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DGS AT1M-11型海洋重力仪在东北印度洋的应用与研究
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作者 王星月 毛华斌 +3 位作者 戚永锋 邢焕林 余凌晖 李先鹏 《热带海洋学报》 北大核心 2026年第1期168-177,共10页
开展海洋区域重力场研究对理解海洋动力过程、海底地质构造及全球气候变化具有重要意义。高精度海洋重力勘探技术成为目前海洋重力场调查的发展趋势。中国科学院南海海洋研究所“实验6”科考船配备了DGS AT1M-11型海洋重力仪,该重力仪... 开展海洋区域重力场研究对理解海洋动力过程、海底地质构造及全球气候变化具有重要意义。高精度海洋重力勘探技术成为目前海洋重力场调查的发展趋势。中国科学院南海海洋研究所“实验6”科考船配备了DGS AT1M-11型海洋重力仪,该重力仪具有高精度、高可靠性、可全局动态测量的特点。在该重力仪开始使用之前,对其进行了精度评估,包括静态测试、内符合精度测试,结果均符合海洋调查测量规范的要求。利用2022年在东北印度洋采集的实测数据与重力恢复及气候试验(gravity recovery and climate experiment,GRACE)重力场数据相对比,其结果呈现出基本一致的趋势,且该航次的航前航后基准测试与重力交点差结果分别为-0.73mGal与1.15mGal,表明该仪器数据具有较高准确性,可用于高精度海洋重力测量。10°S以北90°E海岭重力场与水深不成比例,说明地壳厚度的均衡补偿存在差异,海岭由非均质性的物质组成。通过对实测数据所获得的自由空间重力异常进行反演,结果表明在90°E海岭之下存在与地形起伏载荷补偿相关的增厚地壳。 展开更多
关键词 dgS AT1M-11型海洋重力仪 90°E海岭 东北印度洋 重力模拟 “实验6”科考船
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Optimizing basis wave functions in the generator coordinate method for microscopic cluster models (Ⅰ)
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作者 Yi‑Fan Liu Bo Zhou Yu‑Gang Ma 《Nuclear Science and Techniques》 2025年第10期183-191,共9页
We employed random distributions and gradient descent methods for the Generator Coordinate Method(GCM)to identify effective basis wave functions,taking halo nuclei ^(6)He and ^(6)Li as examples.By comparing the ground... We employed random distributions and gradient descent methods for the Generator Coordinate Method(GCM)to identify effective basis wave functions,taking halo nuclei ^(6)He and ^(6)Li as examples.By comparing the ground state(0^(+))energy of ^(6)He and the excited state(0^(+))energy of 6 Li calculated with various random distributions and manually selected generation coordinates,we found that the heavy tail characteristic of the logistic distribution better describes the features of the halo nuclei.Subsequently,the Adam algorithm from machine learning was applied to optimize the basis wave functions,indicating that a limited number of basis wave functions can approximate the converged values.These results offer some empirical insights for selecting basis wave functions and contribute to the broader application of machine learning methods in predicting effective basis wave functions. 展开更多
关键词 generator Coordinate Method Effective basis wave functions Nuclear cluster model Machine learning Halo nuclei
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大古(DG)水电站戽池尾坎优化试验研究
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作者 杨帆 嘎玛次珠 +2 位作者 张文远 任炜辰 王若兰 《水利与建筑工程学报》 2025年第5期25-30,共6页
大古(DG)水电站建成运行后下游尾水较高而戽池尾坎高度较低,戽池检修时需修建的挡水围堰成本较高且是临时工程。提高戽池尾坎高度兼做检修挡水围堰是方便戽池检修及降低检修成本的有效解决途径。为分析戽式消力池尾坎加高方案的可行性,... 大古(DG)水电站建成运行后下游尾水较高而戽池尾坎高度较低,戽池检修时需修建的挡水围堰成本较高且是临时工程。提高戽池尾坎高度兼做检修挡水围堰是方便戽池检修及降低检修成本的有效解决途径。为分析戽式消力池尾坎加高方案的可行性,通过1∶60的水工模型对DG水电站戽池尾坎加高优化方案的水力特性进行系统研究。研究内容包括对不同戽池尾坎加高体型及高度,戽池内的水流流态、水面线、动水压强分布、流速分布等。试验结果表明:两种尾坎加高体型在相同尾坎加高高程条件下,沿原1∶2坡度加高尾坎方案戽池尾坎处水位壅高幅度相对较低,坎后水面跌落幅度更小,水流条件明显优于尾坎直立加高方案。综合考虑工程造价和兼顾下游电站建成后尾坎既能满足戽池检修挡水的需要又对现有电站的安全运行不造成明显影响等因素影响,确定沿原1∶2坡度将尾坎高程由3360.0m加高尾坎至3369.0 m高程方案是可行的。 展开更多
关键词 dg水电站 戽式消力池 X型宽尾墩 水力特性 模型试验
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Optimal Placement of Multi DG Units Including Different Load Models Using PSO
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作者 Amany M. El-Zonkol 《Smart Grid and Renewable Energy》 2010年第3期160-171,共12页
This paper proposes a multi-objective index-based approach to optimally determine the size and location of multi-distributed generators (DG) units in distribution system with different load models. It is shown that lo... This paper proposes a multi-objective index-based approach to optimally determine the size and location of multi-distributed generators (DG) units in distribution system with different load models. It is shown that load models can significantly affect the optimal location and sizing of DG resources in distribution systems. The proposed multi-objective function to be optimized includes