In order to analyze whether the prediction accuracy is improved after the removal of periodicity , the forecasting is made by ar ( p ) model using original series data . the results indicate that accuracy may not be evidently improved 在剔除周期成分后，用ar ( p )模型建模，并作预测。为了分析周期提取是否影响预测精度，还对原系列之间建立ar ( p )模型作预测，结果表明剔除周期未能提高预测精度。
This article unifies the concrete example in carbonization industry to introduce the assessment methods such as recognition of the environmental risk pollution source , the forecast of influence and the establishment of the slowdown measures and emergency 摘要结合具体实例，对焦化行业环境风险评价中，环境风险污染源的识别、影响预测及环境风险的减缓措施和应急预案的制定等评价方法进行了分析。
This dissertation first summarizes the development of seismic attribute . the theoretical basis of seismic attribute is systematically discussed . then , the paper compares some kinds of analytical method of seismic attribute and analyzes the factors that influence the effect of prediction 本文首先简要回顾了地震属性发展的历史，系统探讨了地震属性的物理基础及相应的一些算法，然后剖析各种分析方法和影响预测效果的因素。
When we have set up a relevant system at cities , we can estimate traffic situation in future without base materials by means of normal four steps model system . at the same time , brings out scientific means for special bicycle traffic in china and gives examples for its process and feasibility . in summary , using tia can reduce the impact of large building on its surrounding and ensure traffic development on balance 通过对相关资料的研究，给出在城市建设项目中进行tia ( trafficimpactanalysis交通影响评价)的工作步骤，确定应进行评价的建筑类型及影响范围，提出适合中国国情、针对大规模城市开发项目的交通影响预测方法和评价标准：当进行交通影响评价的项目所在城市已建立了综合交通规划模型系统时，可利用一般四阶段模型预测项目交通量、背景交通量以及总的交通状态；在缺乏基础数据的条件下，可根据符合我国实际情况的快速预测法进行交通预测：同时针对我国独有的自行车交通，提出科学的评价方法。
