锰硅合金铁水包耐火材料与砖型的选择与应用

分析了铁水包漏包机理，对铁水包耐火材料的材质进行了重新选择，应用于实践，取得了较好的经济效益。     

喜河水电站厂房工程窄长型仓面碾压混凝土快速施工技术

碾压混凝土施工技术历经探索期、发展创新期,已日趋成熟。作者自对碾压混凝土施工设备、施工工序、工艺技术进行了大胆设想、改进和创新,在喜河水电站厂房工程左右导墙及坝段窄长型仓面碾压混凝土施工中,保质保量、快速的完成了施工任务,取得了比较满意的效果。     

Characterization of nanocellulose‐ reinforced shape memory polyurethanes

BACKGROUND: Shape memory polymers are capable of fixing a transient shape and of recovering their original dimensions by the application of an external stimulus. Their major drawback is their low stiffness compared to smart materials based on metals and ceramics. To overcome this disadvantage, nanocellulose was utilized as reinforcement. RESULTS: Composites were prepared by casting stable nanocellulose/segmented polyurethane suspensions. The heat of melting of the polyurethane soft segment phase increased on cellulose addition. Composites showed higher tensile modulus and strength than unfilled films (53% modulus increase at 1 wt% nanocellulose), with higher elongation at break. Creep deformation decreased as cellulose concentration increased (36% decrease in 60‐minute creep by addition of 1 wt% nanocellulose). The nanocomposites displayed shape memory properties equivalent to those of the neat polyurethane, with recoveries of the order of 95% (referred to second and further cycles). CONCLUSIONS: It is possible to markedly improve the rigidity of shape memory polymers by adding small amounts of well‐dispersed nanocellulose. However, this improvement did not have substantial effects on the material shape fixity or recovery. Shape memory behavior seems to continue to be controlled by the polymer properties. Copyright © 2007 Society of Chemical Industry     

EFFECTS OF HEAT TREATMENT ON TENSILE PROPERTIES AND SHAPE MEMORY EFFECTS OF Ni-Ti-Nb ALLOY

ＥＦＦＥＣＴＳＯＦＨＥＡＴＴＲＥＡＴＭＥＮＴＯＮＴＥＮＳＩＬＥＰＲＯＰＥＲＴＩＥＳＡＮＤＳＨＡＰＥＭＥＭＯＲＹＥＦＦＥＣＴＳＯＦＮｉＴｉＮｂＡＬＬＯＹ①ＺｈｅｎｇＹｕｆｅｎｇ，ＣａｉＷｅｉ，ＬｕｏＹｉｃｈｕｎ，ＺｈａｏＬｉａｎｃｈｅｎｇＳｃｈｏｏ...     

简摆鄂式破碎机合理破碎腔的研究与应用

分析了影响破碎腔设计的几个因素，对破碎腔最大啮角的设计理论提出了修正，指出国内破碎机破碎腔的问题所在，给出了合理的腔形，并在几个矿山投入使用，取得了满意的效果。     

基于参数化的枪械外形设计策略

利用面向对象技术 ,对全枪外形以及外形离散件的参数化设计原理进行描述 ,通过 C语言的“类”对全枪外形、离散件外形、结构参数以及关联参数进行封装。对外形参数化研究的内容包括 :枪械外形的离散化 ,参数化模型的建立以及充分利用 CAD集成软件的图形功能对枪械外形参数化模型进行显示。经验证 ,采用这种方法开发的软件系统性能达到原设计指标要求。     

Frictional and load‐carrying behaviours of micro‐textured sector shape pad thrust bearing incorporating the cavitation and thermal effects

Frictional and load‐carrying behaviours of micro‐textured sector shape pad thrust bearing have been explored and reported herein. The textured pad surfaces have been generated employing different cross‐sectional shapes (circular, square, trapezoidal and triangular) of grooves. Based on the thermohydrodynamic lubrication analysis, it is observed that when the adopted texture pattern is placed on the pad towards the entry region, it produces substantial reduction in friction coefficient. The texture involving the square cross‐sectional shape of grooves has yielded substantial reductions in the friction coefficient in comparison with the conventional plain pad. Copyright © 2016 John Wiley & Sons, Ltd.     

液压弯辊力板形控制系统的特性分析与仿真研究

针对现有的液压弯辊力控制系统数学模型的不足,提出了一些改进意见。将液压弯辊系统分为两种情况,分析了系统特性。利用MATLAB软件进行了仿真,得出液压弯辊系统一些控制量的仿真曲线。仿真结果表明改进的仿真模型是正确有效的。     

中国传统民居建筑形式要素研究

对我国传统民居建筑的形状、空间、色彩等形式要素进行分析,力求从中窥探出我国村镇传统民居建筑所蕴含的历史文化背景和民族情感。     

深基坑SMW支护结构质量控制措施及监管要点

深基坑工程中的SMW支护结构具有较多优点,但需加强质量控制和监管.本文阐述了施工过程中搅拌成桩、型钢插入及回收等各环节的主要质量控制措施,并总结了工程质量监督机构从行为、资料、实体等方面进行质量监管的要点.