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Distributed Region Tracking and Perimeter Surveillance for Second-Order Multi-Agent Systems in Star-Shaped Sets

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Journal of Systems Science & Complexity 2024年第5期37卷 1995-2020页

作者： SHANG Juan MO Lipo MI Rongxin CAO Xianbing school of Mathematics and Statistics Beijing Technology and Business University The Department of Foundation Shijiazhuang Institute of Railway Technology school of Computer and Artificial Intelligence Beijing Technology and Business University Research Centre for Agri-Product Quality Traceability Beijing Technology and Business University Coordination Center of China National Computer Network Emergency Response Technical Team

This paper investigates region tracking and perimeter surveillance of second-order multi-agent systems, where all agents move within a star-shaped set. First, by coordination transformations,the region tracking problem is converted from the star-shaped sets to a circular region. The authors employ communication and collaboration to complete region tracking and perimeter surveillance tasks,and then revert back to the star-shaped set by using inverse transformations. Second, the authors propose a distributed control strategy based on attractive and interaction potential functions, under which all agents can quickly track a given circular region and move around the perimeter. Finally,the authors validate the effectiveness and performance advantages of the proposed method through simulation experiments.

关键词： Distributed control multi-agent systems star-shaped sets target tracking

Kinematic calibration under the expectation maximization framework for exoskeletal inertial motion capture system

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Journal of Systems Engineering and Electronics 2024年第3期35卷 769-779页

作者： QIN Weiwei GUO Wenxin HU Chen LIU Gang SONG Tainian school of Nuclear Engineering Rocket Force University of EngineeringXi’an 710025China

This study presents a kinematic calibration method for exoskeletal inertial motion capture (EI-MoCap) system with considering the random colored noise such as gyroscopic *** this method, the geometric parameters are calibrated by the traditional calibration method at first. Then, in order to calibrate the parameters affected by the random colored noise, the expectation maximization (EM) algorithm is introduced. Through the use of geometric parameters calibrated by the traditional calibration method, the iterations under the EM framework are decreased and the efficiency of the proposed method on embedded system is improved. The performance of the proposed kinematic calibration method is compared to the traditional calibration method. Furthermore, the feasibility of the proposed method is verified on the EI-MoCap system. The simulation and experiment demonstrate that the motion capture precision is significantly improved by 16.79%and 7.16%respectively in comparison to the traditional calibration method.

关键词： human motion capture kinematic calibration exoskeleton gyroscopic drift expectation maximization(EM)

Commentary on "Association of daily sitting time and leisure-time physical activity with body fat among ***"

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Journal of Sport and Health Science 2024年第2期13卷 127-129页

作者： Barbara E.Ainsworth school of Exercise and Health Shanghai University of SportShanghai 200438China

In their study,association of daily sitting time and leisure-time physical activity (LTPA) with body fat among ***,Liao et al.^(1) analyzed data from the 2011-2018 National Health and Examination Survey to examine associations between h/day sitting,meeting (or not meeting) the *** Activity Guidelines of≥150 min/week of moderate-and vigorous-intensity LTPA,and combinations of sitting time and LTPA on totaland trunk percent body fat (BF%).

关键词： U.S. adult among

Performance Design of High-Temperature Chloride Salts as Thermal Energy Storage Material

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Journal of Thermal Science 2024年第2期33卷 479-490页

作者： ZHAO Le WANG Jingyao CUI Liu LI Baorang DU Xiaoze WU Hongwei Key Laboratory of Power Station Energy Transfer Conversion and System(North China Electric Power university) Ministry of EducationBeijing102206China school of Energy and Power Engineering Lanzhou University of TechnologyLanzhou730050China school of Physics Engineering and Computer ScienceUniversity of HertfordshireHatfieldAL109ABUK

The chloride salts have great potential used as high-temperature thermal energy storage(TES) medium for the concentrated solar power *** this study,LiCl,KCl and CaCl_(2) were selected as energy storage materials in order to further broaden the working temperature of ternary chloride salt and improve its energy storage *** new high-temperature energy storage ternary chloride composed of LiCl,KCl,and CaCl_(2) was developed based on the phase diagram generated by *** components of LiCl-KCl-CaCl_(2) with the mass ratio of 37.85%-53.38%-8.77%,30.90%-13.82%-55.28% and 1.78%-18.61%-79.61% were developed,of which the corresponding melting temperature(T_(m)) 340.93,433.57 and 626.85℃,respectively,was obtained *** that T_(m) of the third group of salts was too high,only the first two groups of salts were *** test showed that the actual melting point was only 0.46% and 1.64% different from the melting point predicted by *** thermal properties of the two ternary chloride salts were also *** solid and liquid-specific heat of ternary salts was determined by DSC using sapphire as the standard *** vapor pressure and decomposition temperature of ternary chloride salts were *** results showed that the vapor pressure of salt 1 was almost constant below 650℃ by ***,the TG results showed that the upper working temperature of salt 1 was 650℃ under the air *** addition,the ternary chloride salts after short-term cycling still exhibited excellent thermal properties,which revealed that these good thermal properties make them have broad application prospects in high-temperature thermal energy storage systems.

