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航站楼建筑自备柴油发电机组设计分析

智能建筑电气技术 2024年第4期18卷 15-20,29页

作者：杨明轲北京市建筑设计研究院股份有限公司北京100045

本文依据若干航站楼的工程实践,通过对设计规范、保障容量、安装维护、运行控制等各方面的分析比较,对航站楼建筑自备柴油发电机组的设计应用进行了分析,以期在未来工程实践中得到更加可靠与合理的应用,也为同行在进行同类型设计时提供... 详细信息

本文依据若干航站楼的工程实践,通过对设计规范、保障容量、安装维护、运行控制等各方面的分析比较,对航站楼建筑自备柴油发电机组的设计应用进行了分析,以期在未来工程实践中得到更加可靠与合理的应用,也为同行在进行同类型设计时提供有益的参考。

关键词：柴油发电机组启动信号运行控制

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全馏分催化汽油抽提降苯工艺研究

石油化工 2024年第7期53卷 981-987页

作者：杨明科高思亮唐文成赵明田龙胜中石化石油化工科学研究院有限公司北京100083

针对国Ⅵ汽油标准下催化汽油存在的苯含量超标问题,通过液液抽提的方式,对全馏分催化汽油进行了降苯工艺研究。通过对12种溶剂进行筛选,确定了最优的抽提溶剂乙二醇(EG);考察了以EG为抽提溶剂条件下,萃取时间、温度、溶剂比对抽提效果... 详细信息

针对国Ⅵ汽油标准下催化汽油存在的苯含量超标问题,通过液液抽提的方式,对全馏分催化汽油进行了降苯工艺研究。通过对12种溶剂进行筛选,确定了最优的抽提溶剂乙二醇(EG);考察了以EG为抽提溶剂条件下,萃取时间、温度、溶剂比对抽提效果的影响;并进行了炼厂全馏分催化汽油的九级离心萃取实验。实验结果表明,EG具有优异的动力学性能,在5 min内即可与原料达到液液相平衡;提高溶剂比对萃取选择性影响不大,但会显著提高苯的脱除率;提高温度同样会提高苯的脱除率,但会降低萃取选择性;在优选实验条件下,苯含量最高可由原料的1.37%(w)降低至0.64%(w),脱除率达64%(φ),同时可保证其余芳烃收率在78%以上。

关键词：催化汽油降苯乙二醇液液萃取

A purely green approach to low-cost mass production of zeolitic imidazolate frameworks

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Green Energy & Environment 2023年第3期8卷 775-784页

作者： Hai Li Wan Chen Bei Liu mingke yang Zixuan Huang Changyu Sun Chun Deng Dapeng Cao Guangjin Chen State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China State Key Lab of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing100029China Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190China

Although zeolitic imidazolate frameworks(ZIFs)have bright prospects in wide fields like gas storage/separation,catalysis and medicine,etc.,their large-scale applications are bottlenecked by the absence of their low-cost commercial production ***,we report an uncon ventional method suitable for environmentally friendly and low-cost mass-production of *** this method,taking the synthesis of ZIF-8 as an example,ZnO was used instead of Zn(NO_(3))_(2) in traditional solvent synthesis methods and CO_(2) was introduced to dissolve ZnO in aqueous solution of 2-methylimidazole(HMeim)and form water soluble salt([ZnMeim]^(+)[MeimCOO]^(-))at room ***,by removing CO_(2) through heating or vacuuming,Meim-ions are produced and instantaneously assemble with[ZnMeim]^(+)s to generate ZIF-8 without any by *** to the absence of strong acid anions(such as NO^(-)_(3) and Cl^(-) et al.)in solution,the washing of filter cake required in the conventional approaches could be omitted and the filtrate containing only water and HMeim could be reused *** method is really green as no waste gas or liquid generates because CO_(2) and water could be recycled *** overcomes almost all bottlenecks occurred in commercial production of ZIF-8 when using traditional methods.A pilot plant was established for mass-production of ZIF-8 and hundreds kilograms of ZIF-8 was produced,which indicates that the new method is not only environmentally friendly but also low cost and commercial *** is expected that the new method would open an avenue for commercial applications of ZIFs.

