关键词：
list scheduling;arbitrary processor network;DAG;communication contention;parallel algorithm
摘要：
Task scheduling is an essential aspect of parallel process system. This NP-hard problem assumes fully connected homogeneous processors and ignores contention on the communication links. However, as arbitrary processor network (APN), communication contention has a strong influence on the execution time of a parallel application. This paper investigates the incorporation of contention awareness into task scheduling. The innovation is the idea of dynamically scheduling edges to links, for which we use the earliest finish communication time search algorithm based on shortest-path search method. The other novel idea proposed in this paper is scheduling priority based on recursive rank computation on heterogeneous arbitrary processor network. In the end, to reduce time complexity of algorithm, a parallel algorithm is proposed and speedup O(PPE) is achieved. The comparison study, based on both randomly generated graphs and the graphs of some real applications, shows that our scheduling algorithm significantly surpasses classic and static communication contention awareness algorithm, especially for high data transmission rate parallel application.
作者机构：
[Meng Zhang] Oriential Scientific and Technologic Institute Hunan Agriculture University;[Jiang-ping Yang] College of Science, China Agricultural University
摘要：
The Duffing equation with even-odd asymmetrical nonlinear-restoring force and one external forcing is investigated. The conditions of existence of primary resonance, second-order, third-order subharmonics, morder subharmonics and chaos are given by using the second-averaging method, the Melnikov method and bifurcation theory. Numerical simulations including bifurcation diagram, bifurcation surfaces and phase portraits show the consistence with the theoretical analysis. The numerical results also exhibit new dynamical behaviors including onset of chaos, chaos suddenly disappearing to periodic orbit, cascades of inverse period-doubling bifurcations, period-doubling bifurcation, symmetry period-doubling bifurcations of period-3 orbit, symmetrybreaking of periodic orbits, interleaving occurrence of chaotic behaviors and period-one orbit, a great abundance of periodic windows in transient chaotic regions with interior crises and boundary crisis and varied chaotic attractors. Our results show that many dynamical behaviors are strictly departure from the behaviors of the Duffing equation with odd-nonlinear restoring force.
期刊：
Journal of Materials Chemistry A,2015年3(16):8475-8482 ISSN：2050-7488
通讯作者：
Zhou, Shungui
作者机构：
[Tang, Jiahuan; Liu, Ting; Zhou, Shungui; Yuan, Yong; Fu, Peng] Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou, China;[Fu, Peng] School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China;[Liu, Ting] Orient Science and Technology College, Hunan Agricultural University, Changsha, China
关键词：
Periodic and subharmonic solutions;2 n th-order;n;Functional difference equations;Discrete variational theory;p -Laplacian;p
摘要：
By using the critical point theory, some new criteria are obtained for the existence and multiplicity of periodic and subharmonic solutions to a 2nth-order nonlinear difference equation containing both advance and retardation involving p-Laplacian. The proof is based on the Linking Theorem in combination with variational technique. Our results generalize and improve the results in the literature. (C) 2013 Royal Dutch Mathematical Society (KWG). Published by Elsevier B.V. All rights reserved.
作者机构：
[Tiejun Zhou; Min Long] College of Science, Hunan Agricultural University, Changsha, Hunan 410128, China;[Tiejun Zhou; Min Wang] College of Orient Science and Technology, Hunan Agricultural University, Changsha, Hunan 410128, China
摘要：
There is increasing evidence for considerable interlinking between the responses to heat stress (HS) and light signaling. In the present work, we provide molecular evidence that BBX18, a negative regulator in photomorphogenesis belonging to the B-box zinc finger protein family in Arabidopsis thaliana, is involved in the regulation of thermotolerance. Using quantitative RT-PCR, GUS staining and immunoblot analysis, our results indicate that the expression of BBX18 was induced by HS. BBX18-RNAi and 35S::BBX18 transgenic Arabidopsis plants were obtained for functional analysis of BBX18. Under-expression of BBX18 displayed increased both basal and acquired thermotolerance in the transgenic plants, while over-expression of BBX18 reduced tolerance to HS in transgenic lines. Moreover, when wild-type, BBX18-RNAi and 35S::BBX18 transgenic plants were treated with HS, HR-related digalactosyldiacylglycerol synthase 1 (DGD1) was down-regulated by BBX18 in both normal and heat shock conditions. Besides, the expression levels of Hsp70, Hsp101 and APX2 were increased in BBX18-RNAi transgenic plants, but lower in 35S::BBX18 transgenic plants. However, the expression of HsfA2 was lower in BBX18-RNAi transgenic plants and higher in the 35S::BBX18 after high-temperature treatment. These results suggesting that, by modulated expression of a set of HS-responsive genes, BBX18 weakened tolerance to HS in Arabidopsis. So our data indicate that BBX18 plays a negative role in thermotolerance.
