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Machine learning prediction model for gray-level co-occurrence matrix features of synchronous liver metastasis in colorectal cancer

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1571-1581页

作者： Kai-Feng Yang sheng-jie li Jun Xu Yong-Bin Zheng Department of Gastrointestinal Surgery Renmin Hospital of Wuhan UniversityWuhan 430030Hubei ProvinceChina Department of Gastrointestinal Surgery The First College of Clinical Medical ScienceChina Three Gorges UniversityYichang Central People’s HospitalYichang 443008Hubei ProvinceChina

BACKGROUND Synchronous liver metastasis(SLM)is a significant contributor to morbidity in colorectal cancer(CRC).There are no effective predictive device integration algorithms to predict adverse SLM events during the diagnosis of *** To explore the risk factors for SLM in CRC and construct a visual prediction model based on gray-level co-occurrence matrix(GLCM)features collected from magnetic resonance imaging(MRI).METHODS Our study retrospectively enrolled 392 patients with CRC from Yichang Central People’s Hospital from January 2015 to May *** were randomly divided into a training and validation group(3:7).The clinical parameters and GLCM features extracted from MRI were included as candidate *** prediction model was constructed using a generalized linear regression model,random forest model(RFM),and artificial neural network *** operating characteristic curves and decision curves were used to evaluate the prediction *** Among the 392 patients,48 had SLM(12.24%).We obtained fourteen GLCM imaging data for variable screening of SLM prediction *** difference,mean sum,sum entropy,sum variance,sum of squares,energy,and difference variance were listed as candidate variables,and the prediction efficiency(area under the curve)of the subsequent RFM in the training set and internal validation set was 0.917[95%confidence interval(95%CI):0.866-0.968]and 0.09(95%CI:0.858-0.960),*** A predictive model combining GLCM image features with machine learning can predict SLM in *** model can assist clinicians in making timely and personalized clinical decisions.

关键词： Colorectal cancer Synchronous liver metastasis Gray-level co-occurrence matrix Machine learning algorithm Prediction model

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New Second-order Contingent Epiderivatives and Set-valued Optimization Problems

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Acta Mathematicae Applicatae Sinica 2016年第4期32卷 983-994页

作者： sheng-kun ZHU sheng-jie li College of Economic Mathematics Southwestern University of Finance and Economics College of Mathematics and Statistics Chongqing University

In this paper, we introduce the concept of second-order compound contingent epiderivative for set-valued maps and discuss its relationship to the second-order contingent epiderivative. Simultaneously, we also investigate some special properties of the second-order compound contingent epiderivative. By virtue of the second-order compound contingent epiderivative, we establish some unified second-order sufficient and necessary optimality conditions for set-valued optimization problems. All results in this paper generalize the corresponding results in the literature.

关键词： set-valued optimization second-order compound contingent epiderivative optimality conditions

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Some Minimax Problems in Lexicographic Order

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Acta Mathematicae Applicatae Sinica 2017年第1期33卷 193-200页

作者： Yu ZHANG sheng-jie li College of Statistics and Mathematics Yunnan University of Finance and Economics College of Mathematics and Statistics Chongqing University

In this paper, minimax theorems and saddle points for a class of vector-valued mappings f（x, y） = u（x）＋ β（x）v（y） are first investigated in the sense of lexicographic order, where u, v are two general vector-valued mappings and β is a non-negative real-valued function. Then, by applying the existence theorem of lexicographic saddle point, we investigate a lexicographic equilibrium problem and establish an equivalent relationship between the lexicographic saddle point theorem and existence theorem of a lexicographic equilibrium problem for vector-valued mappings.

关键词： vector Optimization Minimax theorem Lexicographic saddle point lexicographic equilibriumproblem

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Painlev-Kuratowski Convergences of the Solution Sets to Perturbed Generalized Systems

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Acta Mathematicae Applicatae Sinica 2012年第2期28卷 361-370页

作者： Zhi-miao FANG sheng-jie li College of Mathematics and Statistics Chongqing UniversityChongqing 4013031China

In this paper, we obtain the Painleve-Kuratowski Convergence of the efficient solution sets, the weak efficient solution sets and various proper efficient solution sets for the perturbed generalized system with a sequ... 详细信息

关键词： Painleve-Kuratowski convergence Camma-convergence continuous convergence perturbedgeneralized systems Scalarization

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Upper Semicontinuity of Parametric Lexicographic Vector Equilibrium Problems

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Acta Mathematicae Applicatae Sinica 2018年第4期34卷 856-862页

作者： Zhi-miao FANG sheng-jie li Department of Basic Course Chongqing Police College Chongqing 401331 China College of Mathematics and Statistics Chongqing University Chongqing 401331 China

In this paper, lexicographic vector equilibrium problems are investigated. By using the idea of sequential process, the upper semicontinuity and closedness of the solution set map are established for a parametric lexi... 详细信息

关键词： lexicographic vector equilibrium problem upper semicontinuity closedness

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On Ekeland's Variational Principle for Set-Valued Mappings

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Acta Mathematicae Applicatae Sinica 2007年第1期23卷 141-148页

作者： sheng-jie li Wen-yan Zhang College of Mathematics and Science Chongqing University Chongqing 400044 China

In this paper, we derive a general vector Ekeland variational principle for set-valued mappings, which has a dosed relation to εk^0 -efficient points of set-valued optimization problems. The main result presented in ... 详细信息

关键词： Vector Ekeland variational principle nonlinear scalarization function metric space set-valued mapping

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Variational quantum algorithms for trace norms and their applications

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Communications in Theoretical Physics 2021年第10期73卷 90-96页

作者： sheng-jie li Jin-Min liang Shu-Qian Shen Ming li College of Science China University of Petroleum266580 QingdaoChina School of Mathematical Sciences Capital Normal University100048 BeijingChina

The trace norm of matrices plays an important role in quantum information and quantum computing. How to quantify it in today’s noisy intermediate scale quantum(NISQ) devices is a crucial task for information processing. In this paper, we present three variational quantum algorithms on NISQ devices to estimate the trace norms corresponding to different *** with the previous methods, our means greatly reduce the requirement for quantum resources. Numerical experiments are provided to illustrate the effectiveness of our algorithms.

