gao xiaopeng - Academia.edu (original) (raw)

Papers by gao xiaopeng

Frontiers of Earth Science in China, 2007

Three Late Triassic plate sutures, namely, the Longmu Co-Shuanghu suture, Kunlun-Qinling suture a... more Three Late Triassic plate sutures, namely, the Longmu Co-Shuanghu suture, Kunlun-Qinling suture and Xijinwulan-Jinshajiang suture, have been recognized on the Qinghai-Tibet plateau. Data show that the last two sutures have no essential elements of the northern boundary of Gondwana. This paper briefly introduces the facts of the existence of the paleo-Tethys Ocean in the Longmu Co-Shuanghu suture, i.e., the ages and natures of Early Paleozoic ophiolites, Permian ophiolites, Devonian-Permian radiolarian cherts, accretionary relics of different natures, two types of tectonic mélange zones and ophiolites. The starting time of paleo-Tethys Ocean in Qiangtang may be traced back to the Early Paleozoic and the records about the oceanic basin evolution lasted from the Late Devonian to Late Triassic. It is thought that the Longmu Co-Shuanghu suture was the site for the extinction of the paleo-Tethys Ocean on Qinghai-Tibet plateau and an important window for the reconstruction and inversion of the early-stage formation and evolution of the Qinghai-Tibet plateau, as well as the northern boundary of Gondwana wich the geoscience community has paid attention to in the past few decades.

Molecular Physics, 2012

The N–H ··· π H-bond interactions of clusters and liquid formed by pyrrole molecules were investi... more The N–H ··· π H-bond interactions of clusters and liquid formed by pyrrole molecules were investigated by Quantum Mechanics (QM) and classical Molecular Dynamics (MD), respectively. Based on the optimized geometry at the B97-D/aug-cc-pVTZ level of theory including dispersion correction, the nature and the origin of N–H ··· π H-bond interactions were unveiled by atoms in molecules (AIM), natural bond orbital (NBO), and energy decomposition analysis (EDA). Among them, the AIM analysis gives evidence to the presence of N–H ··· π H-bond interactions, the NBO examination reveals that π → σ* donor-acceptor orbital interaction is of great importance. EDA study indicates that N–H ··· π interactions are governed by the electrostatic and dispersion term. Meanwhile, MD simulation with OPLS-AA (optimized potentials for liquid simulations all-atom) was applied to study the pure liquid pyrrole at different temperature. The results confirm the existence of the N–H ··· π H-bond in the pure liquid pyrrole, and further characterized the structures of this H-bond which is somewhat different to the clusters.

International Journal of Systematic and Evolutionary Microbiology, 2010

Haloplanus vescus sp. nov., an extremely halophilic archaeon from a marine solar saltern, and eme... more Haloplanus vescus sp. nov., an extremely halophilic archaeon from a marine solar saltern, and emended description of the genus Haloplanus An extremely halophilic archaeon, strain RO5-8 T , was isolated from a disused marine solar saltern in China. The cells were pleomorphic and flat. In static liquid medium, cells floated to the surface. Strain RO5-8 T stained Gram-negative and colonies were pink-pigmented. It was able to grow at 30-50 6C (optimum 40 6C), at 2.6-4.3 M NaCl (optimum 3.1 M NaCl), at 0.03-0.5 M MgCl 2 (optimum 0.03 M MgCl 2 ) and at pH 5.5-7.5 (optimum pH 6.0-6.5). Cells lysed in distilled water and the minimal NaCl concentration to prevent cell lysis was 12 % (w/v). The major polar lipids of strain RO5-8 T were phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester, phosphatidylglycerol sulfate and one major glycolipid chromatographically identical to the sulfated mannosyl glucosyl diether S-DGD-1. On the basis of 16S rRNA gene sequence analysis, strain RO5-8 T was closely related to three strains of Haloplanus natans with similarities of 97.3-97.6 %. The DNA G+C content of strain RO5-8 T was 62.1 mol%. The DNA-DNA hybridization value between strain RO5-8 T and Haloplanus natans JCM 14081 T was 51.6 %. It was concluded that strain RO5-8 T represents a novel species of the genus Haloplanus, for which the name Haloplanus vescus sp. nov. is proposed. The type strain is RO5-8 T (5CGMCC 1.8712 T 5JCM 16055 T ).