关键词： Zeolitic imidazolate frameworks Mass production Metal oxide Carbon dioxide Environmentally friendly

A continuous and high-efficiency process to separate coal bed methane with porous ZIF-8 slurry:Experimental study and mathematical modelling

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Green Energy & Environment 2020年第3期5卷 347-363页

作者： Wan Chen Xiaonan Guo Enbao Zou Mengling Luo Mengzijing Chen mingke yang Hai Li Chongzhi Jia Chun Deng Changyu Sun Bei Liu Lanying yang Guangjin Chen State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China

Coal bed methane has been considered as an important energy *** major difficulty of purifying coal bed methane comes from the similar physical properties of CH_4 and N_*** ZIF-8/water-glycol slurry was used as a medium to separate coal bed methane by fluidifying the solid adsorbent *** sorption equilibrium experiment of binary mixture(CH_4/N_2)and slurry was *** selectivity of CH_4 to N_2 is within the range of 2-6,which proved the feasibility of the slurry separation *** modified Langmuir equation was used to describe the gas-slurry phase equilibrium behavior,and the calculated results were in good agreement with the experimental data.A continuous absorption-adsorption and desorption process on the separation of CH_4/N_2 in slurry is proposed and its mathematical model is also *** analysis is conducted to determine the operation conditions and the energy performance of the proposed process was also *** gas contains 30 mol%of methane and the methane concentration in product gas is 95.46 mol%with the methane recovery ratio of 90.74%.The total energy consumption for per unit volume of product gas is determined as 1.846 kWh Nm^(-3).Experimental results and process simulation provide basic data for the design and operation of pilot and industrial plant.

关键词： Coal bed methane Gas separation Phase equilibrium experiment Mathematical model Process simulation

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燃料油芳烃抽提的研究进展

武汉工程大学学报 2024年第5期46卷 482-489页

作者：陶土杨明科康顺吉沈陟马骏沈喜洲武汉工程大学邮电与信息工程学院湖北武汉430074 石油化工科学研究院北京100083 武汉工程大学化工与制药学院绿色化工过程教育部重点实验室(武汉工程大学)湖北武汉430205

燃料油芳烃抽提技术水平的提升是实现石化行业“减油增化,减油增特”战略目标的重要措施,萃取剂和芳烃抽提原料化学组成是决定芳烃抽提效果的关键因素。在萃取剂方面,阐述了单一溶剂、复合溶剂、离子液体以及低共熔剂等萃取剂在芳烃抽... 详细信息

燃料油芳烃抽提技术水平的提升是实现石化行业“减油增化,减油增特”战略目标的重要措施,萃取剂和芳烃抽提原料化学组成是决定芳烃抽提效果的关键因素。在萃取剂方面,阐述了单一溶剂、复合溶剂、离子液体以及低共熔剂等萃取剂在芳烃抽提领域的研究进展,相较于传统的芳烃抽提溶剂,高效复合溶剂的开发是提升抽提效率的有效措施;在抽提原料化学组成方面,总结了不同燃料油芳烃抽提研究进展,为扩宽芳烃抽提原料来源,实现石化行业战略目标提供理论基础。通过对这两方面研究成果的综合分析和讨论,对炼化行业芳烃抽提技术进行了展望。

关键词：芳烃抽提萃取剂燃料油

How Does Urban Shrinkage Affect Land Use Efficiency?A Case Study of Shrinking Cities in Northeast China

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Chinese Geographical Science 2024年第1期34卷 34-51页

作者： XIE mingke FENG Zhangxian SONG yang GUAN Haoming WANG Shijun School of Geographical Sciences Northeast Normal UniversityChangchun130024China

The effect of urban shrinkage has gradually become a new ***,urban shrinkage may exert great influence on land use efficiency(LUE)through various urban subsystems,but there is currently limited research examining these *** the Super-SBM-Undesirable model and the Structural Equation Model(SEM),this study calculates the LUE of shrinking cities in Northeast China and simulates the process of urban shrinkage affecting *** quantify the process of urban shrinkage affecting LUE,three mediation variables,namely the economy,public services,and innovation,are used as latent variables to apply *** results show that urban shrinkage will affect LUE through a direct path and indirect *** the direct path,urban shrinkage leads to an improvement in *** the indirect paths,the economy and innovation will transmit the negative effect of urban shrinkage on LUE,while public services will reverse this *** important contribution of this study is that it quantifies the paths of urban shrinkage affecting LUE,thereby expanding the understanding of urban shrinkage effect and laying a foundation for the sustainable development of shrinking cities.

