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The Dantzig Selector:Sparse Signals Recovery via l_(1-q)Minimization Model
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作者 LI Jie DENG Chaohong LI Baode 《新疆大学学报(自然科学版中英文)》 2025年第1期14-23,共10页
We propose the Dantzig selector based on the l_(1-q)(1<q≤2)minimization model for the sparse signal recovery.First,we discuss some properties of l_(1-q)minimization model and give some useful inequalities.Then,we ... We propose the Dantzig selector based on the l_(1-q)(1<q≤2)minimization model for the sparse signal recovery.First,we discuss some properties of l_(1-q)minimization model and give some useful inequalities.Then,we give a sufficient condition based on the restricted isometry property for the stable recovery of signals.The l_(1-2)minimization model of Yin-Lou-He is extended to the l_(1-q)minimization model. 展开更多
关键词 Dantzig selector l_(1-q)minimization model signal recovery restricted isometry property
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Modeling Solid Waste Minimization Performance at Source in Dar es Salaam City, Tanzania
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作者 Abdon Salim Mapunda Richard Joseph Kimwaga Shaaban Ally Kassuwi 《Journal of Geoscience and Environment Protection》 2024年第9期17-32,共16页
Municipal solid waste generation is strongly linked to rising human population and expanding urban areas, with significant implications on urban metabolism as well as space and place values redefinition. Effective man... Municipal solid waste generation is strongly linked to rising human population and expanding urban areas, with significant implications on urban metabolism as well as space and place values redefinition. Effective management performance of municipal solid waste management underscores the interdisciplinarity strategies. Such knowledge and skills are paramount to uncover the sources of waste generation as well as means of waste storage, collection, recycling, transportation, handling/treatment, disposal, and monitoring. This study was conducted in Dar es Salaam city. Driven by the curiosity model of the solid waste minimization performance at source, study data was collected using focus group discussion techniques to ward-level local government officers, which was triangulated with literature and documentary review. The main themes of the FGD were situational factors (SFA) and local government by-laws (LGBY). In the FGD session, sub-themes of SFA tricked to understand how MSW minimization is related to the presence and effect of services such as land use planning, availability of landfills, solid waste transfer stations, material recovery facilities, incinerators, solid waste collection bins, solid waste trucks, solid waste management budget and solid waste collection agents. Similarly, FGD on LGBY was extended by sub-themes such as contents of the by-law, community awareness of the by-law, and by-law enforcement mechanisms. While data preparation applied an analytical hierarchy process, data analysis applied an ordinary least square (OLS) regression model for sub-criteria that explain SFA and LGBY;and OLS standard residues as variables into geographically weighted regression with a resolution of 241 × 241 meter in ArcMap v10.5. Results showed that situational factors and local government by-laws have a strong relationship with the rate of minimizing solid waste dumping in water bodies (local R square = 0.94). 展开更多
关键词 Modeling Solid Waste minimization Dar es Salaam City Ordinary Least Square (OLS) Regression Model Situation Factors Local Government by Laws
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Energy Minimization for Heterogenous Traffic Coexistence with Puncturing in Mobile Edge Computing-Based Industrial Internet of Things
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作者 Wang Xue Wang Ying +1 位作者 Fei Zixuan Zhao Junwei 《China Communications》 SCIE CSCD 2024年第10期167-180,共14页
Puncturing has been recognized as a promising technology to cope with the coexistence problem of enhanced mobile broadband(eMBB) and ultra-reliable low latency communications(URLLC)traffic. However, the steady perform... Puncturing has been recognized as a promising technology to cope with the coexistence problem of enhanced mobile broadband(eMBB) and ultra-reliable low latency communications(URLLC)traffic. However, the steady performance of eMBB traffic while meeting the requirements of URLLC traffic with puncturing is a major challenge in some realistic scenarios. In this paper, we pay attention to the timely and energy-efficient processing for eMBB traffic in the industrial Internet of Things(IIoT), where mobile edge computing(MEC) is employed for data processing. Specifically, the performance of eMBB traffic and URLLC traffic in a MEC-based IIoT system is ensured by setting the threshold of tolerable delay and outage probability, respectively. Furthermore,considering the limited energy supply, an energy minimization problem of eMBB device is formulated under the above constraints, by jointly optimizing the resource blocks(RBs) punctured by URLLC traffic, data offloading and transmit power of eMBB device. With Markov's inequality, the problem is reformulated by transforming the probabilistic outage constraint into a deterministic constraint. Meanwhile, an iterative energy minimization algorithm(IEMA) is proposed.Simulation results demonstrate that our algorithm has a significant reduction in the energy consumption for eMBB device and achieves a better overall effect compared to several benchmarks. 展开更多
