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34篇 您的检索式:作者名="LI Yangjun"
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1Ozone sensitivity analysis with the MM5-CMAQ modeling system for Shanghai显示文摘Ozone has become one of the most important air pollution issues around the world. This article applied both O 3 /(NOy-NOx) and H 2 O 2 /HNO 3 indicators to analyze the ozone sensitivity in urban and rural areas of Shanghai, with implementation of the MM5-CMAQ modeling system in July, 2007. The meteorological parameters were obtained by using the MM5 model. A regional emission inventory with spatial and temporal allocation based on the statistical data has been developed to provide input emission data to the MM5-CMAQ modeling system. Results showed that the ozone concentrations in Shanghai show clear regional differences. The ozone concentration in rural areas was much higher than that in the urban area. Two indicators showed that ozone was more sensitive to VOCs in urban areas, while it tended to be NOx sensitive in rural areas of Shanghai.Li Li Changhong Chen Cheng Huang Haiying Huang Gangfeng Zhang Yangjun Wang Minghua Chen Hongli Wang Yiran Chen D. G. Streets Jiamo Fu 2011Journal of Environmental Sciences2011,23,7:18
2Temperature pattern dynamics in shocked porous materials显示文摘The physical fields in porous materials under strong shock wave reaction are very complicated. We simulate such systems using the grain contact material point method. The complex temperature fields in the material are treated with the morphological characterization. To compare the structures and evolution of characteristic regimes under various temperature thresholds, we introduce two concepts, structure similarity and process similarity. It is found that the temperature pattern dynamics may show high similarity under various conditions. Within the same material, the structures and evolution of high-temperature regimes may show high similarity if the shock strength and temperature threshold are chosen appropriately. For process similarity in materials with high porosity, the required temperature threshold increases parabolically with the impact velocity. When the porosity becomes lower, the increasing rate becomes higher. For process similarity in different materials, the required temperature threshold and the porosity follow a power-law relationship in some range.XU AiGuo*, ZHANG GuangCai, LI Hua, YING YangJun, YU XiJun & ZHU JianShi National Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China 2010Science China(Physics,Mechanics & Astronomy)2010,53,8:7
3Potassium Uptake and Transport in Apple Roots Under Drought Stress显示文摘As one of the most important mineral nutrient elements, potassium(K^+) plays an important role in many plant physiological processes and determines both the yield and quality of crops. There are two typical gene families that regulate K^+transport in higher plants, including K^+channels and K^+transporters. However, little is known about how these channels and transporters divide their work in response to drought stress. In this study, the hydroponic experiment was conducted on Malus hupehensis. The K^+content was found to decrease in response to drought stress in M. hupehensis, the aboveground decreased by 34.15% and the underground decreased by 3.97%. Meanwhile, the root morphology change was detected by scanning the root system. Under conditions of drought, the genes encoding K^+transporters were upregulated including MdCHX1.3, MdCHX4.11, MdCHX4.8, MdCHX4.9, Md HKT1, and MdHAK3.2. The net influx of K^+was inhibited by 19.47% with the action of K^+channel inhibitors(CsCl), however a significant decrease(80.99%; P < 0.05) was found in roots exposed to a PM H+-ATPase(orthovanadate) inhibitor by utilizing a non-invasive micro-test technique. The trend of H+efflux was similar to that of K^+. The data suggested that the positive influx of K^+through the transporter accounted for the main K^+uptake under drought stress. These results suggest that we can improve the uptake of K^+by purposely up-regulating specific K^+transporters under drought stress. This process may improve growth, yield, quality, and stress tolerance in apple trees.Jianguo Qi Simin Sun Lin Yang Mingjun Li Fengwang Ma Yangjun Zou 2019Horticultural Plant Journal2019,5,1:6
