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Search Results: 1 - 10 of 26726 matches for " Genhua Jin "
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Early Termination and Pipelining for Hardware Implementation of Fast H.264 Intraprediction Targeting Mobile HD Applications
Jin-Su Jung,Genhua Jin,Hyuk-Jae Lee
EURASIP Journal on Advances in Signal Processing , 2008, DOI: 10.1155/2008/542735
Abstract: H.264/AVC adopts aggressive compression algorithms at the cost of increased computational complexity. To speed up the H.264/AVC intraframe coding, this paper proposes two novel techniques: early termination and pipelined execution. In P slices, intra 4 —4 and 16 —16 predictions are early terminated with the threshold determined by the cost of motion estimation. In I slices, intra 4 —4 prediction is early terminated with the threshold derived from intra 16 —16 prediction. The threshold function is chosen as a monotonically decreasing linear function with its optimal coefficients determined by experiments. For the pipelined execution of 4 —4 intrapredictions, the processing order of 4 —4 blocks is changed to reduce the dependencies between consecutively processed blocks. In I slices, computation for 4 —4 intraprediction is reduced by 19 percent with the proposed early termination. In P slices, computations for 4 —4 and 16 —16 intrapredictions are reduced by more than 81 and 91 percents, respectively. The pipelined execution reduces the computation time by 41 percent. In spite of the speed-up by the proposed methods, degradation in rate-distortion performance is negligible. The proposed pipelined execution is integrated with other H.264/AVC hardware accelerators and fabricated as an SoC using Dongbu 0.13 ¢ € ‰ m technology.
PRODUCING JOINT POLYGONS, CUTTING JOINT BLOCKS AND FINDING KEY BLOCKS FOR GENERAL FREE SURFACES
一般自由面上多面节理生成、节理块切割与关键块搜寻方法

SHI Genhua,
石根华

岩石力学与工程学报 , 2006,
Abstract: This paper describes a process of cutting blocks from statistically generated finite joint polygons in 3D space. If the ratio of joint length divided by joint spacing is less than 10, the rock mass is likely connected. If this joint length ratio is greater than 10, the rock is likely to be blocky. An algorithm is also presented for finding all removable blocks along any given moving direction. The rock mass boundary can be any excavated and natural free surfaces. The algorithm works for both joint sets and for any joint system where each joint has its own direction. This is an application of polygon cutting code DC of 3D DDA.
Bis{4-chloro-N′-[phenyl(2-pyridyl)methylidene]benzohydrazidato-κ2N′,O}cobalt(III) nitrate methanol disolvate
Genhua Wu,Hui Ye,Dayu Wu
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810032241
Abstract: In the title compound, [Co(C19H13ClN3O)2]NO3·2CH3OH, the central CoIII atom in the cation is surrounded by two tridentate ligands in a distorted octahedral fashion by four N and two O atoms. Classical O—H...O hydrogen bonds link both methanol solvent molecules with the nitrate anion.
Poly[[chloridodimethanol(μ3-pyridine-2,3-dicarboxylato)europium(III)] methanol monosolvate]
Dayu Wu,Liyang Chen,Genhua Wu
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812017862
Abstract: The asymmetric unit of the title compound, {[Eu(C7H3NO4)Cl(CH3OH)2]·CH3OH}n, contains one EuIII ion, one pyridine 2,3-dicarboxylate dianion (PDC), two CH3OH molecules coordinating to the metal atom, one coordinating chloride and one lattice occluded CH3OH molecule. In the crystal, each PDC anion coordinates to three adjacent EuIII ions by the pyridine N and O atoms of the carboxylate groups. The EuIII cation is eightfold coordinated by four carboxylate O atoms, one pyridine N atom, two MeOH and one chloride anion in the form of a distorted polyhedron. Extended coordination of the PDC ligand lead to the formation of a two-dimensional coordination polymer parallel to (10-1).
Endomorphism algebras arising from mutations
Genhua Pei,Hongbo Yin,Shunhua Zhang
Mathematics , 2012,
Abstract: Let $A$ be a finite dimensional algebra over an algebraically closed field $k$, $\mathcal {D}^b(A)$ be the bounded derived category of $A$-mod and $A^{(m)}$ be the $m$-replicated algebra of $A$. In this paper, we investigate the structure properties of endomorphism algebras arising from silting mutation in $\mathcal {D}^b(A)$ and tilting mutation in $A^{(m)}$-mod.
