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Investigation of oxy-fuel combustion for methane and acid gas in a diffusion flame

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Chinese Journal of Chemical Engineering 2024年第1期65卷 106-116页

作者： Songling Guo Xun Tao Fan Zhou Mengyan Yu yufan Wu Yunfei Gao Lu ding Fuchen Wang Institute of Clean Coal Technology East China University of Science and TechnologyShanghai 200237China

Co-combustion of methane(CH4)and acid gas(AG)is required to sustain the temperature in Claus reaction *** this study,oxy-fuel combustion of methane and acid gas has been experimentally studied in a diffusion *** equivalence ratios(ER=1.0,1.5,2.0)and CH_(4)-addition ratios(CH_(4)/AG=0.3,0.5,0.7)were examined and the flame was interpreted by analyzing the distributions of the temperature and species concentration along central ***_(4)-AG diffusion flame could be classified into three sections namely initial reaction,oxidation and complex reaction *** oxidation of CH_(4)and H_(2)S was noted in the first section wherein H_(2)S was preferred and both were mainly proceeding decomposition and partial ***_(2)was formed at oxidation section together with obvious presence of H2 and ***,H2 and CO were inclined to be sustained under fuel rich condition in the complex reaction *** ER and increasing CH4/AG contributed to higher temperature,H_(2)S and CH_(4)oxidation and CO_(2)*** a growing trend for CH_(4)and AG to convert into H_(2),CO and SO_(2)could be *** this factor enhanced the generation of CS2 and COS in the flame inner core by interactions of CH4 and CO_(2)with sulfur *** was formed through the interactions of CO and CO_(2)with sulfur *** CS_(2)production directly relied on reaction of CH_(4)with sulfur *** concentration of COS was greater than CS_(2)since CS_(2)was probably inhibited due to the presence of H_(2).COS and CS_(2)could be consumed by further oxidation or other complex reactions.

关键词： Acid gas Methane Oxy-fuel combustion Oxidation Chemical analysis Carbon sulfides

Application Research on Livable Communities Design in Singapore Neighborhood Center Pattern

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Application Research on Livable Communities Design in Singap...

作者： Yan Feng yufan ding Lei Lei Xiaoyu Ming Jia Liu Panpan Cao Xiaofang Yu College of Landscape Architecture Sichuan Agricultural University

Through the theoretical research on livable communities and the analysis of Singapore's neighborhood center, combined with the successful cases of community planning at home and abroad, this paper analyzes its reference to China's community planning, and focuses on introducing the neighborhood center model into livable community planning, summarizing the design principles and design strategies of livable community planning based on the neighborhood center model. Furthermore, the recommendations of the Singapore Neighborhood Center in the planning and design of livable communities in China are proposed, in order to provide theoretical reference for the planning and design of livable communities in the future.

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Exploration on the Rural Landscape Renewal of Leisure Agriculture

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Exploration on the Rural Landscape Renewal of Leisure Agricu...

作者： Jie Du Weiwei Qiu yufan ding Xiaoyu Ming Qingling He Yan Feng Xiaofang Yu College of Landscape Architecture Sichuan Agricultural University

Based on the dual background of leisure agriculture and rural landscape renewal, based on the current settlements and landscape recession faced by rural development, combined with the relevant theories of leisure agriculture planning, this paper considered the means and mode of rural landscape renewal. Through the analysis and summary of domestic and international practice cases, the suitability and operability of leisure agriculture in rural landscape renewal are explored, in order to provide reference and reference for rural landscape renewal in China.

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The Study of Productive Landscape in Wetland Park Design

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The Study of Productive Landscape in Wetland Park Design

作者： Yan Feng Xianzhu Zheng Xiaoyu Ming Panpan Cao Jie Du yufan ding Xiaofang Yu College of Landscape Architecture Sichuan Agricultural University

With the acceleration of the process of urban construction and development, the contradiction between man and nature has intensified, the ecological balance has been broken, and the ecological chain has been interrupted. In recent years, in order to improve the living environment, people have rationally utilized land resources and created a productive landscape. The productive landscape is back to the original, and savors the natural, and the wetland park is an organic combination of ecological wetland and urban park, with strong ecological functions. In order to exert greater ecological benefits for the city, the productive landscape will be introduced into the planning and design of the wetland park. This paper starts from the definition of the concept of productive landscape, and analyzes the domestic and international production landscape and the case of the wetland park. Thoughts on the design practice of wetland parks and theoretical references for the future planning and design of Wetland Parks.

