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Runoff Modeling in Ungauged Catchments Using Machine Learning Algorithm-Based Model Parameters Regionalization Methodology

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Engineering 2023年第9期28卷 93-104页

作者： Houfa Wu Jianyun Zhang Zhenxin Bao Guoqing wang wensheng wang Yanqing Yang Jie wang State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu 610065China State Key Laboratory of HydrologyWater Resources and Hydraulic Engineering Nanjing Hydraulic Research InstituteNanjing 210029China Research Center for Climate Change Ministry of Water ResourcesNanjing 210029China

Model parameters estimation is a pivotal issue for runoff modeling in ungauged *** nonlinear relationship between model parameters and catchment descriptors is a major obstacle for parameter regionalization,which is the most widely used *** modeling was studied in 38 catchments located in the Yellow–Huai–Hai River Basin(YHHRB).The values of the Nash–Sutcliffe efficiency coefficient(NSE),coefficient of determination(R2),and percent bias(PBIAS)indicated the acceptable performance of the soil and water assessment tool(SWAT)model in the *** descriptors belonging to the categories of climate,soil,vegetation,and topography were used to express the catchment characteristics related to the hydrological *** quantitative relationships between the parameters of the SWAT model and the catchment descriptors were analyzed by six regression-based models,including linear regression(LR)equations,support vector regression(SVR),random forest(RF),k-nearest neighbor(kNN),decision tree(DT),and radial basis function(RBF).Each of the 38 catchments was assumed to be an ungauged catchment in ***,the parameters in each target catchment were estimated by the constructed regression models based on the remaining 37 donor ***,the similaritybased regionalization scheme was used for comparison with the regression-based *** results indicated that the runoff with the highest accuracy was modeled by the SVR-based scheme in ungauged *** with the traditional LR-based approach,the accuracy of the runoff modeling in ungauged catchments was improved by the machine learning algorithms because of the outstanding capability to deal with nonlinear *** performances of different approaches were similar in humid regions,while the advantages of the machine learning techniques were more evident in arid *** the study area contained nested catchments,the best result was calculated with the similarity-based

关键词： Parameters estimation Ungauged catchments Regionalization scheme Machine learning algorithms Soil and water assessment tool model

DDoS Attack Detection Scheme Based on Entropy and PSO-BP Neural Network in SDN

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China Communications 2019年第7期16卷 144-155页

作者： Zhenpeng Liu Yupeng He wensheng wang Bin Zhang School of Cyberspace Security and Computer Hebei University Baoding 071002 China Information Technology Center Hebei University Baoding 071002 China School of Electronic Information Engineering Hebei University Baoding 071002 China

SDN (Software Defined Network) has many security problems, and DDoS attack is undoubtedly the most serious harm to SDN architecture network. How to accurately and effectively detect DDoS attacks has always been a difficult point and focus of SDN security research. Based on the characteristics of SDN, a DDoS attack detection method combining generalized entropy and PSOBP neural network is proposed. The traffic is pre-detected by the generalized entropy method deployed on the switch, and the detection result is divided into normal and abnormal. Locate the switch that issued the abnormal alarm. The controller uses the PSO-BP neural network to detect whether a DDoS attack occurs by further extracting the flow features of the abnormal switch. Experiments show that compared with other methods, the detection accurate rate is guaranteed while the CPU load of the controller is reduced, and the detection capability is better.

关键词： software-defined networking distributed denial of service attacks generalized information entropy particle swarm optimization back propagation neural network attack detection

Saline-Alkali Tolerance in Rice: Physiological Response, Molecular Mechanism, and QTL Identification and Application to Breeding

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Rice science 2022年第5期29卷 412-434页

作者： Ratan Kumar GANAPATI Shahzad Amir NAVEED Sundus ZAFAR wang wensheng XU Jianlong Institute of Crop Sciences National Key Facility for Crop Gene Resources and Genetic ImprovementChinese Academy of Agricultural SciencesBeijing 100081China Shenzhen Branch Guangdong Laboratory for Lingnan Modern AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China

Salinity-alkalinity is incipient abiotic stress that impairs plant growth and ***(Oryza sativa)is a major food crop greatly affected by soil salinity and alkalinity,requiring tolerant varieties in the saline-alkali prone *** the molecular and physiological mechanisms of saline-alkali tolerance paves the base for improving saline-alkali tolerance in rice and leads to progress in *** review illustrated the physiological consequences,and molecular mechanisms especially signaling and function of regulating genes for saline-alkali tolerance in rice *** also discussed QTLs regarding saline-alkali tolerance accordingly and ways of deployment for *** efforts are needed to identify and utilize the identified QTLs for saline-alkali tolerance in rice.

