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基于社会互动视角的全渠道餐饮企业最优产能决策研究

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系统管理学报 2024年第3期33卷 618-633页

作者：詹文韬姜明辉李城璋哈尔滨工业大学经济与管理学院哈尔滨150001 深圳担保集团有限公司广东深圳518057

全渠道餐饮是指既拥有线上销售、配送渠道又拥有传统线下餐饮服务渠道的企业。企业在生产运营中往往需要保持供给与需求之间的平衡以获得最大利润。其中,餐饮供给与接单、生产、配送环节的产能紧密相关,而来自顾客的餐饮需求则通常受到... 详细信息

全渠道餐饮是指既拥有线上销售、配送渠道又拥有传统线下餐饮服务渠道的企业。企业在生产运营中往往需要保持供给与需求之间的平衡以获得最大利润。其中,餐饮供给与接单、生产、配送环节的产能紧密相关,而来自顾客的餐饮需求则通常受到社会互动效应的影响。通过构建数理决策模型来分析社会互动效应影响下全渠道餐饮企业的最优决策方案,研究表明,社会互动效应能够增加顾客需求并刺激各环节的产能增长,进而有效提升利润。除此之外,餐饮企业的全渠道运营模式相比单渠道运营模式,更高的需求增长以及生产规模效应均能够有效提高利润,并且随着社会互动效应的加强,利润增长更显著。通过对餐饮企业在不同运营模式下的最优产能决策研究,为餐饮企业在数字经济下的高质量运营模式提供决策参考。

关键词：餐饮企业全渠道社会互动产能决策

Multiscale engineering of molecular electrocatalysts for the rapid hydrogen evolution reaction

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Nano Research 2024年第7期17卷 6026-6031页

作者： Huan Li zhan Jiang Yubo Yuan Yirong Tang Jie Zao wentao zhang Peiyi Han Xun zhang Bulin Chen Yongye Liang Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China South China Institute of Environmental Sciences Guangzhou 510655China

Molecular electrocatalysts have demonstrated potential for the hydrogen evolution reaction(HER)due to their well-defined structures and high intrinsic *** rapid production of hydrogen requires molecular electrocatalysts to operate at high current densities,which still presents a *** this work,we demonstrate that molecularly dispersed electrocatalysts of cobalt phthalocyanine anchored on carbon nanotubes(CoPc MDEs)are superior candidates due to the efficient charge transport between the substrate and the active *** intrinsic activity can be enhanced by introducing functional groups on *** facilitate mass transport,di(ethylene glycol)substituted CoPc molecules are further anchored on a threedimensional self-supported electrode(CoPc-DEG MDE@CC),enabling continuous operation for 25 h at−1000 mA/cm^(2)in 1.0 M *** study demonstrates the potential of molecular electrocatalysts for HER and emphasizes the importance of adjusting intrinsic activity,and charge and mass transport capacity for practical molecular electrocatalysts.

关键词： hydrogen evolution reaction cobalt phthalocyanine intrinsic activity mass transport

Sobolev-type Fractional Stochastic Differential Equations Driven by Fractional Brownian Motion with Non-Lipschitz Coefficients

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Journal of Partial Differential Equations 2019年第2期32卷 144-155页

作者： zhan wentao LI Zhi School of Information and Mathematics Yangtze UniversityJingzhou 434023China.

In this paper,we are concerned with the existence and uniqueness of mild solution for a class of nonlinear fractional Sobolev-type stochastic differential equations driven by fractional Brownian motion with Hurst parameter HG(l/2,l)in Hilbert *** obtain the required result by using semigroup theory,stochastic analysis principle,fractional calculus and Picard iteration techniques with some non-Lipschitz conditions.

