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新型报—金属氧化物触头材料 被引量:12
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作者 m.ohta 田朝阳 《电工合金》 1994年第1期46-47,F003,20,共4页
由一种新型加工工艺发展了一种新型银—金属氧化物触头材料。新工艺是在更高的氧压下进行热处理(>10MPa),传统工艺氧压只有0.02~3MPa。新工艺使得银-金属(锡、镉、锌等)的氧化物材料有了许多特性。新工艺使银—氧化锡触头中含... 由一种新型加工工艺发展了一种新型银—金属氧化物触头材料。新工艺是在更高的氧压下进行热处理(>10MPa),传统工艺氧压只有0.02~3MPa。新工艺使得银-金属(锡、镉、锌等)的氧化物材料有了许多特性。新工艺使银—氧化锡触头中含有占总重量6%~10%的锡,而传统工艺不行。新的触头材料是在银合金中扩散直径在几纳米到几十纳米之间的金属氧化物粒子。这层氧化物,可以极大地提高触头抗熔焊和抗电弧侵蚀的能力。它们比传统内氧化工艺的材料有更高的强度。它们适于做大的触点。触头的厚度可以在原有的基础上减至一半,因为新工艺不会产生耗尽区。 展开更多
关键词 金属氧化物 触头材料
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The course of science and technology,and acoustics:past,present and future——turning to information acoustics
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作者 m.ohta E.Uchino 《Chinese Journal of Acoustics》 1992年第3期213-223,共11页
In this paper, the historical development of acoustics has been briefly reviewed. It can be concluded that acoustics study has been developed along with the same atream of the historical developments of science and te... In this paper, the historical development of acoustics has been briefly reviewed. It can be concluded that acoustics study has been developed along with the same atream of the historical developments of science and technology, the category of acoustics has changed from the nature-oriented and passive physical acoustics to the human-oriented and active information acoustics. It has been extended over a variety of wide fields. 展开更多
关键词 turning to information acoustics The course of science and technology and acoustics
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A principal consideration on general Bayes'filters for a state estimation of environmental sound and vibration systems
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作者 m.ohta E.UCHINO 《Chinese Journal of Acoustics》 1992年第2期105-123,共19页
This paper describes a fundamental consideration on our works on the design of general Bayes' filters for the state estimation of non-stationary, non-linear, and non-Gaussian environmental sound and vibration syst... This paper describes a fundamental consideration on our works on the design of general Bayes' filters for the state estimation of non-stationary, non-linear, and non-Gaussian environmental sound and vibration systems. We have discussed an essential point of several Bayes' filters proposed by using the orthogonal or non-orthogonal expansion form of Bayes' theorem. They can estimate any kinds of statistics of arbitrary function type of state variables including the lower and the higher order statistics connected with the Lx evaluation index in the environmental sound and vibration systems. Here, we have mainly focussed on giving the fundamental viewpoints of their design policies. Some new estimation methods and new results not yet published are included. 展开更多
关键词 A principal consideration on general Bayes’filters for a state estimation of environmental sound and vibration systems
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