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Curvature-enhanced multipartite coherence in the multiverse

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Chinese Physics C 2024年第7期48卷 259-272页

作者：吴树民王春旭王锐迪李金璇黄晓理曾浩生 Department of Physics Liaoning Normal UniversityDalian 116029China Department of Physics Hunan Normal UniversityChangsha 410081China

Here,we study the quantum coherence of N-partite Greenberger-Horne-Zeilinger(GHZ)and W states in the multiverse consisting of N causally disconnected de Sitter ***,N-partite coherence increases monotonically with curvature,whereas the curvature effect destroys quantum entanglement and discord,indicating that the curvature effect is beneficial to quantum coherence and harmful to quantum correlations in the *** find that with an increase in n expanding de Sitter spaces,the N-partite coherence of the GHZ state increases monotonically for any curvature,whereas the quantum coherence of the W state decreases or increases monotonically depending on the *** find a distribution relationship,which indicates that the correlated coherence of the N-partite W state is equal to the sum of all bipartite correlated coherence in the *** coherence exhibits unique properties in the multiverse,suggesting that it may provide some evidence for the existence of the multiverse.

关键词： multiverse curvature effect multipartite coherence

Quantum properties of fermionic fields in multi-event horizon spacetime

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Science China(Physics,Mechanics & Astronomy) 2023年第12期66卷 56-62页

作者： Qianqian Liu shu-min wu Cuihong Wen Jieci Wang Department of Physics Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of EducationSynergetic Innovation Center for Quantum Effects and ApplicationHunan Normal UniversityChangsha 410081China Department of Physics Liaoning Normal UniversityDalian 116029China

We investigated the properties of quantum entanglement and mutual information in the multi-event horizon Schwarzschild-de Sitter(Sd S)spacetime for massless Dirac *** the first time,we obtained the expression for the evolutions of the quantum state near the black hole event horizon(BEH)and cosmological event horizon(CEH)in the Sd S *** the Nariai limit,the physically accessible entanglement and mutual information are maximized,and the physically inaccessible correlations are *** the increase in temperature of either horizon,the physically accessible correlations experience ***,the initial state remains entangled and can be utilized in entanglement-based quantum information processing tasks,which differs from the scalar field ***,the degradation of physically accessible correlations is more pronounced for small-mass black *** contrast,the physically inaccessible correlations separated by the CEH monotonically increase with the radiation temperature,and such correlations are not decisively influenced by the effect of particle creation at the ***,a similar phenomenon is observed for the inaccessible correlations separated by the *** result differs from the single event spacetime,in which the physically inaccessible entanglement is a monotonic function of the Hawking temperature.

关键词： multi-event horizon spacetime Dirac field SdS spacetime quantum entanglement

Asymptotic normality of error density estimator in stationary and explosive autoregressive models

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Applied Mathematics(A Journal of Chinese Universities) 2024年第1期39卷 140-158页

作者： wu Shi-peng YANG Wen-zhi GAO min HU shu-he School of Mathematical Sciences&School of Big Data and Statistics Anhui UniversityHefei 230601China School of Statistics Shanxi University of Finance and EconomicsTaiyuan030006China

In this paper,we consider the limit distribution of the error density function estima-tor in the rst-order autoregressive models with negatively associated and positively associated random *** mild regularity assumptions,some asymptotic normality results of the residual density estimator are obtained when the autoregressive models are stationary process and explosive *** order to illustrate these results,some simulations such as con dence intervals and mean integrated square errors are provided in this *** shows that the residual density estimator can replace the density\estimator"which contains errors.

关键词： explosive autoregressive models residual density estimator asymptotic distribution association sequence

Concise extraction and characterization of the pore-throat network in unconventional hydrocarbon reservoirs: A new perspective

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Petroleum Science 2024年第3期21卷 1474-1487页

作者： shu-Heng Du Yong-min Shi State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing100190China School of Engineering Science University of Chinese Academy of SciencesBeijing100049China School of Earth and Space Sciences Peking UniversityBeijing100871China

In this study,a new image-based method for the extraction and characterization of pore-throat network for unconventional hydrocarbon storage and exploitation is proposed.“Pore-throat solidity”,which is analogous to particle solidity,and a new method for automatic identification of pores and throats in tight sandstone oil reservoirs are ***,the“pore-throat combination”and“pure pore”are defined and distinguished by drawing the cumulative probability curve of the pore-throat solidity and by selecting an appropriate cutoff *** the discrete grid set is recognized as a pore-throat combination,Legendre ellipse fitting and minimum Feret diameter are *** the pore and throat grid sets are identified as pure pores,the pore diameter can be directly *** the new method,the analytical results for the physical parameters and pore radius agree well with most prior *** results comparing the maximum ball and the new model could also prove the accuracy of the latter's in micro and nano *** new model provides a more practical theoretical basis and a new calculation method for the rapid and accurate evaluation of the complex processes of oil migration.

