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[Solid-phase extraction coupled with high performance liquid chromatography-triple quadrupole mass spectrometry for simultaneous determination of seven coumarins in water samples from drinking water treatment plants]

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Se pu = Chinese journal of chromatography 2025年第1期43卷 78-86页

作者： Wen-mei Jiao Jing-Ming Yang Ce Xu Fu-Kang Gao lu-Yao Shen Yu-Bo Yuan Zhi-Fen Guo Guang Huang School of Life Sciences and Chemical Engineering Jiangsu Second Normal University Nanjing 211200 China. School of Stomatology Nanjing Medical University Nanjing 210029 China. School of Public Health Nanjing Medical University Nanjing 211166 China. Key Laboratory of Modern Toxicology Ministry of Education School of Public Health Nanjing Medical University Nanjing 211166 China.

Chlorinated coumarins, which are as cytotoxic as highly toxic halobenzoquinones toward CHO-K1 cells, have recently been identified as disinfection byproducts in drinking water disinfection processes. Therefore, detecting coumarins in water samples collected at various stages from drinking water treatment plants helps assess the formation of chlorinated coumarins in drinking water. Hence, a simple, rapid, accurate, and sensitive method for quantifying coumarins in water samples is required. In this study, a method was developed based on solid-phase extraction coupled with high performance liquid chromatography-triple-quadrupole mass spectrometry for analyzing seven coumarins in water samples from drinking water treatment plants, including 6,7-dihydroxycoumarin, 7-hydroxycoumarin, 6-hydroxy-4-methylcoumarin, 8-chloro-7-hydroxycoumarin, coumarin, 7-chloro-6-hydroxy-4-methylcoumarin, and 3,8-dichloro-7-hydroxycoumarin. Sample pretreatment involved solid-phase extraction using HLB columns, followed by elution with water and methanol, each containing 0.25% formic acid. The extracted solution was separated via gradient elution using a Phenomenex luna C18 column (100 mm×2.0 mm, 3 mm) with 0.1% formic acid aqueous solution and methanol as the mobile phases, with analytes detected by triple-quadrupole mass spectrometry equipped with electrospray ionization source in multiple reaction monitoring mode. The matrix effect, precision, and accuracy of the developed method were investigated using raw and treated water as matrices. Matrix effects of 0.84-1.12 were recorded for the detection of 6,7-dihydroxycoumarin, 7-hydroxycoumarin, 6-hydroxy-4-methylcoumarin, and coumarin in raw water, while values of 0.67-0.70 were recorded for 8-chloro-7-hydroxycoumarin, 7-chloro-6-hydroxy-4-methylcoumarin, and 3,8-dichloro-7-hydroxycoumarin in finished water. The three chlorinated coumarins exhibited matrix effects above 0.80 after the finished water matrix had been diluted four times. These re

关键词： coumarins disinfection byproducts drinking water high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) solid-phase extraction (SPE)

Unifying logic rules and machine learning for entity enhancing

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Science China(Information Sciences) 2020年第7期63卷 142-160页

作者： Wenfei FAN ping lu Chao TIAN School of Informatics University of Edinburgh Shenzhen Institute of Computing Sciences Shenzhen University Beijing Advanced Innovation Center for Big Data and Brain Computing Beihang University Alibaba Group

This paper proposes a notion of entity enhancing, which unifies entity resolution and conflict resolution, to identify tuples that refer to the same real-world entity and at the same time, correct semantic inconsistencies. We propose to unify rule-based and machine learning(ML) methods for entity enhancing, by embedding ML classifiers as predicates in logic rules. We model entity enhancing by extending the chase. We show that the chase warrants correctness justification and the Church-Rosser property. Moreover, we settle fundamental problems associated with entity enhancing, including the enhancing, consistency, satisfiability,and implication problems, ranging from NP-complete and coNP-complete to Π~p-complete. Taken together,these provide a new theoretical framework for unifying entity resolution and conflict resolution.