a short circuit level parameter to represent the protective device requirements. The proposed function also considers a wide range of technical issues such as active and reactive power losses of the system, the voltage profile, the line loading and the MVA intake by the grid. The optimization technique based on particle swarm optimization (PSO) is introduced. The analysis of continuation power flow to determine the effect of DG units on the most sensitive buses to voltage collapse is carried out. The proposed algorithm is tested using the 38-bus radial system and the IEEE 30-bus meshed system. The results show the effectiveness of the proposed algorithm. 展开更多
关键词 Particle SWARM Optimization (PSO) Optimal PLACEMENT Distributed Generation (dg) Load models Impact Indices SHORT Circuit Level Voltage Stability
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Large language models for robotics:Opportunities,challenges,and perspectives 被引量:5
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作者 Jiaqi Wang Enze Shi +7 位作者 Huawen Hu Chong Ma Yiheng Liu Xuhui Wang Yincheng Yao Xuan Liu Bao Ge Shu Zhang 《Journal of Automation and Intelligence》 2025年第1期52-64,共13页
Large language models(LLMs)have undergone significant expansion and have been increasingly integrated across various domains.Notably,in the realm of robot task planning,LLMs harness their advanced reasoning and langua... Large language models(LLMs)have undergone significant expansion and have been increasingly integrated across various domains.Notably,in the realm of robot task planning,LLMs harness their advanced reasoning and language comprehension capabilities to formulate precise and efficient action plans based on natural language instructions.However,for embodied tasks,where robots interact with complex environments,textonly LLMs often face challenges due to a lack of compatibility with robotic visual perception.This study provides a comprehensive overview of the emerging integration of LLMs and multimodal LLMs into various robotic tasks.Additionally,we propose a framework that utilizes multimodal GPT-4V to enhance embodied task planning through the combination of natural language instructions and robot visual perceptions.Our results,based on diverse datasets,indicate that GPT-4V effectively enhances robot performance in embodied tasks.This extensive survey and evaluation of LLMs and multimodal LLMs across a variety of robotic tasks enriches the understanding of LLM-centric embodied intelligence and provides forward-looking insights towards bridging the gap in Human-Robot-Environment interaction. 展开更多
关键词 Large language models ROBOTICS Generative AI Embodied intelligence
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CPDGA:基于一致性传播的DGA域名主动检测算法 被引量:1
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作者 刘双双 王志 +1 位作者 董伊萌 李万鹏 《通信学报》 北大核心 2025年第6期18-31,共14页
攻击者通过域名生成算法(DGA)动态注册域名以支持恶意软件活动,恶意域名不断演化导致概念漂移现象,使得现有依赖可持续性学习模型的检测技术时效性不足。针对这一威胁,结合一致性预测与一致性聚类方法,提出了一种基于一致性传播的DGA域... 攻击者通过域名生成算法(DGA)动态注册域名以支持恶意软件活动,恶意域名不断演化导致概念漂移现象,使得现有依赖可持续性学习模型的检测技术时效性不足。针对这一威胁,结合一致性预测与一致性聚类方法,提出了一种基于一致性传播的DGA域名主动检测算法(CPDGA)。通过对2019—2023年恶意与良性域名数据集进行实验,证明CPDGA能够有效缓解概念漂移对机器学习检测模型性能的影响,并使检测准确率提升20.4%。此外,CPDGA在检测13种最新对抗模型生成域名时取得了96.42%的准确率,展现了强大的鲁棒性与适应性。 展开更多
关键词 域名生成算法 概念漂移 一致性预测 一致性聚类 对抗模型
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YOLOv8-DG:基于YOLOv8s改进的草莓成熟度检测模型
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作者 杨滨硕 狄巨星 杨阳 《长江信息通信》 2025年第1期82-86,共5页
针对自然环境下的红熟期草莓,为实现其成熟度的高效检测,提出一种基于YOLOv8s改进的草莓成熟度检测模型:YOLOv8-DG。以YOLOv8s模型为基础,在C2f模块中引入DCNv2(Deformable Convolution v2)结构,提高了模型的鲁棒性和对特征的辨别性,并... 针对自然环境下的红熟期草莓,为实现其成熟度的高效检测,提出一种基于YOLOv8s改进的草莓成熟度检测模型:YOLOv8-DG。以YOLOv8s模型为基础,在C2f模块中引入DCNv2(Deformable Convolution v2)结构,提高了模型的鲁棒性和对特征的辨别性,并将损失函数替换为GIoU,提高模型收敛速度,从而提高模型的性能。实验结果表明,YOLOv8-DG模型GFLOPS仅有27.6,相比原YOLOv8s模型减少3%;且平均精确度较原YOLOv8s模型提高2.1个百分点。改进后模型相较当前主流YOLO系列模型,平均精度等指标均有所提升,基本可以满足自然环境下的草莓成熟度检测。 展开更多
关键词 YOLOv8s YOLOv8-dg DCNv2 模型收敛速度
