For foundry sand from a famous domestic area , the curve of thermal expansivity with the temperature was described 本文最后给出了利用本装置测得的国内某著名铸造用原砂的热膨胀温度曲线。
2.
A thermal expansivity test device consisting of hating unit , attemperating unit , displacement transducer , recorder and so on , was developed to determine the thermal expansivity of new sand , clay - beaded sand , sodium silicate sand , resin bonded sand with the temperature or isothermally 摘要铸造用砂热膨胀性测试装置，由加热装置、温控装置、移位传感器、记录仪等组成，可实现铸造用原砂（亦可用于粘土型砂、水玻璃型砂、树脂型砂等）的随温和等温热膨胀性测试。
3.
Based on the object - oriented technique , this study defines four types of geographical event , i . e . expansivity , contraction , rebirth and vanishment events for management of land use data . and it further designed an object - superposition data updating model based on the land use feature of point , line and polygon ， which would take the advantage of the gis overlay function to effectly implement of updating spatial and attribute data 从面向对象的方法入手，定义了引起土地利用变化的扩展、收缩、新生与消亡四种地理事件，并分别按点状地物、线状地物和面状图斑的土地利用实体特征设计了对象叠加更新模型，从而能利用gis强大的空间分析能力，来有效地实现空间数据和属性数据的一致性更新。
4.
In the second chapter , the conceptions of solids - - - - - - - structure , compressibility , expansivity , specific heat capacity , bulk modulus , and some nonlinear parameters are reviewed and elaborated . the basic theory in the broad sense and polynomial forms of eoss are stated 由于本论文研究的重点对象是固态物质系统的物态方程，所以第二章首先是对固体的有关概念? ?固体的结构、拉伸压缩、热膨胀、热容量、及表征组成固体的大量原子作非谐性振动的一些非线性参量? anderson - gr (