Responses of Jatropha curcas to Salt and Drought Stresses
Genhua Niu,Denise Rodriguez,Mike Mendoza,John Jifon,Girisha Ganjegunte
International Journal of Agronomy , 2012, DOI: 10.1155/2012/632026
Abstract: Two greenhouse experiments were conducted to quantify growth responses of Jatropha curcas to a range of salt and drought stresses. Typical symptoms of salinity stress such as leaf edge yellowing were observed in all elevated salinity treatments and the degree of the foliar salt damage increased with the salinity of irrigation water. Total dry weight (DW) of Jatropha plants was reduced by 30%, 30%, and 50%, respectively, when irrigated with saline solutions at electrical conductivity of 3.0, 6.0, and 9.0?dS compared to that in the control. Leaf concentration was much higher than that observed in most glycophytes. Leaf concentrations were also high. In the drought stress experiment, plants were irrigated daily with nutrient solution at 100%, 70%, 50%, or 30% daily water use (DWU). Deficit irrigation reduced plant growth and leaf development. The DW of leaves, roots, and total were reduced in the 70%, 50%, and 30% DWU compared to the 100% DWU control treatment. In summary, salinity stress and deficit irrigation significantly reduced the growth and leaf development of greenhouse-grown Jatropha plants. 1. Introduction Jatropha (Jatropha curcas L.) is a multipurpose shrub (Family Euphorbiaceae) that is native to tropical America but now thrives in many parts of the tropics and subtropics in Africa and Asia [1, 2]. J. curcas grows well in lands with low-rainfall harsh climatic conditions and can alleviate soil degradation, desertification, and deforestation [3, 4]. While Jatropha grows well in low-rainfall conditions, requiring only about 200?mm, it can also respond to higher rainfall up to 1200?mm, particularly in hot climatic conditions [5]. Jatropha plants can withstand extremely low humidity in the air and can tolerate long-term drought stress by shielding most of its leaves to reduce transpiration [5]. Due to the above mentioned characteristics, Jatropha has received special attention in many countries and is one of the main crops to be promoted for growing in marginal lands for biodiesel production [5, 6]. To avoid the competition with food production, marginal and wasteland are targeted for producing bioenergy crops. Marginal lands are most likely located in the arid and semiarid regions in many parts of the world where high quality water supply is not available or extremely limited. Marginal lands are characterized with high soil salinity, low fertility, and limited supply of high quality of water. Before exploiting any plant for commercial production in a marginal land, it is imperative to investigate if the selected plants can survive and grow at a
Molecular Cloning and Copy Number Variation of a Ferritin Subunit (Fth1) and Its Association with Growth in Freshwater Pearl Mussel Hyriopsis cumingii
Zhiyi Bai, Yiming Yuan, Genhua Yue, Jiale Li
PLOS ONE , 2011, DOI: 10.1371/journal.pone.0022886
Abstract: Iron is one of the most important minor elements in the shells of bivalves. This study was designed to investigate the involvement of ferritin, the principal protein for iron storage, in shell growth. A novel ferritin subunit (Fth1) cDNA from the freshwater pearl mussel (Hyriopsis cumingii) was isolated and characterized. The complete cDNA contained 822 bp, with an open reading frame (ORF) of 525 bp, a 153 bp 5′ untranslated region (UTR) and a 144 bp 3′ UTR. The complete genomic DNA was 4125 bp, containing four exons and three introns. The ORF encoded a protein of 174 amino acids without a signal sequence. The deduced ferritin contained a highly conserved motif for the ferroxidase center comprising seven residues of a typical vertebrate heavy-chain ferritin. It contained one conserved iron associated residue (Try27) and iron-binding region signature 1 residues. The mRNA contained a 27 bp iron-responsive element with a typical stem-loop structure in the 5′-UTR position. Copy number variants (CNVs) of Fth1 in two populations (PY and JH) were detected using quantitative real-time PCR. Associations between CNVs and growth were also analyzed. The results showed that the copy number of the ferritin gene of in the diploid genome ranged from two to 12 in PY, and from two to six in JH. The copy number variation in PY was higher than that in JH. In terms of shell length, mussels with four copies of the ferritin gene grew faster than those with three copies (P<0.05), suggesting that CNVs in the ferritin gene are associated with growth in shell length and might be a useful molecular marker in selective breeding of H. cumingii.