关键词： saline-alkali tolerance physiological mechanism molecular mechanism marker-assisted backcrossing rice

Comprehensive profiling and natural variation of flavonoids in rice

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Journal of Integrative Plant Biology 2014年第9期56卷 876-886页

作者： Xuekui Dong Wei Chen wensheng wang Hongyan Zhang Xianqing Liu Jie Luo National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research(Wuhan) Huazhong Agricultural University Key Laboratory of Horticultural Plant Biology(Ministry of Education) Huazhong Agricultural University College of Life Science and Technology Huazhong Agricultural University

Flavonoids constitute a major group of plant phenolic *** extensively studied in Arabidopsis,profiling and naturally occurring variation of these compounds in rice（Oryza sativa）,the monocot model plant,are less *** a collection of rice germplasm,comprehensive profiling and natural variation of flavonoids were presented in this *** of a widely targeted metabolomics method facilitated the simultaneous identification and quantification of more than 90 flavonoids using liquid chromatography tandem mass spectrometry（LC-MS/MS）.Comparing flavonoid contents in various tissues during different developmental stages revealed tissue-specific accumulation of most *** investigation indicated that flavone mono-C-glycosides,malonylated flavonoid O-hexosides,and some flavonoid O-glycosides accumulated at significantly higher levels in indica than in japonica,while the opposite was observed for aromatic acylated flavone *** contrast to the highly differential accumulation between the two subspecies,relatively small variations within subspecies were detected for most ***,an association analysis between flavonoid accumulation and its biosynthetic gene sequence polymorphisms disclosed that natural variation of flavonoids was probably caused by sequence polymorphisms in the coding region of flavonoid biosynthetic *** work paves the way for future dissection of biosynthesis and regulation of flavonoid pathway in rice.

关键词： Flavonoids metabolic profiling natural variation Oryza sativa single-nucleotide polymorphisms

DNA methylation changes detected by methylation-sensitive amplified polymorphism in two contrasting rice genotypes under salt stress

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Journal of Genetics and Genomics 2011年第9期38卷 419-424页

作者： wensheng wang Xiuqin Zhao Yajiao Pan Linghua Zhu Binying Fu Zhikang Li Institute of Crop Sciences National Key Facility for Crop Gene Resources and Genetic Improvement Chinese Academy of Agricultural Sciences Beijing 100081 China International Rice Research Institute DAPO Box 7777 Metro Manila Philippines

DNA methylation,one of the most important epigenetic phenomena,plays a vital role in tuning gene expression during plant development as well as in response to environmental *** the present study,a methylation-sensitive amplified polymorphism（MSAP） analysis was performed to profile DNA methylation changes in two contrasting rice genotypes under salt *** with visibly different phenotypes in response to salt stress,epigenetic markers classified as stable inter-cultivar DNA methylation differences were determined between salt-tolerant FL478 and salt-sensitive *** addition,most tissue-specific DNA methylation loci were conserved,while many of the growth stage-dependent DNA methylation loci were dynamic between the two ***,salt stress induced a decrease in DNA methylation specifically in roots at the seedling stage that was more profound in IR29 than in the *** result may indicate that demethylation of genes is an active epigenetic response to salt stress in roots at the seedling stage,and helps to further elucidate the implications of DNA methylation in crop growth and development.