关键词： urban shrinkage land use efficiency Super-SBM-Undesirable model Structural Equation Model(SEM) Northeast China

MEMS Huygens Clock Based on Synchronized Micromechanical Resonators

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Engineering 2024年第5期36卷 124-131页

作者： Xueyong Wei mingke Xu Qiqi yang Liu Xu a Yonghong Qi Ziming Ren Juan Ren Ronghua Huan Zhuangde Jiang State Key Laboratory for Manufacturing System Engineering Xi’an Jiaotong UniversityXi’an 710049China School of Construction Machinery Chang’an UniversityXi’an 710064China Department of Mechanics Zhejiang UniversityHangzhou 310027China

With the continuous miniaturization of electronic devices,microelectromechanical system(MEMS)oscillators that can be combined with integrated circuits have attracted increasing *** study reports a MEMS Huygens clock based on the synchronization principle,comprising two synchronized MEMS oscillators and a frequency compensation *** MEMS Huygens clock improved shorttime stability,improving the Allan deviation by a factor of 3.73 from 19.3 to 5.17 ppb at 1 s.A frequency compensation system based on the MEMS oscillator’s temperature-frequency characteristics was developed to compensate for the frequency shift of the MEMS Huygens clock by controlling the resonator *** effectively improved the long-term stability of the oscillator,with the Allan deviation improving by 1.6343105 times to 30.9 ppt at 6000 *** power consumption for compensating both oscillators simultaneously is only 2.85 mW·℃^(-1).Our comprehensive solution scheme provides a novel and precise engineering solution for achieving high-precision MEMS oscillators and extends synchronization applications in MEMS.

关键词： Frequency stability Huygens clock MEMS Oscillator Synchronization

贵州省建设用地利用情况起底大调查系统的建设与应用

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测绘与空间地理信息 2024年第7期47卷 105-107,114页

作者：杨铭珂张永富邓朋朋陈忠超李娟袁方芳张波贵州省第二测绘院贵州贵阳550004

为了全面摸清贵州全省建设用地利用情况,挖掘建设用地存量资源,助力盘活存量土地,本文充分发挥了群专结合、政府统筹的思想,基于信息化先进技术研发了贵州省建设用地利用情况起底大调查系统,高精度、多维度、广范围地完成建设用地调查任... 详细信息

为了全面摸清贵州全省建设用地利用情况,挖掘建设用地存量资源,助力盘活存量土地,本文充分发挥了群专结合、政府统筹的思想,基于信息化先进技术研发了贵州省建设用地利用情况起底大调查系统,高精度、多维度、广范围地完成建设用地调查任务,实现跨层级、跨系统的全省建设用地全生命周期监测监管的数字化、智能化、网联化,进一步推动了传统土地调查方式走向信息化支撑的精准便捷服务,为测绘地理信息技术主动支撑土地要素保障提供了可复制、可推广的“贵州经验”。

关键词：建设用地调查举证自然资源大数据业务协同

Flexural behavior of textile reinforced mortar-autoclaved lightweight aerated concrete composite panels

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Frontiers of Structural and Civil Engineering 2024年第5期18卷 776-787页

作者： Liying GUO mingke DENG Wei ZHANG Tong LI yangxi ZHANG Mengyu CAO Xian HU Department of Civil Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Key Lab of Structural Engineering and Earthquake Resistance Ministry of Education(XAUAT)Xi’an 710055China Scene engineering design institute Xi’an 710016China Dahua Group Shang hai 200062China

To improve the deficiencies of prefabricated autoclaved lightweight aerated concrete(ALC)panel such as susceptibility to cracking and low load-bearing capacity,a textile-reinforced mortar-autoclaved lightweight aerated concrete(TRM-ALC)composite panel was developed in this *** group of reference ALC panels and five groups of TRM-ALC panels were fabricated and subjected to four-point flexural *** was applied on the tensile side of the ALC panels to create *** variable parameters were the plies of textile(one or two),type of textile(basalt or carbon),and whether the matrix(without textile)was applied on the compression side of *** results showed that a bonding only 8-mm-thick TRM layer on the surface of the ALC panel could increase the cracking load by 180%−520%.The flexural capacity of the TRM-ALC panel increased as the number of textile layers *** reinforcement of the matrix on the compressive side could further enhance the stiffness and ultimate loadbearing capacity of the TRM-ALC *** panels with basalt textile failed in flexural mode,with the rupture of fabric *** with carbon textile failed in shear mode due to the ultra-high tensile strength of *** addition,analytical models related to the different failure modes were presented to estimate the ultimate load-carrying capacity of the TRM-ALC panels.

关键词： prefabricated autoclaved lightweight aerated concrete panel textile-reinforced mortar cracking load flexural capacity stiffness