American Hollywood animated films have conquered the world.In recent years,many successful works have appeared in domestic animated films,bringing new vitality to the Chinese animated film industry.Based on Lacan’s M...American Hollywood animated films have conquered the world.In recent years,many successful works have appeared in domestic animated films,bringing new vitality to the Chinese animated film industry.Based on Lacan’s Mirror Stage Theory,this study attempts to start from the bravery of Judy and Nezha,the protagonists of Zootopia(2016)and Nezha(2019).It analyzes and compares their embodiment,formation,influence and reflection with real society to solve the problems of the two brave characters’formation causes,characteristic differences and social influences,including racial discrimination,individualism in American society and family problems in Chinese society.This study sheds light on the transmission of intercultural values in animated films.展开更多
分数阶Active Demons(fractional active demons,FAD)算法是图像非刚性配准的有效方法,并且能解决灰度均匀和弱纹理图像配准精度低,优化易陷入局部极小而导致的配准速度缓慢问题,但是该算法中分数阶最佳阶次的寻找需要通过多次实验人工...分数阶Active Demons(fractional active demons,FAD)算法是图像非刚性配准的有效方法,并且能解决灰度均匀和弱纹理图像配准精度低,优化易陷入局部极小而导致的配准速度缓慢问题,但是该算法中分数阶最佳阶次的寻找需要通过多次实验人工选取,缺乏阶次自适应性.针对该问题,提出了基于多分辨率和自适应分数阶的Active Demons算法,该算法首先根据图像梯度模值和信息熵,构建了自适应分数阶阶次的数学模型,基于该模型自动计算出分数阶的最佳阶次和微分动态模板;然后将多分辨率策略加入到自适应分数阶Active Demons算法中,进一步提高了图像配准效率.理论分析和实验结果均表明:提出的算法可用于灰度均匀、弱边缘和弱纹理图像的配准,能根据图像的局部特征自适应计算最佳分数阶阶次,并避免了算法陷入局部最优,从而提高了图像配准的精度和效率.展开更多
文摘American Hollywood animated films have conquered the world.In recent years,many successful works have appeared in domestic animated films,bringing new vitality to the Chinese animated film industry.Based on Lacan’s Mirror Stage Theory,this study attempts to start from the bravery of Judy and Nezha,the protagonists of Zootopia(2016)and Nezha(2019).It analyzes and compares their embodiment,formation,influence and reflection with real society to solve the problems of the two brave characters’formation causes,characteristic differences and social influences,including racial discrimination,individualism in American society and family problems in Chinese society.This study sheds light on the transmission of intercultural values in animated films.
文摘为了研究对转桨和单桨的目标特性差异,在大型空泡水筒中针对单桨和对转桨的非空泡和空泡工况进行了噪声测量试验,采集了单桨和对转桨在空化条件和非空化条件下的噪声信号。首先针对空泡水筒自身特性进行了分析研究,发现空泡水筒在1.8 kHz和3.8 kHz附近易产生混响干扰。其次,借助数字信号处理技术对测量的声信号进行谱分析,对比研究了单桨和对转桨在空化条件和非空化条件下噪声信号在频域上的差异和规律,并采用频闪仪和高速摄像机对桨叶空泡进行了观察。试验表明,在非空化条件下,相同工况时对转桨噪声级比单桨高6 d B以上,对转桨倍频程衰减值要小于单桨,对转桨和单桨的三分之一倍频程谱在1.8 kHz和3.8 kHz附近会出现峰值,单桨8 kHz附近峰值是由唱音引起;在空化条件下,相同工况时对转桨和单桨三分之一倍频程谱变化趋势基本一致,对转桨噪声级比单桨高3~20 d B。在空化和非空化条件下,对转桨的调制谱特征比单桨复杂,对转桨的调制频段要远大于单桨,对转桨前后桨一阶叶频组合的调制作用最强,而单桨一阶叶频调制作用最强。
