检索结果-南通市图书馆

Study on influencing factors of ion current density measurement in corona discharge of HVDC transmission lines

维普期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2020年第4期22卷 1-7页

作者： Shiqiang LIU Shouzheng LI yuze jiang Nan jiang Jie LI Yan WU School of Electrical Engineering Dalian University of TechnologyDalian 116024People's Republic of China State Grid Shandong Electric Power Research Institute Jinan 250003People's Republic of China

The ground level ion current density produced by corona discharge in high voltage direct current(HVDC)transmission lines can reflect the operation status of the lines,but the distorted electric field at the edge of the Wilson plate seriously affects the measurement results of ion current *** order to measure the ground level ion current density accurately and directly,a new reduced scale wire-plate experimental device in which the Wilson plate is flush with the grounding plate is *** influence of protective annulus width and the height of the Wilson plate from the grounding plate on ground level ion current density are *** addition,the differences between the micro-current galvanometer method and the sampling resistance method in the measurement of ion current density are ***,the ground level ion current density distributions of unipolar and bipolar HVDC transmission lines are *** results show that the edge effect of the Wilson plate can be neglected when the width of protective annulus is less than 2 mm,and the ion current density is nonlinear with the height of the Wilson plate from the grounding ***,the internal resistance of the digital voltmeter seriously affects the measurement results and it is necessary to correct the ***,at the same applied voltage,the ground level ion current density in the negative conductor region is higher than that in the positive conductor region.

关键词： HVDC corona discharge reduced scale device Wilson plate ion current density

阿达木单抗引起Miller-Fisher综合征1例报道

在线全文

学校读者我要写书评

暂无评论

神经病学与神经康复学杂志 2024年第1期20卷 26-32页

作者：陈嘉慧姜羽泽解瑞川高丽上海交通大学医学院附属仁济医院神经内科

目的：报道1例使用阿达木单抗后出现变异型吉兰巴雷综合征（Guillain-Barrésyndrome,GBS）——Miller-Fisher综合征（Miller-Fisher syndrome,MFS）患者的临床资料，为更一步阐明肿瘤坏死因子-α(tumornecrosis factor-α,TNF-α)抑制剂与GBS的相关性提供新的理论依据。方法：报道1例克罗恩病患者使用阿达木单抗后出现MFS，包括临床表现、辅助检查、影像学检查和诊治过程等，并结合文献，分析此病例可能的发病机制。结果：男性患者，32岁，3年前确诊克罗恩病，使用英夫利西单抗3年，后转用阿达木单抗4月余。于末次使用阿达木单抗10 d后，以“双眼视物成双6 d”入院。查体显示双眼活动受限，头颅MRI平扫及增强扫描未见异常，血清及脑脊液周围神经病抗体谱检测提示血清抗GT1a抗体Ig G阳性、抗GQ1b抗体Ig G阳性。患者被诊断为GBS亚型的MFS，停用阿达木单抗，静脉注射人免疫球蛋白（intravenous immunoglobin,IVIG）冲击治疗，辅以维生素B12、维生素B1治疗，症状好转出院。结论：阿达木单抗可能引起GBS，但其机制仍没有阐明。临床上，需关注应用单克隆抗体治疗时，可能增加周围神经性疾病的发病风险。

关键词：阿达木单抗 TNF-α抑制剂 Miller-Fisher综合征吉兰巴雷综合征

Research on corona discharge suppression of high-voltage direct-current transmission lines based on dielectric-film-covered conductor

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Plasma Science and Technology 2021年第2期23卷 64-75页

作者： yuze jiang Qiying LI Xuekai ZHANG Diwen jiang Shiqiang LIU Bangfa PENG Jie LI State Grid Shandong Electric Power Research Institute Jinan 250003People's Republic of China State Grid Shandong Electric Power Company Jinan 250001People's Republic of China State Grid Jinan Jiyang Power Supply Company Jiyang 251400People's Republic of China School of Electrical Engineering Dalian University of TechnologyDalian 116024People's Republic of China

