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初中科学数字化教学资源wise“绘图故事”的研究

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天津市教科院学报 2024年第3期36卷 3-12页

作者：闵辉华东师范大学教师教育学院上海200062 上海师范大学附属闵行第三中学上海201114

科学课程应重视图教学,还应积极开发相关的数字化教学资源。基于网络的科学探究环境wise提供的“绘图故事”项目,采用知识整合理论设计探究过程,促进学生主动建构新知识;创设科学故事线,激发学生在真实探究情境中学习;依据学习目标设计... 详细信息

科学课程应重视图教学,还应积极开发相关的数字化教学资源。基于网络的科学探究环境wise提供的“绘图故事”项目,采用知识整合理论设计探究过程,促进学生主动建构新知识;创设科学故事线,激发学生在真实探究情境中学习;依据学习目标设计数字资源序列,确保技术目标与探究学习目标相一致;针对学习阻障设计数字化认知工具,破解常规探究教学的难点;借助虚拟动画搭建表达和反思的支架,帮助学生自主探究。研究发现,采用知识整合理论设计数字化教学资源,可以有效促进八年级学生对运动图的理解并提高他们的知识整合水平,增益效果超过中等,为有效开发探究式初中科学数字化教学资源提供了具体指南,也为科学课程的图教学提供了数字化教学资源的样例。

关键词：科学课程数字化教学图教学 wise

回顾Resourcewise对2023年纸浆和造纸工业的预测

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中华纸业 2024年第3期45卷 13-15页

作者： Resourcewise Resourcewise

随着2023年的结束,是时候反思一下Resourcewise全球销售副总裁Matt Elhardt对2023年造纸业的深刻预测了。让我们借用此文章重温一下这些预测,看看它们在过去一年中是如何展开的。1欧洲的能源价格波动将产生赢家和输家能源价格对纸浆和... 详细信息

随着2023年的结束,是时候反思一下Resourcewise全球销售副总裁Matt Elhardt对2023年造纸业的深刻预测了。让我们借用此文章重温一下这些预测,看看它们在过去一年中是如何展开的。1欧洲的能源价格波动将产生赢家和输家能源价格对纸浆和造纸的生产成本有重大影响。

关键词：造纸工业能源价格波动销售副总裁造纸业生产成本 wise 纸浆

Study of flow characteristics within randomly distributed submerged rigid vegetation

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Journal of Hydrodynamics 2019年第2期31卷 358-367页

作者： Paromita Chakraborty Arindam Sarkar School of Civil Engineering Kalinga Institute of Industrial Technology(KIIT)Deemed to be UniversityBhubaneswarOdishaIndia School of Infrastructure Indian Institute of Technology(IIT)Bhubaneswar AurgulBhubaneswarOdishaIndia

Flow through submerged rigid vegetation has been studied both analytically and experimentally.The Reynolds stress,present in the governing equation,has been modeled using one of the turbulent stress equations,adopted in numerous cases.The adva ntage of this turbulent stress model is to replace the mixing length non linear term of the stress with a linear relatio n between stress and the velocity gradient.The velocity field and shear stress are obtained by solving the governing force balance equation numerically.A correlation,validated with the experimental results,has been developed for the relevant non-dimensional numbers.

关键词： Submerged vegetation Reynolds stress drag force stream wise velocity

A Fuzzy Decision Based WSN Localization Algorithm for wise Healthcare

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China Communications 2019年第4期16卷 208-218页

作者： Jiangyu Yan Ran Qiao Liangrui Tang Chenxi Zheng Bing Fan North China Electric Power University

wise healthcare is a typical application of wireless sensor network(WSN), which uses sensors to monitor the physiological state of nursing targets and locate their position in case of an emergency situation. The location of targets need to be determined and reported to the control center,and this leads to the localization problem. While localization in healthcare field demands high accuracy and regional adaptability, the information processing mechanism of human thinking has been introduced,which includes knowledge accumulation, knowledge fusion and knowledge expansion. Furthermore, a fuzzy decision based localization approach is proposed. Received signal strength(RSS) at references points are obtained and processed as position relationship indicators, using fuzzy set theory in the knowledge accumulation stage; after that, optimize degree of membership corresponding to each anchor nodes in different environments during knowledge fusion; the matching degree of reference points is further calculated and sorted in decision-making, and the coordinates of several points with the highest matching degree are utilized to estimate the location of unknown nodes while knowledge expansion. Simulation results show that the proposed algorithm get better accuracy performance compared to several traditional algorithms under different typical occasions.

