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ELM-based Real-time Prediction for Hydrogenolysis Degree of Hydrofining Reaction in Hydrocracking Process 36

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ELM-based Real-time Prediction for Hydrogenolysis Degree of ...

第36届中国控制会议

作者： Guanyu Chen Yalin Wang yongfei xue Xiaofeng Yuan Shengwu Zou School of Information Science and Engineering Central South University SINOPEC Jiujiang Company

ISBN: (纸本)9781538629185

Hydrogenolysis degree of hydrofinmg reaction in hydrocracking process is an important index which can reflect the running status of hydrocracking,but it’s difficult to be detected *** this paper,hydrogenolysis degree is redefined with some relevant information which is easier to be detected online,such as hydrogen sulfide and ammonia,and then an ELM-based online prediction method is proposed to forecast the *** that multiple working conditions exist in the long hydrocracking process,steady-state data is selected by double variances method,and a number of data sets are *** data sets include the information of catalyst activity,feed properties,operating parameters and the hydrogenolysis degree calculated using hydrogen sulfide and ammonia content by a given *** specific catalyst activity and feed properties,the relationship between operating parameters and hydrogenolysis degree is established by ELM algorithm,so as to predict the hydrogenolysis degree of hydrofinmg process in real *** simulation results demonstrate that the ELM-based real-time prediction method can effectively predict the hydrogenolysis degree of compounds containing S/N in hydrofinmg process,which is benefit to protect the activity of catalyst and ensure the quality of final products.

关键词： real-time prediction hydrofining hydrogenolysis degree ELM

Mesoporous TiO2 nanoparticles terminated with carbonate-like groups:visible-light photocatalytic activity

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Mesoporous TiO2 nanoparticles terminated with carbonate-like...

河南省化学会2016年学术年会

作者： Bingkun Liu yongfei xue School of Material and Chemical Engineering Zhengzhou University of Light Industry

Mesoporous carbonate-doped TiO microspheres were synthesized by a simple "one-pot"solvothermal method. The diameter of the TiO microsphere could be varied from 0.2 μm to 1.5 μm by adjusting the amount of the initial titanium isopropoxide and it has high specific surface areas. A controllable amount of carbonate could be incorporated into TiO through low-temperature post-synthesis annealing, which extends the light absorption of the TiO microspheres from the ultraviolet to the visible region of the solar spectrum. Very high photocatalytic activity of these carbonate-doped TiO microspheres was demonstrated in the visible light region for degradation of methyl orange. Under 3 Sun visible-light illumination(λ≥400 nm), the as-prepared carbonate-doped TiO microspheres can degrade more than 90% methyl orange in 90 min, which is significantly higher than those from various other TiO photocatalysts.

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基于核T-PLS的化工过程故障检测算法

化工学报 2013年第12期64卷 4608-4614页

作者：赵小强薛永飞兰州理工大学电气工程与信息工程学院甘肃兰州730050 甘肃省制造业信息化工程技术研究中心甘肃兰州730050

针对全潜结构投影法(T-PLS)在检测非线性过程故障时误报率和漏报率较高的缺点,提出了基于核函数的全潜结构投影法(KT-PLS)。该算法通过核函数将过程数据从低维输入空间非线性地映射到高维特征空间,实现非线性问题的线性化;然后在质量变... 详细信息

针对全潜结构投影法(T-PLS)在检测非线性过程故障时误报率和漏报率较高的缺点,提出了基于核函数的全潜结构投影法(KT-PLS)。该算法通过核函数将过程数据从低维输入空间非线性地映射到高维特征空间,实现非线性问题的线性化;然后在质量变量的引导下将特征空间分为与质量直接相关、与质量正交、与质量无关和残差四个子空间;最后分别构建D和Q统计量进行故障检测。将该算法应用到Tennessee Eastman process(TEP),多种故障模式下的仿真结果表明,KT-PLS比T-PLS更适合监控具有强非线性的生产过程。

关键词：安全计算机模拟动态仿真化工过程故障检测 KT—PLS

Research on the acoustic performance with unsteady excitation based LBM method

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Research on the acoustic performance with unsteady excitatio...

