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Acta Mathematica Sinica,English Series 2025年

作者： yong Tao liu School of Mathematics and Statistics Ningxia University

Under the assumption of integral m-Bakry-émery Ricci curvature, we give an Escobar-LichnerowiczReilly type eigenvalue estimate for the weighted p-Laplacian on compact smooth metric measure spaces with or without boundaries. This conclusion is a generalization and improvement of Wang-Li’s result in the case of integral Bakry-émery Ricci curvature, and of Seto-Wei’s one to the compact metric measure space setting. Our main tools are the weighted p-Bochner formula and the weighted p-Reilly formula.

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城市居民区回收箱布局和调度双层规划模型及优化算法

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计算机应用研究 2025年第1期42卷 177-184页

作者：郭谦刘勇马良上海理工大学管理学院上海200093

针对城市居民区回收箱布局规划和路径优化问题,首先构建居民区回收箱数量与人口、回收频率、回收阈值的线性函数,并构建双层优化模型,回收总利润最大化作为上层目标,运输成本最小化作为下层目标。其次,为求解具有NP-hard特征的新模型,... 详细信息

针对城市居民区回收箱布局规划和路径优化问题,首先构建居民区回收箱数量与人口、回收频率、回收阈值的线性函数,并构建双层优化模型,回收总利润最大化作为上层目标,运输成本最小化作为下层目标。其次,为求解具有NP-hard特征的新模型,设计加入团体学习算子和自适应选择策略的人类学习优化算法,并与禁忌搜索算法嵌套构建混合人类学习算法(hybrid human learning optimization algorithm,HHLO)。再次,采用不同规模算例,并将新算法与基本人类学习算法、遗传算法、自适应粒子群算法、红嘴蓝鹊算法进行对比分析,验证了模型的可行性和算法的有效性。最后,通过上海杨浦区某实例进行灵敏度分析,探讨回收箱容量、分时定价策略和分区定价策略对回收中心总利润与居民满意度的影响。

关键词：回收箱布局车辆调度混合人类学习优化算法双层规划

多维分析视角下图书馆市民夜校服务改进策略研究——以济南“YEAH归人”泉民夜校为例

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四川图书馆学报 2025年第1期 85-93页

作者：刘勇济南市图书馆济南250117

文章以济南“YEAH归人”泉民夜校为例,采用LDA主题分析模型结合情感分析及Neo4j图数据库知识图谱分析,对社交媒体平台上的读者评论数据进行多维分析,通过文本挖掘识别出六个核心主题:夜校与城市空间融合、多元化课程与创新性、社会参与... 详细信息

文章以济南“YEAH归人”泉民夜校为例,采用LDA主题分析模型结合情感分析及Neo4j图数据库知识图谱分析,对社交媒体平台上的读者评论数据进行多维分析,通过文本挖掘识别出六个核心主题:夜校与城市空间融合、多元化课程与创新性、社会参与度与公众反响、社交与社区互动、个人成长与终身学习、现代教育模式与青年认同。情感分析结果显示,市民对夜校的正面评价普遍较多,也有一定的负面声音和中立态度。通过Neo4j图数据库揭示了课程内容、教师资质和学员反馈之间的复杂关联。基于分析结果提出跨界融合创新夜校服务模式、优化课程设置与师资队伍建设、提升学员线上线下参与度、驱动个人发展与职业成长、加强品牌建设与宣传推广、建立服务评估与反馈机制等图书馆市民夜校服务改进策略。

关键词： LDA模型情感分析知识图谱社交媒体公共图书馆市民夜校

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求解外卖配送问题的深度强化学习算法

计算机应用研究 2025年第1期42卷 205-213页

作者：张旭阳刘勇马良上海理工大学管理学院上海200093

以最小化骑手费用效益比为优化目标,采用最小比率旅行商问题对外卖配送问题进行建模。针对目前算法在求解该问题时计算精度低、算法稳定性差等问题,设计一种基于深度强化学习的DRL-MFA算法。首先,定义外卖配送问题的马尔可夫决策模型来... 详细信息

以最小化骑手费用效益比为优化目标,采用最小比率旅行商问题对外卖配送问题进行建模。针对目前算法在求解该问题时计算精度低、算法稳定性差等问题,设计一种基于深度强化学习的DRL-MFA算法。首先,定义外卖配送问题的马尔可夫决策模型来模拟智能体与环境的交互过程;其次,在编码阶段设计多特征聚合嵌入子层,实现特征间的优势互补并提高模型对非线性问题的建模能力;最后,在解码阶段通过注意力机制和指针网络计算解的概率分布,采用策略梯度算法对网络模型进行训练。通过经典算例和长春市仿真案例的相关实验分析,结果表明该算法能够有效地求解外卖配送问题,且与其他启发式算法相比,具有更高的稳定性和求解精度。此外,进行参数灵敏度实验,考虑不同定价策略对外卖配送的影响,使研究结果更具现实意义。

关键词：外卖配送问题最小比率旅行商问题深度强化学习多特征嵌入注意力机制

Two-level consensus modeling with utility and cost constraints

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Journal of Systems Engineering and Electronics 2022年第3期33卷 716-726页

作者： DIAO Weixue liu yong School of Business Jiangnan UniversityWuxi 214122China

There exist many two-level group consensus problems with different psychological behaviors of decision *** deal with these group consensus problems and reach a stable consensus,based on the principles and methods of grey system,utility theory and group consensus,we use grey utility function to describe and reflect decision makers’opinion preferences in different subgroups and different levels,and then we construct a two-level group consensus method with a moderator,and exploit it to solve the negotiation problems of the natural gas subsidy.

