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Simulation and design of a heat-integrated double-effect reactive distillation process for propylene glycol methyl ether production

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Chinese Journal of Chemical Engineering 2022年第12期52卷 103-114页

作者： Ran An Shengxin Chen shun hou Yuting Zhu Chunhu Li Xinbao Zhu Ruixia Liu Weizhong An Department of Chemical Engineering Ocean University of ChinaQingdao 266100China Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China College of Chemical Engineering Nanjing Forestry UniversityNanjing 210037China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China

A double-effect reactive distillation(DERD)process was proposed for the production of propylene glycol methyl ether from propylene oxide and methanol to overcome the shortcoming of low selectivity and high-energy consumption in the tubular plug-flow reactor.A single-column reactive distillation(RD)process was conducted under optimized operating conditions based on sensitivity analysis as a *** results demonstrated that the proposed DERD process is able to achieve more than 95%selectivity of the desired *** that,a design approach of the DERD process with an objective of the minimum operating cost was proposed to achieve further energy savings in the RD *** proposed DERD configuration can provide a large energy-savings by totally utilization of the overhead vapor steam in the high-pressure RD column.A comparison of the single-column RD process revealed that the proposed DERD process can reduce the operating cost and the total annual cost of 25.3%and 30.7%,respectively,even though the total capital cost of DERD process is larger than that of the RD process.

关键词： Propylene oxide Reactive distillation Heat integration Propylene glycol monomethyl ether Process simulation

Formation of high-density cold molecules via electromagnetic trap

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Chinese Physics B 2022年第10期31卷 371-376页

作者： Ya-Bing Ji Bin Wei Heng-Jiao Guo Qing Liu Tao Yang shun-Yong hou Jian-Ping Yin State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200241China Key Laboratory of Nondestructive Test(Ministry of Education) Nanchang Hangkong UniversityNanchang 330063China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Preparation and control of cold molecules are advancing rapidly, motivated by many exciting applications ranging from tests of fundamental physics to quantum information processing. Here, we propose a trapping scheme to create high-density cold molecular samples by using a combination of electric and magnetic fields. In our theoretical analysis and numerical calculations, a typical alkaline-earth monofluoride, MgF, is used to test the feasibility of our proposal.A cold MgF molecular beam is first produced via an electrostatic Stark decelerator and then loaded into the proposed electromagnetic trap, which is composed of an anti-Helmholtz coil, an octupole, and two disk electrodes. Following that,a huge magnetic force is applied to the molecular sample at an appropriate time, which enables further compressing of the spatial distribution of the cold sample. Molecular samples with both higher number density and smaller volume are quite suitable for the laser confinement and other molecular experiments such as cold collisions in the next step.

关键词： Stark effect Zeeman effect cold molecules

Multi-variable continuous higher-order sliding mode control for PMSM

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Multi-variable continuous higher-order sliding mode control ...

Nonlinear Tracking Control for Quadrotor Aircraft with Disturbance Observer

第30届中国控制与决策会议

作者： hou shun-xiang ZHANG Xing-guo Department of Information Engineering Zhejiang College of Security Technology Department of Science and Technology Nanchang Institute of Science and Technology

This paper proposes a multi-variable continuous higher-order sliding mode control scheme for PMSM according to the characteristic of its dynamic,and a speed controller and current controller are designed. The state feedback is used to decouple the system, and the control problem is changed to the stability control of the uncertain multivariable integral chains. Firstly,a finite time continuous control algorithm is designed to guarantee rapid convergence of system states,and then the multivariable non decoupling quasi continuous polynomial algorithm is designed to achieve robustness of the system uncertainties. The simulation results show that the proposed algorithm is robust to parameter perturbation and load torque disturbance, and it can effectively reduce the chattering of the system.

关键词： permanent magnet synchronous motor(PMSM) continuous high-order sliding mode multi-variable system quasi-continuous polynomial robustness

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Nonlinear Tracking Control for Quadrotor Aircraft with Distu...

Feature Extraction by Correntropy Based Average Neighborhood Margin Maximization

第30届中国控制与决策会议

作者： hou shun-xiang ZHANG Xing-guo Department of Information Engineering Zhejiang College of Security Technology Department of Science and Technology Nanchang Institute of Science and Technology

In order to solve the problem of trajectory tracking control of quad-rotor aircraft with uncertain disturbances, a tracking strategy using an extended state observer to estimate the disturbance in the system was proposed. The strategy is designed by the sliding mode controller considering the estimation to overcome the uncertainty of the model and the disturbance of external uncertainties, and he tracking error of the system are ultimately bounded under the control law. The stability of the controller system designed by the above method is verified by Lyapunov stability theory. Simulation results show that the controller can realize trajectory tracking control of aircraft.

关键词： quad-rotor aircraft disturbance observer sliding mode control backstepping control trajectory tracking

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Feature Extraction by Correntropy Based Average Neighborhood...

第26届中国控制与决策会议

作者： Lin-Na Ma Hong-Jie Xing shun-Yan hou Key Laboratory of Machine Learning and Computational Intelligence College of Mathematics and Computer ScienceHebei University College of Electronics and Information Engineering Hebei University

ISBN: (纸本)9781479937097

Average neighborhood margin maximization（ANMM） is a feature extraction method to make homogeneous points collect as near as possible and heterogeneous points disperse as far away as possible. To enhance the anti-noise ability of ANMM, correntropy based average neighborhood margin maximization（CANMM） is proposed in this paper. This method utilizes correntropy to substitute the Euclidean distance for measuring the similarity between the given data, and uses the maximum correntropy criterion to replace the maximum distance criterion, which makes CANMM more robust. The experimental results on three benchmark face databases validate the effectiveness of the proposed method.

