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Modeling and Optimization of a Fractionation,Absorption,and Stabilization System in an Industrial Fluid Catalytic Cracking Process

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China Petroleum Processing & Petrochemical Technology 2022年第3期24卷 117-127页

作者： Long Jian jiang siyi Wang Wei Zhang Feng Han Jifei Fan Chen Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of EducationEast China University of Science and TechnologyShanghai 200237China SINOPEC Jiujiang Company Jiujiang 332013China SINOPEC Research Institute of Petroleum Processing Beijing 100083China

Fluid catalytic cracking(FCC)is a vitally important refinery *** fractionation,absorption,and stabilization system in the FCC process is a significant way to obtain key products,and its parameters will directly affect the quality of the *** this work,using industrial data from an actual FCC process,a model of the FCC fractionation,absorption,and stabilization system was developed using process simulation *** sequence quadratic program algorithm was then used to identify the parameters of each tower,increasing the accuracy of the simulation ***,using this improved model,a sensitivity analysis was performed to examine the effects of different operating *** pattern-search method was then used to optimize the operating parameters of the *** results showed that the optimized model has good prediction accuracy,and using the model,it was found that changing the operation parameters could result in a 1.84%improvement in economic *** such,the developed model was demonstrated to be usefully applicable to the optimization of the process operation of an FCC fractionation,absorption,and stabilization system.

关键词： fluid catalytic cracking sequence quadratic program process modeling parameters identification patternsearch method

Early application of percutaneous neuromuscular electric stimulation in interfering motor function of limbs and difference in temperature of axilla of patients with ischemic stroke

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Neural Regeneration Research 2006年第2期1卷 188-189页

作者： Zhenhui jiang siyi Yin Na Bi Xiang He Fang Qu Department of Neurology General Hospital of Shenyang Military Area Command of Chinese PEA Shenyang 110016Liaoning Province. China

BACKGROUND： Temperature of axilla could be affected due to motor dysfunction of limbs and neural changes of vessel after ischemic stroke. OBJECTIVE： To observe the effect of percutaneous neuromuscular electric stimulation （PNES） on difference in temperature of axilla and analyze the relationship between function of limbs and difference in temperature of axilla. DESIGN： Randomized grouping and controlled observation SETTING： Department of Neurology, General Hospital of Shenyang Military Area Command of Chinese PLA PARTICIPANTS： Sixty patients with ischemic stroke were selected from Neurological Department of General Hospital of Shenyang Military Area Command of Chinese PLA from January to June 2003. All cases were diagnosed with clinical diagnosis criteria of ischemic stroke established by the Fourth Chinese Classification of Cerebrovasular Disease and CT examination and received neuromuscular electric stimulation （NES）. Patients were randomly divided into control group and treatment group with 30 in each group. METHODS： Control group： Patients received routinely neurological therapy. Treatment group： Except routine therapy, patients suffered from NES at 48 hours after hospitalization. NMT-91 NES equipment was used to stimulated injured limbs with low frequency once 30 minutes a day in total of 10 times a course, especially extensor muscle of upper limb and flexor muscle of lower limb. Prescription of hemiplegia was internally decided by equipment with the output frequency of 200 Hz. Intensity of electric output could cause muscle contraction. The therapy needed two or three courses. Temperature of bilateral axilla was measured every day to calculate the difference with the formula of （temperature of axilla on the injured side - temperature of axilla on the healthy side）. Motor function of limbs was measured with FugI-Meyer Motor Assessment （FMA） during hospitalization and at 2 and 4 hours after hospitalization. Among 90 points, upper and lower limb functio

关键词： lim Early application of percutaneous neuromuscular electric stimulation in interfering motor function of limbs and difference in temperature of axilla of patients with ischemic stroke

时代潮流中的选择——喜（富）连成社科班育人、管理理念往现代化方向的演进

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戏剧（中央戏剧学院学报） 2019年第3期 145-157页

