ASP技术在Web数据库系统中的应用

介绍了ASP技术的结构、特点；详细说明了利用ASP访问Web数据库实现的方法；列举了应用ASP技术访问Web数据库的实例。     

Causal association rule mining methods based on fuzzy state description

1.INTRODUCTIONIn the research of intricate systemcontrol andcompli-cated affair reasoning,the problemof mechanismandcomputational model of reasoning has become a veryi mportant issue in the academic world.Thus the re-search of indeterminacyinductive automatic reasoningmechanismis more i mportant.In the development of current logic science,ani mportant trendthat the research of logic thought andmethod merged into logic language has taken place.Thus the intelligence reasoning procedure is r…     

Surface effects on static bending of nanowires based on non-local elasticity theory

The surface elasticity and non-local elasticity effects on the elastic behavior of statically bent nanowires are investigated in the present investigation. Explicit solutions are presented to evaluate the surface stress and non-local elasticity effects with various boundary conditions. Compared with the classical Euler beam, a nanowire with surface stress and/or non-local elasticity can be either stiffer or less stiff, depending on the boundary conditions. The concept of surface non-local elasticity was proposed and its physical interpretation discussed to explain the combined effect of surface elasticity and non-local elasticity. The effect of the nanowire size on its elastic bending behavior was investigated. The results obtained herein are helpful to characterize mechanical properties of nanowires and aid nanowire-based devices design.     

工程技术档案与城市规划建设

工程技术档案对工程的运行,安全有直接影响.要增强服务意识,注重运用,发挥好工程技术档案的作用.在档案的利用与服务中体现工程技术档案价值,以维护城市规划建设的安全运行.     

无公害草产品 紫花苜蓿栽培技术规程

本标准规定了紫花苜蓿品种的无公害栽培的环境要求、土壤耕作、播种、田间管理、病虫害防治，加工与利用过程中应注意的事项等。     

非晶薄带成型机转辊动平衡等级判据

为控制非晶薄带成型机转辊表面附加径向跳动度 ,运用动力学的观点对转辊不平衡质量引起的振动响应进行了分析计算 ,建立了其动平衡试验的精度的判据 .研究结果表明 ,要使辊面附加跳动度数值不超过要求数值 (2 0μm)的 5 % ,转辊动平衡精度等级不得低于G2 .5级     

快速凝固Al-Cu-Si薄带钎料真空钎焊锻铝合金的研究

与普通Al Si钎料相比 ,三种快速凝固Al Cu Si薄带钎料真空钎焊锻铝合金LD2对比实验表明 :快速凝固Al Cu Si薄带钎料具有钎焊温度低 (5 70℃ ) ,间隙小 (0 .0 5～ 0 .10mm) ,时间短 (10～ 15min)以及更高的接头强度等特点 ,其钎焊接头的拉伸强度接近甚至超过母材的抗拉伸强度(12 5MPa) ;钎焊强度随钎料中w(Cu)的增加而降低 .实验结果表明 ,快速凝固Al Cu Si薄带钎料是一种性能更好的新型真空钎焊钎料 .     

Plant microremains provide direct evidence for the functions of stone knives from the Lajia site,northwestern China

A large number of stone knives have been recovered from Neolithic archaeological sites in East Asia. However, direct evidence regarding the functions of the stone knives has been scarce, and hence, their functions have remained controversial. In this study, we recovered and analysed ancient starch grains and phytoliths from residues adhering to stone knives excavated from the Lajia site, Qinghai Province, northwest China, thus providing direct evidence for the functions of the knives. Our anal- yses were based on the following： （1） an assemblage of 278 identifiable starch grains, representing grains from the stems of foxtail millet （Setaria italica） and broomcorn millet （Panicum miliaceum） （65.1% of the total） and the stems of Hordeum and Triticum species （3.6 % of the total）, and （2） an assemblage of 361 identifiable phytoliths, the majority of which were from the stems and leaves of plants such as Panicoideae and related taxa （96 % of the total）. Our study demonstrates that one of the functions of the stone knives was the harvesting crops. In addition, a few starch grains from food legumes and roots （3.4 % of the total） indicate that the stone knives were also likely used to process, peel and cut some foods.     

Al80Ni15-xY2Zr3Cux合金的非晶形成能力及其热稳定性分析

用单辊旋淬法制备了Al80Ni15-xY2Zr3Cux (x=1、3、4、6、7、9)铝基非晶条带,通过XRD和DSC等测试手段研究了合金体系的非晶形成能力和热稳定性.研究结果表明,该合金体系均具有一定的非晶形成能力,不同w(Cu)的体系的非晶形成能力和热稳定性有较大的差别,组分原子的相互匹配对合金体系的非晶形成能力起重要作用.当x=4时,体系具有最强的非晶形成能力,可形成完全非晶,其初始晶化温度为281.3 ℃.适当的w(Cu)的添加可提高体系的非晶形成能力,但过量铜会促使晶化相(如α-Al相)析出,随w(Cu)的增加,体系的热稳定性逐渐降低,体系的非晶形成能力与热稳定性不是同步变化的,是由不同的机理所决定.