林分生长与产量模型系统研究综述

本文阐述了影响林分生长和产量的 5个因子 ,即立地指数、林分年龄、林分密度、生境类型和林分结构。介绍了林分水平、径级水平和单株木水平的林分生长和产量预测模型系统的一些代表性模型系统。还介绍了一些典型的生长和死亡模型。林木和林分是两级不同水平的生态系统。作者提出了建立以生态系统特性 (如系统的整体性、同时性、组成成分间交叉相关性等 )为基础的系统化模型。通过建立联立方程系统 ,用 3阶段最小二乘法拟合回归参数 ,可望提高林分生长和产量预测模型的真实性和估测精度     

锌盐和铜盐在皮蛋加工中的应用及对产品品质的影响

探讨了以锌盐和铜盐为主的不同锌铜比加工皮蛋的方法。分析了锌盐和铜盐在加工皮蛋时的用量及对产品质量的影响。结果表明,锌盐(ZnSO4·7H2O)用量为0.3%时,铜盐(CuSO4·5H2O)的用量达到锌盐用量的0.05%,所加工的产品具有良好的商品品质。     

河北板栗、金丝小枣和红小豆品质气候与品质预报

对板栗、金丝小枣和红小豆的主要成分进行了分析鉴定,确定了它们的品质等级分类标准。通过诸多气象因子的分析筛选,建立了相关气象因子预报品质的数学模式和计算机(图形输出)模式。     

Grey Prediction Method in Gas Emissing Quantity

Bastd on dealing with the initial data of the gas emissing quantity of mining coal face by natural logarithm,the improved grey model(1,1) is built.The improved Grey Markov prediction mode is built through uniting the improved grey model(1,1) and the Markov mode.Comparing the fitting precision of the improved grey model(1,1),the Grey Markov prediction mode and the improved Grey Markov prediction mode respectively through actual survey data in scene,it shows that the precision of the improved Grey Markov prediction mode is the best of the three and its result is correct and reliable,having certain general applicability.     

A RELIABILITY PROCESSING ALGORITHM SUITABLE FOR STOCHASTIC AND SUDDENLY VARYING DATA

In regard to stochastic and suddenly varying data,a new kind of data processor algorithm based on adaptive prediction is presented.The algorithm describes the changing pattern of measured variables by means of time series models with slowly time-varying parameters,forms the criterion by use of the adaptive and its 95% belief limit,and processes the measured data so as to reject or restrain outliers mixed in them.The simulation example indicates that the algorithm surmounts difficulties which most current algorithms encounter when processing stochastic and suddenly varying data and that it is of obvious effects.     

Research of Failure Model and Life Prediction On Heater Tubes

An experimental research on the Alkylbenzene heater tubes material which has been operated for about 100 thousand hours is carried out. In addition, the corrosion product of heater tube has been examined by using an electronic probe and probe into the corrosion Mechanism of heater tubes. Based on the fault tree analysis on the heater tubes by using the FTA technology, the paper finds the main factors affecting the failure of the heater tubes, discusses the failure model of the heater tubes, put forward the mathematical mode of life prediction and failure model of the heater tubes.     

Coal Consumption Prediction in Chongqing Municipality on the Basis of Gray System Theory

On the basis of the theory of gray system, two models have been presented to forecast the coal consumed during 2005 -2011. The comparison between coal consumption over 1995 -2002 and the prediction show that the models enjoy a high precision and are practical,and the forecast results are reliable.     

Local Nonlinear Forecasting of Short-term Power Load Forecasting

The nearest points in phase space are determined by Euclid distance in chaotic local prediction. The prediction accuracy depends on quality of the nearest points. But the shortest distance does not imply better forecasting effect. While false nearest neighboring point or high embedding dimensions appear evolvement track of some nearest neighboring point should be apart from prediction point. Because it is difficult for Euclid distance to reflect the correlation degree between the nearest points and prediction point. So the idea of combining Euclid distance with correlation degree is put forward. The method is applied to short-term electrical load forecasting. The result of load series forecasting by the presented method is more effective to improve prediction accuracy.     

Some Key Technologies and System Development of Distribution Management on Time Limited Consumable

According to the characteristic of Time Limited Consumable and feature of line in Time Limited Consumable, some key technologies of if one studied, including early warning rule of product guarantee period, real time control strategy of available sale quantity when considering products being overdue, distribution pattern integration in Time Limited Consumable, and business process reengineering. On the basis of the above study, distribution management system oriented time limited consumable is constructed and implemented for validation with good effect.