关键词： DNA methylation MSAP Salt tolerance Rice

Genome-Wide Association Study of Cooked Rice Textural Attributes and Starch Physicochemical Properties in indica Rice

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Rice science 2024年第3期31卷 300-316,I0018-I0041页

作者： DENG Bowen ZHANG Yanni ZHANG Fan wang wensheng XU Jianlong ZHANG Yu BAO Jinsong Institute of Nuclear Agricultural Sciences Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agriculture and Zhejiang ProvinceCollege of Agriculture and BiotechnologyZhejiang UniversityHangzhou 310058China Hainan Institute Zhejiang UniversitySanya 572025China Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China

Rice cooking and eating qualities(CEQ)are mainly determined by cooked rice textural parameters and starch physicochemical ***,the genetic bases of grain texture and starch properties in rice have not been fully *** conducted a genome-wide association study for apparent amylose content(AAC),starch pasting viscosities,and cooked rice textural parameters using 279 indica rice accessions from the 3000 Rice Genome *** identified 26 QTLs in the whole population and detected single nucleotide polymorphisms(SNPs)with the lowest P-value at the Waxy(Wx)locus for all traits except pasting temperature and ***,we detected significant SNPs at the SUBSTANDARD STARCH GRAIN6(SSG6)locus for AAC,setback(SB),hardness,adhesiveness,chewiness(CHEW),gumminess(GUM),and *** subsequently divided the population using a SNP adjacent to the Waxy locus,and identified 23 QTLs and 12 QTLs in two sub-panels,WxT and WxA,*** these sub-panels,SSG6 was also identified to be associated with pasting parameters,including peak viscosity,hot paste viscosity,cold paste viscosity,and consistency ***,a candidate gene encoding monosaccharide transporter 5(OsMST5)was identified to be associated with AAC,breakdown,SB,CHEW,and *** total,39 QTLs were co-localized with known genes or previously reported *** identified genes and QTLs provide valuable information for genetic manipulation to improve rice CEQ.

关键词： cooking and eating quality genome-wide association study rice Waxy gene

The basic helix-loop-helix transcription factor gene,OsbHLH38,plays a key role in controlling rice salt tolerance

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Journal of Integrative Plant Biology 2023年第8期65卷 1859-1873页

作者： Fengping Du Yinxiao wang Juan wang Yingbo Li Yue Zhang Xiuqin Zhao Jianlong Xu Zhikang Li Tianyong Zhao wensheng wang Binying Fu Institute of Crop Sciences/State Key Laboratory of Crop Gene Resources and Breeding Chinese Academy of Agricultural SciencesBeijing100081China State Key Laboratory of Crop Stress Biology for Arid Areas College of Life SciencesNorthwest A&F UniversityYangling 712100China Anhui Agricultural University Hefei 230036China Hainan Yazhou Bay Seed Lab/National Nanfan Research Institute(Sanya) Chinese Academy of Agricultural SciencesSanya 572024China

The plant hormone abscisic acid(ABA)is crucial for plant seed germination and abiotic stress ***,the association between ABA sensitivity and plant abiotic stress tolerance remains largely *** this study,436 rice accessions were assessed for their sensitivity to ABA during seed *** considerable diversity in ABA sensitivity among rice germplasm accessions was primarily reflected by the differentiation between the Xian(indica)and Geng(japonica)subspecies and between the upland-Geng and lowland-Geng *** upland-Geng accessions were most sensitive to ***-wide association analyses identified four major quantitative trait loci containing21 candidate genes associated with ABA sensitivity of which a basic helix-loop-helix transcription factor gene,OsbHLH38,was the most important for ABA *** functional analyses using knockout and overexpression transgenic lines revealed that OsbHLH38 expression was responsive to multiple abiotic *** of OsbHLH38 increased seedling salt tolerance,while knockout of OsbHLH38 increased sensitivity to salt stress.A salt-responsive transcription factor,OsDREB2A,interacted with OsbHLH38 and was directly regulated by ***,OsbHLH38 affected rice abiotic stress tolerance by mediating the expression of a large set of transporter genes of phytohormones,transcription factor genes,and many downstream genes with diverse functions,including photosynthesis,redox homeostasis,and abiotic stress *** results demonstrated that OsbHLH38 is a key regulator in plant abiotic stress tolerance.

