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Search Results: 1 - 10 of 8533 matches for " Xiangyun DENG "
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New Design for Energy Saving Water Dispensers  [PDF]
Xiangyun Huang
Journal of Power and Energy Engineering (JPEE) , 2015, DOI: 10.4236/jpee.2015.34059
Abstract:

This article is in view of the existing water dispensers’ repeated heating, large energy consumption and fresh water quality’s problem, designed a new type energy saving water dispenser with the function of rapid cooling-or-heating. Anhydrous bravery structure is used in the water dispensers in drinking water flow process to cool or heat it, so as to ensure the water quality fresh. Among them, the application of semiconductor refrigeration technology achieved collecting heat and preheating the water [1], which is called the initial heating. Cooperating with the secondary heating of the electrothermal quartz heating tube, the water dispensers really realize the flowing liquid heating, bid farewell to the so-called thousand-times boiling water and improve the heat energy utilization greatly [2].

Ferroelectricity of nanocrystalline BaTiO3 ceramics by first principle calculation
XiangYun Deng,HaiTao Zhang,Ting Li,DeJun Li,JianBao Li,XiaoHui Wang,LongTu Li
Chinese Science Bulletin , 2010, DOI: 10.1007/s11434-009-3670-x
Abstract: The vibrational modes of BaTiO3 in different crystalline phases have been investigated by means of density functional theory pseudo potential method. The evidence of tetragonal to orthorhombic and orthorhombic to rhombohedral phase transitions present for 8 nm BaTiO3 ceramics further demonstrates that the similar successive transitions in 8 nm BaTiO3 ceramics from rhombohedral to orthorhombic, tetragonal and cubic transitions are as those in coarse BaTiO3 ceramics.
In vitro comparison of the hemocompatibility of diamond-like carbon and carbon nitride coatings with different atomic percentages of N
MengLi Zhao,DeJun Li,YiTeng Zhang,MeiXian Guo,XiangYun Deng,HanQing Gu,RongXin Wan
Science China Life Sciences , 2012, DOI: 10.1007/s11427-012-4308-9
Abstract: Carbon nitride (CN x ) and diamond-like carbon (DLC) coatings were prepared by dc magnetron sputtering at room temperature. Different partial pressures of N2 were used to synthesize CN x to evaluate the relationship between the atomic percentage of nitrogen and hemocompatibility. Auger electron spectroscopy and atomic force microscopy indicated atomic percentages of N of 0.12 and 0.22 and that the CN x coatings were smooth. An in vitro study of the hemocompatibility of the coatings revealed that both CN x coatings had better anticoagulant properties and lower platelet adhesion than DLC. Compared with CN0.12, the CN0.22 coating showed longer dynamic clotting time (about 42 min), static clotting time (23.6 min) and recalcification time (45.6 s), as well as lower platelet adhesion (102 cells μm 2), aggregation, and activation. The presence of nitrogen in the CN x coatings induced their enhanced hemocompatibility compared with DLC.
Heat Induced Capsid Disassembly and DNA Release of Bacteriophage λ
Xiangyun Qiu
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0039793
Abstract: Successive structural changes of bacteriophage upon heating were characterized with quantitative experimental methods. In the commonly used Tris-Mg buffer, differential scanning calorimetry measurements first established that the protein capsid of phage melts at 87°C and its genomic DNA melts at 91°C. Interestingly, prior to the capsid melting, DNA was found to escape out of the capsid and subject to DNase digestion above 68°C, as concluded from light scattering, UV absorption, and electron microscopy studies. Further investigations indicated distinct temperature-dependent behaviors of the three phage proteins. Around 68°C, disruption of the tail first occurs and leads to the escape of DNA; above the capsid melting temperature of 87°C, the auxiliary protein gpD of the phage head remains soluble in solution and resists centrifugal sedimentation, whereas the major capsid protein gpE is easily precipitated and likely exists as aggregates.
Location for the Left Eigenvalues of Quaternionic Matrix
Xiangyun Chen
Journal of Mathematics Research , 2010, DOI: 10.5539/jmr.v2n4p141
Abstract: The purpose of this paper is to locate and estimate the left eigenvalues of quaternionic matrices. We present some distribution theorems for the left eigenvalues of square quaternionic matrices based on the generalized Gerschgorin theorem and generalized Brauer theorem.
Training-Based SWIPT: Optimal Power Splitting at the Receiver
Xiangyun Zhou
Computer Science , 2014,
Abstract: We consider a point-to-point system with simultaneous wireless information and power transfer (SWIPT) over a block fading channel. Each transmission block consists of a training phase and a data transmission phase. Pilot symbols are transmitted during the training phase for channel estimation at the receiver. To enable SWIPT, the receiver adopts a power-splitting design, such that a portion of the received signal is used for channel estimation or data detection, while the remaining is used for energy harvesting. We optimally design the power-splitting ratios for both training and data phases to achieve the best ergodic capacity performance while maintaining a required energy harvesting rate. Our result shows how a power-splitting receiver can make the best use of the received pilot and data signals to obtain the optimal SWIPT performance.
Influence of Ar/N2 Flow Rate on Structure and Property for TaN/NbN Multilayered Coatings
Xuehua ZHANG,Yuanbin KANG,Sipeng LIU,Qiang LI,Ying YANG,Xiangyun DENG,Dejun LI,
Xuehua
,ZHANG,Yuanbin,KANG,Sipeng,LIU,Qiang,LI,Ying,YANG,Xiangyun,DENG,Dejun,LI