关键词： Feature Extraction Half-quadratic optimization Correntropy ANMM

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边水油藏调剖调驱潜力评价与效果分析

石油天然气学报 2009年第2期31卷 107-110页

作者：江厚顺中国石油勘探开发研究院采油所北京100083 长江大学石油工程学院湖北荆州434023

针对G油藏的实际地质情况,通过考虑剩余油分布、可采储量、油藏非均质性以及水流优势通道等参数对其调剖调驱潜力进行了评价。运用双对数模型、威布尔模型、俞启泰模型、灰色系统模型对G油藏产油量进行了预测。对比调剖调驱后的产油量... 详细信息

针对G油藏的实际地质情况,通过考虑剩余油分布、可采储量、油藏非均质性以及水流优势通道等参数对其调剖调驱潜力进行了评价。运用双对数模型、威布尔模型、俞启泰模型、灰色系统模型对G油藏产油量进行了预测。对比调剖调驱后的产油量与按自然递减计算得出的产油量,来评价调剖调驱增油效果,并结合油田实际生产数据进行了相关计算。计算结果表明,G油藏通过调剖调驱治理边水是可行的。认为G油藏调剖调驱前用威布尔模型预测较好,调剖调驱后用灰色系统模型预测较好。

关键词：潜力评价效果分析边水油藏调剖调驱

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广义Hadamard积

天津纺织工学院学报 2000年第4期19卷 6-7页

作者：樊顺厚天津纺织工学院教务处天津300160

对 Hadamard积进行推广 ,定义了矩阵间的一种新运算 ,称为广义 Hadamard积 .给出了广义 Hadamard积的一些性质 ,并证明了矩阵分析中的几个重要结论 .

关键词：矩阵分析广义Hadamard积 Kronecker积运算

Biological Function and Mechanism of Long Noncoding RNAs Nuclear-Enriched Abundant Transcript I in Development of Cervical Cancer

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Chinese Medical Journal 2018年第17期131卷 2063-2070页

作者： Hui-Ling Wang shun-Yu hou Hai-Bo Li Jian-Ping Qiu Le Bo Cai-Ping Mao Reproductive Medicine Center The First Affiliated Hospital of Soochow University Suzhou Jiangsu 215006 China Department of Gynaecology The Affiliated Suzhou Hospital of Nanjing Medical University Suzhou Jiangsu 215000 China

Background： Accumulating documents have demonstrated that long noncoding RNAs （lncRNAs） play critical roles in tumorigenesis. As an lncRNA, nuclear-enriched abundant transcript 1 （NEAT1） has been identified to be involved in the progression of many types of cancers. However, the biological function of NE.4T1 in cervical cancer is not fully investigated. The aim of this study was to disclose the specific biological function of lncRNA NEATI in cervical cancer progression. Methods： Quantitative real-time polymerase chain reaction （qRT-PCR） was utilized to identify the expression of lncRNA NE,4 T1 in the cervical cancer tissues and cell lines. All cervical cancer samples used in this study were collected from the Affiliated Suzhou Hospital of Nanjing Medical University between September 2012 and September 2017. The correlation between NE,4T1 expression and the overall survival rate of cervical cancer patients was analyzed by Kaplan-Meier analysis. The effects of NEAT1 knockdown or overexpression on cell proliferation were tested by performing MTT assays and colony formation assays. Transwell assays were conducted to detect the migratory ability of cervical cancer cells, in which NEAT1 was silenced or overexpressed. Western blotting was utilized to validate whether NEAT1 promotes cervical cancer progression through activating PI3K-Akt signaling pathway. Results： High expression of NE,4T1 predicted poor prognosis of cervical cancer patients （χ^2= 0.735, P = 0.005）. Knockdown of NE,4T1 decreased the number of colonies in CaSki cell from 136.667 ± 13.503 to 71.667 ± 7.506 （t = -18.76, P = 0.003） and decreased the number of colonies in HeLa cell from 128.667 ± 13.317 to 65.667 ± 7.024 （t = -5.54, P = 0.031）. However, overexpression of NEA T1 increased the number of colonies in SiHa cell from 84.667 ± 12.014 to 150.667 ± 18.037 （t = 7.27, P = 0.018）. Knockdown of NEAT1 decreased the migratory number of CaSki cell from 100.333 ± 9.866 to 58.333 ± 5.859 （t = -8.08, P = 0.015） a

关键词： Cervical Cancer Long Noncoding RNA Nuclear-Enriched Abundant Transcript 1 Migration PI3K/Akt SignalingPathway Proliferation

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纵缝对重力坝地震反应影响的研究

水利学报 2000年第12期31卷 53-58页

作者：涂劲候顺载陈厚群中国水利水电科学研究院工程抗震研究中心北京100044

本文采用显式有限元结合人工透谢边界进行波动分析 ,配合动接触力模型考虑纵缝接触非线性问题 ,用静动组合方法考虑静动荷载的耦合作用 ,形成新的重力坝地震反应分析的计算体系 ,对一典型的含纵缝重力坝进行了地震反应分析 .在考虑地基... 详细信息

本文采用显式有限元结合人工透谢边界进行波动分析 ,配合动接触力模型考虑纵缝接触非线性问题 ,用静动组合方法考虑静动荷载的耦合作用 ,形成新的重力坝地震反应分析的计算体系 ,对一典型的含纵缝重力坝进行了地震反应分析 .在考虑地基辐射阻尼的条件下得出了纵缝的存在及纵缝初始宽度、填充情况。

关键词：纵缝重力坝人工透射边界动接触力法