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Hierarchical micro-mobility management in high-speed multihop access networks

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The Journal of China Universities of Posts and Telecommunications 2006年第4期13卷 7-12页

作者： TANG bi-hua ma Xiao-lei LIU Yuan-an GAO Jin-chun School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

This article integrates the hierarchical micro-mobility management and the high-speed multihop access networks （HmaN）, to accomplish the smooth handover between different access reuters. The proposed soft handover scheme in the high-speed HmaN can solve the micro-mobility management problem in the access network. This article also proposes the hybrid access muter （AR） advertisement scheme and AR selection algorithm, which uses the time delay and stable route to the AR as the gateway selection parameters. By simulation, the proposed micro-mobility,management scheme can achieve high packet delivery fraction and improve the lifetime of network.

关键词： Ad-hoc networks hierarchical micro-mobility management wireless multihop access network

Genome-wide identification and expression analyses of cytochrome P450 genes in mulberry(Morus notabilis)

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Journal of Integrative Plant biology 2014年第9期56卷 887-901页

作者： bi ma Yiwei Luo Ling Jia Xiwu Qi Qiwei Zeng Zhonghuai Xiang Ningjia He State Key Laboratory of Silkworm Genome biology Southwest University

Cytochrome P450 S play critical roles in the biosynthesis of physiologically important compounds in *** compounds often act as defense toxins to prevent *** the present study,a total of 174 P450 genes of mulberry（Morus notabilis ***） were identified based on bioinformatics *** mulberry P450 genes were divided into nine clans and 47 families and were found to be expressed in a tissue-preferential *** genes were compared to the P450 genes in Arabidopsis *** CYP80,CYP92,CYP728,CYP733,CYP736,and CYP749 were found to exist in mulberry,and they may play important roles in the biosynthesis of mulberry secondary *** of the functional and metabolic pathways of these genes indicated that mulberry P450 genes may participate in the metabolism of lipids,other secondary metabolites,xenobiotics,amino acids,cofactors,vitamins,terpenoids,and *** results provide a foundation for understanding of the structures and biological functions of mulberry P450 genes.

关键词： Cytochrome P450 metabolism Morus notabilis pathway silkworm

Identification and characterization of genes involved in the jasmonate biosynthetic and signaling pathways in mulberry(Morus notabilis)

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Journal of Integrative Plant biology 2014年第7期56卷 663-672页

作者： Qing Wang bi ma Xiwu Qi Qing Guo Xuwei Wang Qiwei Zeng Ningjia He State Key Laboratory of Silkworm Genome biology Southwest University

Jasmonate （JA） is an important phytohormone regulating growth, development, and environmental response in plants, particularly defense response against herbivorous insects. Recently, completion of the draft genome of the mulberry （Morus notabilis） in conjunction with genome sequencing of silkworm （Bombyx mori） provides an opportuni-ty to study this unique plant-herbivore interaction. Here, we identified genes involved in JA biosynthetic and signaling pathways in the genome of mulberry for the first time, with the majority of samples showing a tissue-biased expression pattern. The analysis of the representative genes 12-oxophy-todienoic acid reductase （OPRs） and jasmonate ZIM-domain （JAZs） was performed and the results indicated that the mulberry genome contains a relatively smal number of JA biosynthetic and signaling pathway genes. A gene encoding an＆amp;nbsp;important repressor, MnNINJA, was identified as an alternative splicing variant lacking an ethylene-responsive element binding factor-associated amphiphilic repression motif. Having this fundamental information wil facilitate future functional study of JA-related genes pertaining to mulberry-silkworm interactions.

