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Simultaneous improving luminescence intensity and stability of CsPbBr_(3):SCN−@Eu/Zr-Uio-66-NH_(2) with tunable emissions from blue to green and applications in indoor photovoltaics

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Nano Research 2024年第8期17卷 6879-6887页

作者： Minze Li Yao Sun Honglai Lu Peifen Zhu Ruihong wang guofeng wang Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China Department of Electrical Engineering and Computer Science University of MissouriColumbiaMO 65211USA

The construction of stable and efficient materials that emit blue and green light remains a *** the blue light materials reported,metal-organic framework(MOF)materials are rarely reported as blue phosphors due to their weak luminescence *** on the construction of CsPbBr_(3)@MOF(CPB@MOF),an innovative idea was proposed to simultaneously enhance the green luminescence of CPB and the blue luminescence of MOF through the interaction between CPB and MOF for the first *** expected,the blue luminescence from CPB:7%SCN−@0.5%MOF:Eu as well as the green luminescence from 5%CPB:7%SCN−@MOF:Eu was sufficient to construct high-performance light-emitting diode(LED)devices and further excite solar cells to generate stable photoelectric *** white LED(WLED)device with excellent color quality(color rendering index(CRI)=96.2)and correlated color temperature(CCT=9688 K)can be constructed by using the obtained blue-emitting CPB:7%SCN-@0.5%MOF:Eu,green-emitting 5%CPB:7%SCN−@MOF:Eu,and red-emitting PPB:30%Mn^(2+).The density functional theory(DFT)theoretical calculation results indicate that the p orbital of Pb plays the major role in the conduction band,and the p orbital of Br plays the major role in the valance band of CPB and CPB:SCN−.While the p orbital of O plays the major role in both the conduction band and valance band of *** heat capacity of CPB and CPB:SCN−separately reaches the Dulong–Petit limit at 200 and 400 K,indicating that the thermal stability of CsPbBr_(3)increases after SCN−doping.

关键词： CsPbBr_(3):SCN−@Uio-66-NH_(2) composites luminescence stability white light-emitting diodes(WLEDs) indoor photovoltaics density functional theory(DFT)calculation

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Stable multi-electron reaction stimulated by W doping VS_(4)for enhancing magnesium storage performance

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Journal of Energy Chemistry 2024年第2期89卷 89-98,I0004页

作者： Yuxin Tian Jiankang Chen guofeng wang Bing Sun Alan Meng Lei wang Guicun Li Jianfeng Huang Shiqi Ding Zhenjiang Li College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOEShandong Key Laboratory of Biochemical AnalysisCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina School of Material Science and Engineering International S&T Cooperation Foundation of Shaanxi ProvinceXi’an Key Laboratory of Green Manufacture of Ceramic MaterialsShaanxi University of Science and TechnologyXi’an 710021ShaanxiChina

Rechargeable magnesium batteries(RMBs)hold promise for offering higher volumetric energy density and safety features,attracting increasing research interest as the next post lithium-ion *** high performance cathode material by inducing multi-electron reaction process as well as maintaining structural stability is the key to the development and application of ***,multielectron reaction occurred in VS_(4)by simple W doping strategy.W doping induces valence of partial V as V^(2+)and V^(3+)in VS_(4)structure,and then stimulates electrochemical reaction involving multi-electrons in 0.5%*** flower-like microsphere morphology as well as rich S vacancies is also modulated by W doping to neutralize structure change in such multi-electron reaction *** fabricated 0.5%W-V-S delivers higher specific capacity(149.3 m A h g^(-1)at 50 m A g^(-1),which is 1.6 times higher than that of VS_(4)),superior rate capability(76 mA h g^(-1)at 1000 mA g^(-1)),and stable cycling performance(1500cycles with capacity retention ratio of 93.8%).Besides that,pesudocapaticance-like contribution analysis as well as galvanostatic intermittent titration technique(GITT)further confirms the enhanced Mg^(2+)storage kinetics during such multi-electron involved electrochemical reaction *** discovery provides new insights into the designing of multi-electron reaction process in cathode as well as neutralizing structural change during such reaction for realizing superior electrochemical performance in energy storage devices.