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基于UnifiedGesture改进模型的三维人体动画生成 被引量:1
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作者 郭二伟 朱欣娟 高全力 《计算机系统应用》 2025年第3期40-50,共11页
为了提升音频驱动人体动画生成的真实性,对UnifiedGesture模型进行了改进研究.首先,通过引入编码器-解码器架构,从音频中提取面部特征,以弥补原模型在面部表情生成方面的不足.其次,结合交叉局部注意力机制和基于Transformer-XL的多头注... 为了提升音频驱动人体动画生成的真实性,对UnifiedGesture模型进行了改进研究.首先,通过引入编码器-解码器架构,从音频中提取面部特征,以弥补原模型在面部表情生成方面的不足.其次,结合交叉局部注意力机制和基于Transformer-XL的多头注意力机制,以增强长序列中的时序依赖性.同时,利用变分量化自动编码器(vector quantized variational autoencoder,VQVAE),融合生成全身运动序列,以提升生成动作的多样性和完整性.最后,在BEAT数据集上进行实验,通过定量和定性分析结果表明,改进后的UnifiedGesture-F模型在音频与人体动作同步性和整体真实感方面相比原模型有显著提升. 展开更多
关键词 音频驱动 人体动画生成技术 Unifiedgesture模型 VQVAE
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New insights on generalized heat conduction and thermoelastic coupling models
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作者 Yue HUANG Lei YAN +1 位作者 Hua WU Yajun YU 《Applied Mathematics and Mechanics(English Edition)》 2025年第8期1533-1550,共18页
With the miniaturization of devices and the development of modern heating technologies,the generalization of heat conduction and thermoelastic coupling has become crucial,effectively emulating the thermodynamic behavi... With the miniaturization of devices and the development of modern heating technologies,the generalization of heat conduction and thermoelastic coupling has become crucial,effectively emulating the thermodynamic behavior of materials in ultrashort time scales.Theoretically,generalized heat conductive models are considered in this work.By analogy with mechanical viscoelastic models,this paper further enriches the heat conduction models and gives their one-dimensional physical expression.Numerically,the transient thermoelastic response of the slim strip material under thermal shock is investigated by applying the proposed models.First,the analytical solution in the Laplace domain is obtained by the Laplace transform.Then,the numerical results of the transient responses are obtained by the numerical inverse Laplace transform.Finally,the transient responses of different models are analyzed and compared,and the effects of material parameters are discussed.This work not only opens up new research perspectives on generalized heat conductive and thermoelastic coupling theories,but also is expected to be beneficial for the deeper understanding of the heat wave theory. 展开更多
关键词 generalized heat conduction thermoelastic coupling transient response generalized Cattaneo-Vernotte(CV)model generalized Green-Naghdi(GN)model
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EdgeAIGC:Model caching and resource allocation for edge artificial intelligence generated content
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作者 Wu Wen Yibin Huang +3 位作者 Xinxin Zhao Peiying Zhang Kai Liu Guowei Shi 《Digital Communications and Networks》 2025年第6期1941-1950,共10页
With the rapid development of generative artificial intelligence technology,the traditional cloud-based centralized model training and inference face significant limitations due to high transmission latency and costs,... With the rapid development of generative artificial intelligence technology,the traditional cloud-based centralized model training and inference face significant limitations due to high transmission latency and costs,which restrict user-side in-situ Artificial Intelligence Generated Content(AIGC)service requests.To this end,we propose the Edge Artificial Intelligence Generated Content(Edge AIGC)framework,which can effectively address the challenges of cloud computing by implementing in-situ processing of services close to the data source through edge computing.However,AIGC models usually have a large parameter scale and complex computing requirements,which poses a huge challenge to the storage and computing resources of edge devices.This paper focuses on the edge intelligence model caching and resource allocation problems in the Edge AIGC framework,aiming to improve the cache