关键词： Hydrocarbon exploitation Pore Throat Porous media Identification

Design and Implementation of Nonlinear Precoding for MIMO-SDMA Toward 6G Wireless

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China Communications 2024年第1期21卷 69-87页

作者： Chaowu wu Yue Xiao shu Fang Gang wu National Key Laboratory of Wireless Communications University of Electronic Science and Technology of ChinaChengdu 611731China

In this paper,we present a novel and robust nonlinear precoding(NLP)design and detection structure specifically tailored for multiple-input multipleoutput space division multiple access(MIMO-SDMA)systems toward 6G *** approach aims to effectively mitigate the impact of imperfect channel estimation by leveraging the channel fluctuation mean square error(MSE)for reconstructing a highly accurate precoding matrix at the ***,we introduce a simplified receiver structure that eliminates the need for equalization,resulting in reduced interference and notable enhancements in overall system *** conduct both computer simulations and experimental tests to validate the efficacy of our proposed *** results reveals that the proposed NLP scheme offers significant performance improvements,making it particularly well-suited for the forthcoming 6G wireless.

关键词： MIMO-SDMA nonlinear precoding Tomlinson-Harashima precoding(THP) vector perturbation(VP)

Clinical practice of sepsis-induced immunosuppression:Current immunotherapy and future options

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Chinese Journal of Traumatology 2024年第2期27卷 63-70页

作者： Fei Pei Bin Gu shu-min Miao Xiang-Dong Guan Jian-Feng wu Department of Critical Care Medicine The First Affiliated HospitalSun Yat-sen UniversityGuangzhou510080China Guangdong Clinical Research Center for Critical Care Medicine Guangzhou510080China

Sepsis is a potentially fatal condition characterized by the failure of one or more organs due to a disordered host response to *** development of sepsis is closely linked to immune *** a result,immunotherapy has gained traction as a promising approach to sepsis treatment,as it holds the potential to reverse immunosuppression and restore immune balance,thereby improving the prognosis of septic ***,due to the highly heterogeneous nature of sepsis,it is crucial to carefully select the appropriate patient population for *** review summarizes the current and evolved treatments for sepsis-induced immunosuppression to enhance clinicians'understanding and practical application of immunotherapy in the management of sepsis.

关键词： Sepsis Sepsis-induced immunosuppression Immunotherapy Enrichment Classifier

Mechanism Design for Ancillary Service Market Considering Social Welfare and Fairness

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1000-1010页

作者： Zhi wu Yuanxi wu Wei Gu Zheng Xu shu Zheng Jingtao Zhao School of Electrical Engineering Southeast UniversityNanjing 210096China NARI Technology Co. Ltd.Nanjing 211106China IEEE CSEE

Increasing penetration of distributed energy resources in the distribution network(DN)is threatening safe operation of the DN,which necessitates setup of the ancillary service market in the *** the ancillary service market,distribution system operator(DSO)is responsible for safety of the DN by procuring available capacities of *** existing studies,this paper proposes a novel market mechanism composed of two parts:choice rule and payment *** proposed choice rule simultaneously considers social welfare and fairness,encouraging risk-averse aggregators to participate in the ancillary service *** is then formulated as a linear programming problem,and a distributed solution using the multi-cut Benders decomposition is ***,successful implementation of the choice rule depends on each aggregator’s truthful adoption of private ***,a payment rule is also designed,which is proved to possess two properties:incentive compatibility and individual *** results demonstrate effectiveness of the proposed choice rule on improving fairness and verify properties of the payment rule.

