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Among the human users of the Internet of Things, the hearing-impaired is a special group of people for whom normal information expression forms, such as voice and video are unaccessible, and most of them have some difficulty in understanding information in text form. The hearing-impaired are accustomed to receiving information expressed in sign language. For this situation, a new information expression form for the Internet of Things oriented toward the hearing-impaired is proposed in this paper, and the new expression is based on sign language video synthesis. Under the sign synthesis frame, three modules are necessary: constructing database, searching for appropriate sign language video units and transition units, and generating interpolated frames. With this method, text information could be transformed into sign language expression for the hearing-impaired. 相似文献
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光锥阵列耦合数字X射线探测器是获得大面积高分辨率数字X射线成像的重要途径,但目前通常采用粘结固定的方式实现光锥阵列各小端面与对应图像传感器芯片之间的耦合.为克服粘结耦合方式的不足,设计并实现了一种可微调的非粘结2×2光锥阵列耦合数字X射线探测器.该方案能够在调节空间受光锥阵列结构和硬件电路板尺寸限制,特别是竖直方向板间距离仅40mm的情况下,通过独特设计的水平和竖直调节机构在同一个调节层上对四块数据采集板分别进行多维度调节.利用四块数据采集板与数据传输板相互分立的特点,设计了基于ARM+4FPGA的嵌入式以太网多CMOS芯片传输数据采集系统,所实现的X射线探测器成像面积达100mm×100mm,能够完成可微调的非粘结耦合和多CMOS芯片的图像数据采集. 相似文献
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Partially-depleted Silicon-On-Insulator Negative Channel Metal Oxide Semiconductor (SOI NMOS) transistors with different layouts are fabricated on radiation hard Separation by IMplanted OXygen (SIMOX) substrate and tested using 10keV X-ray radiation sources. The radiation performance is characterized by transistor threshold voltage shift and transistor leakage currents as a function of the total dose up to 2.0×106 rad(Si). The results show that the total dose radiation effects on NMOS devices are very sensitive to their layout structures. 相似文献
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针对车辆对一切(V2X)通信所面临的频谱稀缺问题,文章提出了一种深度强化学习方法对V2X频谱资源进行管理。首先,建立单个车辆对基础设施链路的V2X通信模型,结合频谱子带和传输功率等约束条件,构建优化问题以最大化V2X通信网络综合效率;其次,考虑到优化问题的非凸性,将其建模为马尔可夫决策过程;接着,引入基于竞争构架Q网络(Dueling-DQN)算法,以获得最优频谱子带选择和传输功率分配策略,使V2X通信网络综合效率最大化;最后,通过Tensorflow软件平台进行实验仿真,以验证所提方法的性能。实验结果表明,Dueling-DQN算法与其他算法相比,能够获得更高的链路性能和V2X通信网络效率。 相似文献
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海杂波背景下的目标检测对军事和民用均具有重要意义,是雷达信号处理领域的研究热点与难点。传统广义似然比检测器在具有较强空间非均匀特性的海杂波中检测性能明显下降。文中提出基于子频带黎曼距离的检测器。首先,利用一组线性相位离散傅里叶变换调制滤波器将回波分解到不同子频带;随后,在每个子频带中,利用参考单元数据在Hermitian正定矩阵流形上的几何均值或几何中值估计杂波协方差矩阵,将待检测单元协方差矩阵与杂波协方差矩阵之间的黎曼距离作为检测统计量。基于仿真杂波数据和实测海杂波数据验证了所提方法可以有效提高海杂波背景下的目标检测性能。 相似文献