A modular flat-screen liquid crystal television display is described.The picture elements of the modules may be emissive,reflective or transmissive.The flat-screen liquid crystal television also comprised of an electr...A modular flat-screen liquid crystal television display is described.The picture elements of the modules may be emissive,reflective or transmissive.The flat-screen liquid crystal television also comprised of an electrical control circuit capable of categorizing incoming television picture signals corresponding to the modules in the array and directing the electrical signals to the drive circuits of each module according to the portion of the television picture to be reproduced by the picture elements of that module.The picture elements are preferably formed in a light modulating film composed of a liquid crystal dispersion in a polymeric binder.A color display was also produced by placing a patterned red-green-blue filter adjacent the active matrix so that each picture element could also be coordinated with the color components of a color video signal.展开更多
The sources of large and unique platinum-metal placers were the zonal alkali-ultrabasic massifs be- coming active in the Cretaceous time that gravitated to the periphery of the areal of the North-Asian Superplume （NA...The sources of large and unique platinum-metal placers were the zonal alkali-ultrabasic massifs be- coming active in the Cretaceous time that gravitated to the periphery of the areal of the North-Asian Superplume （NAS） influence. Origin of the conditions favorable for the formation of the placer platinum presence in the re- gion is governed by the plume ore-generating magmatism of several generations （ in Proterozoie and Phanerozo- ic）. Ultramafite-mafite magmatism was responsible for the origin of the stratified zonal massifs subjected in the Late Paleozoic and Mesozoic to the action of granitogene derivations of the NAS. The latter provided the devel- opment of the ore-forming magmagene-fluid-metasomatic processes and favorable conditions for the platinum group elements concentration.展开更多
空战态势显示系统可以实时反映战场环境、体现作战元素行为、表现战斗综合形势,是现代空战模拟训练的重要组成部分。现有战斗态势显示系统用于空战态势显示在专业性和直观性面仍有诸多不足。本文在深入研究OSG(Open Scene Graph)平台基...空战态势显示系统可以实时反映战场环境、体现作战元素行为、表现战斗综合形势,是现代空战模拟训练的重要组成部分。现有战斗态势显示系统用于空战态势显示在专业性和直观性面仍有诸多不足。本文在深入研究OSG(Open Scene Graph)平台基础上,构建了一种空战态势显示系统框架,并对系统显示元素进行了分析与设计。系统能够动态直观地反映战场当前态势,可为空战评估和空战决策提供有力支持。展开更多
In hot deformation, the flow stress curves of steels always present as two typical types: at relatively high temperature and low strain rate, the flow stress may first increase and then attain a steady value without r...In hot deformation, the flow stress curves of steels always present as two typical types: at relatively high temperature and low strain rate, the flow stress may first increase and then attain a steady value without reaching an obvious peak stress; in other situations, the flow stress decreases after reaching peak stress and then attains a steady value. A new phenomenological model,described by a sine-function equation, is proposed to define the relationship between flow stress and deformation parameters. A series of isothermal compressions for a carbon steel were carried out, as a case study, to obtain basic experimental data.Parameters of the new model were sequentially determined. The predicted results of the proposed model were compared with actual measured data. Good accuracy was found in the standard statistical parameters of correlation coefficient, root mean square error, and average absolute relative error with the values of 0.935, 7.137 MPa and 4.352%, respectively. Discussion of applications of different models in finite-element simulation demonstrated the benefit of the new model. When comparing the simulation results of three different deformation patterns with large strain, the new model showed 10%–20% lower predicted forming load than the original Arrhenius equation, and better applicability and reliability than modified Arrhenius equations.展开更多
文摘A modular flat-screen liquid crystal television display is described.The picture elements of the modules may be emissive,reflective or transmissive.The flat-screen liquid crystal television also comprised of an electrical control circuit capable of categorizing incoming television picture signals corresponding to the modules in the array and directing the electrical signals to the drive circuits of each module according to the portion of the television picture to be reproduced by the picture elements of that module.The picture elements are preferably formed in a light modulating film composed of a liquid crystal dispersion in a polymeric binder.A color display was also produced by placing a patterned red-green-blue filter adjacent the active matrix so that each picture element could also be coordinated with the color components of a color video signal.
文摘The sources of large and unique platinum-metal placers were the zonal alkali-ultrabasic massifs be- coming active in the Cretaceous time that gravitated to the periphery of the areal of the North-Asian Superplume （NAS） influence. Origin of the conditions favorable for the formation of the placer platinum presence in the re- gion is governed by the plume ore-generating magmatism of several generations （ in Proterozoie and Phanerozo- ic）. Ultramafite-mafite magmatism was responsible for the origin of the stratified zonal massifs subjected in the Late Paleozoic and Mesozoic to the action of granitogene derivations of the NAS. The latter provided the devel- opment of the ore-forming magmagene-fluid-metasomatic processes and favorable conditions for the platinum group elements concentration.
文摘空战态势显示系统可以实时反映战场环境、体现作战元素行为、表现战斗综合形势,是现代空战模拟训练的重要组成部分。现有战斗态势显示系统用于空战态势显示在专业性和直观性面仍有诸多不足。本文在深入研究OSG(Open Scene Graph)平台基础上,构建了一种空战态势显示系统框架,并对系统显示元素进行了分析与设计。系统能够动态直观地反映战场当前态势,可为空战评估和空战决策提供有力支持。
基金supported by the National Natural Science Foundation of China(Grant No.51475294)
文摘In hot deformation, the flow stress curves of steels always present as two typical types: at relatively high temperature and low strain rate, the flow stress may first increase and then attain a steady value without reaching an obvious peak stress; in other situations, the flow stress decreases after reaching peak stress and then attains a steady value. A new phenomenological model,described by a sine-function equation, is proposed to define the relationship between flow stress and deformation parameters. A series of isothermal compressions for a carbon steel were carried out, as a case study, to obtain basic experimental data.Parameters of the new model were sequentially determined. The predicted results of the proposed model were compared with actual measured data. Good accuracy was found in the standard statistical parameters of correlation coefficient, root mean square error, and average absolute relative error with the values of 0.935, 7.137 MPa and 4.352%, respectively. Discussion of applications of different models in finite-element simulation demonstrated the benefit of the new model. When comparing the simulation results of three different deformation patterns with large strain, the new model showed 10%–20% lower predicted forming load than the original Arrhenius equation, and better applicability and reliability than modified Arrhenius equations.
