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Two-Level Linear Relaxation Method for Generalized Linear Fractional Programming

Journal of the Operations research Society of China 2023年第3期11卷 569-594页

作者： Hong-Wei Jiao You-Lin Shang Postdoctoral Research Base Henan Institute of Science and TechnologyXinxiang453003HenanChina Postdoctoral Research Station of Control Science and Engineering Henan University of Science and TechnologyLuoyang471023HenanChina

This paper presents an efficient algorithm for globally solving a generalized linear fractional programming *** establishing this algorithm,we firstly construct a two-level linear relaxation method,and by utilizing the method,we can convert the initial generalized linear fractional programming problem and its subproblems into a series of linear programming relaxation *** on the branch-and-bound framework and linear programming relaxation problems,a branch-and-bound algorithm is presented for globally solving the generalized linear fractional programming problem,and the computational complexity of the algorithm is ***,numerical experimental results demonstrate the feasibility and efficiency of the proposed algorithm.

关键词： Generalized linear fractional programming Global optimization Two-level linear relaxation method Branch-and-bound

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The Constituent-Dependent Translocation Mechanism for PM_(2.5) to Travel through the Olfactory Pathway

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Environment & Health 2024年第12期2卷 856-864页

作者： Sheng Wei Ting Xu Miao Cao Huan Wang Yiqun Song Daqiang Yin Key Laboratory of Yangtze River Water Environment Ministry of EducationCollege of Environmental Science and EngineeringTongji UniversityShanghai 200092China Postdoctoral Research Station of Environmental Science and Engineering Tongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

The neurotoxic risk of PM_(2.5) is of worldwide concern,but the pathways through which PM_(2.5) gets to the central nervous system are still under *** olfactory pathway provides a promising shortcut to the brain,which bypasses the blood-brain barrier for PM_(2.5).However,direct evidence is lacking,and the translocation mechanism is still *** study used the primary murine olfactory sensory neurons(OSNs)as an in vitro model to explore the translocation mechanism of PM_(2.5) in the olfactory *** found that PM_(2.5) can be internalized into the OSNs via vesicle *** process responds only to the water-insoluble compositions of PM_(2.5)(WIS-PM_(2.5))and cannot be affected by the water-soluble compositions of PM_(2.5)(WS-PM_(2.5)).PM_(2.5) can further disrupt the integrity of the barrier constituted by the OSNs,and WS-PM_(2.5) plays a heightened role in inducing the *** results suggested that both cellular and paracellular pathways are possibly involved in the translocation of PM_(2.5) in the olfactory *** advanced microscopy techniques need to be developed to explore the whole translocation process in the olfactory-brain pathway in both in vitro and in vivo models.

关键词： particulate matter olfactory system central nervous system endocytosis vesicle transportation

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Experiment research of the Electromagnetic Immunity Performance of the Electronic Current Transformer Card under Extreme Temperature

Experiment Research of the Electromagnetic Immunity Performa...

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2022 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2022

作者： Liu, Guanchen Ming, Guangqiang Yue, Xuhui Yuan, Jianping Yang, Junjie Gao, Weizhong Powerchina Huadong Engineering Corporation Ltd. Zhejiang University Postdoctoral Research Station Hangzhou China Postdoctoral Research Station Powerchina Huadong Engineering Corporation Ltd. Hangzhou China Hangzhou Huachen Electric Power Control Co. Ltd. Powerchina Huadong Engineering Corporation Ltd. Hangzhou China

ISBN: (数字)9781665492065

ISBN: (纸本)9781665492065

With the increasing voltage level of the smart grid, the electromagnetic environment of substation is getting more complex. The electronic devices placed on the high voltage side often impacted by the severe electromagnetic interference (EMI). In the northeastern or southern China, the secondary electronic devices in substation could withstand harsh natural temperature. The international standards of electromagnetic compatibility (EMC) and environmental reliability are tested separately, without considering their comprehension affect. However, the simulation of the electronic current transformer acquisition card in the actual working conditions is not sufficient. In this work, the electromagnetic immunity of the electronic current transformer card under extreme temperature studied, and the influence mechanism is analyzed. © 2022 IEEE.

