Performance prediction for Grid workflow activities based on features-ranked RBF network

Accurate performance prediction of Grid workflow activities can help Grid schedulers map activities to appropriate Grid sites.This paper describes an approach based on features-ranked RBF neural network to predict the performance of Grid workflow activities.Experimental results for two kinds of real world Grid workflow activities are presented to show effectiveness of our approach.     

对大学生休闲辅导的思考

休闲辅导是指帮助学生确立正确的休闲观念和态度,获得必要的休闲知识和技能,以及学会安排有益的休闲活动方式,从而使自己获得充实而丰富的休闲生活,发展自己的才能与个性。休闲辅导是促进人的全面发展的重要手段,休闲辅导有助于消除目前大学生休闲中存在的问题。辅导大学生休闲活动要把握健康休闲活动的标准,明确大学生休闲辅导的目标,选择适宜的休闲活动内容,遵循大学生休闲活动的原则,拓宽大学生休闲辅导的途径。     

本科生分子生物学实验教改中存在的问题及对策

作者结合自己分子生物学实验教学经验,介绍了教研室本科生分子生物学实验教学改革现状,肯定了实验教学改革效果,同时对改革中存在的问题进行深入分析,并提出相应对策。     

游离氯对曝气生物滤池短程硝化的影响

研究投加游离氯对曝气生物滤池(BAF)实现短程硝化的可行性,考察游离氯对亚硝酸盐积累的作用规律,并探讨改变加氯量和氯的投加方式对稳定维持BAF亚硝酸盐积累的影响。研究结果表明,通过加氯可以实现曝气生物滤池亚硝酸盐的积累;当进水游离氯质量浓度为4 mg/L时,BAF系统连续运行20 d后亚硝酸盐积累率可达60%~70%;当系统形成稳定的亚硝酸盐积累时,降低进水游离氯的质量浓度能够稳定维持亚硝酸盐积累;间歇加氯在一定程度上也能够维持亚硝酸盐积累。     

《南方文坛》与90年代以来的广西文学

《南方文坛》和90年代以来的广西文学是在互动中共同成长、共同发展的。它始终以推介广西文学为己任。通过设置品牌栏目和策划、举办、参与文学活动等形式，为广西文学的持续发展提供理论支持和营造良好的批评氛围，培养和扶持一批青年作家和批评家，对广西文学的崛起和广西文学整体推向全国文坛作出了突出贡献。     

生物教学中多媒体技术与合作学习模式的互补应用

近年来国内引入一系列国外效果较好的教学理论以进行新一轮课程改革.其中多媒体技术成为学生感性认识生物的有利工具,合作学习成为培养学生自主学习能力的有效模式.两者在国内教学推广中效果显著,但其中存在着不可忽略的问题.本文将分析两者在高中生物教学应用中各自出现的问题,提出两者恰当结合解决问题的策略,以期高中生物教学更好地达到新课改的目标.     

Phytoseiidae from date palms in Israel with descriptions of two new taxa and a key to the species found on date palms worldwide (Acari: Mesostigmata)

The old world date mite Oligonychus afrasiaticus (McGregor) is an important spider mite pest of the date palms Phoenix dactylifera in most of North Africa and the Middle East. To identify potential predators of this key pest we monitored the phytoseiids in the date palm canopy and on the orchard floor for three consecutive years in the Southern Arava Valley of Israel. In this study we report on the phytoseiid species found. We describe two new species, Neoseiulus cozae and Typhlodromus shoshae, and redescribe seven species, Proprioseiopsis beatus, Neoseiulus marginatus, N. conterminus, N. rambami, N. bicaudus, Cydnoseius negevi and Typhlodromus athiasae, found on date palms or on the understorey Bermuda grass, Cynodon dactylon, gramineae in these orchards. A key to all species collected from date palm orchards worldwide is given. Proprioseiopsis beatus, N. marginatus and N. conterminus are recorded for the first time in Israel.     

Presence of hepcidin-25 in biological fluids: Bile,ascitic and pleural fluids

AIM: To examine body fluids such as ascitic fluid (AF),saliva,bile and pleural effusions for the presence of hepcidin using a novel radioimmunoassay (RIA).METHODS: Serum samples were collected from 25 healthy volunteers (mean age: 36 ± 11.9 years,11 males,14 females).In addition bile was obtained from 12 patients undergoing endoscopic retrograde cholangiopancreatography (mean age: 66.9 ± 16.7 years,M:F = 5:7).Saliva was collected from 17 healthy volunteers (mean age: 35 ± 9.9 years,M:F = 8:9).Pleural and AF...     

仿生裂缝自愈合混凝土

文章介绍了一种新型的工程建筑材料——仿生裂缝自愈合混凝土，这种材料的特性是，当混凝土材料出现裂缝时，部分液芯纤维或胶囊破裂，黏结液流出渗入裂缝，黏结液可以使混凝土重新愈合。     

PSBAD菌体蛋白生物效应评价

本文从三方面试验,较完整地评价了PSBAD 的生物学效应.结果表明:(1)PSBAD 粗蛋白含量18.67%,脂肪含量0.83%,糖份微量.粗蛋白质量较好,表观消化率57.17%,净利用率50.94%,生物价89.(2)LD_(50)>10g/(kg 体重),Ames 试验、精子畸变试验和微核试验均呈阴性.(3)肉鸡喂养试验中平均增重180g,料肉比减少0.5,且呈现抗病防病、增加免疫力的趋势.为此,建议PSBAD 作为一种优质安全的饲料添加剂.