关键词 energy minimization enhanced mobile broadband(eMBB)and ultra-reliable low latency communications(URLLC)coexistence industrial Internet of Things(IIoT) mobile edge computing(MEC) PUNCTURING
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Beyond statistical significance:Embracing minimal clinically important difference for better patient care
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作者 Naveen Jeyaraman Madhan Jeyaraman +2 位作者 Swaminathan Ramasubramanian Sangeetha Balaji Sathish Muthu 《World Journal of Methodology》 2025年第1期33-41,共9页
The minimal clinically important difference(MCID)represents a pivotal metric in bridging the gap between statistical significance and clinical relevance,addressing the direct impact of medical interventions from the p... The minimal clinically important difference(MCID)represents a pivotal metric in bridging the gap between statistical significance and clinical relevance,addressing the direct impact of medical interventions from the patient's perspective.This comprehensive review analyzes the evolution,applications,and challenges of MCID across medical specialties,emphasizing its necessity in ensuring that clinical outcomes not only demonstrate statistical significance but also offer genuine clinical utility that aligns with patient expectations and needs.We discuss the evolution of MCID since its inception in the 1980s,its current applications across various medical specialties,and the methodologies used in its calculation,highlighting both anchor-based and distribution-based approaches.Furthermore,the paper delves into the challenges associated with the application of MCID,such as methodological variability and the interpretation difficulties that arise in clinical settings.Recommendations for the future include standardizing MCID calculation methods,enhancing patient involvement in setting MCID thresholds,and extending research to incorporate diverse global perspectives.These steps are critical to refining the role of MCID in patient-centered healthcare,addressing existing gaps in methodology and interpretation,and ensuring that medical interventions lead to significant,patient-perceived improvements. 展开更多
关键词 minimal clinically important difference Patient-centered care Clinical relevance Global health
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Current understanding of adult nephrotic syndrome:Minimal change disease
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作者 Krishna Kumar 《World Journal of Nephrology》 2025年第1期149-152,共4页
The underlying molecular changes that result in minimal change disease(ne-phrotic syndrome)require an in-depth analysis.Current molecular studies have shown the involvement of zinc fingers and homeobox transcriptional... The underlying molecular changes that result in minimal change disease(ne-phrotic syndrome)require an in-depth analysis.Current molecular studies have shown the involvement of zinc fingers and homeobox transcriptional factors in its pathogenesis.The application of therapeutic drugs relies on understanding the cascade of molecular events to determine their efficacy in managing the clinical condition. 展开更多
关键词 minimal change disease Nephrotic syndrome Hyposialylation PODOCYTES ALBUMINURIA
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Innovative diagnostic tool aids screening for minimal hepatic encephalopathy in non-alcoholic cirrhosis patients
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作者 Ting Li Ya-Ping Li 《World Journal of Hepatology》 2025年第1期5-7,共3页
In this editorial we comment on the article by Jiang et al.We focus on the Ence-phalApp Stroop test which is an innovative,smartphone-based tool specifically designed for screening minimal hepatic encephalopathy(MHE)i... In this editorial we comment on the article by Jiang et al.We focus on the Ence-phalApp Stroop test which is an innovative,smartphone-based tool specifically designed for screening minimal hepatic encephalopathy(MHE)in cirrhosis patients.Traditional MHE screening methods,while highly sensitive and specific,are often complex,time-consuming,and require controlled environmental con-ditions,limiting their widespread clinical use.The EncephalApp Stroop test si-mplifies the screening process,enhances diagnostic efficiency,and is applicable across diverse cultural contexts.However,the combination of additional bio-markers could further improve diagnostic accuracy.Despite its promising po-tential,more multicenter clinical studies are required to validate its effectiveness and applicability on a global scale. 展开更多
关键词 EncephalApp Stroop test minimal hepatic encephalopathy CIRRHOSIS biomarkers DIAGNOSTIC
