6,055 research outputs found
Research on technical analysis of basketball match based on data mining
The aim of this paper is to preprocess basketball technology actions, to classify these actionswith data mining technology, to mine association rules among them. The main works are shown below:The common approaches of data mining are discussed, such as preprocessing technology, classification technology, clustering technology and mining rules technology. Both ID3 decision tree classification algorithm association and Apriori association rules algorithm are studied in detail.The paper discusses basketball technology actionsboth on a small scale and a large scale, J48 decision tree classification and Apriori association rules mining algorithm basketball are applied, all these research results should have useful instruction to team
Solving specified-time distributed optimization problem via sampled-data-based algorithm
Despite significant advances on distributed continuous-time optimization of
multi-agent networks, there is still lack of an efficient algorithm to achieve
the goal of distributed optimization at a pre-specified time. Herein, we design
a specified-time distributed optimization algorithm for connected agents with
directed topologies to collectively minimize the sum of individual objective
functions subject to an equality constraint. With the designed algorithm, the
settling time of distributed optimization can be exactly predefined. The
specified selection of such a settling time is independent of not only the
initial conditions of agents, but also the algorithm parameters and the
communication topologies. Furthermore, the proposed algorithm can realize
specified-time optimization by exchanging information among neighbours only at
discrete sampling instants and thus reduces the communication burden. In
addition, the equality constraint is always satisfied during the whole process,
which makes the proposed algorithm applicable to online solving distributed
optimization problems such as economic dispatch. For the special case of
undirected communication topologies, a reduced-order algorithm is also
designed. Finally, the effectiveness of the theoretical analysis is justified
by numerical simulations
Cyclotron Dynamics of a Kondo Singlet in a Spin-Orbit-Coupled Alkaline-Earth Atomic Gas
We propose a scheme to investigate the interplay between Kondo-exchange
interaction and quantum spin Hall effect with ultracold fermionic
alkaline-earth atoms trapped in two-dimensional optical lattices using
ultracold collision and laser-assisted tunneling. In the strong Kondo-coupling
regime, though the loop trajectory of the mobile atom disappears, collective
dynamics of an atom pair in two clock states can exhibit an unexpected
spin-dependent cyclotron orbit in a plaquette, realizing the quantum spin Hall
effect of the Kondo singlet. We demonstrate that the collective cyclotron
dynamics of the spin-zero Kondo singlet is governed by an effective
Harper-Hofstadter model in addition to second-order diagonal tunneling
Counterfactual Cross-modality Reasoning for Weakly Supervised Video Moment Localization
Video moment localization aims to retrieve the target segment of an untrimmed
video according to the natural language query. Weakly supervised methods gains
attention recently, as the precise temporal location of the target segment is
not always available. However, one of the greatest challenges encountered by
the weakly supervised method is implied in the mismatch between the video and
language induced by the coarse temporal annotations. To refine the
vision-language alignment, recent works contrast the cross-modality
similarities driven by reconstructing masked queries between positive and
negative video proposals. However, the reconstruction may be influenced by the
latent spurious correlation between the unmasked and the masked parts, which
distorts the restoring process and further degrades the efficacy of contrastive
learning since the masked words are not completely reconstructed from the
cross-modality knowledge. In this paper, we discover and mitigate this spurious
correlation through a novel proposed counterfactual cross-modality reasoning
method. Specifically, we first formulate query reconstruction as an aggregated
causal effect of cross-modality and query knowledge. Then by introducing
counterfactual cross-modality knowledge into this aggregation, the spurious
impact of the unmasked part contributing to the reconstruction is explicitly
modeled. Finally, by suppressing the unimodal effect of masked query, we can
rectify the reconstructions of video proposals to perform reasonable
contrastive learning. Extensive experimental evaluations demonstrate the
effectiveness of our proposed method. The code is available at
\href{https://github.com/sLdZ0306/CCR}{https://github.com/sLdZ0306/CCR}.Comment: Accepted by ACM MM 202
LHX1 as a potential biomarker regulates EMT induction and cellular behaviors in uterine corpus endometrial carcinoma
Objectives: To investigate the expression of LHX1 and its role as a biomarker in the diagnosis and prognosis of Uterine Corpus Endometrial Carcinoma (UCEC).
Methods: The Cancer Genome Atlas (TCGA) database was used to detect the expression level of LHX1 in UCEC cells and tissues, and to find out the effect of LHX1 on prognosis. Co-expressed genes were then identified by Spearman correlation analysis, and the protein-protein interaction network was constructed using Cytoscape software. The R “clusterProfiler” package was used to conduct Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses. A series of in vitro experiments were performed to evaluate LHX1 expression and detect UCEC cell proliferation, invasion, and migration. Western blotting was used to determine the effect of LHX1 on expression levels of Epithelial-Mesenchymal Transition (EMT)-related proteins.
Results: LHX1 was upregulated in UCEC tissues and correlated with poor overall survival and disease-specific survival outcomes. Functional enrichment analysis suggested that genes co-expressed with LHX1 were enriched in cell adhesion. The expression of LHX1 was positively correlated with the expression levels of genes related to EMT induction and invasion. LHX1 can enhance the proliferation, migration, and invasion activities of UCEC cells in vitro, and alter the expression levels of EMT-related proteins.
Conclusion: LHX1 expression was highly upregulated in UCEC cells and tissues, which was correlated with the prognosis of patients with UCEC. LHX1 may regulate UCEC progression at least in part by modulating EMT induction
Cooperative Control of Multi-Channel Linear Systems with Self-Organizing Private Agents
Cooperative behavior design for multi-agent systems with collective tasks is
a critical issue to promote swarm intelligence. This paper investigates
cooperative control for a multi-channel system, where each channel is managed
by an agent that can communicate with neighbors in a network. Each agent is
expected to self-organize a controller based only on local information and
local interaction to stabilize the multi-channel system collaboratively. A
novel cooperative control strategy is designed for each agent by leveraging a
decomposing technique and a fusion approach. Then, a privacy-preserving
mechanism is incorporated into this strategy to shield all private information
from eavesdropping. Moreover, a fully distributed designing method for the
strategy parameters is developed. As a result, agents can self-design and
self-perform their controllers with private information preserved. It is proved
that the multi-channel system stability can be ensured by the proposed strategy
with finite fusion steps during each control interval. In addition, the cost of
introducing the privacy-preserving mechanism and the effect of adding more
channels on the system performance are quantitatively analyzed, which benefits
mechanism design and channel placement. Finally, several comparative simulation
examples are provided to demonstrate the effectiveness of the theoretical
results
- …