关键词： Smart power grids

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Revealing the intrinsic mechanisms for accelerating nitrogen removal efficiency in the Anammox reactor by adding Fe(Ⅱ)at low temperature

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Chinese Chemical Letters 2024年第8期35卷 341-348页

作者： Linjing Li Wenlai Xu Jianyong Ning Yaping Zhong Chuyue Zhang Jiane Zuo Zhicheng Pan State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China National Postdoctoral Research Station Haitian Water GroupChengdu 610213China National Enterprise Technology Center Haitian Water GroupChengdu 610213China Water Safety and Water Pollution Control Engineering Technology Research Center in Sichuan Province Chengdu 610213China Laboratory of Municipal Wastewater Treatment Technology in Sichuan Province Chengdu 610213China Institute of Environment and Ecology Tsinghua Shenzhen International Graduate SchoolShenzhen 518055China

Fe(Ⅱ)is an essential trace element for anaerobic ammonium oxidation bacteria(AAOB)metabolism,and can improve the nitrogen removal efficiency of anaerobic ammonia oxidation(Anammox).Here we oper-ated two identical expanded granular sludge bed(EGSB)reactors at low temperature(15±3℃)for 154 *** 1(R_(1))received additional Fe(Ⅱ)(0.12 mmol/L)during the late startup phase,while reactor 0(R_(0))served as the control and did not receive extra Fe(Ⅱ).Nitrogen removal in R_(1)became stable at 55 d of operation,ten days earlier than R_(0).The nitrogen removal rate(NRR)of R_(1) was 1.64 kg N m^(−3)d^(−1)and its TN removal rate was as high as 89%,while R_(0)only reached 75%.The addition of Fe(Ⅱ)was fur-ther beneficial to aggregation and stability of the granular sludge,and the used sludge of both reactors showed enrichment for AAOB populations compared to the inoculum,for instance,increased abundance of Candidatus-Kuenenia and in particular of Candidatus-Brocadia(from 0.17%to 10.10%in R_(0)and 7.79%in R_(1)).Diverse microbial species and complex microbial network structure in R_(1)compared to R_(0)promoted the coupled denitrogenation by Anammox,dissimilatory nitrate reduction to ammonium(DNRA),nitrate-dependent Fe oxidation(NDFO),and ferric ammonium oxidation(Feammox).In addition,the microbial community in R_(1)was more resistant to short-term low temperature(2-7℃)starvation,illustrating a further positive effect of adding Fe(Ⅱ)during the startup phase of an Anammox reactor.

关键词： Ambient low temperature Anammox Fe(Ⅱ) Extracellular polymeric substances Microbial community Microbial network analysis

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Electromagnetic Protection Optimization of the Intelligent Electronic Devices Based on the Passive EMI Filter Design 5

Electromagnetic Protection Optimization of the Intelligent E...

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5th IEEE Conference on Energy Internet and Energy System Integration, EI2 2021

作者： Liu, Guanchen Zhang, Jintao Yuan, Jianping Yang, Junjie Gao, Weizhong Yang, Qiang Postdoctoral Research Station Cocultured by Zhejiang University Powerchina Huadong Engineering Corporation Ltd. Hangzhou China Hangzhou Huachen Electric Power Control Co. Ltd. Powerchina Huadong Engineering Corporation Ltd. Hangzhou China College of Electrical Engineering Zhejiang University Hangzhou China

ISBN: (纸本)9781665434256

Passive EMI filter is an effective way to suppress high-frequency electromagnetic interference(EMI). This work takes the electronic current transformer acquisition card as the research prototype. In order to suppress the electrical fast transient/burst (EFT7B) applied at the signal input port of the acquisition card, this work proposed an optimal index to design a specific topology of the filter. Based on the high-frequency EFT7B, the optimal parameters of the EMI filter are calculated by applying nonlinear programming theory, and the designed EMI filter is verified through experiments. © 2021 IEEE

关键词： Signal interference

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Alleviating effects and mechanisms of action of large-leaf yellow tea drinking on diabetes and diabetic nephropathy in mice

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Food Science and Human Wellness 2023年第5期12卷 1660-1673页