材料科学技术学报 , 2007,
Abstract: TaN/NbN multilayered coatings with nanoscale bilayer periods were synthesized at different Ar/N2 flow rates by RF (radio frequency) magnetron sputtering. XRD (X-ray diffraction) and Nano Indenter System were employed to investigate the influence of Ar/N2 flow rate (FAr:FN2) on microstructure and mechanical properties of the coatings. The low-angle XRD pattern indicated a well-defined composition modulation and layer structure of the multilayered coating. All multilayered coatings almost revealed higher hardness than the rule-of-mixtures value of monolithic TaN and NbN coatings. At FAr:FN2=10, the multilayered coating possessed desirable hardness, elastic modulus, internal stress, and fracture resistance, compared with ones synthesized at other Ar/N2 flow rates. The layered structure with strong mixture of TaN (110), (111), (200) and Nb2N (101)textures should be related to the enhanced mechanical properties.
Adsorption and adhesion of blood proteins and fibroblasts on multi-wall carbon nanotubes
DeJun Li,Li Yuan,Ying Yang,XiangYun Deng,XiaoYing Lü,Yan Huang,Zheng Cao,Hao Liu,XueLiang Sun
Science China Life Sciences , 2009, DOI: 10.1007/s11427-009-0049-9
Abstract: This article concerns the investigation of blood protein adsorption on carbon paper and multi-wall carbon nanotubes (MWCNTs). Mouse fibroblast cell adhesion and growth on MWCNTs was also studied. The results showed that fibrinogen adsorption on carbon paper was much lower than that on MWCNTs, which means that platelets readily aggregate on the surface of MWCNTs. Mouse fibroblast cells implanted on MWCNTs tended to grow more prolifically than those implanted on carbon paper. The cell concentration observed on MWCNTs increased from 1.2×105/mL for a single day culture to 2×105/mL for a 7-day culture. No toxicity reaction was observed during the culturing period. These results indicated that MWCNTs possessed excellent tissue compatibility.
Adsorption and adhesion of blood proteins and fibroblasts on multi-wall carbon nanotubes

DeJun Li,Li Yuan,Ying Yang,XiangYun Deng,XiaoYing Lü,Yan Huang,Zheng Cao,Hao Liu,XueLiang Sun,

中国科学C辑(英文版) , 2009,
Abstract: This article concerns the investigation of blood protein adsorption on carbon paper and multi-wall carbon nanotubes (MWCNTs). Mouse fibroblast cell adhesion and growth on MWCNTs was also studied. The results showed that fibrinogen adsorption on carbon paper was much lower than that on MWCNTs, which means that platelets readily aggregate on the surface of MWCNTs. Mouse fibroblast cells implanted on MWCNTs tended to grow more prolifically than those implanted on carbon paper. The cell concentration observed on MWCNTs increased from 1.2×105/mL for a single day culture to 2×105/mL for a 7-day culture. No toxicity reaction was observed during the culturing period. These results indicated that MWCNTs possessed excellent tissue compatibility. Supported by open-program of State Key Laboratory of Bioelectronics, Southeast University.
On third-order three-point right focal boundary value problems
Xiangyun Wu,Zhanbing Bai
Tamkang Journal of Mathematics , 2008, DOI: 10.5556/j.tkjm.39.2008.317-324
Abstract: In this paper, a fixed point theorem in a cone, some inequalities of the associated Green's function and the concavity of solutions are applied to obtain the existence of positive solutions of third-order three-point boundary value problem with dependence on the first-order derivative $egin{cases}& x'''(t) = f(t, x(t), x'(t)), quad 0 < t < 1, & x(0) = x'(eta) = x''(1) = 0, end{cases}$where $f:[0, 1] imes[0, infty) imes R o [0,infty)$ is a nonnegative continuous function, $etain(1/2, 1).$
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