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Minimally invasive pancreaticoduodenectomy:A bibliometric method applied to the top one hundred cited articles
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作者 Jia-Jie Feng Yi-Wen Zhao +2 位作者 Hong-Yin Liang Ke-Xin Jiang Rui-Wu Dai 《World Journal of Gastrointestinal Surgery》 2025年第1期244-256,共13页
BACKGROUND Minimally invasive pancreaticoduodenectomy(MIPD)is considered one of the most complex procedures in general surgery.The number of articles on MIPD has been increasing annually.However,published reports ofte... BACKGROUND Minimally invasive pancreaticoduodenectomy(MIPD)is considered one of the most complex procedures in general surgery.The number of articles on MIPD has been increasing annually.However,published reports often have complex research directions,and the focal points frequently change.Therefore,a comprehensive review and organization of the literature in this field is necessary.AIM To summarize current research,predict future hotspots and trends,and provide insights for MIPD development.METHODS To conduct the study,the Web of Science Core Collection was searched for relevant articles.The analysis focused on the top 100 articles in the field.Two widely used bibliometric tools,CiteSpace and VOSviewer,were used to examine various aspects,including research directions,authors,countries,institutions,journals,and keywords.RESULTS The top 100 articles were published between 2005 and 2022,with the majority originating from the United States(n=51).Among the contributing institutions,Pancreas Center of the University of Chicago and the Health System of the University of Chicago had the highest number of publications(n=17).In terms of individual authors,“Zeh HJ”and“Zureikat AH”led with 13 articles each.The high-frequency keywords in the literature encompassed three main areas:Surgical modality,perioperative outcomes,and the learning curve.These keywords were further categorized into seven primary clusters,with the largest being“laparoscopic pancreaticoduodenectomy”.CONCLUSION The most influential studies predominantly originate from the United States,and there is growing interest in robotic surgery.Despite MIPD’s potential benefits,further research is required to address technical challenges and improve outcomes. 展开更多
关键词 minimally invasive pancreatoduodenectomy Laparoscopic surgery Robotic surgery Bibliometric analysis Citation analysis
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Geophysical data sparse reconstruction based on L0-norm minimization 被引量:6
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作者 陈国新 陈生昌 +1 位作者 王汉闯 张博 《Applied Geophysics》 SCIE CSCD 2013年第2期181-190,236,共11页
Missing data are a problem in geophysical surveys, and interpolation and reconstruction of missing data is part of the data processing and interpretation. Based on the sparseness of the geophysical data or the transfo... Missing data are a problem in geophysical surveys, and interpolation and reconstruction of missing data is part of the data processing and interpretation. Based on the sparseness of the geophysical data or the transform domain, we can improve the accuracy and stability of the reconstruction by transforming it to a sparse optimization problem. In this paper, we propose a mathematical model for the sparse reconstruction of data based on the LO-norm minimization. Furthermore, we discuss two types of the approximation algorithm for the LO- norm minimization according to the size and characteristics of the geophysical data: namely, the iteratively reweighted least-squares algorithm and the fast iterative hard thresholding algorithm. Theoretical and numerical analysis showed that applying the iteratively reweighted least-squares algorithm to the reconstruction of potential field data exploits its fast convergence rate, short calculation time, and high precision, whereas the fast iterative hard thresholding algorithm is more suitable for processing seismic data, moreover, its computational efficiency is better than that of the traditional iterative hard thresholding algorithm. 展开更多
关键词 Geophysical data sparse reconstruction LO-norm minimization iterativelyreweighted least squares fast iterative hard thresholding
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OPTIMAL PERFORMANCE OF THERMOELECTRIC REFRIGERATION SYSTEM USING ENTROPY GENERATION MINIMIZATION METHOD 被引量:2
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作者 曹业玲 夏文庆 余莉 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2005年第4期339-343,共5页
With the entropy generation minimization (EGM) method, the thermodynamical performance optimization in a thermoelectric refrigeration system is studied. The optimization is affected by the irreversibility of heat tr... With the entropy generation minimization (EGM) method, the thermodynamical performance optimization in a thermoelectric refrigeration system is studied. The optimization is affected by the irreversibility of heat transfer caused by finite temperature differences, the heat leak between external heat reservoirs and the internal dissipation of working fluids. EGM is taken as an objective function for the optimization. The objective function and design parameters are obtained. Optimal performance curves are presented by thermal and electronic parameters. Effects of these parameters on general and optimal performances are investigated. Results are helpful in determining optimal design conditions in real thermoelectric refrigeration systems. 展开更多
