The distribution of the light reflected from various fabric surfaces was studied. A series of samples of different fibers, weaves and colors were investigated. The experiments show that the goniophotometric curves of ...The distribution of the light reflected from various fabric surfaces was studied. A series of samples of different fibers, weaves and colors were investigated. The experiments show that the goniophotometric curves of fabrics change with constituent fibers, weave, dyeing and finishing, and experimental condition.The goniophotometric curves for fabrics of same kind with different colors are same in general shape, and the reflectance or the height of the curves are changed to the extent of that they are in proportion with the brightness or the tristimulus value Y of the samples. The goniophotometric curve also varies in form when the incident angle is changed. Discussion and explanation for the above mentioned are given. Luster of the samples was calculated with methods suggested by different indexing systems.展开更多
A rarely encountered sericite was investigated using X-ray diffraction,differential thermal analysis,and scanning electron microscopy.XRD analysis shows that the pattern of the sericite in the sample is similar to tha...A rarely encountered sericite was investigated using X-ray diffraction,differential thermal analysis,and scanning electron microscopy.XRD analysis shows that the pattern of the sericite in the sample is similar to that of illite.DTA (TG) analyses show that only a weak heat absorption reaction takes place at 566℃,which is contributed to the polymorphic transformation of quartz,and no change in mass was detected in the range from ambient temperature to 800℃.These reveal that no water escapes from the crystal structure of the clay mineral during heating and therefore indicated that the clay mineral is obviously sericite in species instead of illite.SEM observations show that the sericite particles are significantly small in size and growth steps and irregular structures develop on the crystal surfaces as well as the colored mineral inclusions,which might suggest some loss of optical properties of the sample and thus lead to the variance,with earthy luster of the aggregate,from typical sericite in optical characters.展开更多
The inheritance of seed color and seed luster of mungbean was studied by using accessions/varieties with different seed color,black (Bkck),green (KPS1) and green (KPS2).In KPS2×Bkck combination,the p2 seed color ...The inheritance of seed color and seed luster of mungbean was studied by using accessions/varieties with different seed color,black (Bkck),green (KPS1) and green (KPS2).In KPS2×Bkck combination,the p2 seed color was shiny black.The F3 data indicated the following genotype:3B-for black seed color,and 1 bb for green seed color.Plant purple petiole gene and black seed color gene were very close linkage.There was no segregation between them.Perhaps the same gene B controlled the color of purple petiole.Moreover in KPS1X Bkck combination F3 seed color popuktion showed a wide rang of phenotypic variability.Perhaps seed luster was controlled by more than two genes.展开更多
The cluster synchronization problem of complex dynamical networks with each node being a Lurie system with exter- nal disturbances and time-varying delay is investigated in this paper. Some criteria for cluster synchr...The cluster synchronization problem of complex dynamical networks with each node being a Lurie system with exter- nal disturbances and time-varying delay is investigated in this paper. Some criteria for cluster synchronization with desired H∞ performance are presented by using a local linear control scheme. Firstly, sufficient conditions are established to realize cluster synchronization of the Lurie dynamical networks without time delay. Then, the notion of the cluster synchronized region is introduced, and some conditions guaranteeing the cluster synchronized region and unbounded cluster synchro- nized region are derived. Furthermore, the cluster synchronization and cluster synchronized region in the Lurie dynamical networks with time-varying delay are considered. Numerical examples are finally provided to verify and illustrate the theoretical results.展开更多
This paper reports the research achievement and the preparation technology of the new type composite mica pearly luster pigment, analyses its properties and peculiarities, quality and the influencing factors on them, ...This paper reports the research achievement and the preparation technology of the new type composite mica pearly luster pigment, analyses its properties and peculiarities, quality and the influencing factors on them, and meantime points out its application prospect.展开更多
A new surface strengthening technology, luster polish strengthening treatment, was proposed to treat the raceway surface of aeroengine bearings （9Cr18Mo） with the centrifugal strengthening machine exclusively design...A new surface strengthening technology, luster polish strengthening treatment, was proposed to treat the raceway surface of aeroengine bearings （9Cr18Mo） with the centrifugal strengthening machine exclusively designed for luster polish strengthening treatment. The experimental results showed that luster polish strengthening treatment produced a compressive residual stress layer with a depth of over 80 μm below the surface of the bearing raceway, and thus effectively removed the metamorphic layer in the raceway surface. After luster polish strengthening treatment, the average surface hardness of the aeroengine bearing raceway was increased from 61.02 HRC to 63.01 HRC, the surface roughness was reduced from 0.06 μm to 0.03 μm, and the contact fatigue life of the aeroengine bearings was improved by about 90%, with the dispersion of fatigue life being reduced remarkably. Theoretical calculation result agrees with that obtained by experiment.展开更多
A statistical analysis of the twinning behavior in a basal-textured Mg sheet under hard orientation loading was performed at strain rates of 1×10^(-5) and 1×10^(-1) s^(-1) with grain sizes of 70 and 20µ...A statistical analysis of the twinning behavior in a basal-textured Mg sheet under hard orientation loading was performed at strain rates of 1×10^(-5) and 1×10^(-1) s^(-1) with grain sizes of 70 and 20µm.There were 1609 tension twins identified including adequate(51%)anomalous twins(Schmid factor m<0).Twin variant selection exhibited almost no grain size or strain rate effects.Most twin variants(74%)correlated well with the proposed normalized Schmid factor(mnor).The Luster-Morris parameter(m′)values failed to correlate with the twin transmission,while 96%of transmitted pairs exhibited large mnor or normalized m′(m′nor)values.Twin transmission occurred more frequently at lower grain boundary misorientation angles(10°-30°).The active anomalous twins correlated well with m of the prismatic slip.The present work provided a statistical perspective that,the mnor and m′nor can correlate the anomalous twinning rather than m and m′.The local condition also played a critical role in anomalous twinning behavior.展开更多
文摘The distribution of the light reflected from various fabric surfaces was studied. A series of samples of different fibers, weaves and colors were investigated. The experiments show that the goniophotometric curves of fabrics change with constituent fibers, weave, dyeing and finishing, and experimental condition.The goniophotometric curves for fabrics of same kind with different colors are same in general shape, and the reflectance or the height of the curves are changed to the extent of that they are in proportion with the brightness or the tristimulus value Y of the samples. The goniophotometric curve also varies in form when the incident angle is changed. Discussion and explanation for the above mentioned are given. Luster of the samples was calculated with methods suggested by different indexing systems.
