115 research outputs found
Research on the Application of E-commerce to Small and Medium Enterprises (SMEs): the Case of India
SMEs account for a large proportion and play an important role in the development of each country in the world, including India. The globalization will bring many advantages for enterprises however SMEs will face fierce competition at the local, national and International level. In order to maintain and promote the important role of SMEs in the context of increased competition, SMEs have to change and adopt new technologies. E-commerce and digital technologies are bringing opportunities to help SMEs improve their competitiveness, narrow the gap with big enterprises thanks to their fairness and flexibility of the digital business environment. According to UNIDO (2017), India is one of the countries successfully applying e-commerce to SMEs. Contributing to this success is the important role of the Indian government. Therefore, this paper focuses on researching the application of e-commerce to SMEs in terms of the role of government in promoting and creating an ecosystem for SMEs and e-commerce development
Deep Metric Learning Meets Deep Clustering: An Novel Unsupervised Approach for Feature Embedding
Unsupervised Deep Distance Metric Learning (UDML) aims to learn sample
similarities in the embedding space from an unlabeled dataset. Traditional UDML
methods usually use the triplet loss or pairwise loss which requires the mining
of positive and negative samples w.r.t. anchor data points. This is, however,
challenging in an unsupervised setting as the label information is not
available. In this paper, we propose a new UDML method that overcomes that
challenge. In particular, we propose to use a deep clustering loss to learn
centroids, i.e., pseudo labels, that represent semantic classes. During
learning, these centroids are also used to reconstruct the input samples. It
hence ensures the representativeness of centroids - each centroid represents
visually similar samples. Therefore, the centroids give information about
positive (visually similar) and negative (visually dissimilar) samples. Based
on pseudo labels, we propose a novel unsupervised metric loss which enforces
the positive concentration and negative separation of samples in the embedding
space. Experimental results on benchmarking datasets show that the proposed
approach outperforms other UDML methods.Comment: Accepted in BMVC 202
Addressing Non-IID Problem in Federated Autonomous Driving with Contrastive Divergence Loss
Federated learning has been widely applied in autonomous driving since it
enables training a learning model among vehicles without sharing users' data.
However, data from autonomous vehicles usually suffer from the
non-independent-and-identically-distributed (non-IID) problem, which may cause
negative effects on the convergence of the learning process. In this paper, we
propose a new contrastive divergence loss to address the non-IID problem in
autonomous driving by reducing the impact of divergence factors from
transmitted models during the local learning process of each silo. We also
analyze the effects of contrastive divergence in various autonomous driving
scenarios, under multiple network infrastructures, and with different
centralized/distributed learning schemes. Our intensive experiments on three
datasets demonstrate that our proposed contrastive divergence loss further
improves the performance over current state-of-the-art approaches
A Deep learning based food recognition system for lifelog images
In this paper, we propose a deep learning based system for food recognition from personal life archive im- ages. The system first identifies the eating moments based on multi-modal information, then tries to focus and enhance the food images available in these moments, and finally, exploits GoogleNet as the core of the learning process to recognise the food category of the images. Preliminary results, experimenting on the food recognition module of the proposed system, show that the proposed system achieves 95.97% classification accuracy on the food images taken from the personal life archive from several lifeloggers, which potentially can be extended and applied in broader scenarios and for different types of food categories
Reducing Training Time in Cross-Silo Federated Learning using Multigraph Topology
Federated learning is an active research topic since it enables several
participants to jointly train a model without sharing local data. Currently,
cross-silo federated learning is a popular training setting that utilizes a few
hundred reliable data silos with high-speed access links to training a model.
While this approach has been widely applied in real-world scenarios, designing
a robust topology to reduce the training time remains an open problem. In this
paper, we present a new multigraph topology for cross-silo federated learning.
