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Communications in Theoretical Physics 2009年第9期52卷 545-548页

作者： liu wen-de GAN Zi-Zhao National Institute of Metrology Beijing 100013 China School of Physics and State Key Laboratory for Artificial Microstructures and Mesoscopic Physics Peking University Beijing 100871 China

By introducing the distribution of the light energy density in GaN-based light-emitting diode (LED),theLED model based on the incoherent regime and the light extraction efficiency are *** energy density asa function of the angle of incidence is calculated to demonstrate the mechanism of the light *** deviationbetween the tendencies of the transmissivity of the output layer and the extraction efficiency is also demonstrated.

关键词： light-emitting diodes extraction efficiency Bragg diffraction photonic crystals

Integrated pest management programme for cereal blast fungus Magnaporthe oryzae

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Journal of Integrative Agriculture 2022年第12期21卷 3420-3433页

作者： ZHANG Hai-feng Tofazzal ISLAM liu wen-de department of Plant Pathology College of Plant ProtectionNanjing Agricultural University/Key Laboratory of Integrated Management of Crop Diseases and Pests of Ministry of EducationNanjing 210095P.R.China Institute of Biotechnology and Genetic Engineering Bangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur 1706Bangladesh State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China

Magnaporthe oryzae,the causal agent of blast diseases,is a destructive filamentous fungus that infects many plants including most economically important food crops,rice,wheat,pearl millet and finger *** oryzae has numerous pathotypes because of its high host-specificity in the *** Oryza pathotype(MoO)of *** is the most devastating pathogen of rice,causing 10–30%yield loss in the *** the other hand,the Triticum pathotype(MoT)causes blast disease in wheat,which is now a serious threat to wheat production in some South American countries,Bangladesh and *** of low fungicide efficacy against the blast diseases and lack of availability of resistant varieties,control of rice and wheat blast diseases is ***,an integrated management programme should be adopted to control these two diseases in the ***,we introduced and summarized the classification,geographical distribution,host range,disease symptoms,biology and ecology,economic impact,and integrated pest management(IPM)programme of both rice and wheat blast diseases.

关键词： rice blast wheat blast Magnaporthe oryzae integrated pest management

A WD-GA-LSSVM model for rainfall-triggered landslide displacement prediction

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Journal of Mountain Science 2018年第1期15卷 156-166页

作者： ZHU Xing MA Shu-qi XU Qiang liu wen-de State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology School of Civil and Environmental Engineering Nanyang Technological University

This paper proposes a WD-GA-LSSVM model for predicting the displacement of a deepseated landslide triggered by seasonal rainfall,in which wavelet denoising(WD)is used in displacement time series of landslide to eliminate the GPS observation noise in the original data,and genetic algorithm(GA)is applied to obtain optimal parameters of least squares support vector machines(LSSVM)*** model is first trained and then evaluated by using data from a gentle dipping(~2°-5°)landslide triggered by seasonal rainfall in the southwest of *** comparisons of WD-GA-LSSVM model with Back Propagation Neural Network(BPNN)model and LSSVM are presented,*** results indicate that the adoption of WD-GA-LSSVM model significantly improves the robustness and accuracy of the displacement prediction and it provides a powerful technique for predicting the displacement of a rainfall-triggered landslide.

关键词： WD-GA-LSSVM Landslide Rainfall Displacement prediction Wavelet denoising

Transcriptomic insights into growth promotion effect of Trichoderma afroharzianum TM2-4 microbial agent on tomato plants

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Journal of Integrative Agriculture 2021年第5期20卷 1266-1276页

作者： ZHAO Juan liu Ting liu Wei-cheng ZHANG Dian-peng DONG Dan WU Hui-ling ZHANG Tao-tao liu de-wen Institute of Plant and Environment Protection Beijing Academy of Agriculture and Forestry SciencesBeijing 100097P.R.China

