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Removal of Stripes in Remote Sensing Images Based on Statistics Combined with Image Enhancement
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作者 Xiaofei QU Weiwei ZHAO +2 位作者 En LONG Meng SUN Guangling LAI 《Journal of Geodesy and Geoinformation Science》 CSCD 2023年第1期76-87,共12页
A method to remove stripes from remote sensing images is proposed based on statistics and a new image enhancement method.The overall processing steps for improving the quality of remote sensing images are introduced t... A method to remove stripes from remote sensing images is proposed based on statistics and a new image enhancement method.The overall processing steps for improving the quality of remote sensing images are introduced to provide a general baseline.Due to the differences in satellite sensors when producing images,subtle but inherent stripes can appear at the stitching positions between the sensors.These stitchingstripes cannot be eliminated by conventional relative radiometric calibration.The inherent stitching stripes cause difficulties in downstream tasks such as the segmentation,classification and interpretation of remote sensing images.Therefore,a method to remove the stripes based on statistics and a new image enhancement approach are proposed in this paper.First,the inconsistency in grayscales around stripes is eliminated with the statistical method.Second,the pixels within stripes are weighted and averaged based on updated pixel values to enhance the uniformity of the overall image radiation quality.Finally,the details of the images are highlighted by a new image enhancement method,which makes the whole image clearer.Comprehensive experiments are performed,and the results indicate that the proposed method outperforms the baseline approach in terms of visual quality and radiation correction accuracy. 展开更多
关键词 remote sensing images stripe removal STATISTICS image enhancement
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基于Stripes的在线测试系统的设计与开发 被引量:1
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作者 郭超 《软件》 2013年第9期49-50,共2页
本文首先介绍了在线测试系统的研究意义及现存的问题,在经典测试理论的基础上,阐述了整个系统的设计思想、技术路线、开发平台的选择、系统总体框架、实现的功能以及具体的实现方法。以"大学英语"课程为例,对基于Stripes框架... 本文首先介绍了在线测试系统的研究意义及现存的问题,在经典测试理论的基础上,阐述了整个系统的设计思想、技术路线、开发平台的选择、系统总体框架、实现的功能以及具体的实现方法。以"大学英语"课程为例,对基于Stripes框架的在线测试系统进行了开发。 展开更多
关键词 stripes 在线测试 外语教学
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基于Stripes框架的Ajax应用与研究
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作者 马成贵 管群 《计算机技术与发展》 2012年第1期5-8,共4页
Web 2.0时代已经到来,而如何能让Web2.0网站有更好的用户体验以及更快的数据传输一直是开发者所面临的重要问题。Ajax作为Web2.0中的一个关键技术,其在提高用户体验、减少网络传输方面有着无可替代的作用;而另一个新生的MVC框架Stripes... Web 2.0时代已经到来,而如何能让Web2.0网站有更好的用户体验以及更快的数据传输一直是开发者所面临的重要问题。Ajax作为Web2.0中的一个关键技术,其在提高用户体验、减少网络传输方面有着无可替代的作用;而另一个新生的MVC框架Stripes,以其配置文件少、学习周期短,也正成为Java开发者的宠儿。正是基于此,文中提出了一种整合Stripes+Ajax的架构,目的是让开发人员以最快最简洁的方式进行Ajax开发,同时文中还提出了Stripes在Ajax中的多种数据传输格式,提出了多种Ajax数据传输方案。 展开更多
关键词 stripes框架 AJAX技术 WEB 2.0 Jquery库 JAVASCRIPT 对象符号
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A morphology-stitching method to improve Landsat SLC-off images with stripes 被引量:2
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作者 Aghamohamadnia M Abedini A 《Geodesy and Geodynamics》 2014年第1期27-33,共7页
Stripes are artifacts in satellite images caused by various factors such as hardware defects. In some cases, these artifacts are introduced by some mitigating algorithms like Landsat SLC-off (Scan Line Corrector) ga... Stripes are artifacts in satellite images caused by various factors such as hardware defects. In some cases, these artifacts are introduced by some mitigating algorithms like Landsat SLC-off (Scan Line Corrector) gap-filling methods of LLHM (Local Linear Histogram Matching) and AWLHM (Adaptive Window Linear Histogram Matching), which leave stripes as a byproduct. To improve Landsat SLC-off images with stripes,we propose an algorithm involving some hypothetical stripe-crossing stitch lines using the mean pixel value of the stitch lines. 展开更多
关键词 SLC-off STRIPE data analysis morphology stitching LANDSAT LLHM AWLHM
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Research on the Dark Stripes Extraction Algorithm for Measuring Diameter with Diffraction 被引量:1