4A Genomic Variation Map Provides Insights into the Genetic Basis of Spring Chinese Cabbage (Brassica rapa ssp.pekinensis)Selection显示文摘Chinese cabbage is the most consumed leafy crop in East Asian countries.However,premature bolting induced by continuous low temperatures severely decreases the yield and quality of the Chinese cabbage, and therefore restricts its planting season and geographic distribution.In the past 40years,spring Chinese cabbage with strong winterness has been selected to meet the market demand.Here,we report a genome variation map of Chinese cabbage generated from the resequencing data of 194 geographically diverse accessions of three ecotypes.In-depth analyses of the selection sweeps and genome-wide patterns revealed that spring Chinese cabbage was selected from a specific population of autumn Chinese cabbage around the area of Shandong peninsula in northern China.We identified 23 genomic loci that underwent intensive selection,and further demonstrated by gene expression and haplotype analyses that the incorporation of elite alleles of VERNALISATION INSENTIVE 3.1(BrVIN3.1)and FLOWER LOCUS C 1(BrFLC1)is a determinant genetic source of variation during selection.Moreover,we showed that the quantitative response of BrVIN3.1 to cold due to the sequence variations in the cis elements of the BrVlN3.1 promoter significantly contributes to bolting-time variation in Chinese cabbage.Collectively, our study provides valuable insights into the genetic basis of spring Chinese cabbage selection and will facilitate the breeding of bolting-resistant Varieties by molecular-marker-assisted selection,transgenic or gene editingapproaches.Tongbing Su Weihong Wang Peirong Li Bin Zhang Pan Li Xiaoyun Xin Honghe Sun Yangjun Yu Deshuang Zhang Xiuyun Zhao Changlong Wen Gang Zhou Yuntong Wang Hongkun Zheng Shuancang Yu Fenglan Zhang 2018Molecular Plant2018,11,11:6
5Linkage map and QTL mapping of red flesh locus in apple using a R1R1×R6R6 population显示文摘The red flesh in apple fruit is a desired trait by consumers and it is associated to the anthocyanin content,which is mainly controlled by MdMYB10 with a R6 promoter.In this study,a high-density linkage group was constructed using the‘Fuji’x‘Red3’population which contained homozygous alleles R1R1 and R6R6,respectively.The linkage group consists of 7630 SNPs along 17 linkage groups,spanning 2270.21 cM,with an average density of 0.30 cM permarker.The cyanidin-3-galactoside concentration was used as the phenotypic data in QTL analysis.Moreover,one QTL peak which was flaked by two markers,marker2187260 to marker2173766,with LOD scores of 4.49 was detected.This QTL ranged from 0 to 40.79 cM on the top of linkage group(LG16).In addition one candidate molecular marker(marker2175442)in this QTL was identified,which was significant correlated with the flesh cyanidin-3-galactoside concentration.These genetic findings enrich the breeding basis of fruit flesh coloration in apple.Chengquan Yang Guangya Sha Tao Wei Baiquan Ma Cuiying Li Pengmin Li Yangjun Zou Lingfei Xu Fengwang Ma 2021Horticultural Plant Journal2021,7,5:4
6Identification of long noncoding RNAs involved in resistance to downy mildew in Chinese cabbage显示文摘Brassica downy mildew,a severe disease caused by Hyaloperonospora brassicae,can cause enormous economic losses in Chinese cabbage(Brassica rapa L.ssp.pekinensis)production.Although some research has been reported recently concerning the underlying resistance to this disease,no studies have identified or characterized long noncoding RNAs involved in this defense response.In this study,using high-throughput RNA sequencing,we analyzed the disease-responding mRNAs and long noncoding RNAs in two resistant lines(T12–19 and 12–85)and one susceptible line(91–112).Clustering and Gene Ontology analysis of differentially expressed genes(DEGs)showed that more DEGs were involved in the defense response in the two resistant lines than in the susceptible line.Different expression patterns and proposed functions of differentially expressed long noncoding RNAs among T12–19,12–85,and 91–112 indicated that each has a distinct disease response mechanism.There were significantly more cis-and trans-functional long noncoding RNAs in the resistant lines than in the susceptible line,and the genes regulated by these RNAs mostly participated in the disease defense response.Furthermore,we identified a candidate resistance-related long noncoding RNA,MSTRG.19915,which is a long noncoding natural antisense transcript of a MAPK gene,BrMAPK15.Via an agroinfiltration-mediated transient overexpression system and virus-induced gene silencing technology,BrMAPK15 was indicated to have a greater ability to defend against pathogens.MSTRG.19915-silenced seedlings showed enhanced resistance to downy mildew,probably because of the upregulated expression of BrMAPK15.This research identified and characterized long noncoding RNAs involved in resistance to downy mildew,laying a foundation for future in-depth studies of disease resistance mechanisms in Chinese cabbage.Bin Zhang Tongbing Su Peirong Li Xiaoyun Xin Yunyun Cao Weihong Wang Xiuyun Zhao Deshuang Zhang Yangjun Yu Dayong Li Shuancang Yu Fenglan Zhang 2021Horticulture Research2021,8,1:3