hit rate and resource utilization of edge devices for models by optimizing the model caching strategy and resource allocation scheme,and realize in-situ AIGC service processing.With the optimization objectives of minimizing service request response time and execution cost in resource-constrained environments,we employ the Twin Delayed Deep Deterministic Policy Gradient algorithm for optimization.Experimental results show that,compared with other methods,our model caching and resource allocation strategies can effectively improve the cache hit rate by at least 41.06%and reduce the response cost as well. 展开更多
关键词 Generative AI Edge model caching Resource allocation Edge intelligence
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Combining transformer and 3DCNN models to achieve co-design of structures and sequences of antibodies in a diffusional manner
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作者 Yue Hu Feng Tao +3 位作者 Jiajie Xu Wen-Jun Lan Jing Zhang Wei Lan 《Journal of Pharmaceutical Analysis》 2025年第6期1406-1408,共3页
AlphaPanda(AlphaFold2[1]inspired protein-specific antibody design in a diffusional manner)is an advanced algorithm for designing complementary determining regions(CDRs)of the antibody targeted the specific epitope,com... AlphaPanda(AlphaFold2[1]inspired protein-specific antibody design in a diffusional manner)is an advanced algorithm for designing complementary determining regions(CDRs)of the antibody targeted the specific epitope,combining transformer[2]models,3DCNN[3],and diffusion[4]generative models. 展开更多
关键词 advanced algorithm diffusion generative models dcnn epitope targeting antibody design complementary determining regions complementary determining regions cdrs transformer models
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Device Activity Detection and Channel Estimation Using Score-Based Generative Models in Massive MIMO
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作者 TANG Chenyue LI Zeshen +1 位作者 CHEN Zihan Howard H.YANG 《ZTE Communications》 2025年第1期53-62,共10页
The growing demand for wireless connectivity has made massive multiple-input multiple-output(MIMO)a cornerstone of modern communication systems.To optimize network performance and resource allocation,an efficient and ... The growing demand for wireless connectivity has made massive multiple-input multiple-output(MIMO)a cornerstone of modern communication systems.To optimize network performance and resource allocation,an efficient and robust approach is joint device activity detection and channel estimation.In this paper,we present an approach utilizing score-based generative models to address the underdetermined nature of channel estimation,which is data-driven and well-suited for the complex and dynamic environment of massive MIMO systems.Our experimental results,based on a comprehensive dataset generated through Monte-Carlo sampling,demonstrate the high precision of our channel estimation approach,with errors reduced to as low as-45 d B,and exceptional accuracy in detecting active devices. 展开更多
关键词 activity detection channel estimation inverse problem score-based generative model massive MIMO
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A Critical Review of Methods and Challenges in Large Language Models
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作者 Milad Moradi Ke Yan +2 位作者 David Colwell Matthias Samwald Rhona Asgari 《Computers, Materials & Continua》 2025年第2期1681-1698,共18页