关键词： logic rules machine learning entity enhancing entity resolution conflict resolution

Study on carbon emission calculation method and carbon reduction indexes of urban building stock

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Science China(Technological Sciences) 2024年第9期67卷 2706-2726页

作者： YANG Liu ZHANG Nan lu mei luO ZhiXing DOU mei State Key Laboratory of Green Building Xi’an University of Architecture and TechnologyXi’an 710055China School of Architecture Xi’an University of Architecture and TechnologyXi’an 710055China School of Language Literature and LawXi’an University of Architecture and TechnologyXi’an 710055China School of Management Xi’an University of Architecture and TechnologyXi’an 710055China China Southwest Architectural Design and Research Institute Corp.Ltd. Chengdu 610041China

Carbon emissions associated with buildings are a major source of urban emissions. To put forward the methods and strategies to curb carbon emissions from urban building stock, it is not only necessary to establish a carbon emission calculation method for fine statistical analysis, but also to evaluate carbon emissions of urban planning schemes with applicable indexes. Currently,researches mainly focus on carbon emissions of individual buildings. When expanded to urban building stock, the calculation faces the lack of basic data, inadequate spatial analysis and unspecific carbon reduction indexes. Therefore, this study proposes a bottom-up calculation method for urban building stock, conducts spatial analysis based on carbon balance of urban grids, reveals the coupling mechanism between urban carbon reduction indexes and grid carbon emissions, and systematically establishes a carbon-reduction-oriented urban planning method that comprises calculation, analysis and evaluation, which is applied to Xi'an,China. This study provides a theoretical reference for cities to formulate carbon reduction targets and implement planning strategies by evaluating and predicting carbon emissions from urban building stock.

关键词： carbon emissions urban building stock calculation method carbon reduction index

Survey on Lie Group Machine Learning

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Big Data Mining and Analytics 2020年第4期3卷 235-258页

作者： mei lu Fanzhang Li the School of Software Engineering Jinling Institute of TechnologyNanjing 211169China the School of Computer Science and Technology Jiangsu Normal UniversityXuzhou 221000China the School of Computer Science and Technology Soochow UniversitySuzhou 215006China

Lie group machine learning is recognized as the theoretical basis of brain intelligence,brain learning,higher machine learning,and higher artificial *** sets of Lie group matrices are widely available in practical *** group learning is a vibrant field of increasing importance and extraordinary potential and thus needs to be developed *** study aims to provide a comprehensive survey on recent advances in Lie group machine *** introduce Lie group machine learning techniques in three major categories:supervised Lie group machine learning,semisupervised Lie group machine learning,and unsupervised Lie group machine *** addition,we introduce the special application of Lie group machine learning in image *** work covers the following techniques:Lie group machine learning model,Lie group subspace orbit generation learning,symplectic group learning,quantum group learning,Lie group fiber bundle learning,Lie group cover learning,Lie group deep structure learning,Lie group semisupervised learning,Lie group kernel learning,tensor learning,frame bundle connection learning,spectral estimation learning,Finsler geometric learning,homology boundary learning,category representation learning,and neuromorphic synergy ***,this survey aims to provide an insightful overview of state-of-the-art development in the field of Lie group machine *** will enable researchers to comprehensively understand the state of the field,identify the most appropriate tools for particular applications,and identify directions for future research.

关键词： Lie group machine learning Lie group subspace orbit generation learning quantum group learning symplectic group learning Lie group fiber bundle learning

Test-case prioritization： achievements and challenges

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Frontiers of Computer Science 2016年第5期10卷 769-777页

作者： Dan HAO lu ZHANG Hong mei Key Laboratory of High Confidence Software Technologies (Peking University) Ministry of Education Beijing 100871 China Institute of Software School of Electronics Engineering and Computer Science Peking University Beijing 100871 China

Test-case prioritization, proposed at the end of last century, aims to schedule the execution order of test cases so as to improve test effectiveness. In the past years, test-case prioritization has gained much attention, and has significant achievements in five aspects： prioritization algorithms, coverage criteria, measurement, practical concems involved, and application scenarios. In this article, we will first review the achievements of test-case prioritization from these five as- pects and then give our perspectives on its challenges.

关键词： test-case prioritization achievements challenges

Analytic approximation to nonlinear hydroelastic waves traveling in a thin elastic plate floating on a fluid

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Science China(Physics,Mechanics & Astronomy) 2013年第11期56卷 2170-2177页

作者： WANG ping lu DongQiang Shanghai Institute of Applied Mathematics and Mechanics Shanghai University College of Mathematical Science and Physics Qingdao University of Science and Technology Shanghai Key Laboratory of Mechanics in Energy Engineering

An analytic approximation method known as the homotopy analysis method(HAM)is applied to study the nonlinear hydroelastic progressive waves traveling in an infinite elastic plate such as an ice sheet or a very large floating structure(VLFS)on the surface of deep water.A convergent analytical series solution for the plate deflection is derived by choosing the optimal convergencecontrol *** on the analytical solution the efects of diferent parameters are *** find that the plate deflection becomes lower with an increasing Young’s modulus of the *** displacement tends to be flattened at the crest and be sharpened at the trough as the thickness of the plate increases,and the larger density of the plate also causes analogous ***,it is shown that the hydroelastic response of the plate is greatly afected by the high-amplitude incident *** results obtained can help enrich our understanding of the nonlinear hydroelastic response of an ice sheet or a VLFS on the water surface.

