检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

Wi-Fi业务的技术推广方案探讨

信息通信技术 2008年第2期2卷 68-74页

作者：邹志永中国网络通信集团公司湖南省分公司长沙410016

今年是无线宽带技术发展的关键一年,无线频谱规划、网络演进、应用推广都将进入一个重要阶段。本文在介绍Wi-Fi的IEEE802.11技术特点和标准的基础上,给出了湖南网通Wi-Fi业务解决方案,并探讨了Wi-Fi与WiMAX、3G融合等技术推广方案。

关键词：无线宽带 Wi-Fi 融合技术推广

Methane activation by[LnO]^(+):the 4f orbital matters

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第1期67卷 330-335页

作者： Bowei Yuan Jingxiang zou Mincheng Yu Shaodong Zhou College of Chemical and Biological Engineering Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture TechnologyZhejiang UniversityHangzhou 310027China Zhejiang Provincial Innovation Center of Advanced Chemicals Technology Institute of Zhejiang University–QuzhouQuzhou 324000China Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005China

Gas-phase reactions of[LnO]^(+)with methane have been studied by using inductively coupled plasma-mass spectrometer(ICP-MS)combined with quantum chemical *** indicate that the[LnO]^(+)(Ln=Sm-Lu)ions are able to activate methane to generate methyl *** particular,[EuO]^(+)and[YbO]^(+)exhibit the highest ***,ab initio computations reveal a novel HAT process operating in the absence of a terminal oxygen radical,as mediated by[EuO]^(+)and[YbO]^(+).Such a process diverges from previous findings on the methane activation by metal oxide clusters,not only on the electronic pattern during the course of hydrogen transfer,but also on the important role that 4f electrons *** associated electronic origins have been discussed,and the well-designed 4f electron occupation may turn to be a promising approach in constructing lanthanide involved catalysts.

关键词： lanthanide oxides methane activation 4f orbitals quantum chemical calculation ion-molecule reaction

Energy-based Directional Pilot Protection for Distribution Networks with IBDGs Considering Unmeasured Load Switching

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2024年第1期10卷 139-150页

作者： Chenghan Zhou Guibin zou Shuo Zhang Xuhui Wen Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong UniversityJinan 250061China

Inverter-based distributed generations(IBDGs)are the main approach to utilizing clean energy in distribution networks(DNs).Compared with synchronous source,fault response of IBDG is very *** a result,in DNs with high penetration of IBDGs,legacy protection schemes will no longer be *** this paper,an energy-based directional pilot protection scheme suitabie for DNs with IBDGs is *** scheme considers the large range of phase angle caused by IBDG integration and uses improved energy polarity criterion to determine fault *** addition,magnitude of energy is used to distinguish between faults and load switching to overcome maloperation of directional pilot protection caused by internal unmeasured load *** proposed scheme first uses local measured information to determine fault direction sign and then exchanges the direction sign with the remote *** scheme does not require high-bandwidth communication and strict data synchronization,so it can be implemented at a low ***,simulation studies verify effectiveness of the proposed scheme.

关键词： Distribution network energy polarity inverterbased distributed generation pilot protection unmeasured load

Real-time Energy Management Method for Electric-hydrogen Hybrid Energy Storage Microgrids Based on DP-MPC

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2024年第1期10卷 324-336页

作者： Qi Li Xueli zou Yuchen Pu Weirong Chen School of Electrical Engineering Southwest Jiaotong UniversityChengdu 611756China

With the increasing presence of intermittent energy resources in microgrids,it is difficult to precisely predict the output of renewable resources and their load *** order to realize the economical operations of the system,an energy management method based on a model predictive control(MPC)and dynamic programming(DP)algorithm is *** method can reasonably distribute the energy of the battery,fuel cell,electrolyzer and external grid,and maximize the output of the distributed power supply while ensuring the power balance and cost optimization of the *** on an ultra-shortterm forecast,the output power of the photovoltaic array and the demand power of the system load are *** offline global optimization of traditional dynamic programming is replaced by the repeated rolling optimization in a limited period of time to obtain power values of each unit in the energy storage *** with the traditional DP,MILP-MPC and the logic based real-time management method,the proposed energy management method is proved to be feasible and effective.

关键词： Electric-hydrogen hybrid energy economic energy management improved dynamic programming microgrid model predictive control

A visible-light-assisted Pd/TiO_(2)gas sensor with carbon nanotubes electrodes for trace formaldehyde detection

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第1期43卷 257-266页

作者： Can Liu Qiao-Qiao zou Bin Liu Yong Zhang School of Physics and Optoelectronics Xiangtan UniversityXiangtan 411105China Hunan Institute of Advanced Sensing and Information Technology Xiangtan UniversityXiangtan 411105China School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105China

Owing to the ppb-level detection standard toward the toxic and harmful gas,the detection of trace gases has become an important subject in the field of indoor environment ***,the traditional resistive gas sensors hardly meet the requirement due to the weak signal generated by trace gas molecules that are difficult to ***,a visible-light-assisted Pd/TiO_(2)gas sensor is proposed to endow the effective detection of trace formaldehyde(HCHO)gas without heating *** from the enhanced photocatalytic properties of TiO_(2)by Pd decoration,the visible-light-assisted Pd/TiO_(2)gas sensor can detect the HCHO gas as low as80×10^(–9)at room *** successful preparation of nanoscale TiO_(2)sensing layer is facilitated by the ultrathin carbon nanotube interdigital electrode in the gas sensor,which avoids the discontinuity of the sensing layer caused by the excessive thickness of the traditional metal *** addition,the whole preparation process of the Pd/TiO_(2)gas sensor with carbon nanotube electrodes is compatible with mainstream CMOS fabrication technology,which is expected to realize the batch fabrication and micro-integrated application of gas *** is expected that our work can provide a new strategy for the batch preparation of high-performance trace HCHO gas sensors and their future applications in portable electronic devices such as smartphones.

