Enriching Context Information for Entity Linking with Web Data

Journal of Computer Science and Technology - Entity linking (EL) is the task of determining the identity of textual entity mentions given a predefined knowledge base (KB). Plenty of existing...     

一种16位灰度图像自动调窗算法

16位灰度图像常用在某些需要高精度的图像处理与分析中,但由于其灰度范围过大,需要调窗处理才能获取感兴趣的信息。采用人工手动调窗需要用户具有丰富的经验才能得到清晰的图像,并需要一定的时间,因此会降低用户的工作效率。现有的自动调窗算法不能很好地处理各种直方图分布的图像。针对这种情况,在分析了大量的16位灰度图像的基础上,提出了一种16位灰度图像自动调窗算法,算法在读入图像后自动判断图像直方图类型,并根据直方图类型计算最佳的窗位和窗宽。对所提出的方法进行了大量的实验验证,并与现有的调窗方法进行了比较。结果表明,文中方法可以显著地提高图像的清晰度和对比度,且比现有的调窗方法具有更好的性能。     

Predictions of HF communication MUF in the region of the SouthChina Sea

In this paper, an artificial-neural-network (ANN) method is employed to predict the HF-communication MUF (maximum useable frequency) in the region of the South China Sea. Historical observation data of f ₀F₂ from six ionospheric observatories around the South China Sea are used to train the network. The comparison of ANN predictions and International Reference Ionosphere (IRI) models with the observations shows that the ANN predictions are closer to the observed results than are the IRI predictions