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分子尺度反应器动力学模型构建及在乙烯装置中的应用

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石油化工自动化 2024年第2期60卷 12-19+34页

作者：蔡荣生张卡中科(广东)炼化有限公司石化盈科信息技术有限责任公司

简述了乙烯裂解炉模型建立的各种方法，并阐述了各种建模方法的优缺点，最终指出了乙烯裂解炉反应模型构建的研发方向。对乙烯裂解原料和产品进行精细的分子表征，构建乙烯裂解炉分子反应动力学模型，通过基于分子尺度反应动力学模型的... 详细信息

简述了乙烯裂解炉模型建立的各种方法，并阐述了各种建模方法的优缺点，最终指出了乙烯裂解炉反应模型构建的研发方向。对乙烯裂解原料和产品进行精细的分子表征，构建乙烯裂解炉分子反应动力学模型，通过基于分子尺度反应动力学模型的乙烯裂解装置实时优化和仪表故障监测，实现优化控制过程自主执行，及时消除故障，最终实现基于分子模型的乙烯装置实时优化应用。通过模型应用表明：对乙烯装置全流程的实时优化和控制，实现了乙烯装置高附加值产品收率的提高和能源的有效利用，同时，可通过模型对故障仪表进行监测。

关键词：分子模拟乙烯裂解实时优化动力学模型

来源：博看期刊

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堆石坝压实密度快速检测方法的研究

山西建筑 2024年第5期50卷 188-191页

作者：蔡荣生董东雪王利楠中国水利水电第六工程局有限公司山东临朐262600

提出了基于三维激光扫描、图像智能识别与小粒径骨料自动筛分机的堆石坝密度快速检测方法,旨在提高堆石坝检测精度和效率,保障水利工程安全。通过三维激光扫描获取堆石坝测坑表面的三维点云数据,实现测坑体积的快速计算;结合图像智能识... 详细信息

提出了基于三维激光扫描、图像智能识别与小粒径骨料自动筛分机的堆石坝密度快速检测方法,旨在提高堆石坝检测精度和效率,保障水利工程安全。通过三维激光扫描获取堆石坝测坑表面的三维点云数据,实现测坑体积的快速计算;结合图像智能识别技术,实现对骨料粒径的自动测量;利用小粒径骨料自动筛分机对堆石坝中的骨料进行筛分和测量,定量评价压实状态。该方法具有快速、准确等优点,适用于大规模的堆石坝密度检测,达到了推动碾压施工自动化水平的效果。

关键词：堆石坝快速检测激光点云扫描粒径智能识别骨料自动筛分机

High-performance polymer electrolyte membranes incorporated with 2D silica nanosheets in high-temperature proton exchange membrane fuel cells

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Journal of Energy Chemistry 2022年第1期31卷 323-334,I0009页

作者： Zunmin Guo Jianuo Chen Jae Jong Byun rongsheng cai Maria Perez-Page Madhumita Sahoo Zhaoqi Ji Sarah J.Haigh Stuart M.Holmes Department of Chemical Engineering and Analytical Science The University of ManchesterM139PLUnited Kingdom Department of Materials The University of ManchesterM139PLUnited Kingdom

Silica nanosheets(SN)derived from natural vermiculite(Verm)were successfully incorporated into polyethersulfone-polyvinylpyrrolidone(PES-PVP)polymer to fabricate high-temperature proton exchange membranes(HT-PEMs).The content of SN filler was varied(0.1-0.75 wt%)to study its influence on proton conductivity,power density and *** from the hydroxyl groups of SN that enable the formation of additional proton-transferring pathways,the inorganic-organic membrane displayed enhanced proton conductivity of 48.2 mS/cm and power density of 495 mW/cm^(2) at 150℃ without humidification when the content of SN is 0.25 wt%.Furthermore,exfoliated SN(E-SN)and sulfonated SN(S-SN),which were fabricated by a liquid-phase exfoliation method and silane condensation,respectively,were embedded in PES-PVP polymer matrix by a simple blending *** to the significant contribution from sulfonic groups in S-SN,the membrane with 0.25 wt%S-SN reached the highest proton conductivity of51.5 mS/cm and peak power density of 546 mW/cm^(2) at150℃,48%higher than the pristine PES-PVP *** to unaltered PES-PVP membrane,SN added hybrid composite membrane demonstrated excellent durability for the fuel cell at 150℃.Using a facile method to prepare 2D SN from natural clay minerals,the strategy of exfoliation and functionalization of SN can be potentially used in the production of HT-PEMs.

