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Search Results: 1 - 10 of 148716 matches for " WANG Yao-Jin "
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Study of the dipole rotation path of BaTiO3 single crystal based on dielectric properties in structure phase transition

Li Xiao-Bing,Zhao Xiang-Yong,Wang Yao-Jin,Wang Fei-Fei,Chen Chao,Luo Hao-Su,

物理学报 , 2009,
Abstract: 在不同频率和偏置电场下测量了BaTiO3晶体从三方相到正交相再到四方相相变过程中的介电温谱.基于BaTiO3晶体在电场作用下的偶极子偏转假设和介电特性实验结果,提出BaTiO3各结构相在电场作用下的偶极子偏转路径可以由其相邻相的介电常数随温度的变化特性表现出来.推断出各结构相的偶极子偏转路径,以及偏置电场对偶极子偏转路径的影响.
Optical Dispersion Behavior and Band Gap Energy of Relaxor Ferroelectric 0.92Pb(Mg1/3Nb2/3)O3-0.08PbTiO3 Single Crystal

LIN Yan-Ting,REN Bo,ZHAO Xiang-Yong,WANG Fei-Fei,WANG Yao-Jin,XU Hai-Qing,LIN Di,LUO Hao-Su,

中国物理快报 , 2009,
Abstract: Refractive indices and extinction coefficients of 0.92Pb(Mg1/3Nb2/3)O3-0.08PbTiO3(PMN-0.08PT) single crystal are investigated by variable angle spectroscopic ellipsometry (VASE) at different wavelengths. The parameters relative to the energy band structure are obtained by fitting to the single-oscillator dispersion equation, and the band gap energy is also deduced from the Tauc equation. Similar to most oxygen-octahedra ferroelectrics, PMN-0.08PT has the same dispersion behavior described by the refractive-index dispersion parameters.
Bioaccumulation of Mercury in Crassostrea sp. Exposed to Waste Seawater Discharged from a Coal-fired Power Plant Equipped with a Seawater Flue-gas Desulfuriaztion System
巨牡蛎(Crassostrea sp.)对燃煤电厂脱硫海水中汞的生物累积

LIU Xi-yao,YUAN Dong-xing,CHEN Yao-jin,

环境科学 , 2013,
Abstract: A field experiment was conducted to study mercury (Hg) bioaccumulation in Crassostrea sp. exposed to waste seawater discharged from a coal-fired power plant equipped with a flue gas desulfurization system. Oysters were cultured in the discharge outlet of the power plant (studying site) and a control site, respectively. The total Hg (THg) concentrations (all counted as dry weight) of seawater in the studying and control sites were determined as (120.6±55.5)ng·L-1 (n=5) and (2.7±1.0)ng·L-1 (n=5), respectively, while methyl Hg (MeHg) concentrations were (0.30±0.44)ng·L-1 (n=5) and(0.28±0.31)ng·L-1 (n=5), respectively. The THg in oyster at the studying site increased dramatically from (138.3±14.3)ng·g-1 (n=6) to (3012±289)ng·g-1 (n=6) within 7 d, and remained at high levels of 2935-4490 ng·g-1 for the next 34 d. In contrast, the THg in oyster at the control site showed no significant change, and kept at low levels of 60.7-137.5 ng·g-1. After 41 d exposure, the MeHg in oyster at the studying site had no significant change, ranging from 55.4 ng·g-1 to 73.1 ng·g-1, and the content at the control site showed a slight decrease, ranging from 15.6 to 55.6 ng·g-1. The study showed that THg in the waste seawater discharged at the coal-fired power plant could be quickly bioaccumulated by oyster to a great extent, the potential risk can thus not be ignored. MeHg concentration in the waste seawater was quite low, and no obvious bioaccumulation was found in oyster. Under the study conditions, no self-synthesis of MeHg or transformation of inorganic Hg into MeHg was found.