We first construct the multigraph using the overlay graph. We then parse this
multigraph into different simple graphs with isolated nodes. The existence of
isolated nodes allows us to perform model aggregation without waiting for other
nodes, hence effectively reducing the training time. Intensive experiments on
three public datasets show that our proposed method significantly reduces the
training time compared with recent state-of-the-art topologies while
maintaining the accuracy of the learned model. Our code can be found at
https://github.com/aioz-ai/MultigraphFLComment: accepted in ICCV 202
Overcoming Data Limitation in Medical Visual Question Answering
Traditional approaches for Visual Question Answering (VQA) require large amount of labeled data for training. Unfortunately, such large scale data is usually not available for medical domain. In this paper, we propose a novel medical VQA framework that overcomes the labeled data limitation. The proposed framework explores the use of the unsupervised Denoising Auto-Encoder (DAE) and the supervised Meta-Learning. The advantage of DAE is to leverage the large amount of unlabeled images while the advantage of Meta-Learning is to learn meta-weights that quickly adapt to VQA problem with limited labeled data. By leveraging the advantages of these techniques, it allows the proposed framework to be efficiently trained using a small labeled training set. The experimental results show that our proposed method significantly outperforms the state-of-the-art medical VQA. The source code is available at https://github.com/aioz-ai/MICCAI19-MedVQA
Multiple Meta-model Quantifying for Medical Visual Question Answering
Transfer learning is an important step to extract meaningful features and overcome the data limitation in the medical Visual Question Answering (VQA) task. However, most of the existing medical VQA methods rely on external data for transfer learning, while the meta-data within the dataset is not fully utilized. In this paper, we present a new multiple meta-model quantifying method that effectively learns meta-annotation and leverages meaningful features to the medical VQA task. Our proposed method is designed to increase meta-data by auto-annotation, deal with noisy labels, and output meta-models which provide robust features for medical VQA tasks. Extensively experimental results on two public medical VQA datasets show that our approach achieves superior accuracy in comparison with other state-of-the-art methods, while does not require external data to train meta-models. Source code available at: https://github.com/aioz-ai/MICCAI21_MMQ
Structural assessment based on vibration measurement test combined with an artificial neural network for the steel truss bridge
Damage assessment is one of the most crucial issues for bridge engineers during the operational and maintenance phase, especially for existing steel bridges. Among several methodologies,
the vibration measurement test is a typical approach, in which the natural frequency variation of
the structure is monitored to detect the existence of damage. However, locating and quantifying the
damage is still a big challenge for this method, due to the required human resources and logistics
involved. In this regard, an artificial intelligence (AI)-based approach seems to be a potential way
of overcoming such obstacles. This study deployed a comprehensive campaign to determine all
the dynamic parameters of a predamaged steel truss bridge structure. Based on the results for
mode shape, natural frequency, and damping ratio, a finite element model (FEM) was created and
updated. The artificial intelligence networkâs input data from the damage cases were then analysed
and evaluated. The trained artificial neural network model was curated and evaluated to confirm
the approachâs feasibility. During the actual operational stage of the steel truss bridge, this damage
assessment system showed good performance, in terms of monitoring the structural behaviour of the
bridge under some unexpected accidents.This research was funded by FCT/MCTES through national funds (PIDDAC) from the
R&D Unit Institute for Sustainability and Innovation in Structural Engineering (ISISE), under the
reference UIDB/04029/2020, and from the Associate Laboratory Advanced Production and Intelligent
Systems ARISE, under the reference LA/P/0112/2020, as well as financial support of the project
research âB2022-GHA-03â from the Ministry of Education and Training. And The APC was funded
by ANI (âAgĂȘncia Nacional de Inovaçãoâ) through the financial support given to the R&D Project
âGOA Bridge Management SystemâBridge Intelligenceâ, with reference POCI-01-0247-FEDER069642, which was cofinanced by the European Regional Development Fund (FEDER) through the
Operational Competitiveness and Internationalisation Program (POCI)
- âŠ