关键词： quantum algorithm trace norm variational algorithm

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Continuity of Solutions for Parametric Set Optimization Problems via Scalarization Methods

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Journal of the Operations Research Society of China 2021年第1期9卷 79-97页

作者： Pei-Pei liu Hong-Zhi Wei Chun-Rong Chen sheng-jie li College of Mathematics and Statistics Chongqing UniversityChongqing 401331China

The aim of this paper is to investigate the continuity of solution mappings for para-metric set optimization problems with upper and lower set less order relations by scalarization ***,we recall some linear and nonlinear scalarization prop-erties used to characterize the set order ***,we introduce new monotonicity concepts of the set-valued mapping by linear and nonlinear scalarization ***,we obtain the semicontinuity and closedness of solution mappings for parametric set optimization problems(both convex and nonconvex cases)under the monotonicity assumption and other suitable *** results achieved do not impose the continuity of the set-valued objective mapping,which are obviously different from the related ones in the literature.

关键词： Upper semicontinuity Lowersemicontinuity Parametricset optimization problems Scalarization Monotonicity

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Enhancing the photoelectrocatalytic performance of metal-free graphdiyne-based catalyst

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Science China Chemistry 2020年第8期63卷 1040-1045页

作者： Ming li Hong-Juan Wang Chao Zhang Yong-Bin Chang sheng-jie li Wen Zhang Tong-Bu Lu International Joint Laboratory of Materials Microstructure Ministry of EducationInstitute for New Energy Materials and Low Carbon TechnologiesSchool of Material Science and EngineeringTianjin University of TechnologyTianjin 300384China

As a new member of the carbon family,graphdiyne is an intrinsic semiconductor featuring a natural bandgap,which endues it potential for direct application in photoelectric ***,without cooperating with other active materials,conventional hexacetylene-benzene graphdiyne(HEB-GDY)shows poor performances in photocatalysis and photoelectric devices due to its non-ideal visible light absorption,low separation efficiency of the photogenerated carriers and insufficient sites for hydrogen ***,we report a molecular engineering strategy for the regulation of GDY-based carbon materials,by incorporating a strong pyrene absorption group into the matrix of graphdiyne,to obtain pyrenyl graphdiyne(Pyr-GDY)nanofibers through a modified Glaser-Hay coupling reaction of 1,3,6,8-tetraethynylpyrene(TEP)*** comparison,phenyl graphdiyne(Phe-GDY)nanosheets were also constructed using 1,3,4,6-tetraethynylbenzene(TEB)as a *** with Phe-GDY,Pyr-GDY exhibits a wider visible light absorption band,promoted efficiency of the charge separation/transport and more sufficient active sites for water *** a result,Pyr-GDY alone displays superior photoelectrocatalytic performance for water splitting,giving a cathode photocurrent density of^138μA cm-2 at a potential of-0.1 Vversus normal hydrogen electrode(NHE)in neutral aqueous solution,which is almost ten and twelve times as high as those of Phe-GDY(14μA cm-2)and HEB-GDY(12μA cm-2),*** a performance is also superior to those of most reported carbonbased metal-free *** results of theoretical calculations reveal that the carbon atoms in the acetylene bonds are the active sites for proton *** work offers a new strategy for the construction of graphdiyne-based metal-free photoelectrocatalysts with enhanced photoelectrocatalytic performance.

关键词： graphdiyne metal-free photocathode photoelectrocatalyst water splitting

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Novel high-safety aeroengine performance predictive control method based on adaptive tracking weight

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Chinese Journal of Aeronautics 2024年第7期37卷 352-374页

作者： Qian CHEN Hanlin sheng jie ZHANG Jiacheng li College of Energy and Power Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Increasing attention has been attracted to the dynamic performance and safety of advanced performance predictive control systems of the next-generation *** latest research demonstrates that Subspace-based Improved Model Predictive Control(SIMPC)can overcome the difficulty in solving the predictive model in MPC/NMPC ***,applying constant design parameters cannot maintain consistent control effects in all ***,the designed system relies too much on sensor-measured data,and thus it is difficult to thoroughly validate the safety of the system because of its high *** means that any potential hardware/software faults will endanger the ***,this paper first presents a novel nonlinear mapping relationship to adaptively tune the tracking weight online with the change of Power Lever Angle(PLA)and real-time relative tracking ***,without introducing additional design parameters,an Adaptive Tracking Weight-based SIMPC(ATW-SIMPC)controller is designed to improve the control performance in all operating states ***,a Primary/Backup Hybrid Control(PBHC)strategy with the ATW-SIMPC controller as the primary system and the traditional speed(Nf)controller as the backup system is proposed to ensure *** designed affiliated switching controller and the real-time monitor therein can be used to realize reasonable and smooth switching between primary/backup systems,so as to avoid bump *** PBHC system switches to the Nf controller when the ATW-SIMPC controller is wrong because of potential hardware/software faults;otherwise,the ATW-SIMPC controller keeps acting on the *** main results prove that the ATW-SIMPC controller with the optimal nonlinear mapping relationship,compared with the existing SIMPC controller,uplifts the dynamic control performance by 32%and reduces overshoots to an allowable limit,resulting in a better control effect in full *** comparison results consistently i

关键词： Aeroengine Model predictive control Hybrid system Adaptive weight Safety

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