Plant growth promoting fungi are receiving increased attention as valuable beneficial microorganisms in crop cultivation due to their capacity to produce bioactive substances,promote plant growth and enhance immune defense *** this study,a novel Trichoderma isolate,designated as TM2-4,was screened from healthy tomato rhizosphere soil and identified as Trichoderma *** filtrate of the isolate TM2-4 displayed obvious bioactive substance production and an evident effect in promoting tomato seed germination,with hypocotyl length,radical length and vigor index increased by 28.7,19.4 and 62.1%,respectively,after a 100-fold dilution *** assess the promotion effect and related mechanism of isolate TM2-4,the plant biological indexes and gene expression profiles of tomato plants treated with or without *** TM2-4 microbial agent were investigated by greenhouse pot experiment and RNA *** results demonstrated that *** TM2-4 significantly promoted tomato plant growth in terms of plant height,dry weight,number of leaves per plant and root activity,through efficient colonization in the rhizosphere and root system of the *** analyses identified a total of 984 differentially expressed genes in *** microbial agent inoculated tomato roots,which were mainly engaged in the biological process of phytohormone homeostasis,antioxidant activity,as well as metabolic pathways including phenylpropanoid biosynthesis and glutathione *** findings provide useful information for understanding the mechanism of isolate TM2-4 for tomato plant growth promotion,which would facilitate further development of *** TM2-4 microbial agent for use in vegetable crop production.

关键词： Trichoderma afroharzianum Solanum lycopersicum L. plant growth promotion transcriptome analyses qRTPCR

Bioinformatic analysis and functional characterization of the cfem proteins in maize anthracnose fungus Colletotrichum graminicola

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Journal of Integrative Agriculture 2020年第2期19卷 541-550页

作者： GONG An-dong JING Zhong-ying ZHANG Kai TAN Qing-qun WANG Guo-liang liu wen-de State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China College of Life Science Xinyang Normal UniversityXinyang 464000P.R.China department of Plant Pathology The Ohio State UniversityColumbusOhio 43210USA

Fungal secreted proteins that contain the Common in Fungal Extracellular Membrane(CFEM)domain are important for *** hemibiotrophic fungus Colletotrichum graminicola causes the serious anthracnose disease of *** this study,we identified 24 CgCFEM proteins in the genome of *** analysis revealed that these 24 proteins(CgCFEM1–24)can be divided into 2 clades based on the presence of the trans-membrane *** alignment analysis indicated that the amino acids of the CFEM domain are highly conserved and contain 8 spaced cysteines,with the exception that CgCFEM1 and CgCFEM24 lack 1 and 2 cysteines,*** CgCFEM proteins with a signal peptide and without the trans-membrane domain were considered as candidate effectors and,thus were selected for structural prediction and functional *** CFEM domain in the candidate effectors can form a helical-basket structure homologous to the Csa2 protein in Candida albicans,which is responsible for haem acquisition and *** localization analysis revealed that these effectors accumulate in the cell membrane,nucleus,and cytosolic ***,5 effectors,CgCFEM6,7,8,9 and 15,can suppress the BAX-induced programmed cell death in Nicotiana benthamiana with or without the signal *** results demonstrate that these 10 CgCFEM candidate effectors with different structures and subcellular localizations in host cells may play important roles during the pathogenic processes on maize plants.

关键词： CFEM domain candidate effector anthracnose disease maize Colletotrichum graminicola

The effects of soil properties, cropping systems and geographic location on soil prokaryotic communities in four maize production regions across China

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Journal of Integrative Agriculture 2022年第7期21卷 2145-2157页

作者： TIAN Xue-liang liu Jia-jia liu Quan-cheng XIA Xin-yao PENG Yong Alejandra I.HUERTA YAN Jian-bing LI Hui liu wen-de State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China Henan Engineering Research Center of Biological Pesticide&Fertilizer development and Synergistic Application Henan Institute of Science and TechnologyXinxiang 453003P.R.China School of Biological Science and Technology University of JinanJinan 250022P.R.China National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070P.R.China department of Entomology and Plant Pathology North Carolina State UniversityRaleigh 27606USA