Corona discharge suppression for high-voltage direct-current(HVDC)transmission lines at line terminals such as converter stations is a subject that requires *** this paper,a method based on a conductor covered with dielectric film is proposed and implemented through a bench-scale *** with the bare conductor,the corona discharge suppression effect of the dielectric-film-covered conductor under positive polarity is studied from the composite field strength and ion current density using a line-plate experimental *** influences of film thickness and film material on the corona discharge suppression effect are *** charge accumulation and dissipation characteristics of different film materials are also *** results show that the conductor covered with dielectric film has excellent ability to inhibit corona *** ground-level composite field strength of the conductor covered with dielectric film is lower than its nominal field strength,and its ion current density is at the nA m^(−2) *** corona threshold voltage can be promoted by increasing the film thickness,but the ability to inhibit corona discharge becomes *** larger the surface electric field strength,the more charge accumulated,but the faster the charge dissipation *** with polyvinyl chloride film,cross-linked polyethylene film has stronger charge accumulation ability and slower charge dissipation rate,which can better restrain the corona discharge of HVDC transmission lines.

关键词： high-voltage direct-current(HVDC)transmission lines corona discharge suppression dielectric-film-covered conductor composite field strength ion current density

Personalized Thermal Comfort Model with Decision Tree

在线全文

学校读者我要写书评

暂无评论

Intelligent Control and Automation 2019年第4期10卷 168-177页

作者： yuze jiang Cushing Academy Ashburnham MA USA

Thermal comfort is the expression of people’s satisfaction with the indoor temperature and is related to people’s working efficiency and health. In this way, it is necessary to construct a suitable environment for the user. However, even if adaptive thermal comfort has been developing rapidly for the past decades, most of the models are still developed based on simple statistical analysis such as regression models, which may not capture the complex relations between thermal comfort and the indoor thermal environment as well as differences between individual characteristics. Hence, in order to improve the accuracy of the adaptive thermal comfort model, this paper proposes a decision-tree-based thermal comfort model developed with the subset of the RP884 dataset. Then, a comfort-based HVAC controller was developed with the thermal sensation prediction results with the trained model above. As a result, the proposed controller indeed improves occupant’s thermal comfort model.

关键词： Thermal Comfort Decision Trees HVAC

Color coded metadevices toward programmed terahertz switching

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

Light(Science & Applications) 2024年第7期13卷 1383-1392页

作者： Weibao He Xiang’ai Cheng Siyang Hu Ziheng Ren Zhongyi Yu Shun Wan yuze Hu Tian jiang College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangshaChina. Nanhu Laser Laboratory National University of Defense TechnologyChangshaChina. Hunan Provincial Key Laboratory of High Energy Laser Technology National University of Defense TechnologyChangshaChina. Institute for Quantum Science and Technology College of ScienceNational University of Defense TechnologyChangshaChina

Terahertz modulators play a critical role in high-speed wireless communication,non-destructive imaging,and so on,which have attracted a large amount of research ***,all-optical terahertz modulation,an ultrafast dynamical control approach,remains to be limited in terms of encoding and *** we experimentally demonstrated an optical-programmed terahertz switching realized by combining optical metasurfaces with the terahertz metasurface,resulting in 2-bit dual-channel terahertz *** terahertz metasurface,made up of semiconductor islands and artificial microstructures,enables effective all-optical programming by providing multiple frequency channels with ultrafast modulation at the nanosecond ***,optical metasurfaces covered in terahertz metasurface alter the spatial light field distribution to obtain color *** to the time-domain coupled mode theory analysis,the energy dissipation modes in terahertz metasurface can be independently controlled by color excitation,which explains the principle of 2-bit encoding *** work establishes a platform for all-optical programmed terahertz metadevices and may further advance the application of composite metasurface in terahertz manipulation.

关键词： terahertz surface excitation

Comparative Study of Dielectric Barrier Discharge Reactors on Elemental Mercury Oxidation and Energy Performance

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

Comparative Study of Dielectric Barrier Discharge Reactors o...