关键词： chloride salts thermal energy storages thermal properties thermal stability

Economic Evaluation for 5G Planning of a Distribution Network Considering Network Coupling and Important Node Identification

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Protection and Control of Modern Power Systems 2024年第3期9卷 126-141页

作者： Xiaowei Wang Qiankun Kang Liang Guo Fan Zhang Zhenfeng Liang Jie Gao Xue Wang Weibo Liu IEEE the school of Electrical Engineering Xi’an University of TechnologyXi’an 710054China Xi’an university of Technology China Zhejiang university HangzhouChina the school of Electrical Engineering Xi’an Jiaotong UniversityXi’anChina the Xi’an Jiaotong university China

The rapid development of communication services in the power distribution network poses challenges for existing wireless communications,and the deployment of a fiber optic network is costly and *** emerging 5G technology has been piloted in power distribution networks,though the cost-effectiveness of its large-scale deployment remains *** paper proposes an economic evaluation method for 5G planning in power distribution networks,considering the coupling relationship between power distribution and communication networks and the identification of important network ***,the objective function to solve the planned number of 5G base stations is *** is solved using the adaptive particle swarm algorithm and K-means ***,the coupling relationship between the distribution and communication networks is discussed and *** node importance of the coupling network is analyzed to identify the important nodes,and micro base stations or optical fibers are added to improve the reliability of the distribution network at the communication ***,an economic evaluation index of 5G planning of the distribution network is *** paper compares the economic solutions of 5G and 4G communications in city and town scenarios using the IEEE 123-node network as an example,and concludes that the economics of 5G are better than those of 4G.

关键词： 5G coupling relationship node im-portance economic evaluation adaptive particle swarm K-means

Utilization of hydralazine as a reactive matrix for enhanced detection and on-MALDI-target derivatization of saccharides

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Chinese Chemical Letters 2024年第5期35卷 386-391页

作者： Dan Ouyang Huan Huang Yanting He Jiajing Chen Jiali Lin Zhuling Chen Zongwei Cai Zian Lin Ministry of Education Key Laboratory of Analytical Science for Food Safety and Biology Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food SafetyCollege of ChemistryFuzhou UniversityFuzhou 350108China school of Pharmacy Bengbu Medical UniversityBengbu 233000China Partner State Key Laboratory of Environmental and Biological Analysis Department of ChemistryHong Kong Baptist UniversityHong KongChina

Saccharides are a sort of ubiquitous and vital molecules within the whole ***,the application of saccharides analysis with matrix-assisted laser desorption/ionization mass spectrometry(MALDI-MS)is restricted by their low ionization efficiency and the instability of the sialic acid *** strategy based on nonreductive amination provides a good solution,however,this is often time consuming and may result in sample loss due to removal of excessive derivatization ***,hydralazine(HZN)was utilized as a reactive matrix for labeling reducing saccharides directly on MALDI target which eliminated tedious sample preparation and avoided sample *** optimization,effective and reproducible on-MALDI-target derivatization of neutral and acidic saccharides was achieved in both positive and negative *** with 2,5-dihydroxybenzoic acid(DHB)and 9-aminoacridine(9-AA),HZN improved the detection sensitivity of reducing saccharides and provided more abundant fragment ions in MS/MS ***,26 kinds of neutral glycans and 5 kinds of sialic glycans were identified from ovalbumin(OVA)and bovine fetuin,*** with the statistical models,this strategy could be used to distinguish and predict samples of 6 brands of beer,and discriminate 2 kinds of beer fermentation *** addition,HZN was applied for quantitative analysis of glucose in urine samples,and the obtained urine glucose concentrations of diabetic patients were consistent with the clinical test results,showing the potential of qualitative and quantitative analysis of reducing saccharides in complex samples.