关键词： two-level group consensus group negotiation uti-lity function natural gas subsidy

Experimental Study of Irregular Wave Reflection by a Perforated Caisson Breakwater Under Wave Overtopping Conditions

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Journal of Ocean University of China 2022年第4期21卷 926-934页

作者： liu Xiao liu yong Shandong Provincial Key Laboratory of Ocean Engineering Ocean University of ChinaQingdao 266100China

The characteristics of irregular wave reflection by a perforated caisson breakwater under wave overtopping conditions were investigated using physical model *** effects of various parameters,especially the mean overtopping discharge that was mainly determined by the relative crest freeboard,on the reflection coefficient of perforated caisson breakwater were analyzed using experimental *** results showed that the wave overtopping occurrence had no appreciable effect on the reflection coefficient when the mean overtopping discharge was less than 0.2 m^(3)(m s)^(−1).Under the wave overtopping condition,the reflection coefficient of the perforated caisson breakwater in this study was reduced by 20%-50% compared with that of the non-perforated caisson breakwater.A predictive formula of the reflection coefficient for perforated caisson breakwaters in terms of relative water depth,relative chamber width,and porosity of the caisson front wall,was developed for practical engineering design.

关键词： perforated caisson model test reflection coefficient wave overtopping predictive formula

高浓度有机废水“零排放”发展现状及趋势的文献计量学分析

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水处理技术 2025年第1期51卷 1-5,12页

作者：丁士元刘一明刘勇刘军侯立安天津大学地球系统科学学院天津300072 南京万德斯环保科技股份有限公司江苏南京211100 北京师范大学环境学院北京100875

近年来随着经济快速发展,化工行业产生大量高浓度有机废水,此类废水中有机污染物浓度高、污染物种类多、性质差异大、毒性大,存在巨大的环境风险。本文对Web of Science(WOS)核心合集数据库和中国知网(CNKI)核心论文数据库中的相关文献... 详细信息

近年来随着经济快速发展,化工行业产生大量高浓度有机废水,此类废水中有机污染物浓度高、污染物种类多、性质差异大、毒性大,存在巨大的环境风险。本文对Web of Science(WOS)核心合集数据库和中国知网(CNKI)核心论文数据库中的相关文献进行可视化处理,综述了国内外高浓度有机废水研究现状。该领域近十年来我国研究热点集中于高浓度有机废水的“零排放”、资源化利用、膜处理、生化-物化技术方面的研究。并结合现有问题从组合工艺高效处理废水与低成本资源化方向提出可行性建议,包括:1)针对性组合工艺发展,因地制宜实现高浓度有机废水高效、绿色、低价处理;2)开发新型水处理技术,实现低成本、低碳化、高效率工艺升级;3)提升资源化效率,实现水、盐、贵金属和高值有机物甚至是过程中产生热能的回收利用,提升低值废盐等的高值利用;4)模块化和智能化,结合人工智能等实现处理单元模块化、智能化等,升级环保产业新质生产力。

关键词：高浓度有机废水零排放膜处理法资源化

Improved gravitational search algorithm based on free search differential evolution

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Journal of Systems Engineering and Electronics 2013年第4期24卷 690-698页

作者： yong liu Liang Ma School of Management University of Shanghai of Science and Technology Department of Foundation Courses Teaching Yancheng Institute of Technology

This paper presents an improved gravitational search algorithm （IGSA） as a hybridization of a relatively recent evolutionary algorithm called gravitational search algorithm （GSA）, with the free search differential evolution （FSDE）. This combination incorporates FSDE into the optimization process of GSA with an attempt to avoid the premature convergence in GSA. This strategy makes full use of the exploration ability of GSA and the exploitation ability of FSDE. IGSA is tested on a suite of benchmark functions. The experimental results demonstrate the good performance of IGSA.

关键词： gravitational search algorithm (GSA) free search differential evolution (FSDE) global optimization.

DOA estimation for mixed signals with gain-phase error array

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Journal of Systems Engineering and Electronics 2017年第6期28卷 1046-1056页

作者： Jiaqi Zhen yong liu College of Electronic Engineering Heilongjiang University Harbin 150080 China

Most of the direction of arrival(DOA) estimation methods often need the exact array manifold, but in actual applications,the gain and phase of the channels are usually inconsistent, which will cause the estimation invalid. A novel direction finding approach for mixed far-field and near-field signals with gain-phase error array is provided. Based on simplifying the space spectrum function by matrix transformation, DOA of far-field signals is obtained. Consequently, errors of the array are acquired according to the orthogonality of far-field signal subspace and noise ***, DOA of near-field signals can be estimated. The method merely needs one-dimensional spectrum searching, so as to improve the computational efficiency on the premise of ensuring a certain accuracy, simulation results manifest the effectiveness of the method.

关键词： direction of arrival(DOA) gain-phase errors far-field signals near-field signals

Design and implementation of Chinese libration point missions

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Science China(Information Sciences) 2023年第9期66卷 100-114页

作者： Lei liu Weiren WU yong liu Beijing Aerospace Control Center Lunar Exploration and Space Program Center

Libration points are vital for lunar and deep space explorations because of their unique positions and dynamics. This paper first traces the development of relevant missions since ISEE-3 and then presents the details of the trajectory design and implementation of four Chinese libration point missions in the lunar exploration project: the two Sun-Earth libration point missions by CHANG’E-2 and CHANG’E-5 and the two lunar libration point missions accomplished by CHANG’E-5T1 and Queqiao. The orbit technologies for these libration point missions are also elaborated on regarding trajectory design, maneuvering, and tracking,as well as orbit determination. This paper is expected to provide a reference for future cislunar and deep space exploration.

关键词： libration point three-body problem lunar exploration cislunar space flight scheme