International Journal of Systematic and Evolutionary Microbiology, 2010

Haladaptatus litoreus sp. nov., an extremely halophilic archaeon from a marine solar saltern, and... more Haladaptatus litoreus sp. nov., an extremely halophilic archaeon from a marine solar saltern, and emended description of the genus Haladaptatus Two extremely halophilic archaea, strains RO1-28 T and RO1-22, were isolated from a marine solar saltern in Jiangsu, China. Both strains required at least 0.05 M Mg 2+ and 1.7 M NaCl for growth. They were able to grow over a pH range of 6.0-8.5 and a temperature range of 25-55 6C, with optimal pH of 7.0 and optimal temperature of 37-40 6C. Based on 16S rRNA gene sequence analysis, strains RO1-28 T and RO1-22 were closely related to Haladaptatus paucihalophilus, the single species of the genus Haladaptatus, with similarities of 94.0-95.2 %. The major polar lipids of the two strains were phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester, phosphatidylglycerol sulfate and three glycolipids chromatographically identical to the glycolipids of Haladaptatus paucihalophilus JCM 13897 T . Both strains RO1-28 T and RO1-22 had a DNA G+C content of 54.0 mol% (HPLC). The DNA-DNA hybridization value between the two strains was more than 70 % (92 %) and both strains showed low levels of DNA-DNA relatedness (32 % and 33 %) with Haladaptatus paucihalophilus JCM 13897 T . It was concluded that strains RO1-28 T and RO1-22 represent a novel species of the genus Haladaptatus, for which the name Haladaptatus litoreus sp. nov. is proposed. The type strain is RO1-28 T (5CGMCC 1.7737 T 5JCM 15771 T ).

ABSTRACT In this paper, a mode-dependent intra frame interpolation method is proposed for H.264/A... more ABSTRACT In this paper, a mode-dependent intra frame interpolation method is proposed for H.264/AVC compressed video. The intra prediction mode information is taken into account in the interpolation filter design. For each intra prediction mode, an optimal Wiener filter is trained based on the representative video sequences. Therefore the trained filter is adaptive to the intra prediction mode. Furthermore, the quantization parameter is also explored as context information for filter selection. Extensive experiments demonstrate that the proposed method achieves better performance than the traditional methods such as Bicubic, Bilinear, LAZA and NEDI, while keeping low computational complexity.

International Journal of Systematic and Evolutionary Microbiology, 2009

Halogeometricum rufum sp. nov., a halophilic archaeon from a marine solar saltern, and emended de... more Halogeometricum rufum sp. nov., a halophilic archaeon from a marine solar saltern, and emended description of the genus Halogeometricum Two halophilic archaea, strains RO1-4 T and RO1-64, were isolated from a marine solar saltern in Jiangsu, China. Cells of the two strains were pleomorphic, motile, and stained Gram-negative. Colonies were red-pigmented. Strains RO1-4 T and RO1-64 were able to grow at 25-55 6C (optimum 40-42 6C), at 2.1-5.1 M NaCl (optimum 3.9 M NaCl), at 0.05-0.7 M MgCl 2 (optimum 0.3 M MgCl 2 ) and at pH 6.0-8.5 (optimum pH 7.0). Cells lyse in distilled water and the minimal NaCl concentration to prevent cell lysis is 12 % (w/v). On the basis of 16S rRNA gene sequence analysis, strains RO1-4 T and RO1-64 were closely related to Halogeometricum borinquense PR3 T (98.0 and 98.2 % similarity, respectively) and Halosarcina pallida BZ256 T (97.8 and 97.9 %). The major polar lipids of the two strains were phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester and two glycolipids (S-DGD-1 and DGD-1). The DNA G+C contents of strains RO1-4 T and RO1-64 are 64.9 and 62.4 mol%, respectively. The DNA-DNA hybridization value between strains RO1-4 T and RO1-64 was 83.0 % and both strains showed low DNA-DNA relatedness with Halogeometricum borinquense PR3 T (42.5 and 50.1 % relatedness, respectively) and Halosarcina pallida BZ256 T (37.6 and 42.1 % relatedness). It was concluded that strains RO1-4 T and RO1-64 represent a novel species of the genus Halogeometricum, for which the name Halogeometricum rufum sp. nov. is proposed. The type strain is RO1-4 T (5CGMCC 1.7736 T 5JCM 15770 T ).

