利用低灰低硫无烟粉煤提高冶金燃料质量

目前我国无烟粉煤主要作为民用、高炉喷吹和烧结用燃料,少量用于生产成型燃料、活性炭和过滤炭。随着采煤机械化的发展,无烟粉煤的产量将日益增加。有些地区(如山西晋城)无烟粉煤已造成积压,因此开辟无烟粉煤新的利用途径是必要的。本文就如何在冶金燃料中利用我国低灰低硫无烟粉煤资源问题提出一些看法,供焦化工作者的参考。     

具有正交化存储模式的双层神经网络模型研究

提出了一个具有正交化存储、双层、循环工作的神经网络模型,该模型具有异联想-自联想能力。用蒙特卡洛模拟研究表明,此模型的最大存储模式数M等于每层的神经元数N,而且具有较强的寻址能力。     

THREE-DIMENSIONALNONLINEAR NUMERICAL MODEL WITH INCLINED PRESSURE FOR SALTWATER INTRUSION AT THE YANGTZERIVER ESTUARY

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＩｎｅｓｔｕａｒｉｎｅａｒｅａｓ,ｂｅｓｉｄｅｓｔｈｅｃｏｍｐｌｉｃａｔｅｄｔｏｐｏｇｒａｐｈｙ ,ｔｈｅｃｏｅｘｉｓｔｅｎｃｅｏｆｗａｖｅｓ ,ｃｕｒ ｒｅｎｔｓ,ｔｉｄｅｓ ,ｓｅｄｉｍｅｎｔｓ ,ｓａｌｔｗａｔｅｒａｎｄｔｈｅｉｒｍｕｔｕａｌｉｎｔｅｒａｃｔｉｏｎｓｈａｖｅｒｅｓｕｌｔｅｄｉｎｖｅｒｙｃｏｍ ｐｌｅｘｄｙｎａｍｉｃｐｒｏｃｅｓｓｅｓ .ＴｈｅＹａｎｇｔｚｅＲｉｖｅｒＥｓｔｕａｒｙｉｓａｍｅｄｉｕｍｔｉｄａｌｒａｎｇｅｒｉｖｅｒｍｏｕｔｈｗｉｔｈｓｔｒｏｎｇｒ…     

Oxidation of Silicon and Boron in Boron Containing Molten Iron

 A new process of directly smelting boron steel from boron containing pig iron has been established. The starting material boron containing pig iron was obtained from ludwigite ore, which is very abundant in the eastern area of Liaoning Province of China. The experiment was performed in a medium frequency induction furnace, and Fe2O3 powder was used as the oxidizing agent. The effects of temperature, addition of Fe2O3, basicity, stirring, and composition of melt on the oxidation of silicon and boron were investigated respectively. The results showed that silicon and boron were oxidized simultaneously and their oxidation ratio exceeded 90% at 1 400 ℃. The favorable oxidation temperature of silicon was about 1 300-1 350 ℃. High oxygen potential of slag and strong stirring enhanced the oxidation of silicon and boron.     

Theoretical Calculation on Optimum Si—doping Content in Boron Carbide Thin Film

The theoretical expression of the relationship between optimum doping content and crystal structure is presented as well as the preparation methods.By using this expression,the optimum doping content of silicon-doped boron carbied thin film is calculated.The quantative calculation value is consistent with the experimental results. This theoretical expression is laso appropriate to resolve the optimum doping content for other electric materials.     

E-Commerce-Objected E-Stamp Systems

1　ＩｎｔｒｏｄｕｃｔｉｏｎＷｉｔｈｔｈｅｇｌｏｂａｌｉｚａｔｉｏｎｏｆｉｎｆｏｒｍａｔｉｏｎａｎｄｅｃｏｎ ｏｍｙｏｖｅｒｌｏｗ ｃｏｓｔＩｎｔｅｒｎｅｔ,ｍｏｒｅａｎｄｍｏｒｅｐｅｏｐｌｅｇｒｅａｔｌｙｄｅｐｅｎｄｏｎｉｎｆｏｒｍａｔｉｏｎｎｅｔｗｏｒｋｓ,ｏｆｗｈｉｃｈｅ ｃｏｍｍｅｒｃｅｉｓａｎｏｂｖｉｏｕｓｅｘａｍｐｌｅ[1～ 2 ] .Ｂｕｔｕｐｔｏｎｏｗ ,ｎｅｗｓａｔｈｏｍｅａｎｄａｂｒｏａｄｓｔｒｏｎｇｌｙｉｎｄｉｃａｔｅｓａｆａｃｔｔｈａｔｌｏｇｉｓｔｉｃｓｈａｓｂｅｅｎａｂｏｔｔｌｅｎｅｃ…