第十六届全国等离子体科学技术会议暨第一届全国等离子体医学研讨会

作者： Jiu Tao An Ke Feng Shang Na Lu yuze jiang Jie Li Yan Wu College of Electrical Engineering Dalian University of Technology Key Laboratory of Industrial Ecology and Environmental Engineering Ministry of Education of the People's Republic of China Shandong Electric Power Research Institute

Introduction Mercury has been attracted extensive attention because of its persistence,and bioaccumulation in the *** barrier discharge(DBD) plasma has been receiving great emphasis for oxidation Hg[1].DBD reactor can be divided into four types: concentric cylinder type discharge,surface discharge,coplanar discharge and packed-bed discharge[2].Different DBD reactors may have different plasma physical and electrical *** the practical use and the optimal design of DBD reactors,it is highly important to investigate the differences both the plasma reactors in the physical properties and chemical properties. Experimental

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

脉冲放电脱硫产物的收集

环境科学 2000年第2期21卷 50-53页

作者：姜雨泽吴彦王宁会逯明福大连理工大学电磁系静电与特种电源研究所大连116024

实验结果表明利用给反应器加直流基压收集脱硫产物是可行的．产物收集效率随直流基压和停留时间的增加而增加，在本实验条件下，最高收集效率达到９５．１％．加直流基压后，脉冲电压、电流波形基本不变，放电增强，脱硫效果提高．加... 详细信息

实验结果表明利用给反应器加直流基压收集脱硫产物是可行的．产物收集效率随直流基压和停留时间的增加而增加，在本实验条件下，最高收集效率达到９５．１％．加直流基压后，脉冲电压、电流波形基本不变，放电增强，脱硫效果提高．加直流基压可使反应器在脱硫的同时有效收集产物．

关键词：脉冲电晕放电脱硫产物收集气溶胶烟气处理

等离子体射流对染污高温硫化硅橡胶憎水特性的影响

在线全文

学校读者我要写书评

暂无评论

高电压技术 2015年第1期41卷 262-267页

作者：张若兵苏善诚姜雨泽刘辉关志成清华大学深圳研究生院深圳518055 国网山东省电力公司电力科学研究院济南250002

为研究改善染污高温硫化硅橡胶(HTV)憎水性的方法,采用大气压下的介质阻挡放电(DBD)产生低温等离子体射流,对高岭土染污后的HTV试片表面进行处理。在不同处理时间、盐密及灰密情况下,测量了染污高温硫化硅橡胶表面的接触角,研究其随时... 详细信息

为研究改善染污高温硫化硅橡胶(HTV)憎水性的方法,采用大气压下的介质阻挡放电(DBD)产生低温等离子体射流,对高岭土染污后的HTV试片表面进行处理。在不同处理时间、盐密及灰密情况下,测量了染污高温硫化硅橡胶表面的接触角,研究其随时间的变化情况。研究发现:染污高温硫化硅橡胶表面在经过较短时间的低温等离子体射流处理之后,其憎水性得到了明显改善,接触角>100°;并且随着迁移时间的增加,其憎水迁移速度明显加快,迁移5 h后接触角即>110°。在重污秽情况下,随着处理时间的增加,其憎水性也得到相应改善,但效果并不理想,接触角普遍<35°。通过对照试验及扫描电镜(SEM)成像可以得到该现象产生的原因是射流等离子体与HTV相互作用,加速了HTV憎水迁移过程导致的。

关键词：低温等离子体射流污秽高温硫化硅橡胶憎水性接触角扫描电镜

在线全文

学校读者我要写书评

暂无评论

竞技武术新规则变化对武术套路发展的导向

吉林体育学院学报 2005年第2期21卷 130-131页

作者：姜玉泽烟台师院体育学院山东烟台264025

采用文献资料法、数理统计法和逻辑推理等方法,从解读2003年武术套路竞赛规划(试行)入手,认为在新规则导向下,竞技武术套路的发展趋势为:1)技术继续向着“高、新、难、美”发展;2)在技术动作创新的基础上,必须兼顾动作质量和演练水平,... 详细信息

采用文献资料法、数理统计法和逻辑推理等方法,从解读2003年武术套路竞赛规划(试行)入手,认为在新规则导向下,竞技武术套路的发展趋势为:1)技术继续向着“高、新、难、美”发展;2)在技术动作创新的基础上,必须兼顾动作质量和演练水平,针对新规则的导向作用,为竞技武术国际化健康发展提出有益的建议。

关键词：新规则竞技武术套路文献资料法数理统计法 2003年逻辑推理竞赛规划规则导向发展趋势动作创新演练水平动作质量导向作用健康发展国际化技术