关键词： Aggregator ancillary service market distributed mechanism fairness mechanism design

A_(2)B_(7)-type La-Mg-Ni alloys prepared by Mg thermal diffusion for improved hydrogen storage performance

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Rare Metals 2024年第7期43卷 3260-3272页

作者： Yong-Xi Zhang Guan-Jiu wu Jing Gu Hong-Xing Kang Yuan Li Di Zhou Wen-Feng Wang Lu Zhang shu-min Han Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China Department of Chemistry and Biochemistry San Diego State UniversitySan DiegoCA92182-1030USA State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China

A novel approach based on thermal diffusion was used to achieve controllable Mg content in A_(2)B_(7)-type La-Mg-Ni-based *** formation mechanism of the A_(2)B_(7)-type phase as a result of the thermal diffusion process and the effect of Mg content on hydrogen storage performance were investigated.X-ray diffraction(XRD)patterns and Rietveld refinement results showed that increased Mg transformed the LaNi_(5)phase in the La_(0.74)Sm_(0.03)Y_(0.23)Ni_(4.32)Al_(0.04)precursor alloy into a superlattice *** electron microscopy(SEM)images showed that Mg was evenly distributed in the alloy *** in the superlattice significantly inhibited the phase decomposition of the superlattice structure during the hydrogen absorption/desorption *** A_(2)B_(7)-type La_(0.57)Sm_(0.02)Y_(0.18)Mg_(0.23)Ni_(3.38)Al_(0.03)alloy composed of Gd_(2)Co_(7)and Ce_(2)Ni_(7)phases was successfully *** pressure-composition isotherm profiles showed that the alloy had a hydrogen storage capacity as high as 1.73 wt%,with good cycling *** 50 cycles of hydrogen absorption/desorption,the alloy retained a hydrogen storage capacity of 1.45 wt%,with a capacity retention rate of up to 84.28%.The Mg thermal diffusion process thus provides a new approach for the controlled preparation of La-Mg-Ni-based alloys.

关键词： La-Mg-Ni-based hydrogen storage alloy A_(2)B_(7)-type superlattice alloy Mg thermal diffusion process Phase transformation Hydrogen storage property

Arbuscular mycorrhizal fungi and endophytic fungi differentially modulate polyamines or proline of peach in response to soil flooding

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Pedosphere 2024年第2期34卷 460-472页

作者： Shengmin LIANG Yingning ZOU Bo shu Qiangsheng wu ministry of Education Engineering Research Center of Ecology and Agricultural Use of WetlandHubei Key Laboratory of Waterlogging Disaster and Agricultural Use of WetlandCollege of Horticulture and GardeningYangtze UniversityJingzhou 434025China

Symbiotic fungi are involved in plant flooding tolerance,while the underlying mechanism is not yet *** polyamines(PAs)and proline are also associated with stress tolerance,it is hypothesized that the enhancement of stress resistance by symbiotic fungi is associated with changes in PAs and/or *** aim of this study was to analyze the effect of inoculation with Funneliformis mosseae and Serendipita indica on plant growth,PAs,and proline and the metabolisms in peach(Prunus persica)under ***-week flooding did not affect root colonization frequence of ***,while it promoted root colonization frequence of *** flooding,plants inoculated with *** and *** maintained relatively higher growth rates than uninoculated *** mosseae promoted root ornithine(Orn)contentration and arginine(Arg)and Orn decarboxylase activities under flooding,which promoted putrescine(Put),cadaverine(Cad),and spermidine(Spd)***,*** decreased contentrations of Arg,Orn,and agmatine and Arg decarboxylase activities,thus decreasing PA contentrations under *** were negatively correlated with the expression of PA uptake transporter genes,PpPUT1 and PpPUT2,in *** transporter genes of ***(FmTPO)and ***(SiTPO)were regulated by flooding,of which FmTPO1 was positively correlated with Put,Cad,and Spd,along with positive correlations of Spd with SiTPO1,SiTPO2,and *** flooding,*** decreased proline concentration,while *** increased proline concentration and correlated with expression of a△^(1)-pyrroline-5-carboxylate synthetase gene,*** was thus concluded that *** modulated polyamine accumulation,while *** induced proline accumulation to tolerate flooding.

关键词： △^(1)-pyrroline-5-carboxylate synthetase flooding tolerance Funneliformis mosseae ornithine aminotransferase root colonization Serendipita indica spermidine transporter