المؤلفون: Zhao, Lulu, Zeng, Weihao, Shi, Xiaofeng, Zhou, Hua, Hao, Donglin, Lin, Yonghua

مصطلحات موضوعية: Computer Science - Computation and Language, Computer Science - Artificial Intelligence

الوصف: Recently, both closed-source LLMs and open-source communities have made significant strides, outperforming humans in various general domains. However, their performance in specific professional fields such as medicine, especially within the open-source community, remains suboptimal due to the complexity of medical knowledge. We propose Aquila-Med, a bilingual medical LLM based on Aquila, addressing these challenges through continue pre-training, supervised fine-tuning (SFT), and reinforcement learning from human feedback (RLHF). We construct a large-scale Chinese and English medical dataset for continue pre-training and a high-quality SFT dataset, covering extensive medical specialties. Additionally, we develop a high-quality Direct Preference Optimization (DPO) dataset for further alignment. Aquila-Med achieves notable results across single-turn, multi-turn dialogues, and medical multiple-choice questions, demonstrating the effectiveness of our approach. We open-source the datasets and the entire training process, contributing valuable resources to the research community. Our models and datasets will released at https://huggingface.co/BAAI/AquilaMed-RL.

URL الوصول: http://arxiv.org/abs/2406.12182

المؤلفون: Cheng, Long, Bao, Mingrui, Zhang, Jingxian, Zhang, Xue, Yang, Qun, Li, Qiang, Cao, Hui, Qiu, Dawei, Liu, Jia, Ye, Fei, Wang, Qing, Liang, Genhao, Li, Hui, Cheng, Guanglei, Zhou, Hua, Zuo, Jian-Min, Zhou, Xiaodong, Shen, Jian, Zhu, Zhifeng, Mu, Sai, Wang, Wenbo, Zhai, Xiaofang

مصطلحات موضوعية: Condensed Matter - Materials Science

الوصف: Chirality in solid-state materials has sparked significant interest due to potential applications of topologically-protected chiral states in next-generation information technology. The electrical magneto-chiral effect (eMChE), arising from relativistic spin-orbit interactions, shows great promise for developing chiral materials and devices for electronic integration. Here we demonstrate an angle-resolved eMChE in an A-B-C-C type atomic-layer superlattice lacking time and space inversion symmetry. We observe non-superimposable enantiomers of left-handed and right-handed tilted uniaxial magnetic anisotropy as the sample rotates under static fields, with the tilting angle reaching a striking 45 degree. Magnetic force microscopy and atomistic simulations correlate the tilt to the emergence and evolution of chiral spin textures. The Dzyaloshinskii-Moriya interaction lock effect in competition with Zeeman effect is demonstrated to be responsible for the angle-resolved eMChE. Our findings open up a new horizon for engineering angle-resolved magneto-chiral anisotropy, shedding light on the development of novel angle-resolved sensing or writing techniques in chiral spintronics.

URL الوصول: http://arxiv.org/abs/2404.13396

المؤلفون: Yan, Jiang, Wu, Xing-Gang, Zhou, Hua, Li, Hong-Tai, Shan, Jing-Hao

مصطلحات موضوعية: High Energy Physics - Phenomenology

الوصف: In this paper, we analyze the top-quark decay $t\to Wb$ up to next-to-next-to-next-to-leading order (N$^{3}$LO) QCD corrections. For the purpose, we first adopt the principle of maximum conformality (PMC) to deal with the initial pQCD series. Then we adopt the Bayesian analysis approach, which quantifies the unknown higher-order terms' contributions in terms of a probability distribution, to estimate the possible magnitude of the uncalculated N$^{4}$LO-terms. In our calculation, an effective strong coupling constant $\alpha_{s}(Q_{*})$ is determined by using all non-conformal $\{\beta_{i}\}$ terms associated with the renormalization group equation. This leads to a next-to-leading-log PMC scale $Q_{*}^{(\rm NLL)}=10.3048$ GeV, which can be regarded as the correct momentum flow of the process. Consequently, we obtain an improved scale-invariant pQCD prediction for the top-quark decay width, e.g. $\Gamma_{t}^{\rm tot} = 1.3120 \pm 0.0038$ GeV, whose error is the squared average of the uncertainties from the decay width of $W$-boson $\Delta \Gamma_{W} = \pm 0.042$ GeV, the coupling constant $\Delta \alpha_{s}(m_{Z}) = \pm 0.0009$, and the predicted N$^{4}$LO-terms. The magnitude of the top-quark pole mass greatly affects the total decay width. By further taking the PDG top-quark pole mass error from cross-section measurements into consideration, e.g. $\Delta m_{t} = \pm 0.7$ GeV, we obtain $\Gamma_{t}^{\rm tot} = 1.3120 ^{+0.0194}_{-0.0192}$ GeV.
Comment: 9 pages, 4 figures

URL الوصول: http://arxiv.org/abs/2404.11133

المؤلفون: Sun, Sichao, Yang, Jiale, Hu, Jingwen, Zhou, Hua

المصدر: 2023 9th International Conference on Fluid Power and Mechatronics (FPM) Fluid Power and Mechatronics (FPM), 2023 9th International Conference on. :1-6 Aug, 2023

Relation: 2023 9th International Conference on Fluid Power and Mechatronics (FPM)

المؤلفون: Sun, Sichao, Yang, Jiale, Hu, Jingwen, Zhou, Hua

المصدر: 2023 9th International Conference on Fluid Power and Mechatronics (FPM) Fluid Power and Mechatronics (FPM), 2023 9th International Conference on. :1-7 Aug, 2023

Relation: 2023 9th International Conference on Fluid Power and Mechatronics (FPM)