物理学报 , 1965,
Abstract: 本文在配位场理论中利用普遍的静电相互作用参数,计算了红宝石吸收线的位置,结果比前人稍有改善。讨论了这些参数与分子轨道的关系,利用了二个共价键参数和自由离子参数,虽然引入的参数很少,但所得结果与上面的计算相近,并定出Nπ≌0.92,Nσ≌0.89。计算了推广等效自旋哈密顿中的参数,发现修正项中的g因子是来自四级微扰的贡献,其数量级约为10-5。得到了红宝石R线的等效哈密顿。
Studies on the optimal culture conditions of Aureobasidium pullulans to produce exopolysaccharides  [PDF]
Jinlong Ma, Guobin Jiang, Shanjing Yao, Hua Jin, Changhai Wang
Journal of Biomedical Science and Engineering (JBiSE) , 2012, DOI: 10.4236/jbise.2012.54027
Abstract: In the current study, in order to change the permeability of cell membrane and solve the problem of linked group of fungi mycelium, the method of adjusting osmotic pressure of medium and adding tween-80 was established. The utilized strain with relatively high exopolysaccharide (EPS) yield and low pigment level was obtained after the rejuvenation and sifting of long-preserved Aureobasidium pullulans strain. The optimal proportion of substrate was determined by means of orthogonal test. The transformation ratio of EPS was increased by 10% - 20% and the pigment content was greatly reduced. The fermenting liquor is between creamy white and pale yellow, and the white primary product can be gained without decolourization step. Furthermore, to magnify to 5 L bioreactor can get the similar result.
Determination of the Triplet State Lifetime of C60 /Toluene Solution and C60 Thin Films by Pump-Probe Method  [PDF]
Cheng Bao Yao, Elisee Kponou, Yun Dong Zhang, Jin Fang Wang, Ping Yuan
Optics and Photonics Journal (OPJ) , 2011, DOI: 10.4236/opj.2011.12013
Abstract: Excited state lifetimes of C60/toluene solution and C60 films macromolecular were measured by pump-probe method. Relation between optical switching effect of material and pulse width of pumping field is briefly described. It is found that the faster switching speed of light is, the triplet state lifetime is shorter. A He-Ne laser, as a probe, passed through the sample in the pump-probe experiment. All-optical switching effect was realized. Changing the optical power of the pumping field, switching response of the sample and modulation depth were investigated. In certain experimental conditions, relation between transmission through the sample and response were measured by an oscilloscope. Triple state lifetime of the molecule is speculated. The result showed that C60/toluene solution and C60 film have a fast response time. They would be utilized in some applications, such as optical switches, photonic devices.
The Study of Chinese Real Estate Enterprises Issuing Perpetual Bonds Financing: Advantage and Risk  [PDF]
Yao Jin
American Journal of Industrial and Business Management (AJIBM) , 2014, DOI: 10.4236/ajibm.2014.412076
Abstract: In recent years, with the regulation of national policy, Chinese real estate market has been rapidly cooling, and real estate enterprises also have difficulties in financing. Perpetual bonds as a historic mezzanine financial instrument abroad was formally introduced into China in 2013 and its own characteristics can satisfy the current needs of the real estate enterprises. This paper analyzes the plight of the real estate market and real estate financing under the current environment, discusses the issue of perpetual debt financing, and analyzes the advantages and risks of issuing perpetual bonds in multiple aspects.
Attenuation of Cross-Flow Fan Noise Using Porous Stabilizers
Huanxin Lai,Meng Wang,Chuye Yun,Jin Yao
International Journal of Rotating Machinery , 2011, DOI: 10.1155/2011/528927
Abstract: This paper presents a qualitative analysis of controlling the cross-flow fan noise by using porous stabilizers. The stabilizer was originally a folded plate. It is changed into a porous structure which has a plenum chamber and vent holes on the front wall. In order to investigate the influences of using the porous stabilizers, experiments are carried out to measure the cross-flow fan aerodynamic performances and sound radiation. Meanwhile, the internal flow field of the fan is numerically simulated. The results show that the porous stabilizers have not produced considerable effect on the cross-flow fan's performance curve, but the noise radiated from the fan is strongly affected. This indicates the feasibility of controlling the cross-flow fan noise by using the porous stabilizers with selected porosity. 1. Introduction In order to improve the nowaday indoor environment for daily life and work, air-conditioners are becoming widely used [1]. Because cross-flow fans (CFFs) generally have large capacities of mass flow and are compact in size [2–5], they are often used to move air in the air conditioners. However, a CFF is also well known for the complex flow configuration, such as the irregular geometry of the impeller and the stabilizer. As a result, the internal flows of CFF are very complex, while the eccentric vortex is a typical phenomenon [6]. An illustration of the internal flow-field of a CFF is shown in Figure 1. These complexities have made it difficult to form a universal designing theory for CFF, and therefore, the flow efficiencies of the CFF are relatively poor [7–9], as compared with axial or centrifugal fans. Figure 1: Typical flow pattern in a cross-flow fan. Noise radiation from CFF is a very important issue of concern for indoor environment. In order to attenuate the noise radiation from the CFF, Koo et al. [7] and Tsai et al. [10] used skewed stabilizers and skewed rotors, respectively. Because the spanwise size of a CFF is generally several times larger than the radial size, it is possible to skew the impeller and/or the stabilizer so as to avoid the blades at different axial locations pass the stabilizer simultaneously. On the other hand, Moon et al. [4] tried to modulate the blade passing frequency noise by using random-pitch impellers. All these considerations are aimed at weakening the vortical flow impingements on the stabilizer. Indeed, some effects in cutting down the noise radiation have been achieved by using these methods. Porous media are widely used in sound controlling. Generally, porous materials are applied to wrapping
1-(2,3,4,6-Tetra-O-acetyl-β-d-glucopyranosyl)-3-thioureidothiourea monohydrate
Weidong Sun,Jin Yao,Lifei Bai,Xiaoming Wang
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536808043833
Abstract: In the title compound, C16H24N4O9S2·H2O, the hexopyranosyl ring adopts a chair conformation (4C1), and the five substituents are in equatorial positions. In the crystal structure, extensive O—H...O, N—H...S and N—H...O hydrogen bonding leads to the formation of a three-dimensional network.
Temporally and Spatially Constrained ICA of fMRI Data Analysis
Zhi Wang, Maogeng Xia, Zhen Jin, Li Yao, Zhiying Long
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0094211
Abstract: Constrained independent component analysis (CICA) is capable of eliminating the order ambiguity that is found in the standard ICA and extracting the desired independent components by incorporating prior information into the ICA contrast function. However, the current CICA method produces constraints that are based on only one type of prior information (temporal/spatial), which may increase the dependency of CICA on the accuracy of the prior information. To improve the robustness of CICA and to reduce the impact of the accuracy of prior information on CICA, we proposed a temporally and spatially constrained ICA (TSCICA) method that incorporated two types of prior information, both temporal and spatial, as constraints in the ICA. The proposed approach was tested using simulated fMRI data and was applied to a real fMRI experiment using 13 subjects who performed a movement task. Additionally, the performance of TSCICA was compared with the ICA method, the temporally CICA (TCICA) method and the spatially CICA (SCICA) method. The results from the simulation and from the real fMRI data demonstrated that TSCICA outperformed TCICA, SCICA and ICA in terms of robustness to noise. Moreover, the TSCICA method displayed better robustness to prior temporal/spatial information than the TCICA/SCICA method.
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