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作者 Quan Liu Fenglin Wei 《Optics and Photonics Journal》 2013年第2期53-56,共4页
The optical diffraction is a major means of minute diameter measurements. Since the light intensity of the diffraction fringe, mainly distributed in the central bright stripes, and that will lead to a relatively low S... The optical diffraction is a major means of minute diameter measurements. Since the light intensity of the diffraction fringe, mainly distributed in the central bright stripes, and that will lead to a relatively low SNR for the signal of the senior stripes. The traditional dark stripes extraction algorithm affected greatly by the noise. So this paper presents an algorithm that could effectively eliminate the gross errorcaused by the noise. Than by curve fitting the local signal of the diffraction pattern with the least square principle, the system could achieve a high measurement precision. 展开更多
关键词 DIFFRACTION DIAMETER Measurement DARK stripes Extract Least SQUARES FITTING
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Simulating to Formation of Stripes in Migmatite under Directional Pressure Using Stochastic Cellular Automaton
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作者 Li Caiwei(Institute of Geochemistry, China University of Geosciences, Wuhan 430074)Wu Jinping(Department of APPlied Chemistry, China University of Geosciences, Wuhan 430074)Chen Nengsong(Faculty of Earth Sciences, China University of Geosciences, Wuhan 43 《Journal of Earth Science》 SCIE CAS CSCD 1996年第2期156-160,共5页
There are some different opinions on the formation of striped migmatite. Many striped migmatites are distributed around the plutonic rocks in the core of hot dome in nature. This shows that the pressure of intrusive r... There are some different opinions on the formation of striped migmatite. Many striped migmatites are distributed around the plutonic rocks in the core of hot dome in nature. This shows that the pressure of intrusive rocks to wall rocks must play an important role in the formation of stripes. This paper, at first, discusses the effects of directional pressure (i. e. compressive stress from intrusive rock to wall rock) on particle migration and crystallization, and the physical mechanism of Ostwald maturation and its adjusting effect in crystalline growth. And then, on the basic principles of physics and chemistry, we lay down the stochastic evolutional rules of the formation of crystal nucleus, diffusion, crystallization and dissolution of leucosome (melt) particles; and,neglecting other restrictive conditions, we build an idealizedly simplified two-dimensional model of stochastic cellular automaton for the recrystallization of metamorphic rock under directional pressure, and realize it by writing a program of Windows on PC. Theoretical analyses and computer simulations show that, at the beginning, the free particles of leucosome are initially even distributed in the system and form many crystal nucleus ; then, the anisotropies of diffusion, crystallization and dissolution caused by the directional pressure together with the mechanisms of Ostwald maturation can make the nucleus successively grow to form lenses, unevenly disconnected stripes, and layer-stripe structure, which correspond to low, medium and high grades of metamorphism and migmatization, respectively; that is, the effect of the pressure of intrusive rock to wall rock alone can form streaked structure in migmatite. Moreover, cellular automaton, adopted in this paper, is a kind of discrete and local grid dynamic model, and is extremely suitable for simulating the evolution of spatiotemporal structure of real systems and analyzing micro-mechanism creating complex macro-phenomenon. We believe that cellular automata will have broad applications in the geosciences which is full of complicated natural phenomena. 展开更多
关键词 cellular automaton striped migmatite directional pressure anisotropy crystallization Ostwald maturation computer simulation
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Characteristic Analysis and Comprehensive Control for the Horizontal Stripes of High-Grade Automotive Panels in Continuous Annealing
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作者 Zhenhua Bai Xiaodong Shi +3 位作者 Yanzhi Shen Hongxin Si Li Zhou Shunbing Yu 《Engineering(科研)》 2011年第2期97-104,共8页
