Phase Equilibrium in the System MgO-H2O at High Temperatures and Very High Pressures

Phase equilibrium in the system MgO-H₂O was investigated from 500° to 1450° C at 5 to 40 kbars by a quenching technique using a piston-cylinder apparatus. Brucite decomposed to periclase plus vapor at 810° and 10 kbars, 945° and 20 kbars, 1000° and 32 kbars, and 975°C and 40 kbars. The slope of the decomposition P-T curve became steeper with increasing pressure, infinite at 32^- kbars and 1000C, and then negative above 32 kbars. The extrapolation of this curve to lower pressures agrees well with data of other workers who used hydrothermal techniques.     

Phase Equilibrium in the System CrO2-Cr2O3

The CrO₂-Cr, O₃ equilibrium curve has been determined up to 35 kbars and 1400° C with a piston-cylinder apparatus. The phases were determined by magnetic, X-ray, and microscopic examination. The phase boundary can be represented by a straight line log P versus 1/T plot, where log P = 5.3 - 1400/ T. These results can be extrapolated to agree reasonably well with the results of previous investigations using gas pressure techniques.     

通信协议标准规格

开放式综合设备网络可以满足建筑物节能、引进设备控制网络、连接现有的各种电气设备网络协议、通过扩展因特网的方式构建广域建筑设备控制网络等要求。本文将对目前正在研究的,可望满足上述要求的设备控制网络的标准规格进行简要介绍。     

iopeNet及其目的

我们已经提出的新的开放式区域控制网络“iopeNet”是一个全新的概念,与现有的设备控制网络没有冲突。本资料就此加以阐释。     

Complex Permittivity Spectra of Various Insulating Polymers at Ultrawide‐Band Frequencies

Nowadays, trials to use even higher frequencies are pursued to realize high‐speed wireless communications. In order to respond to such a trend, dielectric properties of insulating polymers at high frequencies have to be clarified, although the importance of clarifying low‐frequency properties is still very high, especially for use as high‐voltage insulators. In this regard, complex permittivity spectra from 10 mHz to 4.0 THz were obtained for various insulating polymers. The spectra obtained in the very wide frequency range are important, because they can be a valuable database and they provide various pieces of important information on dielectric characteristics.     

Stabilization of a large‐capacity,long‐distance transmission system by an adjustable‐speed flywheel generator

An adjustable‐speed flywheel generator (FWG) can control both active power and reactive power rapidly. We have studied the effect of FWG installation on a large‐ capacity, long‐distance transmission system, especially when the system includes loops. In this paper, we describe the selection of FWG location, the selection of stabilizing control input signal, and the required quantities of FWG. FWG location is selected by a PQ‐sensitivity method, calculation of which is simple and permits easy understanding of the effect of both FWG's active and reactive power. As a stabilizing control input signal, we use bus voltage frequency instead of power flow because the flow changes stepwise by opening three‐phase single‐circuit. Additionally, we clarify the FWG quantities that must be designed, such as FWG's active power and reactive power. We considered FWG's slip to determine the quantity because the capacity of the exciter depends on slip. © 1999 Scripta Technica, Electr Eng Jpn, 127(2): 32–41, 1999     

日本开放式设备系统网络的现状与推广普及iopeNet的建议

在本刊特辑中我们介绍了“iopeNet”的相关技术以及应用系统,本文以日本开放式业务流程为基础提出方向性建议。具体来讲,是建议设立iopeNet推进中心以及尽早成立以此为目的的筹备委员会。     

开放式通信协议与节能

在本文当中,分别对以下两点进行了概述,一是“监测型”,即在建筑物机电设备中,以对节能措施实施计测、计量的结果为基础来改善应用;另一种是“控制型”,即对各类设备实施协调联动控制。此外,本文还就开放式通信协议对实现上述技术的重要性进行了论述。