作者： Guangshan Zhao Jianyuan Teng Ruixia Dong Qiuyan Ban Lian Yang Kang Du Yifei Wang Hanlin Pu Chung S.Yang Zhe Ren Innovation Team of Food Nutrition and Safety Control College of Food Science&TechnologyHenan Agricultural UniversityZhengzhou 450002China Biology Postdoctoral Research Station Department of Cell BiologyCollege of Life Science and TechnologyJinan UniversityGuangzhou 510632China College of Horticulture Jinling Institute of TechnologyNanjing 211169China Department of Forestry and Technology Lishui Vocational and Technical CollegeLishui 323000China Department of Tea Science College of HorticultureHenan Agricultural UniversityZhengzhou 450002China Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System School of PharmacyGuangdong Pharmaceutical UniversityGuangzhou 510006China Department of Chemical Biology Ernest Mario School of PharmacyRutgersThe State University of New JerseyPiscataway 08901USA International Joint Research Laboratory of Tea Chemistry and Health Effects Anhui Agricultural UniversityHefei 230036China

Our previous study found that large-leaf yellow tea(LYT)had interesting hypoglycemic activity in high-fat diet-induced obese mice and highly safety in healthy mice. To study the anti-diabetic potential of LYT, the present study further investigated the preventive effects and mechanisms of action of LYT administration on diabetes and diabetic nephropathy in high-fat diet plus streptozotocin-induced diabetic mice. Results showed that LYT infusions(1/100 and 1/50, m/V)as drinking fluid for 4 weeks reduced diabetic polydipsia and polyuria, enhanced glucose tolerance and insulin sensitivity, and lowered fasting blood glucose level. The underlying mechanisms involve downregulation of gluconeogenesis(lower protein levels of TXNIP and FBP and enzyme activity of FBP), upregulation of lipid catabolism(higher protein levels of CPT-1α and PPARα), downregulation of lipogenesis(lower protein level of SREBP-1), and modification of the structure and abundance of gut microbiota to modulate metabolic homeostasis. Moreover, LYT administration prevented diabetic nephropathy, possibly due to reduced glucose-caused osmotic diuresis and lowered levels of renal PKC-β2, NLRP3 as well as membrane PKC-α, AQP2 and glycosylated AQP2 proteins. Taken together, LYT exhibits the activities in alleviating diabetic symptoms, ameliorating glucose and lipid dysmetabolism and fatty liver, and preventing diabetic nephropathy in diabetic mice. These activities may be explored for the prevention and treatment of diabetes in humans.

关键词： Diabetes Glucose and lipid metabolism Gut microbiota Diabetic nephropathy Large-leaf yellow tea

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A Method for Recognition of Mixed Gas Composition Based on PCA and KNN 19

A Method for Recognition of Mixed Gas Composition Based on P...

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19th International Conference on Optical Communications and Networks, ICOCN 2021

作者： Xia, Wanyu Song, Tingting Yan, Zhanwei Song, Kai Chen, Deyun Chen, Yinsheng National Experimental Teaching Demonstration Center for Measurement and Control Technology and Instrumentation Harbin University of Science and Technology Harbin150080 China Postdoctoral Research Station of Computer Science and Technology Harbin University of Science and Technology Harbin150080 China School of Electrical Engineering and Automation Harbin Institute of Technology Harbin150080 China

ISBN: (纸本)9781665424462

In the mining process of coal, oil, and natural gas, there are often a large number of toxic, hazardous and explosive gases, which pose a greater safety hazard. These gases usually exist in the form of mixtures. Accurately identifying the composition of the mixed gas is of great significance to the prevention of safety accidents. In order to improve the accuracy of the component recognition of the mixed gas, this paper proposes a mixed gas component recognition algorithm based on the combination of principal component analysis (PCA) and k-nearest neighbor algorithm (KNN). PCA is used to extract the characteristics of the sensor array signal to obtain the characteristic value of the gas, and then KNN is used to realize the recognition of the gas type. The results show that the recognition rate of the feature quantity after dimensionality reduction as input is higher than that before dimensionality reduction. Finally, PCA and KNN algorithm and PCA and support vector machine (SVM) algorithm are compared for the recognition rate of mixed gas. Experimental results show that the proposed method has a recognition rate of 96.88% for mixed gas components. © 2021 IEEE.