7Results of Clinical Trial of Superficially-placed Tumor Therapy with Carbon Ions at Heavy Ion Research Facility in Lanzhou(HIRFL显示文摘Zhang Hong Li Sha Wang Xiaohu Li Qiang Zhao Weiping Dai Zhongying Wei Shihua Gao Liying Xiao Guoqing Xu Hushan Hu Zhengguo Mao Ruishi Yue Yangjun Ran Juntao Tian Zhongze Song Mingtao Zhao Hongwei Zhan Wenlong 2007近代物理研究所和兰州重离子加速器实验室年报:英文版2007,,1:2
8First Clinical Trial of Cancer Therapy with Heavy Ions at IMP显示文摘Zhang Hong Li Sha Li Qiang Wei Shihua Hu Zhengguo Mao Ruishi Dai Zhongying Xu Hushan Tian Zhongze Yue Yangjun ZhaoWeiping Xiao Guoqing 2006近代物理研究所和兰州重离子加速器实验室年报:英文版2006,,1:2
9Improved adaptively robust estimation algorithm for GNSS spoofer considering continuous observation error显示文摘Once the spoofer has controlled the navigation sys-tem of unmanned aerial vehicle(UAV),it is hard to effectively control the error convergence to meet the threshold condition only by adjusting parameters of estimation if estimation of the spoofer on UAV has continuous observation error.Aiming at this problem,the influence of the spoofer’s state estimation error on spoofing effect and error convergence conditions is theoretically analyzed,and an improved adaptively robust estimation algo-rithm suitable for steady-state linear quadratic estimator is pro-posed.It enables the spoofer’s estimator to reliably estimate UAV status in real time,improves the robustness of the estima-tor in responding to observation errors,and accelerates the con-vergence time of error control.Simulation experiments show that the mean value of normalized innovation squared(NIS)is reduced by 88.5%,and the convergence time of NIS value is reduced by 76.3%,the convergence time of true trajectory error of UAV is reduced by 42.3%,the convergence time of estimated trajectory error of UAV is reduced by 67.4%,the convergence time of estimated trajectory error of the spoofer is reduced by 33.7%,and the convergence time of broadcast trajectory error of the spoofer is reduced by 54.8%when the improved algorithm is used.The improved algorithm can make UAV deviate from pre-set trajectory to spoofing trajectory more effectively and more subtly.GAO Yangjun LI Guangyun LYU Zhiwei ZHANG Lundong LI Zhongpan 2022Journal of Systems Engineering and Electronics2022,33,5:2
10Effects of pulse flow and leading edge sweep on mixed flow turbines for engine exhaust heat recovery显示文摘Recovery of heat energy from internal combustion engine exhaust will achieve significant road transportation CO2 reduction. Turbocharging and turbogenerating are most commonly used technologies to recover engine exhaust heat energy.Engine exhaust pulse flow can significantly affect the turbine performance of turbocharging and turbogenerating systems,and it is necessary to consider the pulse flow effects in turbine design and performance analysis.An investigation was carried out by numerical simulation on the mixed flow turbine pulse flow performance and flow fields.Results showed that the variations of the turbine efficiency and flowfiled under pulsating flow conditions demonstrate significant unsteady effects.The effect of blade leading edge sweep on turbine pulse flow performance was studied.It is shown that increasing of the leading edge sweep angle can improve the turbine average instantaneous efficiency by about 2 percent under pulsating flow conditions.ZHANG YangJun CHEN Li ZHUGE WeiLin ZHANG ShuYong 2011Science China(Technological Sciences)2011,54,2:1