关键词 thermoelectric refrigeration system entropy generation minimization finite-time thermodynamics
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Thermodynamic analysis of combined reforming process using Gibbs energy minimization method: In view of solid carbon formation 被引量:5
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作者 Behzad Nematollahi Mehran Rezaei +1 位作者 Ebrahim Nemati Lay Majid Khajenoori 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2012年第6期694-702,共9页
Thermodynamic analysis was applied to study combined partial oxidation and carbon dioxide reforming of methane in view of carbon formation. The equilibrium calculations employing the Gibbs energy minimization were per... Thermodynamic analysis was applied to study combined partial oxidation and carbon dioxide reforming of methane in view of carbon formation. The equilibrium calculations employing the Gibbs energy minimization were performed upon wide ranges of pressure (1-25 atm), temperature (600-1300 K), carbon dioxide to methane ratio (0-2) and oxygen to methane ratio (0-1). The thermodynamic results were compared with the results obtained over a Ru supported catalyst. The results revealed that by increasing the reaction pressure methane conversion decreased. Also it was found that the atmospheric pressure is the preferable pressure for both dry reforming and partial oxidation of methane and increasing the temperature caused increases in both activity of carbon and conversion of methane. The results clearly showed that the addition of O2 to the feed mixture could lead to a reduction of carbon deposition. 展开更多
关键词 combined reforming carbon deposition chemical equilibrium Gibbs energy minimization method thermodynamic analysis
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Nonmonotone Adaptive Trust Region Algorithms with Indefinite Dogleg Path for Unconstrained Minimization 被引量:13
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作者 陈俊 孙文瑜 《Northeastern Mathematical Journal》 CSCD 2008年第1期19-30,共12页
In this paper, we combine the nonmonotone and adaptive techniques with trust region method for unconstrained minimization problems. We set a new ratio of the actual descent and predicted descent. Then, instead of the ... In this paper, we combine the nonmonotone and adaptive techniques with trust region method for unconstrained minimization problems. We set a new ratio of the actual descent and predicted descent. Then, instead of the monotone sequence, the nonmonotone sequence of function values are employed. With the adaptive technique, the radius of trust region △k can be adjusted automatically to improve the efficiency of trust region methods. By means of the Bunch-Parlett factorization, we construct a method with indefinite dogleg path for solving the trust region subproblem which can handle the indefinite approximate Hessian Bk. The convergence properties of the algorithm are established. Finally, detailed numerical results are reported to show that our algorithm is efficient. 展开更多
关键词 nonmonotone trust region method adaptive method indefinite dogleg path unconstrained minimization global convergence superlinear convergence
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Color Correction for Multi-view Video Using Energy Minimization of View Networks 被引量:4
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作者 Kenji Yamamoto Ryutaro Oi 《International Journal of Automation and computing》 EI 2008年第3期234-245,共12页
Systems using numerous cameras are emerging in many fields due to their ease of production and reduced cost, and one of the fields where they are expected to be used more actively in the near future is in image-based ... Systems using numerous cameras are emerging in many fields due to their ease of production and reduced cost, and one of the fields where they are expected to be used more actively in the near future is in image-based rendering (IBR). Color correction between views is necessary to use multi-view systems in IBR to make audiences feel comfortable when views are switched or when a free viewpoint video is displayed. Color correction usually involves two steps: the first is to adjust camera parameters such as gain, brightness, and aperture before capture, and the second is to modify captured videos through image processing. This paper deals with the latter, which does not need a color pattern board. The proposed method uses scale invariant feature transform (SIFT) to detect correspondences, treats RGB channels independently, calculates lookup tables with an energy-minimization approach, and corrects captured video with these tables. The experimental results reveal that this approach works well. 展开更多
关键词 MULTI-VIEW color correction image-based rendering (IBR) view networks (VNs) scale invariant feature transform (SIFT) energy minimization.