关键词： Silica nanosheets Vermiculite High-temperature proton exchange membrane Proton conductivity

Doped graphene/carbon black hybrid catalyst giving enhanced oxygen reduction reaction activity with high resistance to corrosion in proton exchange membrane fuel cells

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Journal of Energy Chemistry 2022年第5期31卷 143-153页

作者： Zhaoqi Ji Jianuo Chen María Pérez-Page Zunmin Guo Ziyu Zhao rongsheng cai Maxwell T.P.Rigby Sarah J.Haigh Stuart M.Holmes School of Automotive Engineering Harbin Institute of TechnologyWeihai264209ShandongChina Department of Chemical Engineering and Analytical Science The University of ManchesterManchester M139PLUK Department of Materials The University of ManchesterManchester M139PLUK

Nitrogen doping of the carbon is an important method to improve the performance and durability of catalysts for proton exchange membrane fuel cells by platinum–nitrogen and carbon–nitrogen bonds. This study shows that p-phenyl groups and graphitic N acting bridges linking platinum and the graphene/carbon black(the ratio graphene/carbon black = 2/3) hybrid support materials achieved the average size of platinum nanoparticles with(4.88 ± 1.79) nm. It improved the performance of the lower-temperature hydrogen fuel cell up to 0.934 W cm^(-2) at 0.60 V, which is 1.55 times greater than that of commercial Pt/C. Doping also enhanced the interaction between Pt and the support materials, and the resistance to corrosion, thus improving the durability of the low-temperature hydrogen fuel cell with a much lower decay of 10 mV at 0.80 A cm^(-2) after 30 k cycles of an in-situ accelerated stress test of catalyst degradation than that of 92 mV in Pt/C, which achieves the target of Department of Energy(<30 mV). Meanwhile,Pt/Nr EGO_(2)-CB_(3) remains 78% of initial power density at 1.5 A cm^(-2) after 5 k cycles of in-situ accelerated stress test of carbon corrosion, which is more stable than the power density of commercial Pt/C, keeping only 54% after accelerated stress test.

关键词： Nitrogen doped graphene Low-temperature hydrogen fuel cell Catalyst degradation Carbon corrosion

Graphene/carbon structured catalyst layer to enhance the performance and durability of the high-temperature proton exchange membrane fuel cells

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Journal of Energy Chemistry 2022年第12期75卷 399-407,I0011页

作者： Zhaoqi Ji Jianuo Chen Zunmin Guo Ziyu Zhao rongsheng cai Maxwell T.P.Rigby Sarah J.Haigh Maria Perez-Page Yitao Shen Stuart M.Holmes School of Automotive Engineering Harbin Institute of Technology(Weihai)Weihai 264209ShandongChina Department of Chemical Engineering The University of ManchesterManchester M139PLUK Department of Materials The University of ManchesterManchester M139PLUK

In this study,nitrogen doped electrochemically exfoliated reduced graphene oxide and carbon black supported platinum(Pt/Nr EGO_(2)-CB_(3))has been prepared to enhance the performance and durability of hightemperature PEMFCs with lower Pt *** the one hand,Pt/Nr EGO_(2)-CB_(3)with the strong interaction between the Pt and nitrogen(N)prevent agglomeration of Pt particles and Pt particles is 5.46±1.46 nm,which is smaller than that of 6.78±1.34 nm in Pt/***,ECSA of Pt/Nr EGO_(2)-CB_(3)decrease 13.65%after AST,which is much lower than that of 97.99%in Pt/*** the other hand,the Nr EGO flakes in MEAac act as a barrier to mitigate phosphoric acid redistribution,which improves the formation of triple-phase boundaries(TPBs)and gives stable operation of the MEAacwith a lower decay rate of 0.02 mV h^(-1)within100 *** steady-state operation,the maximum power density of Pt/Nr EGO_(2)-CB_(3)(0.411 W cm^(-2))is three times higher than that of conventional Pt/C(0.134 W cm^(-2))in high-temperature *** AST,the mass transfer resistance of Pt/Nr EGO_(2)-CB_(3)electrode(0.560Ωcm^(2))is lower than that in Pt/C(0.728Ωcm^(2)).

