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Axial uniformity diagnosis of coaxial surface wave linear plasma by optical emission spectroscopy

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Plasma Science and Technology 2022年第2期24卷 80-92页

作者： Wenjin ZHANG Xinyu WEI Longwei CHEN qifu lin Yiman JIANG Chengzhou LIU Jiafang SHAN Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People's Republic of China University of Science and Technology of China Hefei 230026People's Republic of China Institute of Energy Hefei Comprehensive National Science CenterHefei 230031People's Republic of China

The coaxial surface wave linear plasma with preeminent axial uniformity is developed with the 2.45 GHz microwave *** optical emission spectroscopy,parameters of the argon linear plasma with a length over 600 mm are diagnosed under gas pressure of 30 and 50 Pa and different microwave *** spectral lines of argon and Hβ(486.1 nm)atoms in excited state are observed for estimating electron excitation temperature and electron *** bands in305–310 nm of diatomic OH(Σ-Π+A X22 i)radicals are used to determine the molecule rotational ***,the axial uniformity of electron density and electron excitation temperature are analyzed emphatically under various *** results prove the distinct optimization of compensation from dual powers input,which can narrow the uniform coefficient of electron density and electron excitation temperature by around 40%and 22%*** the microwave power increasing,the axial uniformity of both electron density and electron excitation temperature performs ***,the fluctuation of electron density along the axial direction appeared with higher gas *** axial uniformity of coaxial surface wave linear plasma could be controlled by pressure and power for a better utilization in material processing.

关键词： surface wave plasma low temperature plasma optical emission diagnosis

Characteristics of DC arcs in a multi-arc generator and their application in the spheroidization of SiO2

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Chinese Physics B 2020年第12期29卷 367-376页

作者： qifu lin Yanjun Zhao Wenxue Duan Guohua Ni Xingyue Jin Siyuan Sui Hongbing Xie Yuedong Meng Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China Science Island Branch of Graduate School University of Science and Technology of ChinaHefei 230026China AnHui Province Key Laboratory of Medical Physics and Technology Hefei 230031China

We investigate characteristics of multi-arc torches with three pairs of electrodes(three cathodes and three anodes)and their performance on the spheroidization of SiO2 *** effect of electrode arrangement,including adjacent pattern(AD pattern,adjacent electrodes powered by one power supply)and opposite pattern(OP pattern,opposite electrodes powered by one power supply),on the dynamics of arc plasma is investigated based on synchronous acquisition of electrical and optical *** results show that both the voltage and spatial distribution of each arc of multiple arcs are more stable compared with those of a single *** fluctuation of an arc in multiple arcs mainly comes from the small-scale arc-to-arc restrikes among multiple ***,these arc-to-arc restrikes occur more frequently among multiple arc columns in OP pattern than in AD ***,the high-temperature area of the central region of arc chamber in OP pattern is larger than that in AP *** the spheroidization of SiO2 in this multi-arc generator,the spheronization degrees of plasma treated silica in OP pattern are at least 20%higher than those in AD pattern.

关键词： characteristics multiple arcs arc volume spheroidization

Characteristics of non-thermal AC arcs in multi-arc generator

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Chinese Physics B 2019年第12期28卷 255-267页

作者： qifu lin Yanjun Zhao Wenxue Duan Guohua Ni Xinyue Jin Siyuan Sui Hongbing Xie Yuedong Meng Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China AnHui Province Key Laboratory of Medical Physics and Technology Hefei 230031China

To obtain large-volume non-thermal arc plasma(NTAP), a multiple NTAP generator with three pairs of electrodes has been developed. The arc plasma characteristics, including dynamic process, spatial distribution, and rotation velocity in the discharge zone, were investigated by high speed photograph and image processing methods. The results showed that the dynamic behaviors and spatial distribution of the arc plasma were strongly related to the electrode configuration.A swirl flow of multi-arc plasma was formed by adjusting the electrode configuration, and a steady luminance area was clearly observed in the center of the discharge zone. Moreover, the size of the luminance area increased by decreasing the gas flow rate. The electrical connection in series could be formed between/among these arc columns with their respective driving power supplies in the multi-arc dynamic evolution process. An approximately periodical process of acceleration and deceleration of the arc rotation velocity was observed in the multi-arc generator with swirl flow configuration. In general, the mean velocity of arc rotation was higher in the multi-arc generator with swirl flow configuration when a pair of electrodes driven by a power supply were opposite to each other rather than adjacent.

关键词： characteristics multiple arc plasma multi-arc generator non-thermal arc

Decomposition mechanism of 1-naphthol by DC water plasmas at atmospheric pressure

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Decomposition mechanism of 1-naphthol by DC water plasmas at...