The diversity of prokaryotic communities in soil is shaped by both biotic and abiotic ***,little is known about the major factors shaping soil prokaryotic communities at a large scale in *** this end,we undertook a study to investigate the impact of maize production cropping systems,soil properties and geographic location(latitude and longitude)on soil prokaryotic communities using metagenomic techniques,across four distinct maize production regions in *** all study sites,the dominant prokaryotes in soil were Alphaproteobacteria,Gammaproteobacteria,Betaproteobacteria,Gemmatimonadetes,Acidobacteria,and ***-metric multidimensional scaling revealed that prokaryotic communities clustered into the respective maize cropping systems in which they *** analysis(RDA)showed that soil properties especially pH,geographic location and cropping system jointly determined the diversity of the prokaryotic *** functional genes of soil prokaryotes from these samples were chiefly influenced by latitude,soil pH and cropping system,as revealed by RDA *** abundance of genes in some metabolic pathways,such as genes involved in microbe–microbe interactions,degradation of aromatic compounds,carbon fixation pathways in prokaryotes and microbial metabolism were markedly different across the four maize production *** study indicated that the combination of soil pH,cropping system and geographic location significantly influenced the prokaryotic community and the functional genes of these *** work contributes to a deeper understanding of the composition and function of the soil prokaryotic community across large-scale production systems such as maize.

关键词： metagenome cropping system maize soil prokaryotes

Superderivations for a Family of Lie Superalgebras of Special Type

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Communications in Mathematical Research 2011年第1期27卷 53-61页

作者： SUN XIU-MEI ZOU XU-JUAN liu wen-de School of Mathematical Sciences Harbin Normal University Harbin 150025

By means of generators, superderivations are completely determined for a family of Lie superalgebras of special type, the tensor products of the exterior algebras and the finite-dimensional special Lie algebras over a field of characteristic p〉3. In particular, the structure of the outer superderivation algebra is concretely formulated and the dimension of the first cohomology group is given.

关键词： divided power algebra special algebra superderivation

Rota-Baxter Operators of Weight 1 on 2×2-matrix Algebras

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Communications in Mathematical Research 2015年第1期31卷 71-80页

作者： LI JIN-ZHI liu wen-de Du Xian-kun School of Mathematical Sciences Harbin Normal University

In this paper we determine all Rota-Baxter operators of weight 1 on 2 ×2- matrix algebras over an algebraically closed field.

关键词： Rota-Baxter operator weight associative algebra

Invariants for Automorphisms of the Underlying Algebras Relative to Lie Algebras of Cartan Type

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Communications in Mathematical Research 2013年第4期29卷 329-334页

作者： Sun Xiu-mei Wang Jing-guo liu wen-de Du Xian-kun School of Mathematical Sciences Harbin Normal University

Let X denote a finite or infinite dimensional Lie algebra of Cartan type W, S, H or K over a field of characteristic p 〉 3. In this paper it is proved that certain filtrations of the underlying algebras are invariant... 详细信息

关键词： Lie algebra filtration automorphism

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光退色在光纤陀螺抗辐加固中的应用研究

宇航学报 2009年第2期30卷 609-612页

作者：刘德文肖文梁珣北京航空航天大学仪器科学与光电工程学院北京100083 上海航天控制工程研究所上海200233

光纤陀螺中保偏光纤环因受辐射影响使其损耗增加,从而影响到光纤陀螺的精度,限制光纤陀螺在空间应用。对光退色现象从理论和实验进行深入的分析,得出光退色能够大幅度地降低保偏光纤的辐射损耗,增强保偏光纤的抗辐射性能,从而提高光纤... 详细信息

光纤陀螺中保偏光纤环因受辐射影响使其损耗增加,从而影响到光纤陀螺的精度,限制光纤陀螺在空间应用。对光退色现象从理论和实验进行深入的分析,得出光退色能够大幅度地降低保偏光纤的辐射损耗,增强保偏光纤的抗辐射性能,从而提高光纤陀螺的抗辐射性能。最后提出了利用光退色来提高光纤陀螺主动抗辐射的方案,采用该方案光纤陀螺光学系统的损耗降低了2.24dB,验证了该方案的可行性。

关键词：光退色保偏光纤光纤陀螺辐射加固