Microprocessor performance has improved rapidly these years. In contrast, memory latencies and bandwidths have improved little. The result is that the memory access time has been a bottleneck which limits the system p...
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ISBN:
(纸本)9780769542966
Microprocessor performance has improved rapidly these years. In contrast, memory latencies and bandwidths have improved little. The result is that the memory access time has been a bottleneck which limits the system performance. Memory controller (MC) is designed and built to attacking this problem. The memory controller is the part of the system that, well, controls the memory. The memory controller is normally integrated into the system chipset. This paper shows how to build an advanced Microcontroller Bus Architecture (AMBA) compliant MC as an advanced High-performance Bus (AHB) slave. The MC is designed for system memory control with the main memory consisting of SRAM and ROM. Additionally, the problems met in the design process are discussed and the solutions are given in the paper.
Color conversion method has been used to fabricate chromatic-stability white organic light-emitting diodes (OLEDs). Experimental results found little CIE coordinate migration while changing operation voltage from 5 V ...
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Depth maps are used for synthesis virtual view in free-viewpoint television （FTV） systems. When depth maps are derived using existing depth estimation methods, the depth distortions will cause undesirable artifacts ...
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Depth maps are used for synthesis virtual view in free-viewpoint television （FTV） systems. When depth maps are derived using existing depth estimation methods, the depth distortions will cause undesirable artifacts in the synthesized views. To solve this problem, a 3D video quality model base depth maps （D-3DV） for virtual view synthesis and depth map coding in the FTV applications is proposed. First, the relationships between distortions in coded depth map and rendered view are derived. Then, a precisely 3DV quality model based depth characteristics is develop for the synthesized virtual views. Finally, based on D-3DV model, a multilateral filtering is applied as a pre-processed filter to reduce rendering artifacts. The experimental results evaluated by objective and subjective methods indicate that the proposed D-3DV model can reduce bit-rate of depth coding and achieve better rendering quality.
Isotropic conductive adhesives (ICAs) with stable contact resistance and high thermal conductivity are highly desirable. In this paper, a new ICA filled with silver fillers and singlewall carbon nanotubes (SCNTs) was ...
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Isotropic conductive adhesives (ICAs) with stable contact resistance and high thermal conductivity are highly desirable. In this paper, a new ICA filled with silver fillers and singlewall carbon nanotubes (SCNTs) was developed. SCNTs were acidified in a mixture of 98% H2SO4 and 68% HNO3 with a volume rate of 3:1 at 50 0C for 3 h. Carboxyl and hydroxyl groups were produced on SCNTs, and the purity of SCNTs also greatly improved. To prepare the ICAs, acidified SCNTs were firstly ultrasonically dispersed in acetone, then added into the matrix resin, and finally mixed with silver fillers. The bulk resistivity of the fabricated ICAs filled with silver fillers and acidified SCNTs was larger, their lap shear strength lower, their contact resistance stability improved, and their moisture absorption remained almost unchanged. In the curing process, the released heat was greatly reduced and transferred to the surroundings for good thermal conductivity of SCNTs, but the curing temperature was not affected. Therefore, acidified SCNTs can be used in ICAs, and in general, will create a good effect on ICAs.
It is very important to analyze and synthesize sports video sequences efficiently for improving competition. Aiming at some limits existing in literature with complex computation and low efficiency in analysis sport v...
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Due to complexity, multiplicity and randomness of table tennis matches, it is necessary to develop some skill and tactic diagnostic models especially an efficient scoring model to get some skill and tactics data for t...
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Indium-Tin-Oxide (ITO) film prepared by DC magnetron sputtering was used as a current spread layer for LEDs. After the annealing treatment, the physical prosperities of p-GaN based LED have been investigated. The N2 a...
Indium-Tin-Oxide (ITO) film prepared by DC magnetron sputtering was used as a current spread layer for LEDs. After the annealing treatment, the physical prosperities of p-GaN based LED have been investigated. The N2 annealing improved the surface roughness of ITO film to reach the smallest value (8 nm RMS) and exhibited an ohmic contact for ITO/p-GaN interface with the forward voltage decreasing. In comparison with electron beam evaporation, the ITO film prepared by DC magnetron sputtering had better optical and electronic prosperities after the annealing treatment.
Fluid dispensing was one of the main packaging technologies in the electronics industry. This study developed a control system for the adhesive jetting machine to match the no-contact requirement with high frequency a...
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Fluid dispensing was one of the main packaging technologies in the electronics industry. This study developed a control system for the adhesive jetting machine to match the no-contact requirement with high frequency and *** main control body was the computer and the control objects were the motion platform, jetting dispenser and temperature controller. The system had two control levels: the top level for the body and the bottom level for the objects. The developed software applied a hybrid programming based on Lab VIEW and Motion Assist 2.0 to provide a better operation performance and friendly interface. The prototype machine could achieve the programmed tasks after the mechanical structure and control system fabrication and the developed software installation.
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