关键词： Hydralazine Reactive matrix On-MALDI-target derivatization Saccharides

miR-557 suppresses hepatocellular carcinoma cell proliferation and migration via downregulating CBX4

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BIOCELL 2024年第7期48卷 1071-1079页

作者： XULONG SUN WENTAO DING CHAO JIANG ZHIAN FANG Department of Orthopedics Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai200080China Department of General Surgery Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai200080China Department of Thoracic Surgery Shanghai Chest HospitalShanghai Jiao Tong University School of MedicineShanghai200030China Department of Radiology Zhongda HospitalSoutheast University School of MedicineNanjing210009China

Introduction:Hepatocellular carcinoma(HCC),a prevalent malignancy,poses signiﬁcant challenges with high tumor heterogeneity and poor ***(miRNAs)play a pivotal role in *** abnormalities in microRNA-557(miR-557)expression have been implicated in various cancer types,its role in HCC remains ***,there is a need to explore the function of microRNA-557 in ***:Candidate miRNAs were identiﬁed through screening in GSE108724 and ***-time PCR was employed to analyze the expression level of miR-557 in hepatoma cell lines and *** viability and migration assays were applied to assess the impact of miR-557 on HCC cell ***,the miR-557 target was predicted through three algorithms(Targetscan,miRWalk,and miRanda),and this was conﬁrmed through luciferase assay and Western ***:In this study,miR-557 was identiﬁed in two datasets and expressed at a low level in both hepatoma cell lines and ***,high expression of miR-557 in HCC cells inhibited ***,low expression of miR-557 enhanced tumor proliferation and *** chromobox 4(CBX4)was identiﬁed as a direct target of *** CBX4 inﬂuenced the functional impact of miR-557 on HCC cell ***:Taken together,our study contributed to elucidating the hepatoma molecular heterogeneity and provided novel insights into miR-557 role and its target CBX4 in HCC,suggesting its potential as a future effectively druggable target for HCC intervention.

关键词： Hepatocellular carcinoma miR-557 Chromobox 4 Hepatocarcinogenesis

Phosphotungstic acid ionic liquid for efficient photocatalytic desulfurization:Synthesis,application and mechanism

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Chinese Journal of Chemical Engineering 2024年第5期69卷 101-111页

作者： Chenchao Hu Suhang Xun Desheng Liu Junjie Zhang Minqiang He Wei Jiang Huaming Li Wenshuai Zhu Institute of Environmental Health and Ecological Security School of Environment and Safety EngineeringJiangsu UniversityZhenjiang 212013China school of Chemistry and Chemical Engineering Institute for Energy ResearchJiangsu UniversityZhenjiang 212013China Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment Suzhou University of Science and TechnologySuzhou 215009China

An efficient mass transfer process is a critical factor for regulating catalytic activity in a photocatalytic desulfurization ***,a phosphotungstic acid(HPW)active center is successfully composited with a quaternary ammonium phosphotungstate-based hexadecyltrimethylammonium chloride ionic liquid(CTAC-HPW)by the ion exchange method for the photocatalytic oxidative desulfurization of dibenzothiophene *** keggin structure of HPW and highly mass transfer performance of organic cations synergistically enhanced the photocatalytic activity towards the effective convertion of dibenzothiophene(DBT)with the excitation of visible *** deep desulfurization(<10 mg·kg^(-1))is attained within 30 min,and well stability is demonstrated within 25 ***,the CTAC-HPW photocatalyst projects well selectivity to interference from coexisting compounds such as olefins and aromatic hydrocarbons and universality of dibenzothiophenes,for example,4-methyldibenzothiophene(4-MDBT)and 4,6-dimethyldibenzothiophene(4,6-DMDBT).Ultimately,a possible photocatalytic desulfurization mechanism is proposed according to the Gaschromatography-mass spectrometry(GC-MS),proving that the final product is the corresponding *** trapping experiment and electron spin resonance(ESR)analysis confirmed that h^(+)and,COOH played critical roles in the oxidation *** work offers a practicable strategy for efficiently converting DBT to DBTO_(2) with added value.

关键词： Photocatalytic desulfurization Extraction Ionic liquid CTAC-HPW

New insight into targeting the DNA damage response in the treatment of glioblastoma

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Chinese Journal of Natural Medicines 2024年第10期22卷 869-886页

作者： ZHEN Tengfei SUN Tianyu XIONG Baichen LIU Hui WANG Lei CHEN Yao SUN Haopeng school of Pharmacy China Pharmaceutical University Department of Chemistry Tsinghua University school of Pharmacy Nanjing University of Chinese Medicine

Glioblastoma(GBM) is the most common invasive malignant tumor in human brain tumors, representing the most severe grade of gliomas. Despite existing therapeutic approaches, patient prognosis remains dismal, necessitating the exploration of novel strategies to enhance treatment efficacy and extend survival. Due to the restrictive nature of the blood-brain barrier(BBB), smallmolecule inhibitors are prioritized in the treatment of central nervous system tumors. Among these, DNA damage response(DDR) inhibitors have garnered significant attention due to their potent therapeutic potential across various malignancies. This review provides a detailed analysis of DDR pathways as therapeutic targets in GBM, summarizes recent advancements, therapeutic strategies, and ongoing clinical trials, and offers perspectives on future directions in this rapidly evolving field. The goal is to present a comprehensive outlook on the potential of DDR inhibitors in improving GBM management and outcomes.

关键词： DNA damage response Glioblastoma Small molecule inhibitors