关键词： Fractional Sobolev-type stochastic differential equations fractional Brownian motion mild solution

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油藏数值模拟连接元计算方法

中国科学：技术科学 2022年第12期52卷 1869-1886页

作者：赵辉刘伟饶翔湛文涛李阳长江大学石油工程学院武汉430100 中国石油化工股份有限公司北京100728

当前基于精细网格的油藏数值模拟存在收敛性差、拟合困难等问题,实际应用中网格粗化后常导致流动结构破坏,预测精度大幅降低.本文提出了一种区别于传统网格体系的油藏数值模拟新方法,从流动的角度将油藏计算域离散为一系列连接单元,利... 详细信息

当前基于精细网格的油藏数值模拟存在收敛性差、拟合困难等问题,实际应用中网格粗化后常导致流动结构破坏,预测精度大幅降低.本文提出了一种区别于传统网格体系的油藏数值模拟新方法,从流动的角度将油藏计算域离散为一系列连接单元,利用节点物性、影响域和移动最小二乘算法等估计压力拉普拉斯算子,给出了反映连接单元渗流能力(连接传导率)和物质基础(连接体积)的属性参数计算方法.以连接单元为对象,通过节点压力方程求解获取单元内的流动通量,沿着连接单元进行饱和度方程的半解析追踪计算产出动态,并引入路径追踪算法定量表征源汇项节点间的流动关系和连通性,最终形成了一套基于连接单元体系的油藏数值模拟方法——简称连接元法(connection element method,CEM).实际应用表明,CEM方法能够实现油藏生产动态的快速拟合预测和注采连通性识别,且概念算例也验证了其在相同节点下相比传统有限差分(体积)法展现出更高的计算精度和计算效率.同时,CEM节点布置较为灵活、并能在较少节点下保证流动路径的完整性来提高预测精度,且支持连接单元上输运方程的并行计算,因此,该方法能够更好地满足实际大规模油藏的快速预测要求,也为具有复杂几何特征的裂缝性及复杂边界等的油藏数值模拟提供了新思路.

关键词：油藏数值模拟连接单元体系连接传导率连接体积路径追踪连接元法

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基于连接元法的多尺度裂缝性油藏数值模拟

力学学报 2023年第7期55卷 1570-1581页

作者：湛文涛赵辉饶翔刘伟徐云峰长江大学石油工程学院武汉430100

针对油藏不同尺度复杂几何特征描述和动态连通性识别等难题,近年来发展了一种基于非欧物理连通网络具有无网格特征的油藏数值模拟连接元方法.文章将连接元法推广到裂缝性油藏,从流体流动的角度,利用连接单元将油藏离散为物理连通网络.... 详细信息

针对油藏不同尺度复杂几何特征描述和动态连通性识别等难题,近年来发展了一种基于非欧物理连通网络具有无网格特征的油藏数值模拟连接元方法.文章将连接元法推广到裂缝性油藏,从流体流动的角度,利用连接单元将油藏离散为物理连通网络.根据节点物性参数、影响域半径和加权最小二乘法给出了压力扩散项的广义差分近似.结合物质守恒方程计算节点控制体积、基质节点间传导率、裂缝节点间传导率以及基质节点与裂缝节点间传导率,从而构建渗流控制方程组的全隐式离散格式,求解压力、饱和度以及含水率等生产动态参数.引入图论深度优先搜索算法,基于每个时间步求解的节点间压力梯度,计算各时间步注入井的劈分系数,定量表征井节点间的流动关系和连通性.算例验证表明,相较基于网格体系的传统方法,该方法能够自由灵活地刻画包括裂缝复杂分布、不规则油藏边界在内的复杂油藏几何,在粗化模型情况下能够保留更丰富的流动拓扑结构,实现计算精度和计算效率的更优平衡,能更好满足实际大规模裂缝性油藏的生产动态模拟预测需求,同时为具有多尺度几何特征的裂缝性油藏及复杂边界油藏的数值模拟提供了新思路.

