Research on the Control Strategy of Micro Wind-Hydrogen Coupled System Based on Wind Power Prediction and Hydrogen Storage System Charging/Discharging Regulation

This paper addresses the micro wind-hydrogen coupled system,aiming to improve the power tracking capability of micro wind farms,the regulation capability of hydrogen storage systems,and to mitigate the volatility of wind power generation.A predictive control strategy for the micro wind-hydrogen coupled system is proposed based on the ultra-short-term wind power prediction,the hydrogen storage state division interval,and the daily scheduled output of wind power generation.The control strategy maximizes the power tracking capability,the regulation capability of the hydrogen storage system,and the fluctuation of the joint output of the wind-hydrogen coupled system as the objective functions,and adaptively optimizes the control coefficients of the hydrogen storage interval and the output parameters of the system by the combined sigmoid function and particle swarm algorithm(sigmoid-PSO).Compared with the real-time control strategy,the proposed predictive control strategy can significantly improve the output tracking capability of the wind-hydrogen coupling system,minimize the gap between the actual output and the predicted output,significantly enhance the regulation capability of the hydrogen storage system,and mitigate the power output fluctuation of the wind-hydrogen integrated system,which has a broad practical application prospect.

Mode switching control strategy of dual motors coupled driving on electric vehicles

Based on analyzing the structure and working principle on electric vehicles （EVs） with dual motors coupled by planetarY gears, the control strategy of mode switching was proposed. The power interruption problem on EVs with automatic mechanical transmission （AMT） shifting was resolved. Based on the speed-torque characteristics of the planetary gears and the principle of the auxiliary motor＇ s zero speed braking, control features of mode switching were introduced. The mode shifting between the main motor mode and dual motors coupled driving were studied. Matlab/Simulink was adopted as a platform to develop the simulation model of EVs with dual motors drive system and 3 gears AMT. Simulation results demonstrated that the power interruption of dual motors drive system was solved during mode switching. The power requirements of EVs were satisfied, too.

In Situ Coupling Strategy for Anchoring Monodisperse Co_9S_8 Nanoparticles on S and N Dual?Doped Graphene as a Bifunctional Electrocatalyst for Rechargeable Zn–Air Battery

An in situ coupling strategy to prepare Co_9S_8/S and N dual?doped graphene composite(Co_9S_8/NSG) has been proposed. The key point of this strategy is the function?oriented design of organic compounds. Herein, cobalt porphyrin derivatives with sulfo groups are employed as not only the coupling agents to form and anchor Co_9S_8 on the graphene in situ, but also the heteroatom?doped agent to generate S and N dual?doped graphene. The tight coupling of multiple active sites endows the composite materials with fast electrochemical kinetics and excellent stability for both oxygen reduction reaction(ORR) and oxygen evolution reaction(OER). The obtained electrocatalyst exhibits better activity parameter(ΔE = 0.82 V) and smaller Tafel slope(47.7 mV dec^(-1) for ORR and 69.2 mV dec^(-1) for OER) than commercially available Pt/C and RuO_2. Most importantly, as electrocatalyst for rechargeable Zn–air battery, Co_9S_8/NSG displays low charge–discharge voltage gap and outstanding long?term cycle stability over 138 h compared to Pt/C–RuO_2. To further broaden its application scope, a homemade all?solid?state Zn–air battery is also prepared, which displays good charge–discharge performance and cycle performance. The function?oriented design of N_4?metallomacrocycle derivatives might open new avenues to strategic construction of high?performance and long?life multifunctional electrocatalysts for wider electro?chemical energy applications.

Motivations, Challenges and Coping Strategies for Smoking Cessation: Based on Multi-ethnic Pregnant Couples in Far Western China

The present study aimed to clarify the smoking cessation motivations, challenges and coping strategies among pregnant couples. A qualitative design using a grounded theory approach was applied. Data were collected by individual semi-structured interviews with 39 married individuals(21 non-smoking pregnant women and 18 smoking or ever-smoking men with a pregnant wife) and 3 imams in an ethnically diverse region of far western China. The most common theme for smoking cessation motivation was 'embryo quality'(i.e., a healthier baby), followed by family's health. Most interviewees reported that husband's withdrawal symptoms were the greatest challenge to smoking cessation, followed by the Chinese tobacco culture. Coping strategies given by the pregnant women typically involved combining emotional, behavioral and social interventions. Social interventions showed advantages in helping to quit smoking. Pregnancy appears to be a positive stimulus for pregnant couples' smoking cessation. Our results suggest that pregnancy, a highly important life event, may help to reduce barriers to smoking cessation at the social level(e.g., limiting access to cigarettes, avoiding temptation to smoke), but does little to help with the withdrawal symptoms. Professional guidance for smoking cessation is still necessary.