11Genome-wide analysis of changes in miRNA and target gene expression reveals key roles in heterosis for chinese cabbage biomass显示文摘Heterosis is a complex phenomenon in which hybrids show better phenotypic characteristics than their parents do.Chinese cabbage(Brassica rapa L.spp.pekinensis)is a popular leafy crop species,hybrids of which are widely used in commercial production;however,the molecular basis of heterosis for biomass of Chinese cabbage is poorly understood.We characterized heterosis in a Chinese cabbage hybrid cultivar and its parental lines from the seedling stage to the heading stage;marked heterosis of leaf weight and biomass yield were observed.Small RNA sequencing revealed 63 and 50 differentially expressed microRNAs(DEMs)at the seedling and early-heading stages,respectively.The expression levels ofthe majority of miRNA clusters in the hybrid were lower than the mid-parent values(MPVs).Using degradome sequencing,we identi fied 1,819 miRNA target genes.Gene ontology(GO)analyses demonstrated that the target genes ofthe MPV-DEMs and low parental expression level dominance(ELD)miRNAs were signi ficantly enriched in leaf morphogenesis,leaf development,and leaf shaping.Transcriptome analysis revealed that the expression levels of photosynthesis and chlorophyll synthesis-related MPV-DEGs(differentially expressed genes)were signi ficantly different in the F_(1) hybrid compared to the parental lines,resulting in increased photosynthesis capacity and chlorophyll content in the former.Furthermore,expression of genes known to regulate leaf development was also observed at the seedling stage.Arabidopsis plants overexpressing BrGRF4.2 and bra-miR396 presented increased and decreased leaf sizes,respectively.These results provide new insight into the regulation of target genes and miRNA expression patterns in leaf size and heterosis for biomass of B.rapa.Peirong Li Tongbing Su Deshuang Zhang Weihong Wang Xiaoyun Xin Yangjun Yu Xiuyun Zhao Shuancang Yu Fenglan Zhang 2021Horticulture Research2021,8,1:1
12Structural relia- bility assessment based on probability and convex set mixed model 显示文摘LUO Yangjun KANG Zhan LI A 2009Computers and Structures2009,87,:1
13Structural reliability assessment based on probability and convex set mixed model 显示文摘Luo Yangjun Kang Zhan Li A 2009Computers and Structures2009,87,:1
14On non-probabilistic reliability-based design optimization of structures with uncertain-but-bounded parameters显示文摘Kang Zhan Luo Yangjun Li A 2011Structural Safety2011,33,:1
15Structural reliability assess- ment based on probability and convex set mixed model 显示文摘Luo Yangjun Kang Zhan Li Alex 2009Computers and Structures2009,87,2122:1
16Energy demand and carbon emissions under different development scenarios for Shanghai, China显示文摘Li Li Changhong Chen Shichen Xie Cheng Huang Zhen Cheng Hongli Wang Yangjun Wang Haiying Huang Jun Lu Shobhakar Dhakal 2009Energy Policy2009,,:1
17Genetic mapping and localization of a major QTL for seedling resistance to downy mildew in Chinese cabbage (Brassica rapa ssp. pekinensis)显示文摘Shuancang Yu Fenglan Zhang Renbo Yu Yanmin Zou Jiani Qi Xiuyun Zhao Yangjun Yu Deshuang Zhang Li Li 2009Molecular Breeding2009,,4:1
18Contracting Capacity and Perceived Contracting Performance: Nonlinear Effects and the Role of Time显示文摘Kaifeng YangJun Yi Hsieh and Tzung Shiun Li 2009Public Administration Review2009,,4:1
19Fatigue limits of shot-peened metals 显示文摘Wang Shengping Li Yangjun Yao Mei 1998J Mater Proc Tech1998,73,:1
20Artificial evolution of OsEPSPS through an improved dual cytosine and adenine base editor generated a novel allele conferring rice glyphosate tolerance显示文摘Exploiting novel endogenous glyphosate-tolerant alleles is highly desirable and has promising potential for weed control in rice breeding. Here,through fusions of different effective cytosine and adenine deaminases with nCas9-NG, we engineered an effective surrogate two-component composite base editing system, STCBE-2, with improved C-to-T and A-to-G base editing efficiency and expanded the editing window. Furthermore,we targeted a rice endogenous OsEPSPS gene for artificial evolution through STCBE-2-mediated near-saturated mutagenesis. After hygromycin and glyphosate selection, we identified a novel OsEPSPS allele with an Asp-213-Asn(D213N)mutation(OsEPSPS-D213N) in the predicted glyphosate-binding domain, which conferred rice plants reliable glyphosate tolerance and had not been reported or applied in rice breeding. Collectively, we developed a novel dual base editor which will be valuable for artificial evolution of important genes in crops. And the novel glyphosate-tolerant rice germplasm generated in this study will benefit weeds management in rice paddy fields.Chen Zhang Xue Zhong Shaoya Li Lei Yan Jingying Li Yubing He Yong Lin Yangjun Zhang Lanqin Xia 2023Journal of Integrative Plant Biology2023,65,9:1
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