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基于CMOS工艺设计了一种能够自动调节补偿斜率的斜坡补偿电路。该电路可以跟随输入和输出信号的变化,相应地给出适当的斜坡补偿量,不仅使得峰值电流模式BOOST变换器可以稳定工作,而且可以避免补偿不当的现象,保证变换器有足够快的瞬态响应。仿真结果表明该电路产生的斜坡补偿信号的精度可以达到83%以上。 相似文献
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In this paper a detail insight into the role of oxide/barrier interfacial charges (Nox) for shifting the threshold voltage (VT) of AlN/GaN metal oxide semiconductor high electron mobility transistors (MOSHEMTs) is gained. A model is developed for VT considering all possible charges arise at different interfaces. To validate the model the proposed device is simulated by considering different insulators and Nox into account. It is very fascinating to observe that VT is highly sensitive towards change in Nox at higher oxide dimensions, whereas at lower dimensions Nox has very negligible effect. Normally-off operation can be achieved by increasing or decreasing Nox in MOSHEMT with Al2O3 or HfO2 as gate dielectric respectively. 相似文献
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针对沙尘天气下图像色彩偏移严重及对比度低等问题,提出一种基于直方图均衡化与带色彩恢复的多尺度视网膜(MSRCR)增强的沙尘降质图像增强算法。通过偏色校正和图像增强两个步骤进行图像恢复,将RGB图像各通道预处理后利用限制对比度自适应直方图均衡方法得到校正后的图像,对图像采用双边滤波进行降噪处理,通过MSRCR算法进一步解决色彩失衡问题。由于处理后的图像对比度较低,存在一定色偏,利用伽马校正和基于图像分析的偏色检测及颜色校正方法进行处理得到最终结果。对大量沙尘降质图像进行仿真实验,结果表明,该算法能够有效处理不同偏色程度的沙尘图像,不仅提高了图像的对比度,而且有效避免了图像颜色偏移现象,相比GCANet、MSRCR等算法,平均时间效率提升了46.2%~94.7%。 相似文献
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The plasmonic properties of gold nanostructures composed of a disk outside a nonconcentric ring are numerically studied by the finite difference time domain(FDTD) method. Simulated results show that two Fano resonances are formed as a result of the coupling of the octupolar and quadrupolar modes of the ring with the dipolar mode of the disk. The reduction in structural symmetry causes a red shift of the Fano resonances and distinct changes in spectral lineshape by offsetting the center of the in... 相似文献
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针对向卷积神经网络(CNN)中嵌入注意力机制模块以提高模型应用精度导致参数和计算量增加的问题,提出基于挤压激励的轻量化高度维度挤压激励(HD-SE)模块和宽度维度挤压激励(WD-SE)模块。为了充分利用特征图中潜在的信息,HD-SE对卷积层输出的特征图在高度维度上进行挤压激励操作,获得高度维度上的权重信息;而WD-SE在宽度维度上进行挤压激励操作,以得到特征图宽度维度上的权重信息;然后,将得到的权重信息分别应用于对应维度的特征图张量,以提高模型的应用精度。将HD-SE与WD-SE分别嵌入VGG16、ResNet56、MobileNetV1和MobileNetV2模型中,在CIFAR10和CIFAR100数据集上进行的实验结果表明,与挤压激励(SE)模块、协调注意力(CA)模块、卷积块注意力模块(CBAM)和高效通道注意力(ECA)模块等先进的注意力机制模块相比,HD-SE与WD-SE在向网络模型中增加的参数和计算量更少的同时得到的精度相似或者更高。 相似文献
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