R407C组分分离特性实验研究

针对H407C三元混合工质的非共沸特性,在组分分离实验台上进行了相应的分离实验。结果表明：不同的分离器在不同的加热功率下的分离效果不同;经过组分分离实验,R407C的组分有明显的改变,并且在一定的实验工况下可以得到较好的分离效果。经分离后,轻、重组分最高比例可达48．71％和98．23％。     

熔融碳酸盐燃料电池(MCFC)用γ-LiAlO_2粉末的制备

本文简介了熔融碳酸盐燃料电池(MCFC)及其优点;叙述了合成LiAlO_2的方法,用Al_2O_3(a,γ)成功地制得了稳定的适合于MCFC用的γ-LiAlO_2,在MCFC工作温度(923K)下,β-LiAlO_2是不稳定的;973-1073K时,β-LiAlO_2向γ-LiAlO_2转变速度明显增大;a-LiAlO_2要在1073K以上转变为γ-LiAlO_2.     

222Rn在大气输运研究中的示踪应用

本文简要回顾了222Rn及其子体示踪应用的主要方面,介绍了国内外对利用222Rn及其子体在预报地震和大气物质输运研究这两方面的工作.对这些示踪应用而言,要进行准确的定量分析和数值模拟,必须对222Rn及其子体在大气中的输运规律有细致的了解,这一点可以通过研究其动力学特征,建立输运模型来实现.本文中列举了部分对222Rn及其子体输运模式的研究,对比上层大气中的简单输运模型,一个比较全面的222Rn输运模型还需要考虑地表层结大气中的复杂的动力学因素,并将其作为222Rn在上层大气输运模型中的下垫面边界条件.     

A deep-learning-based prediction method of the estimated ultimate recovery(EUR)of shale gas wells

The estimated ultimate recovery(EUR)of shale gas wells is influenced by many factors,and the accurate prediction still faces certain challenges.As an artificial...     

射频电容液位计在海上溢油液位检测中的应用

简单介绍了射频电容液位计进行油水双液位检测的基本原理,阐述了海上溢油回收检测装置的基本构造及其工作过程。针对海上特殊应用环境的测量需求,提出分别按油、按水标定的液位检测方案。油水混合状态下,对2组实验测试数据进行误差和线性度的数值计算,通过曲线拟合对比分析,最终确定了海上溢油回收集油箱油位检测的最优化方案—按油标定检测。实验证明,该方案可以满足现场实际测量环境的要求,液位计的测量精度高、线性度好。     

厚壁容器圆柱壳开孔应力集中问题(Ⅱ)

根据厚壁圆筒形压力容器开孔应力集中系数的一般表达式，利用正交函数展开的方法，将厚壁圆柱壳的开孔应力问题简化为求解一组无穷代数方程组问题为说明复变函数分析方法的适用性，给出了圆筒形压力容器在自由边界条件下，开圆孔和椭圆孔应力集中系数的数值结果     

A Design-Based Structural Test Method for a Switched-Resistor DAC

In this paper, a design-based structural testing method is presented to enable a fast, low cost test for a switched-resistor digital-to-analogue converter (DAC). A 24-bit stereo DAC is used to demonstrate this. After schematic-level simulations and experimental verification, it is found that the dynamic parameter THD can be predicted by the static test. Practical production wafer test and final test results evaluate this structural test method by comparing it with the traditional THD test method. In this paper the simulation results, the relevant measurement results, and the testing results are discussed. Finally, the application recommendations are given.

DMP—30对高温固化环氧树脂体系的促进作用

通过差示扫描量热法分析发现,ＤＭＰ－３０对高温固化环氧树脂体系有明显促进作用,加入适量的ＤＭＰ－３０可使体系固化温度降低,固化速度加快。另外还确定了ＤＭＰ－３０的最佳用量     

LIQUID-LIQUID EQUILIBRIUM OF THE SYSTEM WATER-PHOSPHORIC ACID-DI-N-PROPYL ETHER AT 25 AND 40°C. INFLUENCE OF THE ISOMER PROPYL-ISOPROPYL ETHER ON THE APPEARANCE OF THREE LIQUID PHASES AT EQUILIBRIUM.

Solubility and liquid-liquid phase equilibrium data have been determined for the ternary systems Water-Phosphoric Acid-Di-n-propyl Ether as supplied by Merck (with about 6.4% of the isomer propyl-isopropyl ether), and Water-Phosphoric Acid-Di-n-propyl Ether (rectified up to less than 1% of propyl-isopropyl ether), at 25 and 40^°C The temperatures at which three liquid phases at equilibrium appeared were 28.0-28.2^°C and 49.0-50.0^°C, respectively. The presence of the isomer propyl-isopropyl ether causes these systems to split into three liquid phases at equilibrium