11,058 research outputs found
Multi-Task Domain Adaptation for Deep Learning of Instance Grasping from Simulation
Learning-based approaches to robotic manipulation are limited by the
scalability of data collection and accessibility of labels. In this paper, we
present a multi-task domain adaptation framework for instance grasping in
cluttered scenes by utilizing simulated robot experiments. Our neural network
takes monocular RGB images and the instance segmentation mask of a specified
target object as inputs, and predicts the probability of successfully grasping
the specified object for each candidate motor command. The proposed transfer
learning framework trains a model for instance grasping in simulation and uses
a domain-adversarial loss to transfer the trained model to real robots using
indiscriminate grasping data, which is available both in simulation and the
real world. We evaluate our model in real-world robot experiments, comparing it
with alternative model architectures as well as an indiscriminate grasping
baseline.Comment: ICRA 201
Oligodendrocyte precursor cells: the multitaskers in the brain
In the central nervous system, oligodendrocyte precursor cells (OPCs) are recognized as the progenitors responsible for the
generation of oligodendrocytes, which play a critical role in myelination. Extensive research has shed light on the mechanisms
underlying OPC proliferation and diferentiation into mature myelin-forming oligodendrocytes. However, recent advances
in the feld have revealed that OPCs have multiple functions beyond their role as progenitors, exerting control over neural
circuits and brain function through distinct pathways. This review aims to provide a comprehensive understanding of OPCs
by frst introducing their well-established features. Subsequently, we delve into the emerging roles of OPCs in modulating brain function in both healthy and diseased states. Unraveling the cellular and molecular mechanisms by which OPCs
infuence brain function holds great promise for identifying novel therapeutic targets for central nervous system diseases
Global dynamics of a parabolic type equation arising from the curvature flow
This paper studies a type of degenerate parabolic problem with nonlocal term
\begin{equation*}
\begin{cases}
u_t=u^p(u_{xx}+u-\bar{u}) & 0<t<T_{{\max}},\ 0<x<a,
u_x(0,t)=u_x(a,t)=0 & 0<t<T_{{\max}},
u(x,0)=u_0(x) & 0<x<a,
\end{cases} \end{equation*} where , . In this paper, the
classification of the finite-time blowup/global existence phenomena based on
the associated energy functional and explicit expression of all nonnegative
steady states are demonstrated. Moreover, we combine the applications of
Lojasiewicz-Simon inequality and energy estimates to derive that any bounded
solution with positive initial data converges to some steady state as
KernelGPA: A Globally Optimal Solution to Deformable SLAM in Closed-form
We study the generalized Procrustes analysis (GPA), as a minimal formulation
to the simultaneous localization and mapping (SLAM) problem. We propose
KernelGPA, a novel global registration technique to solve SLAM in the
deformable environment. We propose the concept of deformable transformation
which encodes the entangled pose and deformation. We define deformable
transformations using a kernel method, and show that both the deformable
transformations and the environment map can be solved globally in closed-form,
up to global scale ambiguities. We solve the scale ambiguities by an
optimization formulation that maximizes rigidity. We demonstrate KernelGPA
using the Gaussian kernel, and validate the superiority of KernelGPA with
various datasets. Code and data are available at
\url{https://bitbucket.org/FangBai/deformableprocrustes}.Comment: This paper has been accepted for publication in the International
Journal of Robotics Research, 2023. https://doi.org/10.1177/0278364923119538
Shelter: Smartphone Bridged Socialized Body Networks for Epidemic Control
We propose using information, computing and networking innovations to tackle epidemic control challenges
Deep Virtual-to-Real Distillation for Pedestrian Crossing Prediction
Pedestrian crossing is one of the most typical behavior which conflicts with
natural driving behavior of vehicles. Consequently, pedestrian crossing
prediction is one of the primary task that influences the vehicle planning for
safe driving. However, current methods that rely on the practically collected
data in real driving scenes cannot depict and cover all kinds of scene
condition in real traffic world. To this end, we formulate a deep virtual to
real distillation framework by introducing the synthetic data that can be
generated conveniently, and borrow the abundant information of pedestrian
movement in synthetic videos for the pedestrian crossing prediction in real
data with a simple and lightweight implementation. In order to verify this
framework, we construct a benchmark with 4667 virtual videos owning about 745k
frames (called Virtual-PedCross-4667), and evaluate the proposed method on two
challenging datasets collected in real driving situations, i.e., JAAD and PIE
datasets. State-of-the-art performance of this framework is demonstrated by
exhaustive experiment analysis. The dataset and code can be downloaded from the
website \url{http://www.lotvs.net/code_data/}.Comment: Accepted by ITSC 202
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