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Integral Global Minimization of Constrained Problems with Discontinuous Penalty Functions 被引量:1
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作者 吴斌 崔洪泉 郑权 《Journal of Shanghai University(English Edition)》 CAS 2005年第5期385-390,共6页
A class of discontinuous penalty functions was proposed to solve constrained minimization problems with the integral approach to global optimization, m-mean value and v-variance optimality conditions of a constrained ... A class of discontinuous penalty functions was proposed to solve constrained minimization problems with the integral approach to global optimization, m-mean value and v-variance optimality conditions of a constrained and penalized minimization problem were investigated. A nonsequential algorithm was proposed. Numerical examples were given to illustrate the effectiveness of the algorithm. 展开更多
关键词 integral global minimization constrained minimization problems discontinuous penalty functions.
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Waste Minimization Through Process Integration and Multi-objective Optimization 被引量:4
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作者 高瑛 石磊 姚平经 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2001年第3期267-272,共6页
By avoiding or reducing the production of waste, waste minimization is an effective approach to solve the pollution problem in chemical industry. Process integration supported by multi-objective optimization provides ... By avoiding or reducing the production of waste, waste minimization is an effective approach to solve the pollution problem in chemical industry. Process integration supported by multi-objective optimization provides a framework for process design or process retrofit by simultaneously optimizing on the aspects of environment and economics. Multi-objective genetic algorithm is applied in this area as the solution approach for the multi-objective optimization problem. 展开更多
关键词 waste minimization process integration multi-objective optimization multi-objective genetic algo- rithm
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Concave Minimization for Sparse Solutions of Absolute Value Equations 被引量:5
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作者 刘晓红 樊婕 李文娟 《Transactions of Tianjin University》 EI CAS 2016年第1期89-94,共6页
Based on concave function, the problem of finding the sparse solution of absolute value equations is relaxed to a concave programming, and its corresponding algorithm is proposed, whose main part is solving a series o... Based on concave function, the problem of finding the sparse solution of absolute value equations is relaxed to a concave programming, and its corresponding algorithm is proposed, whose main part is solving a series of linear programming. It is proved that a sparse solution can be found under the assumption that the connected matrixes have range space property(RSP). Numerical experiments are also conducted to verify the efficiency of the proposed algorithm. 展开更多
关键词 absolute value equations concave minimization SPARSITY linear programming range space property
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Minimization of Fuzzy Finite Generalized Automata 被引量:2
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作者 莫智文 胡红莉 《Journal of Electronic Science and Technology of China》 CAS 2006年第1期86-88,共3页
Some concepts in Fuzzy Generalized Automata (FGA) are established. Then an important new algorithm which would calculate the minimal FGA is given. The new algorithm is composed of two parts: the first is called E-r... Some concepts in Fuzzy Generalized Automata (FGA) are established. Then an important new algorithm which would calculate the minimal FGA is given. The new algorithm is composed of two parts: the first is called E-reduction which contracts equivalent states, and the second is called RE-reduction which removes retrievable states. Finally an example is given to illuminate the algorithm of minimization. 展开更多
关键词 fuzzy language fuzzy finite state automata Fuzzy Generalized Automata(FGA) minimal automata
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Delay Minimization for Intelligent Reflecting Surface Assisted Federated Learning 被引量:3
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作者 Ning Huang Tianshun Wang +3 位作者 Yuan Wu Suzhi Bi Liping Qian Bin Lin 《China Communications》 SCIE CSCD 2022年第4期216-229,共14页
Federated learning(FL), which allows multiple mobile devices to cooperatively train a machine learning model without sharing their data with the central server, has received widespread attention.However, the process o... Federated learning(FL), which allows multiple mobile devices to cooperatively train a machine learning model without sharing their data with the central server, has received widespread attention.However, the process of FL involves frequent communications between the server and mobile devices,which incurs a long latency. Intelligent reflecting surface(IRS) provides a promising technology to address this issue, thanks to its capacity to reconfigure the wireless propagation environment. In this paper, we exploit the advantage of IRS to reduce the latency of FL. Specifically, we formulate a latency minimization problem for the IRS assisted FL system, by optimizing the communication resource allocations including the devices’ transmit-powers, the uploading time, the downloading time, the multi-user decomposition matrix and the phase shift matrix of IRS. To solve this non-convex problem, we propose an efficient algorithm which is based on the Block Coordinate Descent(BCD) and the penalty difference of convex(DC) algorithm to compute the solution. Numerical results are provided to validate the efficiency of our proposed algorithm and demonstrate the benefit of deploying IRS for reducing the latency of FL. In particular, the results show that our algorithm can outperform the baseline of Majorization-Minimization(MM) algorithm with the fixed transmit-power by up to 30%. 展开更多
