3,628 research outputs found
The decay and the mixing
We study the and reactions, and pay attention to the different sources of isospin
violation and mixing of and resonances where these
resonances are dynamically generated from meson-meson interaction. We find that
the main reason of isospin violation is the isospin breaking in the meson-meson
transition matrices, and the other source is that the loops involving kaons
in the production mechanism provide a source of isospin violation because they
do not cancel by the different mass of the charged and neutral kaons. We obtain
a branching ratio for production of the order of .
Future experiments can address this problem and the production rate and shape
of the mass distribution will definitely help to better understand
the nature of scalar resonances.Comment: 12 pages, 4 figure
LLM-FuncMapper: Function Identification for Interpreting Complex Clauses in Building Codes via LLM
As a vital stage of automated rule checking (ARC), rule interpretation of
regulatory texts requires considerable effort. However, interpreting regulatory
clauses with implicit properties or complex computational logic is still
challenging due to the lack of domain knowledge and limited expressibility of
conventional logic representations. Thus, LLM-FuncMapper, an approach to
identifying predefined functions needed to interpret various regulatory clauses
based on the large language model (LLM), is proposed. First, by systematically
analysis of building codes, a series of atomic functions are defined to capture
shared computational logics of implicit properties and complex constraints,
creating a database of common blocks for interpreting regulatory clauses. Then,
a prompt template with the chain of thought is developed and further enhanced
with a classification-based tuning strategy, to enable common LLMs for
effective function identification. Finally, the proposed approach is validated
with statistical analysis, experiments, and proof of concept. Statistical
analysis reveals a long-tail distribution and high expressibility of the
developed function database, with which almost 100% of computer-processible
clauses can be interpreted and represented as computer-executable codes.
Experiments show that LLM-FuncMapper achieve promising results in identifying
relevant predefined functions for rule interpretation. Further proof of concept
in automated rule interpretation also demonstrates the possibility of
LLM-FuncMapper in interpreting complex regulatory clauses. To the best of our
knowledge, this study is the first attempt to introduce LLM for understanding
and interpreting complex regulatory clauses, which may shed light on further
adoption of LLM in the construction domain
decays into and \omega (\phi) \,''f_1(1420)''
We perform a theoretical study of the reactions with the assumption that the
is dynamically generated from a single channel
interaction in the chiral unitary approach. Two peaks in the
invariant mass distribution are observed, one clear peak locates at the
nominal mass, the other peak locates at around
with about width. We conclude that the former peak is associated
with the and the latter peak is not a genuine resonance but a
manifestation of the kinematic effect in the higher energy region caused by the
decay mode of the .Comment: 17 pages, 5 figures
A Wideband Printed Directional Antenna Array with Impedance Regulating Load
We proposed a broadband directional antenna array working at mobile communication frequency band, which achieves a relative bandwidth of 50.7%. This binary antenna array is fed by two branches of the balanced microstrip. To enhance the antenna bandwidth, we introduced a section of loading metal strip. The antenna prototype has a S11 lower than −10 dB within the 1.5 GHz to 2.52 GHz frequency band, particularly from 2.01 GHz to 2.50 GHz, the S11 is lower than −15 dB. The gain varies with relatively small variation within the working band, which is 5.4 dBi to 8.7 dBi
Adaptive Control of Resource Flow to Optimize Construction Work and Cash Flow via Online Deep Reinforcement Learning
Due to complexity and dynamics of construction work, resource, and cash
flows, poor management of them usually leads to time and cost overruns,
bankruptcy, even project failure. Existing approaches in construction failed to
achieve optimal control of resource flow in a dynamic environment with
uncertainty. Therefore, this paper introducess a model and method to adaptive
control the resource flows to optimize the work and cash flows of construction
projects. First, a mathematical model based on a partially observable Markov
decision process is established to formulate the complex interactions of
construction work, resource, and cash flows as well as uncertainty and
variability of diverse influence factors. Meanwhile, to efficiently find the
optimal solutions, a deep reinforcement learning (DRL) based method is
introduced to realize the continuous adaptive optimal control of labor and
material flows, thereby optimizing the work and cash flows. To assist the
training process of DRL, a simulator based on discrete event simulation is also
developed to mimic the dynamic features and external environments of a project.
Experiments in simulated scenarios illustrate that our method outperforms the
vanilla empirical method and genetic algorithm, possesses remarkable capability
in diverse projects and external environments, and a hybrid agent of DRL and
empirical method leads to the best result. This paper contributes to adaptive
control and optimization of coupled work, resource, and cash flows, and may
serve as a step stone for adopting DRL technology in construction project
management
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