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面向小学数学的思维能力训练有效果吗?--基于51篇国内外实证研究的元分析

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现代教育技术 2024年第6期34卷 91-99页

作者：黄月曲新婷董艳北京邮电大学人文学院北京100876 北京师范大学教育学部北京100875

在面向思维能力培养的基础教育教学中,研究者常基于数学学科开展有针对性的思维能力训练,但学习效果不一。为此,文章基于51篇相关的实验与准实验研究所得数据,采用元分析方法探讨了小学数学思维能力训练的学习效果。结果显示:我国面向... 详细信息

在面向思维能力培养的基础教育教学中,研究者常基于数学学科开展有针对性的思维能力训练,但学习效果不一。为此,文章基于51篇相关的实验与准实验研究所得数据,采用元分析方法探讨了小学数学思维能力训练的学习效果。结果显示:我国面向小学数学的思维能力训练有中上程度的正向效果,但其效果在低阶或高阶思维能力上并无显著差异;不同数学课程内容与训练策略均能产生显著差异;学段、训练周期和是否使用信息技术工具并无显著差异。文章根据研究结果提出了有效开展思维能力训练的对策和建议,以期厘清研究脉络,并为实践者开展循证教学提供参考。

关键词：小学数学思维能力训练元分析学习效果

大数据驱动的快消品终端拜访“云-边”联动决策与优化

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机械工程学报 2024年第6期60卷 58-68页

作者：赵阔王皂琦潘臻信潘扬华张中飞屈挺暨南大学智能科学与工程学院珠海519070 暨南大学信息科学技术学院广州510000 暨南大学物联网与物流工程研究院珠海519070 暨南大学管理学院广州510000

随着我国的快消品消费市场快速增长,快消品公司的终端拜访成本显著增加,同时终端拜访场景面临着终端信息的实时获取、动态的决策与客户需求动态响应的问题。提出针对快消品终端拜访问题的“云边联动信息架构”,设计“动态云边联动机制”... 详细信息

随着我国的快消品消费市场快速增长,快消品公司的终端拜访成本显著增加,同时终端拜访场景面临着终端信息的实时获取、动态的决策与客户需求动态响应的问题。提出针对快消品终端拜访问题的“云边联动信息架构”,设计“动态云边联动机制”,同时结合深度强化学习算法优化系统决策。经试验仿真结果表明,有效地减少终端拜访人员的在途里程数。针对快消品终端拜访场景,能有效地提高公司终端拜访人员的服务水平,维系客情关系,从而达到提高销量、提升订单转化率等目的。

关键词：终端拜访联动决策强化学习

Parameter Study on a Composite Sound-Absorbing Structure Liner in Elevator Shafts

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Journal of Renewable Materials 2023年第9期11卷 3433-3446页

作者： ting qu Bo Wang Hequn Min Key Laboratory of Urban and Architectural Heritage Conservation of Ministry of Education School of ArchitectureSoutheast UniversityNanjing210096China

With the growing global environmental awareness,the development of renewable and green materials has gained increased worldwide interest to substitute conventional materials and are favorable for sustainable economic development.This paper proposed a novel eco-friendly sound absorbing structure(NSAS)liner for noise reduction in elevator shafts.The base layer integrated with the shaft walls is a damping gypsum mortarboard,and a rock wool board and a perforated cement mortarboard are used to compose the NSAS.Based on the acoustic impedance theory of porous materials and perforated panels,the sound absorption theory of the NSAS was proposed;the parameter effects of the rock wool board(flow resistivity,porosity,structure factor)and perforated panel(perforated rates,thickness,density,perforated diameter)on NSAS absorption were discussed theoretically for absorption improvement,and experiments were also conducted.Numerical results showed that the perforation rate,the thickness of the perforated plate,and the porosity,flow resistance,and volume density of the rock wool board played a key issue in the absorption performances of the NSAS.Experiments verified the accuracy of the proposed theoretical model.Wideband sound absorption performance of the NSAS at frequencies between 500–1600 Hz was achieved in both numerical analysis and experiments,and the sound absorption coefficient was improved to 0.72 around 1000 Hz after parameter adjustments.The NSAS proposed in this paper can also be made of other renewable materials with preferable structure strength and still has the potential to broaden the absorption bandwidth.It can provide a reference for controlling the elevator shaft noise.

关键词： Elevator shafts sound-absorbing liner porous material ﬂow resistivity acoustic impedance

Rule based vs Optimization based Workload Control with and without Exogenous Lead Times:An Assessment by Simulation

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Journal of Systems Science and Systems Engineering 2023年第5期32卷 553-570页

作者： Mingze Yuan ting qu Matthias Thürer Lin Ma Lei Liu School of Management Jinan UniversityGuangzhou510632China GBA and B&R International Joint Research Center for Smart Logistics Jinan UniversityZhuhai519070China School of Intelligent Systems Science and Engineering Jinan UniversityZhuhai519070China Institute of Physical Internet Jinan UniversityZhuhai519070China Factory Planning and Intralogistics Chemnitz University of TechnologyChemnitz09125Germany Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHong Kong999077China