Experimental Study on Ammonia Co-Firing with Coal for Carbon Reduction in the Boiler of a 300-MW Coal-Fired Power Station

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作者：倪国华 lin qifu Guo Qijia 江贻满 Institute of Plasma Physics Chinese Academy of Science University of Science and Technology of China

This work investigated the decomposition mechanism of high concentration 1-naphthol solution in DC water plasmas at atmospheric *** experimental results showed that the concentration of 1-naphthol was reduced from 5 g/L down to 0.722 g/L at arc current of 8 A with the energy efficiency of 8.99×10-10 mol/*** decomposition efficiencies of 1-naphthol,chemical oxygen demand(COD) and total organic carbon(TOC) were increased with the increase in arc current(6 A-8 A) at same arc voltage,while the initial concentration of 1-naphthol had a negative correlation with *** gaseous products were determined using the combination of gas chromatograph equipped(GC) with a thermal conductivity detector(TCD).The major gaseous effluents were H2,CO,CH4 and CO2,which the content of syngas was over 50%.Furthermore,the CO selectivity had a negative correlation with arc *** intermediate products were identified by gas chromatography/mass spectroscopy(GC/MS) analysis *** was found that the gaseous intermediate byproducts of 1-naphthol solution were ethanol,tert-butanol,acetic acid,benzene,and so ***,acetic acid,acetaldehyde and oxalic acid were observed in the liquid effluents.A possible decomposition mechanism could be proposed.

关键词： Water plasma 1-naphthol Decomposition mechanism

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Engineering 2024年第9期40卷 247-259页

作者： qifu lin Wangping Sun Haiyan Li Yangjiong Liu Yuwei Chen Chengzhou Liu Yiman Jiang Yu Cheng Ning Ma Huaqing Ya Longwei Chen Shidong Fang Hansheng Feng Guang-Nan Luo Jiangang Li Kaixin Xiang Jie Cong Cheng Cheng Institute of Energy Hefei Comprehensive National Science Center(Anhui Energy Laboratory)Hefei 230088China Anbang Technology Co.Ltd Tongling 244000China Institute of Plasma Physics Hefei Institute of Matter ScienceChinese Academy of SciencesHefei 230031China

To reduce CO_(2) emissions from coal-fired power plants,the development of low-carbon or carbon-free fuel combustion technologies has become *** a new zero-carbon fuel,ammonia(NH_(3))can be used to address the storage and transportation issues of hydrogen *** it is not feasible to completely replace coal with ammonia in the short term,the development of ammonia-coal co-combustion technology at the current stage is a fast and feasible approach to reduce CO_(2) emissions from coal-fired power *** study focuses on modifying the boiler and installing two layers of eight pure-ammonia burners in a 300-MW coal-fired power plant to achieve ammonia-coal co-combustion at proportions ranging from 20%to 10%(by heat ratio)at loads of 180-to 300-MW,*** results show that,during ammonia-coal co-combustion in a 300-MW coal-fired power plant,there was a more significant change in NO_(x) emissions at the furnace outlet compared with that under pure-coal combustion as the boiler oxygen levels ***,ammonia burners located in the middle part of the main combustion zone exhibited a better high-temperature reduction performance than those located in the upper part of the main combustion *** all ammonia co-combustion conditions,the NH_(3) concentration at the furnace outlet remained below 1 parts per million(ppm).Compared with that under pure-coal conditions,the thermal efficiency of the boiler slightly decreased(by 0.12%-0.38%)under different loads when ammonia co-combustion reached 15 t·h^(-1).Ammonia co-combustion in coal-fired power plants is a potentially feasible technology route for carbon reduction.

关键词： Coal-fired boiler Coal mixing with ammonia Ammonia-coal co-firing Nitrogen oxide(NO_(x)) CO_(2)reduction Boiler thermal efficiency

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重视行政过程中协商的功能

探索与争鸣 2009年第3期 17-18页

作者：林奇富吉林大学行政学院博士

当前，基层政府部门在一些典犁群体性事件处理过程中普遍表现出“体制性迟钝”，笔者认为，这是由于政府在行政过程中缺乏灵活有效的协商机制来吸纳民意、拓宽民众的利益表达渠道，从而使初期的民意逐渐积压成民怨，甚至转化为民怒，使... 详细信息