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Analysis on the Space Design of Children's Outdoor Activities in Urban Residential Areas in China

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Analysis on the Space Design of Children's Outdoor Activitie...

作者： yufan ding Lei Lei Jie Du Qingling He Xiaoyu Ming Yan Feng Xiaofang Yu College of Landscape Architecture Sichuan Agricultural University

Based on the definition of children's outdoor activities in residential areas, the relationship between residential areas and children's outdoor activities and the significance of outdoor activities to children are summarized. Problem-oriented, it clarifies the deficiencies in children's outdoor activity space design at the present stage, and reconsiders their real needs for outdoor activity space from the perspective of children. This paper summarizes the relevant theoretical research on the outdoor activity space of children in residential areas at present, and analyzes the design methods from the perspectives of site design, green design, recreation and architectural sketch design, in order to provide useful enlightenment and guidance for relevant theoretical research and design practice.

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农光互补电站的生态产品价值核算——以正泰江山200 MW农光互补电站为例

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农业资源与环境学报 2024年第1期41卷 197-211页

作者：魏宇帆金建峰丁倩周金莺张芳明杨武浙江大学环境与资源学院杭州310058 国网浙江省电力有限公司湖州供电公司浙江安吉313000 浙江九亩智慧农业科技有限公司杭州310000

为定量评估农光互补电站的生态效益,本研究基于生态产品价值核算的功能价值法,以华东地区最大的农光互补电站——正泰江山200 MW农光互补电站作为案例区开展了农光互补电站生态产品价值的核算。研究基于农光互补电站的特点对生态产品指... 详细信息

为定量评估农光互补电站的生态效益,本研究基于生态产品价值核算的功能价值法,以华东地区最大的农光互补电站——正泰江山200 MW农光互补电站作为案例区开展了农光互补电站生态产品价值的核算。研究基于农光互补电站的特点对生态产品指标进行了筛选,选取了农业产品、水源涵养、土壤保持、固碳、释氧和空气净化6个核算指标,同时结合遥感和地理信息数据、实地采样数据以及农业种植数据,量化了农光互补电站的生态效益。根据光伏板下种植类型的差异,将案例区划分为山茶区、蔬菜区、中药区、养殖区和猕猴桃区5个区域。核算结果表明:2021年该电站的生态产品价值量为1605.64万元,其中,供给产品为169.37万元,占10.55%,调节服务为1436.27万元,占89.45%;从不同分区来看,山茶区的生态产品价值最高,其次是猕猴桃区、蔬菜区和养殖区,中药区最低;从单位面积生态产品价值来看,2021年案例区的单位面积生态产品价值为3.79元·m^(-2)。农光互补电站的生态产品价值核算定量地展示了农光互补模式良好的生态效益,填补了定量评估农光互补电站生态效益的研究空白,对进一步提升农光互补电站的综合效益提供了技术支撑,同时为光伏资源和生态产品价值协同实现提供了新思路。

关键词：生态产品价值实现生态系统服务农业光伏可再生能源碳达峰碳中和

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基于变刚度悬臂梁的MEMS静电驱动器的动态响应优化

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半导体光电 2024年第2期45卷 188-194页

作者：高宇帆戴旭涵王怀治张卓尔丁桂甫上海交通大学微米/纳米加工技术国家级重点实验室上海200240

传统的微机电系统(MEMS)静电驱动器存在驱动电压高和超调振荡的问题,可动极板稳定在平衡位置前会发生持续的振荡,难以满足可变电容、光开关等应用领域的综合要求。针对上述问题,采用变刚度悬臂梁的设计,利用刚度随行程增大的特性抑制了... 详细信息

