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Hausdorff Measure of Space Anisotropic Gaussian Processes with Non-stationary Increments

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Acta Mathematicae Applicatae Sinica 2025年第1期41卷 114-132页

作者： Jun WANG Zhen-long CHEN wei-jie YUAN guang-jun SHEN School of Mathematics and Physics Anhui Polytechnic UniversityWuhu 241000China School of Statistics and Mathematics Zhejiang Gongshang UniversityHangzhou 310018China Department of Mathematics Anhui Normal UniversityWuhu 241000China

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 *** certain conditions,then almost surely c_(1)≤ϕ-m(X([0,1]))≤c_(2),where ϕ denotes the exact Hausdorff measure associated with function ϕ(s)=s1/α_(k)+Σ_(i=1)k(1-αi/αk)log log 1/s for some 1≤k≤d,(α_(1),…,α_(d))∈(0,1]^(d).We also obtain the exact Hausdorff measure of the graph of X on[0,1].

关键词： Hausdorff measure self-similar Gaussian processes non-stationary increment Lamperti theorem

Effect of rolling schedules on ridging resistance of ultra-thin ferritic stainless steel foil

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Journal of Iron and Steel Research International 2025年第1期32卷 198-214页

作者： Jing-wei Zhao Qing-zhong Xie Li-nan Ma Cun-long Zhou Zheng-yi Jiang Xi Liao Xiao-guang Ma College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan030024ShanxiChina Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment Ministry of EducationTaiyuan030024ShanxiChina National Key Laboratory of Metal Forming Technology and Heavy Equipment Ministry of Science and TechnologyTaiyuan030024ShanxiChina School of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuan 030024ShanxiChina School of Mechanical MaterialsBiomedical and Mechatronic EngineeringUniversity of WollongongWollongongNSW2522Australia Shanxi Taigang Stainless Steel Precision Strip Co. Ltd.Taiyuan 030006ShanxiChina

The effect of rolling schedules on the ridging resistance of ultra-thin ferritic stainless steel(FSS)430 foil was evaluated by studying the microstructure and *** results show that specimens processed with three-pass cold rolling under the reductions of 40%,40%and 31%,respectively,exhibit improved ridging resistance owing to the microstructural refinement and the texture structure optimization.A nearly 40%reduction of ridging height can be achieved using the proposed rolling schedule compared to the other two rolling *** addition,the effect of annealing temperature after cold rolling on the ridging resistance of FSS 430 foil is also found to be crucial,and an optimal annealing temperature of 900℃ is obtained for FSS 430 foil with high ridging ***,the improvement in the ridging resistance of FSS 430 foil can be attributed to the reduction in the fraction of{001}and{114}components by optimization of the rolling and annealing processes.

关键词： Ferritic stainless steel foil Ridging Cold rolling Annealing Microstructure Texture

Privacy Distributed Constrained Optimization Over Time-Varying Unbalanced Networks and Its Application in Federated Learning

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IEEE/CAA Journal of Automatica Sinica 2025年第2期12卷 335-346页

作者： Mengli wei Wenwu Yu Duxin Chen Mingyu Kang guang Cheng the School of Cyber Science and Engineering Southeast University IEEE the School of Mathematics Frontiers Science Center for Mobile Information Communication and Security Southeast University the Purple Mountain Laboratories the School of Mathematics Southeast University

This paper investigates a class of constrained distributed zeroth-order optimization(ZOO) problems over timevarying unbalanced graphs while ensuring privacy preservation among individual agents. Not taking into account recent progress and addressing these concerns separately, there remains a lack of solutions offering theoretical guarantees for both privacy protection and constrained ZOO over time-varying unbalanced *** hereby propose a novel algorithm, termed the differential privacy(DP) distributed push-sum based zeroth-order constrained optimization algorithm(DP-ZOCOA). Operating over time-varying unbalanced graphs, DP-ZOCOA obviates the need for supplemental suboptimization problem computations, thereby reducing overhead in comparison to distributed primary-dual methods. DP-ZOCOA is specifically tailored to tackle constrained ZOO problems over time-varying unbalanced graphs,offering a guarantee of convergence to the optimal solution while robustly preserving privacy. Moreover, we provide rigorous proofs of convergence and privacy for DP-ZOCOA, underscoring its efficacy in attaining optimal convergence without constraints. To enhance its applicability, we incorporate DP-ZOCOA into the federated learning framework and formulate a decentralized zeroth-order constrained federated learning algorithm(ZOCOA-FL) to address challenges stemming from the timevarying imbalance of communication topology. Finally, the performance and effectiveness of the proposed algorithms are thoroughly evaluated through simulations on distributed least squares(DLS) and decentralized federated learning(DFL) tasks.