当前，基层政府部门在一些典犁群体性事件处理过程中普遍表现出“体制性迟钝”，笔者认为，这是由于政府在行政过程中缺乏灵活有效的协商机制来吸纳民意、拓宽民众的利益表达渠道，从而使初期的民意逐渐积压成民怨，甚至转化为民怒，使事态逐渐失去控制并趋于严重。面对突如其来的大规模群体性行动，基层政府部门还是按照惯性行政思维，在行政过程中忽视与群众的协商与沟通，停留在强制命令、开会等候、请示报告甚至明哲保身、远离现场的境况之中，不深入群众以发现和解决问题，使政府在应对危机事件时明显处于体制性迟钝状态，错失解决问题的诸多良好时机。

关键词：行政过程协商机制政府部门利益表达渠道深入群众事件处理行政思维明哲保身

窄播时代的政治传播:中国传统媒体的挑战及其应对策略

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公共行政评论 2023年第5期16卷 141-157,M0006页

作者：殷昊林奇富吉林大学行政学院吉林大学行政学院暨吉林大学社会公正与政府治理研究中心

信息通信技术与新媒体的发展对中国传统媒体的政治传播造成了冲击。现有研究较少对传统媒体应对这一挑战的理论逻辑与政治意义做出统一的阐释。论文从传统媒体的政治传播职能及其现实困境出发,对上述议题进行了分析。本质上,互联网时代... 详细信息

信息通信技术与新媒体的发展对中国传统媒体的政治传播造成了冲击。现有研究较少对传统媒体应对这一挑战的理论逻辑与政治意义做出统一的阐释。论文从传统媒体的政治传播职能及其现实困境出发,对上述议题进行了分析。本质上,互联网时代中国传统媒体所面临的挑战是当前传播模式“窄播化”与传统媒体政治传播“大众化”要求之间的矛盾所造成的。研究发现,中国传统媒体采取加强其在互联网平台布局的“多平台策略”,以及同时扮演宣传媒体与商业化内容生产者的“双重身份策略”,以应对上述冲击与挑战。通过运用这两种策略,传统媒体扩展了其受众接触的广度,加大了其受众影响的深度,有效促进了政治传播的“再大众化”。两种策略的成功运用,有助于传统媒体适应新的媒介环境并有效履行其政治传播职能。此外,对传统媒体转型的政治逻辑与积极意义的分析,也有利于丰富和拓展中国政治传播实践的理论诠释。

关键词：中国传统媒体政治传播窄播再大众化应对策略

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论知识与政治权力的相关性

长白学刊 2006年第1期 22-26页

作者：林奇富吉林大学行政学院吉林长春130012

知识问题涉及的是知识的来源及其确证的问题,是一个认识论问题;政治权力之所以与知识紧密相关,其原因就在于政治权力具有与知识类似的某些特性;知识与政治权力之间的紧张与冲突关系不仅建立在一种可疑的知识论基础之上,而且还须以究竟... 详细信息

知识问题涉及的是知识的来源及其确证的问题,是一个认识论问题;政治权力之所以与知识紧密相关,其原因就在于政治权力具有与知识类似的某些特性;知识与政治权力之间的紧张与冲突关系不仅建立在一种可疑的知识论基础之上,而且还须以究竟何为权力以及权力如何介入我们对世界的理解等有争议的解释为前提;知识与政治权力的关系很早就被柏拉图等思想家们所关注,它涉及对政治权力的合法性及其政治控制的限度与范围等一系列重大的政治学主题;对知识与权力的研究将有力地促进新兴学科——知识政治学的发展。

关键词：知识知识论政治权力知识政治学

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反思互联网政治参与:代表性的视角

学术月刊 2020年第10期52卷 77-88页

作者：林奇富殷昊吉林大学行政学院/社会公正与政府治理研究中心吉林长春130012 吉林大学行政学院吉林长春130012

伴随着互联网信息技术的发展和普及,作为信息来源、沟通媒介和虚拟的公共空间,互联网为用户获取政治信息、培育政治观点并进行政治参与提供了极大便利。无论是网民线上讨论所产生的网络民意,还是网民通过线上手段与政府进行的互动,都对... 详细信息

伴随着互联网信息技术的发展和普及,作为信息来源、沟通媒介和虚拟的公共空间,互联网为用户获取政治信息、培育政治观点并进行政治参与提供了极大便利。无论是网民线上讨论所产生的网络民意,还是网民通过线上手段与政府进行的互动,都对政府的公共决策发挥着日趋重要的影响。从代表性的视角看,网民在多大程度上代表社会大众,将决定这一参与形式对公共决策的价值和意义。研究表明,当前中国网民无论在人口特征还是在政治态度上均无法较好地代表大众,且在重要政治态度上缺乏一致性。网民的这一代表性偏差可能削弱当下中国互联网政治参与对公共决策的积极作用。当前政府制定公共决策应从全局出发,审慎对待互联网政治参与,不可盲从网络民意。

关键词：互联网政治参与网络民意代表性公共决策