穆斯堡尔谱数据的离线磁带转储

本文介绍一种可将MSC-85型穆斯堡尔谱按KC标准/Intel Hex格式记录在音频盒式磁带上的谱数掘解调后,通过RS232C接口输进IBMPC微型计算机的谱仪离线数据转储技术。     

固液相变蓄能的数学模型和自然对流换热系数的实验研究

引入自然对流换热系数 ,将固液蓄能数学模型简化为仅用能量方程加以描述。并通过实验测得相变过程的实际温度场 ,证明了自然对流固液相变换热的影响不可忽略 ,验证了固液相变界面移动速率随自然对流换热系数的增大而增大的定性关系     

Transient Green’s Tensor for a Layered Solid Half-Space With Different Interface Conditions

Pulsed ultrasonic techniques can be and have been used to examine the interface conditions of a bonded structure. To provide a theoretical basis for such testing techniques we model the structure as a layer on top of a half-space, both of different elastic properties, with various interface bonding conditions. The exact dynamic Green’s tensor for such a structure is explicitly derived from the three-dimensional equations of motion. The final solution is a series. Each term of the series corresponds to a successive arrival of a “generalized ray” and each is a definite line integral along a fixed path which can be easily computed numerically. Willis’ method is used in the derivation. A new scheme of automatic generation of the arrivals and ray paths using combinatorial analysis, along with the summation of the corresponding products of reflection coefficients is presented. A FORTRAN code is developed for computation of the Green’s tensor when both the source and the detector are located on the top surface. The Green’s tensor is then used to simulate displacements due to pulsed ultrasonic point sources of known time waveform. Results show that the interface bonding conditions have a great influence on the transient displacements. For example, when the interface bonding conditions vary, some of the first few head waves and regular reflected rays change polarities and amplitudes. This phenomenon can be used to infer the quality of the interface bond of materials in ultrasonic nondestructive evaluation. In addition the results are useful in the study of acoustic microscopy probes, coatings, and geo-exploration.     

推进波作用下的底泥起动

在介绍推进波作用下底泥起动特点的基础上，将上层水体作为粘性流体，底泥作为粘弹性体，推导了推进波作用下泥床面剪应力的表达式，并根据试验结果，给出了推进波作用下底泥起动时的床面剪应力与底泥流变参数的关系。     

船艇电站仿真与综合管理系统

论文介绍了船艇电站模拟器的组成和实时仿真功能,着重描述了多层次的图形管理系统及其仿真界面。课题将多媒体课件制作与模拟器有机地结合,涵盖了船舶主要电气设备的控制电路,既利于实践训练又便于原理的讲解,并在实践中取得了良好的效果。     

Effects of shear flow on long-ranged correlations,spinodal demixing kinetics,and the location of the critical point and cloud point

A derivation of an expression for the shear rate-dependent Ornstein Zernike structure factor is discussed, together with the resulting anomalous behavior of the turbidity. The predicted scaling behavior of the turbidity, comprising the effect of both temperature and shear rate, is in good agreement with experiments on binary fluids. Then initial spinodal decomposition is discussed, and an explicit expression for the time- and shear rate-dependent effective diffusion coefficient is derived, which shows all the typical characteristics of anisotropic light scattering patterns that are observed experimentally for binary fluids. Next it is shown that the spinodal is shifted linearly with the (bare) Peclet number for not too large Peclet numbers, whereas the cloud point is singularly displaced into the unstable region due to a shear now. This is in agreement with an experiment on a two-polymer/solvent mixture and binary fluid mixtures. It is argued that light scattering is useless to determine the location of the spinodal of a sheared system.Paper presented at the Twelfth Symposium on Thermophysical Properties, June 19–24, 1994, Boulder, Colorado, U.S.A.     

微机在应变测量中的应用

微机在应变测量中的应用，采用上位机和下位机组合方式．上位机为一台ＩＢＭ－ＰＣ／ＸＴ微机，用于对数据进行后处理．下位机以Ｚ８０－ＣＰＵ为控制器，由传感器、转换器、接口及外设等组成数据采集器，实施对应变、压力和位移等参数的采集、显示和打印（即数据的预处理）．上位机和下位机之间的数据传输，采用串行的方式，通过ＲＳ－２３２接口完成．本文主要以应变的采集处理为例，介绍系统功能、硬件配置及软件设计．     

关于CEA混凝土膨胀剂的若干技术问题--与游宝坤同志讨论

作者阐述了CEA膨胀剂混凝土的膨胀量较大，干缩小，抗裂性能良好的特性，CEA与粉煤灰掺用提高强度，改善界面过渡层的性质，提高耐久性；CEA混凝土无Ca（OH）2溶出问题。文中列出GBJ119应用技术规范，说明CEA可用于防水工程。     

化工生产中的“界面”现象对工艺设备的影响

分析了化工生产过程设备、管道中存在的各种“界面”现象及其影响，并提出相应对策。