[Methods] Exponential curve was employed in studying time series of typhoid and paratyphoid(1997-2003) and incidence rate of year 2004 was predicted based on the prediction model.
[方法]对伤寒、副伤寒发病率时间序列(1997~2003)采用指数曲线拟合,并对2004年伤寒、副伤寒疫情作出预测。
Based on the data feature of oversea tourist in Jiangsu province from 1998 to 2005,three forecast models are adopted separately,namely the back-propagation neural network model,the GM(1,1) model and the exponential curve model.
本文根据1998年~2005年江苏省入境旅游客源数据特征,采用BP神经网络模型、GM(1,1)模型以及指数曲线模型分别进行预测,然后结合这三种预测方法的特点,提出非负权重组合预测模型,通过实例运算的对比分析,证明组合预测模型具有很高的准确性。
Determination of the power law exponent of polymer solution in condition of oil reservoir;
油藏条件下聚合物溶液幂律指数的确定
The influence of Weissenberg number and power law exponent on the flow field is analyzed .
研究表明,在扩张流道中,随着幂律指数的逐渐增大,速度等值线逐渐向凹角内伸展,流动区域增大;随着粘弹性的增强,流体的波及体积增加,波及效率增大。
The influence of Weissenberg number and power law exponent (n) on the flow field is analyzed.
在凹槽流道中,随着幂律指数的逐渐增大,速度等值线逐渐向凹角内伸展,流动区域增大;随着黏弹性的增强,流体的波及体积增加,波及效率增大。
The paper provides the theorem of the limit of combination of power and exponent function,which gives us a new method to work out the limit of this kind of function.
给出了幂指函数极限定理,对求幂指函数极限的方法进行了讨论,并给出一些应用实例。
The method of finding the derivative by combination of power and exponent function normally lies in the application of the logarithm.
对于幂指函数求导数一般采用取对数求导法,在幂指函数求导数中,可把指数看作常数的复合函数的导数与把底数看作常数的复合函数的导数之和进行求解。
time-contrast-index curve
时间-反差指数曲线
Harvard ABC curve
(三项指数曲线) 哈佛ABC曲线
An exponential curve, eg on a graph indicating population increase
指数曲线(如人口增长示意图上的)
Parameter Estimation and Error Aanalysis of Forecasting Model of Exponential Curve;
指数曲线预测模型的参数估计与误差分析
Application of Simulated Annealing Algorithm in Exponent Curve Fitting;
模拟退火算法在指数曲线拟合中的应用
Application of RAGA-based exponential curve model in prediction of pile limit bearing capacity
基于RAGA的指数曲线模型预测基桩承载力
Use to indicate an exponential curve. Select the shape on the page to add text.
用于指示指数曲线。在页面上选择形状,以添加文本。
producibility index log
生产率指数测井曲线
Returns an array of values that describes an exponential curve calculated in regression analysis to fit your data
返回一指数回归拟合曲线方程的参数
The index tendency of Shenzhen and Shanghai stock market predicts the curve graph in 2001
2001年深沪两市指数走势预测曲线图
Effect of Seismic Intensity Measure Function to the IDA Curves Dispersion
烈度指标函数对IDA曲线离散性的影响
Settlement curve prediction method-index of deformation process method
沉降曲线预测方法-变形过程指数法
(mathematics) of a function or curve; possessing one or more discontinuities.
(数学)指函数或者曲线;有一个或多个中断的地方。
The application of the risk curve profit exponential method in the real estates risk assessment;
风险曲线盈利性指数法在房地产风险评估应用
Study on Calculating Methods of Centralization Index of Space Lorentz Curve;
空间罗伦兹曲线集中化指数的计算方法研究
APPLICATION OF ROC ANALYSIS ON PREDICTION OF BODY MASS INDEX FOR HYPERTENSION
ROC曲线分析在体质指数预测高血压中的应用
The Realization of Real Time Curves of Risk Index Used in Synthesis Ssfety Evaluation and Decision System on Coal Mine
煤矿监评系统中风险指数实时曲线的实现
Study On The Site Index Guiding Curve Model Of Larch Plantation
落叶松人工林地位指数级导向曲线模型的研究
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