This critical review provides an in-depth analysis of Large Language Models(LLMs),encompassing their foundational principles,diverse applications,and advanced training methodologies.We critically examine the evolution... This critical review provides an in-depth analysis of Large Language Models(LLMs),encompassing their foundational principles,diverse applications,and advanced training methodologies.We critically examine the evolution from Recurrent Neural Networks(RNNs)to Transformer models,highlighting the significant advancements and innovations in LLM architectures.The review explores state-of-the-art techniques such as in-context learning and various fine-tuning approaches,with an emphasis on optimizing parameter efficiency.We also discuss methods for aligning LLMs with human preferences,including reinforcement learning frameworks and human feedback mechanisms.The emerging technique of retrieval-augmented generation,which integrates external knowledge into LLMs,is also evaluated.Additionally,we address the ethical considerations of deploying LLMs,stressing the importance of responsible and mindful application.By identifying current gaps and suggesting future research directions,this review provides a comprehensive and critical overview of the present state and potential advancements in LLMs.This work serves as an insightful guide for researchers and practitioners in artificial intelligence,offering a unified perspective on the strengths,limitations,and future prospects of LLMs. 展开更多
关键词 Large language models artificial intelligence natural language processing machine learning generative artificial intelligence
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Large language models in traditional Chinese medicine: a systematic review
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作者 Zhe Chen Hui Wang +5 位作者 Chengxian Li Chunxiang Liu Fengwen Yang Dong Zhang Alice Josephine Fauci Junhua Zhang 《Acupuncture and Herbal Medicine》 2025年第1期57-67,共11页
Objective:Generative artificial intelligence(AI)technology,represented by large language models(LLMs),has gradually been developed for traditional Chinese medicine(TCM);however,challenges remain in effectively enhanci... Objective:Generative artificial intelligence(AI)technology,represented by large language models(LLMs),has gradually been developed for traditional Chinese medicine(TCM);however,challenges remain in effectively enhancing AI applications for TCM.Therefore,this study is the first systematic review to analyze LLMs in TCM retrospectively,focusing on and summarizing the evidence of their performance in generative tasks.Methods:We extensively searched electronic databases for articles published until June 2024 to identify publicly available studies on LLMs in TCM.Two investigators independently selected and extracted the related information and evaluation metrics.Based on the available data,this study used descriptive analysis for a comprehensive systematic review of LLM technology related to TCM.Results:Ten studies published between 2023 and 2024 met our eligibility criteria and were included in this review,including 40%LLMs in the TCM vertical domain,40%containing TCM data,and 20%honoring the TCM contribution,with a foundational model parameter range from 1.8 to 33 billion.All included studies used manual or automatic evaluation metrics to evaluate model performance and fully discussed the challenges and contributions through an overview of LLMs in TCM.Conclusions:LLMs have achieved significant advantages in TCM applications and can effectively address intelligent TCM tasks.Further in-depth development of LLMs is needed in various vertical TCM fields,including clinical and fundamental research.Focusing on the functional segmentation development direction of generative AI technologies in TCM application scenarios to meet the practical needs-oriented demands of TCM digitalization is essential. 展开更多
关键词 Generative artificial intelligence Intelligence clinical applications Large language model Systematic review Traditional Chinese medicine
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Analysis of height and diameter growth patterns in Sakhalin fir seedlings competing with evergreen dwarf bamboo and deciduous vegetation using generalized additive models
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作者 Hisanori Harayama Takeshi Yamada +1 位作者 Mitsutoshi Kitao Ikutaro Tsuyama 《Journal of Forestry Research》 2025年第5期76-89,共14页
