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A Nonnegative Garrote-based Method for Multivariate Fault Isolation 36

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A Nonnegative Garrote-based Method for Multivariate Fault Is...

第36届中国控制会议

作者： yi-Min Guo Jian-Guo Wang Bang-Hua Yang Shi-Wei Ma Min-Rui Fei Li-Lan Liu Hui Xu Yuan Yao yi-ping wu School of Mechatronical Engineering and Automation Shanghai UniversityShanghai Key Lab of Power Station Automation Technology Department of Chemical Engineering National Tsing-Hua University Shanghai Baosight Software Co Ltd

ISBN: (纸本)9781538629185

Fault isolation is an essential step in multivariate statistical process monitoring,which discovers the cause of the detected *** common adopted techniques for fault isolation,such as contribution plots,reconstruction analysis,branch and bound,etc.,often suffer from the problems of the smearing effect,insufficient historical fault data,and heavy computational *** this paper,the nonnegative garrote（NNG） estimator is utilized for multivariate statistical fault isolation,which solves the problems of the existing *** proposed method is based on the finding that there is equivalence between fault isolation and variable selection in discriminant *** from the existing methods,the NNG-based fault isolation method does not suggest a single set of faulty ***,it provides a sequence of process variables according to their responsibilities for the detected *** results are informative for diagnosing the root cause of the fault.

关键词： Fault isolation Variable selection Nonnegative garrote Process monitoring

A Deep Learning-based Operation Optimization Strategy for BFG/coal Co-firing Boiler 36

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A Deep Learning-based Operation Optimization Strategy for BF...

第36届中国控制会议

作者： Jian-Guo Wang Jin-Qiu Min Li-Lan Liu Bang-Hua Yang Shi-Wei Ma Min-Rui Fei yi-Min Guo Yuan Yao yi-ping wu School of Mechatronical Engineering and Automation Shanghai UniversityShanghai Key Lab of Power Station Automation Technology Department of Chemical Engineering National Tsing-Hua University Shanghai Baosight Software Co Ltd

ISBN: (纸本)9781538629185

How to operate a BFG/coal co-firing boiler in high efficiency is challenging for a gas/solid multi-fuel combustion *** operation data from a real boiler,this study proposes an operation optimization strategy of BFG/coal co-firing boiler based on deep ***,the thermal efficiency model is constructed based on deep learning with all the actual sampling data,which outperform the other modeling ***,the high efficiency data being selected as labeled data,a deep learning-based model of air flow is *** needs to be emphasized that,to take full advantage of all available information and improve the model accuracy,all the labeled and unlabeled data are utilized in auto-coder learning of the air flow ***,the constructed air flow model is used for the operation optimization and the thermal efficiency model is used to evaluate the level efficiency *** high accuracy of the proposed modeling approaches makes the implementation of the operation optimization strategy readily practicable.

关键词： BFG/coal co-firing thermal efficiency auto-coder deep learning data-driven

Simultaneous Identification of Parameter and Time-delay Based on Subspace Method and Cross-correlation Function 36

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Simultaneous Identification of Parameter and Time-delay Base...

第36届中国控制会议

作者： Jian-Guo Wang Zhi-Fu Deng Bang-Hua Yang Shi-Wei Ma Min-Rui Fei Li-Lan Liu Yuan Yao Tao Chen yi-ping wu School of Mechatronical Engineering and Automation Shanghai UniversityShanghai Key Lab of Power Station Automation Technology Department of Chemical Engineering “Tsing-Hua University” Department of Chemical and Process Engineering University of Surrey Shanghai Baosight Software Co Ltd

ISBN: (纸本)9781538629185

Both the plant parameter4 and delay time of the system may vary in the time-varying system, which makes system identification relatively complex. In this paper, a new system identification algorithm based on subspace method and cross-correlation function is proposed to identify system parameter and time-delay simultaneously. The time delay is identified with the calculation of the cross-correlation function between pre-processed input data that processed through initial plant parameters and original output data. Then, the time delay in the output data can be deleted with the time delay identified before and the parameters can be achieved by subspace identification algorithm. Therefore, the process parameters and time delay identification can be performed online by through above two alternative operations. The validity of the proposed identification algorithm is verified by the simulation study.

关键词： Subspace Method Cross-Correlation Time-Varying Identification

变革型领导、社会交换关系对员工工作场景中主观幸福感的影响

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软科学 2017年第2期31卷 61-65页

作者：谢义忠吴萍南京理工大学经济管理学院南京210094 中国科学院心理研究所北京100101

以变革型领导和社会交换理论为基础,探讨中国背景下变革型领导对员工工作场景中主观幸福感(工作满意度和工作投入)的影响及其作用机制"黑箱"。应用结构方程模型等对668个员工的两轮追踪问卷调查数据进行统计分析。结果表明,工作场景中... 详细信息

