The center manifold reduction technique is applied to the generalized laser Maxwell-Bloch equations. In comparison with the adiabatic elimination technique, it introduces a small diffusion correction, which does not change the main dynamical behavior of laser field equation. 利用中心流形定理对广义激光Maxwell-Bloch模式方程进行化简,与绝热消去法比较,这将引入小的扩散修正项,但它并不改变激光场方程的主要动力学行为。
The results of its application to actural project showed adiabatic temperature change of mass concrete could be efficiently controlled, excellent workability and compressive strength satisfied with design could be ensured. 实际工程应用结果表明:用该准则得到的最佳配合比,能有效地控制大体积混凝土的绝热温升,保证其高耐久性、优良的工作性与满足设计要求的强度。
The results show that this equipment has the merits of simpleness& economy and the adiabatic temperature change of magnetic refrigerants is conveniently and truly measured by using this equipment. 实验表明:该装置结构简单、经济实用,能较方便、准确地测量磁工质的绝热温度变化。
The Curie temperature is 323 K and the maximum adiabatic temperature change is 0.29 K. 此材料的居里温度为323K,最大绝热磁温变为0.29K。
Equipment for adiabatic thermal change of concrete and its application 混凝土绝热温升测试仪的研制及其应用
Calculation of Adiabatic Temperature Change of Mass Concrete of Foundation in High-rise Building 高层建筑基础大体积砼绝热温升计算
The correct way is to take metal Gd as the benchmark magnetic refrigerant, and to estimate the variables such as adiabatic temperatures change, working region of temperatures and volumetric magnetic entropy change of the material completely by comparing the new developed magnetic refrigerants with Gd. 应该以金属钆作为室温磁制冷材料的基准材料,全面评定各个新开发的磁制冷材料的绝热温变、使用温度区间、单位体积磁熵变等参数。
Simultaneity, the magnetic entropy change and adiabatic temperature change which measured directly also increase as increasing B content, and show large magnetocaloric effect at lower magnetic field. 同时,磁熵变和直接测量的绝热温变也随着B含量的增加而增大了,在低磁场具有较大的磁热效应。
Calculated results showed that both the entropy change and the adiabatic temperature change show the maximum near the magnetic phase transition temperature, which is in good agreement with the experimental results. 2. 研究表明磁熵变化及绝热温度差都在磁相变温度附近具有最大值,我们的理论研究结果很好地解释了实验现象。
There are two forms of adiabatic shear bands in the sawtooth chips, which are deformation bands with no organizational change and transformation bands with obvious organizational refinement. 锯齿形切屑中存在两种形式的绝热剪切带,没有组织转变特征的形变带和组织明显细化的转变带。