The hardware optimization technique of mono similarity system generation is presented based on hardware/software(HW/SW) co design.First,the coarse structure of sub graphs' matching based on full customized HW...The hardware optimization technique of mono similarity system generation is presented based on hardware/software(HW/SW) co design.First,the coarse structure of sub graphs' matching based on full customized HW/SW co design is put forward.Then,a universal sub graphs' combination method is discussed.Next,a more advanced vertexes' compression algorithm based on sub graphs' combination method is discussed with great emphasis.Experiments are done successfully with perfect results verifying all the formulas and the methods above.展开更多
The inner flow field of a biogas plant can be optimized by agitating the feedstock to be evenly distributed for a rising biogas production rate. A hydraulic agitator can be installed in the digester with outlets far a...The inner flow field of a biogas plant can be optimized by agitating the feedstock to be evenly distributed for a rising biogas production rate. A hydraulic agitator can be installed in the digester with outlets far above the bottom. Hydraulic mixing is essential in a solid-liquid two-phase flow process, in which large solid particles can be found at the initial stage and turn to being high-concentration viscous liquid （non-Newtonian fluid）. A 0.75 m3 digester was taken as a case study with CFD （computational fluid dynamics） software. The basic pattern was simulated by using water as the medium and the pattern of pseudo plastic fluid state was simulated by the Euler-Euler Model, then the effect of optimized design with bottom inflow and high dispersed outlets could be verified. Viewed from the mixing effects, the velocity of 0.6 m/s is better than l m/s for water medium, while 1 m/s better than 0.6 m/s for pseudo plastic fluid medium.展开更多
Although Alternate Parallel Receiver (APRX) could effectively improve the maximum demodulating rate of the receiver, its frequency domain processing module consumes a large amount of multiplication units when the numb...Although Alternate Parallel Receiver (APRX) could effectively improve the maximum demodulating rate of the receiver, its frequency domain processing module consumes a large amount of multiplication units when the number of parallel input channels is large, making it unsuitable for use on FPGA software defi ned radio platforms. This paper proposes an optimization scheme by introducing partitioned convolution and exploring the spectrum characteristic of the APRX input data, reducing the usage of multipliers greatly. After the optimization, the number of real multipliers used in the frequency-domain processing module of the 16-ary APRX is reduced from about 576 to 68, with little performance loss. This optimized APRX is fairly suitable for FPGA software defi ned radio platform applications.展开更多
Research and development within the windsurfing field is comprised purely of previous experience, prototype building and testing on the water. The use of Computer Aided Design （CAD） systems and simulation packages c...Research and development within the windsurfing field is comprised purely of previous experience, prototype building and testing on the water. The use of Computer Aided Design （CAD） systems and simulation packages can significantly help in the design and testing phases by optimizing the design before a prototype is built. In the paper, supported by these software tools, the authors show a new patented system, named iDO, developed with the aim to stabilize the windsurf, to allow reducing the initial difficulties that a beginner meets in the learning phase. The design process, from the idea to the manufacturing aspects, with all the technical and technological problems, is described. The validation product was carried out by means of user evaluation questionnaires from sixty-four windsurfing beginners in several countries over world. The results show that the users are significantly satisfied with the product.展开更多
文摘The hardware optimization technique of mono similarity system generation is presented based on hardware/software(HW/SW) co design.First,the coarse structure of sub graphs' matching based on full customized HW/SW co design is put forward.Then,a universal sub graphs' combination method is discussed.Next,a more advanced vertexes' compression algorithm based on sub graphs' combination method is discussed with great emphasis.Experiments are done successfully with perfect results verifying all the formulas and the methods above.
文摘The inner flow field of a biogas plant can be optimized by agitating the feedstock to be evenly distributed for a rising biogas production rate. A hydraulic agitator can be installed in the digester with outlets far above the bottom. Hydraulic mixing is essential in a solid-liquid two-phase flow process, in which large solid particles can be found at the initial stage and turn to being high-concentration viscous liquid （non-Newtonian fluid）. A 0.75 m3 digester was taken as a case study with CFD （computational fluid dynamics） software. The basic pattern was simulated by using water as the medium and the pattern of pseudo plastic fluid state was simulated by the Euler-Euler Model, then the effect of optimized design with bottom inflow and high dispersed outlets could be verified. Viewed from the mixing effects, the velocity of 0.6 m/s is better than l m/s for water medium, while 1 m/s better than 0.6 m/s for pseudo plastic fluid medium.
基金This work was supported by the National Basic research Program of China (2007CB310600)the National Natural Science Foundation of China under Grants No. 60532070 and No. 60525107
文摘Although Alternate Parallel Receiver (APRX) could effectively improve the maximum demodulating rate of the receiver, its frequency domain processing module consumes a large amount of multiplication units when the number of parallel input channels is large, making it unsuitable for use on FPGA software defi ned radio platforms. This paper proposes an optimization scheme by introducing partitioned convolution and exploring the spectrum characteristic of the APRX input data, reducing the usage of multipliers greatly. After the optimization, the number of real multipliers used in the frequency-domain processing module of the 16-ary APRX is reduced from about 576 to 68, with little performance loss. This optimized APRX is fairly suitable for FPGA software defi ned radio platform applications.
文摘Research and development within the windsurfing field is comprised purely of previous experience, prototype building and testing on the water. The use of Computer Aided Design （CAD） systems and simulation packages can significantly help in the design and testing phases by optimizing the design before a prototype is built. In the paper, supported by these software tools, the authors show a new patented system, named iDO, developed with the aim to stabilize the windsurf, to allow reducing the initial difficulties that a beginner meets in the learning phase. The design process, from the idea to the manufacturing aspects, with all the technical and technological problems, is described. The validation product was carried out by means of user evaluation questionnaires from sixty-four windsurfing beginners in several countries over world. The results show that the users are significantly satisfied with the product.