Order release is a key production planning and control function,specifically in high variety contexts.A large literature on release methods that balance the workload consequently emerged.These Workload Control methods can be rule based,using a simple greedy heuristic,optimization based or optimization based with lead times that are exogenous.Although all three types of methods have the same objective,their performance has never been compared.Using simulation,this study shows that a better on time delivery performance of jobs can be achieved by the two optimization based release methods.Most importantly,optimization based methods that assume lead times to be exogenous significantly outperform alternative methods in terms of tardiness performance.Rule based and optimization based Workload Control without exogenous lead times overemphasize average lateness reduction,which leads to sequence deviations that offset performance improvements through balancing.In contrast,Workload Control methods that assume lead times to be exogenous limit sequence deviations,which leads to a significant reduction in dispersion of lateness.This has important implication for the future design of order release methods,and managerial practice.

关键词： Workload control order release production planning production control make-to-order production

Passion for Cultural Heritage——Make More People Realize Beauty of ‘Uselessness＂

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China & The World Cultural Exchange 2018年第3期84卷 39-40页

作者： qu ting Liu Wei

Six New Archaeologwal Discoveries in China in 2015

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China & The World Cultural Exchange 2016年第3期82卷 39-40页

作者： Yi Ling qu ting

Heroes of the Fight Against Covid-19

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求是:英文版 2021年第1期13卷 54-62页

作者： Chen Fang qu ting Chen Cong Dong Ruifeng 不详

Hero is a weighty word,but one that has truly become familiar to every Chinese person in the great battle against Covid-19.Zhong Nanshan,Zhang Boli,Zhang Dingyu,and Chen Wei are the outstanding representatives of China’s heroes.Standing up at a time of crisis,they risked their lives to fight the epidemic,manifesting the determination of the 1.4 billion Chinese people to come together and bravely push forward.

关键词： push truly fight

Modeling of contact temperatures and their influence on the tribological performance of PEEK and PTFE in a dual-pin-ondisk tribometer

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Friction 2023年第4期11卷 546-566页

作者： Zhibin LIN ting qu Ke ZHANG Qingbin ZHANG Shengdao WANG Guibin WANG Bingzhao GAO Guowei FAN State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130025China Key Laboratory of High Performance Plastics Ministry of EducationJilin UniversityChangchun 130012China Clean Energy Automotive Engineering Center Tongji UniversityShanghai 201804China College of Instrumentation and Electrical Engineering Jilin UniversityChangchun 130061China

The direct blending of polyether ether ketone(PEEK)with a solid lubricant such as polytetrafluoroethylene(PTFE)improves its tribological performance,but compromises its outstanding mechanical properties and processability.While these negative effects might be circumvented via the hybrid wear method,the influence of the contact temperature between multiple sliding components acting together is not fully understood.Herein,an analytical temperature model considering the influence of both micro-and macro-thermal behavior is extended to predict the contact temperature of a dual-pin-on-disk hybrid wear system.The interactions between several heat sources are investigated and experimentally verified.The analytical results show that the nominal temperature rise of the shared wear track is determined by the combined effect of the heat generated by both pin components,while the rise in flash temperature at the region in contact with each pin component is dependent upon its individual characteristics and working conditions.Hence,while different temperature peaks can coexist in the shared wear track,the maximum value dominates the performance of the system.For the experimentally investigated PEEK–PTFE–steel hybrid wear system,the formation of tribofilms is blocked,and the hybrid wear system fails,when the peak temperature exceeds the glass transition temperature of both pins due to an increase in applied load.

关键词： contact temperature frictional heating dual-pin-on-disk hybrid wear

典型污水处理工艺对抗生素污染特性影响的研究

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干旱环境监测 2024年第2期38卷 84-91页

作者：夏波罗霜陈历铌王妍曲洁婷四川省成都生态环境监测中心站四川成都610000 成都市污染源监测中心四川成都610000

为探究不同污水处理工艺对抗生素污染特性的影响,以四大类9种较常见抗生素为研究对象,综合比较AO+三级絮凝、A2O、A2O+纤维滤池、CASS污水处理工艺下处理设施进、出水及剩余污泥中抗生素的分布和去除情况,采用风险熵值法对外排水环境受... 详细信息

为探究不同污水处理工艺对抗生素污染特性的影响,以四大类9种较常见抗生素为研究对象,综合比较AO+三级絮凝、A2O、A2O+纤维滤池、CASS污水处理工艺下处理设施进、出水及剩余污泥中抗生素的分布和去除情况,采用风险熵值法对外排水环境受纳水体进行生态风险评估。结果表明:混合污水来源的处理厂进出水中抗生素总浓度均较高,且最高浓度基本为磺胺类;各污水处理工艺和污泥吸附均能实现部分抗生素的去除,AO+三级絮凝沉淀的去除效率处理工艺最佳达71.1%,A2O最低仅为44.1%;经典型处理工艺的外排废水中目标抗生素对受纳水体几乎不构成生态风险,适当关注OFL。

关键词：抗生素污水处理工艺污泥吸附生态风险