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Zhang, Xiaomeng,Zhang, Xueyong,Liu, Wenting,Li, Zheng,Zhang, Xiaowei,Zhou, Yilun Techno-Press 2021 Advances in concrete construction Vol.11 No.1
A new type of composite insulated concrete sandwich wall (ICS-wall), which is composed of a triangle truss steel wire network, an insulating layer, and internal and external concrete layers, is proposed. To study the mechanical properties of this new ICS-wall, tensile, compression, and shearing tests were performed on 22 specimens and tensile strength and corrosion resistance tests on 6 triangle truss joints. The variables in these tests mainly include the insulating plate material, the thickness of the insulating plate, the vertical distance of the triangle truss framework, the triangle truss layout, and the connecting mode between the triangle truss and wall and the material of the triangle truss. Moreover, the failure mode, mechanical properties, and bearing capacity of the wall under tensile, shearing, and compression conditions were analyzed. Research results demonstrate that the concrete and insulating layer of the ICS-wall are pulling out, which is the main failure mode under tensile conditions. The ICS-wall, which uses a graphite polystyrene plate as the insulating layer, shows better tensile properties than the wall with an ordinary polystyrene plate. The tensile strength and bearing capacity of the wall can be improved effectively by strengthening the triangle truss connection and shortening the vertical distances of the triangle truss. The compression capacity of the wall is mainly determined by the compression capacity of concrete, and the bonding strength between the wall and the insulating plate is the main influencing factor of the shearing capacity of the wall. According to the tensile strength and corrosion resistance tests of Austenitic stainless steel, the bearing capacity of the triangle truss does not decrease after corrosion, indicating good corrosion resistance.
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Yingxin Huang,Xueyong Zhao,Hongxuan Zhang,Wisdom Japhet,Xiaoan Zuo,Yayong Luo,Gang Huang 한국식물학회 2009 Journal of Plant Biology Vol.52 No.3
We monitored the allometric effects for greenhouse- grown Agriophyllum squarrosum plants in response to variations in population density and the availability of soil nutrients and water. Biomass allocations were sizedependent. The plasticity of roots, stems, leaves, and reproductive effort was “true” in response to changes in nutrient content. At a low level of soil minerals, plants allocated more resources to the development of roots and reproductive organs than to leaves, but data for stem allocations were consistent for tradeoffs between the effects of nutrients and plant size. The plasticities of leaf allocation and reproductive effort were “true” whereas those of root and stem allocations were “apparent” in response to fluctuations in soil water, being a function of plant size. Decreasing soil water content was associated with higher leaf allocation and lower reproductive effort. Except for this “apparent” plasticity of leaf allocation, none was detected with population density on biomass allocation. Architectural traits were determinants of the latter. For roots, the determining trait was the ratio of plant height to total biomass; for stems and reproduction, plant height; and for leaves, the ratio of branch numbers to plant height.
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Chinese Stock Market Return Predictability: Adaptive Complete Subset Regressions
Keqi Chen,Rui Chen,Xueyong Zhang,Min Zhu 한국증권학회 2016 Asia-Pacific Journal of Financial Studies Vol.45 No.5
This paper proposes a new combination framework to explore the Chinese stock market return predictability. While most well-known predictor variables and simple combinations fail to beat the historical average benchmark, our adaptive complete subset regressions deliver statistically and economically significant out-of-sample performance. The subset, in which each regression includes five predictors, produces a significant R2 OS statistic of 8.00% for January 2006 to September 2014. A mean-variance investor who uses the adaptive subset regressions forecasts, instead of the historical average forecasts, can obtain sizable utility gains of 7.60% per annum. The results of our paper suggest that there is significant predictability in the Chinese aggregate stock market portfolio.
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BiFeO3 Thickness Dependence of the Exchange Bias in Polycrystalline BiFeO3/NiFe Bilayers
Xiaobo Xue,Biao You,Wenbing Rui,Wei Zhang,Jun Du,Xueyong Yuan,Qingyu Xu 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
A clear exchange bias has been observed at room temperature in a series of BiFeO3(t)/NiFe(3.6nm) bilayers, in which the BiFeO3 layers are single-phase polycrystalline with t varied from 8 nmto 240 nm. With increasing t, both the exchange bias field (HE) and the coercivity (HC) increasesharply and approach maxima when t is about 40 nm, which is close to one half the spin cycloidalmodulation period (64 nm) of the bulk BiFeO3 material. The oscillatory variations of HE and HCwith the BiFeO3 layer thickness suggest that the cycloidal spin structure may exist in polycrystallineBiFeO3 thin films. The angular dependence of the exchange bias exhibits collinear unidirectionaland uniaxial anisotropies in the present BiFeO3/NiFe bilayers.
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Characterization of Squamosa Promoter Binding Protein-LIKE genes in wheat
Bingnan Wang,Shuaifeng Geng,Di Wang,Nan Feng,Dongdong Zhang,Liang Wu,Chenyang Hao,Xueyong Zhang,Aili Li,Long Mao 한국식물학회 2015 Journal of Plant Biology Vol.58 No.4
Common wheat (Triticum aestivum) is an allohexaploid (AABBDD), with Triticum urartu (AA) and Aegilops tauschii (DD) as its A and D genome donors. Squamosa Promoter Binding Protein-Like (SPL) genes play important roles in plant development; however, a systematic study of this gene family in wheat is still lacking. Here, we mined the wheat genomes for SPLs and found 19 SPL genes each from the T. urartu and Ae. tauschii genomes. We also identified 58 SPL genes from the hexaploid wheat genome. We then compared the conservation and divergence of SPLs between the two diploid species in gene structures, tissuespecific expression patterns and responses to salt stress, drought and low temperature. For functional studies, two hexaploid wheat SPLs, TaSPL3 (with miR156 site mutated) and TaSPL6, were overexpressed in Arabidopsis and found to be involved in flowering time and biomass accumulation. In addition, a mutant allele (TaSPL6-D R ) with a 47 bp duplication upstream of the SBP domain was found to be associated with maturity date and grain number per spike among landraces from a Chinese wheat mini-core collection. Collectively, our work provides useful knowledge on the sequences and functions of wheat SPL genes that may help future functional studies and molecular breeding.
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