The current power grid is facing many challenges that it was not designed or engineered to handle which range from congestions and major blackouts to the overwhelming increase in demand and security concerns. The curr...The current power grid is facing many challenges that it was not designed or engineered to handle which range from congestions and major blackouts to the overwhelming increase in demand and security concerns. The current electric grid was established before the 1960’s. It is believed that the electric grid is the most complex and gigantic machine ever made in human history;it consists of wires, cables, towers, transformers and circuit breakers installed together in outdated manner. During the 60’s, computers and sensors were used to monitor and slightly control the grid;however, fifty years later these sensors are considered less than ideal. Presented here is a review of the smart grid communication network in terms of configuration, bandwidth and latency requirements as well as the technology used. We simulate the access layer of the smart grid net-work and show that no single available communication technology can be used for all layers of the smart grid;thus, different technologies for different layers are needed. A new protocol for optimizing the smart grid is recommended.展开更多
The monodisperse Au@Ag bimetallic nanorod is encapsulated by crosslinked poly( N-isopropylacrylamide)( PNIPAM) to produce thermo-responsive composite microgel with well-defined core-shell structure( Au@ Ag NR@ PNIPAM ...The monodisperse Au@Ag bimetallic nanorod is encapsulated by crosslinked poly( N-isopropylacrylamide)( PNIPAM) to produce thermo-responsive composite microgel with well-defined core-shell structure( Au@ Ag NR@ PNIPAM microgel)by seed-precipitation polymerization method using butenoic acid modified Au @ Ag NRs as seeds. When the temperature of the aqueous medium increases from 20℃ to 50℃,the localized surface plasmon resonance( LSPR) band of the entrapped Au @ Ag NR is pronouncedly red-shifted because of the decreased spatial distances between them as a result of shrinkage of the microgels,leading to their plasmonic coupling. The temperature tunable plasmonic coupling is demonstrated by temperature dependence of the surface enhanced Raman spectroscopy( SERS) signal of 1-naphthol in aqueous solution. Different from static plasmonic coupling modes from nanostructured assembly or array system of noble metals,the proposed plasmonic coupling can be dynamically controlled by environmental temperature. Therefore, the thermo responsive hybrid microgels have potential applications in mobile LSPR or SERS microsensors for living tissues or cells.展开更多
聚焦课程目标和课程内容、课程资源和教学设计、课程实施和教学过程以及课程评价,打造面向学科核心素养的智慧教学新生态:结合学习需求和社会需求调查,借鉴北京师范大学研发的21世纪核心素养5C模型和美国Thomas A. Angelo等开发的教学...聚焦课程目标和课程内容、课程资源和教学设计、课程实施和教学过程以及课程评价,打造面向学科核心素养的智慧教学新生态:结合学习需求和社会需求调查,借鉴北京师范大学研发的21世纪核心素养5C模型和美国Thomas A. Angelo等开发的教学目标编目方法,构建英语学科核心素养要素框架;借助智慧教学平台和语言诊断工具,优化教学设计,丰富课程资源,融学科核心素养培养于教学评过程;借鉴国际职业教育质量评价标准ISO29990,构建融合学科核心素养培养的“四横两纵六层多证据”学科教育质量评价体系,促成师生共创共生的智慧教学,提供《高等职业教育专科英语课程标准(2021年版)》实施路径。展开更多
Highly Resonant Power Transfer (HRPT) technology is currently receiving very significant attention from the industry and the smart power grid distribution community in particular. This technology ensures electrical po...Highly Resonant Power Transfer (HRPT) technology is currently receiving very significant attention from the industry and the smart power grid distribution community in particular. This technology ensures electrical power transmission between two points while controlling the level of transmitted power and ensures the immediate shutdown of the transmitted power in the event of a problem. This paper reviews the inductive power transfer method and describes the design of an ultra-compact PLA core electromagnetic coupler. The proposed architecture confines the magnetic field in a toroidal PLA core transformer, and by avoiding the use of heavy and bulky shielding plates, reduces magnetic losses and avoids the Curie point. As a result, the overall unit has a weight of 5 kg and a volume of only 0.013 m<sup>3</sup>. The electromagnetic coupler is capable of transferring a peak power of 150 kW with an operating frequency of 193 kHz, giving a satisfactory efficiency of 95%. The proposed novel system was first investigated through CST 3D numerical modelling to determine the electrical parameters of the coupler’s equivalent circuit and its efficiency, to verify its compatibility with the ICNIRP 2010 standard and to evaluate its temperature rise with an air-cooling system. Afterwards, the designed coupler was built with a 3D printing device and finally tested experimentally. Simulation and experimental results are compared and show a good agreement.展开更多
运用CiteSpace软件,对2013—2023年中国知网CNKI和Web of Science核心期刊数据库收录的智能家居领域研究型论文进行可视化分析,为我国智能家居研究提供参考。研究发现:在各发文国家中,美国在智能家居领域的贡献最大,我国的研究虽然具有...运用CiteSpace软件,对2013—2023年中国知网CNKI和Web of Science核心期刊数据库收录的智能家居领域研究型论文进行可视化分析,为我国智能家居研究提供参考。研究发现:在各发文国家中,美国在智能家居领域的贡献最大,我国的研究虽然具有规模,但目前影响力有限。在作者和机构合作方面,国外机构之间的合作程度较高,我国机构之间合作程度有待加强。在研究热点和趋势方面,国内外研究基本围绕着物联网技术、云计算技术、远程控制等,早期国内研究更强调远程控制和数字家庭,而国外研究注重智能电网、传感器和意见反馈;后期国内研究侧重传感器技术和人工智能交互,国外研究则侧重于能源利用和隐私保护。展开更多
文摘The current power grid is facing many challenges that it was not designed or engineered to handle which range from congestions and major blackouts to the overwhelming increase in demand and security concerns. The current electric grid was established before the 1960’s. It is believed that the electric grid is the most complex and gigantic machine ever made in human history;it consists of wires, cables, towers, transformers and circuit breakers installed together in outdated manner. During the 60’s, computers and sensors were used to monitor and slightly control the grid;however, fifty years later these sensors are considered less than ideal. Presented here is a review of the smart grid communication network in terms of configuration, bandwidth and latency requirements as well as the technology used. We simulate the access layer of the smart grid net-work and show that no single available communication technology can be used for all layers of the smart grid;thus, different technologies for different layers are needed. A new protocol for optimizing the smart grid is recommended.
