1,510 research outputs found
Human Pose Estimation using Deep Consensus Voting
In this paper we consider the problem of human pose estimation from a single
still image. We propose a novel approach where each location in the image votes
for the position of each keypoint using a convolutional neural net. The voting
scheme allows us to utilize information from the whole image, rather than rely
on a sparse set of keypoint locations. Using dense, multi-target votes, not
only produces good keypoint predictions, but also enables us to compute
image-dependent joint keypoint probabilities by looking at consensus voting.
This differs from most previous methods where joint probabilities are learned
from relative keypoint locations and are independent of the image. We finally
combine the keypoints votes and joint probabilities in order to identify the
optimal pose configuration. We show our competitive performance on the MPII
Human Pose and Leeds Sports Pose datasets
Boosting API Recommendation with Implicit Feedback
Developers often need to use appropriate APIs to program efficiently, but it
is usually a difficult task to identify the exact one they need from a vast of
candidates. To ease the burden, a multitude of API recommendation approaches
have been proposed. However, most of the currently available API recommenders
do not support the effective integration of users' feedback into the
recommendation loop. In this paper, we propose a framework, BRAID (Boosting
RecommendAtion with Implicit FeeDback), which leverages learning-to-rank and
active learning techniques to boost recommendation performance. By exploiting
users' feedback information, we train a learning-to-rank model to re-rank the
recommendation results. In addition, we speed up the feedback learning process
with active learning. Existing query-based API recommendation approaches can be
plugged into BRAID. We select three state-of-the-art API recommendation
approaches as baselines to demonstrate the performance enhancement of BRAID
measured by Hit@k (Top-k), MAP, and MRR. Empirical experiments show that, with
acceptable overheads, the recommendation performance improves steadily and
substantially with the increasing percentage of feedback data, comparing with
the baselines.Comment: 15 pages, 4 figure
TFNet: Exploiting Temporal Cues for Fast and Accurate LiDAR Semantic Segmentation
LiDAR semantic segmentation plays a crucial role in enabling autonomous
driving and robots to understand their surroundings accurately and robustly.
There are different types of methods, such as point-based, range-image-based,
polar-based, and hybrid methods. Among these, range-image-based methods are
widely used due to their efficiency. However, they face a significant challenge
known as the ``many-to-one'' problem caused by the range image's limited
horizontal and vertical angular resolution. As a result, around 20\% of the 3D
points can be occluded. In this paper, we present TFNet, a range-image-based
LiDAR semantic segmentation method that utilizes temporal information to
address this issue. Specifically, we incorporate a temporal fusion layer to
extract useful information from previous scans and integrate it with the
current scan. We then design a max-voting-based post-processing technique to
correct false predictions, particularly those caused by the ``many-to-one''
issue. We evaluated the approach on two benchmarks and demonstrate that the
post-processing technique is generic and can be applied to various networks. We
will release our code and models
Sensitivity analysis of circadian entrainment in the space of phase response curves
Sensitivity analysis is a classical and fundamental tool to evaluate the role
of a given parameter in a given system characteristic. Because the phase
response curve is a fundamental input--output characteristic of oscillators, we
developed a sensitivity analysis for oscillator models in the space of phase
response curves. The proposed tool can be applied to high-dimensional
oscillator models without facing the curse of dimensionality obstacle
associated with numerical exploration of the parameter space. Application of
this tool to a state-of-the-art model of circadian rhythms suggests that it can
be useful and instrumental to biological investigations.Comment: 22 pages, 8 figures. Correction of a mistake in Definition 2.1. arXiv
admin note: text overlap with arXiv:1206.414
Risk factors for the development of bronchiectasis in patients with asthma
Asthma; Medical researchAsma; Investigación médicaAsma; Recerca mèdicaThough asthma and bronchiectasis are two different diseases, their coexistence has been demonstrated in many patients. The aim of the present study is to compare the characteristics of asthmatic patients with and without bronchiectasis and to assess risk factors for the development of this condition. Two hundred and twenty-four moderate-severe asthmatic patients were included. The severity of bronchiectasis was assessed by Reiff and FACED parameters. Logistic regression was used to identify independent factors associated with bronchiectasis. Bronchiectasis was identified in 78 asthma patients. In severe asthma patients, its prevalence was 56.9%. Bronchiectasis was defined as mild in81% of patients using modified Reiff criteria and in 74% using FACED criteria. Asthmatic patients with bronchiectasis had decreasing FEV1, FVC and FEV1/FVC (p = 0.002, 0.005 and 0.014 respectively), presented more frequent asthma exacerbations (p < 0.001) and worse asthma control (ACT 21 vs 16pts, p < 0.001). Factors independently associated with bronchiectasis were older age (42–65 years: OR, 3.99; 95% CI 1.60 to 9.95, P = 0.003; ≥ 65 years: OR, 2.91; 95% CI 1.06 to 8.04, P = 0.039), severe asthma grade (OR, 8.91; 95% CI 3.69 to 21.49; P < 0.001) and frequency of asthma exacerbations (OR, 4.43; 95% CI 1.78 to 11.05; P < 0.001). In patients with severe asthma, age of asthma onset (OR, 1.02; 95% CI 1.01 to 1.04; P = 0.015) and asthma exacerbations (OR, 4.88; 95% CI 1.98 to 12.03; P = 0.001) were independently associated with the development of bronchiectasis. The prevalence of bronchiectasis in severe asthmatic patients is high. Age of asthma onset and exacerbations were independent factors associated with the occurrence of bronchiectasis.The study was partially supported by FIS PI15/01900 (Fondo Europeo de Desarrollo Regional (FEDER) and Fundacio Catalana de Pneumología (FUCAP). MJC is supported by the Miguel Servet program of the Instituto de Salud Carlos III (MSII17/00025). The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript
Quantum Algorithm for Dynamic Programming Approach for DAGs. Applications for Zhegalkin Polynomial Evaluation and Some Problems on DAGs
In this paper, we present a quantum algorithm for dynamic programming
approach for problems on directed acyclic graphs (DAGs). The running time of
the algorithm is , and the running time of the
best known deterministic algorithm is , where is the number of
vertices, is the number of vertices with at least one outgoing edge;
is the number of edges. We show that we can solve problems that use OR,
AND, NAND, MAX and MIN functions as the main transition steps. The approach is
useful for a couple of problems. One of them is computing a Boolean formula
that is represented by Zhegalkin polynomial, a Boolean circuit with shared
input and non-constant depth evaluating. Another two are the single source
longest paths search for weighted DAGs and the diameter search problem for
unweighted DAGs.Comment: UCNC2019 Conference pape
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