文摘A rarely encountered sericite was investigated using X-ray diffraction,differential thermal analysis,and scanning electron microscopy.XRD analysis shows that the pattern of the sericite in the sample is similar to that of illite.DTA (TG) analyses show that only a weak heat absorption reaction takes place at 566℃,which is contributed to the polymorphic transformation of quartz,and no change in mass was detected in the range from ambient temperature to 800℃.These reveal that no water escapes from the crystal structure of the clay mineral during heating and therefore indicated that the clay mineral is obviously sericite in species instead of illite.SEM observations show that the sericite particles are significantly small in size and growth steps and irregular structures develop on the crystal surfaces as well as the colored mineral inclusions,which might suggest some loss of optical properties of the sample and thus lead to the variance,with earthy luster of the aggregate,from typical sericite in optical characters.
文摘The inheritance of seed color and seed luster of mungbean was studied by using accessions/varieties with different seed color,black (Bkck),green (KPS1) and green (KPS2).In KPS2×Bkck combination,the p2 seed color was shiny black.The F3 data indicated the following genotype:3B-for black seed color,and 1 bb for green seed color.Plant purple petiole gene and black seed color gene were very close linkage.There was no segregation between them.Perhaps the same gene B controlled the color of purple petiole.Moreover in KPS1X Bkck combination F3 seed color popuktion showed a wide rang of phenotypic variability.Perhaps seed luster was controlled by more than two genes.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.61075065,60774045,and U1134108)the Talent Introduction Scientific Research Foundation of Northwest University for Nationalities(Grant No.xbmuyjrc201304)the Foundation for Young Talents of Gansu Province,China(Grant No.1208RJYA013)
文摘The cluster synchronization problem of complex dynamical networks with each node being a Lurie system with exter- nal disturbances and time-varying delay is investigated in this paper. Some criteria for cluster synchronization with desired H∞ performance are presented by using a local linear control scheme. Firstly, sufficient conditions are established to realize cluster synchronization of the Lurie dynamical networks without time delay. Then, the notion of the cluster synchronized region is introduced, and some conditions guaranteeing the cluster synchronized region and unbounded cluster synchro- nized region are derived. Furthermore, the cluster synchronization and cluster synchronized region in the Lurie dynamical networks with time-varying delay are considered. Numerical examples are finally provided to verify and illustrate the theoretical results.
文摘This paper reports the research achievement and the preparation technology of the new type composite mica pearly luster pigment, analyses its properties and peculiarities, quality and the influencing factors on them, and meantime points out its application prospect.
基金The National Key Project of China duringthe 10th Five-Year Plan Period (NoMKPT-01-004(ZD))
文摘A new surface strengthening technology, luster polish strengthening treatment, was proposed to treat the raceway surface of aeroengine bearings （9Cr18Mo） with the centrifugal strengthening machine exclusively designed for luster polish strengthening treatment. The experimental results showed that luster polish strengthening treatment produced a compressive residual stress layer with a depth of over 80 μm below the surface of the bearing raceway, and thus effectively removed the metamorphic layer in the raceway surface. After luster polish strengthening treatment, the average surface hardness of the aeroengine bearing raceway was increased from 61.02 HRC to 63.01 HRC, the surface roughness was reduced from 0.06 μm to 0.03 μm, and the contact fatigue life of the aeroengine bearings was improved by about 90%, with the dispersion of fatigue life being reduced remarkably. Theoretical calculation result agrees with that obtained by experiment.
基金supported by the National Natural Science Foundation of China(Nos.52171125,52071178)。
文摘A statistical analysis of the twinning behavior in a basal-textured Mg sheet under hard orientation loading was performed at strain rates of 1×10^(-5) and 1×10^(-1) s^(-1) with grain sizes of 70 and 20µm.There were 1609 tension twins identified including adequate(51%)anomalous twins(Schmid factor m<0).Twin variant selection exhibited almost no grain size or strain rate effects.Most twin variants(74%)correlated well with the proposed normalized Schmid factor(mnor).The Luster-Morris parameter(m′)values failed to correlate with the twin transmission,while 96%of transmitted pairs exhibited large mnor or normalized m′(m′nor)values.Twin transmission occurred more frequently at lower grain boundary misorientation angles(10°-30°).The active anomalous twins correlated well with m of the prismatic slip.The present work provided a statistical perspective that,the mnor and m′nor can correlate the anomalous twinning rather than m and m′.The local condition also played a critical role in anomalous twinning behavior.
