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Now showing items 1 - 16 of 99

  • Communities, Crime and Social Capital in Contemporary Chinaby Lena Y. Zhong

    Review by: Shumei Hou  

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  • Lena Y. Zhong, Communities, Crime and Social Capital in Contemporary China

    Mengyan Dai  

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  • Stresses induced in saturated asphalt pavements by moving wheel pressure

    Y. Zhong   Q. Xu  

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  • PDB56 - A Systematic Review Of Cost-Utility Analyses In Diabetes

    Y. Zhong   P.J. Lin   A. Winn   J.T Cohen   P.J. Neumann  

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  • Association of Janus kinase 2 (JAK2) polymorphisms with acute leukemia susceptibility

    Y. ZHONG   J. WU   R. MA   H. CAO   Z. WANG   J. DING   L. CHENG   J. FENG and B. CHEN  

    Introduction: Aberrant activation of Janus kinase (JAK)/signal transducer and activator of transcription (STAT) pathway leads to deregulated proliferation, differentiation, or apoptosis of normal cells. One of the members of this family, JAK2, plays a very important role in metabolizing carcinogens and medications. This study aimed to detect whether any association exists between genetic polymorphisms in JAK2 gene and individual susceptibility to acute leukemia.
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  • A study on the synthesis of nanostructured WC–10

    Y. Zhong   L. Shaw  

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  • Isothermal sorption characteristics of the BaCl2–NH3 pair in a vermiculite host matrix

    Y. Zhong   R.E. Critoph   R.N. Thorpe   Z. Tamainot-Telto   Yu.I. Aristov  

    Chemisorption could be useful in adsorption systems due to the large concentration change compared with physisorption. Equilibrium concentration characteristics of ammonia with a composite adsorbent material (BaCl 2 impregnated into a vermiculite matrix) are investigated: the maximum concentration is about 0.4kg ammonia/kg adsorbent. Hysteresis was observed between the synthesis and the decomposition reactions. The analysis of the data suggests that the hysteresis could be due to the dimensional changes of the solid during the reactions. The bi-variant behaviour observed was contrary to the mono-variant behaviour anticipated and the reasons are discussed. The COP of a basic adsorption cycle for typical ice-making and air-conditioning applications utilizing ammonia and the composite material were calculated. The results show that the material could be used for air-conditioning or other refrigeration applications. The COP could reach up to 0.6 at typical conditions ( Tev=15degC, Tcon=35degC). [All rights reserved Elsevier].
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  • Association of Janus kinase 2 (JAK2) polymorphisms with acute leukemia susceptibility

    Y. ZHONG   J. WU   R. MA   H. CAO   Z. WANG   J. DING   L. CHENG   J. FENG   B. CHEN  

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  • Dislocation structure evolution and characterization in the compression deformed Mn–Cu alloy

    Y. Zhong   F. Yin   T. Sakaguchi   K. Nagai   K. Yang  

    Dislocation densities and dislocation structure arrangements in cold compressed polycrystalline commercial M2052 (Mn-20Cu-5Ni-2Fe) high damping alloy with various strains were determined in scanning mode by X-ray peak profile analysis and electron backscatter diffraction (EBSD). The results indicate that the Mn-Cu-Ni-Fe alloy has an evolution behavior quite similar to the dislocation structure in copper. The dislocation arrangement parameter shows a local minimum in the transition range between stages III and IV that can be related to the transformation of the dislocation arrangement in the cell walls from a polarized dipole wall (PDW) into a polarized tile wall (PTW) structure. This evolution is further confirmed by the results of local misorientation determined by EBSD. In addition, during deformation, the multiplication of dislocation densities in the MnCu alloy is significantly slower than that in copper, and the transition of the dislocation structure is strongly retarded in the MnCu alloy compared with copper. These results can be explained by the mechanism of elastic anisotropy on the dislocation dynamics, as the elastic anisotropy in the MnCu alloy is larger than that in copper, which can strongly retard the multiplication of the dislocation population and the transformation of the dislocation structure. These results are important for research into the plastic working behavior of Mn-Cu-Ni-Fe high damping alloy. [All rights reserved Elsevier].
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  • Control Allocation Based Reconfigurable Flight Control for Aircraft with Multiple Control Effectors

    Y. Zhong   L. Yang   and G. Shen   Beijing University of Aeronautics and Astronautics   Beijing   China (prc)  

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  • Dislocation structure evolution and characterization in the compression deformed Mn–Cu alloy