关键词： Multi-electron reaction W doping Stable structure Cathode Rechargeable magnesium batteries

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Provoking Buying Behaviors Amid Crises:Unfolding the Underlying Mechanisms of Psychological Impairments

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International Journal of Mental Health Promotion 2024年第4期26卷 279-292页

作者： Muhammad Waleed Ayub Ghouri guofeng wang Muhammad Ali Hussain Zhisheng Li Tachia Chin School of Management Zhejiang University of TechnologyHangzhou310023China School of Management and Economics University of Electronic Science and Technology of ChinaChengdu611731China Business School NingboTech UniversityNingbo315100China

Crises in the past have caused devastating,long-lasting impacts on the global *** after-effects always bring some dynamic and rigorous challenges for businesses and *** challenges have always been a point of discussion for *** recent COVID-19 pandemic emaciated the global economy,leaving everyone mired in uncertainty,fear,and psychological *** of the headwind features utilized by consumers during pandemic was panic buying(PB),which must be explored in various contexts for policymakers and *** address this gap,this study deployed a moderated mediation mechanism,integrating the health belief model(HBM)and competitive arousal theory(CAT)to excavate the notions underlying PB with the intrusion of evolved real-time psychological disorders:intolerance of uncertainty(IU)and cyberchondria(CYC).The study was conducted as a natural experiment in a South Asian developing economy using online *** found that health beliefs—perceived severity(PSV)and perceived susceptibility(PSC)—positively impact perceived arousal(PA),which causes PB,and that PA has a sturdy mediator ***,in the relationship between health beliefs and arousal,the different psychological disorders were found to have significant moderating roles The study findings can help mitigate risk uncertainties and panic situations and thus contribute to consumers’wellbeing.

关键词： Panic buying health belief model mental health competitive arousal theory intolerance of uncertainty cyberchondria

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高含硫气井元素硫溶解度与硫沉积预测模型研究

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成都理工大学学报（自然科学版） 2024年第1期51卷 46-59页

作者：王国锋中国石油青海油田分公司甘肃敦煌736200

为了正确评估高含硫气井的储层硫堵伤害,通过收集整理大量酸性气体硫溶解度实验数据,建立了考虑溶质压力特性的典型高含硫气藏条件下元素硫溶解度预测模型。在此基础上,根据气水渗流理论与硫溶解度随压力变化量函数,推导了元素硫沉积量... 详细信息

为了正确评估高含硫气井的储层硫堵伤害,通过收集整理大量酸性气体硫溶解度实验数据,建立了考虑溶质压力特性的典型高含硫气藏条件下元素硫溶解度预测模型。在此基础上,根据气水渗流理论与硫溶解度随压力变化量函数,推导了元素硫沉积量化表征数学模型;采用四川盆地某高含硫边水气藏与典型硫堵气井的基础静态与动态资料等,定量分析了影响气井硫堵状况的因素与储层硫饱和度的变化规律,探讨了缓解储层硫堵状况的技术思路与对策。研究结果表明:(1)通过验证,证明了本文建立的硫溶解度预测模型具有更好的预测性能,预测结果也更可靠;(2)气井硫堵程度受制于多种因素的综合影响,在相同的生产时间下,较大的气井日产气量、储层(初始)含水饱和度、非达西流常数,较小的储层有效厚度、储层(初始)孔隙度与渗透率、井底流压,能够造成更严重的气井硫沉积堵塞状况;(3)随着气井生产时间的增加,气井硫堵区域逐渐向井筒外围地层扩展。在气藏不同开发阶段,应该采取不同的硫沉积治理思路。开发初期,建议采用“控速为先,治理为辅”的治硫思路;开发中期,采取“控治并重”的思路;开发后期,应以经济效益为先,维持气井带液生产是该阶段的重点工作。

关键词：高含硫气藏含硫气井硫溶解度硫沉积预测模型

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Visual inertial SLAM algorithm based on improved front-end point-line feature processing

Visual inertial SLAM algorithm based on improved front-end p...

