311 research outputs found
XMAM:X-raying Models with A Matrix to Reveal Backdoor Attacks for Federated Learning
Federated Learning (FL) has received increasing attention due to its privacy
protection capability. However, the base algorithm FedAvg is vulnerable when it
suffers from so-called backdoor attacks. Former researchers proposed several
robust aggregation methods. Unfortunately, many of these aggregation methods
are unable to defend against backdoor attacks. What's more, the attackers
recently have proposed some hiding methods that further improve backdoor
attacks' stealthiness, making all the existing robust aggregation methods fail.
To tackle the threat of backdoor attacks, we propose a new aggregation
method, X-raying Models with A Matrix (XMAM), to reveal the malicious local
model updates submitted by the backdoor attackers. Since we observe that the
output of the Softmax layer exhibits distinguishable patterns between malicious
and benign updates, we focus on the Softmax layer's output in which the
backdoor attackers are difficult to hide their malicious behavior.
Specifically, like X-ray examinations, we investigate the local model updates
by using a matrix as an input to get their Softmax layer's outputs. Then, we
preclude updates whose outputs are abnormal by clustering. Without any training
dataset in the server, the extensive evaluations show that our XMAM can
effectively distinguish malicious local model updates from benign ones. For
instance, when other methods fail to defend against the backdoor attacks at no
more than 20% malicious clients, our method can tolerate 45% malicious clients
in the black-box mode and about 30% in Projected Gradient Descent (PGD) mode.
Besides, under adaptive attacks, the results demonstrate that XMAM can still
complete the global model training task even when there are 40% malicious
clients. Finally, we analyze our method's screening complexity, and the results
show that XMAM is about 10-10000 times faster than the existing methods.Comment: 23 page
Conditional Goal-oriented Trajectory Prediction for Interacting Vehicles with Vectorized Representation
This paper aims to tackle the interactive behavior prediction task, and
proposes a novel Conditional Goal-oriented Trajectory Prediction (CGTP)
framework to jointly generate scene-compliant trajectories of two interacting
agents. Our CGTP framework is an end to end and interpretable model, including
three main stages: context encoding, goal interactive prediction and trajectory
interactive prediction. First, a Goals-of-Interest Network (GoINet) is designed
to extract the interactive features between agent-to-agent and agent-to-goals
using a graph-based vectorized representation. Further, the Conditional Goal
Prediction Network (CGPNet) focuses on goal interactive prediction via a
combined form of marginal and conditional goal predictors. Finally, the
Goaloriented Trajectory Forecasting Network (GTFNet) is proposed to implement
trajectory interactive prediction via the conditional goal-oriented predictors,
with the predicted future states of the other interacting agent taken as
inputs. In addition, a new goal interactive loss is developed to better learn
the joint probability distribution over goal candidates between two interacting
agents. In the end, the proposed method is conducted on Argoverse motion
forecasting dataset, In-house cut-in dataset, and Waymo open motion dataset.
The comparative results demonstrate the superior performance of our proposed
CGTP model than the mainstream prediction methods.Comment: 14 pages, 4 figure
RetouchingFFHQ: A Large-scale Dataset for Fine-grained Face Retouching Detection
The widespread use of face retouching filters on short-video platforms has
raised concerns about the authenticity of digital appearances and the impact of
deceptive advertising. To address these issues, there is a pressing need to
develop advanced face retouching techniques. However, the lack of large-scale
and fine-grained face retouching datasets has been a major obstacle to progress
in this field. In this paper, we introduce RetouchingFFHQ, a large-scale and
fine-grained face retouching dataset that contains over half a million
conditionally-retouched images. RetouchingFFHQ stands out from previous
datasets due to its large scale, high quality, fine-grainedness, and
customization. By including four typical types of face retouching operations
and different retouching levels, we extend the binary face retouching detection
into a fine-grained, multi-retouching type, and multi-retouching level
estimation problem. Additionally, we propose a Multi-granularity Attention
Module (MAM) as a plugin for CNN backbones for enhanced cross-scale
representation learning. Extensive experiments using different baselines as
well as our proposed method on RetouchingFFHQ show decent performance on face
retouching detection. With the proposed new dataset, we believe there is great
potential for future work to tackle the challenging problem of real-world
fine-grained face retouching detection.Comment: Under revie
The global landscape of approved antibody therapies
Antibody therapies have become an important class of therapeutics in recent years as they have exhibited outstanding efficacy and safety in the treatment of several major diseases including cancers, immune-related diseases, infectious disease and hematological disease. There has been significant progress in the global research and development landscape of antibody therapies in the past decade. In this review, we have collected available data from the Umabs Antibody Therapies Database (Umabs-DB, https://umabs.com) as of 30 June 2022. The Umabs-DB shows that 162 antibody therapies have been approved by at least one regulatory agency in the world, including 122 approvals in the US, followed by 114 in Europe, 82 in Japan and 73 in China, whereas biosimilar, diagnostic and veterinary antibodies are not included in our statistics. Although the US and Europe have been at the leading position for decades, rapid advancement has been witnessed in Japan and China in the past decade. The approved antibody therapies include 115 canonical antibodies, 14 antibody-drug conjugates, 7 bispecific antibodies, 8 antibody fragments, 3 radiolabeled antibodies, 1 antibody-conjugate immunotoxin, 2 immunoconjugates and 12 Fc-Fusion proteins. They have been developed against 91 drug targets, of which PD-1 is the most popular, with 14 approved antibody-based blockades for cancer treatment in the world. This review outlined the global landscape of the approved antibody therapies with respect to the regulation agencies, therapeutic targets and indications, aiming to provide an insight into the trends of the global development of antibody therapies
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