The electrical conductivity of H_2O at 0.21-4.18 GPa and 20 -350℃

The electrical conductivity of H2O in solid and liquid phases has been measured at 0.21-4.18 GPa and 20-350℃. The results indicate: ( i ) different phases of H2O in solid have different relations between electrical conductivity and temperature and pressure. The conductivity changes continuously with temperature, but discontinuously with the pressure between 2.11 and 2.58 GPa, which corresponds to the transforming pressure between ice (Ⅵ) and ice ( Ⅶ ) ; ( ii ) the con-ductivity of H2O in liquid all increases with temperature and pressure, but there are discontinuities at pressures between 0.57 and 0.9 GPa, and between 2.11 and 2.58 GPa, which are also consistent with the polymorph of ice (ice ( Ⅴ), ice (Ⅵ) and ice ( Ⅶ ) ) . This reflects that H2O in liquid at different pressures has quite different properties of electron chemistry. It is prob-ably the important reason that causes the layers with high electrical conductivity and low velocity in the earth's crust and upper mantle.     

STUDY OF THE HEAT AND HUMIDITY TRANSFER PROCESSES BETWEEN AIR AND WATER IN THE AIR WASHER

The processes of heat and humidity transfer between air and water are what to be studied mainly in the paper, we put forward some main factors which influence the processes of heat and humidity transfer in the air washer. We come to the conclusion that we can change these main factors to achieve different heat and humidity transfer processes and decide processes of heat and humidity transfer of air and water with the initial temperature of spraying water in the air washer. All these results can make things convenient for the air conditioning management.     

低温感包覆药已燃质量分数的一种计算方法

该文以大量中止燃烧实验数据为基础，研究并划分了低温感包覆药（ＬＴＳＣＰ）的燃烧过程，给出各阶段其已燃质量分数的计算方法。通过对多种装药的计算表明，该方法具有较 准确的低温感效果的能力，与实验结果符合较好。     

Fibrinogen Structural Changes Caused by Glass Surface Adsorption Detected by Solid Surface Fluorescence Spectroscopy

ＦｉｂｒｉｎｏｇｅｎＳｔｒｕｃｔｕｒａｌＣｈａｎｇｅｓＣａｕｓｅｄｂｙＧｌａｓｓＳｕｒｆａｃｅＡｄｓｏｒｐｔｉｏｎＤｅｔｅｃｔｅｄｂｙＳｏｌｉｄＳｕｒｆａｃｅＦｌｕｏｒｅｓｃｅｎｃｅＳｐｅｃｔｒｏｓｃｏｐｙ＊ＧｏｎｇＹａｎｄａｏ（公衍道），ＤｉｎｇＸ...     

Asymptotic Solution of Steady Dynamic Crack Growth in a Power-law Elastic-plastic Solid

ＡｓｙｍｐｔｏｔｉｃＳｏｌｕｔｉｏｎｏｆＳｔｅａｄｙＤｙｎａｍｉｃＣｒａｃｋＧｒｏｗｔｈｉｎａＰｏｗｅｒ┐ｌａｗＥｌａｓｔｉｃ┐ｐｌａｓｔｉｃＳｏｌｉｄ＊ＺｈｕＸｉａｎｋｕｉ（朱先奎），ＨｗａｎｇＫｅｈｃｈｉｈ（黄克智）ＤｅｐａｒｔｍｅｎｔｏｆＥｎｇ...     

低速绕流半圆柱时的流动和换热分析

用数值方法计算了绕流半圆柱时混合对流换热的流场和温度场，计算范围为Ｇｒ＝３．６６×１０５，Ｒｅ＝４７８～２３９０，同时也计算了纯自然对流和纯对流工况．计算结果表明，由于自然对流的影响，混合对流时的流线较纯对流时会有所抬高，同时半圆柱后面的回流形成的旋涡也更大．因此在小Ｒｅ数并有较强加热的情况下，温度场对流场的影响是不可忽略的．     

固体酸催化醇酸酯化反应新工艺的研究──Ⅰ．酯化催化剂的研究和己酸酯的合成

研究了新型固体酸催化剂ＤＨＲ对己酸与低级脂肪醇直接酯化的催化性能，并考察了催化剂用量对酯化产率的影响．结果表明：ＤＨＲ型固体酸是醇酸直接酯化反应的高效催化剂，酯化产率达９０％以上，催化剂重复使用１５次，未发现其活性明显降低．用该催化剂合成了已酸乙酯、丙酯、丁酯、异丁酯和戊酯五种己酸酯．此法操作简便，反应条件温和，产率高，具有显著的工业应用价值．     

PAN基碳纤维的结构研究及热处理温度的影响

本文利用Ｘ射线衍射方法，讨论了ＰＡＮ基碳纤维的微观结构及微观结构随热处理温度的变化关系，指出ＰＡＮ基碳纤维由乱层石墨和单层碳原子面双相构成，同时进一步给出了结构参数Ｌａ、Ｌｃ、ｄ００２，用微晶择优取向度Ｗ１／２随热处理温度的变化规律。