The growth of Sakhalin fir(Abies sachalinen-sis)seedlings,an important forest tree species in northern Hokkaido,Japan,is significantly affected by competition from surrounding vegetation,especially evergreen dwarf bam... The growth of Sakhalin fir(Abies sachalinen-sis)seedlings,an important forest tree species in northern Hokkaido,Japan,is significantly affected by competition from surrounding vegetation,especially evergreen dwarf bamboo.In this study,we investigated the height and root collar diameter(RCD)growth of Sakhalin fir seedlings under various degrees of cover by deciduous vegetation and evergreen dwarf bamboo.Generalized additive models were used to quantify the effects of canopy cover and forest floor cover on the relative growth rates of these two parameters.The canopy cover of Sakhalin fir seedlings had a nonlin-ear negative effect on both the height growth of seedlings in the subsequent year and the RCD growth in the current year,given the general growth pattern in this species,where height growth ceases in early summer and RCD growth con-tinues until autumn.Height growth declined sharply after the canopy cover rate exceeded 50%,while RCD growth declined rapidly between 0 and 50%canopy cover rate.The forest floor cover had a greater negative impact on RCD growth than on height growth.These results suggested that Sakhalin fir seedlings respond to vegetative competition by prioritizing height growth for light acquisition at the expense of diameter growth and possibly root growth for below-ground competition.The cover of evergreen dwarf bamboo reduced the height growth of fir seedlings significantly more than the cover of deciduous vegetation.This difference is likely due to the timing of light availability.When competing with deciduous vegetation,Sakhalin fir seedlings exposed to light during the post-snow melt and early spring before the development of the deciduous vegetation canopy can photosynthesize more effectively,leading to greater height growth.The results of this study highlighted the importance of vegetation control considering the type of vegetation for successful Sakhalin fir reforestation.Adjusting the intensity and timing of weeding based on the presence and abundance of dwarf bamboo and other competing vegetation could potentially reduce weeding costs and increase biodiversity in reforested areas. 展开更多
关键词 Abies sachalinensis Competition Crown cover Forest floor cover Generalized additive models(GAM) Relative growth rate
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Quantum and Semiclassical Non-Hermitian Dicke Models without Nonreciprocity
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作者 Bin Jiang Yi-Yang Li +2 位作者 Jun-Jie Liu Chen Wang Jian-Hua Jiang 《Chinese Physics Letters》 2025年第12期96-114,共19页
The Dicke model,which describes the collective interaction between an ensemble of atoms and a single-mode photon field,serves as a fundamental framework for studying light-matter interactions and quantum electrodynami... The Dicke model,which describes the collective interaction between an ensemble of atoms and a single-mode photon field,serves as a fundamental framework for studying light-matter interactions and quantum electrodynamic phenomena.In this work,we investigate the manifestation of non-Hermitian effects in a generalized Dicke model,where two dissipative atom ensembles interact with a single-mode photon field.We explore the system in the semiclassical limit as a non-Hermitian Dicke model,revealing rich exceptional points(EPs)and diabolic points.Furthermore,we explore the quantum signature of EPs in the Hilbert space,relying on discrete photon numbers.The transition of photons from antibunching to bunching at steady state is unravelled.Our findings deepen the understanding of non-Hermitian physics in light-matter interaction,which is instructive for the design of advanced photonic devices. 展开更多