作者机构：
[Li, Shun-Ji; Huang, Guo-Hua; Hu, Jue; Zhou, Gui-Wei; Zhu, Jie] Institute of Virology, Hunan Agricultural University, Changsha, Hunan, China;[Zhao, Yi-Pei; Wang, Xing] Department of Plant Protection, Oriental Science & Technology College of Hunan Agricultural University, Changsha, Hunan, China;[Zhou, Zhong-Shi] Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, Beijing, China
摘要：
Ascoviruses are double-stranded DNA viruses that are pathogenic to lepidopteran hosts, particularly noctuid larvae. Infection of a larva is characterized by retarded growth, reduced feeding and yellowish body color. In this paper, we reported the growth and development of three major agricultural noctuid insect pests, Helicoverpa armigera (Hubner), Spodoptera exigua (Hubner) and Spodoptera litura (Fabricius), infected with Heliothis virescens ascovirus 3h (HvAV-3h). Using 10-fold serial dilutions (0 to 7) of HvAV-3h-containing hemolymph to infect S. litura larvae, we found no significant difference in larval mortalities from 0 to 10(3)-fold dilutions; however, significant differences were observed at 10(4)-fold dilution and above. Using a 10-fold dilution of HvAV-3h-containing hemolymph to infect H. armigera, S. exigua and S. litura larvae, we found that the growth and development were significantly affected. All infected larvae could not pupate; the survival times of treated H. armigera, S. litura and S. exigua larvae were significantly longer than untreated control larvae. Body weight showed significant difference between treated and untreated control group from day 1 after inoculation in H. armigera and S. exigua, but day 2 in S. litura. Additionally, food intake also showed significant difference between treated and untreated control group from day 2 after inoculation in H. armigera and S. litura, but day 3 in S. exigua.
期刊：
Applied Mathematics and Computation,2014年236:613-620 ISSN：0096-3003
通讯作者：
Shi, H.(shp7971@163.com)
作者机构：
[Deng, Xiaoqing] School of Mathematics and Statistics, Hunan University of Commerce, Changsha 410205, China;[Zhang, Yuanbiao] Packaging Engineering Institute, Jinan University, Zhuhai 519070, China;[Shi, Haiping] Modern Business and Management Department, Guangdong Construction Vocational Technology Institute, Guangzhou 510450, China;[Liu, Xia] Oriental Science and Technology College, Hunan Agricultural University, Changsha 410128, China;[Liu, Xia] Science College, Hunan Agricultural University, Changsha 410128, China
通讯机构：
[Shi, Haiping] Guangdong Construct Vocat Technol Inst, Modern Business & Management Dept, Guangzhou 510450, Guangdong, Peoples R China.
关键词：
Periodic and subharmonic solutions;Fourth-order;Nonlinear difference equations;Discrete variational theory
期刊：
International journal of systematic and evolutionary microbiology,2014年64(Pt 11):3891-3896 ISSN：1466-5026
通讯作者：
Yang, Guiqin;Zhao, Yong
作者机构：
[Lu, Qin; Zhou, Shungui] Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, PR China;[Li, Jibing] College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, PR China Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, PR China;[Yang, Guiqin] Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, PR China ygqhappy@163.com yzhao@shou.edu.cn;[Zhao, Yong] College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, PR China ygqhappy@163.com yzhao@shou.edu.cn;[Liu, Ting] College of Orient Science and Technology, Hunan Agricultural University, Changsha 410128, PR China
摘要：
A Gram-reaction-variable, rod-shaped, motile, facultatively aerobic and endospore-forming bacterium, designated strain GSS02(T), was isolated from a forest soil. Strain GSS02(T) was capable of reducing humic substances and Fe(III) oxides. Strain GSS02(T) grew optimally at 35 degrees C, at pH 78 and in the presence of 1% NaCl. The predominant menaquinone was MK-7. The major cellular fatty acids were anteiso-C(15:0) and iso-C(16:0) and the polar lipid profile contained mainly phosphatidylethanolamine, diphosphatidylglycerol and phosphatidylglycerol, with moderate amounts of two unknown aminophospholipids and a minor amount of one unknown lipid. The DNA G+C content was 53.4 mol%. Comparative 16S rRNA gene sequence analysis showed that strain GSS02(T) was related most closely to Paenibacillus terrigena JCM 21741(T) (98.1% similarity). Mean DNA-DNA relatedness between strain GSS02(T) and P. terrigena JCM 21741(T) was 58.8 +/- 0.5%. The phylogenetic, chemotaxonomic and phenotypic results clearly demonstrated that strain GSS02(T) belongs to the genus Paenibacillus and represents a novel species, for which the name Paenibacillus guangzhouensis sp. nov. is proposed. The type strain is GSS02(T) ( =KCTC 33171(T) =CCTCC AB 2013236(T)).
