Numerical and Practical Experiments of Acceleration-Level Fault-Tolerant Scheme for Redundant Manipulator MPaC

Huihui Gong,Ziyu Yin,Dechao Chen,Long Jin,Yunong Zhang 제어로봇시스템학회 2017 제어로봇시스템학회 국제학술대회 논문집 Vol.2017 No.10

A fault-tolerant scheme at the acceleration-level for motion planning and control (MPaC) of redundant manipulator is proposed and presented by incorporating the dimension-reduction method and neural-dynamics based quadratic program (QP) including solution. More importantly, numerical and practical experiments based on a six-link planar redundant robot manipulator are presented in this paper to substantiate the physical realizability, efficacy and accuracy of the fault-tolerant scheme for redundant manipulator MPaC and the neural-dynamics based QP.

Genome-Wide Identification and Functional Analysis of Long Non-coding RNAs in Sesame Response to Salt Stress

Gong Huihui,You Jun,Zhang Xiurong,Liu Yanzhong,Zhao Fengtao,Cui Xinxiao,Zhang Yujuan 한국식물학회 2021 Journal of Plant Biology Vol.64 No.6

Long non-coding RNAs (lncRNAs) play important roles in various biological regulatory processes in which complicated mechanisms are involved, as well as stress-responsive regulation. However, the number, characteristics, sequences and possible effects of lncRNAs in sesame response to salt stress are poorly understood. In this study, a total of 2482 lncRNAs were identified from two contrasting sesame genotypes under salt stress using high-throughput RNA sequencing, of which 599 were intergenic lncRNAs, 293 were antisense lncRNAs and 786 lncRNAs may encode proteins. Expression pattern analysis showed that most lncRNAs were expressed at a low level and a total of 700 differentially expressed lncRNAs were characterized as salt responsive in sesame. A large number of potential target genes of lncRNAs were predicted, and functional annotation analysis indicated that the differentially expressed lncRNAs in salt stress may regulate protein-coding genes involved in several important pathways related to glycolysis/gluconeogenesis, flavonoid biosynthesis, monoterpenoid biosynthesis, biotin metabolism, galactose metabolism, cyanoamino acid metabolism and carotenoid biosynthesis. Integrated analysis of lncRNAs and mRNAs revealed the regulatory role of lncRNAs associated with salt resistance in sesame, and provided convincing proof of the interplay of specific candidate target genes with lncRNAs. Our results indicated that a comprehensive set of lncRNAs with potential target genes were responsive to salt stress in sesame seedlings. These findings provided important information on salinity responses and adaptation of sesame to salt stress and may constitute useful resources for more comprehensive studies on gene regulation in sesame.

Retrotransposons - a Major Driving Force in Plant Genome Evolution and a Useful Tool for Genome Analysis

Zou, Jun,Gong, Huihui,Yang, Tae-Jin,Meng, Jinling 한국작물학회 2009 Journal of crop science and biotechnology Vol.12 No.1

As a major part of most plant genomes, retrotransposons are distributed throughout the plant genome ubiquitously with high copy number and extensive heterogeneity. Various retrotransposon families with distinct structures differ in their distribution and roles among divergent plant species, due to unforeseen transposition activities. Regulation of transposition is relatively complex and three factors such as maintaining structure for none- or cis- or trans-acting transposition, being controlled by the host genome and induction by biotic and abiotic stress may contribute altering its transposition activity. The important roles of retrotransposons to modify genome size, remodel genome structure, and displace gene functions in the plant genome have been proven by a growing number of research studies till date, which indicates that retrotransposons are important driving force in genome evolution. For this review, we summarized the latest theoretic and practical research progresses on plant retrotransposons for their distribution, regulation of activity, the impact on the architecture of plant genomes, and put forward the future prospects.

Retrotransposons- a Major Driving Force in Plant Genome Evolution and a Useful Tool for Genome Analysis

Jun Zou,Huihui Gong,Tae-Jin Yang,Jinling Meng 한국작물학회 2009 Journal of crop science and biotechnology Vol.12 No.1