    Y. Zhong   F. Yin   T. Sakaguchi   K. Nagai    K. Yang  

    Dislocation densities and dislocation structure arrangements in cold compressed polycrystalline commercial M2052 (Mn–20Cu–5Ni–2Fe) high damping alloy with various strains were determined in scanning mode by X-ray peak profile analysis and electron backscatter diffraction (EBSD). The results indicate that the Mn–Cu–Ni–Fe alloy has an evolution behavior quite similar to the dislocation structure in copper. The dislocation arrangement parameter shows a local minimum in the transition range between stages III and IV that can be related to the transformation of the dislocation arrangement in the cell walls from a polarized dipole wall (PDW) into a polarized tile wall (PTW) structure. This evolution is further confirmed by the results of local misorientation determined by EBSD. In addition, during deformation, the multiplication of dislocation densities in the MnCu alloy is significantly slower than that in copper, and the transition of the dislocation structure is strongly retarded in the MnCu alloy compared with copper. These results can be explained by the mechanism of elastic anisotropy on the dislocation dynamics, as the elastic anisotropy in the MnCu alloy is larger than that in copper, which can strongly retard the multiplication of the dislocation population and the transformation of the dislocation structure. These results are important for research into the plastic working behavior of Mn–Cu–Ni–Fe high damping alloy.
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  • The results of surgery for colorectal hepatic metastases following expansion of the indications in 2005

    Y. Zhong   D. Zhu   L. Liang   Q. Ye   Y. Wei   L. Ren   X. Pan   J. Fan   J. Xu and X. Qin  

    Safety and survival were investigated in patients treated according to expanded surgical indications for colorectal hepatic metastases.
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  • Dynamics of BaCl2–NH3 adsorption pair

    Y. Zhong   R.E. Critoph   R.N. Thorpe   Z. Tamainot-Telto  

    To obtain accurate kinetics of adsorption pairs, dynamic tests of a composite adsorbent material (BaCl2 impregnated into a vermiculite matrix) and ammonia were performed on small samples under isothermal conditions and on a larger quantity in a laboratory scale adsorption system. The experimental results show that the size of the pressure swing plays an important role in the dynamics of adsorption pairs. This driving pressure difference affects the mass transfer of NH3 through the pores of adsorbent and therefore the performance of the complete adsorption system. A modified Linear Driving Force (LDF) model was used to fit the experimental results. It was shown that the model can predict the dynamics of both adsorption and desorption fairly well and can be used for the modelling of the adsorption system and adsorption cycles.
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  • Dynamics of BaCl2–NH3 adsorption pair

    Y. Zhong   R.E. Critoph   R.N. Thorpe   Z. Tamainot-Telto  

    To obtain accurate kinetics of adsorption pairs, dynamic tests of a composite adsorbent material (BaCl 2 impregnated into a vermiculite matrix) and ammonia were performed on small samples under isothermal conditions and on a larger quantity in a laboratory scale adsorption system. The experimental results show that the size of the pressure swing plays an important role in the dynamics of adsorption pairs. This driving pressure difference affects the mass transfer of NH 3 through the pores of adsorbent and therefore the performance of the complete adsorption system. A modified Linear Driving Force (LDF) model was used to fit the experimental results. It was shown that the model can predict the dynamics of both adsorption and desorption fairly well and can be used for the modelling of the adsorption system and adsorption cycles.[All rights reserved Elsevier].
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  • EFFICIENT REFORMULATION OF THE THERMAL HIGHER-ORDER THEORY FOR FGMs WITH LOCALLY VARIABLE CONDUCTIVITY

    Y. Zhong   Y. Bansal   M. Pindera  

    Functionally graded materials are characterized by spatially variable microstructures introduced to satisfy given performance requirements. The graded microstructure gives rise to continuously or discretely changing properties, complicating the analysis of these materials. The majority of the computational techniques use the so-called uncoupled approach which ignores the effect of microstructural gradation by employing specific spatial material property variations that are either assumed or obtained by local homogenization. In contrast, the higher-order theory for functionally graded materials is a coupled approach which takes the effect of microstructural gradation into consideration and does not ignore the local-global interaction of the spatially variable inclusion phase(s). Despite its demonstrated utility, however, the original formulation of the higher-order theory is computationally intensive. Herein, an efficient reformulation of the higher-order theory for thermal problems, based on the local/global conductivity matrix approach, is presented in order to enable efficient analysis of graded materials with different length scales. The reformulation decreases the size of the global conductivity matrix by approximately sixty percent, enabling the modeling of realistic microstructures containing fine and coarse phases. In order to model fine phase microstructures efficiently, the higher-order theory is further extended to accommodate regions with spatially variable homogenized properties. Thus the effects occurring at the small-length scale can be modeled exactly or in an homogenized manner depending on the desired level of detail or accuracy. The accuracy of the reformulated and extended higher-order theory is validated through comparison with an exact analytical solution. A graded thermal barrier coating application with fine and coarse microstructural details is presented to highlight the reformulated theory's technological significance.
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  • Evaluation of the performance of solid sorption refrigeration systems using carbon dioxide as refrigerant

    Y. Zhong   R.E. Critoph and R. Thorpe  

    The refrigerant–adsorbent pairs at present mostly used in research on solid-sorption refrigeration cycles are ammonia–carbon, methanol–carbon, water–silica gel and water–zeolite. Porosity tests have been carried out on an alternative, carbon dioxide, as refrigerant with several types of carbon, zeolite and silica gel as adsorbent. The results of fitting to the Dubinin equation and modelling of cycles based on these pairs are presented. Due to its low latent heat, the performance of adsorption refrigeration systems using CO2 as refrigerant is poor. However, carbon dioxide may be useful where the toxicity and incompatibility of ammonia and copper is valued.
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