المؤلفون: Bi, Changbing, Tian, Youliang, Li, Ta, Wu, Shihong, Zhou, Hua

المصدر: 2023 International Conference on Networking and Network Applications (NaNA) NANA Networking and Network Applications (NaNA), 2023 International Conference on. :649-654 Aug, 2023

Relation: 2023 International Conference on Networking and Network Applications (NaNA)

المؤلفون: Zhou, Hua, Wang, Yuanhui, E, Jiyang, Wang, Xiaole

المصدر: OCEANS 2023 - Limerick. :1-6 Jun, 2023

Relation: OCEANS 2023 - Limerick

المؤلفون: Zhang, Di, Harmon, Katherine J., Zachman, Michael J., Lu, Ping, Kim, Doyun, Zhang, Zhan, Cucciniello, Nickolas, Markland, Reid, Ssennyimba, Ken William, Zhou, Hua, Cao, Yue, Brahlek, Matthew, Zheng, Hao, Schneider, Matthew M., Mazza, Alessandro R., Hughes, Zach, Somodi, Chase, Freiman, Benjamin, Pooley, Sarah, Kunwar, Sundar, Roy, Pinku, Tu, Qing, McCabe, Rodney J., Chen, Aiping

مصطلحات موضوعية: Condensed Matter - Materials Science

الوصف: Developing novel lead-free ferroelectric materials is crucial for next-generation microelectronic technologies that are energy efficient and environment friendly. However, materials discovery and property optimization are typically time-consuming due to the limited throughput of traditional synthesis methods. In this work, we use a high-throughput combinatorial synthesis approach to fabricate lead-free ferroelectric superlattices and solid solutions of (Ba0.7Ca0.3)TiO3 (BCT) and Ba(Zr0.2Ti0.8)O3 (BZT) phases with continuous variation of composition and layer thickness. High-resolution X-ray diffraction (XRD) and analytical scanning transmission electron microscopy (STEM) demonstrate high film quality and well-controlled compositional gradients. Ferroelectric and dielectric property measurements identify the optimal property point achieved at the morphotropic phase boundary (MPB) with a composition of 48BZT-52BCT. Displacement vector maps reveal that ferroelectric domain sizes are tunable by varying {BCT-BZT}N superlattice geometry. This high-throughput synthesis approach can be applied to many other material systems to expedite new materials discovery and properties optimization, allowing for the exploration of a large area of phase space within a single growth.
Comment: submitted

URL الوصول: http://arxiv.org/abs/2312.17715

المؤلفون: Yan, Jiang, Wu, Xing-Gang, Wu, Zhi-Fei, Shan, Jing-Hao, Zhou, Hua

مصطلحات موضوعية: High Energy Physics - Phenomenology

الوصف: In this paper, we present an improved analysis of the top-quark pair production via the process $e^{+}e^{-}\to \gamma^{*}\to t\bar{t}$ near the threshold region up to next-to-next-to-next-to-leading order (N$^3$LO) QCD corrections. Near the threshold region, the top-quark velocity $v$ tends to zero, leading to Coulomb singularity. To achieve a reasonable prediction in the threshold region, we reconstruct the analytical expression for the Coulomb-terms up to N$^{3}$LO accuracy by using the PSLQ algorithm, whose numerical values agree well with the previous N$^3$LO-level calculations. It is found that the N$^{3}$LO series still has sizable renormalization scale dependence, and to improve the precision of the series, we apply the Principle of Maximum Conformality to eliminate such scale dependence. After that, the Coulomb part is resummed into a Sommerfeld-Gamow-Sakharov factor, which finally leads to a much more reasonable behavior near the threshold region.
Comment: 10 pages, 6 figures

URL الوصول: http://arxiv.org/abs/2312.15442

المؤلفون: Andersen, Jens O., Kjøllesdal, Martin, Yu, Qing, Zhou, Hua

مصطلحات موضوعية: High Energy Physics - Phenomenology, Condensed Matter - Quantum Gases, High Energy Physics - Lattice

الوصف: We present recent results in three-flavor chiral perturbation theory at finite isospin $\mu_I$ and strangeness $\mu_s$ chemical potentials at zero temperature. The phase diagram to ${\cal O}(p^2)$ in the $\mu_I$--$\mu_S$ plane is mapped out with and without electromagnetic effects. The phase diagram consists of a vacuum phase and three Bose-condensed phases with condensates of $\pi^{\pm}$, $K^{\pm}$, and $K^{0}/\bar{K}^0$, respectively. Including electromagnetic interactions, the Bose-condensed phases become Higgs phases via the Higgs mechanism. The tree-level spectrum for the mesons and gauge bosons is also derived. We calculate the pressure, energy density, isospin density, and speed of sound in the pion-condensed phase to ${\cal O}(p^4)$ for three-flavor $\chi$PT. The results are compared with recent lattice simulations and the agreement is very good for isospin chemical potentials up to approximately 200 MeV. Moreover, by integrating out the $s$-quark, we show that the thermodynamic quantities can be mapped onto their two-flavor counterparts with renormalized parameters. %to ${\cal O}(p^6)$ for two-flavor $\chi$PT in the chiral limit. We also consider the nonrelativistic limit. It is shown that the energy density can be matched onto the classic result by Lee, Huang and Yang (LHY) for a dilute Bose, with an $s$-wave scattering length that includes radiative corrections. The breaking of the $U(1)$ symmetry in the Bose-condensed phases gives rise to a Goldstone bosons, whose dispersion is linear for momenta $p\ll\mu_I$. In this regime, we use Son's prescription to construct an effective theory for the Goldstone field which is valid in this regime. It is shown that its damping rate is of order $p^5$. This result is in agreement with Beliav's for a dilute Bose gas.
Comment: 45 pages and 7 figures

URL الوصول: http://arxiv.org/abs/2312.13092