As a major part of most plant genomes, retrotransposons are distributed throughout the plant genome ubiquitously with high copy number and extensive heterogeneity. Various retrotransposon families with distinct structures differ in their distribution and roles among divergent plant species, due to the unforeseen transposition activities. Regulation of transposition is relatively complex and three factors such as maintaining structure for none- or cis- or trans-acting transposition, control by host genome and induction by biotic and abiotic stress may contribute altering its transposition activity. The important roles of retrotransposons to modify genome size, remodel genome structure, and displace gene functions in the plant genome have been proven by a growing number of research studies up to now, which indicates that retrotransposons are a great driving force in genome evolution. For this review, we summarized the latest theoretic and practical research progress on plant retrotransposons for their distribution, regulation of activity, the impact on the architecture of plant genomes, and put forward the future prospects. As a major part of most plant genomes, retrotransposons are distributed throughout the plant genome ubiquitously with high copy number and extensive heterogeneity. Various retrotransposon families with distinct structures differ in their distribution and roles among divergent plant species, due to the unforeseen transposition activities. Regulation of transposition is relatively complex and three factors such as maintaining structure for none- or cis- or trans-acting transposition, control by host genome and induction by biotic and abiotic stress may contribute altering its transposition activity. The important roles of retrotransposons to modify genome size, remodel genome structure, and displace gene functions in the plant genome have been proven by a growing number of research studies up to now, which indicates that retrotransposons are a great driving force in genome evolution. For this review, we summarized the latest theoretic and practical research progress on plant retrotransposons for their distribution, regulation of activity, the impact on the architecture of plant genomes, and put forward the future prospects.

<i>De novo</i> genetic variation associated with retrotransposon activation, genomic rearrangements and trait variation in a recombinant inbred line population of <i>Brassica napus</i> derived from interspecific hybridization with <i>Brassica rapa</i>

Zou, Jun,Fu, Donghui,Gong, Huihui,Qian, Wei,Xia, Wei,Pires, J. Chris,Li, RuiYuan,Long, Yan,Mason, Annaliese S.,Yang, Tae‐,Jin,Lim, Yong P.,Park, Beom S.,Meng, Jinling Blackwell Publishing Ltd 2011 The Plant journal Vol.68 No.2

<P><B>Summary</B></P><P>Interspecific hybridization is a significant evolutionary force as well as a powerful method for crop breeding. Partial substitution of the AA subgenome in <I>Brassica napus</I> (A<SUP>n</SUP>A<SUP>n</SUP>C<SUP>n</SUP>C<SUP>n</SUP>) with the <I>Brassica rapa</I> (A<SUP>r</SUP>A<SUP>r</SUP>) genome by two rounds of interspecific hybridization resulted in a new introgressed type of <I>B.?napus</I> (A<SUP>r</SUP>A<SUP>r</SUP>C<SUP>n</SUP>C<SUP>n</SUP>). In this study, we construct a population of recombinant inbred lines of the new introgressed type of <I>B.?napus</I>. Microsatellite, intron‐based and retrotransposon markers were used to characterize this experimental population with genetic mapping, genetic map comparison and specific marker cloning analysis. Yield‐related traits were also recorded for identification of quantitative trait loci (QTLs). A remarkable range of novel genomic alterations was observed in the population, including simple sequence repeat (SSR) mutations, chromosomal rearrangements and retrotransposon activations. Most of these changes occurred immediately after interspecific hybridization, in the early stages of genome stabilization and derivation of experimental lines. These novel genomic alterations affected yield‐related traits in the introgressed <I>B.?napus</I> to an even greater extent than the alleles alone that were introgressed from the A<SUP>r</SUP> subgenome of <I>B.?rapa</I>, suggesting that genomic changes induced by interspecific hybridization are highly significant in both genome evolution and crop improvement.</P>

Fabrication and properties of Al2O3-Al cermet materials using different raw material composition parameter

Jieguang Song,Yue Liu,Chunxiao Wu,Xueqing Yang,Yipeng Gong,Jianzhen Huang,Chunyan He,Huihui Luo,Aixia Chen 한양대학교 세라믹연구소 2020 Journal of Ceramic Processing Research Vol.21 No.1

Cermet application is extensive because it retains the characteristics of ceramic materials and has the advantages of metalmaterials. In this paper, alumina/aluminum cermet materials were prepared through powder metallurgy method. Theinfluence of raw material formula on the properties of alumina/aluminum cermet was investigated on the basis that ceramicmaterials have good wear resistance and high thermal conductivity. Results show that when the mass ratio of alumina toaluminum is 1:3, the prepared cermet samples have excellent properties, highest density, and uniform distribution ofaluminum and alumina. MgO addition exhibits better effect, higher degree of densification, and renders higher hardness andstrength for the sample as compared with SiO2 and Y2O3 addition. The sintered cermet with composite powder prepared viaprecipitation has better properties and higher densities and surface hardness than that prepared via the ball mill method. Therelative density was 97.1%, surface hardness was 875 HV, and electric resistance was 0.0169 Ω·m.