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第35届中国过程控制会议

作者： Zehui Wu Yunsheng Fan guofeng wang College of Marine Electrical Engineering Dalian Maritime University

With the goal of addressing the issue of inadequate feature information extraction in indoor weak texture scenes, which can result in low tracking success or low positioning precision, a visual inertial SLAM algorithm built on improved frontend point-line feature processing is suggested. First, to enhance the accuracy of the ensuing pose estimate, the extracted ShiTomasi corner points are optimized by sub-pixel detection in the point feature processing aspect. This yields corner points with a greater position coordinate precision. Second, an improved LSD method is presented to acquire higher quality line features in line feature processing. The algorithm is validated by tests and aims to address issues with line features derived by LSD algorithm. Lastly, a real scene and the EuRoC dataset are used to test the method. The positioning accuracy of the suggested algorithm is 14.99% greater than that of VINS-Mono and 19.76% higher than that of PL-VIO, according to the data. The algorithm in this study has good positioning impact and strong robustness in the weak texture scene, as demonstrated by the real trajectory in the real scene being essentially compatible with the algorithm estimated trajectory.

关键词： Visual inertial SLAM point-line feature sub-pixel corner texture-less scenes

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Dynamic obstacle avoidance for USV based on improved DDPG

Dynamic obstacle avoidance for USV based on improved DDPG

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第35届中国过程控制会议

作者： Haobo Li Yunsheng Fan guofeng wang Zhe Sun College of Marine Electrical Engineering Dalian Maritime University Key Laboratory of Technology and System for Intelligent Ships of Liaoning Province

With the deepening of marine research, the application range of Unmanned Surface Vehicle(USV) is expanding day by day, and the autonomous collision avoidance function of USV has become the key in current research. At the same time, the rapid development of artificial intelligence technology, especially deep reinforcement learning algorithms, with its excellent perception and decision-making ability, performs well in decision-making problems in complex environments. In this paper, the collision avoidance algorithm of the USV in dynamic obstacle environment is designed. To solve the problem of insufficient obstacle complexity, a dynamic obstacle USV with certain randomness is added to the environment design. Aiming at the problems of overestimation and instability in DDPG algorithm, the network structure, parameter updating process and updating strategy are improved. At the same time, in order to improve the practicability of the algorithm, the reward function is further designed, and the motion characteristics and collision avoidance rules of the USV are fully considered.

关键词： USV Collision avoidance DDPG Intelligent control

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单一模态稀疏字典的压缩感知故障诊断方法

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振动．测试与诊断 2024年第3期44卷 486-493,617,618页

作者：张建宇王国峰张随征北京工业大学北京市先进制造技术重点实验室北京100124 北京科技大学机械工程学院北京100083 潍柴动力股份有限公司潍坊261061

针对压缩感知的算法流程中,传统的稀疏表示字典存在体量庞大、占用内存严重、构造效率低等问题,提出了一种基于单一模态Laplace小波字典的压缩感知故障诊断方法。首先,截取长信号中的特征片段,采用滑动频谱有效值识别信号的共振频带及... 详细信息

针对压缩感知的算法流程中,传统的稀疏表示字典存在体量庞大、占用内存严重、构造效率低等问题,提出了一种基于单一模态Laplace小波字典的压缩感知故障诊断方法。首先,截取长信号中的特征片段,采用滑动频谱有效值识别信号的共振频带及中心频率,确定Laplace小波的模态频率;其次,根据滑动峭度指标的分布曲线,提取包含单一冲击的片段信号,通过相关滤波法提取Laplace小波的模态阻尼;然后,通过补零插值建立特定长度的冲击原子,并基于循环移位策略,扩张成单一模态的Laplace小波稀疏字典;最后,结合高斯随机测量矩阵和正交匹配追踪算法,实现原始信号的压缩重构。仿真和实验结果表明,单一模态的小波字典具有更高的构造效率,占用内存更低,能够实现数据的有效压缩和特征重构,确保了噪声环境下的故障特征辨识。

关键词：滚动轴承单一模态循环移位 Laplace字典故障诊断

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华龙一号国际审查认证中结构完整性领域的实践和思考

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核动力工程 2024年第2期45卷 1-9页

作者：毛庆张涛徐晓岑鹏王国锋核电安全技术与装备全国重点实验室广东深圳518172 深圳中广核工程设计有限公司广东深圳518172 中广核工程有限公司广东深圳518172