Compensation/consumption hierarchical control strategy based on wind-solar-hydrogen coupling grid connection

In the process of grid-connected wind and solar power generation,there are problems of high rate of abandoning wind and light and insufficient energy.In order to solve these problems,we construct a grid-connected wind-solar hydrogen storage(alkaline electrolyzer(AE)-hydrogen storage tank-battery-proton exchange membrane fuel cell(PEMFC))coupled system architecture.A grid-connected compensation/consumption hierarchical control strategy based on wind-solar hydrogen coupling is proposed.During the grid-connected process of wind and solar power generation,the upper-level control allocates power reasonably to the hydrogen energy storage system by dispatching the power of wind and solar power generation.At the same time,the control strategy ensures that the pressure of the hydrogen storage tank is within the safety range limit,and the lower control completes the control of the duty cycle of the converter in the system.Due to the randomness of wind and light,the hydrogen energy storage system is divided into three working conditions,namely compensation,balance and consumption,and five working modes.The simulation results show that the hydrogen energy storage system compensates for 40%of the power shortage,and consumes 27.5%of the abandoned wind and solar energy,which improves the utilization rate of clean energy.

Multi-motor Drive System Based on Adjacent Coupling Error Strategy

A new control strategy named adjacent coupling error strategy is proposed to multi-motor drive system. The adjacent coupling error control scheme is developed considering the tracking speed error in one motor and the synchronous error among adjacent motors simultaneously. In the strategy, due to non-linear effects of the two mentioned errors to the motion control of motor i, an adaptive fuzzy logic controller is designed to decide the control variable of the motor drive system. The multi-motor drive system is modeled and simulated by SIMULINK. The simulated researches show that the proposed strategy improves the synchronization, stabilization, and convergence of the multi-motor system.

基于漏斗函数双电机伺服系统跟踪与同步控制

针对双电机驱动伺服系统具有未知非线性的问题,提出一种基于漏斗函数的跟踪与同步控制方案。首先,利用神经网络逼近和补偿复杂的非线性,在此基础上,引入滤波技术解决传统反步控制的“计算爆炸”问题,同时引入非光滑漏斗误差面确保系统的状态量被约束在预定义的漏斗边界内,结合改进的漏斗函数和反步设计技术设计了一种自适应量化漏斗跟踪控制方案。为了同时保证双电机的同步运行,同步控制器采用了平均偏差耦合策略,实现了双电机伺服系统的跟踪与同步控制。仿真结果表明,该方法可以实现对负载的跟踪以及双电机的同步。

“三创融合”型经管类人才培养与乡村振兴战略的耦合机制研究

党的二十大报告提出全面推进乡村振兴,并将其纳入构建新发展格局的整体框架中,乡村振兴最关键的因素是人才,这对高校创新创业创造人才培养提出了新的要求,也对高校人才培养与乡村振兴战略的耦合发展提出新的挑战。以“三创”教育为导向,从耦合机制构建的角度,就高校“三创融合”型经管类人才和乡村振兴战略的耦合发展进行分析和探讨,实现高校人才培养与乡村振兴战略的深度融合发展。

相依指挥控制网络耦合策略研究

指挥控制网络的层次关联复杂、通信链路交错等特点,使其表现出明显的多网相依特征。针对现有相依边的研究方法难以有效表达网络的耦合关系,通过研究基于节点介数的相依强度、基于桥接系数的链路均衡性指数,提出基于相依强度与链路均衡性的相依指挥控制网络耦合策略,仿真验证表明该策略提高了网络抗级联失效能力。

大型带罩天线阵列的精确高效电磁仿真算法

针对大型带罩天线阵列系统的辐射特性仿真问题,基于等效原理和波导模式匹配法,建立了多层快速多极子算法的波端口模型,实现了对天线激励源和匹配负载的精确电磁建模,同时提出了一种适用于计算金属介质天线模型的多层快速多极子算法并行策略,通过建立多棵八叉树结构降低了计算过程中各进程间的通信量,实现了对大型带罩天线阵列系统的精确、高效一体化仿真计算。通过与高阶矩量法及有限元-边界积分方程法计算得到的天线方向图、S参数进行对比,验证了该方法的精确性及高效性。

