9,341 research outputs found
Distributionally Robust Semi-Supervised Learning for People-Centric Sensing
Semi-supervised learning is crucial for alleviating labelling burdens in
people-centric sensing. However, human-generated data inherently suffer from
distribution shift in semi-supervised learning due to the diverse biological
conditions and behavior patterns of humans. To address this problem, we propose
a generic distributionally robust model for semi-supervised learning on
distributionally shifted data. Considering both the discrepancy and the
consistency between the labeled data and the unlabeled data, we learn the
latent features that reduce person-specific discrepancy and preserve
task-specific consistency. We evaluate our model in a variety of people-centric
recognition tasks on real-world datasets, including intention recognition,
activity recognition, muscular movement recognition and gesture recognition.
The experiment results demonstrate that the proposed model outperforms the
state-of-the-art methods.Comment: 8 pages, accepted by AAAI201
A Comprehensive Study on Knowledge Graph Embedding over Relational Patterns Based on Rule Learning
Knowledge Graph Embedding (KGE) has proven to be an effective approach to
solving the Knowledge Graph Completion (KGC) task. Relational patterns which
refer to relations with specific semantics exhibiting graph patterns are an
important factor in the performance of KGE models. Though KGE models'
capabilities are analyzed over different relational patterns in theory and a
rough connection between better relational patterns modeling and better
performance of KGC has been built, a comprehensive quantitative analysis on KGE
models over relational patterns remains absent so it is uncertain how the
theoretical support of KGE to a relational pattern contributes to the
performance of triples associated to such a relational pattern. To address this
challenge, we evaluate the performance of 7 KGE models over 4 common relational
patterns on 2 benchmarks, then conduct an analysis in theory, entity frequency,
and part-to-whole three aspects and get some counterintuitive conclusions.
Finally, we introduce a training-free method Score-based Patterns Adaptation
(SPA) to enhance KGE models' performance over various relational patterns. This
approach is simple yet effective and can be applied to KGE models without
additional training. Our experimental results demonstrate that our method
generally enhances performance over specific relational patterns. Our source
code is available from GitHub at
https://github.com/zjukg/Comprehensive-Study-over-Relational-Patterns.Comment: This paper is accepted by ISWC 202
Complex Organic Molecules Formation in Cold Cores on Stochastically Heated Grains
We investigate the roles of stochastic grain heating in the formation of
complex organic molecules (COMs) in cold cores, where COMs have been detected.
Two different types of grain-size distributions are used in the chemical
models. The first one is the MRN distribution, and the second one considers
grain coagulation to study its effects on the chemical evolution in these
environments. The macroscopic Monte Carlo method is used to perform the
two-phase chemical model simulations. We find that (1) grain coagulation can
affect certain gas-phase species, such as CO and NH, in the cold
core environments, which can be attributed to the volatile precursors
originating from the small grains with temperature fluctuations; (2) grains
with radii around 4.6 10 m contribute most to the
production of COMs on dust grains under cold core conditions, while few species
can be formed on even smaller grains with radii less than 2 10
m; (3) COMs formed on stochastically heated grains could help explain the
observed abundances of gas-phase COMs in cold cores.Comment: 15 pages, 10 figures, 3 tables. Accepted by MNRA
The Application Of The IoT For Minimizing Consumption In Smart Home
Excessive consumption leads to 7 trends of crises, including destruction of the atmosphere, energy crisis, social decline and conflicts. Over consumption also deteriorates human health. To reduce excessive consumption not only can improve health, it can also secure home safety and less energy consumption. The reducing over consumption can benefit human health and environmental protection. This motivates us to devise an innovative smart home App (SHA). After a survey to potential users, it reveals that the new features can help reduce the excessive consumption and deterioration of the human health as well as the transportation, healthcare and destruction of earth environment. Enterprises can also achieve their social responsibility through the implementation and popularization of the SHA as soon as possible
Different Kinds of Singular and Nonsingular Exact Traveling Wave Solutions of the Kudryashov-Sinelshchikov Equation in the Special Parametric Conditions
In this paper, by using the integral bifurcation method, we studied the Kudryashov-Sinelshchikov equation. In the special parametric conditions, some singular and nonsingular exact traveling wave solutions, such as periodic cusp-wave solutions, periodic loop-wave solutions, smooth loop-soliton solutions, smooth solitary wave solutions, periodic double wave solutions, periodic compacton solutions, and nonsmooth peakon solutions are obtained. Further more, the dynamic behaviors of these exact traveling wave solutions are investigated. It is found that the waveforms of some traveling wave solutions vary with the changes of parameters
Topology of nonlinearly charged black hole chemistry via massive gravity
The classification of critical points of charged topological black holes
(TBHs) in anti-de Sitter spacetime (AdS) under the Power Maxwell Invariant
(PMI)-massive gravity is accomplished within the framework of black hole
chemistry (BHC). Considering the grand canonical ensemble (GCE), we show that
black hole have only one topological class, whereas black holes
belong to two different topology classes. Furthermore, the conventional
critical point characterized by negative topological charge coincides with the
maximum extreme point of temperature; and the novel critical point featuring
opposite topological charge corresponds to the minimum extreme point of
temperature. With increasing pressure, new phases emerge at the novel critical
point while disappearing from the conventional one. Moreover, a atypical van
der Waals (vdW) behavior is found in dimensions, and the anomaly
disappears at the traditional critical point. In the limit of nonlinearity
parameter , different topology classes are only obtained in the GCE and
they may not exist within the canonical ensemble. With the absence of electric
potential , the neutral TBHs share the same topological classification
results as the charged TBHs in the GCE of Maxwell-massive gravity.Comment: 16pages,22 figure
Joule-Thomson expansion of charged dilatonic black holes
Based on the Einstein-Maxwell theory, the Joule-Thomson (J-T) expansion of
charged dilatonic black holes (the solutions are neither flat nor AdS) in
-dimensional spacetime is studied herein. To this end, we analyze the
effects of the dimension and dilaton field on J-T expansion. An
explicit expression for the J-T coefficient is derived, and consequently, a
negative heat capacity is found to lead to a cooling process. In contrast to
its effect on the dimension, the inversion curve decreases with charge at
low pressures, whereas the opposite effect is observed at high pressures. We
can observe that with an increase in the dimension or parameter ,
both the pressure cut-off point and the minimum inversion temperature
change. Moreover, we analyze the ratio numerically and discover
that the ratio is independent of charge; however, it depends on the dilaton
field and dimension: for and , the ratio is 1/2. The dilaton
field is found to enhance the ratio. In addition, we identify the
cooling-heating regions by investigating the inversion and isenthalpic curves,
and the behavior of the minimum inversion mass indicates that this
cooling-heating transition may not occur under certain special conditions
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