455 research outputs found
Topic-based integrator matching for pull request
Pull Request (PR) is the main method for code contributions from the external
contributors in GitHub. PR review is an essential part of open source software
developments to maintain the quality of software. Matching a new PR for an
appropriate integrator will make the PR reviewing more effective. However, PR
and integrator matching are now organized manually in GitHub. To make this
process more efficient, we propose a Topic-based Integrator Matching Algorithm
(TIMA) to predict highly relevant collaborators(the core developers) as the
integrator to incoming PRs . TIMA takes full advantage of the textual semantics
of PRs. To define the relationships between topics and collaborators, TIMA
builds a relation matrix about topic and collaborators. According to the
relevance between topics and collaborators, TIMA matches the suitable
collaborators as the PR integrator
An oil painters recognition method based on cluster multiple kernel learning algorithm
A lot of image processing research works focus on natural images, such as in classification, clustering, and the research on the recognition of artworks (such as oil paintings), from feature extraction to classifier design, is relatively few. This paper focuses on oil painter recognition and tries to find the mobile application to recognize the painter. This paper proposes a cluster multiple kernel learning algorithm, which extracts oil painting features from three aspects: color, texture, and spatial layout, and generates multiple candidate kernels with different kernel functions. With the results of clustering numerous candidate kernels, we selected the sub-kernels with better classification performance, and use the traditional multiple kernel learning algorithm to carry out the multi-feature fusion classification. The algorithm achieves a better result on the Painting91 than using traditional multiple kernel learning directly
Study of Valve Motion in Reciprocating Refrigerator Compressors based on the 3-D Fluid–structure Interaction Model
Ă‚ Abstract: In this paper, a 3-D fluid-structure interaction model was established to investigate the working process of the small reciprocating refrigeration compressors. According to the numerical calculation, the working process of the small reciprocating refrigeration compressor, the motion of valve and the impact velocity and the contact stress of discharge valve and suction valve were given. Experiments on a small reciprocating refrigeration compressor for testing the p-v graph were carried out .Experimental results agree well with the numeric model. The result provides a guidance to research and design the small reciprocating refrigeration compressors
PromptTTS: Controllable Text-to-Speech with Text Descriptions
Using a text description as prompt to guide the generation of text or images
(e.g., GPT-3 or DALLE-2) has drawn wide attention recently. Beyond text and
image generation, in this work, we explore the possibility of utilizing text
descriptions to guide speech synthesis. Thus, we develop a text-to-speech (TTS)
system (dubbed as PromptTTS) that takes a prompt with both style and content
descriptions as input to synthesize the corresponding speech. Specifically,
PromptTTS consists of a style encoder and a content encoder to extract the
corresponding representations from the prompt, and a speech decoder to
synthesize speech according to the extracted style and content representations.
Compared with previous works in controllable TTS that require users to have
acoustic knowledge to understand style factors such as prosody and pitch,
PromptTTS is more user-friendly since text descriptions are a more natural way
to express speech style (e.g., ''A lady whispers to her friend slowly''). Given
that there is no TTS dataset with prompts, to benchmark the task of PromptTTS,
we construct and release a dataset containing prompts with style and content
information and the corresponding speech. Experiments show that PromptTTS can
generate speech with precise style control and high speech quality. Audio
samples and our dataset are publicly available.Comment: Submitted to ICASSP 202
Fast Computation of Sliding Discrete Tchebichef Moments and Its Application in Duplicated Regions Detection
International audienceComputational load remains a major concern when processing signals by means of sliding transforms. In this paper, we present an efficient algorithm for the fast computation of one-dimensional and two-dimensional sliding discrete Tchebichef moments. To do so, we first establish the relationships that exist between the Tchebichef moments of two neighboring windows taking advantage of Tchebichef polynomials’ properties. We then propose an original way to fast compute the moments of one window by utilizing the moment values of its previous window. We further theoretically establish the complexity of our fast algorithm and illustrate its interest within the framework of digital forensics and more precisely the detection of duplicated regions in an audio signal or an image. Our algorithm is used to extract local features of such a signal tampering. Experimental results show that its complexity is independent of the window size, validating the theory. They also exhibit that our algorithm is suitable to digital forensics and beyond to any applications based on sliding Tchebichef moments
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