关键词： Constrained distributed optimization decentralized federated learning (DFL) differential privacy (DP) time-varying unbalanced graphs zeroth-order gradient

中国式行政集权的企业减排效应——基于撤县设区改革的微观分析视角

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中国环境科学 2023年第7期43卷 3796-3807页

作者：刘军罗陕缘韦光龙北京大学城市与环境学院北京100871 中国人民大学经济学院北京100872 中国人民大学农业与农村发展学院北京100872

基于1998~2013年中国1014家工业企业的平衡面板数据,来识别市县间集权式改革的环境管辖权上移对企业排放行为的影响路径,对于解决分权体制下属地化管理模式造成的环境污染负外部性问题具有重要现实意义.实证结果表明:撤县设区改革会增... 详细信息

基于1998~2013年中国1014家工业企业的平衡面板数据,来识别市县间集权式改革的环境管辖权上移对企业排放行为的影响路径,对于解决分权体制下属地化管理模式造成的环境污染负外部性问题具有重要现实意义.实证结果表明:撤县设区改革会增大企业COD去除量和减小SO_(2)排放量,说明了该改革起到了对企业排放行为的约束作用.机制研究发现:撤县设区改革通过提高企业全要素生产率或者减少企业产量两条路径来达到减排效果.异质性分析表明,撤县设区改革的企业减排效应在非国有企业、小型企业、南方地区以及中西部地区更为明显.结论通过了区县数据替换、删除特殊样本以及使用县与市中心距离的工具变量识别等一系列稳健性检验.由此,应该设置合理的奖惩措施,保证地方政府科学落实改革方案,并对北方地区进行市场化改革,创造良好的营商环境,同时关注小型企业的市场需求,进行有效的资金人才扶持.

关键词：撤县设区改革企业排放行为全要素生产率企业产量

肝硬化患者血浆降钙素基因相关肽和内皮素水平的观察

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临床荟萃 2005年第4期20卷 200-201页

作者：韦光龙李龙江苏大学附属医院核医学科江苏镇江212001

降钙素基因相关肽(caleitonin gene related peptide，CGRP)，内皮素(endothelin，ET)是体内重要的血管活性物质。它们广泛分布于中枢、周围神经系统和心血管系统及某些器官组织，对血循环起着重要的作用。CGRP是体内最强的舒血管生物... 详细信息

降钙素基因相关肽(caleitonin gene related peptide，CGRP)，内皮素(endothelin，ET)是体内重要的血管活性物质。它们广泛分布于中枢、周围神经系统和心血管系统及某些器官组织，对血循环起着重要的作用。CGRP是体内最强的舒血管生物活性肽，参与各种生理功能的调节，能预防缺血-再灌注造成的肝脏损伤，减轻肝脏脂质过氧化反应。ET是一种强力血管收缩肽，可使门静脉收缩，加重门静脉的高压，它对CGRP相互呈拮抗作用关系。

关键词： CGRP 血浆降钙素基因相关肽肝硬化患者内皮素水平体内门静脉 ET 周围神经系统生理功能生物活性肽

Nonlinear waves for a variable-coefficient modified Kadomtsev-Petviashvili system in plasma physics and electrodynamics

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Communications in Theoretical Physics 2025年第1期77卷 23-34页

作者： guang-Mei wei Yu-Xin Song Tian-Chi Xing Shu Miao School of Mathematical Sciences Beihang University100191 BeijingChina

In this paper,a variable-coefficient modified Kadomtsev-Petviashvili(vcm KP)system is investigated by modeling the propagation of electromagnetic waves in an isotropic charge-free infinite ferromagnetic thin film and nonlinear waves in plasma physics and ***éanalysis is given out,and an auto-B?cklund transformation is constructed via the truncated Painlevé*** on the auto-B?cklund transformation,analytic solutions are given,including the solitonic,periodic and rational *** the Lie symmetry approach,infinitesimal generators and symmetry groups are *** the Lagrangian,the vcm KP equation is shown to be nonlinearly ***,conservation laws for the vcm KP equation are derived by means of a general conservation ***,the physical characteristics of the influences of the coefficient parameters on the solutions are discussed *** solutions have comprehensive implications for the propagation of solitary waves in nonuniform backgrounds.