为促进国际市场开发,中国广核集团有限公司开展了华龙一号核电技术方案英国通用设计审查(GDA)和欧洲用户要求认证(EUR)。核电厂构筑物、系统和设备的结构完整性是国际审查和认证的重点,为适应英国核安全监管和欧洲用户要求,项目团队采... 详细信息

为促进国际市场开发,中国广核集团有限公司开展了华龙一号核电技术方案英国通用设计审查(GDA)和欧洲用户要求认证(EUR)。核电厂构筑物、系统和设备的结构完整性是国际审查和认证的重点,为适应英国核安全监管和欧洲用户要求,项目团队采用分析法设计理念,以力学分析、试验和论证为关键手段,完成了英国版和欧洲版华龙一号的结构完整性分析评估和设计改进,全面满足了英国核安全监管和欧洲用户要求。通过华龙一号国际审查和认证,研究了结构完整性领域的相关技术要求,总结了审查过程中的实践和思考,可为华龙一号核电技术方案的持续改进和创新提供借鉴。

关键词：华龙一号(HPR1000) 英国通用设计审查(GDA) 欧洲用户要求认证(EUR) 结构完整性(SI)

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新质生产力赋能乡村公共文化高质量发展:理论逻辑、现实挑战与实现路径

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图书馆 2024年第9期 65-71页

作者：王国峰华中师范大学中国农村研究院武汉430079

加快构建和应用新质生产力是实现更高质量的乡村公共文化发展和加快乡村文化振兴的题中应有之义,新质生产力对推动乡村公共文化高质量发展具有必要性和可能性,需要科学把握二者的内在联系。然而,乡村公共文化高质量发展面临如下现实挑战... 详细信息

加快构建和应用新质生产力是实现更高质量的乡村公共文化发展和加快乡村文化振兴的题中应有之义,新质生产力对推动乡村公共文化高质量发展具有必要性和可能性,需要科学把握二者的内在联系。然而,乡村公共文化高质量发展面临如下现实挑战:公共文化内容不接地气,文化服务供需适配结构失衡;文化产品供给主体单一,文化自主供给内生动力不足;文化嵌入难以有效扎根,文化主体参与意识日趋弱化;文化潜能乘数效应偏弱,文化创新动能难以有效释放。因此,在新质生产力战略驱动下,我国亟需创新数智乡村文化内容,提升乡村公共文化高质量发展服务品质;培育新质劳动文化人才,激发乡村公共文化高质量发展参与动力;创新新质文化机制建设,增强乡村公共文化高质量发展持续动能;推动新质文化科技融合,加快新型文化业态助力高质量效能实现。

关键词：新质生产力乡村公共文化公共文化服务文化高质量发展文化振兴

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黄河九省(区)水资源绿色效率时空格局与影响因素研究

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人民黄河 2024年第5期46卷 85-90,97页

作者：王国峰胡金淼张帆山西财经大学国际贸易学院山西太原030006 中国科学院地理科学与资源研究所北京100101

为探索黄河九省(区)水资源绿色效率,采用SBM-DEA模型和Tobit模型对黄河九省(区)99个地级市水资源绿色效率的时空分布及影响因素进行分析。研究结果表明:1)黄河九省(区)水资源绿色效率整体呈上升趋势,下游的中原城市群和山东半岛城市群... 详细信息

为探索黄河九省(区)水资源绿色效率,采用SBM-DEA模型和Tobit模型对黄河九省(区)99个地级市水资源绿色效率的时空分布及影响因素进行分析。研究结果表明:1)黄河九省(区)水资源绿色效率整体呈上升趋势,下游的中原城市群和山东半岛城市群水资源绿色效率较高,上游的兰西城市群和宁夏沿黄城市群相对较低;2)黄河九省(区)水资源绿色效率空间集聚分布显著,“高-高”型城市主要集聚在下游经济较发达的省份,水资源绿色效率呈显著的正向空间自相关,并存在集聚现象和溢出效应;3)第一产业和第三产业规模、水资源禀赋和节水水平对水资源绿色效率提升具有显著积极影响,外商直接投资对水资源绿色效率的影响较为消极。

关键词：水资源绿色效率 SBM-DEA模型 Tobit模型黄河九省(区)

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