Guest Editor in Chief:Professor Xiao-Ping Zhang, University of Birmingham The potential for renewable energy to make contributions to mitigating the impact of climate change is expected to increase significantly in th...Guest Editor in Chief:Professor Xiao-Ping Zhang, University of Birmingham The potential for renewable energy to make contributions to mitigating the impact of climate change is expected to increase significantly in the longer term. Renewable energy generation technologies including onshore wind, offshore wind, wave,tidal, marine current, and ocean thermal energy generation as well as PV power generation, which are considered展开更多
Utilization of wind energy is a promising way to generate power,and wind turbine blades play a key role in collecting the wind energy effectively.This paper attempts to measure the deformation parameter of wind turbin...Utilization of wind energy is a promising way to generate power,and wind turbine blades play a key role in collecting the wind energy effectively.This paper attempts to measure the deformation parameter of wind turbine blades in mechanics experiments using a videometric method. In view that the blades experience small buckling deformation and large integral deformation simultaneously, we proposed a parallel network measurement(PNM) method including the key techniques such as camera network construction,camera calibration,distortion correction,the semi-automatic high-precision extraction of targets,coordinate systems unification,and bundle adjustment,etc. The relatively convenient construction method of the measuring system can provide an abundant measuring content,a wide measuring range and post processing.The experimental results show that the accuracy of the integral deformation measurement is higher than 0.5 mm and that of the buckling deformation measurement higher than 0.1mm.展开更多
At the background of urban and rural integration,this paper analyzed and discussed factors restricting large-scale farmland operation in China's hilly areas from the qualitative perspective. It recognized large-sc...At the background of urban and rural integration,this paper analyzed and discussed factors restricting large-scale farmland operation in China's hilly areas from the qualitative perspective. It recognized large-scale farmland operation on the basis of the long tail theory. Finally,it came up with recommendations for developing large-scale farmland operation in hilly areas.展开更多
为提高Exp-Golomb码的编解码效率,提出了一种基于快速"首位1检测"的Exp-Golomb编解码器硬件实现方法,降低了计算量并节省了硬件资源。该Exp-Golomb编解码器已通过RTL(Register Transfer Level)级仿真和综合,并在FPGA(Field Pr...为提高Exp-Golomb码的编解码效率,提出了一种基于快速"首位1检测"的Exp-Golomb编解码器硬件实现方法,降低了计算量并节省了硬件资源。该Exp-Golomb编解码器已通过RTL(Register Transfer Level)级仿真和综合,并在FPGA(Field Programmable Gate Array)开发平台进行了验证,在133 MHz时钟频率下编解码器的综合门数分别为765门和632门。该编解码器能满足Baseline档次(30帧/s),分辨率为352×288视频序列的实时编解码对质量和速度的要求。展开更多
文摘Guest Editor in Chief:Professor Xiao-Ping Zhang, University of Birmingham The potential for renewable energy to make contributions to mitigating the impact of climate change is expected to increase significantly in the longer term. Renewable energy generation technologies including onshore wind, offshore wind, wave,tidal, marine current, and ocean thermal energy generation as well as PV power generation, which are considered
文摘Utilization of wind energy is a promising way to generate power,and wind turbine blades play a key role in collecting the wind energy effectively.This paper attempts to measure the deformation parameter of wind turbine blades in mechanics experiments using a videometric method. In view that the blades experience small buckling deformation and large integral deformation simultaneously, we proposed a parallel network measurement(PNM) method including the key techniques such as camera network construction,camera calibration,distortion correction,the semi-automatic high-precision extraction of targets,coordinate systems unification,and bundle adjustment,etc. The relatively convenient construction method of the measuring system can provide an abundant measuring content,a wide measuring range and post processing.The experimental results show that the accuracy of the integral deformation measurement is higher than 0.5 mm and that of the buckling deformation measurement higher than 0.1mm.
基金Supported by Fundamental Research Funds for the Central Universities(SWU1209377)of Southwest UniversityEnterprise Management to Foster Discipline of Rongchang Campus(RCQG207001)of Southwest University
文摘At the background of urban and rural integration,this paper analyzed and discussed factors restricting large-scale farmland operation in China's hilly areas from the qualitative perspective. It recognized large-scale farmland operation on the basis of the long tail theory. Finally,it came up with recommendations for developing large-scale farmland operation in hilly areas.
