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Some Class 1 graphs on gc-colorings

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Acta mathematica Sinica,English Series 2016年第10期32卷 1237-1245页

作者： Hua Wen ma Xia ZHANg School of mathematical Sciences Shandong Normal UniversityJi'nan 250014P·R·China

An edge-coloring of a graph g is an coloring of a graph g is an edge-coloring of g such assignment of colors to all the edges of g. A go- that each color appears at each vertex at least g（v） times. The maximum integer k such that g has a go-coloring with k colors is called the gc-chromatic index of g and denoted by X＇gc （g）. In this paper, we extend a result on edge-covering coloring of Zhang X＇gc（） = δg（g）, and Liu in 2011, and give a new sufficient condition for a simple graph g to satisfy ＇ x＇gc（g）=δg（g）,where δg（g）=minv∈V（g）{[d（v）/g（v）]}.

关键词： Edge-coloring go-coloring go-chromatic index edge covering classification problem

Soil Salinity and Soil Water Content Estimation Using Digital Images in Coastal Field:A Case Study in Yancheng City of Jiangsu Province,China

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Chinese geographical Science 2022年第4期32卷 676-685页

作者： XU Lu ma Hongyuan WANg Zhichun School of geography Geomatics and PlanningJiangsu Normal UniversityXuzhou 221116China Northeast Institute of geography and Agroecology Chinese Academy of SciencesChangchun 130012China

Soil is the essential part for agricultural and environmental sciences,and soil salinity and soil water content are both the important influence factors for sustainable development of agriculture and ecological *** camera,as one of the most popular and convenient proximal sensing instruments,has its irreplaceable position for soil properties *** this study,we collected 52 soil samples and photographs at the same time along the coast in Yancheng City of Jiangsu *** carefully analyzed the relationship between soil properties and image brightness,and found that soil salt content had higher correlation with average image brightness value than soil water *** the brightness levels,the high correlation coefficients between soil salt content and brightness levels concentrated on the high brightness values,and the high correlation coefficients between soil water content and brightness levels focused on the low brightness *** significance levels(P)determined different brightness levels related to soil properties,hence P value setting can be an optional way to select brightness levels as the input variables for modeling soil *** these information,random forest algorithm was applied to develop soil salt content and soil water content inversion models using randomly 70%of the dataset,and the rest data for testing *** results showed that soil salt content model had high accuracy(R_(v)^(2)=0.79,RMSE_(v)=12 g/kg,and RPD_(v)=2.18),and soil water content inversion model was barely satisfied(R_(v)^(2)=0.47,RMSE_(v)=3.04%,and RPD_(v)=1.38).This study proposes a method of modeling soil properties with a digital *** unmanned aerial vehicle(UAV),it has potential popularization and application value for precise agriculture and land management.

关键词： soil salinity soil water content coastal soil digital image

Integrable nonlocal PT-symmetric generalized so(3,R)-mKdV equations

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Communications in Theoretical Physics 2023年第12期75卷 19-24页

作者： Shou-Ting Chen Wen-Xiu ma School of mathematics and Statistics Xuzhou University of TechnologyXuzhou 221008JiangsuChina Department of mathematics Zhejiang Normal UniversityJinhua 321004ZhejiangChina Department of mathematics King Abdulaziz UniversityJeddah 21589Saudi Arabia Department of mathematics and Statistics University of South FloridaTampaFL 33620-5700United States of America School of mathematical and Statistical Sciences North-West UniversityMafikeng CampusPrivate Bag X2046Mmabatho 2735South Africa

Based on a soliton hierarchy associated with so(3,R),we construct two integrable nonlocal PT-symmetric generalized mKdV *** key step is to formulate two nonlocal reverse-spacetime similarity transformations for the involved spectral matrix,and therefore,integrable nonlocal complex and real reverse-spacetime generalized so(3,R)-mKdV equations of fifth-order are *** resulting reduced nonlocal integrable equations inherit infinitely many commuting symmetries and conservation laws.