关键词： Jasmonate mulberry (Morus notabilis) pathway silkwormCitation: Wang Q, ma B, Qi x, Guo Q, wang x, zeng Q, He N (2014)Identification and characterization of genes involved in the jasmonatebiosynthetic and signaling pathways in mulberry (Morus notabilis). J

Dynamic changes in transposable element and gene methylation in mulberry (Morus notabilis) in response to Botrytis cinerea

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Horticulture Research 2021年第1期8卷 2149-2162页

作者： Youchao Xin bi ma Qiwei Zeng Wenmin He Meiling Qin Ningjia He State Key Laboratory of Silkworm Genome biology Southwest UniversityBeibeiChongqing 400715China College of Forestry Shandong Agricultural UniversityTaianShandong 271018China

DNA methylation has been proposed to regulate plant stress ***,the dynamic changes in DNA methylation in woody plants and their correlations with pathogenic responses are not fully ***,we present single-base maps of the DNA methylomes of mulberry(Morus notabilis)leaves that were subjected to a mock treatment or inoculation with Botrytis *** with the former,the latter showed decreased mCG and mCHG levels and increased mCHH *** methylation inhibitors reduced resistance gene methylation levels and enhanced mulberry resistance,suggesting that the hypomethylation of resistance genes affects mulberry resistance to ***-induced gene silencing of MnMET1 enhanced the expression of mulberry-resistance genes,thereby increasing the plant’s resistance to *** also found that MITEs play a dominant role in controlling DNA methylation *** appear to be the main sources of 24-nt siRNAs that regulate gene expression through the RNA-directed DNA methylation pathway.

关键词： resistance thereby latter

STRUCTURE AND FERROmaGNETIC RESONANCE OF Fe/Cu SUPERLATTICES

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维普期刊数据库

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Acta Metallurgica Sinica(English Letters) 1991年第8期4卷 127-133页

作者： bi Siyun ma Xiaoding SONG Ruitian MEI Liangmo ZHAO Jiangao GUO Yicheng Shandong University,Jinan,China Shandong Univ Jinan China

Metallic Fe/Cu superlattice films on glass substrates were prepared by a dc-magnetion sputtering *** modulation behaviors and the crystal structures of the films were ex- amined by X-ray diffraction and transmission electron microscopy(TEM)respectively. Their magnetic properties were studied by means of ferromagnetic resonnance spectrometer and the vibrating sample *** results show that there exists a strong magnetic coupling between the neighbouring Fe layers and it is the coupling that affectes the magnetic properties of these superlattice films.

关键词： superlattice ferromagnetic resonance interface spin-wave resonance

New Insights into Nested Long Terminal Repeat Retrotransposons in Brassica Species

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Molecular Plant 2013年第2期6卷 470-482页

作者： Lijuan Wei Meili Xiaoa Zeshan An bi ma Annaliese S. mason Wei Qian Jiana Li Donghui Fu Chongqing Engineering Research Center for Rapeseed College of Agronomy and Biotechnology Southwest University Chongqing 400716 China School of Agriculture and Food Sciences and centre for Integrative I~egume-Research The University of Queensland 1:he Universit'y of QueenslandBrisbane 4072 Australia Key Laboratory of Crop Physiology Ecology and Genetic Breeding Ministry of Education Agronomy College Jiangxi Agricultural University Nanchang330045 China

Long terminal repeat （LTR） retrotransposons, one of the foremost types of transposons, continually change or modify gene function and reorganize the genome through bursts of dramatic proliferation. many LTR-TEs preferen-tially insert within other LTR-TEs, but the cause and evolutionary significance of these nested LTR-TEs are not well under-stood. In this study, a total of 1.52 Gb of Brassica sequence containing 2020 bacterial artificial chromosomes （BACs） was scanned, and six bacterial artificial chromosome （BAC） clones with extremely nested LTR-TEs （LTR-TEs density： 7.24/kb） were selected for further analysis. The majority of the LTR-TEs in four of the six BACs were found to be derived from the rapid proliferation of retrotransposons originating within the BAC regions, with only a few LTR-TEs originating from the proliferation and insertion of retrotransposons from outside the BAC regions approximately 5-23 Mya. LTR-TEs also pref-erably inserted into TA-rich repeat regions. Gene prediction by Genescan identified 207 genes in the 0.84Mb of total BAC sequences. Only a few genes （3/207） could be matched to the Brassica expressed sequence tag （EST） database, indicating that most genes were inactive after retrotransposon insertion. Five of the six BACs were putatively centromeric. Hence, nested LTR-TEs in centromere regions are rapidly duplicated, repeatedly inserted, and act to suppress activity of genes and to reshuffle the structure of the centromeric sequences. Our results suggest that LTR-TEs burst and proliferate on a local scale to create nested LTR-TE regions, and that these nested LTR-TEs play a role in the formation of centromeres.

