钢岔管单线展开图的数解法

工程中常见到钢岔管单线展开图一般用图解法，本文对两种岔管用妥析方法推导出主管和岔管单线图展开公式，并已运用于工程实际。     

单位分数和表1解的树结构

对单位分数和表1问题，将k=3，k=4，k=5的解结果加以分析并提出了分蘖、亚分蘖、拔节以及树结构的概念。     

ON THE ISOMORPHISMS OF SMOOTH ALGEBRAIC CURVES (Ⅰ)

ＯＮＴＨＥＩＳＯＭＯＲＰＨＩＳＭＳＯＦＳＭＯＯＴＨＡＬＧＥＢＲＡＩＣＣＵＲＶＥＳ（Ⅰ）ＤＵＨｏｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＳｙｓｔｅｍｓＳｃｉｅｎｃｅ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｂｅｉｊｉｎｇ１０００８０，Ｃｈｉｎａ）Ａｂｓｔｒａｃｔ：Ｉｎｔｈｉ...     

关于图书馆总分馆自动化管理平台的搭建

介绍了图书馆如何利用现代网络建立总分馆的自动化管理平台,论证了丹诚DataTrans图书馆集成系统在总分馆自动化管理平台中的可行性。     

不同曲率支管弯管对T型管湍流混合下热疲劳的影响

为了探究不同曲率支管弯管对T型管冷热流体混合下热疲劳的影响,分别对支管上游曲率为0.006、0.01、0.02这3种弯管结构的T型管内冷热流体的混合过程进行大涡模拟（LES）,将计算得到的瞬时温度和压力载荷动态地加载到固体域进行流固耦合计算,得到管道的热应力分布情况;再利用雨流计数方法对获得的波动热应力进行统计学分析,根据线性疲劳损伤累计准则进行热疲劳评估,得到管道的无量纲累计疲劳损伤率。将各个结构的无量纲时均温度、无量纲均方根温度和无量纲热疲劳损伤率等进行对比,数值结果表明：3种结构的温度和应力的分布和波动相似;随着曲率的增大,温度波动变得剧烈,而相贯区热应力集中逐渐减弱,同时其无量纲累计疲劳损伤率呈降低趋势。     

一种含整数型两层决策问题的求解方法

本文利用拉格朗日松驰技巧为两层决策问题构造了简单的线性定界函数，针对上层决策变量为０－１变量的两层决策问题，提出了一种分枝定界算法。文中给出的算例说明了算法的有效性。     

关于整数整除判别方法的几个命题

论述了整数整除性的若干判别方法     

用球形孔扩张理论估算支盘桩扩孔挤压效应

将球形孔扩张理论应用到支盘桩扩孔时径向应力的计算,考虑到扩孔时的油压数据,求得某一孔压下的支盘力,据此估算单桩极限承载力。通过现场静载荷试验,对比和分析了支盘桩与直杆桩承载力的大小,结果表明在相同条件下,支盘桩的承载力比直杆桩提高了75%,这充分说明了支盘桩在承受大吨位荷载方面具有较大的优越性。     

一类微分方程的奇点

研究一类解具有奇点的微分方程,在一定条件下,得到了方程解可能具有的形式和方程系数可能具有的形式.     

Optimal Component Types for the Design of Construction Processes

Within the project preparation phase, experienced professionals manually map design information onto process information with the aim to develop realistic and practical schedules. Unfortunately, the mapping itself is neither part of any underlying data model nor is it supported by current scheduling tools. As a consequence the process of setting up the data model for a schedule is still not supported formally. Huhnt and Enge described a modelling technique that addresses the missing linkage between design and process information[1]. The approach makes use of so called component types. These are template sub-processes that describe the fabrication procedure of typical building components. Decomposing the building into com-ponents and assigning a component type to each component allows for formal support while scheduling. Depending on the decomposition of the building into components and the complexity of the involved component types the specification effort differs. The question about optimal component types arises: Which layout of building components and component types results in minimal specification effort? This paper presents a branch and bound algorithm to determine optimal component types. For a given schedule, which has been modelled based on component types, all possible decompositions into sub-processes are determined. During the decomposition process the encountered configurations are compared. Those with minimal specifica-tion effort are registered. Theoretical and practical examples are examined and discussed.