As to the horizontal stripes defect which exist on the surface of the high-grade automotive panels in continuous annealing process, an effective comprehensive control method is proposed on the basis of full considerat... As to the horizontal stripes defect which exist on the surface of the high-grade automotive panels in continuous annealing process, an effective comprehensive control method is proposed on the basis of full consideration of the equipment and technological features of continuous annealing line. With five field tests as basis, the generation mechanism of the defect was analysised in detail and the comprehensive control measures were put forward. According to actual situation, a detailed technical plan was worked out .Then the relevant technologies were applied to a 1850 continuous annealing line. The statistics shows that this program acquired good effects. The incidence of horizontal stripes defect decreased from 100% to 2.78%. Meanwhile, the surface quality of strip also improved effectively, which created a larger economic benefit. 展开更多
关键词 HIGH-GRADE AUTOMOTIVE PANELS Continuous Annealing HORIZONTAL stripes FURNACE Roller Surface Quality
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Dynamics of the inner electron radiation belt:A review 被引量:1
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作者 YuXuan Li Chao Yue +3 位作者 Ying Liu Qiu-Gang Zong Hong Zou YuGuang Ye 《Earth and Planetary Physics》 EI CSCD 2023年第1期109-118,共10页
The Van Allen radiation belts are an extraordinary science discovery in the Earth magnetosphere and consist of two electron belts.The inner Van Allen belt contains electrons of 10s to 100s keV;the outer belt consists ... The Van Allen radiation belts are an extraordinary science discovery in the Earth magnetosphere and consist of two electron belts.The inner Van Allen belt contains electrons of 10s to 100s keV;the outer belt consists mainly of 0.1-10 MeV electrons.Their dynamics have been analyzed for decades.The newly-launched Van Allen Probes provide unprecedented opportunities to investigate the inner belt more thoroughly.Data from this advanced mission have allowed scientists to demonstrate that the inner belt was formed not only through inward transport of outer belt electrons but Cosmic Ray Albedo Neutron Decay(CRAND)has also played an important role.In addition,the inner belt electrons show energy-dependent variations and present“zebra stripe”structures in the energy spectrum.At the same time,scientists have further confirmed that the electrons in the inner radiation belt get lost through coulomb collision and wave-particle interaction.Despite these advances,important questions remain unanswered and require further investigation.The launch of Macao Science Satellite-1 mission,with its low inclination angle and low altitude orbit,will provide advanced radiation belt data for better understanding of the structure and dynamics of the inner electron radiation belt. 展开更多
关键词 Macao Scientific Satellite-1 mission zebra stripes inward transport CRAND coulomb collision wave-particle interaction
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The roles of R2R3-MYBs in regulating complex pigmentation patterns in flowers
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作者 Baoqing Ding 《Horticultural Plant Journal》 SCIE CAS CSCD 2023年第6期1067-1078,共12页
Pigmentation patterns are ubiquitous in nature.Visually striking pigmentation patterns are not only aesthetically appealing,but also crucial to pollinator interaction and plant fitness.The formation of complex floral ... Pigmentation patterns are ubiquitous in nature.Visually striking pigmentation patterns are not only aesthetically appealing,but also crucial to pollinator interaction and plant fitness.The formation of complex floral pigmentation patterns mainly relies on the spatiotemporal expression of R2R3-MYB transcription factors and is often associated with certain floral development programs,such as floral organ identity,symmetry,which likely provide key information to initiate the patterning.For a complex pigmentation pattern to form,at least a pair of activator and inhibitor is required,despite their interaction might vary depending on the system being investigated.The regulation of pigmentation pattern involves multiple molecular mechanisms,such as transcriptional regulation,small RNA,transposon-mediated gene silencing,and methylation of gene body.Identifying these regulators can be facilitated by using single-cell and spatial transcriptomics as well as innovative plant transformation technologies.Moreover,plant organ development and pigmentation patterns are often interdependent,but current methods of describing patterns are static.Therefore,more precise and quantitative measurements are needed to elucidate the developmental mechanisms underlying complex pigmentation patterns in flowers. 展开更多
