Ant System Based Optimization Algorithm and Its Applications in Identical Parallel Machine Scheduling

1 .ＩＮＴＲＯＤＵＣＴＩＯＮＩｄｅｎｔｉｃａｌｐａｒａｌｌｅｌｍａｃｈｉｎｅｓｃｈｅｄｕｌｉｎｇｐｒｏｂｌｅｍｆｏｒｍｉｎｉｍｉｚｉｎｇｔｈｅｍａｋｅｓｐａｎｈａｓｂｅｅｎｐｒｏｖｅｄｔｏｂｅａｎＮＰｐｒｏｂ ｌｅｍ[1,2 ] .Ｉｔｗａｓｔｒａｄｉｔｉｏｎａｌｌｙｓｏｌｖｅｄｂｙｏｐｅｒａｔｉｏｎａｌｍｅｔｈｏｄｓｓｕｃｈａｓｄｙｎａｍｉｃｐｒｏｇｒａｍｍｉｎｇ ,ｂｒａｎｃｈａｎｄｂｏｕｎｄｍｅｔｈｏｄ ,ａｎｄｉｎｔｅｇｅｒｐｒｏｇｒａｍｍｉｎｇ[3～ 7] .Ｔｈｅｓｅｍｅｔｈｏｄｓｃａｎ ｇｉｖｅａｎｏｐ…     

Graft Modification of N,N''''-methylene- bisacrylamide onto Silk in the Presence of Air

The graft modification of N, N'-methylene-bisacrylamide (NNMBAA) onto silk using eerie ammonium sulfate, potassium persulfate, ammonium persulfate and 2, 2-azobis (isobutyronitrile) as the initiators has been studied in the presence of air. To establish reaction conditions for the graft modification of NNMBAA onto silk, the effect of different variables such as the initiator concentration, monomer concentration, acetic acid concentration, time of polymerization, reaction temperature and liquor ratio (fabric: liq.) have been studied. The optimum grafting conditions were found. As evidence of grafting, analyses of amino acid composition and alkali solubility have been carried out. Grafting caused changes in amino acid composition and alkali solubility of silk. The observation has been explained in relation to structural changes in the grafted silk.     

Structures and Properties of Composite Yarns of Filaments and Wool Staple Fibers

More and more composite yarns of filament and wool staple fiber have been applied to develop the new type of fabrics. However, the great difference in yarn structures between the composite yarns and conventional staple yarns does affect the properties of yarns and fabrics. In this paper, it has been studied that the differences of the composite yarn properties of tensile, bending rigidity, torsional rigidity, the hairiness and irregularity etc.     

High Oil-absorptive Composites Prepared from Non-woven Fiber and Sponges with 4-tert- butylstyrene-EPDM-divinylbenzene Graft Polymer

4-tert-butylstyrene-EPDM-divinylbenzene graft terpolym-er (PBED) was prepared by graft cross-polymerization in toluene using BPO as an initiator. The gel-PBED and sol-PBED were isolated from extraction of tetrahydrofuran (THF), and then they were identified by IR spectr-oscopy. The maximum oil-absorptivity of gel-PBED produced from the optimum reaction conditions was 8420% but its swelling rate was very low. The highest oil-absorptivity of photocrosslinked sol-PBED film was 5 800%. Although its oil absorbency was not as high as gel-PBED' s, swelling rate was higher than that of gel-PBED and was suitable for commercial purpose. After swelling in oil, neither gel-PBED nor photocrosslinked sol-PBED film having high oil-absorptivity had sufficient mechanical strength to be taken out of oil wholly. As is known, composite technique is one of the useful methods for reinforcing them. Fibers, sponges and non-woven cloths were used as reinforcers or supporters in this work. Oil-absorptivities and swelling kinetics     

Effects of the Water in Mixed Solvent on the Epoxidation Reaction of Propylene with TS-1 Catalyst

The epoxidation reaction of propylene and hydrogen peroxide with zeolite catalyst containing titanium-silicalite (TS-1)has been studied, and the reaction in the mixed solvent of water/methanol has been discussed. It is shown that the selective of epoxidation propylene decreases while the selective of propylene glycol increases, when the water content increases in the mixed solvent of me thanol/water.     

特殊高等教育医学理论课盲生教学方法探讨

盲生的生理特点主要是视觉障碍，听觉，触觉灵敏，缺少形象思维。在理论教学中的采取特殊的教学方法，充分调动盲生其他生理功能的特敏性，挖掘其内在潜能，使其达到与普通高等医学院校学生相同的水平。     

高效液相色谱法测定血浆中小蘖硷浓度(英)

研究了心衰病人口服小蘖硷后的吸收性，血浆样品用甲醇预处理以沉淀其蛋白质，小蘖硷测定条件为：μBondapakC18柱（10μm，300×3．9mmi．d．）乙腈和0．02mol／L磷酸混合液（45：55．v／v）为流动相，紫外鉴定器设定在波长为346nm处，进样量为50μl时，最小检测极限为8ng／ml。小蘖硷平均回收率为92．5％，结果表明本试验建立的方法和血浆中黄连素浓度监测有利于指导治疗心衰。     

关于Frankl问题和Tricomi问题唯一性定理的注记

本文讨论一类二阶混合型方程的Frankl问题和Tricomi问题的唯一性问题。     

Knitting and Finishing of Ramie Knitted Fabrics Blended with Fine Polyester

Ramie fibre is harsh and rigid. Ramie yarns have a hairy feel and reduced cohesion. A considerable amount of research has been done to ease the undesirable properties of ramie products through modifying conditions of knitting and finishing according to the special properties of the ramie yarn. From the comparison results, burning the hairiness is shown as one of the effective methods to bnprove the properties of the yarn. A typical finishing condition with enzyme treatment is also recommended.     

论高校体育课程教学改革

要将体育课程教学模式和内容达到多样化、实用化； 充实理论教学； 开展选项教学； 注重学生的能力培养