关键词： abscisic acid genome-wide association analysis rice salttolerance seedgermination

Effect of Cardioplegia for Myocardial Protection in Pediatric Cardiac Surgery:A Network Meta-Analysis

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Congenital Heart Disease 2021年第6期16卷 609-645页

作者： Ke Zhou Dongyu Li Xintong Zhang wensheng wang Shusen Li Guang Song Department of Cardiac Surgery Shengjing Hospital of China Medical UniversityShenyangChina Department of Ultrasound Shengjing Hospital of China Medical UniversityShenyangChina

Cardioplegia has been widely used to reduce myocardial injury during pediatric cardiac surgery;however,which cardioplegia solution has the best protective effect has not been ***,we compared the myocardial protective effects of different cardioplegia solutions used in pediatric cardiac *** databases were searched to identify the relevant randomized controlled trials.A network meta-analysis with a Bayesian framework was *** outcomes included the following biochemical and clinical outcomes:serum concentrations of the creatine kinase-myocardial band at 6 h postoperatively;cardiac troponin I(cTnI)at 4,12,and 24 h postoperatively;spontaneous beating after declamping;postoperative arrhythmias;inotropic support percentage and duration;mechanical ventilation hours;intensive care unit stay in days;hospital stay in days;and *** group treated with cold crystalloid cardioplegia(cCCP)was chosen as the control *** 22 studies involved 1529 *** types of cardioplegia solutions were described in these studies,including cold blood cardioplegia,cCCP,del Nido,histidine-tryptophan-ketoglutarate(HTK),terminal warm blood cardioplegia,and warm blood cardioplegia(wBCP).The serum concentrations of the 24-h cTnI with wBCP(MD=−2.52,95%CI:−4.74 to−0.27)was significantly lower than *** serum concentrations of the 24-h cTnI with HTK(MD=4.91,95%CI:2.84–7.24)was significantly higher than *** was no significant difference in other biochemical and clinical outcomes when compared to *** conclusion,wBCP may have a superior myocardial protective effect with lower 24-h cTnI levels postoperatively and similar clinical outcomes after pediatric cardiac surgery.

关键词： Cardioplegia pediatric cardiac surgery cardiac troponin I meta-analysis

The landscape of gene-CDS-haplotype diversity in rice:Properties,population organization,footprints of domestication and breeding,and implications for genetic improvement

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Molecular Plant 2021年第5期14卷 787-804页

作者： Fan Zhang Chunchao wang Min Li Yanru Cui Yingyao Shi Zhichao Wu Zhiqiang Hu wensheng wang Jianlong Xu Zhikang Li nstitute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing100081.China College of Agronomy Anhui Agricultural UniversityHefeiAnhui230036China College of Agronomy Hebei Agricultural UniversityBaodingHebei071001China Shenzhen Branch Guangdong Laboratory for Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhenGuangdong518120China Department of Plant and Microbial Biology University of CaliforniaBerkeleyCA94720USA

Polymorphisms within gene coding regions represent the most important part of the overall genetic diversity of *** characterized the gene-coding sequence-haplotype(gcHap)diversity of 45963 rice genes in 3010 rice *** an average of 226±390 gcHaps per gene in rice populations,rice genes could be classified into three main categories:12865 conserved genes,10254 subspecific differentiating genes,and 22844 remaining *** found that 39218 rice genes carry>255179 major gcHaps of potential functional ***(87.5%)of the detected gcHaps were specific to subspecies or *** inferred proto-ancestors of local landrace populations reconstructed from conserved predominant(ancient)gcHaps correlated strongly with wild rice accessions from the same geographic regions,supporting a multiorigin(domestication)model of Oryza *** breeding efforts generally increased the gcHap diversity of modern varieties and'caused significant frequency shifts in predominant gcHaps of 14266 genes due to independent selection in the two *** frequencies of“favorable”gcHaps at most known genes related to rice yield in modern varieties suggest huge potential for rice improvement by mining and pyramiding of favorable *** gcHap data were demonstrated to have greater power than SNPs for the detection of causal genes that affect complex *** rice gcHap diversity dataset generated in this study would facilitate rice basic research and improvement in the future.

关键词： gene-CDS-haplotype diversity functional alleles genome-wide selection signals evolution