International Journal of Systematic and Evolutionary Microbiology, 2009

A halophilic archaeon, strain RO1-6(T), was isolated from a marine solar saltern in eastern China... more A halophilic archaeon, strain RO1-6(T), was isolated from a marine solar saltern in eastern China. Cells of strain RO1-6(T) were pleomorphic and motile and stained Gram-negative. Strain RO1-6(T) grew well on complex medium and colonies were red-pigmented. It was able to grow at 20-50°C (optimum 37°C), in 2.1-5.1M NaCl (optimum 3.9 M NaCl), in 0.05-0.70 M MgCl₂ (optimum 0.30 M MgCl₂) and at pH 6.5-8.0 (optimum pH 7.0). Cells lysed in distilled water and the minimal NaCl concentration to prevent cell lysis was 12 % (w/v). The major polar lipids of strain RO1-6(T) were phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester and two glycolipids that were chromatographically identical to S-DGD-1 and S₂-DGD. The 16S rRNA gene sequence of strain RO1-6(T) showed similarities of 96.9 and 96.4 % to those of the type strains of Halosarcina pallida and Halogeometricum borinquense, respectively, members of the most closely related recognized genera within the family Halobacteriaceae. The DNA G+C content of strain RO1-6(T) was 61.2 mol%. Phenotypic characterization and phylogenetic analysis revealed that strain RO1-6(T) is related to Halosarcina pallida and represents a novel species of the genus Halosarcina, for which the name Halosarcina limi sp. nov. is proposed; the type strain is RO1-6(T) (=CGMCC 1.8711(T) =JCM 16054(T)).

To explore the relation between heparanase (HPA) and nm23-H1 in hepatocellular carcinoma (HCC), a... more To explore the relation between heparanase (HPA) and nm23-H1 in hepatocellular carcinoma (HCC), and whether they could be used as valuable markers in predicting post-operative metastasis and recurrence of HCC.

1. The current plan of "limiting purchase" (&am... more 1. The current plan of "limiting purchase" (>i>xian gou>/i>) contains insuperable defects. It is difficult to implement because of the many problems involved, and its stated goals will be hard to accomplish. First of all, it will drastically slow down the rate of increase in peasants' incomes. In some areas, absolute incomes will drop (grain and cotton alone will reduce

Transactions of Nonferrous Metals Society of China, 2010

The general behavior of micron-particles in the inner domain of porous ceramic vessel was simulat... more The general behavior of micron-particles in the inner domain of porous ceramic vessel was simulated by computational fluid dynamics software in terms of sampling experimental data. The results show that there is an optimum porosity of 0.32 to get a higher efficiency and lower pressure drop during filtration. According to the results of simulation and experiment, it is evident that lower inlet velocity can maintain lower pressure drop and obtain higher collection efficiency and inlet concentration also has a crucial influence on the collection efficiency. The collection efficiency of equipment increases significantly with the increase of inlet concentration when the inlet concentration is less than 6.3 g/m 3 , but it gradually tends to be stable in the range of 97.3% 99.7% when the inlet concentration is over this concentration.

... PM Zamith, Esteban WG Clua, Aura Conci, Anselmo Montenegro, Regina CP Leal-Toledo, Paulo A. P... more ... PM Zamith, Esteban WG Clua, Aura Conci, Anselmo Montenegro, Regina CP Leal-Toledo, Paulo A. Pagliosa, Luis Valente, Bruno Feijo. ... ACM SIGGRAPH Asia 2008 papers, 1-8. [12] Yuri Dotsenko, Naga K. Govindaraju, Peter-Pike Sloan, Charles Boyd, John Manferdelli. ...

Dual systems consisting of two shear-flexural structures are often used in high-rise buildings. T... more Dual systems consisting of two shear-flexural structures are often used in high-rise buildings. This paper presents a secondorder analysis of such dual systems, in which closed-form solutions are derived for the lateral flexural and shear displacements, as well as for the bending moments and shear forces in the two structures. The buckling of the dual system is also investigated. It is found that the total buckling load is a simple summation of the buckling loads of the two component structures when they act independently, and that it is independent of the distribution of the vertical loads amongst the two structures. A simple formula for the amplification factors is proposed for use in routine design. The second-order theory developed in this paper is used to investigate the amplification factors for the lateral displacements and bending moments in a typical shear-flexural structure. It is shown that the amplification factors determined from the proposed formula are in good agreement with those obtained by the more rigorous second-order analysis in most cases. It is also found that the various amplification factors are independent of the distribution of the vertical loads among the two structures.

