道时该系统中各个参数应符合的条件，并找到了一组对应的实参数，由此证明了异宿轨道的存在性。

The modelling methods of the system which can be described by the time series are studied, includes:(1) Generalized B-P neural network modelling method of stationary process.

它有别于以往描述系统的参数模型，它是用网络和与网络结构相对应的分布参数来整体描述一个系统的外观特征。

Distribution characters of the soil stress and its distortion were analyzed. The interaction relation among the character, and earth parameters and timbering parameters were clarified, and properties of region and structure of overlay soil for tunneling face was posted.

全面分析了围岩的应力与变形的分布特征及其变化规律，阐明了地层变位以及应力与地层参数、支护参数的相互关系；揭示了隧道上覆地层的区域性及结构性特点。

Based on Real-time detection data of toroidal coil and accident investigation records, this paper analyzed the mutation characteristics of traffic parameters and their relationship, also established a micro-simulation model of expressway accidents, in-depth analyzed the variation patterns of traffic parameters on the upstream and downstream of accidents, combined the traffic parameters to design three simulated variables.

基于环形线圈检测数据及事故调查记录，分析了快速路事故状态下交通参数的突变特征及参数之间的关系。

A general conic curve fitting is achieved with the standard conic curve parameters and translation matrix parameters and rotation matrix parameters.

推导了基于圆锥曲线标准表达形式参数，平移矩阵参数和旋转矩阵参数进行圆锥曲线特征拟合的理论。

This paper extracts the features of water demand of tropaeolum, which is controlled by machine vision technology, it builds up the multi-parameter fuzzy judgement model based on the colour values, R ,G,B,r,b , through fuzzy mathematics, which can meet the water need of tropaeolum growth and development, and verifies it by experimental data.

根据机器视觉技术对金莲花需水特征所提取的数据红色分量 R 、绿色分量 G 、蓝色分量 B ，以及 r 分量、 b 分量，利用模糊数学方法建立了金莲花生长发育健康需水多参数模糊评判模型，以减少单参数对其需水判定缺陷，并通过试验数据对模糊评判模型进行了验证。

As a result, the statistic feature of measurement error becomes different,and the derived rheological parameter estimation tends to be no unbiasedness and with the least variance.

钻井液流变模式的参数估计问题大多使用线性回归方法求解，然而，线性回归方法改变了测量误差的统计特征，使得所得到的流变参数估计不具有无偏性和方差最小等特点。

If adopting the reliability analysis approach for geotechnical engineering, the uncertainness of various influencing factors, especially uncertainness of geotechnical parameters and calculated approach must be considered. Based on these two influencing factors, it is thoroughly studied of the probability characteristic of geotechnical parameters and the reliability of limited bearing capacity of single pile, and a set of idiographic method and approach of reliability analysis is built based much engineering data collected in Hangzhou area.

对岩土工程采用可靠度设计方法，需要综合考虑各种影响因素的不确定性，尤其是土性参数的不确定性和计算方法的不确定性，本文针对这两方面因素，在收集杭州地区大量工程资料的基础上，对土性参数概率特征及单桩极限承载力可靠度进行了详细研究，建立了一套可靠度分析的具体方法和途径。

The multi-attributes and multi-parameters of 3D seismic data is studied through detailed processing and interpretation of 3D seismic data based on seismic model inversion and seismic reflector features recognition ,the relationship between reservoir and seismic attribute parameter is determined , and reservoir forestation is done , the response feature and three types recognition model for carbonate reservoir in seismic reflect cross-section are established, deepen the understanding of distributions of fracture and vug within this reservoir.

在地震模型正演和地震波形分析的基础上，通过对区内三维地震资料的精细处理解释，开展了地震资料的多属性、多参数综合分析，确定了储层和地震属性参数间的关系，开展储层预测及评价研究，总结碳酸盐岩缝洞发育带的地震响应特征，建立了3类缝洞碳酸盐岩储层识别模式，深化了对裂缝、溶洞发育带空间展布规律的认识。

Some welding parameters attribute values,such as current,voltage etc,were acquisited in GMAW process.

检测了熔化极气体保护焊中焊接电流和电弧电压大小等参数特征，利用数字信号分析与处理中的时域自相关特性原理，分析GMAW熔滴过渡过程的稳定性与参数关系，判断焊接电流和电压是否具有周期性。

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。