Knowledge-Based Topic Model for Unsupervised Object Discovery and Localization

2018 ◽  
Vol 27 (1) ◽  
pp. 50-63 ◽  
Author(s):  
Zhenxing Niu ◽  
Gang Hua ◽  
Le Wang ◽  
Xinbo Gao
2020 ◽  
Vol 22 (8) ◽  
pp. 2098-2110 ◽  
Author(s):  
Feng Xue ◽  
Richang Hong ◽  
Xiangnan He ◽  
Jianwei Wang ◽  
Shengsheng Qian ◽  
...  

2020 ◽  
Author(s):  
Kai Zhang ◽  
Yuan Zhou ◽  
Zheng Chen ◽  
Yufei Liu ◽  
Zhuo Tang ◽  
...  

Abstract The prevalence of short texts on the Web has made mining the latent topic structures of short texts a critical and fundamental task for many applications. However, due to the lack of word co-occurrence information induced by the content sparsity of short texts, it is challenging for traditional topic models like latent Dirichlet allocation (LDA) to extract coherent topic structures on short texts. Incorporating external semantic knowledge into the topic modeling process is an effective strategy to improve the coherence of inferred topics. In this paper, we develop a novel topic model—called biterm correlation knowledge-based topic model (BCK-TM)—to infer latent topics from short texts. Specifically, the proposed model mines biterm correlation knowledge automatically based on recent progress in word embedding, which can represent semantic information of words in a continuous vector space. To incorporate external knowledge, a knowledge incorporation mechanism is designed over the latent topic layer to regularize the topic assignment of each biterm during the topic sampling process. Experimental results on three public benchmark datasets illustrate the superior performance of the proposed approach over several state-of-the-art baseline models.


2012 ◽  
Vol 190-191 ◽  
pp. 944-948
Author(s):  
Jun Guo ◽  
Hao Sun ◽  
Chang Ren Zhu

Category level object discovery is important for a number of applications such as remote sensing image classification, and data mining in images and video sequences. This paper presents a novel unsupervised learning algorithm for discovering object category and their locations in video sequences. Both appearance consistency and motion consistency of local patches across frames are exploited. Video patches are first extracted and represented by spatial-temporal context words. A dynamic topic model is then introduced to learn object categories in video sequences. The proposed dynamic model can categorize and localize multiple objects in a single video. Experimental results on the CamVid dataset and the VISATTM dataset demonstrate the effectiveness of our method.


Author(s):  
Feng Xue ◽  
Jian Sun ◽  
Xueliang Liu ◽  
Tianpeng Liu ◽  
Qiang Lu

2019 ◽  
Vol 11 (12) ◽  
pp. 3478 ◽  
Author(s):  
Jiho Kang ◽  
Junseok Lee ◽  
Dongsik Jang ◽  
Sangsung Park

In today’s knowledge-based society, industry-university cooperation (IUC) is recognized as an effective tool for technological innovation. Many studies have shown that selecting the right partner is essential to the success of the IUC. Although there have been a lot of studies on the criteria for selecting a suitable partner for IUC or strategic alliances, there has been a problem of making decisions depending on the qualitative judgment of experts or staff. While related works using patent analysis enabled the quantitative analysis and comparison of potential research partners, they overlooked the fact that there are several sub-technologies in one specific technology domain and that the applicant’s research concentration and competency are not the same for every sub-technology. This study suggests a systematic methodology that combines the Latent Dirichlet Allocation (LDA) topic model and the clustering algorithm in order to classify the sub-technology categories of a particular technology domain, and identifies the best college partners in each category. In addition, a similar-patent density (SPD) index was proposed and utilized for an objective comparison of potential university partners. In order to investigate the practical applicability of the proposed methodology, we conducted experiments using real patent data on the electric vehicle domain obtained from the Korean Intellectual Property Office. As a result, we identified 10 research and development sectors wherein Hyundai Motor Company (HMC) focuses using LDA and clustering. The universities with the highest values of SPD for each sector were chosen to be the most suitable partners of HMC for collaborative research.


2010 ◽  
pp. 21-49 ◽  
Author(s):  
Michele Ruta ◽  
◽  
Eugenio Di Sciascio ◽  
Giacomo Piscitelli ◽  
Floriano Scioscia ◽  
...  

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