Frontiers of Earth Science in China, 2007

Three Late Triassic plate sutures, namely, the Longmu Co-Shuanghu suture, Kunlun-Qinling suture a... more Three Late Triassic plate sutures, namely, the Longmu Co-Shuanghu suture, Kunlun-Qinling suture and Xijinwulan-Jinshajiang suture, have been recognized on the Qinghai-Tibet plateau. Data show that the last two sutures have no essential elements of the northern boundary of Gondwana. This paper briefly introduces the facts of the existence of the paleo-Tethys Ocean in the Longmu Co-Shuanghu suture, i.e., the ages and natures of Early Paleozoic ophiolites, Permian ophiolites, Devonian-Permian radiolarian cherts, accretionary relics of different natures, two types of tectonic mélange zones and ophiolites. The starting time of paleo-Tethys Ocean in Qiangtang may be traced back to the Early Paleozoic and the records about the oceanic basin evolution lasted from the Late Devonian to Late Triassic. It is thought that the Longmu Co-Shuanghu suture was the site for the extinction of the paleo-Tethys Ocean on Qinghai-Tibet plateau and an important window for the reconstruction and inversion of the early-stage formation and evolution of the Qinghai-Tibet plateau, as well as the northern boundary of Gondwana wich the geoscience community has paid attention to in the past few decades.

Molecular Physics, 2012

The N–H ··· π H-bond interactions of clusters and liquid formed by pyrrole molecules were investi... more The N–H ··· π H-bond interactions of clusters and liquid formed by pyrrole molecules were investigated by Quantum Mechanics (QM) and classical Molecular Dynamics (MD), respectively. Based on the optimized geometry at the B97-D/aug-cc-pVTZ level of theory including dispersion correction, the nature and the origin of N–H ··· π H-bond interactions were unveiled by atoms in molecules (AIM), natural bond orbital (NBO), and energy decomposition analysis (EDA). Among them, the AIM analysis gives evidence to the presence of N–H ··· π H-bond interactions, the NBO examination reveals that π → σ* donor-acceptor orbital interaction is of great importance. EDA study indicates that N–H ··· π interactions are governed by the electrostatic and dispersion term. Meanwhile, MD simulation with OPLS-AA (optimized potentials for liquid simulations all-atom) was applied to study the pure liquid pyrrole at different temperature. The results confirm the existence of the N–H ··· π H-bond in the pure liquid pyrrole, and further characterized the structures of this H-bond which is somewhat different to the clusters.

International Journal of Systematic and Evolutionary Microbiology, 2010

Haloplanus vescus sp. nov., an extremely halophilic archaeon from a marine solar saltern, and eme... more Haloplanus vescus sp. nov., an extremely halophilic archaeon from a marine solar saltern, and emended description of the genus Haloplanus An extremely halophilic archaeon, strain RO5-8 T , was isolated from a disused marine solar saltern in China. The cells were pleomorphic and flat. In static liquid medium, cells floated to the surface. Strain RO5-8 T stained Gram-negative and colonies were pink-pigmented. It was able to grow at 30-50 6C (optimum 40 6C), at 2.6-4.3 M NaCl (optimum 3.1 M NaCl), at 0.03-0.5 M MgCl 2 (optimum 0.03 M MgCl 2 ) and at pH 5.5-7.5 (optimum pH 6.0-6.5). Cells lysed in distilled water and the minimal NaCl concentration to prevent cell lysis was 12 % (w/v). The major polar lipids of strain RO5-8 T were phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester, phosphatidylglycerol sulfate and one major glycolipid chromatographically identical to the sulfated mannosyl glucosyl diether S-DGD-1. On the basis of 16S rRNA gene sequence analysis, strain RO5-8 T was closely related to three strains of Haloplanus natans with similarities of 97.3-97.6 %. The DNA G+C content of strain RO5-8 T was 62.1 mol%. The DNA-DNA hybridization value between strain RO5-8 T and Haloplanus natans JCM 14081 T was 51.6 %. It was concluded that strain RO5-8 T represents a novel species of the genus Haloplanus, for which the name Haloplanus vescus sp. nov. is proposed. The type strain is RO5-8 T (5CGMCC 1.8712 T 5JCM 16055 T ).