关键词： Support vector machines

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A Gas Recognition Method Based on PCA and PSO-LSSVM 19

A Gas Recognition Method Based on PCA and PSO-LSSVM

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19th International Conference on Optical Communications and Networks, ICOCN 2021

作者： Song, Tingting Xia, Wanyu Yan, Zhanwei Song, Kai Chen, Deyun Chen, Yinsheng National Experimental Teaching Demonstration Center for Measurement and Control Technology and Instrumentation Harbin University of Science and Technology Harbin150080 China Postdoctoral Research Station of Computer Science and Technology Harbin University of Science and Technology Harbin150080 China School of Electrical Engineering and Automation Harbin Institute of Technology Harbin150080 China

ISBN: (纸本)9781665424462

Gases in the real environment always exist in the form of mixtures, and effective identification of gas types to reduce the occurrence of safety incidents has become an important direction in the field of gas analysis research. This paper proposes a mixed gas identification method based on PCA and PSO-LSSVM. This method uses principal component analysis (PCA) to reduce the dimensionality of the sensor array output signal, and uses the Relief algorithm to select data. The particle swarm algorithm is used to iteratively optimize the relevant parameters in the least squares support vector machine model, and the PSO-LSSVM model is constructed to qualitatively analyze the composition of the mixed gas. This article uses a public data set of mixed gases of ethylene, methane and carbon monoxide to conduct experiments. The experimental results show that the method used in this paper can effectively identify the type of mixed gas, and the recognition accuracy rate reaches 91.67%. The method proposed in this paper can provide a research foundation for the follow-up analysis of the mixed gas concentration. © 2021 IEEE.

关键词： Particle swarm optimization (PSO)

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Electromagnetic Protection Optimization of the Intelligent Electronic Devices Based on the Passive EMI Filter Design

Electromagnetic Protection Optimization of the Intelligent E...

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IEEE Conference on Energy Internet and Energy System Integration (EI2)

作者： Guanchen Liu Jintao Zhang Jianping Yuan Junjie Yang Weizhong Gao Qiang Yang Postdoctoral Research Station Cocultured by Zhejiang University and Powerchina Huadong Engineering Corporation Ltd. Hangzhou China Hangzhou Huachen Electric Power Control Co. Ltd. Powerchina Huadong Engineering Corporation Ltd. Hangzhou China College of Electrical Engineering Zhejiang University Hangzhou China

ISBN: (纸本)9781665434263

Passive EMI filter is an effective way to suppress high-frequency electromagnetic interference(EMI). This work takes the electronic current transformer acquisition card as the research prototype. In order to suppress the electrical fast transient/burst (EFT/B) applied at the signal input port of the acquisition card, this work proposed an optimal index to design a specific topology of the filter. Based on the high-frequency EFT/B, the optimal parameters of the EMI filter are calculated by applying nonlinear programming theory, and the designed EMI filter is verified through experiments.

关键词： Passive filters Electromagnetic interference Prototypes System integration Programming Information filters Filtering theory

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research on wire rope wear detection based on computer vision

Research on wire rope wear detection based on computer visio...

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3rd Asian Conference on Artificial Intelligence Technology, ACAIT 2019

作者： Shi, Hengliang Zheng, Lintao Sun, Shibao Zhang, Lei Wang, Lei Postdoctoral Station of Control Science and Engineering of Henan University of Science and Technology Kaiyuan Avenue 263# Luoyang China Computer Department School of Information Engineering Henan University of Science and Technology Kaiyuan Avenue 263 Luoyang China Safety Testing Center Luoyang Branch of Henan Research Institute of Safety Testing for Special Equipment Wangcheng Avenue 40# Luoyang China

In lifting equipment, the quality of wire rope is directly related to production safety. In this study, infrared image of wire rope is captured by industrial camera, and the background modelling method based on location binary pattern is proposed to extract foreground of moving wire rope. Then the outline of wire rope is extracted by Canny edge detection, and the diameter of wire rope is corrected by one-dimensional measuring method and direction fitting. Experiments show that this method can accurately extract the moving wire rope and can detect the diameter of the wire rope and locate abrasion. © 2020 Institution of engineering and Technology. All rights reserved.

关键词： Computer vision

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