103 research outputs found
University students information support software module based on harmonyos
This article introduce the University students information support software module based on HarmonyOS
Forecasting of Economic Value Added in Entertainment Industry
This thesis is to evaluate the past performance and predict the future financial performance on the basis of real data of the entertainment company, Ubisoft Entertainment SA. We describes financial analysis and performance measures, which includes the characteristics of the economic value added. The prediction of economic value added is based on the prediction of financial plan by using Monte Carlo simulation in Excel.Finally, we make a conclusion on the financial situation of the company in the past ten years, evaluate the feasibility of Monte Carlo simulation and the investment feasibility of the company.This thesis is to evaluate the past performance and predict the future financial performance on the basis of real data of the entertainment company, Ubisoft Entertainment SA. We describes financial analysis and performance measures, which includes the characteristics of the economic value added. The prediction of economic value added is based on the prediction of financial plan by using Monte Carlo simulation in Excel.Finally, we make a conclusion on the financial situation of the company in the past ten years, evaluate the feasibility of Monte Carlo simulation and the investment feasibility of the company.154 - Katedra financívelmi dobř
Towards Trustworthy Explanation: On Causal Rationalization
With recent advances in natural language processing, rationalization becomes
an essential self-explaining diagram to disentangle the black box by selecting
a subset of input texts to account for the major variation in prediction. Yet,
existing association-based approaches on rationalization cannot identify true
rationales when two or more snippets are highly inter-correlated and thus
provide a similar contribution to prediction accuracy, so-called spuriousness.
To address this limitation, we novelly leverage two causal desiderata,
non-spuriousness and efficiency, into rationalization from the causal inference
perspective. We formally define a series of probabilities of causation based on
a newly proposed structural causal model of rationalization, with its
theoretical identification established as the main component of learning
necessary and sufficient rationales. The superior performance of the proposed
causal rationalization is demonstrated on real-world review and medical
datasets with extensive experiments compared to state-of-the-art methods.Comment: In Proceedings of the 40th International Conference on Machine
Learning (ICML) GitHub Repository:
https://github.com/onepounchman/Causal-Retionalizatio
Facial expression recognition method on static and dynamic image
This article is dedicated to analyze various facial expression recognition method based on different type of image, which aim at extracting feature on the image. Considering the method to optimize existing method
Localized Contrastive Learning on Graphs
Contrastive learning methods based on InfoNCE loss are popular in node
representation learning tasks on graph-structured data. However, its reliance
on data augmentation and its quadratic computational complexity might lead to
inconsistency and inefficiency problems. To mitigate these limitations, in this
paper, we introduce a simple yet effective contrastive model named Localized
Graph Contrastive Learning (Local-GCL in short). Local-GCL consists of two key
designs: 1) We fabricate the positive examples for each node directly using its
first-order neighbors, which frees our method from the reliance on
carefully-designed graph augmentations; 2) To improve the efficiency of
contrastive learning on graphs, we devise a kernelized contrastive loss, which
could be approximately computed in linear time and space complexity with
respect to the graph size. We provide theoretical analysis to justify the
effectiveness and rationality of the proposed methods. Experiments on various
datasets with different scales and properties demonstrate that in spite of its
simplicity, Local-GCL achieves quite competitive performance in self-supervised
node representation learning tasks on graphs with various scales and
properties
ET-AL: Entropy-Targeted Active Learning for Bias Mitigation in Materials Data
Growing materials data and data-driven informatics drastically promote the
discovery and design of materials. While there are significant advancements in
data-driven models, the quality of data resources is less studied despite its
huge impact on model performance. In this work, we focus on data bias arising
from uneven coverage of materials families in existing knowledge. Observing
different diversities among crystal systems in common materials databases, we
propose an information entropy-based metric for measuring this bias. To
mitigate the bias, we develop an entropy-targeted active learning (ET-AL)
framework, which guides the acquisition of new data to improve the diversity of
underrepresented crystal systems. We demonstrate the capability of ET-AL for
bias mitigation and the resulting improvement in downstream machine learning
models. This approach is broadly applicable to data-driven materials discovery,
including autonomous data acquisition and dataset trimming to reduce bias, as
well as data-driven informatics in other scientific domains.Comment: 35 pages, 13 figures, under revie
将视频多模态情感分析运用在临床抑郁检测中
The current clinical diagnosis of depression in the medical community relies on selfrating scales and physician interviews, but this approach is limited by the expertise of clinicians and the uneven distribution of medical resources. This paper proposes the use of video multimodal techniques in clinical diagnosis, aiming to improve the efficiency and accuracy of depression detection in clinical settings
Uncertainty-Aware Mixed-Variable Machine Learning for Materials Design
Data-driven design shows the promise of accelerating materials discovery but
is challenging due to the prohibitive cost of searching the vast design space
of chemistry, structure, and synthesis methods. Bayesian Optimization (BO)
employs uncertainty-aware machine learning models to select promising designs
to evaluate, hence reducing the cost. However, BO with mixed numerical and
categorical variables, which is of particular interest in materials design, has
not been well studied. In this work, we survey frequentist and Bayesian
approaches to uncertainty quantification of machine learning with mixed
variables. We then conduct a systematic comparative study of their performances
in BO using a popular representative model from each group, the random
forest-based Lolo model (frequentist) and the latent variable Gaussian process
model (Bayesian). We examine the efficacy of the two models in the optimization
of mathematical functions, as well as properties of structural and functional
materials, where we observe performance differences as related to problem
dimensionality and complexity. By investigating the machine learning models'
predictive and uncertainty estimation capabilities, we provide interpretations
of the observed performance differences. Our results provide practical guidance
on choosing between frequentist and Bayesian uncertainty-aware machine learning
models for mixed-variable BO in materials design
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