关键词： WSN localization wise healthcare fuzzy decision algorithm reference points matching degree

Numerical investigation of plane Couette flow with weak spanwise rotation

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Science China(Physics,Mechanics & Astronomy) 2019年第4期62卷 71-83页

作者： YuHan Huang ZhenHua Xia MinPing Wan YiPeng Shi ShiYi Chen State Key Laboratory for Turbulence and Complex Systems College of Engineering Peking University Department of Engineering Mechanics Zhejiang University Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province Zhejiang University Department of Mechanics and Aerospace Engineering Southern University of Science and Technology

Direct numerical simulation of rotating plane Couette flow(RPCF) at Re_w= 1300 and Ro = 0.02 was performed with different mesh resolutions and different sizes of computation domain. Our results showed that a grid resolution in wall units with ?x^+=8.51, ?z^+= 4.26, ?y^+|_(min)= 0.0873 and ?y^+|_(max)= 3.89 is fine enough to simulate the problem at the present parameters. The streamwise length Lxand spanwise length Lzof the computational box have different impacts on the flow statistics, where the statistics were converged if Lxis longer than 8πh, while no converged results were obtained for different Lz. More importantly,our results with very long simulation time showed that a state transition would happen if L_x≥ 8πh, from a state with four pairs of roll cells to a state with three pairs of roll cells with L_z= 6πh. Each state could survive for more than 1500 h/U_w, and the flow statistics were different.

关键词： plane Couette flow span wise rotation state transition

A new almost periodic type of solutions of second order neutral delay differential equations with piecewise constant argument

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Science China Mathematics 2000年第4期43卷 371-383页

作者：袁荣 Department of Mathematics Beijing Normal University Beijing 100875 China

A definition of pseudo almost periodic sequence is given and the existence of pseudo al-most periodic seguence to difference equation is studied. Based on these, the existence of pseudo almost periodic solutions to ne... 详细信息

关键词： pseudo almost periodic solutions pseudo almost periodic sequences neutral delay equation piece- wise constant argument.

An efficient method to identify galaxy clusters by using SuperCOSMOS,2MASS and wise data

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Science China(Physics,Mechanics & Astronomy) 2014年第11期57卷 2168-2173页

作者： XU WeiWei WEN ZhongLue HAN JinLin National Astronomical Observatories Chinese Academy of Sciences University of Chinese Academy of Sciences

The survey data of Wide-field Infrared Survey Explorer(wise)provide an opportunity for the identification of galaxy clusters.We present an efficient method for detecting galaxy clusters by combining the wise data with SuperCOSMOS and 2MASS data.After performing star-galaxy separation,we calculate the number of companion galaxies around the galaxies with photometric redshifts previously estimated by the SuperCOSMOS,2MASS and wise data.A scaled richness Rscal 30 is set as a criterion to identify clusters.From a sky area of 275 deg2of the Sloan Digital Sky Survey Stripe 82 region,we identify 302 clusters in the redshift range of 0.1wise.

关键词： wise 星系团数字巡天调查数据数据估算 SDSS 探测器宽视场

何为卓越的教育创新项目——以72个wise“教育项目奖”荣膺项目为例

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教育发展研究 2022年第6期42卷 71-77页

作者：殷玉新沙晓雨徐月莹浙江师范大学教师教育学院金华321004

教育创新已经成为新时代全球共同关注的教育焦点议题和主旋律。世界教育创新峰会(wise)作为全球唯一致力于教育创新的跨领域国际会议和平台,其授予的“教育项目奖”是世界上最成功的教育创新项目代表。本研究以2009-2020年荣膺wise“教... 详细信息

教育创新已经成为新时代全球共同关注的教育焦点议题和主旋律。世界教育创新峰会(wise)作为全球唯一致力于教育创新的跨领域国际会议和平台,其授予的“教育项目奖”是世界上最成功的教育创新项目代表。本研究以2009-2020年荣膺wise“教育项目奖”的72个教育创新项目为例,通过深入分析发现,卓越的教育创新项目具有五个基本特征:具有新颖的教育理念、聚焦重大的教育问题、融入先进的教育技术、形成典型的教育模式、产生巨大的教育影响效应。据此,从教育理念、教育内容、教育技术、教育模式和制度环境等方面对我国开发和培育卓越教育创新项目提供建议和启示。

关键词：教育创新项目 wise 教育项目奖基本特征

The pointwise dimension of self-similar measures

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Chinese Science Bulletin 1999年第23期44卷 2136-2140页

作者： CHEN Ercai and XIONG Jincheng Department of Mathematics , Nanjing Normal University , Nanjing 210097, China Department of Mathematics , South China Normal University, Guangzhou 510631 , China Department of Mathematics Nanjing Normal University Nanjing China Department of Mathematics South China Normal University Guangzhou China

The problem about the existence of pointwise dimension of self-similar measure has been discussed. The Hausdorff dimension of the set of those points for which the pointwise dimension does not exist equals the dimenti... 详细信息

关键词： self-similar measure point wise dimension Hausdorff dimension multifractal symbolic space.