以变革型领导和社会交换理论为基础,探讨中国背景下变革型领导对员工工作场景中主观幸福感(工作满意度和工作投入)的影响及其作用机制"黑箱"。应用结构方程模型等对668个员工的两轮追踪问卷调查数据进行统计分析。结果表明,工作场景中三种不同层次的社会交换(领导—成员交换、团队—成员交换和感知的组织支持)分别部分中介变革型领导对员工工作满意度的影响,而领导—成员交换和团队—成员交换分别部分中介变革型领导对员工工作投入的影响。

关键词：变革型领导社会交换主观幸福感

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Microstructure, texture and mechanical properties of Mg-8Gd-4Y-1Nd-0.5Zr alloy prepared by pre-deformation annealing, hot compression and ageing

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Transactions of Nonferrous Metals Society of China 2019年第5期29卷 976-983页

作者： yi-ping wu Han-qing XIONG Yu-zhen JIA Shao-hui XIE Guo-feng LI Department of Mechanical and Electrical Engineering Changsha UniversityChangsha 410022China Bichamp Cutting Technology (Hunan) Co. Ltd.Changsha 410200China

An extruded Mg-8Gd-4Y-1Nd-0.5Zr alloy was pre-heated at 470℃ for 1 h and subsequently compressed at 470℃ and two strain rates of 0.2 and 0.0003 s^-1. Microstructure, texture and mechanical properties of the alloy were examined by optical microscopy (OM), scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), hardness test and tensile test. The results show that the post-deformed microstructures of alloy are non-uniform at both strain rates due to the dissolution of RE-rich particles and the occurrence of DRX. The textures of post-deformed alloy are affected by strain rate. The alloy exhibits a strong basal texture of (0001)//ND (normal direction) after compression at 0.2 s^-1, while a weak texture component of (0001)//ED (extrusion direction) is formed in the compression obtained at 0.0003 s^-1. Compared with the alloy compressed at 0.0003 s^-1, the compressed alloy obtained at 0.2 s^-1 presents better comprehensive mechanical properties with the ultimate tensile strength of 426 MPa, yield strength of 345 MPa and ductility of 2.1% when being aged at 225℃ for 8 h.

关键词： magnesium alloys strain rate microstructure texture mechanical properties

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A Soft Sensing Method for Operation Optimization of Coke Dry Quenching Process 36

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A Soft Sensing Method for Operation Optimization of Coke Dry...

第36届中国控制会议

作者： Jian-Guo Wang Zhi-Duo Cao Li-Lan Liu Bang-Hua Yang Shi-Wei Ma Min-Rui Fei Zhi-Fu Deng Yuan Yao yi-ping wu School of Mechatronical Engineering and Automation Shanghai UniversityShanghai Key Lab of Power Station Automation Technology Department of Chemical Engineering “Tsing-Hua University” Shanghai Baosight Software Co Ltd

ISBN: (纸本)9781538629185

Based on the actual data analysis, it is found in this paper that the supplementary air flow rate in the CDQ operation didn’t follow the variation of the discharge rate of incandescent coke well, which results in the concentration increase of combustible gas in the exhaust gas and the decrease of economic efficiency. The correlation analysis results show that the introduced derived variables are more useful than some plain variables for the purpose of prediction. Next, to handle the contradiction between the steam productivity and the coke burning loss, a new economic efficiency index is introduced by synthesizing the two competing aspects. A kind of soft sensor of economic efficiency is put forward by combining nonnegative garrote（NNG） variable selection algorithm with the autoregressive integrated moving average（ARIMA） model, which gives a good solution to the economic efficiency real-time prediction problem of CDQ system. Then, the implementation of model-based optimization is studied based on the actual operation data. The results show that there exists large room for economic efficiency promotion.

关键词： Soft sensor Coke dry quenching Data-driven Variable selection Autoregressive integrated moving average

Expression of G3BP and RhoC in esophageal squamous carcinoma and their effect on prognosis

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World Journal of Gastroenterology 2007年第30期13卷 4126-4130页

作者： Hui-Zhong Zhang Jin-Geng Liu yi-ping Wei Cheng wu Yong-Ke Cao Mei Wang Department of Cardiothoracic Surgery The Second Affiliated Hospital Sun Yat-Sen University 107 Yan- Jiang Road Guangzhou 510120 Guangdong Province China

AIM: To investigate the expression and significance of G3BP and RhoC proteins in esophageal squamous carcinoma (ESC). METHODS: The expression of G3BP and Rhoc proteins in 80 cases of ESC was detected by immunohistochemistry. The relationship was studied between the expression of the two proteins and tumor size, differentiation degree, TNM stage, lymph node metastasis and prognosis of ESC. RESULTS: The positive expression rate of G3BP in ESC was 71.25%; and the rate in the lymph node metastasis group was significantly higher than that in the non- lymph node metastasis group (Z = -2.283, P = 0.022), but no relations were found between G3BP expression and tumor size, differentiation degree and TNM stage (P > 0.05). The group with G3BP positive expression had shorter survival time than the group with G3BP negative expression (P = 0.000). The positive expression rate of RhoC in ESC was 66.25%; and the rate in the lymph node metastasis group was significantly higher than that in the non-lymph node metastasis group (Z = -2.115, P 0.05). The RhoC positive expression group had a shorter survival time than the RhoC negative expression group (P < 0.001. The expression of G3BP protein correlated positively with the expression of RhoC in ESC tissues (rs = 0.656, P < 0.001). CONCLUSION: The expression of G3BP and RhoC protein is closely related to the lymph node metastasis and survival in ESC patients. G3BP and RhoC proteins can be considered as predictors of prognosis in ESC patients.

