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Algorithm for computing time correlation functions in non-stationary complex dynamic systems
《Chinese Physics B》2025年第3期77-83,共7页Jiu Zhang Lifu Jin Bo Zheng Xiongfei Jiang Tingting Chen Cong Xu Yanqing Hu 
Project supported by the Postdoctoral Fellowship Program of China Postdoctoral Science Foundation(Grant No.GZC20231050);the National Natural Science Foundation of China(Grant Nos.12175193 and 11905183);the 13th Five-year plan for Education Science Funding of Guangdong Province(Grant No.2021GXJK349)。
For non-stationary complex dynamic systems,a standardized algorithm is developed to compute time correlation functions,addressing the limitations of traditional methods reliant on the stationary assumption.The propose...
关键词：complex dynamic systems non-stationary states time correlation functions 
Non-stationary response of complex ecosystem service networks to urbanization:Evidence from a typical eco-fragile area in China
《Geography and Sustainability》2025年第1期170-184,共15页Zhen Shen Yang Gao Lei Wang Zheyi Xia Haowei Liu Ting Deng 
supported by the National Natural Science Foundation Projects of China(Grant No.42071284).
Understanding the complex interactions between urbanization and ecosystem services(ESs)is crucial for optimiz ing planning policies and achieving sustainable urban management.While previous research has largely focuse...
关键词：Ecosystem services URBANIZATION Network analysis Non-stationary fluctuation 
Hausdorff Measure of Space Anisotropic Gaussian Processes with Non-stationary Increments
《Acta Mathematicae Applicatae Sinica》2025年第1期114-132,共19页Jun WANG Zhen-long CHEN Wei-jie YUAN Guang-jun SHEN 
partially supported by National Natural Science Foundation of China(12371150,12071003);Natural Science Foundation of Anhui Polytechnic University(2022AH050955,2022YQQ025,Xjky2022163);Zhejiang Province Philosophy and Social Science Planning Routine Subject(24NDJC131YB).
Let X={X(t),t∈R+} be a centered space anisotropic Gaussian process values in R^(d) with non-stationary increments,whose components are independent but may not be identically distributed.Under certain conditions,then ...
关键词：Hausdorff measure self-similar Gaussian processes non-stationary increment Lamperti theorem 
Efficient simulation of spatially correlated non-stationary ground motions by wavelet-packet algorithm and spectral representation method
《Earthquake Engineering and Engineering Vibration》2024年第4期799-814,共16页Ji Kun Cao Xuyang Wang Suyang Wen Ruizhi 
National Key Research and Development Program of China under Grant No.2023YFE0102900;National Natural Science Foundation of China under Grant Nos.52378506 and 52208164。
Although the classical spectral representation method(SRM)has been widely used in the generation of spatially varying ground motions,there are still challenges in efficient simulation of the non-stationary stochastic ...
关键词：non-stationarity time-varying spectrum wavelet packet transform(WPT) spectral representation method(SRM) response spectrum spatially varying recordings 
A novel framework for predicting non-stationary production time series of shale gas based on BiLSTM-RF-MPA deep fusion model
《Petroleum Science》2024年第5期3326-3339,共14页Bin Liang Jiang Liu Li-Xia Kang Ke Jiang Jun-Yu You Hoonyoung Jeong Zhan Meng 
supported by Sichuan Natural Science Foundation (Grant No. 2023NSFSC0423);CNPC Innovation Found (Grant No. 2022DQ02-0207);Science and Technology Research Program of Chongqing Municipal Education Commission (KJQN202201510);supported by a grant from the Human Resources Development program (No. 20216110100070) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP);funded by the Ministry of Trade, Industry, and Energy of the Korean Government。
Shale gas, as an environmentally friendly fossil energy resource, has gained significant commercial development and shows immense potential. However, accurately predicting shale gas production faces substantial challe...
关键词：Production forecasting Shale gas BiLSTM-RF-MPA model Nonstationary production time series Deep learning 
A Non-Stationary Beam-Enabled Stochastic Channel Model and Characterization over Non-Reciprocal Beam Patterns
《China Communications》2024年第10期43-58,共16页Zhang Jiachi Liu Liu Tan Zhenhui Wang Kai Li Lu Zhou Tao 
supported by the National Key R&D Program of China under grant 2020YFB1804901;the National Natural Science Foundation of China under grant 62341102。
The multiple-input multiple-output(MIMO)-enabled beamforming technology offers great data rate and channel quality for next-generation communication.In this paper,we propose a beam channel model and enable it with tim...
关键词：beam channel model channel non-stationarity non-reciprocal beam patterns stochastic geometry 
Improving Optimal Fingerprinting Methods Requires a Viewpoint beyond Statistical Science
《Advances in Atmospheric Sciences》2024年第10期1869-1872,共4页Jianhua LU 
support from the National Natural Science Foundation of China(Grant No.42175070)。
While being successful in the detection and attribution of climate change,the optimal fingerprinting method(OFM)may have some limitations from a physics-and-dynamics-based viewpoint.Here,an analysis is made on the lin...
关键词：optimal fingerprinting detection and attribution NONLINEARITY interaction between climate change and variability non-stationary climate variability 
Adaptive cache policy optimization through deep reinforcement learning in dynamic cellular networks
《Intelligent and Converged Networks》2024年第2期81-99,共19页Ashvin Srinivasan Mohsen Amidzadeh Junshan Zhang Olav Tirkkonen 
We explore the use of caching both at the network edge and within User Equipment(UE)to alleviate traffic load of wireless networks.We develop a joint cache placement and delivery policy that maximizes the Quality of S...
关键词：wireless caching deep reinforcement learning advantageous actor critic long short term memory non-stationary Partial Observable Markov Decision Process(POMDP) 
Uniform Asymptotics for Finite-Time Ruin Probabilities of Risk Models with Non-Stationary Arrivals and Strongly Subexponential Claim Sizes
《Wuhan University Journal of Natural Sciences》2024年第1期21-28,共8页XU Chenghao WANG Kaiyong PENG Jiangyan 
Supported by the 333 High Level Talent Training Project of Jiangsu Province;the National Natural Science Foundation of China(71871046);Science and Technology Projects of Sichuan Province(2021YFQ0007)。
This paper considers the one-and two-dimensional risk models with a non-stationary claim-number process.Under the assumption that the claim-number process satisfies the large deviations principle,the uniform asymptoti...
关键词：one-dimensional risk model two-dimensional risk model large deviations principle finite-time ruin probability heavy-tailed distributions 
A Normalizing Field Flow Induced Two-Stage Stochastic Homogenization Method for Random Composite Materials被引量：1
《Communications in Computational Physics》2023年第8期787-812,共26页Zihao Yang Xintong Wang Xiaofei Guan Jizu Huang Xixin Wu 
supported by the National Natural Science Foundation of China grant(12131002,51739007,12271409);Strategic Priority Research Program of the Chinese Academy of Sciences(XDC06030101);the National Key R&D Program of China with the grant(2020YFA-0713603);Natural Science Foundation of Shanghai grant(21ZR1465800);the Interdisciplinary Project in Ocean Research of Tongji University and the Fundamental Research Funds for the Central Universities..
The traditional stochastic homogenization method can obtain homogenized solutions of elliptic problems with stationary random coefficients.However,many random composite materials in scientific and engineering computin...
关键词：Two-stage stochastic homogenization normalizing field flows multi-modes Monte Carlo method random composite materials non-stationary random 
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