小港拱坝拱型优化研究

小湾拱坝双心圆、三心圆、椭圆、抛物线、双曲线、对数螺线和二次曲线等7种方案的拱型优化研究成果表明，小湾拱坝的最优线型是二次曲线，由椭圆和双曲线混合组成，坝体体积V＝630万m3，比抛物线的最优体形（V＝68783万m3）节省578万m3，建议小湾拱坝初设中考虑采用；对数螺线、双心圆和三心圆的坝体体积均大于700万m3，可予否定．     

利用袖珍程序计算器计算渠道输水损失及配水流量

在《计算渠道输水损失及配水流量的积分解法》《(农田水利与小水电》1987年第11期》)一文中,作者从渠道水最平衡原理出发考虑渠道防渗措施推,导出渠道输水微分方程,提出了计算渠道输水损失及配水流量的积分解法.该算法虽简便准确,但计算时需要许多辅助函数表,同时还必须满足q(x)=常数条件。笔者在该文的渠道输水微分方程基础上,提出了一种既适用于q(x)=常     

厂房屋面自防水混凝土施工

厂房屋面自防水混凝土施工洛阳关林净水厂是日供水量２４万ｔ的现代化花园式净水厂，其分项工程加药间和回收泵房是装配式屋面厂房。当屋面施工至第２层找平层作好后，天气骤变，阴雨连绵，且此种天气将维持１２ｄ左右，为不延误工期并确保工程质量，决定采用掺加ＵＥＡ膨...     

声波测井数据的深度域转换到时间域采样方法研究

用常规的深度域到时间域采样方法，对测井曲线或反射系数序列进行深时转换时，会丢失许多薄储层的信息，造成测井与地震资料匹配不好，井旁道子波提取不准，测井约束反演的剖面缺失薄层信息等后果，改进后的采样新方法不仅记录时间信息，还记录了层位信息，可以在深一时转换后保留更多的薄层信息，使测井资料与地震资料更好地匹配。     

才思敏捷 勇于开拓 辛勤耕耘 硕果累累─贺朱伯芳教授当选为中国工程院院士

才思敏捷勇于开拓辛勤耕耘硕果累累─贺朱伯芳教授当选为中国工程院院士董福品，厉易生，贾金生，许平，栾丰热烈祝贺本刊编委朱伯芳教授当选为中国工程院院士中国力学学会工程力学编辑部１９９５．６．２５朱伯芳先生当选为中国工程院院士，作为他的弟子，我们感到非常高...     

MGLS—19264点阵式液晶显示器显示汉字的方法及应用

ＭＧＬＳ－１９２６４是一种新型的大规模点阵式液晶显示器，它可以显示汉字，曲线及各种图形，在计算机控制系统中有着广阔的应用前景，本文介绍ＭＧＬＳ－１９２６４的引脚功能，用户可以很方便地通过８２５５和７４Ｃ９２２为接口的键盘来实现定值的设定，控制液晶显示器的各种显示及变压器的运行方式等。     

Testing of NAPL simulator to predict migration of a light nonaqueous phase liquid (LNAPL) under water table fluctuation in a sandy medium简

Nanoqueous phase liquid （NAPL） simulator is a powerful and popular mathematical model for modeling the flow and transport of non-aqueous phase liquids in subsurface, but the testing of its feasibility under water table fluctuation has received insufficient attention. The feature in a column test was tested through two cycles of water table fluctuation. The sandy medium in the column was initially saturated, and each cycle of water table fluctuation consisted of one water table falling and one rising, resulting in a drainage and an imbibition of the medium, respectively. It was found that the difference between the simulated and measured results in the first drainage of the column test was minor. However, with the propagation of the water table fluctuations, the simulation errors increased, and the simulation accuracy was not acceptable except for the first drainage in the two fluctuation cycles. The main reason was proved to be the estimation method of residual saturation used in this simulator. Also, based on the column tests, it was assumed that the resulting residual saturation from an incomplete imbibition process was a constant, with a value equal to that of the residual value resulting from the main imbibition process. The results obtained after modifying NAPL simulator with this assumption were found to be more accurate in the first cycle of water table fluctuation, but this accuracy decreased rapidly in the second one. It is concluded that NAPL simulator is not adequate in the case of LNAPL migration under water table fluctuation in sandy medium, unless a feasible assumption to estimate residual saturation is put forward.     

两种自动轴承环双端面磨床的上料机构

1.MZ7650双端面磨床的上料机构料斗式轴承环自动上料机构,专为高效率的MZ7650双端面磨床而设计的,本装置的结构原理如图1所示。这种加料装置包括一个料斗1,它的底部呈倾斜,其后面一边没有斗壁,而输送带装在悬臂2上循环回转,悬臂是由两块钢板装配成一个框架,悬臂上端及下端各装一对链轮9,绕以摩托车链条,下面的一对链轮由电动机通过变速箱13带动,上面的一对链轮(被动轮)在固定的轴心上旋转。在链条上每两节装有一块磨光的钢板3,这些钢板,朝上的一面依靠     

超轻Mg-Li合金

简述了Mg-Li合金的发展历史，总结了Mg-Li-Zn及Mg-Li-Al三元合金的力学性能及时效行为，并概括了几种Mg-Li合金的加工(处理)方法。     

Electrodeposition behavior of nanocrystalline CoNiFe soft magnetic thin film

1 Introduction Soft magnetic materials are a central component of electromagnetic devices such as step motors, magnetic sensors, transformers and magnetic recording heads. The electrodeposited CoNiFe alloy that possesses a very high saturation magnetic f…