基于电子商务的柔性工作流的研究

电子商务流程的易变性对工作流系统提出了增加柔性的要求.文章提出了一种基于电子商务的柔性工作流系统结构,并给出了其在电子商务中的一个具体应用网上购物的例子.     

聚氨酯泡沫上化学镀镍研究

实验给出了聚氨酯泡沫的粗化和化学镀镍工艺参数;研究了对化学镀镍沉积速度影响的因素,发现温度、还原剂和金属镍盐浓度是主要影响因素,随着温度的升高及还原剂与镍盐浓度的增大,镀速增加。化学镀镍后经电镀、热解和热处理制得泡沫镍。     

增强铜表面热喷涂涂层结合力的探讨

通过对紫铜基体采用超音速喷涂自溶性合金并进行热处理,使紫铜与自溶性合金界面产生微冶金结合区,从而增强结合力。     

Study on Surface Treatments on CdSe Wafers

The surface treatments on CdSe wafers were studied by means of SEM, XPS and micro-current test instrument. The relations between electrical properties of CdSe wafers and surface topography, composition and structure were analyzed. The results show that the change of surface composition by etching is beneficial to decrease leakage current. Meanwhile, the increase of oxygen on surface caused by passivation can largely decrease leakage current. When passivating time is 40 min, the wafers surface appears smooth and compact, which will decrease the density of surface state, the optimal electrical property of the wafer is therefore obtained.     

Reflections on "Reflections on introspection."

Comments on J. Radford's (see record 1974-26503-001) reflections on introspection as event and process and argues that they reflect prevalent misconceptions and distortions of the behaviorist view of the status of introspection in psychological inquiry. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

絮凝剂对冷轧乳化液的影响研究

为解决宝钢1550mm冷轧厂酸轧机组硅泥产生的喷射梁和石墨加热器等设备的堵塞问题,新工艺要求在酸洗液中加入絮凝剂以加速硅泥的沉降.文章就絮凝剂对冷轧乳化液的影响进行了研究,考察絮凝剂对乳化液的破坏作用,寻找对乳化液产生负面影响的絮凝剂浓度,研究在酸洗液中加入絮凝剂对乳化液的影响程度.     

法兰盘黑纹缺陷分析

针对法兰盘加工面上出现的黑纹缺陷，采用光学显微镜、扫描电镜和电子探针等测试方法对其进行了分析。结果表明，黑纹缺陷是由聚集分布的硫化锰夹杂物及富磷的铁素体组成的偏析带。     

Subcommittee on Needed Research on Gifted Children. Needed research on gifted children.

Alist of 11 "troublesome, unanswered questions about gifted children, questions for which the lack of experimental answers is probably directly interfering with such children's receiving optimum guidance in homes, schools, and the community." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

还原剂对菱锰矿锰浸取率的影响研究

研究了3种还原剂（葡萄糖、双氧水及它们的混合物）及在还原剂下温度对菱锰矿中锰浸取率的影响。结果表明在浸取过程中，加入少量还原剂不仅能提高浸取率，还能降低反应温度和节能。在40℃，用3mL浓硫酸浸取4g菱锰矿粉时，添加0.33g葡萄糖和1.5mL双氧水，反应60min，锰浸取率达到98．33％。     

利用ASP技术实现线上考试的探索

随着信息技术的迅速发展,远程教育凭借其自身的优势必将是教育的又一次革命。通过ASP3. 0技术和Access 2000数据库技术相整合,可动态地从数据库中随机取得试题,实现远程在线考试。     

非自由表面大块晶体过热的初探

初步研究了非自由表面大块单晶A1及大块晶体Pb的过热.主要介绍通过有效的方法制得试样,用DSC-7准确测量出在包覆状态下大块单晶Al及大块晶体Pb的过热度,从而得出大块晶体过热的必要条件.     

Effects of ionizing radiation on cartilage: emphasis on effects on the extracellular matrix

In this report, we review data dealing with radiation effects on cartilage. More specifically, we emphasize on alterations caused in the extra-cellular cartilage matrix. Although radiation studies predominantly describe the effect on the structure of DNA and on the mitotic activity of cells, alterations caused by the effect on the non-mitotic activity can also be important. Cartilage, having an extracellular matrix composed of 2 major components, aggrecan and collagen, provides a good model to study this kind of radiation effects. The following topics concerning literature data are summarized: effects on the amount of matrix synthesized, effects on the activity of certain enzymes and effects on the structure and morphology of the matrix. Some new findings concerning the radiation effect on the size distribution of aggrecan-aggregate populations, de novo synthesized by chondrocyte cultures, either derived from calcifying or from non-calcifying cartilage, are given.     