作者机构：
[Zhou, Bin; Pang, Ran; Chen, Puyan; Cao, Ruibing; Lian, Xue; Huang, Li; He, Danni; Liu, Ke; Feng, Xiuli] Nanjing Agr Univ, Dept Vet Med Coll, Key Lab Anim Dis Diagnost & Immunol, Nanjing 210095, Jiangsu, Peoples R China.;[Chen, Puyan] Nanjing Agr Univ, Dept Vet Med Coll, Key Lab Anim Dis Diagnost & Immunol, YiFu 4037, Nanjing 210095, Jiangsu, Peoples R China.;[Miao, Denian] Shanghai Acad Agr Sci, Shanghai, Peoples R China.;[Luo, Chao] Hunan Agr Univ, Dept Orient Sci & Technol Coll, Changsha, Hunan, Peoples R China.;[Ma, Zhiyong] Chinese Acad Agr Sci, Shanghai Vet Res Inst, Shanghai 200241, Peoples R China.
通讯机构：
[Chen, Puyan] Nanjing Agr Univ, Dept Vet Med Coll, Key Lab Anim Dis Diagnost & Immunol, YiFu 4037, Nanjing 210095, Jiangsu, Peoples R China.
关键词：
Porcine reproductive and respiratory syndrome virus;Phage display;Antiviral peptide
摘要：
Porcine reproductive and respiratory syndrome is an important infectious disease of pigs and has a significant harmful effect on the livestock industry, especially in China. PRRSV ORF1b gene encodes primary proteins which play a vital role during PRRSV replication. In this paper, various 12-amino-acid peptides were displayed. These peptides could bind to the polymerase and helicase of PRRSV ORF1b protein, respectively, in which p9 exerted the highest antiviral activity with an IC50 of 56 mu M, and the minimum toxicity to cells. It was proved that p9 inhibited PRRSV replication in infected MARC-145 cells in a dose-dependent manner, and the amino acid sequence of HRILMRIR was important for antiviral activity of p9. Also, p9 could bind to the cell membrane and penetrated into cells. These result suggested that p9 might be a potential therapeutic drug for PRRSV infection. Crown Copyright (C) 2012 Published by Elsevier Inc. All rights reserved.
关键词：
Existence;Periodic solutions;Nonlinear;Difference equations;Discrete variational theory
摘要：
By making use of the critical point theory, the existence of periodic solutions for a class of nonlinear difference equations is obtained. The proof is based on the saddle point theorem in combination with variational technique. The problem is to solve the existence of periodic solutions of a class of nonlinear difference equations. Results obtained complement the existing one.
关键词：
Homoclinic orbits;Nonlinear difference equations;Jacobi operators;Advance and retardation;Discrete variational theory
摘要：
By using the critical point theory, the existence of a nontrivial homoclinic orbit which decays exponentially at infinity for difference equations containing both advance and retardation is obtained. The proof is based on the Mountain Pass Lemma in combination with periodic approximations. Our results obtained successfully extend and complement the results in the literature. (C) 2014 Royal Dutch Mathematical Society (KWG). Published by Elsevier B.V. All rights reserved.
关键词：
Ecosystem monitoring - Experimental models - Heavy metal pollution - Metal pollution - Physiological mechanisms - Physiological trait - Spiders - Toxicological effects
摘要：
Heavy metals can accumulate in the bodies of spiders and affect their physiological and ecological traits and/or show toxicological effects. Spiders are thus considered to be potential bioindicators of heavy metal pollution for ecosystem monitoring, due to their superior resistance to and regulation of heavy metals. The metal loads in spider bodies show considerable variation within and among species, metal types, geochemical sites, exposure pathways, spider physiological traits, and other factors. Moreover, the mechanism of physiological regulation and tolerance in spiders to different kinds of heavy metals also varies significantly; it has been shown that those two differences are synergistic effects. Since the ecotoxicology and differences in physiological mechanisms remain unclear, questions and recommendations for possible further research are suggested.
作者机构：
[Zhao, Fan] Orient Science and Technology College, Hunan Agricultural University, Changsha 410128, China and Science College, Hunan Agricultural University, Changsha 410128, China;[Tang, Jianfeng] Science College, Hunan Agricultural University, Changsha 410128, China;[He, Feng] College of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan 411201, China
摘要：
We investigate the influence of cosmological constant Λ on gravitational lensing. By the method of an elliptic integral, we give out the solution to the null geodesic equation in the Reissner–Nordstrom–de Sitter spacetime. The deflection angle of light is obtained by studying the intrinsic geometry of the spatial equatorial plane in the Reissner–Nordstrom–de Sitter spacetime. By applying the expansion of elliptic integrals, we find the deflection angle in the weak field limit and in the strong field limit, respectively. We find the angular position and magnification of images and discuss its behavior under changed Λ. At last, we give out the higher-order term in the strong field limit.
