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Generalized Self-Adaptive Genetic Algorithms

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International Journal of Minerals,Metallurgy and Materials 2000年第1期14卷 72-75页

作者： Bin Wu Xuyan Tu Jian Wu Information Engineering School, University of Science and Technology Beijing, Beijing 100083, China Department of Information and Control Engineering, Southwest Institute of Technology, mianyang 621002, China Information Engineering School University of Science and Technology Beijing Beijing 100083 China Department of Information and Control Engineering Southwest Institute of Technology Mianyang 621002 China

In order to solve the problem between searching performance and convergence of genetic algorithms, a fast genetic algorithm generalized self-adaptive genetic algorithm (GSAGA) is presented. (1) Evenly distributed initial population is generated. (2) Superior individuals are not broken because of crossover and mutation operation for they are sent to subgeneration directly. (3) High quality im- migrants are introduced according to the condition of the population schema. (4) Crossover and mutation are operated on self-adaptation. Therefore, GSAGA solves the coordination problem between convergence and searching performance. In GSAGA, the searching per- formance and global convergence are greatly improved compared with many existing genetic algorithms. Through simulation, the val- idity of this modified genetic algorithm is proved.

关键词： generalized self-adaptive genetic algorithm initial population immigration fitness function

Investigation on the surface active sites variation of mineral dusts

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Journal of Central South University 2001年第3期13卷 169-174页

作者： DONG Fa-qin, WAN Pu, FENG Qi-ming, SONG Gong-bao, PENG Tong-jiang (Institute of Mineral Materials and Applications, Southwest University of Science and Technology, mianyang 621002, China) 1. Institute of Mineral Materials and Applications Southwest University of Science and Technology 621002 Mianyang China

The paper analyzed the groups naked and the transformed of fibrous brucite, wollastonite, chrysotile asbestos, sepiolite, palygorskite, clinoptilolite, crocidolite and diatomaceous earth mineral dusts by using IR under acid and alkali etched, strong mechanical and polarized molecular interaction. The results show that the active site focuses on ends in stick dusts and on defects or hole edges in pipe dusts. The inside active sites of dusts play the main role in small molecular substance. The shape of dusts affects their distributions and densities of active sites. The strong mechanical and weak chemical force make the active site feature of minerals change, the powder process brings about more naked surface groups and more combined types. The dust activity relates to the type, contribution, and naked level of surface groups. The studied dust surface groups are mainly as follows: OH?, Mg(OH)?, Si-O-Si, Ca-O-Si, -Mg-OH2,-Al(Si)-OH, -Mg(Ca)-OH2, Ca-O,-Si???OH, Mg(Fe)-OH. Due to the difference of surface composition and structure, the minerals have a large disparity on activity and character of surface groups. The one side surface group of chrysotile layer is the same as fibrous brucite and stripped layer with more naked group. The fibrous sepiolite and palygorskite surface OH? similar to crocidolite is naked with their surface structural defects and cleavage. The more development of mineral defects, the higher of OH? (H2O+) content, the main H2O+ of clinoptilolite is partly transformed into H+, NH 4 + or OH?. The acid etched process may change OH? concentration, distribution and increase the defects and porosity of mineral fiber surface. The alkali etched has no effect on Si-O, Si-OH etc. and destroyed Al-O, Al-OH? acid site of sepiolite, palygorskite and clinoptilolite. Some surface groups of remnant differ from original dusts. The surface process of small polarized molecular or middle moleular’s branch may produce ionation and new coordinate bond, and change the acti

关键词： mineral dusts surface group active site

Study on the cementitiousness of asbestos tailings

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Journal of Environmental Sciences 1998年第1期10卷 100-104页

作者： Lu Zhong yuan, Huo Ji chuan, Liao Qi long, Xiong Yi mou Southwest Institute of Technology, mianyang\ 621002, Sichuan of China

The cementitiousness of dehydration asbestos tailings(serpentine, 3MgO.2SiO 2.2H 2O) in different conditions was studied. The result shown that dehydration asbestos tailings have better cementitiousness in certain condition and it can be used in building materials industry. It was also found that MgO powder, fly ash or quick lime can improve regularly the cementitiousness of asbestos tailings.

关键词： asbestos tailings (serpentine) cementitiousness.

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荷叶花茶保健饮料

食品科技 2003年第5期28卷 67-71页

作者：彭凌西南科技大学生命科学与工程学院绵阳621002

以荷花、荷叶和绿茶浸出液为主要原料,研究了荷叶花及绿茶制作饮料的加工工艺条件和关键环节,通过试验设计确定了产品的配方和最佳工艺参数。

关键词：荷花荷叶绿茶保健饮料加工工艺

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钢管超高强混凝土的强度及本构关系预测

四川大学学报（工程科学版） 2003年第4期35卷 10-13页

作者：谭克锋西南科技大学材料学院四川绵阳621002

为安全有效的应用超高强混凝土,通过加载测荷载—应变关系的方法,对钢管超高强混凝土的力学性能进行了研究。研究结果证明,超高强混凝土经钢管约束后,塑性得到很大的改善,改善的幅度随套箍指标Φ的增加而增加,为彻底改善超高强混凝土的... 详细信息

为安全有效的应用超高强混凝土,通过加载测荷载—应变关系的方法,对钢管超高强混凝土的力学性能进行了研究。研究结果证明,超高强混凝土经钢管约束后,塑性得到很大的改善,改善的幅度随套箍指标Φ的增加而增加,为彻底改善超高强混凝土的塑性,套箍指标Φ应≥0.48。推导出钢管高强超高强混凝土强度的计算公式和预测其本构关系的数学模型,结果证明强度计算值和本构关系预测结果与实测值吻合良好。

关键词：超高强混凝土钢管强度本构关系