关键词 Pattern formation REACTION-DIFFUSION PETALS Prepattern R2R3-MYB ANTHOCYANIN CAROTENOID stripes Spots
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Transcriptome analysis reveals different response of resistant and susceptible rice varieties to rice stripe virus infection
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作者 LIU Yu LIU Wen-wen +2 位作者 LI Li Frederic FRANCIS WANG Xi-feng 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2023年第6期1750-1762,共13页
Rice stripe disease,caused by rice stripe virus (RSV) which is transmitted by small brown planthopper (SBPH,Laodelphax striatellus Fallen),resulted in serious losses to rice production during the last 2 decades.Resear... Rice stripe disease,caused by rice stripe virus (RSV) which is transmitted by small brown planthopper (SBPH,Laodelphax striatellus Fallen),resulted in serious losses to rice production during the last 2 decades.Research on the molecular differences between resistant and susceptible rice varieties and the interaction between rice and RSV remains inadequate.In this study,RNA-Seq was used to analyze the transcriptomic differences between the resistant and susceptible rice varieties at different times post RSV infection.Through Gene Ontology (GO) annotation,the differentially expressed genes (DEGs) related to transcription factors,peroxidases,and kinases of 2 varieties at 3 time points were identified.Comparing these 2 varieties,the DEGs associated with these 3 GOs were numerically less in the resistant variety than in the susceptible variety,but the expression showed a significant up-or down-regulation trend under the conditions of|log_2(Fold change)|>0&P_(adj)<0.05 by significance analysis.Then through Kyoto Encyclopedia of Genes and Genomes (KEGG) annotation,DEGs involved in some pathways that have a contribution to disease resistance including plant hormone signal transduction and plant–pathogen interaction were found.The results showed that resistance responses regulated by abscisic acid (ABA) and brassinosteroids (BR) were the same for 2 varieties,but that mediated by salicylic acid (SA) and jasmonic acid (JA)/ethylene (ET) were different.The DEGs in resistant and susceptible varieties at the 3 time points were identified in both PAMP-triggered immunity (PTI) and Effector proteintriggered immunity (ETI),with that most of the unigenes of the susceptible variety were involved in PTI,whereas most of the unigenes of the resistant variety were involved in ETI.These results revealed the different responses of resistant and susceptible varieties in the transcription level to RSV infection. 展开更多
关键词 TRANSCRIPTOMICS resistance SUSCEPTIBILITY rice stripe virus(RSV) INFECTION
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Strip segmentation of oceanic internal waves in SAR images based on TransUNet
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作者 Kaituo Qi Hongsheng Zhang +2 位作者 Jiaojiao Lu Yinggang Zheng Zhouhao Zhang 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2023年第10期67-74,共8页
The development of oceanic remote sensing artificial intelligence has made possible to obtain valuable information from amounts of massive data.Oceanic internal waves play a crucial role in oceanic activity.To obtain ... The development of oceanic remote sensing artificial intelligence has made possible to obtain valuable information from amounts of massive data.Oceanic internal waves play a crucial role in oceanic activity.To obtain oceanic internal wave stripes from synthetic aperture radar(SAR)images,a stripe segmentation algorithm is proposed based on the TransUNet framework,which is a combination of U-Net and Transformer,which is also optimized.Through adjusting the number of Transformer layer,multi-layer perceptron(MLP)channel,and Dropout parameters,the influence of over-fitting on accuracy is significantly weakened,which is more conducive to segmenting lightweight oceanic internal waves.The results show that the optimized algorithm can accurately segment oceanic internal wave stripes.Moreover,the optimized algorithm can be trained on a microcomputer,thus reducing the research threshold.The proposed algorithm can also change the complexity of the model to adapt it to different date scales.Therefore,TransUNet has immense potential for segmenting oceanic internal waves. 展开更多