关键词 federated learning intelligent reflecting surface latency minimization
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Variance minimization for continuous-time Markov decision processes: two approaches 被引量:1
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作者 ZHU Quan-xin 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2010年第4期400-410,共11页
This paper studies the limit average variance criterion for continuous-time Markov decision processes in Polish spaces. Based on two approaches, this paper proves not only the existence of solutions to the variance mi... This paper studies the limit average variance criterion for continuous-time Markov decision processes in Polish spaces. Based on two approaches, this paper proves not only the existence of solutions to the variance minimization optimality equation and the existence of a variance minimal policy that is canonical, but also the existence of solutions to the two variance minimization optimality inequalities and the existence of a variance minimal policy which may not be canonical. An example is given to illustrate all of our conditions. 展开更多
关键词 Continuous-time Markov decision process Polish space variance minimization optimality equation optimality inequality.
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MARVEL:Multi-Agent Reinforcement Learning for VANET Delay Minimization 被引量:2
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作者 Chengyue Lu Zihan Wang +3 位作者 Wenbo Ding Gang Li Sicong Liu Ling Cheng 《China Communications》 SCIE CSCD 2021年第6期1-11,共11页
In urban Vehicular Ad hoc Networks(VANETs),high mobility of vehicular environment and frequently changed network topology call for a low delay end-to-end routing algorithm.In this paper,we propose a Multi-Agent Reinfo... In urban Vehicular Ad hoc Networks(VANETs),high mobility of vehicular environment and frequently changed network topology call for a low delay end-to-end routing algorithm.In this paper,we propose a Multi-Agent Reinforcement Learning(MARL)based decentralized routing scheme,where the inherent similarity between the routing problem in VANET and the MARL problem is exploited.The proposed routing scheme models the interaction between vehicles and the environment as a multi-agent problem in which each vehicle autonomously establishes the communication channel with a neighbor device regardless of the global information.Simulation performed in the 3GPP Manhattan mobility model demonstrates that our proposed decentralized routing algorithm achieves less than 45.8 ms average latency and high stability of 0.05%averaging failure rate with varying vehicle capacities. 展开更多
关键词 VANET multi-agent RL delay minimization routing algorithm
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Truncated sparse approximation property and truncated q-norm minimization 被引量:1
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作者 CHEN Wen-gu LI Peng 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2019年第3期261-283,共23页
This paper considers approximately sparse signal and low-rank matrix’s recovery via truncated norm minimization minx∥xT∥q and minX∥XT∥Sq from noisy measurements.We first introduce truncated sparse approximation p... This paper considers approximately sparse signal and low-rank matrix’s recovery via truncated norm minimization minx∥xT∥q and minX∥XT∥Sq from noisy measurements.We first introduce truncated sparse approximation property,a more general robust null space property,and establish the stable recovery of signals and matrices under the truncated sparse approximation property.We also explore the relationship between the restricted isometry property and truncated sparse approximation property.And we also prove that if a measurement matrix A or linear map A satisfies truncated sparse approximation property of order k,then the first inequality in restricted isometry property of order k and of order 2k can hold for certain different constantsδk andδ2k,respectively.Last,we show that ifδs(k+|T^c|)<√(s-1)/s for some s≥4/3,then measurement matrix A and linear map A satisfy truncated sparse approximation property of order k.It should be pointed out that when Tc=Ф,our conclusion implies that sparse approximation property of order k is weaker than restricted isometry property of order sk. 展开更多
关键词 TRUNCATED NORM minimization TRUNCATED SPARSE approximation PROPERTY restricted isometry PROPERTY SPARSE signal RECOVERY low-rank matrix RECOVERY Dantzig selector
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