基金National Natural Science Foundation of China(No.51373030)Chinese Universities Scientific Fund(No.CUSF-DH-D-2014023)
文摘The monodisperse Au@Ag bimetallic nanorod is encapsulated by crosslinked poly( N-isopropylacrylamide)( PNIPAM) to produce thermo-responsive composite microgel with well-defined core-shell structure( Au@ Ag NR@ PNIPAM microgel)by seed-precipitation polymerization method using butenoic acid modified Au @ Ag NRs as seeds. When the temperature of the aqueous medium increases from 20℃ to 50℃,the localized surface plasmon resonance( LSPR) band of the entrapped Au @ Ag NR is pronouncedly red-shifted because of the decreased spatial distances between them as a result of shrinkage of the microgels,leading to their plasmonic coupling. The temperature tunable plasmonic coupling is demonstrated by temperature dependence of the surface enhanced Raman spectroscopy( SERS) signal of 1-naphthol in aqueous solution. Different from static plasmonic coupling modes from nanostructured assembly or array system of noble metals,the proposed plasmonic coupling can be dynamically controlled by environmental temperature. Therefore, the thermo responsive hybrid microgels have potential applications in mobile LSPR or SERS microsensors for living tissues or cells.
文摘聚焦课程目标和课程内容、课程资源和教学设计、课程实施和教学过程以及课程评价,打造面向学科核心素养的智慧教学新生态:结合学习需求和社会需求调查,借鉴北京师范大学研发的21世纪核心素养5C模型和美国Thomas A. Angelo等开发的教学目标编目方法,构建英语学科核心素养要素框架;借助智慧教学平台和语言诊断工具,优化教学设计,丰富课程资源,融学科核心素养培养于教学评过程;借鉴国际职业教育质量评价标准ISO29990,构建融合学科核心素养培养的“四横两纵六层多证据”学科教育质量评价体系,促成师生共创共生的智慧教学,提供《高等职业教育专科英语课程标准(2021年版)》实施路径。
文摘Highly Resonant Power Transfer (HRPT) technology is currently receiving very significant attention from the industry and the smart power grid distribution community in particular. This technology ensures electrical power transmission between two points while controlling the level of transmitted power and ensures the immediate shutdown of the transmitted power in the event of a problem. This paper reviews the inductive power transfer method and describes the design of an ultra-compact PLA core electromagnetic coupler. The proposed architecture confines the magnetic field in a toroidal PLA core transformer, and by avoiding the use of heavy and bulky shielding plates, reduces magnetic losses and avoids the Curie point. As a result, the overall unit has a weight of 5 kg and a volume of only 0.013 m<sup>3</sup>. The electromagnetic coupler is capable of transferring a peak power of 150 kW with an operating frequency of 193 kHz, giving a satisfactory efficiency of 95%. The proposed novel system was first investigated through CST 3D numerical modelling to determine the electrical parameters of the coupler’s equivalent circuit and its efficiency, to verify its compatibility with the ICNIRP 2010 standard and to evaluate its temperature rise with an air-cooling system. Afterwards, the designed coupler was built with a 3D printing device and finally tested experimentally. Simulation and experimental results are compared and show a good agreement.
文摘运用CiteSpace软件,对2013—2023年中国知网CNKI和Web of Science核心期刊数据库收录的智能家居领域研究型论文进行可视化分析,为我国智能家居研究提供参考。研究发现:在各发文国家中,美国在智能家居领域的贡献最大,我国的研究虽然具有规模,但目前影响力有限。在作者和机构合作方面,国外机构之间的合作程度较高,我国机构之间合作程度有待加强。在研究热点和趋势方面,国内外研究基本围绕着物联网技术、云计算技术、远程控制等,早期国内研究更强调远程控制和数字家庭,而国外研究注重智能电网、传感器和意见反馈;后期国内研究侧重传感器技术和人工智能交互,国外研究则侧重于能源利用和隐私保护。