新发展格局下体育竞赛表演业产业链韧性提升的耦合逻辑、风险因素与实践方略

依托新发展格局,提升体育竞赛表演业产业链韧性是产业链现代化建设和体育竞赛表演业高质量发展的重要议题。本文运用文献资料法、逻辑分析法,结合产业链韧性的内涵将体育竞赛表演业产业链韧性拆解为补链、疏链和强链能力,具体表现为产业链在面对外部压力或风险时的冲击抵抗能力、恢复重构能力和核心竞争能力,此“三力要素”与构建新发展格局存在高度耦合。在此基础上识别新发展格局下体育竞赛表演业产业链韧性提升的风险因素:断链风险,核心技术自主创新能力不足;堵链风险,竞赛表演市场供求关系失衡;弱链风险,复合型体育人才本土供给不足。据此提出实践方略:补链方面,以完善的数字基础设施构建体育竞赛表演产业生态体系;疏链方面,以供给侧结构性改革调和体育竞赛表演市场供求关系;强链方面,以多元化渠道提升体育竞赛表演业人才要素流通效率。

自旋翼无人机纵向解耦控制技术研究

针对对象自旋翼无人机,提出在干扰下如何实现解耦控制。由于对象无人机空中段飞行过程中对外界干扰十分敏感,很容易在干扰下激发高度和速度间的耦合,现有控制策略优先考虑了速度控制,而牺牲了高度控制性能,所以导致高度控制鲁棒性较差。针对此特性,提出升降速率指令内回路控制结构以增加系统对高度差的反应能力,并且在桨盘控制通道加入高度反馈以弥补油门控制的不足。通过仿真测试改进策略的解耦性能以及鲁棒性,验证了该策略是合理且可行的。

分段式的大功率远程等离子体源系统设计

目前远程等离子体源系统普遍存在输出功率低、系统负载适应范围窄和生成等离子体浓度不稳定等问题,该文基于对TCP型腔体的放电模式和负载特性分析,提出一种分段式的大功率远程等离子体源系统,改进的功率电路提高了电源输出功率,分离的点火回路简化了电路设计并提高自由度,分段的控制策略极大程度的提高了系统负载适应范围,可电离多种气体和更宽范围气体流量。通过实际样机测试,验证了此系统方案设计的可行性,为等离子体电源设计提供了参考价值。

生态耦合下高技术产业集群横向创新链主体合作策略演化

从知识生态耦合视角对集群横向创新链主体合作策略演化展开研究,构建集群横向创新链主体和其邻居合作交互的演化博弈模型,进行系统稳定性分析,并考虑到网络嵌入性,对不同网络规模下的集群横向创新链主体合作策略进行动态演化仿真分析。研究发现,知识互补度能促进集群横向创新链主体间合作策略演化,并且该促进作用存在一个临界值,随着网络规模的增大临界值从0.5上升至0.8,但是网络规模越大网络演化的速度越慢。另外,知识重叠度对集群横向创新链主体间合作策略演化起抑制作用,不过存在一个较低的临界值0.4,当知识重叠度低于临界值时能够促进集群横向创新链主体合作;超过临界值后随知识重叠度的增加,对集群横向创新链主体合作的抑制作用增大,而且知识重叠度产生的作用不受网络规模的影响。

文旅融合与乡村振兴的耦合共生、现实困境及优化策略

文章基于耦合理论和共生理论的双重视角,构建了文旅融合与乡村振兴的耦合共生理论模型,并采用案例分析的方法,剖析了文旅融合与乡村振兴的耦合共生现实情况。结果表明:文旅融合与乡村振兴的耦合共生体现在以目标耦合促价值共创、以场域耦合促设施共建、以功能耦合促风貌共塑三方面;文旅融合与乡村振兴的耦合共生存在着政策方案有待完善、基础设施有待提升、资源开发有待创新的现实困境。建议相关部门从做好顶层设计、加强基础建设、创新开发形式三方面入手,促进文旅融合与乡村振兴耦合共生的未来发展。

