A Dynamic Forecasting System with Applications in Production Logistics

Production logistics involve the co-ordination of ac tivities such as production and materials control (PMC), inventory management, p roduct life cycle management, etc. Those activities demand for an accurate forec asting model. However, the conventional methods of making sell and buy decision based on human forecast or conventional moving average and exponential smoothing methods is no longer be sufficient to meet the future need. Furthermore, the un derlying statistics of the market information change ...     

Potash-rich volcanic rocks and lamprophyres in western Shandong Province: 40Ar39Ar dating and source tracing

Highly precise 40Ar39Ar dating results demonstrate that the ages of potash-rich volcanic rocks in western Shandong Province are 114.7-124.3 Ma, and that of the lamprophyres is 119.6 Ma. The potash-rich volcanic rocks have relatively high (87Sr/86Sr)i ratios ( 0.708715-0.711418)and distinctly negative εNd values ( -11.47 - -17.54), and are enriched in radiogenic lead (206Pb/204pb=17.341-17.622,207pb/204Pb=15.525-15.538, 208Pb/204pb = 37.563-37.684).Similarly, the lamprophyres also have quite low εNd values ( -11.57 - -19.64). Based on the fact that the Sr, Nd and Pb isotopic compositions of potash-rich volcanic rocks are very consistent with that of the clinopyroxene separates, and by integrating comprehensive analyses of their tectonic settings,and extensive comparisons of the Sr, Nd isotopic compositions with that of the related simultaneous rocks, it is concluded that the potash-rich volcanic rocks and lamprophyres in western Shandong Province were most possibly derived from the partial melting of enriched mantle which was caused by source contamination and metasomatism of subducted continental crustal materials.``     

用于消除区域间电力系统内振荡的最优鲁棒模型匹配控制器的设计

在大型电力系统中存在有自生的甚低频系统振荡。它一旦产生,就会不断增强,从而导致发电机组丧失同步以致使系统解体。本文推出一种新颖的最优控制对策,用以消除低频振荡,而又不损伤鲁棒数值特性。数字模拟结果表明,所推出的控制器可作为消除低频振荡的有效手段。     

热释放速率的不确定性对可用安全疏散时间的影响

基于室内火灾烟气层高度和温度模型,使用拉丁超立方抽样方法研究了火灾增长系数和最大热释放速率的不确定性对可用安全疏散时间(ASET)的影响.结果表明,对于相当于民用建筑一个防火分区的单室无排烟房间,当最大热释放速率在0～1MW时,其不确定性对ASET影响较大;当最大热释放速率为1～4MW时,火灾增长系数对ASET的影响大于最大热释放速率对ASET的影响;当最大热释放速率在4～8MW取值,仅考虑最大热释放速率的不确定性时,ASET为一确定值,此时热释放速率的不确定性对ASET的影响仅由火灾增长系数产生.     

Fiber Migration and Distribution of Twist at Different Radial Positions of Rotor Yarn-by Hi-Scope Video Microscope System

BａｃｋｇｒｏｕｎｄＩｎｔｈｅｅａｒｌｙ 195 0ｓ,ＭｏｒｔｏｎａｎｄＹｅｎ[1] ｄｅｖｅｌｏｐｅｄｔｈｅｆｉｂｅｒｔｒａｃｉｎｇｍｅｔｈｏｄｉｎｔｈｅｙａｒｎ .Ｔｈｅｙｍｉｘｅｄｓｏｍｅｄｙｅｄｆｉｂｅｒｓｉｎｔｏｙａｒｎｂｅｆｏｒｅｃａｒｄｉｎｇ ,ａｎｄｄｉｐｐｅｄｔｈｅｙａｒｎｉｎａｃｈｅｍｉｃａｌｒｅａｇｅｎｔｗｉｔｈｓｉｍｉｌａｒｒｅｆｒａｃｔｉｖｅｉｎｄｅｘｔｏｏｂｓｅｒｖｅｔｈｅｄｙｅｄｆｉｂｅｒｓｉｎｔｈｅｙａｒｎｕｎｄｅｒｔｈｅｍｉｃｒｏｓｃｏｐｅ .Ｔｈｅｃｏｎｃｅｐｔｏｆｆｉｂｅ…     

含缺陷流变物体热致磁感应强度随动跟踪测量系统的研制

含缺陷流变特体在破坏过程中存在热致磁效应，跟踪测量出这一热致磁感应强度，对含缺陷流变物体材料破坏机理的研究具有重要意义，介绍一种以单片机为核心的随动跟踪测量系统的研制及其应用，重点说明传感器的结构及跟踪测量方法，并给出主程序框图。     

A combinatorial approach of developing alloy thin films using co-sputtering technique for displays

In this study we have used a combinatorial approach for producing binary and ternary alloy thin film libraries using a lab-scale RF co-sputtering system.Initially we used two elemental sputtering targets,i.e.aluminum(Al) target and neodymium(Nd) target,to produce a film library of varying composition and successfully identified a suitable composition range(1.95-2.38 at%Nd) in which resistance to hillock formation and resistivity of the film spots were found to be satisfactory in annealed state(350°C,30 min) .In another case,in order to form ternary alloy composition library we have used two sputtering targets,i.e.an Al-0.5 at%Nd alloy target and an elemental Ni target.Though,co-sputtered Al-0.6 at% Nd-0.9 at%Ni alloy films showed satisfactory resistance to hillock formation and low resistivity after annealing,film deposited from a ternary alloy target with the same composition failed to show satisfactory resistance to hillock formation during annealing.In case of Al-0.6 at%Nd-0.9 at%Ni alloy target,250 nm thick film showed poor resistance to hillock formation than the 500 nm thick film.This clearly showed thickness-dependent hillock performance of Al-0.6 at%Nd-0.9 at%Ni alloy.In this study it was found that,in addition to the process variables,metallurgical microstructure of the alloy sputtering targets had significant effect on the film properties which was not obvious from the results of films deposited using co-sputtering of the individual elemental targets.     

芦荟冷冻粉中多糖和甙和纯化、分离和鉴定

以费拉芦荟生产的 10 0∶1全叶芦荟冷冻干燥粉为材料 ,用高速逆流色谱和制备色谱从中分离出 3种芦荟多糖和 1种芦荟甙 ,并用色谱、光谱定性 .多糖纯度达到定量和鉴别用芦荟多糖对照品的要求 ,芦荟甙的纯度达w =97.93% .     

荔波小七孔岩溶植被的研究

本文通过实地调查、样方统计、标本采集等,对荔波小七孔地区岩溶植被的生境条件、区系组成、群落学特征、发展演替以及保护利用等方面进行了初步的分析研究。     

细水雾抑制沥青喷雾火的实验研究

通过实验研究了沥青喷雾燃烧特性以及细水雾抑制沥青喷雾火的有效性.细水雾雾场特性由LDV/APV系统测量.实验中的温度数据由热电偶测量,沥青喷雾火自由燃烧时火焰结构则由热像仪获取.实验结果显示,喷雾火燃烧时最高温度发生在火焰团内部.当压力比比较高时(pw/Pf＞2.65),细水雾对沥青喷雾火有较好的抑制熄灭作用;而当压力...