TSINGHUA SCIENCE AND TECHNOLOGY
                  1999, Vol.4, No.2

CONTENTS
Information Science and Technology

Concurrent Engineering Research and Application XIONG Guangleng, LI Bohu,CHEN Jiadong, et al 1375-1385
Product Development Process Modeling ZHANG Keshu, CHEN Jiadong,XIONG Guangleng 1386-1391
Consistent Algorithm for Multi-value Constraint with Continuous Variables CHANG Tianqing, LI Jingyi,XU Wensheng, et al 1392-1396
Case-based Reasoning in Conflict Negotiation in Concurrent Engineering XU Wensheng, XIONG Guangleng, GAO Feng, et al 1397-1402
Feature Analysis of STEP Application Protocol and its Application LI Bing, MENG Mingchen,LI Zhenhong, et al 1403-1406
Multimedia Conferencing System and Multicasting ZHANG Hailin, ZHAO Jinrong,ZHUANG Yongzhou 1407-1411
Concurrent Engineering Oriented CAx/DFx Information Integration ZHANG Heming, XIONG Guangleng,
ZHANG Yuyun 1412-1417
DFM/CAPP/CAM System in a Concurrent Engineering Environment LIU Chengying, WANG Xiankui,  PU Jian, et al 1418-1423
CAPP Framework System for Concurrent Engineering LI Zhizhong, WANG Xiankui,LIU Chengying 1424-1430
Numerical Simulation System for Casting Process in Concurrent Engineering LI Yongbao, LIU Baicheng,QIU Wei 1431-1435
Assembly Sequence Planning for Mechanical Products JIANG Hua, ZHANG Yuyun, XIONG Guangleng, et al 1436-1439
Part Machinability Evaluation System HUANG Xin'gang, WANG Xiankui,LIU Chengying, et al 1440-1442
Automatic Fixture Planning TANG Dong, CHENG Ye,CAI Fuzhi, et al 1443-1447
Study and Application of Cooperative Work Environment DU Cheng, WANG Jin,SHI Zhu1 448-1450

Chemistry and Chemical Engineering

Relative Molecular Mass Distribution of BG Resins GAO Yanfang, XU Yueping,LIU Deshan, et al 1451-1453
Affinity Capillary Electrophoresis:Study of the Binding of HIV-1 gp41 with a Membrane Protein (P45)   on the Human B Cell Line,Raji WANG Qinggang, LUO Guoan,WU Weicheng, et al 1454-1457
Electronic States of Some Semiconductor Clusters TAN Hang, FENG Pingyi,LIAO Muzhen 1458-1461
Determination and Prediction of Binary Solubility for Aromatic-Tetraethylene Glycol (with Water) Systems ZHU Shenlin, WANG Wen,GOU Zeming 1462-1465
Filtration Process of the Spiramycin Fermentation Broth QI Pingyan, FENG Wenzheng, MIAO Yong, et al 1466-1471
Overexpressions of Lambda Phage Lysis Genes and Biosynthetic Genes of Poly-β-hydroxybutyrate in Recombinant E.coli YIN Jin, XU Yi, LI Hongqi, et al 1472-1476
Extractive Distillation with Salt in Solvent ZHOU Rongqi, DUAN Zhanting 1477-1479
Synthesis of Ultrafine AlN Powders in an Al-O-C-N System DAI Xiaming, LI Qingfeng, DING Mingqin, et al 1480-1484

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