International Journal of Systematic and Evolutionary Microbiology, 2010

Haladaptatus litoreus sp. nov., an extremely halophilic archaeon from a marine solar saltern, and... more Haladaptatus litoreus sp. nov., an extremely halophilic archaeon from a marine solar saltern, and emended description of the genus Haladaptatus Two extremely halophilic archaea, strains RO1-28 T and RO1-22, were isolated from a marine solar saltern in Jiangsu, China. Both strains required at least 0.05 M Mg 2+ and 1.7 M NaCl for growth. They were able to grow over a pH range of 6.0-8.5 and a temperature range of 25-55 6C, with optimal pH of 7.0 and optimal temperature of 37-40 6C. Based on 16S rRNA gene sequence analysis, strains RO1-28 T and RO1-22 were closely related to Haladaptatus paucihalophilus, the single species of the genus Haladaptatus, with similarities of 94.0-95.2 %. The major polar lipids of the two strains were phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester, phosphatidylglycerol sulfate and three glycolipids chromatographically identical to the glycolipids of Haladaptatus paucihalophilus JCM 13897 T . Both strains RO1-28 T and RO1-22 had a DNA G+C content of 54.0 mol% (HPLC). The DNA-DNA hybridization value between the two strains was more than 70 % (92 %) and both strains showed low levels of DNA-DNA relatedness (32 % and 33 %) with Haladaptatus paucihalophilus JCM 13897 T . It was concluded that strains RO1-28 T and RO1-22 represent a novel species of the genus Haladaptatus, for which the name Haladaptatus litoreus sp. nov. is proposed. The type strain is RO1-28 T (5CGMCC 1.7737 T 5JCM 15771 T ).

ABSTRACT In this paper, a mode-dependent intra frame interpolation method is proposed for H.264/A... more ABSTRACT In this paper, a mode-dependent intra frame interpolation method is proposed for H.264/AVC compressed video. The intra prediction mode information is taken into account in the interpolation filter design. For each intra prediction mode, an optimal Wiener filter is trained based on the representative video sequences. Therefore the trained filter is adaptive to the intra prediction mode. Furthermore, the quantization parameter is also explored as context information for filter selection. Extensive experiments demonstrate that the proposed method achieves better performance than the traditional methods such as Bicubic, Bilinear, LAZA and NEDI, while keeping low computational complexity.

International Journal of Systematic and Evolutionary Microbiology, 2009

Halogeometricum rufum sp. nov., a halophilic archaeon from a marine solar saltern, and emended de... more Halogeometricum rufum sp. nov., a halophilic archaeon from a marine solar saltern, and emended description of the genus Halogeometricum Two halophilic archaea, strains RO1-4 T and RO1-64, were isolated from a marine solar saltern in Jiangsu, China. Cells of the two strains were pleomorphic, motile, and stained Gram-negative. Colonies were red-pigmented. Strains RO1-4 T and RO1-64 were able to grow at 25-55 6C (optimum 40-42 6C), at 2.1-5.1 M NaCl (optimum 3.9 M NaCl), at 0.05-0.7 M MgCl 2 (optimum 0.3 M MgCl 2 ) and at pH 6.0-8.5 (optimum pH 7.0). Cells lyse in distilled water and the minimal NaCl concentration to prevent cell lysis is 12 % (w/v). On the basis of 16S rRNA gene sequence analysis, strains RO1-4 T and RO1-64 were closely related to Halogeometricum borinquense PR3 T (98.0 and 98.2 % similarity, respectively) and Halosarcina pallida BZ256 T (97.8 and 97.9 %). The major polar lipids of the two strains were phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester and two glycolipids (S-DGD-1 and DGD-1). The DNA G+C contents of strains RO1-4 T and RO1-64 are 64.9 and 62.4 mol%, respectively. The DNA-DNA hybridization value between strains RO1-4 T and RO1-64 was 83.0 % and both strains showed low DNA-DNA relatedness with Halogeometricum borinquense PR3 T (42.5 and 50.1 % relatedness, respectively) and Halosarcina pallida BZ256 T (37.6 and 42.1 % relatedness). It was concluded that strains RO1-4 T and RO1-64 represent a novel species of the genus Halogeometricum, for which the name Halogeometricum rufum sp. nov. is proposed. The type strain is RO1-4 T (5CGMCC 1.7736 T 5JCM 15770 T ).