关键词： homotopy analysis method(HAM) nonlinear progressive waves elastic plate nonlinear hydroelastic response

Effect and Safety of Acupuncture for Type 2 Diabetes Mellitus:A Systematic Review and Meta-analysis of 21 Randomised Controlled Trials

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Chinese Journal of Integrative Medicine 2022年第5期28卷 463-471页

作者： LI Shu-qing CHEN Jian-rong LIU mei-lu WANG Yan-ping ZHOU Xu SUN Xin Evidence-Based Medicine Research Centre Jiangxi University of Traditional Chinese MedicineNanchang(330004)China Department of Endocrinology the First Affiliated Hospital of Nanchang UniversityNanchang(330006)China Department of Integrated Chinese and Western Medicine West China HospitalSichuan UniversityChengdu(610041)China Chinese Evidence-Based Medicine Centre West China HospitalSichuan UniversityChengdu(610041)China

Objective:To evaluate the effects of acupuncture on hypoglycaemic outcomes in type 2 diabetes mellitus(T2 DM).Methods:Pub Med,Embase,Cochrane Library,and Clinical *** were searched from inception up to July 2020,to identify randomised controlled trials(RCTs)that enrolled patients with T2 DM and compared acupuncture combined with antidiabetic drugs to antidiabetic drugs *** primary outcomes were haemoglobin A1 c(Hb A1 c)and fasting blood glucose(FBG).The secondary outcomes included 2-h blood glucose(2 h BG),fasting insulin(FINS),homeostatic model assessment for insulin resistance(HOMA-IR),and acupuncture-related adverse *** difference(MD)and 95%confidence interval(CI)were used as the effect measure in the *** quality of evidence was assessed using the Grading of Recommendations Assessment,Development and Evaluation ***:Twenty-one RCTs(n=1,188)were *** meta-analytic results showed that the acupuncture group had greater reductions in FBG(MD-6.46 mg/d L,95%CI-11.95 to-0.98;moderate-quality evidence)and HOMA-IR(MD-1.23,95%CI-2.16 to-0.31;low-quality evidence),but comparable changes in Hb A1 c(MD-0.39%,95%CI-0.84 to 1.61;very-low-quality evidence),2 h BG(MD-4.99 mg/d L,95%CI-20.74 to 10.76;low-quality evidence),and FINS(MD-1.32μIU/m L,95%CI-3.76 to 1.12;low-quality evidence).No data on the incidence of diabetic complications were *** acupuncture-related adverse events reported were ***:The current evidence suggests that acupuncture,as a complementary therapy to antidiabetic drugs,has a small but statistically significant effect on decreasing FBG and improving insulin *** effects of acupuncture on Hb A1 c,2 h BG,and FINS remain *** is generally safe in patients with mild *** evidence for the long-term effects of acupuncture on T2 DM is needed.(Registration ***42018115639)

关键词： acupuncture type 2 diabetes mellitus systematic review meta-analysis

Panconnectivity for Interconnection Networks with Faulty Elements

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Acta Mathematica Sinica,English Series 2010年第4期26卷 647-652页

作者： mei lu Hui Qing LIU Department of Mathematical Sciences Tsinghua University Beijing 100084 P. R. China School of Mathematics and Computer Science Hubei University Wuhan 430062 P. R. China

Let Go and G1 be two graphs with the same vertices. The new graph G（G0, G1; M） is a graph with the vertex set V（0o） ∪）V（G1） and the edge set E（Go） UE（G1） UM, where M is an arbitrary perfect matching between the vertices of Go and G1, i.e., a set of cross edges with one endvertex in Go and the other endvertex in G1. In this paper, we will show that if Go and G1 are f-fault q-panconnected, then for any f 〉 2, G（G0, G1; M） is （f ＋ 1）-fault （q ＋ 2）-panconnected.

关键词： fault vertex fault edge fault panconnected interconnection networks

Eigenvalues and Diameter

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Acta Mathematica Sinica,English Series 2011年第6期27卷 1107-1114页

作者： Hui Qing LIU mei lu School of Mathematics and Computer Science Hubei University Wuhan 430062 P. R. China Department of Mathematical Sciences Tsinghua University Beijing 100084 P. R. China

Let G be a connected graph of order n. The diameter of a graph is the maximum distance between any two vertices of G. In this paper, we will give some bounds on the diameter of G in terms of eigenvalues of adjacency m... 详细信息

关键词： Graph Laplacian matrix adjacency matrix diameter