Inhibiting miRNA in Caenorhabditis elegans using a potent and selective antisense reagent
Genhua Zheng, Victor Ambros, Wen-hong Li
Silence , 2010, DOI: 10.1186/1758-907x-1-9
Abstract: We have developed a new class of fluorescently labelled antisense reagents to inhibit miRNAs in developing worms. These reagents were synthesized by conjugating dextran with 2'-O-methyl oligoribonucleotide. The dextran-conjugated antisense reagents can be conveniently introduced into the germline of adult hermaphrodites and are transmitted to their progeny, where they efficiently and specifically inhibit a targeted miRNA in different tissues, including the hypodermis, the vulva and the nervous system. We show that these reagents can be used combinatorially to inhibit more than one miRNA in the same animal.This class of antisense reagents represents a new addition to the toolkit for studying miRNA in C. elegans. Combined with numerous mutants or reporter stains available, these reagents should provide a convenient approach to examine genetic interactions that involve miRNA, and may facilitate studying functions of miRNAs, especially ones whose deletion strains are difficult to generate.See related research article: http://jbiol.com/content/9/3/20 webciteMicroRNAs (miRNAs) are single strand RNA molecules ~ 21-23 nucleotides long that play important roles in many biological processes through regulating gene expression [1]. In animal cells, miRNAs act primarily by inhibiting mRNA translation and/or stability through a process involving partial complementary base-pairing with sequences at the 3'-untranslated region (3' UTR). Numerous miRNAs have been identified. To study their functions, antisense reagents against miRNAs have been developed as a reverse genetics tool. Synthetic oligonucleotide analogues, including 2'-O-methyl oligoribonucleotides [2], locked nucleic acids [3], 2'-O-methoxyethyl oligoribonucleotides [4], and morpholinos [5], have been tested. These antisense nucleotide analogues have been used to knock down miRNAs in cultured cells [2-4] and in live animals including zebrafish [5], D. melanogaster [6] and mice [7].Caenorhabditis elegans has long been used
Bis[4-chloro-N′-(2-pyridylmethylidene)benzohydrazidato]cobalt(III) nitrate sesquihydrate
Dayu Wu,Yan Zhao,Hui Ye,Genhua Wu
Acta Crystallographica Section E , 2010, DOI: 10.1107/s160053681004612x
Abstract: In the title compound, [Co(C13H9ClN3O)2]NO3·1.5H2O, the central Co3+ atom in the cation is coordinated by four N and two O atoms from the two tridentate ligands in a distorted octahedral fashion. In the crystal, the cobalt complex cations are linked to the half-occupied and the fully occupied water molecules, and the nitrate anion via classical intermolecular O—H...O and O—H...N hydrogen bonds and weak C—H...O contacts.
Spin-inversion in nanoscale graphene sheets with a Rashba spin-orbit barrier
Somaieh Ahmadi,Mahdi Esmaeilzadeh,Esmaeil Namvar,Genhua Pan
AIP Advances , 2012, DOI: 10.1063/1.3684600
Abstract: Spin-inversion properties of an electron in nanoscale graphene sheets with a Rashba spin-orbit barrier is studied using transfer matrix method. It is found that for proper values of Rashba spin-orbit strength, perfect spin-inversion can occur in a wide range of electron incident angle near the normal incident. In this case, the graphene sheet with Rashba spin-orbit barrier can be considered as an electron spin-inverter. The efficiency of spin-inverter can increase up to a very high value by increasing the length of Rashba spin-orbit barrier. The effect of intrinsic spin-orbit interaction on electron spin inversion is then studied. It is shown that the efficiency of spin-inverter decreases slightly in the presence of intrinsic spin-orbit interaction. The present study can be used to design graphene-based spintronic devices.
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