关键词： integrable equation lax pair nonlocal reduction PT-symmetry zero curvature equation

Characteristics of different aged plantations of Ormosia hosiei with regards to soil microbial biomass and enzymatic activities

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Journal of Forestry Research 2024年第6期35卷 121-134页

作者： Xiaolong Zhao Peilin Xie Xueqian Zhang Zeyu Ou Haoxuan ma Chun Suo Jingqi ma Pan Wan College of Forestry Northwest A&F UniversityYangling 712100People’s Republic of China

Stand age is an important indicator of tree growth and life cycle,and has implications for ecological and biological *** study examined changes in soil microbial biomass(SMB)as well as enzyme activities of different aged plantations and revealed their relationship to soil ***,microbial biomass carbon(MBC),microbial biomass nitrogen(MBN),microbial biomass phos-phorous(MBP)and enzyme activities(β-1,4-glucosidase(β-g),β-1,4-xylosidase(β-X),cellobiohydrolase(CBH),leucine aminopeptidase(LAP),β-1,4-n-acetylglucosamine(NAg)and acid phosphatase(ACP))were measured in Oro-mosia hosiei plantations of different *** soil qual-ity index(SQI)model assessed soil *** contents significantly decreased in young(7-year-old)and mature plantations(45-year-old)compared to middle-aged(20-year-old)*** of soilβ-g,β-X,CBH and NAg in the 20-year-old plantations was markedly higher than in the other plantations except forβ-g,CBH and NAg in the 45-year-old *** organic carbon(SOC),total potassium(TK),total porosity,dissolved organic carbon,nitrate nitrogen(NO_(3)--N)and non-capillary porosity were key factors affecting SMB,while soil bulk density,pH,SOC,NO_(3)--N,TK and forest litter(FL)were the main factors affecting soil enzyme *** decreased in the order:middle-aged>mature>*** efficiency of soil organic matter conversion,the effect of nitrogen min-eralization and fixation by microorganisms,and the better efficiency of phosphorus utilization in mid-age plantations,which improves soil physical properties,better facilitates tree growth,and further improves the buffering of the soil against acidity and *** quality was the only soil biological factor affecting soil enzyme *** findings demonstrate that different aged plantations affect soil micro-bial biomass,enzyme activity,and soil quality.

关键词： Plantation age Soil properties Microbial metabolism Soil health Environmental impact

Transformation among precipitation,surface water,groundwater,and mine water in the Hailiutu River Basin under mining activity

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Journal of Arid Land 2022年第6期14卷 620-636页

作者： LI Qian ma Long LIU Tingxi College of Water Conservancy and Civil Engineering College Inner Mongolia Agricultural UniversityHohhot 010018China

Coal mining has changed the hydrogeological conditions of river basins,and studying how the relationship among different types of water body has changed under the influence of coal mining is of great significance for understanding the regional hydrological *** analyzed the temporal and spatial distribution of hydrochemical properties and environmental isotopes in the Hailiutu River Basin(HRB),China with a mixed *** results showed that:(1)human activity(e.g.,coal mining and agricultural production)causes considerable changes in the hydrochemical properties of surface water in and around the mining areas,and leads to significant increases in the concentrations of Na^(+)and SO_(4)^(2-);(2)precipitation is the main source of water vapour in the *** transformation between surface water and groundwater in the natural watershed is mainly affected by precipitation;and(3)in the mining areas,the average contribution rates of precipitation to the recharge of surface water and groundwater increased by 2.6%-7.9%and 2.7%-9.9%,*** in the Salawusu Formation constitutes up to 61.3%-72.4%of mine ***,this study is beneficial for quantifying the effects of coal mining on local hydrological *** research results can provide a reference for local water resources management and ecological environment improvement.

关键词： precipitation mine water groundwater surface water transformation mode

Improved Algorithm for Solving Discrete Logarithm Problem by Expanding Factor

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China Communications 2020年第4期17卷 31-41页

作者： Bin Qi Jie ma Kewei Lv State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of SciencesBeijing 100093China Data Assurance Communication Security Research Center Chinese Academy of SciencesBeijing 100093China School of Cyber Security University of Chinese Academy of SciencesBeijing 100093China

The discrete logarithm problem(DLP)is to find a solution n such that g^n=h in a finite cyclic group g=,where h∈*** DLP is the security foundation of many cryptosystems,such as *** propose a method to improve Pollard’s kangaroo algorithm,which is the classic algorithm for solving the *** the proposed algorithm,the large integer multiplications are reduced by controlling whether to perform large integer *** control the process,the tools of expanding factor and jumping distance are *** expanding factor is an indicator used to measure the probability of *** integer multiplication is performed if the value of the expanding factor is greater than the given *** improved algorithm requires an average of(1.633+o(1))q(1/2)times of the large integer *** experiments,the average large integer multiplication times is approximately(1.5+o(1))q(1/2).