关键词 oceanic internal waves deep learning stripe segmentation synthetic aperture radar TransUNet
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Fine mapping and transcriptome sequencing reveal candidate genes conferring all-stage resistance to stripe rust on chromosome arm 1AL in Chinese wheat landrace AS1676
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作者 Xiu Yang Yunfeng Jiang +18 位作者 Xianghai Yu Haipeng Zhang Yuqi Wang Fangnian Guan Li Long Hao Li Wei Li Qiantao Jiang Jirui Wang Yuming Wei Jian Ma Houyang Kang Pengfei Qi Qiang Xu Meng Deng Yazhou Zhang Youliang Zheng Yonghong Zhou Guoyue Chen 《The Crop Journal》 SCIE CSCD 2023年第5期1501-1511,共11页
Stripe rust, caused by Puccinia striiformis f. sp. tritici(Pst), threatens wheat production worldwide, and resistant varieties tend to become susceptible after a period of cultivation owing to the variation of pathoge... Stripe rust, caused by Puccinia striiformis f. sp. tritici(Pst), threatens wheat production worldwide, and resistant varieties tend to become susceptible after a period of cultivation owing to the variation of pathogen races. In this study, a new resistance gene against Pst race CYR34 was identified and predicted using the descendants of a cross between AS1676, a highly resistant Chinese landrace, and Avocet S, a susceptible cultivar. From a heterozygous plant from a F7recombinant inbred line(RIL) population lacking the Yr18 gene, a near-isogenic line(NIL) population was developed to map the resistance gene. An allstage resistance gene, YrAS1676, was identified on chromosome arm 1AL via bulked-segregant exomecapture sequencing. By analyzing a large NIL population consisting of 6537 plants, the gene was further mapped to the marker interval between KA1A_485.36 and KA1A_490.13, spanning 485.36–490.13 Mb on1AL. A total of 66 annotated genes have been reported in this region. To characterize and predict the candidate gene(s), an RNA-seq was performed using NIL-R and NIL-S seedlings 3 days after CYR34 inoculation. Compared to NIL-S plants, NIL-R plants showed stronger immune reaction and higher expression levels of genes encoding pathogenesis-associated proteins. These differences may help to explain why NIL-R plants were more resistant to Pst race CYR34 than NIL-S plants. By combining fine-mapping and transcriptome sequencing, a calcium-dependent protein kinase gene was finally predicted as the potential candidate gene of YrAS1676. This gene contained a single-nucleotide polymorphism. The candidate gene was more highly expressed in NIL-R than in NIL-S plants. In field experiments with Pst challenge,the YrAS1676 genotype showed mitigation of disease damage and yield loss without adverse effects on tested agronomic traits. These results suggest that YrAS1676 has potential use in wheat stripe rust resistance breeding. 展开更多
关键词 Stripe rust All-stage resistance(ASR) BSE-Seq Transcriptome analyses Candidate genes
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Investigation of Aegilops umbellulata for stripe rust resistance,heading date,and the contents of iron,zinc,and gluten protein
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作者 SONG Zhong-ping ZUO Yuan-yuan +5 位作者 XIANG Qin LI Wen-jia LI Jian LIU Gang DAI Shou-fen YAN Ze-hong 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2023年第4期1258-1265,共8页