作者：姜斯轶北京外国语大学艺术研究院

喜(富)连成社长期被视为全面实行“前现代”戏曲教育理念和模式的代表,而事实上,在其长达44年的办学历程中,其育人和管理理念在时代发展中,也进行着自我调适与健全。如果以一种历史的眼光对其进行全面深入的剖析,会发现其追随时代大潮,... 详细信息

喜(富)连成社长期被视为全面实行“前现代”戏曲教育理念和模式的代表,而事实上,在其长达44年的办学历程中,其育人和管理理念在时代发展中,也进行着自我调适与健全。如果以一种历史的眼光对其进行全面深入的剖析,会发现其追随时代大潮,向现代教育方向迈进做出的努力。本文立足相关史料,试图探究喜(富)连成社科班进行教育和管理全面改革的内外两方面因素,并讨论20世纪30年代不同戏曲教育机构面临的相同改革困境,同时分析喜(富)连成社科班改革带来的深远影响。

关键词：喜连成班富连成社科班戏曲教育

Synthesis,biological evaluation and docking studies of diaryl-1,2,4-triazoles bearing hydroxamic acid and N-hydroxyurea moiety as dual inhibitors of cyclooxygenase-2 and 5-lipoxygenase

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Synthesis,biological evaluation and docking studies of diary...

2012长三角药物化学研讨会

作者： Xiaojing Huang Bo jiang Hequan Yao Xiaoming Wu siyi jiang Qiujuan Wang Jun Liu Jinyi Xu Department of Medicinal Chemistry College of PharmacyChina Pharmaceutical University State Key Laboratory of Natural Medicines China Pharmaceutical University

Both traditional non-steroidal anti-inflammatory drugs and selective COX-2 inhibitors(coxibs) usually exert some unwanted therapeutic effects even severe toxicity in treating inflammations.5-LOX is a key enzyme responsible for the conversion of AA into LTs and may play a role in cardiovascular *** has also been well established that inhibition of the COX enzymes may shunt AA metabolism to the 5-LOX pathway,but when both COX-2 and 5-LOX were blocked the production of inflammatory mediators could be completely shut ***,dual inhibition of COX-2 and 5-LOX constitutes a rational

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全站仪三角高程测量的新方法

中国矿业 2006年第11期15卷 71-72页

作者：江思义裴德西广西建设职业技术学院南宁530003 北海市国土资源局北海536000

全站仪三角高程测量的新方法,既不用量仪器高又不用量棱镜高,既不用对中又可以减免两差影响,既提高了测量速度,又提高了测量精度。

关键词：全站仪三角高程测量新方法

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短边GPS平面控制网的静态测量误差与对策

建井技术 2008年第1期29卷 21-23,20页

作者：江思义广西建设职业技术学院广西南宁530003

对短边GPS平面控制网的静态测量误差进行了分析,提出了消除或削弱误差的对策。指出了作业中一要选择质量较好的GPS接收机,并认真对中整平;二要避开较强的反射面,并适当延长观测时间;三要选用较好的数据处理软件,并利用观测值求差。这样... 详细信息

对短边GPS平面控制网的静态测量误差进行了分析,提出了消除或削弱误差的对策。指出了作业中一要选择质量较好的GPS接收机,并认真对中整平;二要避开较强的反射面,并适当延长观测时间;三要选用较好的数据处理软件,并利用观测值求差。这样可以大大减少多路径效应、观测误差、周跳、天线相位中心位置偏差的影响,从而提高短边GPS静态测量的精度。

关键词：短边GPS平面控制网静态测量误差对策

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基于欠采样的载频与二维到达角联合估计方法

电子测量与仪器学报 2020年第4期32卷 142-149页

作者：张钧姜思仪彭喜元北京遥感设备研究所北京100854 哈尔滨工业大学电子与信息工程学院哈尔滨150001

针对阵列参数估计中传统奈奎斯特采样定理给采样和存储设备带来的巨大压力,提出了一种基于随机解调(RD)阵列结构的信号载频与二维到达角(2D-DOA)联合估计方法。利用不同天线阵列之间的互相关矩阵构造协方差矩阵,基于旋转不变子空间(ESPR... 详细信息