关键词： modified Kadomtsev-Petviashvili equation Lie symmetry optimal system nonlinear self-adjointness conservation law symbolic computation

Limitations and enhancement opportunities for variceal rebleeding prediction model in patients with cirrhosis

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World Journal of Gastroenterology 2025年第8期31卷 161-163页

作者： guang-Bin Chen Fei Wu Rong-Mei Tang long-Jiang Chen Department of Hepatobiliary Surgery The Second People's Hospital of WuhuWuhu Hospital Affiliated to East China Normal UniversityWuhu 241000Anhui ProvinceChina Graduate School Wannan Medical CollegeWuhu 241000Anhui ProvinceChina Department of Anesthesiology Fudan University Shanghai Cancer Center Xiamen HospitalXiamen 361000Fujian ProvinceChina Department of Hepatobiliary Surgery Affiliated Yijishan Hospital of Wannan Medical CollegeWuhu 241000Anhui ProvinceChina

A multicenter study recently published introduced a novel prognostic model for predicting esophagogastric variceal rebleeding after endoscopic treatment in patients with *** model incorporated six readily available clinical variables—albumin level,aspartate aminotransferase level,white blood cell count,ascites,portal vein thrombosis,and bleeding signs—and demonstrated promising predictive ***,limitations,including the retrospective design and exclusion of patients with hepatocellular carcinoma,may affect the generaliz-ability of the ***,further improvement is needed in the model’s discrimination between intermediate-and high-risk groups in ***-tive validation and inclusion of additional variables are recommended to enhan-ce predictive accuracy across diverse clinical scenarios.

关键词： Prognostic model Liver cirrhosis Variceal rebleeding Risk stratification Endoscopic treatment Portal hypertension Clinical prediction

Polymer-based smart fibers and textiles for wearable electronics

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Science China(Technological Sciences) 2025年第1期68卷 81-116页

作者： Sanming HU Li WANG Zaixian YUAN Kun CHEN wei PENG Hai YIN Zhijun SHI guang YANG School of Biomedical Engineering and Imaging Xianning Medical CollegeHubei University of Science and TechnologyXianning 437100China College of Life Science and Technology Huazhong University of Science and TechnologyWuhan 430074China Wuhan Branch of the National Science Library Chinese Academy of SciencesWuhan 430071China

Smart fibers and textiles have attracted considerable interest for application in wearable devices because of their advantages of being human-friendly,lightweight,flexible,and *** addition,they are considered to have potential applications in health monitoring,energy management,and human-machine interaction *** and polymer fibers,with excellent mechanical strength,wrinkle resistance,and heat resistance,are widely used to fabricate smart fibers and ***,a comprehensive overview of polymer-based fibers and textiles is ***,we review the design principles of various polymer-based smart textiles,including textile-based sensors,energy capture and storage textiles,and computation and display ***,materials used for preparing polymer-based smart fibers,such as metals,carbon-based materials,and natural and synthetic polymers,particularly conductive polymers,are *** addition,this review summarizes key technologies used for preparing smart fibers and the conventional structures of smart ***,the applications of smart textiles in personal health monitoring,thermal management,energy capture and storage,and computation and displays are ***,the current challenges,limitations,and future trends of smart fibers and textiles are discussed.

关键词： polymers smart fibers smart textiles wearable electronics health management

Correlation between grain size,mechanical properties and deformed microstructure of Fe-20Mn-6Al-0.6C-0.15Si low-density steel

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Journal of Iron and Steel Research International 2025年第1期32卷 282-292页

作者： Qi Zhang guang-hui Chen Zheng-liang Xue Zheng-kun Chen guang Xu State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081HubeiChina Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan430081HubeiChina Red Eagle Novel Refractory Materials Research Institute Zhejiang Red Eagle Group Co.Ltd.Huzhou313000ZhejiangChina

The effects of austenite grain size on the deformed microstructure and mechanical properties of an Fe-20Mn-6Al-0.6C-0.15Si(wt.%)low-density steel were *** microstructure of the experimental steel after solution treatment was single austenitic *** austenite grain size increased with solution temperature and time.A model was established to show the relationship between temperature,time and austenite grain size for the experimental *** addition,as the solution temperature increased,the strength decreased,while the elongation first increased and then *** decrease in elongation after solution treatment at 1100℃ for 90 min is contributed to the over-coarse austenite ***,after solution treatment at 900℃ for 90 min,the strength-elongation product reached the highest value of 44.4 GPa%.As the austenite grain size increased,the intensity of//tensile direction fiber *** was accompanied by a decrease in dislocation density,resulting in a lower fraction of low-angle grain boundaries and a lower work hardening ***,the austenite grain size has a critical influence on the mechanical properties of the low-density *** grains lead to a lower yield strength due to the Hall-Petch effect and a lower tensile strength because of lower dislocation strengthening.

关键词： Austenitic low-density steel Solution treatment Grain size Mechanical property Deformed microstructure