乡村振兴战略下体育旅游与民俗体育耦合的意义及策略研究

乡村振兴战略下,乡村走体育旅游发展路线成为乡村脱贫、乡村群众致富的重要手段之一,想要推动乡村体育旅游实现特色化发展、内涵式发展及长远健康发展,有必要促成乡村体育旅游与民俗体育充分耦合,从根本上杜绝乡村体育旅游发展同质化问题的出现,切实让民俗体育文化成为乡村体育旅游发展的软支撑,为我国体育事业良好发展作出一定贡献。该文率先阐述乡村振兴战略下体育旅游与民俗体育耦合的现实意义,而后引申出具体耦合策略,最后补充耦合注意事项,丰富相关理论研究。

基于“人口—产业—治理”匹配度测算的我国城镇化空间优化策略探讨

随着我国城镇化进入中后期,城镇化空间发展要素不匹配、不协调的特征持续凸显。面对由此引发的各类问题,党的十八大以来,我国政府连续出台两轮新型城镇化规划,从系统视角提出了人口、产业、治理等要素协同配合的城镇化空间政策,为破解新时期城镇化面临的矛盾问题指明了方向。为推动城镇化空间政策的有序实施、优化提升城镇化各维度要素的协同发展,利用2020年“七普”全国297个地级及以上城市的统计数据构建指标体系,基于耦合协调度模型,测度城镇化与人口、产业、治理各维度的耦合协调水平,分析城镇化“人口—产业—治理”空间匹配度格局,识别发现我国现有城镇化空间匹配度格局呈现治理匹配度相对偏低、区域协调性有待增强、高匹配度新发展通道逐步形成、中小城市匹配度亟待提高。在此基础上,从坚持政策系统性、巩固完善总体空间布局、保障规模政策高效实施、强化特殊地区的针对性政策供给、建立政策动态调控机制等方面提出优化和推进城镇化空间政策实施的策略建议。

“双碳”战略与新质生产力的耦合机制、要素解构与共生路径

新质生产力本身就是绿色生产力,因此作为加速推进国家能源绿色转型的关键部署,“双碳”战略与新质生产力具有显著的耦合共生关系。新质生产力发展为“双碳”战略进行核心技术绿色创新探寻新空间,“双碳”战略实施为新质生产力系统构建绿色经济政策体系铸就新基底。通过解构共生单元、共生模式、共生界面、共生环境等要素,本文从四个维度提出“双碳”战略与新质生产力的共生路径:聚合共生单元,激发多元主体的深度参与动力;创设共生模式,推动“双碳”战略与新质生产力的互惠共进;强化共生界面,打通绿色低碳发展与新质生产力的传输协同渠道;营造共生环境,构建绿色经济政策体系的制度优势,以此实现稳妥推进碳达峰碳中和、促进生产力系统性跃升的齐路并进。

摄像机视场约束下无人机视觉着舰导引方法

无人机基于计算机视觉技术进行着舰时,既需要关注自身的飞行轨迹是否合理,也需要注意所对应的视觉特征点在图像空间中的运动是否合理,即需要满足机载摄像机视场等约束。此外,由于海洋风浪等扰动作用,很难整定出合适的参数使视觉特征点以期望的轨迹运动,并使得图像误差以期望的动态过程收敛。针对这些问题,设计了一种将基于tau耦合策略的轨迹规划与IBVS相容的视觉导引方法,同时引入PPC理论以直接描述图像误差收敛的动态过程,并赋予参数整定工作明确直观的物理意义,从而降低参数整定的难度。最后仿真验证了所研究成果的可行性和有效性。

基于“虚拟碳储存”的需求侧电-碳耦合交易机制

“双碳”目标指引下,电力系统低碳转型势在必行。结合时变价格信号的低碳需求响应可以引导用户调整用电行为降低碳排放。然而,不同用户灵活性差异较大,仅通过价格信号的变化难以引导低灵活性用户实现碳减排;同时,部分高灵活性用户的调节潜力并未被完全释放。为了通过用户间碳排放责任的交易进一步释放需求侧的碳减排潜力,该文提出需求侧电-碳耦合交易机制,旨在通过碳排放责任的再分配进一步释放高灵活性用户的碳减排潜力。但根据比例共享定理,碳排放责任与用电量成固定比例,限制其在用户间的灵活转移,提出“虚拟碳储存”,使储能中电的碳排放强度成为可控变量,实现碳排放责任在用户间的自由转移。以地区电力系统为研究场景,综合考虑电费成本、碳排放成本以及负荷调节成本,引入近端策略优化算法求解用户的最佳用电策略。仿真结果显示,相比用户仅参与传统电力市场,参与电-碳耦合市场并考虑“虚拟碳储存”,可减少31.9%的碳排放,同时显著降低了用户用电成本。