关键词： High-temperature proton exchange membrane fuel cell Phosphoric acid loss Pt catalyst degradation Accelerated stress test Durability

浅谈图书馆数字资源建设中视频与音频信息的采集

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图书馆工作与研究 2010年第5期 41-43页

作者：蔡荣生江西省图书馆

本文从模拟信号的数字化、音视频采编的相关标准、视音频信息采集中的文件格式、视音频节目的编辑整理及非线性编辑系统等方面,探讨了数字资源建设中视频与音频信息采集的有关问题。

关键词：数字资源信息采集视频音频

浅谈文化产业的发展特征——“韩流”的经济学启示

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北京工商大学学报（社会科学版） 2006年第6期21卷 87-90,95页

作者：赵锦兰蔡荣生蔡奕勇中国人民大学商学院北京100872 韩国高丽大学国际大学院

近几年韩国文化产业的成功发展,不仅为本国企业带来了前所未有的成本优势与持续增长的利润空间,同时也使高丽文化在亚洲产生了巨大的社会效应。文化产业作为我国的一种新型业态,其发展受“韩流”经济学的启示为:企业管理者应该根据中国... 详细信息

近几年韩国文化产业的成功发展,不仅为本国企业带来了前所未有的成本优势与持续增长的利润空间,同时也使高丽文化在亚洲产生了巨大的社会效应。文化产业作为我国的一种新型业态,其发展受“韩流”经济学的启示为:企业管理者应该根据中国文化产业的特点以及文化产品的特殊性,通过改革与创新,促进我国文化产业链与产业集群的协调发展,以实现文化产业与其他相关产业的规模、效益、资源、环境的可持续发展。

关键词： “韩流” 文化产业虚拟产品自然垄断

我国大中城市经济适用房有效供求均衡度研究——基于“非均衡计量模型”的实证分析

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财贸经济 2010年第7期31卷 116-121页

作者：蔡荣生吴崇宇中国人民大学商学院

本文以我国大中城市经济适用房的有效供求为研究对象,通过构建非均衡计量模型,采用我国33个有代表性的大中城市2000—2007年相关统计数据进行实证分析,揭示了近年来我国大中城市经济适用房有效供求的真实情况。研究发现,房地产市场2004... 详细信息

本文以我国大中城市经济适用房的有效供求为研究对象,通过构建非均衡计量模型,采用我国33个有代表性的大中城市2000—2007年相关统计数据进行实证分析,揭示了近年来我国大中城市经济适用房有效供求的真实情况。研究发现,房地产市场2004年以来出现的新一轮房价飙升,使得我国经济适用房市场出现了明显的供求失衡现象。为了扭转上述现象,本文给出了一些政策建议,包括增加经济适用房的供给、对经济适用房进行合理规划等。

关键词：经济适用房非均衡计量模型房价收入比

Shor's algorithm does not factor large integers in the presence of noise

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Science China(Information Sciences) 2024年第7期67卷 305-320页

作者： Jin-Yi cai College of Letters and Science University of Wisconsin

We consider Shor's quantum factoring algorithm in the setting of noisy quantum gates. Under a generic model of random noise for(controlled) rotation gates, we prove that the algorithm does not factor integers of the form pq when the noise exceeds a vanishingly small level in terms of n—the number of bits of the integer to be factored, where p and q are from a well-defined set of primes of positive density. We further prove that with probability 1-o(1) over random prime pairs(p, q), Shor's factoring algorithm does not factor numbers of the form pq, with the same level of random noise present.

关键词： random noise Shor's algorithm rotation gates quantum computing prime factorization