随机游走

基于图上随机游走过程的SAR图像图谱分割方法

Spectral segmentation of SAR image based on random walk on graph

常见的风险度量指标包括基于随机游走的方差、β指标以及基于收益长期相关性特征的赫斯特指数、λ参数、C指标等。

Variance and β based on random walk and Hurst Index , index C and parameter X based on returns ' long-term correlation are common risk measurement indexes in full domain risk theory .

有效市场假设（EMH）和随机游走假设是现代资本市场理论的基础。

Efficient Market Hypotheses and Random Walk Hypotheses are bases of modern capital market theory .

基于随机游走实现的快速NLM图像、视频去噪

Fast Image and Video De-noising via Non-Local Means Based on Random Walk

为探索中国经济波动的性质及影响因素，运用数理统计和回归分析方法对中国经济数据进行了单位根检验，揭示了中国经济增长加速度（GDP的二阶差分）具备随机游走性质；

Based on the work of unit root test of China 's GDP , the acceleration of China 's economic growth which is the second difference of GDP , is regarded as a random walk model .

与基于自回归（AR）模型的Kalman滤波结果进行比较，实验结果表明：基于ARIMA模型的Kalman滤波比基于AR模型的Kalman滤波更能减小光纤陀螺的零偏不稳定性和角度随机游走。

In addition , an AR model is discussed and compared with the ARIMA model . Experimental result shows that ARIMA model based Kalman filter is efficient in reducing the bias instability and angle random walk .

资本市场有效性假说的实证分析主要有随机游走检验、相关性检验和ARCH类模型检验，而ARCH类模型较好地揭示高频金融时间序列的条件方差时变性、波动集束和宽尾分布现象。

Empirical analysis of hypothesis of market efficiency always is tested by random walk , coefficiency and ARCH class models . ARCH class models can expose conditional time varying variance , clustering and fat tail of distribution of high frequency financial time series .

其次采用自相关系数、Q统计量和构造自回归移动平均过程三种方法对上证综合指数进行随机游走检验，得出上海股票市场还未达到弱式有效性的结论。

After that , three methods : correlation coefficient , Q statistic weight and autoregressive moving average process , were used to have the random inspection on Shanghai Index . The conclusion is Shanghai security market is still not the weak-from efficiency .

为验证国际干散货航运市场的弱有效性，对波罗的海运价指数（BDI）进行了波动性分析和随机游走检验。

In order to verify the weak efficiency properties of international dry bulk shipping market , volatility of the BDI was analyzed and the random walk hypothesis was tested .

通过方差比检验法对国际干散货航运市场的收益率序列进行了检验，结果显示BDI的对数序列的随机游走假设被拒绝，国际干散货航运市场不是一个有效的市场。

Through variance ratio test , the result shows , that the random walk hypothesis of BDI logarithm series can be rejected and international dry bulk shipping market is inefficient .

本文主要创新点如下：提出一种基于随机游走模型的查询意图识别算法RWM。

This paper proposes a novel methodology to the problem of query intent classification based on random walk model , which is called RWM .

应计利润模型主要包括随机游走预期模型、行业模型、平均数回复模型、琼斯及其扩展模型、K-S模型、边际模型和营运资金模型等。

These measures include random walk model , industry model , mean-reverting model , Jones and modified-Jones models , K-S model , margin model and so on .

无铅汽油期货的日收益率序列不满足随机游走过程，这表明它有一个“长期记忆”在起作用，作用周期为10d，并且这种“长期记忆”作用是间歇性的无限拓展的。

On Infinitely Singular Operators It indicates that there is a force called " long-term memory ", of which period is about 10 days , and the force is intermittent to expand infinitely .

Fama（1970）提出了有效市场理论，他认为股票市场的股价服从随机游走过程，无法找到股票市场股价运行规律。

Fama ( 1970 ) proposed the EMH , which suggests that the stock price is random walk . Therefore , it is impossible to find the rules of volatility for stock price .

EMH是建立在理性投资者、有效市场及随机游走过程这三个核心前提假定基础上的。

Many classical capital market theories are developed on the basis of EMH or on some bases closely related with it . EMH is established on the following three presuppositions : rational investor , efficient market and random walk process .

首先提出了在角度随机游走为主要误差源的情况下，RLG的离散输出模型。在假设累积角度量化误差为白噪声的前提下推导了方差（或Allan方差）分析中的量化误差模型。

The discrete output model of the RLG is put forward when random walk is the main error source , and the quantization error model in the variance ( or Allan variance ) method is deduced on the hypothesis that the quantization error can be treated as white noise .

基于结构张量与随机游走的图像分割算法

An Image Segmentation Algorithm Based on Structure Tensor and Random Walk

我国股市收益率非线性下的随机游走检验

Testing the Random Walk Hypothesis under Nonlinear Process for China Stock Returns

非均质土柱中溶质迁移的连续时间随机游走模拟

Modeling solute transport in heterogeneous soil column using continuous time random walk

将两种基于图论的算法图切割与随机游走应用于运动对象的分割。

Segmentation of motion objects based on graph cuts and C-V model ;

基于先验知识随机游走模型的视网膜血管分割方法

Segmentation of Retinal Blood Vessels Based on Prior Knowledge Random Walks Model

中国股票A股市场随机游走模型的检验

Testing random walk model on Chinese stock market a

反馈式随机游走模型及其在股票投资中应用

Feedback random walk model and its application to system analysis of stock investment

股票市场非线性随机游走检验

Testing of the Non-linearity Random Walk in Stock Market

光纤陀螺随机游走系数模型的修正和实验研究

Correction for Model of Random Walk Coefficient of FOG and Experimental Comparison Study

基于图上随机游走模型的查询日志中命名实体挖掘。

Mining named entities in query log based on random walk on graph .

该方法克服了半自动随机游走算法的应用局限性。

This method overcame the practical limitation of the original semi-automatic RW algorithm .

基于随机游走和输入估计方法的振动主动控制研究

An active vibration control method based on random walk and input estimation algorithm

随机游走、市场效率与投资策略

Random Walk , Market Efficiency and Investment Strategy

提出了一个二维随机游走模型和一个一维随机游走模型用于分析多载波信号的统计特性。

A two-dimensional random walking model and a one-dimensional random walking model are proposed .