In this paper, the numerical simulation on the flow field of a four-channel coal burner was investigated with Fluent software. The three-dimension model was created with UG software. The structure was meshed by using ...In this paper, the numerical simulation on the flow field of a four-channel coal burner was investigated with Fluent software. The three-dimension model was created with UG software. The structure was meshed by using Gambit software. The realizable K-ε turbulence model and simple method were adopted. The variation of the inner flow field of the burner was studied and analyzed. The results simulated to the burner by the realizable K-ε turbulence model show that the contours of theflowfield accord with the actual condition and the realizable K-ε model is proved to be feasible and the results of simulation are creditable. That will have important significance to the improvement of the structure and parameter optimization of the four-channel coal burner in the future.展开更多
In this paper, we design and characterize a novel small size four-channel biosensor based on the two-dimensional photonic crystal with introducing waveguides and nano-cavities in the hexagonal lattice of air pores in ...In this paper, we design and characterize a novel small size four-channel biosensor based on the two-dimensional photonic crystal with introducing waveguides and nano-cavities in the hexagonal lattice of air pores in the silicon slab. By removing a group of air pores, waveguides are achieved, and nano-cavities are shaped by modifying the radius of air pores. Highly parallel operation of this biosensor due to the special architecture is the capability of the designed structure. The biomaterials which are suspended in a liquid medium inside nano-cavities cause effective refractive index changes which lead to the resonant wavelength shift in the output terminal. According to results, with increasing the refractive index of nano-cavities, resonant wavelengths shifts to longer values. For biochemical sensing like DNA molecule and protein and for the refractive index detection, this novel designed biosensor can be utilized.展开更多
为了适应机载射频前端小型化的需求,设计了一种基于SiP(System in Package)技术的K频段四通道天线接口单元。该单元采用二次超外差变频构架,主要由两个硅基封装的变频双通道集成SiP模块以及高低本振集成锁相环SiP模块组成。硅基变频SiP...为了适应机载射频前端小型化的需求,设计了一种基于SiP(System in Package)技术的K频段四通道天线接口单元。该单元采用二次超外差变频构架,主要由两个硅基封装的变频双通道集成SiP模块以及高低本振集成锁相环SiP模块组成。硅基变频SiP模块采用PoP(Package on Package)方式实现不同功能电路封装的上下堆叠,保证了良好的电磁兼容和输出杂散抑制。堆叠好的硅基封装通过BGA植入陶瓷封装中,实现了高可靠的气密性。基于SiP技术的四通道天线接口单元体积仅为58.2 mm×40.3 mm×11.0 mm,在保持优良电性能指标前提下,相比于传统方式设计,四通道天线接口单元在体积和质量上均大幅缩减86%以上,在机载、弹载等对设备轻小型化要求较高的平台上具有广阔的应用前景。展开更多
低分辨率激光图像重构存在色彩视觉效果不佳,结构相似度指数低等问题,因此,设计基于色彩视觉传达的低分辨率激光图像重建方法。引入色彩视觉传达技术,填充图像色彩。采用ANC滤波将幅度作为置信度,结合双边滤波器和幅度值域核函数,设计...低分辨率激光图像重构存在色彩视觉效果不佳,结构相似度指数低等问题,因此,设计基于色彩视觉传达的低分辨率激光图像重建方法。引入色彩视觉传达技术,填充图像色彩。采用ANC滤波将幅度作为置信度,结合双边滤波器和幅度值域核函数,设计自适应双边归一化卷积法,滤波处理图像。采用四通道卷积稀疏编码,重建低分辨率激光图像。结果表明,该方法重建图像的色彩视觉传达效果最佳,饱和度为97.2%,亮度、色相、色彩对比度和锐度分别提高7.0%、20°、3.0和0.05 Line Pairs/MM,并且视区平滑性到达0.96,结构相似度指数为0.97,该方法具备了更好的激光图像重建效果。展开更多
文摘In this paper, the numerical simulation on the flow field of a four-channel coal burner was investigated with Fluent software. The three-dimension model was created with UG software. The structure was meshed by using Gambit software. The realizable K-ε turbulence model and simple method were adopted. The variation of the inner flow field of the burner was studied and analyzed. The results simulated to the burner by the realizable K-ε turbulence model show that the contours of theflowfield accord with the actual condition and the realizable K-ε model is proved to be feasible and the results of simulation are creditable. That will have important significance to the improvement of the structure and parameter optimization of the four-channel coal burner in the future.
文摘In this paper, we design and characterize a novel small size four-channel biosensor based on the two-dimensional photonic crystal with introducing waveguides and nano-cavities in the hexagonal lattice of air pores in the silicon slab. By removing a group of air pores, waveguides are achieved, and nano-cavities are shaped by modifying the radius of air pores. Highly parallel operation of this biosensor due to the special architecture is the capability of the designed structure. The biomaterials which are suspended in a liquid medium inside nano-cavities cause effective refractive index changes which lead to the resonant wavelength shift in the output terminal. According to results, with increasing the refractive index of nano-cavities, resonant wavelengths shifts to longer values. For biochemical sensing like DNA molecule and protein and for the refractive index detection, this novel designed biosensor can be utilized.
文摘为了适应机载射频前端小型化的需求,设计了一种基于SiP(System in Package)技术的K频段四通道天线接口单元。该单元采用二次超外差变频构架,主要由两个硅基封装的变频双通道集成SiP模块以及高低本振集成锁相环SiP模块组成。硅基变频SiP模块采用PoP(Package on Package)方式实现不同功能电路封装的上下堆叠,保证了良好的电磁兼容和输出杂散抑制。堆叠好的硅基封装通过BGA植入陶瓷封装中,实现了高可靠的气密性。基于SiP技术的四通道天线接口单元体积仅为58.2 mm×40.3 mm×11.0 mm,在保持优良电性能指标前提下,相比于传统方式设计,四通道天线接口单元在体积和质量上均大幅缩减86%以上,在机载、弹载等对设备轻小型化要求较高的平台上具有广阔的应用前景。
文摘低分辨率激光图像重构存在色彩视觉效果不佳,结构相似度指数低等问题,因此,设计基于色彩视觉传达的低分辨率激光图像重建方法。引入色彩视觉传达技术,填充图像色彩。采用ANC滤波将幅度作为置信度,结合双边滤波器和幅度值域核函数,设计自适应双边归一化卷积法,滤波处理图像。采用四通道卷积稀疏编码,重建低分辨率激光图像。结果表明,该方法重建图像的色彩视觉传达效果最佳,饱和度为97.2%,亮度、色相、色彩对比度和锐度分别提高7.0%、20°、3.0和0.05 Line Pairs/MM,并且视区平滑性到达0.96,结构相似度指数为0.97,该方法具备了更好的激光图像重建效果。