针对阵列参数估计中传统奈奎斯特采样定理给采样和存储设备带来的巨大压力,提出了一种基于随机解调(RD)阵列结构的信号载频与二维到达角(2D-DOA)联合估计方法。利用不同天线阵列之间的互相关矩阵构造协方差矩阵,基于旋转不变子空间(ESPRIT)方法求解载频和2D-DOA参数,同时克服了载频和2D-DOA之间的配对问题。仿真实验结果证明了该方法能较好地从较少的欠奈奎斯特样本中估计目标信号的载波频率和2D-DOA,并恢复原信号的时域波形。

关键词： 2D-DOA 联合估计双L型阵列随机解调压缩感知

Pr/Nb共掺Bi_4Ti_3O_(12)铋层状陶瓷的光致发光与电性能研究

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中国科学：技术科学 2017年第7期47卷 718-726页

作者：陈超江亚林涂娜陈云婧邹思怿江向平景德镇陶瓷大学材料科学与工程学院江西省先进陶瓷材料重点实验室景德镇333001

Bi_4Ti_3O_(12)是一种兼具有高居里温度和高电阻率的铋层状结构压电材料.本文利用Pr^(3+),Nb^(5+)分别对其A位Bi^(3+)和B位Ti^(4+)进行掺杂改性,采用传统固相法制备了Bi_(4-x)Pr_xTi_(2.92)Nb_(0.08)O_(12)(BITN-xPr,0≤x≤0.1)陶瓷,通过控制Nb^(5+)离子的量不变,调节Pr^(3+)离子的浓度来研究不同稀土离子掺杂量对Bi_4Ti_3O_(12)陶瓷的结构形貌、光致发光、介电以及铁电压电性能的影响.经X射线衍射(XRD)测试表明所有样品都具有单一正交相结构,且扫描电子显微镜(SEM)显示陶瓷具有层状形貌特征,拉曼光谱表明Pr^(3+)离子取代钙钛矿层的A位Bi^(3+)离子,导致TiO6八面体发生扭曲.通过蓝光和紫外激光对Bi_(4-x)Pr_xTi_(2.92)Nb_(0.08)O_(12)陶瓷进行激发,可获得红色发光,使其有望作为红色荧光粉应用于蓝色基的白光LED照明.随着Pr浓度的增加,红色发光强度呈现出先增强后减弱的规律,居里温度表现出小幅度下降;另外,陶瓷的压电铁电性能均得到一定程度的改善,以上结果表明Bi_(4-x)Pr_xTi_(2.92)Nb_(0.08)O_(12)陶瓷是一种兼具铁电压电以及光致发光性能的多功能材料.

关键词：铋层状结构拉曼光致发光介电性压电性

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异丁酸热解实验和动力学模型研究

高校化学工程学报 2023年第3期37卷 392-400页

作者：蒋思依刘严成有为王丽军李希浙江大学生物质化工教育部重点实验室浙江大学化学工程与生物工程学院浙江杭州310058 浙江大学衢州研究院浙江衢州324000 浙江恒逸石化研究院有限公司浙江杭州311200

为了构建准确可靠的异丁酸热解反应动力学模型,采用流动反应器研究了异丁酸气相热解反应过程,考察了异丁酸分压为10~20 kPa、反应温度为848~908 K、停留时间为2~3.5 s条件下热解产物的变化规律;采用理论计算方法研究了异丁酸单分子热解... 详细信息

为了构建准确可靠的异丁酸热解反应动力学模型,采用流动反应器研究了异丁酸气相热解反应过程,考察了异丁酸分压为10~20 kPa、反应温度为848~908 K、停留时间为2~3.5 s条件下热解产物的变化规律;采用理论计算方法研究了异丁酸单分子热解、异构化、氢提取、β-裂解、中间体二甲基乙烯酮热解等反应路径,开发了1个包含271种组分、3122步反应的详细动力学模型。结果表明,该模型能很好地预测热解产物的变化规律。通过生成速率和敏感性分析,得到了异丁酸热解过程,强调了氢提取反应的重要作用,α-H的提取反应是异丁酸的主要消耗路径。

关键词：异丁酸热解流动反应器动力学模型模拟