Invariants of the Markov process by the transformation of variables

The guassian Markov process plays an important role in the identification and prediction of systems and the spectrum estimate of the time series. However, we are often confronted with the non-gaussian time series. In this paper, a method is discussed which transforms the data from non-gaussian to gaussian. It is shown that this procedure preserves the amount of Kullback information under the transformation. To verify the transformation statistically computer simulation was carried out.     

Feedback method of production ordering system in multi-stage production and inventory systems

This paper deals with the problem of developing a production ordering system which maintains high reliability and productivity of multi-stage production and inventory systems with capacity-constraint and machine breakdown. In this paper, two ‘push type’ production ordering systems (Matsuura and Soshiroda 1981) are proposed according to information feedback methods. The influence of forecasting error, the difference between forecasted demands, down-time, and the backlog caused by the restriction of production capacity, upon the production and inventory levels is analysed by each production ordering system. The results indicate that, in designing an effective production ordering system, a feedback method must be chosen according to the conditions of the average loading ratio, the down-time, and the autocorrelation coefficient of demand.     

SOLVENT EXTRACTION OF SOME TERVALENT LANTHANOIDS WITH 4-ACYL-3-PHENYL-5-ISOXAZOLONES

ABSTRACT

The solvent extraction of some tervalent lanthanoid ions (Ln³⁺) with five 4-acyl-3-phenyl-5-isoxazolones (AcyPI or HL),i.e. 4-acetyl-, 4-benzoyl-, 4- (4-toluoyl)-, 4- (4-fluorobenzoyl) - and 4-(4-nitrobenzoyl)-3-phenyl-5-isoxazolones (API,BPI, TPI, FBPI and NBPI respectively) into benzene was studied in the presence of tri-n-butylphosphate (TBP). The extracted species were (Ln³⁺) (L^-)₃ (TBP)₂ for AcyPI.     

MEMS Resonator‐Based Insulated Voltage Sensor Withstanding Higher Voltage

The Si resonator is applied for measuring the voltage in a highly isolated manner. The working principle is based on the resonant frequency shift caused by the electrical field from the electrode connected to the high‐voltage source (supposing the battery). Here, the resonator is electrically floated, and its potential is decided by the relative position against the electrodes which are connected to the high voltage and the driving voltage. The induced voltage on the resonator is analyzed against the driving frequency. The resonance is found by the paired peaks in the amplitude curve. The setup for the electrical measurement can make the sensor system compact. A new sensor design for avoiding the electrical field concentration realizes the measurement over 400 V without the breakdown. This will match with the high‐voltage dc power supply system.     

High-Pressure Synthesis of Perovskites Pb(Li1/4Nb3/4)O3 and Pb(Li1/4Ta3/4)O3

Complex perovskite-type compounds with the general formula Pb(B⁺_1/4B⁵⁺_3/4)O₃, where B⁺= Li⁺ and B⁵⁺= Nb⁵⁺ or Ta⁵⁺, were synthesized using a high-pressure technique and studied by X-ray powder diffraction. The X-ray patterns were indexed on the basis of a cubic cell with a ₀= 4.071 Å for Pb(Li_1/4 Nb_3/4)O₃ and a ₀= 4.052 Å for Pb(Li_1/4Ta_3/4)O₃. Electrical properties of the new perovskites were also studied.     

Estimation of the order of autoregressive process

Though there are several methods for estimating the order of the autoregressive process, it is hoped that it can be estimated with high sensitivity. In this paper, an approach based on an information measure which characterizes the autoregressive process has boon made to the estimation of the order of the process. A mixing operator, which is found by adding an independent random variable to the sub-sequence of the original data sequence, is introduced. By applying the operator to the conditional entropies, we developed a statistic which estimates the order of the autoregressive process. Results of computer simulation are presented to verify and compare this algorithm with other methods.     

采用光学方法研究陶瓷绝缘材料的沿面闪络特性

对比研究了真空中交流电压下采用和未采用真空溅射金属电极的氧化铝陶瓷材料,在沿面闪络发生前不同的表面发光特性。基于固体的能带理论,提出了２类试品在金属电极－介质的界面处不同的能量状态分布模型;并在此基础上同时考虑电荷注入复合和场致电子发射对发光的影响,解释了２类试品发光的差异性,指出了采用和未采用真空溅射金属电极的氧化铝陶瓷存在不同的沿面闪络起始机理及发展过程。     

东京成德学园十条台校园与明治大学生田第二校舍A馆

东京成德学园十条台校园1.城市景观的改善与校园的再构成东京成德学园是一个在东京,千叶、埼玉拥有大学、短期大学、高中、初中及幼儿园的综合学园,其中十条台校园是于1965年开设的以短期课程为中心的大专教育基地。该校园位于安静的住宅区     

鞋材料革的卫生研究

我们在鞋内卫生方面完成了系统研究，并注明了条件。本文中，我们报导了湿气的累积和微生物的生长取决于鞋的不同材料。我们得出结论，鞋的用料和结构对累积湿气和它对微生物环境的影响方面是最重要的卫生因素。