Aegilops umbellulata(UU)is a wheat wild relative that has potential use in the genetic improvement of wheat.In this study,46 Ae.umbellulata accessions were investigated for stripe rust resistance,heading date(HD),and ... Aegilops umbellulata(UU)is a wheat wild relative that has potential use in the genetic improvement of wheat.In this study,46 Ae.umbellulata accessions were investigated for stripe rust resistance,heading date(HD),and the contents of iron(Fe),zinc(Zn),and seed gluten proteins.Forty-two of the accessions were classified as resistant to stripe rust,while the other four accessions were classified as susceptible to stripe rust in four environments.The average HD of Ae.umbellulata was significantly longer than that of three common wheat cultivars(180.9 d vs.137.0 d),with the exception of PI226500(138.9 d).The Ae.umbellulata accessions also showed high variability in Fe(69.74-348.09 mg kg^(-1))and Zn(49.83-101.65 mg kg^(-1))contents.Three accessions(viz.,PI542362,PI542363,and PI554399)showed relatively higher Fe(230.96-348.09 mg kg^(-1))and Zn(92.46-101.65 mg kg^(-1))contents than the others.The Fe content of Ae.umbellulata was similar to those of Ae.comosa and Ae.markgrafii but higher than those of Ae.tauschii and common wheat.Aegilops umbellulata showed a higher Zn content than Ae.tauschii,Ae.comosa,and common wheat,but a lower content than Ae.markgrafii.Furthermore,Ae.umbellulata had the highest proportion of γ-gliadin among all the species investigated(Ae.umbellulata vs.other species=mean 72.11%vs.49.37%;range:55.33-86.99%vs.29.60-67.91%).These results demonstrated that Ae.umbellulata exhibits great diversity in the investigated traits,so it can provide a potential gene pool for the genetic improvement of these traits in wheat. 展开更多
关键词 Aegilops umbellulata stripe rust resistance heading date Fe and Zn gluten proteins genetic variation
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Comparison of seismic fragility analysis methods for arch dams
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作者 Jin Aiyun Qiu Yixiang Wang Jinting 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2023年第1期173-189,共17页
This study focuses on the seismic fragility analysis of arch dams.The multiple stripe analysis(MSA),cloud analysis(CLA),and incremental dynamic analysis(IDA)methods are compared.A comprehensive dam-reservoir-foundatio... This study focuses on the seismic fragility analysis of arch dams.The multiple stripe analysis(MSA),cloud analysis(CLA),and incremental dynamic analysis(IDA)methods are compared.A comprehensive dam-reservoir-foundation rock system,which considers the opening of contraction joints,the nonlinearity of dam concrete and foundation rock,the radiation damping effect of semi-unbounded foundation,and the compressibility of reservoir water,is used as a numerical example.225,80,and 15 earthquake records are selected for MSA,CLA,and IDA,respectively.The results show that MSA provides satisfactory fragility analysis,while both CLA and IDA have assumptions that may lead to deviations.Therefore,MSA is the most reliable method among the three methods and is recommended for the fragility analysis of arch dams.It is also shown that the choice of demand level affects the reliability of fragility curves and the effect of the material uncertainty on the fragility of the dam is not significant. 展开更多
关键词 arch dam seismic fragility analysis cloud analysis incremental dynamic analysis multiple stripe analysis
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黄淮麦区小麦资源中高温抗条锈性品种的筛选(英文) 被引量:4
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作者 杨炜迪 陈宏灏 王美南 《Agricultural Science & Technology》 CAS 2008年第3期89-91,共3页
[Objective] The study aimed to screen wheat cultivars with high temperature resistance to stripe rust from the wheat resources in Huanghuai growth area. [Method] Seedlings of 165 wheat cultivars from Huanghuai growth ... [Objective] The study aimed to screen wheat cultivars with high temperature resistance to stripe rust from the wheat resources in Huanghuai growth area. [Method] Seedlings of 165 wheat cultivars from Huanghuai growth area were identified by wheat stripe rust under high temperature; then the wheat cultivars showing stripe rust at seedling stage were further used to identify the same resistance in field. [Results] 13 cultivars were proved to be stripe rust resistant under high temperature, and the expression stages of stripe rust in the 13 cultivars were revealed. The field identification results confirmed the identification results at seedling stage via inoculation of mixed stripe rust of physiological races. The stripe resistances of wheat cultivars were also proved to be non-race-specific. [Conclusion] Wheat resources in Huanghuai growth area are abundant in wheat cultivars with high temperature resistance to stripe rust. 展开更多
