This paper proposes a new method to diagnose the system fault of the process industry based on the monitor data set of distributed control system(DCS). Firstly, it defines a homeomorphism product space named color pha...This paper proposes a new method to diagnose the system fault of the process industry based on the monitor data set of distributed control system(DCS). Firstly, it defines a homeomorphism product space named color phase space which is a Cartesian product of two-dimensional Euclidean space and three-dimensional color phase space. Secondly, it maps the DCS data to the color phase space in order to get a system color-spectrum which displays the inherent relationship of the whole system. Then, it diagnoses the system fault by observing the color change on the color-spectrum depending on the physiological characteristics that human's eyes are more sensitive for the color change than data change.展开更多
Common displays such as CRT or LCD screens have limited capabilities in displaying most color spectra correctly. The main disadvantage of these devices is that they work with three primaries and the colors displayed a...Common displays such as CRT or LCD screens have limited capabilities in displaying most color spectra correctly. The main disadvantage of these devices is that they work with three primaries and the colors displayed are the mixture of these three colours. Consequently these devices can be confusing in testing human color identification, because the spectral distribution of the colors displayed is the combined spectrum of the three primaries. We have developed a new instrument for spectrally correct color vision measurement. This instrument uses light emitting diodes (LEDs) and is capable of producing all spectra of perceivable colors, thus with appropriate test methods this instrument can be a reliable and useful tool in test~ing human color vision and in verifying color vision correction.展开更多
The composition design and melting technique of colored glasses based on wollastonite was studied. The density, expansion coefficient, thermostability, durability and some optical properties of glasses were measured. ...The composition design and melting technique of colored glasses based on wollastonite was studied. The density, expansion coefficient, thermostability, durability and some optical properties of glasses were measured. The results show: These glasses have low melting temperature and short clarifying time. Their physicochemical properties were improved res- pectively to a certain degree.展开更多
Purpose:To study the Color Doppler Image(CDI)characteristics of choroidal detachment and the applied valus of CDI.Methods:Seventy-two cases(74eyes)of choroidal edtachment were studied retrospectively.Results:The typic...Purpose:To study the Color Doppler Image(CDI)characteristics of choroidal detachment and the applied valus of CDI.Methods:Seventy-two cases(74eyes)of choroidal edtachment were studied retrospectively.Results:The typical ultragraph of chororidal detachment displayed one or several smooth hemispherical or lobuler circular thick bands,with convex side toward vitreous cavity,Most of the choroidal detachments were located before the equator,a few of them were beyond the equator.CDI displayed blood flow singnal in the band.Pulse Doppler showed the frequency spectrum features of retinal detachment band were similar to those of central retinal vessels,whereas the frequency spectum features of choroidal detachment bend resembled those of ciliary artery in some cases of retinal detachment(RD)accompanied by choroidal detachment.Conclusion:CDI could make a correct and precise diagnosis of choroidal detachment.Eye Science2000;16:61-64.展开更多
基金the National Natural Science Foundation of China(No.51375375)
文摘This paper proposes a new method to diagnose the system fault of the process industry based on the monitor data set of distributed control system(DCS). Firstly, it defines a homeomorphism product space named color phase space which is a Cartesian product of two-dimensional Euclidean space and three-dimensional color phase space. Secondly, it maps the DCS data to the color phase space in order to get a system color-spectrum which displays the inherent relationship of the whole system. Then, it diagnoses the system fault by observing the color change on the color-spectrum depending on the physiological characteristics that human's eyes are more sensitive for the color change than data change.
文摘Common displays such as CRT or LCD screens have limited capabilities in displaying most color spectra correctly. The main disadvantage of these devices is that they work with three primaries and the colors displayed are the mixture of these three colours. Consequently these devices can be confusing in testing human color identification, because the spectral distribution of the colors displayed is the combined spectrum of the three primaries. We have developed a new instrument for spectrally correct color vision measurement. This instrument uses light emitting diodes (LEDs) and is capable of producing all spectra of perceivable colors, thus with appropriate test methods this instrument can be a reliable and useful tool in test~ing human color vision and in verifying color vision correction.
文摘The composition design and melting technique of colored glasses based on wollastonite was studied. The density, expansion coefficient, thermostability, durability and some optical properties of glasses were measured. The results show: These glasses have low melting temperature and short clarifying time. Their physicochemical properties were improved res- pectively to a certain degree.
文摘Purpose:To study the Color Doppler Image(CDI)characteristics of choroidal detachment and the applied valus of CDI.Methods:Seventy-two cases(74eyes)of choroidal edtachment were studied retrospectively.Results:The typical ultragraph of chororidal detachment displayed one or several smooth hemispherical or lobuler circular thick bands,with convex side toward vitreous cavity,Most of the choroidal detachments were located before the equator,a few of them were beyond the equator.CDI displayed blood flow singnal in the band.Pulse Doppler showed the frequency spectrum features of retinal detachment band were similar to those of central retinal vessels,whereas the frequency spectum features of choroidal detachment bend resembled those of ciliary artery in some cases of retinal detachment(RD)accompanied by choroidal detachment.Conclusion:CDI could make a correct and precise diagnosis of choroidal detachment.Eye Science2000;16:61-64.