GA-BP的铁钢界面铁水温度预测

铁钢界面铁水温度对炼钢生产的控制与优化具有重要意义.因此,为了更加准确地获取铁钢界面铁水温度,本文采用较大样本构建了基于遗传算法(GA)优化的BP神经网络铁水温度预测模型.对影响铁钢界面铁水温度的因素分析,选取了出铁时间、预处理时间、重罐时间、空罐时间、出铁铁水温度、预处理后铁水温度、铁水质量7个关键因素作为模型的输入...     

黄铁矿制酸烧渣冶金提纯试验研究

文章介绍了以广西某厂黄铁矿制酸烧渣为原料所进行的几种处理工艺的试验情况,其中以氯化湿法工艺效果最佳,不仅能有效回收其中的有价金属,而且可以产出合格的铁精矿.     

基于样条变换的非线性PLS的反应高炉炉温的参数预测

 高炉冶炼过程是一个大时滞、强非线性的系统,现有的高炉炉温预测模型不够准确,因此,建立了基于香农熵的广义相关系数时滞分析模型和基于样条变换的非线性偏最小二乘回归(ST-PLS)的反应炉温的参数预测模型,得出影响高炉炉温的主?问闹秃笫奔洌げ獬瞿芄蛔酆戏从Ω呗碌?个参数(［Si］,［S］,铁还原速率及铁水温度)。试验证明,模型具有较高的预测精度,当相对误差分别为0.11和0.18时,模型预测［Si］的命中率分别为0.7143和0.9184,［S］的命中率分别为0.7347和0.9184,铁还原速率的命中率分别为0.6122和0.8163,铁水温度的命中率分别为1.0000和1.0000。     

从施工图预算的角度浅谈工程造价的控制

详细论述了施工图预算的编制方法和依据，以及审核施工图预算的技巧，并从施工图预算的角度对工程造价进行了较为详细的分析，指出合理地进行施工图预算是控制工程造价的重要手段。     

Micro-raman studies on materials based on zirconium dioxide

Micro-Raman studies have been made on zirconium dioxide ceramics and crystals by the use of argon and helium-neon lasers. The Raman results for the crystals are appreciably affected by the wavelength, which is due to a luminescence spectrum more intense than the background (this is not usually characteristic of zirconium dioxide ceramics). When a crystal is indented, the monoclinic phase is detected only near the edges of the indent, so that process cannot be the cause of the rise in the surface around the indent. It is concluded that the crystals differ from the ceramics in that the monoclinic-tetragonal transition is not the mechanism that governs the mechanical behavior. Strength Problems Institute, Ukraine National Academy of Sciences, Kiev. Translated from Poroshkovaya Metallurgiya, Nos. 3–4(406), pp. 88–96, March–April, 1999.     

电弧炉炼钢发展循环经济的研究

介绍了电弧炉炼钢的发展概况,通过电弧炉炼钢流程的资源和能源特征,得出该流程是资源节约型和环境友好型的流程。最后,列举出电弧炉炼钢中符合循环经济"3R原则"的各项指标及其对应的节能降耗技术,说明短流程钢铁企业发展循环经济大有文章可做。     

基于金属合金的ICP-OES测定法研究

电感耦合等离子体发射光谱仪(ICP-OES)越来越多应用于金属含量样品元素测定中。本文基于ICP-OES方法的已知实验,得到该方法用于测定由硅铝钡制成的金属合金中的铝和钡金属元素合金。     

某地下矿山开采对井筒的影响性研究

采用MIDAS/GTS NX对某矿山的矿体、围岩、井筒的整体三维数值模型,论证设计对井筒留设12 m的保安矿柱的合理性,进行了有限元数值模拟分析。数值计算结果表明:从位移结果方面来看,在保安矿柱内部盲提升竖井范围内,在矿体上盘区域井筒发生最大竖直位移为-1.03 cm,矿体开采区域下盘井筒附近发生最大竖直位移为+0.41 cm,矿体开采对井筒产生的变形量较小;从塑性区结果来看,矿体开采后塑性区主要分布在矿体开挖空间附近,塑性区面积为22.1%,最大塑性变形为9.19×10^-4,在井筒周边岩体仅有少量单元发生塑性破坏。综合以上分析得出,某地下矿山设计提出的井筒设置12 m保安矿柱的方案合理。