This paper addresses the issue of designing the detailed architectures of Field-Programmable Gate Arrays(FPGAs), which has a great impact on the overall performances of an FPGA in practice. Firstly, a novel FPGA archi...This paper addresses the issue of designing the detailed architectures of Field-Programmable Gate Arrays(FPGAs), which has a great impact on the overall performances of an FPGA in practice. Firstly, a novel FPGA architecture description model is proposed based on an easy-to-use file format known as YAML. This format permits the description of any detailed architecture of hard blocks and channels. Then a general algorithm of building FPGA resource graph is presented. The proposed model is scalable and capable of dealing with detailed architecture design and can be used in FPGA architecture evaluation system which is developed to enable detailed architecture design. Experimental results show that a maximum of 16.36% reduction in total wirelength and a maximum of 9.34% reduction in router effort can be obtained by making very little changes to detailed architectures, which verifies the necessity and effectiveness of the proposed model.展开更多
In recent years,as a new growth point of China's economic development,small towns are under construction in full swing[1].But with the rapid expansion,many problems that the city scholars and builders think about ...In recent years,as a new growth point of China's economic development,small towns are under construction in full swing[1].But with the rapid expansion,many problems that the city scholars and builders think about have emerged.The problems in the construction of small towns are mainly reflected in the over development of capital,insufficient understanding on culture,deviation of construction strategies,etc.In many small towns,there is an imbalance between the volume and color of buildings,the architectural form is single[2],and the expression of local culture is insufficient.From the perspectives of nature and culture,the architecture of Ciping Town,a mountainous town,is evaluated.In view of the problems found,this paper puts forward its thinking on the buildings in this type of small towns,so as to provide some reference for the development of architecture in this type of small towns.展开更多
Efficiency of the autofocusing algorithm implementations based on various orthogonal transforms is examined. The algorithm uses the variance of an image acquired by a sensor as a focus function. To compute the estimat...Efficiency of the autofocusing algorithm implementations based on various orthogonal transforms is examined. The algorithm uses the variance of an image acquired by a sensor as a focus function. To compute the estimate of the variance we exploit the equivalence between that estimate and the image orthogonal expansion. Energy consumption of three implementations exploiting either of the following fast orthogonal transforms: the discrete cosine, the Walsh-Hadamard, and the Haar wavelet one, is evaluated and compared. Furthermore, it is conjectured that the computation precision can considerably be reduced if the image is heavily corrupted by the noise, and a simple problem of optimal word bit-length selection with respect to the signal variance is analyzed.展开更多
基金Supported by National High Technology Research and Develop Program of China(No.2012AA012301)National Science and Technology Major Project of China(No.2013ZX03006004)
文摘This paper addresses the issue of designing the detailed architectures of Field-Programmable Gate Arrays(FPGAs), which has a great impact on the overall performances of an FPGA in practice. Firstly, a novel FPGA architecture description model is proposed based on an easy-to-use file format known as YAML. This format permits the description of any detailed architecture of hard blocks and channels. Then a general algorithm of building FPGA resource graph is presented. The proposed model is scalable and capable of dealing with detailed architecture design and can be used in FPGA architecture evaluation system which is developed to enable detailed architecture design. Experimental results show that a maximum of 16.36% reduction in total wirelength and a maximum of 9.34% reduction in router effort can be obtained by making very little changes to detailed architectures, which verifies the necessity and effectiveness of the proposed model.
文摘In recent years,as a new growth point of China's economic development,small towns are under construction in full swing[1].But with the rapid expansion,many problems that the city scholars and builders think about have emerged.The problems in the construction of small towns are mainly reflected in the over development of capital,insufficient understanding on culture,deviation of construction strategies,etc.In many small towns,there is an imbalance between the volume and color of buildings,the architectural form is single[2],and the expression of local culture is insufficient.From the perspectives of nature and culture,the architecture of Ciping Town,a mountainous town,is evaluated.In view of the problems found,this paper puts forward its thinking on the buildings in this type of small towns,so as to provide some reference for the development of architecture in this type of small towns.
基金supported by the NCN grant UMO-2011/01/B/ST7/00666.
文摘Efficiency of the autofocusing algorithm implementations based on various orthogonal transforms is examined. The algorithm uses the variance of an image acquired by a sensor as a focus function. To compute the estimate of the variance we exploit the equivalence between that estimate and the image orthogonal expansion. Energy consumption of three implementations exploiting either of the following fast orthogonal transforms: the discrete cosine, the Walsh-Hadamard, and the Haar wavelet one, is evaluated and compared. Furthermore, it is conjectured that the computation precision can considerably be reduced if the image is heavily corrupted by the noise, and a simple problem of optimal word bit-length selection with respect to the signal variance is analyzed.