International Journal of Systematic and Evolutionary Microbiology, 2009

A halophilic archaeon, strain RO1-6(T), was isolated from a marine solar saltern in eastern China... more A halophilic archaeon, strain RO1-6(T), was isolated from a marine solar saltern in eastern China. Cells of strain RO1-6(T) were pleomorphic and motile and stained Gram-negative. Strain RO1-6(T) grew well on complex medium and colonies were red-pigmented. It was able to grow at 20-50°C (optimum 37°C), in 2.1-5.1M NaCl (optimum 3.9 M NaCl), in 0.05-0.70 M MgCl₂ (optimum 0.30 M MgCl₂) and at pH 6.5-8.0 (optimum pH 7.0). Cells lysed in distilled water and the minimal NaCl concentration to prevent cell lysis was 12 % (w/v). The major polar lipids of strain RO1-6(T) were phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester and two glycolipids that were chromatographically identical to S-DGD-1 and S₂-DGD. The 16S rRNA gene sequence of strain RO1-6(T) showed similarities of 96.9 and 96.4 % to those of the type strains of Halosarcina pallida and Halogeometricum borinquense, respectively, members of the most closely related recognized genera within the family Halobacteriaceae. The DNA G+C content of strain RO1-6(T) was 61.2 mol%. Phenotypic characterization and phylogenetic analysis revealed that strain RO1-6(T) is related to Halosarcina pallida and represents a novel species of the genus Halosarcina, for which the name Halosarcina limi sp. nov. is proposed; the type strain is RO1-6(T) (=CGMCC 1.8711(T) =JCM 16054(T)).

To explore the relation between heparanase (HPA) and nm23-H1 in hepatocellular carcinoma (HCC), a... more To explore the relation between heparanase (HPA) and nm23-H1 in hepatocellular carcinoma (HCC), and whether they could be used as valuable markers in predicting post-operative metastasis and recurrence of HCC.

1. The current plan of "limiting purchase" (&am... more 1. The current plan of "limiting purchase" (>i>xian gou>/i>) contains insuperable defects. It is difficult to implement because of the many problems involved, and its stated goals will be hard to accomplish. First of all, it will drastically slow down the rate of increase in peasants' incomes. In some areas, absolute incomes will drop (grain and cotton alone will reduce

Transactions of Nonferrous Metals Society of China, 2010

The general behavior of micron-particles in the inner domain of porous ceramic vessel was simulat... more The general behavior of micron-particles in the inner domain of porous ceramic vessel was simulated by computational fluid dynamics software in terms of sampling experimental data. The results show that there is an optimum porosity of 0.32 to get a higher efficiency and lower pressure drop during filtration. According to the results of simulation and experiment, it is evident that lower inlet velocity can maintain lower pressure drop and obtain higher collection efficiency and inlet concentration also has a crucial influence on the collection efficiency. The collection efficiency of equipment increases significantly with the increase of inlet concentration when the inlet concentration is less than 6.3 g/m 3 , but it gradually tends to be stable in the range of 97.3% 99.7% when the inlet concentration is over this concentration.

... PM Zamith, Esteban WG Clua, Aura Conci, Anselmo Montenegro, Regina CP Leal-Toledo, Paulo A. P... more ... PM Zamith, Esteban WG Clua, Aura Conci, Anselmo Montenegro, Regina CP Leal-Toledo, Paulo A. Pagliosa, Luis Valente, Bruno Feijo. ... ACM SIGGRAPH Asia 2008 papers, 1-8. [12] Yuri Dotsenko, Naga K. Govindaraju, Peter-Pike Sloan, Charles Boyd, John Manferdelli. ...

Dual systems consisting of two shear-flexural structures are often used in high-rise buildings. T... more Dual systems consisting of two shear-flexural structures are often used in high-rise buildings. This paper presents a secondorder analysis of such dual systems, in which closed-form solutions are derived for the lateral flexural and shear displacements, as well as for the bending moments and shear forces in the two structures. The buckling of the dual system is also investigated. It is found that the total buckling load is a simple summation of the buckling loads of the two component structures when they act independently, and that it is independent of the distribution of the vertical loads amongst the two structures. A simple formula for the amplification factors is proposed for use in routine design. The second-order theory developed in this paper is used to investigate the amplification factors for the lateral displacements and bending moments in a typical shear-flexural structure. It is shown that the amplification factors determined from the proposed formula are in good agreement with those obtained by the more rigorous second-order analysis in most cases. It is also found that the various amplification factors are independent of the distribution of the vertical loads among the two structures.