关键词 WHEAT High temperature disease resistance STRIPE RUST
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小麦条锈病气象等级预测方法研究(英文) 被引量:1
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作者 刘伟昌 陈怀亮 +3 位作者 王君 余卫东 张宏 刘忠阳 《Agricultural Science & Technology》 CAS 2008年第3期119-123,共5页
[Objective] The aim of this study is to establish the model for forecasting wheat stripe rust occurrence condition using meteorological factors. [Method] Based on the data of wheat stripe rust occurrence degrees in it... [Objective] The aim of this study is to establish the model for forecasting wheat stripe rust occurrence condition using meteorological factors. [Method] Based on the data of wheat stripe rust occurrence degrees in its past prevalent years and the meteorological data at corresponding periods, the methods of grey correlation analysis and fuzzy mathematics were employed to establish the forecast model for four pathogenesis indices according to the time sequence before winter, Early March, Early April and Middle May. Thus, the criterion for forecasting the occurrence degree of wheat stripe rust was obtained based on the distribution method of arithmetic progression. [Result] The model corresponding to meteorological conditions for forecasting wheat stripe rust was successfully established. According to the verification, the forecasting results before winter and in Early Mar. were more severer than the real occurrence condition, while the forecasting results in Early Apr. and Middle May were basically consistent with real values. [Conclusion] The results of the present study may avail the control of wheat stripe rust in Henan Province. 展开更多
关键词 Wheat STRIPE RUST GREY correlation Fuzzy MATHEMATICS PATHOGENESIS index
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水稻条纹病毒病害特异性蛋白基因克隆及其与纤细病毒属成员的亲缘关系分析 被引量:1
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作者 李凡 杨金广 +3 位作者 吴祖建 林奇英 陈海如 谢联辉 《植物病理学报》 CAS CSCD 北大核心 2005年第S1期135-136,共2页
由水稻条纹病毒(Rice stripe virus,RSV)引起的水稻条纹叶枯病于20世纪初始发于日本关中一带,1963年在我国苏、浙、沪一带首次爆发成灾,现已扩展蔓延到全国18个省、市、自治区的水稻种植区。从2000年该病害在江苏、河南等地再次爆发成灾... 由水稻条纹病毒(Rice stripe virus,RSV)引起的水稻条纹叶枯病于20世纪初始发于日本关中一带,1963年在我国苏、浙、沪一带首次爆发成灾,现已扩展蔓延到全国18个省、市、自治区的水稻种植区。从2000年该病害在江苏、河南等地再次爆发成灾,发病面积达50%以上,严重制约了当地的稻米生产,已成为该地区水稻主要病害之一。 RSV是纤细病毒属(Tenuivirus)的代表种,其 RNA4编码的病害特异性蛋白(disease specific pro- tein,SP)在病叶的积累量与病害症状的严重度存在密切的关系。本文对发生于云南和江苏不同稻区的RSV的SP基因进行了分子克隆和序列比较分析,并对纤细病毒属6种病毒之间的亲缘关系进行了分析。 展开更多
关键词 纤细病毒属 水稻条纹病毒 发病面积 特异性蛋白 水稻条纹叶枯病 序列比较分析 稻米生产 水稻种植区 STRIPE 基因克隆
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异构盘阵中最优Stripe Unit Size选择技术 被引量:1
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作者 刘军 杨学军 +1 位作者 唐玉华 王勇献 《计算机学报》 EI CSCD 北大核心 2004年第6期819-827,共9页
缓解计算机IO子系统瓶颈的有效手段是采用磁盘阵列 .配置时 ,SUS(StripeUnitSize)的选择对盘阵性能的影响非常关键 ,而以往对异构盘阵的SUS的选择研究较少 .该文推导出了确定异构盘阵最优SUS的方程 ,具体工作如下 :首先 ,该文采用close... 缓解计算机IO子系统瓶颈的有效手段是采用磁盘阵列 .配置时 ,SUS(StripeUnitSize)的选择对盘阵性能的影响非常关键 ,而以往对异构盘阵的SUS的选择研究较少 .该文推导出了确定异构盘阵最优SUS的方程 ,具体工作如下 :首先 ,该文采用close队列网络模型来描述异构盘阵负载 ;然后 ,从该模型推导出系统数据传输率解析表达式 .根据该表达式和异构盘阵中设备的特性 ,可求出使传输率最大的SUS .最后 ,研究中进行了大量的模拟试验 .模拟试验表明在并发的进程数大于 10时 ,所推导的结论与模拟结果非常吻合 . 展开更多
关键词 异构盘阵 磁盘性能 最优Stripe UNIT Size选择技术 磁盘阵列 close队列网络模型 模拟试验
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关于左C-wrpp半群的加细半格分解 被引量:2
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作者 张晓敏 《四川师范大学学报(自然科学版)》 CAS CSCD 北大核心 2007年第5期578-581,共4页
令S是左C-wrpp半群,κ是其上的等价关系,研究一类特殊左C-wrpp半群S的加细半格分解,即κ是S上的同余时,左C-wrpp半群S的加细半格分解,得到左C-wrpp半群的加细半格分解结构的等价刻画.
关键词 左C-wrpp半群 R-左消stripes 加细半格 织积
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镧系超导体中条纹相(stripe phase)的研究评述
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作者 路庆凤 杜保立 李喜贵 《河南师范大学学报(自然科学版)》 CAS CSCD 2004年第2期38-42,共5页
镧系超导体中,当掺杂空穴浓度等于1/8时出现的超导反常抑制现象一直是超导研究方面的一个焦点.J.M.Tranquada将La2-XSrXCuO4中出现的动态二唯无公度(incommensurate)自旋关联解释为电荷自旋相互分离的条纹相之后,人们对镧系超导体的电子... 镧系超导体中,当掺杂空穴浓度等于1/8时出现的超导反常抑制现象一直是超导研究方面的一个焦点.J.M.Tranquada将La2-XSrXCuO4中出现的动态二唯无公度(incommensurate)自旋关联解释为电荷自旋相互分离的条纹相之后,人们对镧系超导体的电子-电子、电子-晶格、以及磁相互作用进行了系统的研究.但条纹相形成的驱动机制以及条纹相与超导电性的关系等基本问题仍没有得到充分的解释. 展开更多
关键词 LMCO 高温超导 STRIPE PHASE 1/8超导反常现象
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