RELATIONSHIP BETWEEN PRIMARY MORPHOLOGY AND CRYSTAL STRUCTURE OF CARBIDES GROWING IN SUPERALLOYS

The SEM analysis of decply etched specimens of Ni-base superalloys K38 and K19H+Ta in-dicates that both the primary morphologies under normal growth conditions and the finalmorphologies near equilibrium of MC carbides are octahedral blocks.The classification ofMC crystal faces by means of PBC(Periodic Bond Chains)theory confirms that{100},{110}and{111}are F faces,and that{212}are S faces.The calculations of the attachmentenergy for each F face show that{111}are most easily appeared.It has also been inferred thatone of the MC growth units is a coordination octahedron composed of one metal atom sur-rounded by six carbon atoms.The octahedral growth units can be attached to the growth sur-faces of MC carbides through laver stacking mechanism on the{111}faces.     

镍铁型焊条焊接高强球铁接头云纹实验解析研究

镍铁型铸铁焊条已经相当广泛地用来焊接QT60—2球墨铸铁。然而,研究工作表明,这些焊接接头的强度较低。本文首次利用密栅云纹法研究了单向拉伸焊接接头的受力状况,获得了接头区域的全场位移、应变和应力分布。从焊接接头应变和应力分布的不均匀性,分析了裂纹产生及扩展的原因,用扫描电子显微镜观察了断口形貌,发现有大量的球状物分布在断口上,这可能是导致焊接接头低应力破断的原因。这一次现有助于改进镍铁型铸铁焊条的性能,提高接头的强度。     

MICROSTRUCTURE OF MARTENSITE IN Cu-14Al-4Ni ALLOY AGED FOR A PROLONGED TIME AT ROOM TEMPERATURE

The microstrueture in shape memory alloy Cu—14Al—4Ni aged for two years at room temper-ature has been studied,and the substructure slow change has been observed.The domains ofhighly ordered phase and the transition regions appear at grain boundaries,the twin bounda-ries damage.Furthermore,the microstructure also gives the appearance and growth ofantiphase domains like rectangular network.The long period antiphuse boundary structuresand the antiphase domains have bee.observed first at the single diffracted vector .The con-centration gradient of solute atom Al has heen found from the matrixes to the grain bounda-ries,the matrixe is poor in Al and the grain boundaries are rich in Al.     

EFFECT OF MICROSTRUCTURE ON CORROSION FATIGUE BEHAVIOUR OF A LOW CARBON BAINITE STEEL

The behaviour towards corrosion fatigue of low carbon bainite steel with variousmicrostructures after tempered at different temperatures has been examined. The susceptibilityof the steel to corrosion fatigue may be improved by tempering at 300℃.     

塔北隆起张性构造带形成机制与油气关系

塔北隆起张性构造带分布于隆起轴部的轮台断隆上,主要为早期断裂受喜马拉雅运动早期的左旋扭动在浅层派生的北西-南东向张性构造.断裂在平面上呈左行雁列展布,在剖面上为小型地堑组合,部分断裂向深部与先存断裂联合形成负反转构造.与断裂相伴的褶皱构造沿断裂走向分布,且受断裂活动控制.塔北隆起张性构造带位于极有利的构造部位,具有良好的油气远景.     

断层垂向封闭模式及研究方法

在深入研究断层垂向封闭机理的基础上，建立了断层垂向封闭的三种地质模式，并利用断层面压力、断移地层的砂泥比值和断层填充物与围岩声波时差的相对关系，分别研究了三种不同地质条件下的断层垂向封闭性。实例应用表明，这些方法用于研究断层垂向封闭性是可行的。     

Old-age Care Modes and Facility Planning Based on the Concept of “Continuum of Care”

Through the comparative analysis on the theories and practical experience of the development of old-age care (OAC) in both China and other countries,and based on the interview and questionnaire survey in Zhejiang Province and Hangzhou City,this paper proposes the research and analysis framework for the old-age service system,i.e.,"OAC mode-OAC service system-OAC facility system." The paper argues that,oriented by OAC mode of "taking community-and home-based care as the main body and institution-based care as supplement," China should build an OAC facility system and planning thoughts that take "continuum of care" as concept and long-term care system as core.Taking Zhejiang Province and Hangzhou City as examples,the paper conducts the optimization research on current OAC facilities planning in terms of hierarchical system,scale,and differentiation,so as to formulate more systematic and operable planning standards for OAC facilities.     

ARTIFICIAL NEURAL NETWORKS FOR CONSTRUCTION BID DECISIONS

An Artificial Neural Network (ANN) approach was explored for supporting construction bid decisions, since such decisions are heavily dependent on practitioner expertise, which in turn is generally encapsulated in case histories. One of the ANNs described here was trained on knowledge from a sample of the entire Sri Lankan construction industry, and was used to predict the preferred job sizes for firms of differing characteristics; such information could help firms in their bid/no-bid decisions. The other ANN was trained on case histories elicited from a single contractor, and was used to predict the percentage mark-up. The network outputs were obtained in both binary output and continuous valued output formats. The former format had some distinct advantages over the latter, as it provided greater information for decision making instead of being a “black box” output. The influences of the middle layer size, output format and allowable error during training, on the training duration and accuracy of prediction were studied.     

Mo－Ni／HM催化剂的研究

研制应用于正戊烷异构化的非贵金属催化剂Ｍｏ－Ｎｉ０／ＨＭ。以丝光沸石作载体，经两次２ｍｏｌ／Ｌ的ＮＨ４ＮＯ３铵交换，一次质量分数为０．３６的乙酸交换；用常规方法在室温下先后浸渍活性组分Ｍｏ，助催化剂组分Ｎｉ，ｗ（Ｍｏ）与ｗ（Ｎｉ）的最佳配比为３．２％：１．０％，焙烧温度为４７５℃。在临氢高压微反－色谱联合装置上对该催化剂进行考察，工艺条件为：反应温度３４０℃，压力３．０ＭＰａ，空速１．０ｈ－１，氢油摩尔比４：１。结果为：异戊烷收率达到５５．２％，≥Ｃ５液体收率为９５．２％。研究表明，此催化剂具有活性高，选择性好，成本低等特点，异构化性能优于只用两次铵交换、不同焙烧温度的其它催化剂。     

智能化大厦的构成,技术与发展

本文从智能化大厦的背景出发，详细描述了智能化大厦的构成、所涉及的技术和提供的服务功能；并介绍了国内外智能化大厦的发展情况及其未来应用。