关键词 generalized dicke modelwhere light matter interaction dicke model exceptional points diabolic points dissipative atom ensembles non hermitian effects quantum electrodynamic
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Enhanced Panoramic Image Generation with GAN and CLIP Models
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作者 Shilong Li Qiang Zhao 《Journal of Beijing Institute of Technology》 2025年第1期91-101,共11页
Panoramic images, offering a 360-degree view, are essential in virtual reality(VR) and augmented reality(AR), enhancing realism with high-quality textures. However, acquiring complete and high-quality panoramic textur... Panoramic images, offering a 360-degree view, are essential in virtual reality(VR) and augmented reality(AR), enhancing realism with high-quality textures. However, acquiring complete and high-quality panoramic textures is challenging. This paper introduces a method using generative adversarial networks(GANs) and the contrastive language-image pretraining(CLIP) model to restore and control texture in panoramic images. The GAN model captures complex structures and maintains consistency, while CLIP enables fine-grained texture control via semantic text-image associations. GAN inversion optimizes latent codes for precise texture details. The resulting low dynamic range(LDR) images are converted to high dynamic range(HDR) using the Blender engine for seamless texture blending. Experimental results demonstrate the effectiveness and flexibility of this method in panoramic texture restoration and generation. 展开更多
关键词 panoramic images environment texture generative adversarial networks(GANs) contrastive language-image pretraining(CLIP)model blender engine fine-grained control texture generation
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融合DeepSeek-R1和RAG技术的先秦文化元典智能问答研究 被引量:5
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作者 张强 高颖 +2 位作者 任豆豆 韩牧哲 包平 《现代情报》 北大核心 2026年第1期173-186,共14页
[目的/意义]先秦文化元典是中华文明的源头文献,对其进行知识组织与智能应用,可以为建设中华民族现代文明提供历史依据和价值判断,增强国家文化软实力。本研究旨在基于检索增强生成(RAG)技术的先秦文化元典智能问答系统,推动相关知识的... [目的/意义]先秦文化元典是中华文明的源头文献,对其进行知识组织与智能应用,可以为建设中华民族现代文明提供历史依据和价值判断,增强国家文化软实力。本研究旨在基于检索增强生成(RAG)技术的先秦文化元典智能问答系统,推动相关知识的智能化应用与传承。[方法/过程]以中华书局出版的《春秋》三传为研究对象,构建先秦文化元典本体模型,采用DeepSeek-R1进行知识抽取并构建知识图谱。基于LangChain框架,运用GraphRAG、NaiveRAG、LightRAG、HybridRAG这4种RAG方法对大语言模型进行检索增强,并从定量和混合两方面评估问答能力。[结果/结论]研究结果显示,DeepSeek-R1抽取效果良好,生成的三元组能有效覆盖关键知识且质量较高。在智能问答评估中,不同RAG方法各有优劣。GraphRAG在各类问题和评估维度上表现较佳,尤其在考证溯源型、应用实践型等问题上表现突出;NaiveRAG在事实知识型问题上表现较好。综合定量与混合评估来看,根据实际应用场景选择合适的RAG技术至关重要。 展开更多
关键词 先秦文化元典 大语言模型 DeepSeek 检索增强生成 智能问答
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含随机出力的DG配电网可靠重构方法研究
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作者 李信杭 陈敏康 张莹 《自动化仪表》 2025年第12期41-46,共6页
针对配电网中接入分布式电源(DG)后存在的随机出力情况增加了配电网重构难度的问题,研究了多信息耦合下的含随机出力的DG配电网可靠重构方法。创新性地在潮流约束和多信息耦合约束条件下,采用混合型粒子群算法求解含随机出力的DG配电网... 针对配电网中接入分布式电源(DG)后存在的随机出力情况增加了配电网重构难度的问题,研究了多信息耦合下的含随机出力的DG配电网可靠重构方法。创新性地在潮流约束和多信息耦合约束条件下,采用混合型粒子群算法求解含随机出力的DG配电网重构模型,以获取配电网重构的最优解。快速搜索最优解,重构随机出力的DG配电网拓扑。试验结果表明:在迭代次数为40次时,目标函数为0.2 kW,达到最小值;配电网重构后多目标函数值比配电网重构前降低0.65 kW;节点31、32、33的电压标幺值提升0.055 p.u.。该方法的全局收敛性能高、配电网重构效率佳,适用于多种和单一DG配电网的重构。该方法可有效提升整个配电网中全部节点的电压值。 展开更多
关键词 配电网 分布式电源 多信息耦合 随机出力 可靠重构方法 混合型粒子群
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教师数字素养场景化研修:内涵框架、实践模式与生成式AI赋能策略机制 被引量:1
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作者 魏非 杨可欣 徐若愚 《中国电化教育》 北大核心 2026年第1期127-135,共9页
为破解传统教师研修模式在教育数字化转型背景下面临的真实场景割裂、智能支持薄弱等难题,该文从场景化研修内涵框架、实践模式以及AI赋能的策略与机制三个方面阐释了教师数字素养场景化研修及实现路径。场景化研修以经验学习理论与721... 为破解传统教师研修模式在教育数字化转型背景下面临的真实场景割裂、智能支持薄弱等难题,该文从场景化研修内涵框架、实践模式以及AI赋能的策略与机制三个方面阐释了教师数字素养场景化研修及实现路径。场景化研修以经验学习理论与721学习理论为基础,显著体现场景应用贯穿始终、理论与实践双循环、人机协同深化认知三个核心特征,并具备“认知激活→具身体验→反思抽象→主动实践”四个关键活动环节。依据场景化研修内涵框架,针对实践中教师数字素养发展的多样化需求,文章提出教学技术应用工坊、教学创新实验室、问题解决导向、实践共同体和基于微认证的自主学习五种典型实践模式。最后,提炼个性化场景生成、任务驱动、过程性反馈与TPACK融合等AI赋能策略,并构建了教师数字素养画像、支架智能生成与匹配、场景成效评估与动态更新三项AI赋能的核心机制,旨在形成数据驱动、动态生长的教师专业发展新范式。 展开更多
关键词 教师数字素养 场景化研修 生成式AI 实践模式 研修机制
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