关键词： Visible-light-assisted gas sensor Pd/TiO_(2) Trace HCHO detection Carbon nanotubes electrodes

在线全文

学校读者我要写书评

暂无评论

齐硕姆的部分学的本质主义理论

中南大学学报（社会科学版） 2016年第3期22卷 22-27页

作者：邹志勇李似珍铜仁学院武陵民族文化研究中心贵州铜仁554300 华东师范大学哲学系上海200241

齐硕姆的部分学的本质主义理论认为,如果任何事物是某个整体的一部分,那么只要该整体存在,它就是该整体的一部分,该整体在它存在的每一个可能世界中都具有该部分,对象的部分对于该对象是本质性的。他认为我们必须区分严格的哲学意义上... 详细信息

齐硕姆的部分学的本质主义理论认为,如果任何事物是某个整体的一部分,那么只要该整体存在,它就是该整体的一部分,该整体在它存在的每一个可能世界中都具有该部分,对象的部分对于该对象是本质性的。他认为我们必须区分严格的哲学意义上的真部分和松散的日常意义上的非真部分,失去真部分将使得一对象改变它的身份,但失去非真部分,这个对象的身份却仍将保持住。齐硕姆的这个理论可以用于处理提修斯之船难题,即:在一对象的每一部分都相继被替换后,该对象是否仍保持它的身份。

关键词：齐硕姆部分学的本质主义接续之是提修斯之船难题

在线全文

学校读者我要写书评

暂无评论

基于虚拟仪器的压电陶瓷驱动技术研究

光学技术 2012年第5期38卷 534-538页

作者：李超良高爱华邹志勇西安工业大学陕西省薄膜技术与光学检测重点实验室西安710032

针对压电陶瓷驱动器的非线性应变,以压电陶瓷微位移驱动原理为基础,分析了扫频激光器腔长控制原理;在硬件时钟的定时下,分析了压电陶瓷的驱动特性,并通过调整驱动信号的步长电压来调节压电陶瓷的非线性。设计了基于虚拟仪器的控制系统,... 详细信息

针对压电陶瓷驱动器的非线性应变,以压电陶瓷微位移驱动原理为基础,分析了扫频激光器腔长控制原理;在硬件时钟的定时下,分析了压电陶瓷的驱动特性,并通过调整驱动信号的步长电压来调节压电陶瓷的非线性。设计了基于虚拟仪器的控制系统,并对线性化方法进行了原理分析和实验。实验结果表明,该测量系统可以使压电陶瓷在其伸长范围内线性地伸长。

关键词：激光器压电陶瓷微位移驱动驱动特性

Automatic Generation of Artificial Space Weather Forecast Product Based on Sequence-to-sequence Model

在线全文

学校读者我要写书评

暂无评论

空间科学学报 2024年第1期44卷 80-94页

作者：罗冠霆 zou Yenan CAI Yanxia State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049 Key Laboratory of Science and Technology on Environment Space Situation Awareness Chinese Academy of SciencesBeijing 100190

Both analyzing a large amount of space weather observed data and alleviating personal experience bias are significant challenges in generating artificial space weather forecast *** the use of natural language generation methods based on the sequence-to-sequence model,space weather forecast texts can be automatically *** conduct our generation tasks at a fine-grained level,a taxonomy of space weather phenomena based on descriptions is ***,our MDH(Multi-Domain Hybrid)model is proposed for generating space weather summaries in two *** model is composed of three sequence-to-sequence-based deep neural network sub-models(one Bidirectional Auto-Regressive Transformers pre-trained model and two Transformer models).Then,to evaluate how well MDH performs,quality evaluation metrics based on two prevalent automatic metrics and our innovative human metric are *** comprehensive scores of the three summaries generating tasks on testing datasets are 70.87,93.50,and 92.69,*** results suggest that MDH can generate space weather summaries with high accuracy and coherence,as well as suitable length,which can assist forecasters in generating high-quality space weather forecast products,despite the data being starved.

关键词： Space weather Deep learning Data-to-text Natural language generation

Spontaneous current relaxation in NBI heated plasmas on EAST

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2018年第9期20卷 3-7页

作者： Weixing DING Haiqing LIU Jinping QIAN Shoubiao ZHANG D L BROWER zhiyong zou Weiming LI Yao YANG Long ZENG Jinlin XlE Ping ZHU Changxuan YU Ting LAN Shouxin WANG Hui LIAN Yinxian JIE Liqun HU and Baonian WAN University of California Los Angeles Los AngelesCalifornia 90095United States of America Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People＇s Republic of China University of Science and Technology of China Hefei 230026People＇s Republic of China

We report on current profile evolution in EAST NBI driven plasmas where two neutral beams are injected,one during the current ramp phase and the second during *** the end of the current ramp phase,it is found that a flat q profile with q0-1 is achieved with low magnetic shear in the *** is observed that plasma current and density both relax much faster than resistive time,even in the absence of sawtooth activity when H-L transition *** fluctuations associated with magnetic perturbations（3/2） as a precursor to the H-L transition are *** is likely that these modes play a role in fast current transport.

关键词： current transport NBI plasma density fluctuations magnetic perturbations EAST