第十一届南方计算力学学术会议（SCCM-11）

作者： xue yongfei Wang Hong Liu Zhimig Xie Junlong Henan University of Technology Huazhong University of Science and Technology

In this paper, a two-dimensional lattice jet model is obtained, based on the Lattice Boltzmann Method(LBM) of D2G9 model, using the non-equilibrium extrapolation boundary conditions, considering the periodic excitation conditions momentum thickness at the entry in non-steady state, adopting the Lagrange density of macro-discrete system to present the sound field. under the conditions of different incentives under the low Mach number flow field and sound field, given the results of characteristic line, and CFD, finite element calculations in good agreement with the literature.

关键词： lattice Boltzmann method unsteady excitation Lagrange density acoustic performance

Industrial operation optimization under the influence of randomness

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Industrial operation optimization under the influence of ran...

第35届中国过程控制会议

作者： Junlin Xiang Ling Li Junming Chen yongfei xue Hangli Long School of Electrical and Information Engineering Changsha University of Science and Technology School of Electronic Information and Physics Central South University of Forestry and Technology

Process optimization has achieved a wide range of applications in industry. Conventionally, the optimization process assumes that the operating parameters are identical to the optimization settings. Nevertheless, random fluctuations in the control loop can cause the parameters to vary. This can result in optimization results that exceed the established boundaries, which may compromise the safety of production. Therefore, this paper proposes an improved method for distributionally robust optimization in industrial production. The method considers the stochastic performance of control loop to obtain accurate and safe optimal solution that are achievable in industrial ***, the controller output is considered to contain a trend and a smooth random term. Secondly, the separated smoothed stochastic terms are categorized to accurately describe their uncertainty. Finally, an improved distributionally robust optimizing model is constructed to account for the stochastic performance of the ***, the effectiveness of the method is verified by an actual hydrocracking process.

关键词： Operation optimization Distributionally robust optimization Control loops Stochatic performance

可变窗自适应核主元分析的化工过程故障诊断算法

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东南大学学报（自然科学版） 2013年第A01期43卷 93-97页

作者：赵小强杨武薛永飞兰州理工大学电气工程与信息工程学院兰州730050

针对核主元分析法(KPCA)处理非线性时变化工过程故障诊断易产生误报的问题,提出一种基于可变窗技术的快速自适应核主元分析(AKPCA)故障诊断算法.该算法在过程监控中当大量的数据块来临时,分别对KPCA模型进行迭代更新和复旧处理,通过计算... 详细信息

针对核主元分析法(KPCA)处理非线性时变化工过程故障诊断易产生误报的问题,提出一种基于可变窗技术的快速自适应核主元分析(AKPCA)故障诊断算法.该算法在过程监控中当大量的数据块来临时,分别对KPCA模型进行迭代更新和复旧处理,通过计算SPE和T2统计量来调节滑动窗的尺寸,从而实现KPCA模型的进一步更新,克服了传统的自适应KPCA方法只能够处理某个时刻的一个观察点数据的缺点,能够有效地排除异常样本影响,从而提高时变过程性能检测的准确性.将该方法应用于酮苯脱蜡过程的监控中.与KPCA、滑动窗KPCA(MWKP-CA)的监测性能进行比较,仿真结果表明该方法能够很好地降低过程故障的误报率,对非线性时变的化工过程具有更可靠的检测性能.

关键词：故障诊断核主元分析可变窗酮苯脱蜡

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两种轴向蜗壳内部流动的数值分析

华中科技大学学报（自然科学版） 2006年第6期34卷 96-98页

作者：吴克启杨静薛永飞华中科技大学能源与动力工程学院湖北武汉430074

采用三维雷诺时均NS方程和标准kε湍流模型,对包含叶轮、无叶扩压器与轴向蜗壳于一体的子午加速风机进行了整机全流道的数值模拟.比较了这两种不同结构的蜗壳的内流特性.计算结果表明,非对称圆蜗壳在周向可以获得更加均匀的气流分布,整... 详细信息

采用三维雷诺时均NS方程和标准kε湍流模型,对包含叶轮、无叶扩压器与轴向蜗壳于一体的子午加速风机进行了整机全流道的数值模拟.比较了这两种不同结构的蜗壳的内流特性.计算结果表明,非对称圆蜗壳在周向可以获得更加均匀的气流分布,整个流动过程中流动损失较小,对流动更为有利.这一结果对不同蜗壳的选择以及蜗壳的改善提供了参考.