关键词： LTR retrotransposons Brassica centromere retrotransposon-rich transposon burst.

The gap-free genome of mulberry elucidates the architecture and evolution of polycentric chromosomes

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维普期刊数据库

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Horticulture Research 2023年第7期10卷 221-232页

作者： bi ma Honghong Wang Jingchun Liu Lin Chen Xiaoyu Xia Wuqi Wei Zhen Yang Jianglian Yuan Yiwei Luo Ningjia He State Key Laboratory of Resource Insects Southwest UniversityChongqing400715China

Mulberry is a fundamental component of the global sericulture industry,and its positive impact on our health and the environment cannot be ***,the mulberry reference genomes reported previously remained unassembled or unplaced ***,we report the assembly and analysis of the telomere-to-telomere gap-free reference genome of the mulberry species,Morus notabilis,which has emerged as an important reference in mulberry gene function research and genetic *** mulberry gap-free reference genome produced here provides an unprecedented opportunity for us to study the structure and function of *** results revealed that all mulberry centromeric regions share conserved centromeric satellite repeats with different ***,we found that *** is a species with polycentric chromosomes and the only reported polycentric chromosome species up to *** propose a compelling model that explains the formation mechanism of new centromeres and addresses the unsolved scientific question of the chromosome fusion-fission cycle in mulberry *** study sheds light on the functional genomics,chromosome evolution,and genetic improvement of mulberry species.

关键词： evolution free mulberry

Inaudible Sound Covert Channel with Anti-Jamming Capability: Attacks vs. Countermeasure

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维普期刊数据库

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Journal of Electronic Science and Technology 2022年第4期20卷 396-415页

作者： Xiao-Hang Wang Shou-bin Li Ying-Tao Jiang Amit Kumar Singh bi-Yun ma Le-Tian Huang Mei Yang Fen Guo School of Cyber Science and Technology Zhejiang UniversityHangzhou 310012 ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 310012 School of Software Engineering South China University of TechnologyGuangzhou 510006 Department of Electrical and Computer Engineering University of NevadaLas Vegas 89154 School of Computer Science and Electronic Engineering University of EssexColchester CO43SQ School of Electronics and Information Engineering South China University of TechnologyGuangzhou 510640 School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054

When an inaudible sound covert channel(ISCC)attack is launched inside a computer system,sensitive data are converted to inaudible sound waves and then *** receiver at the other end picks up the sound signal,from which the original sensitive data can be *** a forceful countermeasure against the ISCC attack,strong noise can be used to jam the channel and literally shut down any possible sound data *** this paper,enhanced ISCC is proposed,whose transmission frequency can be dynamically ***,if the transmitter detects that the covert channel is being jammed,the transmitter and receiver both will switch to another available frequency and re-establish their communications,following the proposed communications *** results show that the proposed enhanced ISCC can remain connected even in the presence of a strong jamming noise ***,a detection method based on frequency scanning is proposed to help to combat such an anti-jamming sound *** the proposed countermeasure,the bit error rate(BER)of the data communications over enhanced ISCC soars to more than 48%,essentially shutting down the data transmission,and thus neutralizing the security threat.

关键词： Countermeasure inaudible sound covert channel(ISCC)

Fujian Tulou:A Building Art of Earth

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China & The World Cultural Exchange 2008年第9期74卷 28-31页

作者： bi Yuan ma Jianhe

＂They are inscribed as exceptional examples of a building tradition and function exemplifying a particular type of communal living and defensive organization, and, in terms of their harmonious relationship with their... 详细信息

关键词：福建土楼建筑艺术建筑