提出基于类词包(CSBOW,Class-Specific Bag of Words)技术的有监督图像分类算法。在训练阶段,首先在每一类训练图像库中提取特征点,运用SIFT描述符形成特征区域描述符,然后根据欧氏距离对特征矢量进行K均值聚类,每一类形成若干聚类中心...提出基于类词包(CSBOW,Class-Specific Bag of Words)技术的有监督图像分类算法。在训练阶段,首先在每一类训练图像库中提取特征点,运用SIFT描述符形成特征区域描述符,然后根据欧氏距离对特征矢量进行K均值聚类,每一类形成若干聚类中心即所谓类词包。在测试阶段,首先提取测试图像的特征点,运用SIFT描述符形成若干特征矢量,然后依次计算每个特征矢量与各聚类中心的欧式距离,运用竞争投票机制决定图像的分类结果。将CSBOW技术应用到商品图像分类,实验结果证明本算法分类正确率高于传统的基于词包和SVM的图像分类算法。展开更多
The effect of China＇s rapid development on Sino-US relations and the existing international order is an important theoretical issue in current international relations research. We use empirical research methods to ex...The effect of China＇s rapid development on Sino-US relations and the existing international order is an important theoretical issue in current international relations research. We use empirical research methods to explore whether and how China has influenced the results of US ＂vote-buying＂ in the United Nations General Assembly （UNGA） through foreign aid. We find that through the mechanisms of foreign policy preferences, vulnerability and credibility, Chinese foreign aid has decreased US manipulation of UNGA voting. However, this is not a subjective strategic choice on China＇s part but the objective result of Chinese economic development. Taking the game of Sino-US foreign aid in international politics as the entry point and squarely facing the structural contradictions and competition that exist between China and the US will help us understand not only the problems and obstacles China will encounter on its future developmental path, but also the necessity and difficulty of risk control in Sino-US relations.展开更多
文摘提出基于类词包(CSBOW,Class-Specific Bag of Words)技术的有监督图像分类算法。在训练阶段,首先在每一类训练图像库中提取特征点,运用SIFT描述符形成特征区域描述符,然后根据欧氏距离对特征矢量进行K均值聚类,每一类形成若干聚类中心即所谓类词包。在测试阶段,首先提取测试图像的特征点,运用SIFT描述符形成若干特征矢量,然后依次计算每个特征矢量与各聚类中心的欧式距离,运用竞争投票机制决定图像的分类结果。将CSBOW技术应用到商品图像分类,实验结果证明本算法分类正确率高于传统的基于词包和SVM的图像分类算法。
文摘The effect of China＇s rapid development on Sino-US relations and the existing international order is an important theoretical issue in current international relations research. We use empirical research methods to explore whether and how China has influenced the results of US ＂vote-buying＂ in the United Nations General Assembly （UNGA） through foreign aid. We find that through the mechanisms of foreign policy preferences, vulnerability and credibility, Chinese foreign aid has decreased US manipulation of UNGA voting. However, this is not a subjective strategic choice on China＇s part but the objective result of Chinese economic development. Taking the game of Sino-US foreign aid in international politics as the entry point and squarely facing the structural contradictions and competition that exist between China and the US will help us understand not only the problems and obstacles China will encounter on its future developmental path, but also the necessity and difficulty of risk control in Sino-US relations.
