probability forecast
3.With the thought of econometrics, models of three-points, removing probability of Markov, and Holt-Winter are applied to forecast of tomorrow spot price.
4.Using normal probability model is more simple and efficient to determine performance and characteristic parameter of waterflood oilfield, so it is feasible and practicable to forecast water cut and oil recovery of waterfood oilfield and evaluate its development measures.
5.The results compared with Monte Carlo simulation display that the analytical solution can well forecast the probability distribution of the steady-state responses of the previous systems for smaller coulomb damping.
6.The appraisal takes the ecology material, the environment material, chemistry material, the toxicology material as the foundation, through the project analysis, the source strong analysis sets a target the pollutant, distinguishes its hazardous nature, the probability, the degree, the scope which the computation risk occurs and so on, the choice appraisal end point, the use appraisal model forecast goal pollutant exposed density, the analysis risk source to the acceptor the harm degree, carries on the risk attribute.
7.According to the historical data of drought change in Zhejiang Province,and by means of the R/S analysis and forecast model of Markov chain,Hurst exponent and vector of condition probability are calculated,and change tendency of future drought in Zhejiang is analyzed.
8.Based on the abundant field data and the comprehensive analysis,the authors discusses the distribution, present status and hazard of surface collapse in Pingdingshan mining area, defines the suitable rock movement parameters through lots of rock movement observation data, forecast the surface collapse, that caused by exploiting coal, by adopting probability integral method.
9.So it is of great important economic and realistic significance for studying on quantitative risk assessment of major accidents for industrial storage tanks, presenting risk forecast of analysis objectives in advance, realizing risk characteristics, evaluating probability of catastrophic accidents of systems in addition to analyze corresponding accident consequence, estimating risk whether is acceptable or not and providing theoretical bases for accepting, controlling and eliminating the risk.
10.Abstract: The paper presents four basic principles for forecasting rainfall debris flow,i.e.,the principles for phenomenon pedictability,genetic classification,discriminant factor simplification and forecast decision respectively.And the forecast models are classified.Based on superposition of periods of activity and precipitaton,the long-term trend predicting model is set up;Based on combination of frequenies of yearly activity and precipitation gradation,the state predicting model of frequency is set up;Relation between the monthly or ten-day precipitation and the threshold of occurrence is determined,the medium-term forecast model of frequency of each month or each ten-dan in a year is put foward;Based on the short-term weather information,the short-term danger discriminant rule,the method of zoning danger area,the model of assessing gullies,and the probability model of calculating danger strength(occarrence gullies)are introduced.The models mentioned are of applicability,generality,and operability.
文摘:论述了暴雨泥石流预报的4个基本原理,即现象可预报性原理、成因分类组合原理、判别因素简化原理和预报决策依据原理.对泥石流时间预报模型作了分类,提出了通过泥石流活动周期与降水量周期叠加,建立泥石流活动性的长期趋势预测模型;通过泥石流活动年数频次与降水量丰欠等级频次组合,建立泥石流活动年份频次的态势预测模型;根据月或旬雨量确定泥石流发生的阈值关系,建立年内月或旬泥石流发生频次的中期预报模型;由短期天气预报,建立泥石流发生可能的短期险时判别规则、险区圈定方法和险量（泥石流沟数）评估模型,以及泥石流险情强度（大面积发生，多沟发生，单沟发生或无发生）的概率计算模型,上述泥石流预报模式的应用具有普适性和可操作性.收藏指正
