537 research outputs found
ロボティックスワームにおける群れ行動の自動的設計
内容の要約広島大学(Hiroshima University)博士(工学)Doctor of Engineeringdoctora
RT-LM: Uncertainty-Aware Resource Management for Real-Time Inference of Language Models
Recent advancements in language models (LMs) have gained substantial
attentions on their capability to generate human-like responses. Though
exhibiting a promising future for various applications such as conversation AI,
these LMs face deployment challenges on various devices due to their extreme
computational cost and unpredictable inference latency. Such varied inference
latency, identified as a consequence of uncertainty intrinsic to the nature of
language, can lead to computational inefficiency and degrade the overall
performance of LMs, especially under high-traffic workloads. Unfortunately, the
bandwidth of these uncertainty sources is extensive, complicating the
prediction of latency and the effects emanating from such uncertainties. To
understand and mitigate the impact of uncertainty on real-time
response-demanding systems, we take the first step to comprehend, quantify and
optimize these uncertainty-induced latency performance variations in LMs.
Specifically, we present RT-LM, an uncertainty-aware resource management
ecosystem for real-time inference of LMs. RT-LM innovatively quantifies how
specific input uncertainties, adversely affect latency, often leading to an
increased output length. Exploiting these insights, we devise a lightweight yet
effective method to dynamically correlate input text uncertainties with output
length at runtime. Utilizing this quantification as a latency heuristic, we
integrate the uncertainty information into a system-level scheduler which
explores several uncertainty-induced optimization opportunities, including
uncertainty-aware prioritization, dynamic consolidation, and strategic CPU
offloading. Quantitative experiments across five state-of-the-art LMs on two
hardware platforms demonstrates that RT-LM can significantly reduce the average
response time and improve throughput while incurring a rather small runtime
overhead.Comment: Accepted by RTSS 202
Mode and vibration characteristics of a flexible manipulator with elastic restraint joint
To construct a precise model for investigating the dynamic characteristics and vibration control strategies of flexible manipulators, restraints of the joint should be fully considered and precisely described. Considering the effect of the elastic restraints of the joint, this paper investigated the mode and vibration characteristics of a flexible manipulator with elastic restraint joint (FMERJ). The elastic restraint model and boundary conditions of the FMERJ were established. With the boundary conditions, natural frequency equation and mode shapes of the FMERJ were derived. Subsequently, vibration responses of the FMERJ were obtained. Numerical results demonstrated that the mode and vibration characteristics of the FMERJ are obviously different from that of flexible manipulator with fixed restraint joint (FMFRJ) which was commonly idealized in present research, and the elastic restraints of the joint have a considerable effect on the dynamic characteristics and should be considered in precise dynamic analysis and further constructing vibration control strategies of the flexible manipulator
A general construction of regular complete permutation polynomials
Let be a positive integer and the finite field with
elements. In this paper, we consider the -regular complete permutation
property of maps with the form where
is a PP over an extension field and is an
invertible linear map over . We give a general construction
of -regular PPs for any positive integer . When is additive, we
give a general construction of -regular CPPs for any positive integer .
When is not additive, we give many examples of regular CPPs over the
extension fields for and for arbitrary odd positive integer .
These examples are the generalization of the first class of -regular CPPs
constructed by Xu, Zeng and Zhang (Des. Codes Cryptogr. 90, 545-575 (2022)).Comment: 24 page
Regular complete permutation polynomials over quadratic extension fields
Let be any positive integer which is relatively prime to and
. Let be any permutation polynomials over
is an invertible linear map over
and . In this paper,
we prove that, for suitable and , the map
could be -regular complete permutation polynomials over quadratic extension
fields.Comment: 10 pages. arXiv admin note: substantial text overlap with
arXiv:2212.1286
Coupling vibration characteristics of a translating flexible robot manipulator with harmonic driving motions
Translating robot manipulators (TRMs) especially flexible translating robot manipulators (FTRMs) have been actively used in takeout robots, beam-type substrate transport robots and manufacturing machines and it remains that the end-effector on robot arms should have a good operating accuracy. Due to the coupling effect, such as motor parameters and mechanism inertias, the motions of the driving stage exhibits certain disturbances especially in high speeds. Considering the influence of the motion disturbances, this paper models the motions of the driving stage as harmonic driving motions and in this case the FTRM is similar to a parametrically excited system. The multiple scales method is applied to obtain the stability conditions for the motion disturbances. Based on the established coupling dynamic model, the influences of the motion disturbances on the vibration behaviors and the stability are investigated. Moreover, considering the actual motion characteristics of the driving stage with varied accelerations and velocities, the effect mechanism between the motion characteristics and motion disturbances are subsequently studied. According to this effect mechanism, the influence of the motion disturbances can be suppressed through motion optimizing, which is meaningful for motion optimizations and vibration controls of the FTRM. An ADAMS physical prototype is constructed to verify the dynamic model and theoretical analysis results, and the results have a good agreement
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Imaging the Centromedian Thalamic Nucleus Using Quantitative Susceptibility Mapping.
The centromedian (CM) nucleus is an intralaminar thalamic nucleus that is considered as a potentially effective target of deep brain stimulation (DBS) and ablative surgeries for the treatment of multiple neurological and psychiatric disorders. However, the structure of CM is invisible on the standard T1- and T2-weighted (T1w and T2w) magnetic resonance images, which hamper it as a direct DBS target for clinical applications. The purpose of the current study is to demonstrate the use of quantitative susceptibility mapping (QSM) technique to image the CM within the thalamic region. Twelve patients with Parkinson's disease, dystonia, or schizophrenia were included in this study. A 3D multi-echo gradient recalled echo (GRE) sequence was acquired together with T1w and T2w images on a 3-T MR scanner. The QSM image was reconstructed from the GRE phase data. Direct visual inspection of the CM was made on T1w, T2w, and QSM images. Furthermore, the contrast-to-noise ratios (CNRs) of the CM to the adjacent posterior part of thalamus on T1w, T2w, and QSM images were compared using the one-way analysis of variance (ANOVA) test. QSM dramatically improved the visualization of the CM nucleus. Clear delineation of CM compared to the surroundings was observed on QSM but not on T1w and T2w images. Statistical analysis showed that the CNR on QSM was significantly higher than those on T1w and T2w images. Taken together, our results indicate that QSM is a promising technique for improving the visualization of CM as a direct targeting for DBS surgery
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