传统的微机电系统(MEMS)静电驱动器存在驱动电压高和超调振荡的问题,可动极板稳定在平衡位置前会发生持续的振荡,难以满足可变电容、光开关等应用领域的综合要求。针对上述问题,采用变刚度悬臂梁的设计,利用刚度随行程增大的特性抑制了极板吸合及释放过程的振荡现象,在缩短调节时间的同时,有效降低了器件的驱动电压。仿真和实验结果表明,当器件悬臂梁的刚度随位移由5N/m增大到35N/m时,在相同电压下,动态响应的调节时间减少了55.5%,在相同行程下,动态响应的调节时间减少了21%,对应的驱动电压减少了23%。

关键词：微机电系统静电驱动器变刚度动态响应

外卖垃圾分类回收处理现状及优化方案的分析与研究

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山东英才学院学报 2018年第4期 65-69页

作者：李倚烽丁宇帆赵炳瑄刘问远王帅(指导) 山东省实验中学山东济南250104 山东青年政治学院信息工程学院

改革开放迎春风,中国经济获得了质的飞跃。在经济发展中,旅游业成为了国民经济发展最快和最具有国际竞争优势的产业之一。然而,'道路拥堵寸步难行、住房难、吃饭贵'逐渐成为了旅游行业中的'老大难'问题。本文通过对旅游业现状以及目前... 详细信息

改革开放迎春风,中国经济获得了质的飞跃。在经济发展中,旅游业成为了国民经济发展最快和最具有国际竞争优势的产业之一。然而,'道路拥堵寸步难行、住房难、吃饭贵'逐渐成为了旅游行业中的'老大难'问题。本文通过对旅游业现状以及目前存在问题的了解与分析,提供了相应的解决办法,并提出了共享与旅游业相结合的新模式。

关键词：外卖垃圾分类固体废弃物优化处理

中国社区老年居民衰弱发生率与影响因素的Meta分析

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医学新知 2024年第3期34卷 301-311页

作者：侯莎洁丁尧郭小兰李雨繁陕西中医药大学护理学院陕西咸阳712046

目的系统评价中国社区老年居民衰弱的发生率及其影响因素。方法计算机检索中国知网、维普、万方、中国生物医学文献数据库、PubMed、Embase、Web of Science、Cochrane Library相关文献,检索时限为建库至2023年2月,采用Stata 12.0和RevM... 详细信息

目的系统评价中国社区老年居民衰弱的发生率及其影响因素。方法计算机检索中国知网、维普、万方、中国生物医学文献数据库、PubMed、Embase、Web of Science、Cochrane Library相关文献,检索时限为建库至2023年2月,采用Stata 12.0和RevMan 5.3软件对中国社区老年居民衰弱的发生率及影响因素进行Meta分析。结果共纳入17篇文献,合计11928例老年人。Meta分析结果显示,中国社区居民衰弱发生率为16%[95%CI(12%,20%)]。其危险因素包括营养不良[OR=6.68,95%CI(3.35,13.32)]、合并慢性病[OR=6.22,95%CI(5.24,7.38)]、多重用药[OR=2.71,95%CI(2.03,3.63)]、睡眠质量差[OR=2.54,95%CI(1.66,3.89)]、抑郁情绪[OR=3.42,95%CI(1.78,6.58)]、使用步行辅助工具[OR=5.42,95%CI(1.98,14.86)]、日常生活活动能力受损[OR=8.07,95%CI(5.21,15.21)]、年龄≥80岁[OR=2.68,95%CI(1.95,3.69)];小学以上文化程度[OR=0.53,95%CI(0.42,0.66)]是其保护性因素。结论中国社区老年居民衰弱发生率高,危险因素较多。应对社区老年人进行早期衰弱筛查并开展针对性的干预,预防老年人衰弱的发生,促进健康老龄化。

关键词：衰弱社区老年居民发生率影响因素 Meta分析