摘要：
The mir-155 family is not only involved in a diversity of cancers, but also as a regulator of the immune system. However, the evolutionary history of this family is still unclear. The present study indicates that mir-155 evolved independently with lineage-specific gain of miRNAs. In addition, arm switching has occurred in the mir-155 family, and alternative splicing could produce two different lengths of ancestral sequences, implying the alternative splicing can also drive evolution for intragenic miRNAs. Here we screened validated target genes and immunity- related proteins, followed by analyzation of the mir-155 family function by high-throughput methods like the gene ontology (GO) and Kyoto Eneyclopedin of Genes and Genemes (KEGG) pathway enrichment analysis. The high-throughput analysis showed that the CCND1 and EGFR genes were outstanding in being significantly enriched, and the target genes cebpb and VCAM1 and the protein SMAD2 were also vital in mir-155-related immune reponse activities. Therefore, we conclude that the mir-155 family is highly conserved in evolution, and CCND1 and EGFR genes might be potential targets of mir-155 with regard to progress of cancers, while the cebpb and VCAM1 genes and the protein SMAD2 might be key factors in the mir-155 regulated immune activities.
摘要：
In this paper, the buckling behaviors of axially functionally graded and non-uniform Timoshenko beams were investigated. Based on the auxiliary function and power series, the coupled governing equations were converted into a system of linear algebraic equations. With various end conditions, the characteristic polynomial equations in the buckling loads were obtained for axially inhomogeneous beams. The lower and higher-order eigenvalues were calculated simultaneously from the multi-roots due to the fact that the derived characteristic equation was a polynomial one. The computed results were in good agreement with those analytical and numerical ones in literature.
期刊：
Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A. Matemáticas,2016年110(1):65-78 ISSN：1578-7303
通讯作者：
Shi, HP
作者机构：
[Zhang, Yuanbiao] Jinan Univ, Packaging Engn Inst, Zhuhai 519070, Peoples R China.;[Shi, Haiping] Guangdong Construct Vocat Technol Inst, Modern Business & Management Dept, Guangzhou 510440, Guangdong, Peoples R China.;[Liu, Xia] Hunan Agr Univ, Oriental Sci & Technol Coll, Changsha 410128, Hunan, Peoples R China.;[Liu, Xia] Hunan Gricultural Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Shi, Haiping] Guangdong Construct Vocat Technol Inst, Modern Business & Management Dept, Guangzhou 510440, Guangdong, Peoples R China.
关键词：
Homoclinic orbits;Second order;p-Laplacian difference equations;Discrete variational methods;Advance and retardation
摘要：
Using the critical point theory, we obtain the existence of a nontrivial homoclinic orbit for second order \(p\)-Laplacian difference equations containing both advance and retardation. The proof is based on the Mountain Pass Lemma in combination with periodic approximations. One of our results generalizes and improves the results in the literature.
作者机构：
[Zhang, Yuanbiao] Jinan Univ, Packaging Engn Inst, Zhuhai 519070, Peoples R China.;[Shi, Haiping] Guangdong Construct Vocat Technol Inst, Modern Business & Management Dept, Guangzhou 510450, Guangdong, Peoples R China.;[Liu, Xia] Hunan Agr Univ, Oriental Sci & Technol Coll, Changsha 410128, Hunan, Peoples R China.;[Liu, Xia] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Shi, Haiping] Guangdong Construct Vocat Technol Inst, Modern Business & Management Dept, Guangzhou 510450, Guangdong, Peoples R China.
关键词：
Nonexistence and existence;Dirichlet boundary value problem;2nth-order;Mountain Pass Lemma;Discrete variational theory
摘要：
This paper is concerned with a 2nth-order nonlinear difference equation. By making use of the critical point method, we establish various sets of sufficient conditions for the nonexistence and existence of solutions for Dirichlet boundary value problem and give some new results. The existing results are generalized and significantly complemented.
摘要：
We investigate the influence of a cosmological constant Lambda on gravitational lensing effects. By the method of an elliptic integral, we give the solution to the null geodesic equation in Schwarzschild-de Sitter spacetime. The deflection angle of light is obtained by studying the intrinsic geometry of the spatial equatorial plane in Schwarzschild-de Sitter spacetime. By applying the expansion of elliptic integrals, we find the deflection angle in the weak field limit and in the strong field limit, respectively. We verify that the deflection angle, angular position, and magnification of images are all monotonically decreasing functions of Lambda.