关键词： discrete logarithm algorithm pollard’s kangaroo algorithm jumping distance

An Efficient Correlation-Aware Anomaly Detection Framework in Cellular Network

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China Communications 2022年第8期19卷 168-180页

作者： Haihan Nan Xiaoyan Zhu Jianfeng ma State Key Laboratory of Integrated Service Networks Xidian UniversityXi’an 710071China School of Cyber Engineering Xidian UniversityXi’an 710071China

Nowadays,the fifth-generation(5g)mobile communication system has obtained prosperous development and deployment,reshaping our daily ***,anomalies of cell outages and congestion in 5g critically influence the quality of experience and significantly increase operational *** several big data and artificial intelligencebased anomaly detection methods have been proposed for wireless cellular systems,they change distributions of the data and ignore the relevance among user activities,causing anomaly detection ineffective for some *** this paper,we propose a highly effective and accurate anomaly detection framework by utilizing generative adversarial networks(gAN)and long short-term memory(LSTM)neural *** framework expands the original dataset while simultaneously keeping the distribution of data unchanged,and explores the relevance among user activities to further improve the system *** results demonstrate that our framework can achieve 97.16%accuracy and 2.30%false positive rate by utilizing the correlation of user activities and data expansion.

关键词： cellular network anomaly detection generative adversarial networks(gAN) long short-term memory(LSTM) call detail record(CDR)

Kidney fibrosis:from mechanisms to therapeutic medicines

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Signal Transduction and Targeted Therapy 2023年第4期8卷 1664-1683页

作者： Rongshuang Huang Ping Fu Liang ma Kidney Research Institute Division of NephrologyWest China HospitalSichuan UniversityChengdu 610041China

Chronic kidney disease (CKD) is estimated to affect 10–14% of global population. Kidney fibrosis, characterized by excessiveextracellular matrix deposition leading to scarring, is a hallmark manifestation in different progressive CKD;However, at present noantifibrotic therapies against CKD exist. Kidney fibrosis is identified by tubule atrophy, interstitial chronic inflammation andfibrogenesis, glomerulosclerosis, and vascular rarefaction. Fibrotic niche, where organ fibrosis initiates, is a complex interplaybetween injured parenchyma (like tubular cells) and multiple non-parenchymal cell lineages (immune and mesenchymal cells)located spatially within scarring areas. Although the mechanisms of kidney fibrosis are complicated due to the kinds of cellsinvolved, with the help of single-cell technology, many key questions have been explored, such as what kind of renal tubules areprofibrotic, where myofibroblasts originate, which immune cells are involved, and how cells communicate with each other. Inaddition, genetics and epigenetics are deeper mechanisms that regulate kidney fibrosis. And the reversible nature of epigeneticchanges including DNA methylation, RNA interference, and chromatin remodeling, gives an opportunity to stop or reverse kidneyfibrosis by therapeutic strategies. More marketed (e.g., RAS blockage, SgLT2 inhibitors) have been developed to delay CKDprogression in recent years. Furthermore, a better understanding of renal fibrosis is also favored to discover biomarkers of fibroticinjury. In the review, we update recent advances in the mechanism of renal fibrosis and summarize novel biomarkers andantifibrotic treatment for CKD.

关键词： Kidney therapeutic inflammation

Symmetry and monotonicity of positive solutions to Schr?dinger systems with fractional p-Laplacians

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Applied mathematics(A Journal of Chinese Universities) 2022年第1期37卷 52-72页

作者： ma Ling-wei ZHANg Zhen-qiu School of mathematical Sciences Tianjin Normal UniversityTianjin 300387China School of mathematical Sciences and LPMC Nankai UniversityTianjin 300071China

In this paper,we first establish narrow region principle and decay at infinity theorems to extend the direct method of moving planes for general fractional p-Laplacian *** virtue of this method,we investigate the qualitative properties of positive solutions for the following Schrodinger system with fractional p-Laplacian{(-△)^(s)_(p)u+au^(p-1)=f(u,v),(-△)^(t)_(p)v+bv(p-1)=g(u,v),where 0main and the nonexistence on the half space for positive solutions to the above system under some suitable conditions on f and g,respectively.

关键词： fractional p-Laplacian Schr?dinger systems direct method of moving planes radial symmetry monotonicity nonexistence