关键词：裂缝性油藏连接元法油藏数值模拟路径追踪物理连通网络

Gelfand-Kirillov Dimension and Reducibility of Scalar Generalized Verma Modules for Classical Lie Algebras

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Acta Mathematica Sinica,English Series 2024年第3期40卷 658-706页

作者： zhan Qiang BAI Jing JIANG School of Mathematical Sciences Soochow UniversitySuzhou 215006P.R.China E-mail:zqbai@*** jjsd6514@***

Let g be a classical complex simple Lie algebra and q be a parabolic *** M be a generalized Verma module induced from a one dimensional representation of *** M is called a scalar generalized Verma *** this paper,we will determine the reducibility of scalar generalized Verma modules associated to maximal parabolic subalgebras by computing explicitly the Gelfand-Kirillov dimension of the corresponding highest weight modules.

关键词： Generalized Verma module Gelfand-Kirillov dimension Young tableau

Breakthrough in Li-mediated continuous electrosynthesis of ammonia

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Science China Chemistry 2024年第10期67卷 3191-3192页

作者： Fei zhan Chang Yu State Key Laboratory of Chemical Resource Engineering College of Chemical EngineeringBeijing University of Chemical Technology State Key Laboratory of Fine Chemicals Liaoning Key Lab for Energy Materials and Chemical EngineeringSchool of Chemical EngineeringDalian University of Technology

Ammonia（NH3） ranks among the manufactured chemicals,with an annual production surpassing 182 million tons [1],which is an indispensable raw material for fertilizer industry and has been recognized as a promising car...

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Mega-Constellations Based TT&C Resource Sharing: Keep Reliable Aeronautical Communication in an Emergency

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China Communications 2024年第2期21卷 1-16页

作者： Haoran Xie Yafeng zhan Jianhua Lu Department of Electronic Engineering Tsinghua UniversityBeijing 100084China Beijing National Research Center for Information Science and Technology Tsinghua UniversityBeijing 100084China

With the development of the transportation industry, the effective guidance of aircraft in an emergency to prevent catastrophic accidents remains one of the top safety concerns. Undoubtedly, operational status data of the aircraft play an important role in the judgment and command of the Operational Control Center(OCC). However, how to transmit various operational status data from abnormal aircraft back to the OCC in an emergency is still an open problem. In this paper, we propose a novel Telemetry, Tracking,and Command(TT&C) architecture named Collaborative TT&C(CoTT&C) based on mega-constellation to solve such a problem. CoTT&C allows each satellite to help the abnormal aircraft by sharing TT&C resources when needed, realizing real-time and reliable aeronautical communication in an emergency. Specifically, we design a dynamic resource sharing mechanism for CoTT&C and model the mechanism as a single-leader-multi-follower Stackelberg game. Further, we give an unique Nash Equilibrium(NE) of the game as a closed form. Simulation results demonstrate that the proposed resource sharing mechanism is effective, incentive compatible, fair, and reciprocal. We hope that our findings can shed some light for future research on aeronautical communications in an emergency.

关键词： aeronautical emergency communication mega-constellation networked TT&C resource allocation stackelberg game

Cloud-Edge Collaborative Federated GAN Based Data Processing for IoT-Empowered Multi-Flow Integrated Energy Aggregation Dispatch

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Computers, Materials & Continua 2024年第7期80卷 973-994页

作者： zhan Shi Electric Power Dispatching Control Center Guangdong Power Grid Co.Ltd.Guangzhou510030China

The convergence of Internet of Things(IoT),5G,and cloud collaboration offers tailored solutions to the rigorous demands of multi-flow integrated energy aggregation dispatch data *** generative adversarial networks(GANs)are instrumental in resource scheduling,their application in this domain is impeded by challenges such as convergence speed,inferior optimality searching capability,and the inability to learn from failed decision making ***,a cloud-edge collaborative federated GAN-based communication and computing resource scheduling algorithm with long-term constraint violation sensitiveness is proposed to address these *** proposed algorithm facilitates real-time,energy-efficient data processing by optimizing transmission power control,data migration,and computing resource *** employs federated learning for global parameter aggregation to enhance GAN parameter updating and dynamically adjusts GAN learning rates and global aggregation weights based on energy consumption constraint *** results indicate that the proposed algorithm effectively reduces data processing latency,energy consumption,and convergence time.

关键词： IoT federated learning generative adversarial network data processing multi-flowintegration energy aggregation dispatch