关键词： Esophageal neoplasm G3BP RhoC Immunohistochemistry Lymph node metastasis Prognosis

Identifying the dynamic behaviors in complete reconstruction of Co-based complex precatalysts during electrocatalytic oxygen evolution

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Journal of Energy Chemistry 2025年第1期100卷 226-233页

作者： Jingfang Zhang Danyang wu Linke Cai Youluan Lu Fanpeng Cheng Lijuan Shi Qun yi Yao Liu yi Huang Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Hubei Key Laboratory of Novel Reactor and Green Chemical Technology School of Chemical Engineering & Pharmacy Wuhan Institute of Technology Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction of Ministry of Education College of Chemistry Central China Normal University College of Materials Science and Engineering Fuzhou University

Transition metal-based nanomaterials have emerged as promising electrocatalysts for oxygen evolution reaction（OER）. Considerable research efforts have shown that self-reconstruction occurs on these nanomaterials under operating conditions of OER process. However, most of them undergo incomplete reconstruction with limited thickness of reconstruction layer, leading to low component utilization and arduous exploration of real catalytic mechanism. Herein, we identify the dynamic behaviors in complete reconstruction of Co-based complexes during OER. The hollow phytic acid（PA） cross-linked CoFe-based complex nanoboxes with porous nanowalls are designed because of their good electrolyte penetration and mass transport ability, in favor of the fast and complete reconstruction. A series of experiment characterizations demonstrate that the reconstruction process includes the fast substitution of PA by OH-to form Co（Fe）(OH)xand subsequent potential-driven oxidation to Co（Fe）OOH. The obtained CoFeOOH delivers a low overpotential of 290 mV at a current density of 10 mA cm-2and a long-term *** experiment results together with theory calculations reveal that the Fe incorporation can result in the electron rearrangement of reconstructed CoFeOOH and optimization of their electronic structure,accounting for the enhanced OER activity. The work provides new insights into complete reconstruction of metal-based complexes during OER and offers guidelines for rational design of high-performance electrocatalysts.

关键词： Oxygen evolution reaction

Tuning the interfacial reaction environment via pH-dependent and induced ions to understand C–N bonds coupling performance in NO3- integrated CO2 reduction to carbon and nitrogen compounds over dual Cu-based N-doped carbon catalyst

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Journal of Energy Chemistry 2025年第1期100卷 273-285页

作者： Tianhang Zhou Chen Shen Zhenghao wu Xingying Lan yi Xiao College of Carbon Neutrality Future Technology State Key Laboratory of Heavy Oil Processing China University of Petroleum (Beijing) Institute of Materials Science TU Darmstadt Department of Chemistry Xi'an Jiaotong-Liverpool University Department of Mechanical and Mechatronics Engineering and Waterloo Institute of Nanotechnology University of Waterloo Waterloo

Dual atomic catalysts （DAC）,particularly copper （Cu2）-based nitrogen （N） doped graphene,show great potential to effectively convert CO2and nitrate （NO3-） into important industrial chemicals such as ethylene,glycol,acetamide,and urea through an efficient catalytical process that involves C–C and C–N ***,the origin of the coupling activity remained unclear,which substantially hinders the rational design of Cu-based catalysts for the N-integrated CO2reduction reaction （CO2RR）.To address this challenge,this work performed advanced density functional theory calculations incorporating explicit solvation based on a Cu2-based N-doped carbon (Cu2N6C10) catalyst for *** calculations are aimed to gain insight into the reaction mechanisms for the synthesis of ethylene,acetamide,and urea via coupling in the interfacial reaction *** to the sluggishness of CO2,the formation of a solvation electric layer by anions （F-,Cl-,Br-,and I-） and cations (Na+,Mg2+,K+,and Ca2+) leads to electron transfer towards the Cu *** process significantly accelerates the reduction of *** results reveal that*CO intermediates play a pivotal role in N-integrated ***,the Cu2-based N-doped carbon catalyst examined in this study has demonstrated the most potential for C–N coupling to *** findings reveal that through the process of a condensation reaction between*CO and NH2OH for urea synthesis,*NO3-is reduced to*NH3,and*CO2to*CCO at dual Cu atom *** dual-site reduction facilitates the synthesis of acetamide through a nucleophilic reaction between NH3and the ketene ***,we found that the I-and Mg2+ions,influenced by pH,were highly effective for acetamide and ammonia synthesis,except when F-and Ca2+were ***,the mechanisms of C–N bond formation were investigated via ab-initio molecular dynamics simulations,and we found that adjusting the micro-environment can change the dominant side reaction,shift

关键词： Condensation reactions