关键词：轴向蜗壳数值模拟内流特性

基于改进状态转移算法的串级平推流反应器动力学参数估计

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化工学报 2019年第2期70卷 607-616页

作者：薛永飞王雅琳孙备李钱钟孙家舟中南大学信息科学与工程学院湖南长沙410083 中国科学院自动化研究所北京100190

实际化工过程反应系统通常由若干个相互关联的平推流反应器串级构成,要建立其机理模型,并估计其动力学参数,就必须反复求解大规模非线性微分方程组,计算代价较高。针对智能优化算法在求解昂贵优化问题时计算成本过高,而工业过程模型往... 详细信息

实际化工过程反应系统通常由若干个相互关联的平推流反应器串级构成,要建立其机理模型,并估计其动力学参数,就必须反复求解大规模非线性微分方程组,计算代价较高。针对智能优化算法在求解昂贵优化问题时计算成本过高,而工业过程模型往往只需要找到一组满意解即可的特点,提出了一种基于改进状态转移算法的串级平推流反应器动力学参数估计方法。该算法在保留标准状态转移算法全局寻优能力和快速收敛能力的同时,利用对立算子优化初始种群,并根据误差阈值判定满意解中止条件,可有效节约计算时间。以实际炼油企业的加氢裂化装置为研究对象,采用所提方法对其反应系统的动力学参数进行估计,仿真结果表明了所提方法的有效性。

关键词：串级平推流反应器反应动力学动力学模型参数估值状态转移算法昂贵优化满意解

A preliminary study on K-ras,EGFR,and B-raf mutations of esophageal squamous cell carcinoma

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The Chinese-German Journal of Clinical Oncology 2011年第9期10卷 497-501页

作者： Huili Ma yongfei xue Changsheng Li Jingwei Zhang Zhonghai Ren Departments of Oncology Nanyang Center Hospital Nanyang 473000 China

Objective: Molecular targeted drugs have been widely used in clinical application which has successfully prolonged some patients' life. Meanwhile, molecular targeted drug therapy for esophageal cancer are attracting more and more attention from doctors and experts. However, little study has been done towards the effect of this approach for treating esophageal squamous cell carcinoma. This paper, therefore, intends to explore the possibilities of applying EGFR-TKI inhibitors or anti-EGFR monoclonal antibody in esophageal squamous cell carcinoma by studying the mutations of EGFR, K-ras and B-raf in the esophageal squamous cell carcinoma tissues. Methods: Thirty-five cases of resected specimens of diagnosed esophageal squamous cell carcinoma with complete clinical and pathological data from January to April 2009 were collected. Pyrophosphate was used for observing the mutations of EGFR, K-ras and B-raf in the esophageal squamous cell carcinoma tissues. Results: Examinations were undertaken respectively to the codon segment 746-754 of exon 19 in EGFR genes, codon 12 and 13 in K-ras genes as well as condon 600 in B-raf genes. No mutation was found in EGFR and B-raf genes with mutation rate 0% (0/35), all of codon 12 in K-ras genes were wild-type without any mutation, while 2 specimens of codon 13 had mutations with mutation rate of 5.71% (2/35). Conclusion: In treating esophageal squamous cell carcinoma patients, all K-ras genes are expressed as wild type due to low mutation rate; cetuximab is effective due to low mutation rate of B-raf while EGFR-TKI inhibitor will not be effective enough because of low mutation rate of EGFR genes.

关键词： carcinoma of esophagus mutation pyro-sequencing molecular targeted drugs gene