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Search Results: 1 - 10 of 104197 matches for " Yunhong Zhang "
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Relationship between perceptual and semantic levels of representation: An event-related potential study
YunHong Zhang,ChunYan Guo
Chinese Science Bulletin , 2008, DOI: 10.1007/s11434-008-0522-z
Abstract: An event-related potential study was conducted to make clear the relationships between perceptual and semantic levels of representation. Subjects judged the semantic relationship between a picture sample and a word match using the delayed match-to-sample paradigm. The experiment includes three types of matching trials, i.e., identical match trials, where the words had the same meanings as the pictures, categorical match trials where the words matched the pictures in category, and non-match trials where the words matched neither in identification nor in category with the pictures. The three conditions evoke significantly different N400-like and P300 ERP components. Specifically, for the N400-like negative responses, the averaged amplitude of the non-match condition is the largest and the most negative-going, that of the categorical match condition is less negative-going, and that of the identical match condition is the smallest among all three conditions. In addition, only the identical match condition evokes an early P300 component. As for the late P300 component, the averaged amplitude of the categorical match condition is more robust in the frontal brain areas. In contrast, ERPs of the non-match condition are stronger in the posterior brain areas. From 250 to 450 ms, the difference waves between the identical match and non-match conditions are located in the central areas, and the difference waves between categorical match and non-match conditions occur in the right frontal areas. Our results suggest that cross-form picture-word identical matching and categorical matching involve different underlying mechanisms. The existence of the early P300 component evokes by the identical match condition provides support for theories of template matching and facilitation model.
A Feasibility Study of Error Analysis on the Teaching of Chinese-English Translation—A Case Study of Non-English Major Freshmen in BUPT
Yunhong Zhang,Baoling Wang
Journal of Language Teaching and Research , 2011, DOI: 10.4304/jltr.2.1.170-177
Abstract: Error Analysis is one of the most common methods in statistics. According to Corder S. P (1967) error is significant to learners. This paper applies it to the teaching of Chinese-English translation. Taking a whole class as a research unit and by analyzing the common errors made by students in their homework, the researcher records the error types, numbers of each type of error as well as the corresponding frequencies separately. Then the researcher lists out the top six errors and calculates the total frequency of them (total percentage of the six errors occupied in the class). After the analysis, the teacher feedbacks the results to the students as well as explains the methods of error identification and correction. This paper compares two non-English major classes with 60 freshmen; one has adopted “Error Analysis” in the teaching of Chinese-English Translation, while the other has not. Finally after one semester, the class which has applied “Error Analysis” makes greater progress than the class not. From some aspects, the research does show that “Error Analysis Teaching Method” could promote the Chinese-English translating skills of non-English major freshmen. Though this research has its limitations, it is valuable in improving the traditional translation teaching strategies.
Sporadic Creutzfeldt-Jakob Disease Presenting with Visual Disturbance—A Case Report in China  [PDF]
Guohong Tian, Lin Sun, Yunhong He, Xiaojun Zhang
International Journal of Clinical Medicine (IJCM) , 2013, DOI: 10.4236/ijcm.2013.47057
Abstract: Creutzfeldt-Jakob disease (CJD) is a rare but fatal neurodegenerative prion disease. Classic CJD comprises a clinical triad of rapidly progressive dementia, myoclonus, and EEG abnormality. At initial presentation, this classic triad is present only in a minority of cases. Visual impairment is one of the predominant manifestations in the course of CJD, especially in Heidenhain variant phenotype. We reported a case presenting with progressive blurred vision, along with other neurological symptoms, who diagnosed as sporadic CJD with cortical blindness in China.

A Prediction Method of Protein Disulfide Bond Based on Hybrid Strategy  [PDF]
Pengfei Sun, Yunhong Ding, Yuyan Huang, Lei Zhang
Journal of Biomedical Science and Engineering (JBiSE) , 2016, DOI: 10.4236/jbise.2016.910B015
Abstract:
A prediction method of protein disulfide bond based on support vector machine and sample selection is proposed in this paper. First, the protein sequences selected are en-coded according to a certain encoding, input data for the prediction model of protein disulfide bond is generated; Then sample selection technique is used to select a portion of input data as training samples of support vector machine; finally the prediction model training samples trained is used to predict protein disulfide bond. The result of simulation experiment shows that the prediction model based on support vector ma-chine and sample selection can increase the prediction accuracy of protein disulfide bond.
Temporally and spatially resolved investigation on the efflorescence process of a mixed droplet of ammonium sulfate and ammonium nitrate
Feng Wang,YuXia Zheng,YunHong Zhang
Chinese Science Bulletin , 2011, DOI: 10.1007/s11434-011-4617-6
Abstract: Temporally and spatially resolved investigations of the efflorescence of equimolar mixtures of ammonium sulfate (AS) and ammonium nitrate (AN) aerosol droplets were performed by confocal Raman spectroscopy combined with high-speed photography. Information was obtained on the dynamic process of morphological changes and the heterogeneous distribution of efflorescence products. The supersaturated AS/AN mixed droplet was found to first precipitate as the double salt 3AN·AS when the relative humidity was 50%. The excess AS was irregularly distributed on the surface of the double salt as an inclusion structure. No formation of 2AN·AS was observed throughout the efflorescence process.
Micro-Raman investigations on the structures of the surface and the inner of MgSO4 droplets
Feng Wang,JingJing Shou,YunHong Zhang
Chinese Science Bulletin , 2008, DOI: 10.1007/s11434-008-0329-y
Abstract: Spherical MgSO4 droplets were deposited by a syringe on the hydrophobic Teflon substrate. Using micro-Raman technique, the laser beam was highly focused twice on the surface and in the center of spherical droplets. The Raman spectra for the surface and the inner of MgSO4 droplets were accordingly obtained, suggesting formation of a thin layer of gels on MgSO4 droplets at low relative humidity. The gel layer covered the surface and exhibited a significant delay in response to the change of ambient relative humidity, resulting in the structural difference between the surface and the inner of MgSO4 droplets.
Crystallization dynamics of supersaturated NaClO4 aerosols studied by high-speed photography
Feng Wang,LiJun Zhao,YunHong Zhang
Chinese Science Bulletin , 2008, DOI: 10.1007/s11434-008-0284-7
Abstract: Single supersaturated NaClO4 aerosol droplets on a quartz substrate were observed by a high-speed video camera for their morphologic changes with decreasing relative humidity (RH). The supersaturated droplets were found to form anhydrous NaClO4 at ~10% RH. Three stages were roughly observed in this process, i.e., the main stem appearance, primary and secondary branches growth, and the deep dehydration. The main stem grew steadily and finished in 120 ms. Affected by both crystal precipitation and water evaporation, primary branches grew for 1200 ms, accompanied by a slower growth of secondary branches. The deep dehydration was more complicated, and lasted for a longer time.
Neuropeptide Y receptors in a protozoaStylonychia mytilus
Xiaoyang He,Xiaoyun Zhang,Yunhong Zhen
Chinese Science Bulletin , 1998, DOI: 10.1007/BF02883818
Abstract: Radio ligand binding assays(RLBA) were used to study neuropeptide Y (NPY) receptors in a protozoaStylonychia mytilus. The experimental results showed that 2–3 × 103/mLStylonychia cells incubated in Pringsheim solution which contained3H-NPY could specifically bind3H-NPY and concoraitantly present saturable characteristic. This suggested thatStylonychia possessed some specific binding sites for NPY. Scatchard transformations of binding assay for the NPY receptors at 25°C are compatible with the specific activity of 42. 47 fmol/103 cells and the binding equilibrium constant of 0. 113 nmol/L. The data of125I-NPY binding assay to the membrane protein extract ofStylonychia indicated that there was a significant difference between the amount of total bound and nonspecific bound of125I-NPY. This result indicated that NPY receptors were probably localized mainly on the cell membrane.
State of water and its implications for supersaturated structures in Mg(NO3)2 aerosols
LiJun Zhao,QingXuan Zeng,YunHong Zhang
Chinese Science Bulletin , 2009, DOI: 10.1007/s11434-008-0508-x
Abstract: One technique based on the difference spectra was developed to study the state of water in supersaturated Mg(NO3)2 aerosols. The technique could be derived from the observation that the Raman scattering and infrared absorbance cross sections of molecular vibrations of interest remain practically constant from diluted solutions to supersaturated aerosols. The spectra of solvated water were obtained and primarily related to the first hydration layers of solute molecules in supersaturated Mg(NO3)2 aerosols. Based on this investigation, a chain structure was proposed to occur in the supersaturated Mg(NO3)2 aerosols at low relative humidities (RHs).
Neuropeptide Y receptors in a protozoa Stylonychia mytilus

Xiaoyang He,Xiaoyun Zhang,Yunhong Zhen,

科学通报(英文版) , 1998,
Abstract: Radio ligand binding assays(RLBA) were used to study neuropeptide Y (NPY) receptors in a protozoaStylonychia mytilus. The experimental results showed that 2–3 × 103/mLStylonychia cells incubated in Pringsheim solution which contained3H-NPY could specifically bind3H-NPY and concoraitantly present saturable characteristic. This suggested thatStylonychia possessed some specific binding sites for NPY. Scatchard transformations of binding assay for the NPY receptors at 25°C are compatible with the specific activity of 42. 47 fmol/103 cells and the binding equilibrium constant of 0. 113 nmol/L. The data of125I-NPY binding assay to the membrane protein extract ofStylonychia indicated that there was a significant difference between the amount of total bound and nonspecific bound of125I-NPY. This result indicated that NPY receptors were probably localized mainly on the cell membrane.
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