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Search Results: 1 - 10 of 6251 matches for " Meihua Lan "
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Polarization Filtering Method for Suppressing Surface Wave in Time-Frequency Domain  [PDF]
Xiaoming Yang, Yang Gao, Wenzhong Zhang, Yanchun Wang, Meihua Lan
International Journal of Geosciences (IJG) , 2019, DOI: 10.4236/ijg.2019.104028
Abstract: In order to suppress the surface wave in three-component seismic exploration, according to the polarization characteristics of body wave and surface wave, a time-frequency domain polarization filtering method based on wavelet transform was studied. A covariance matrix was constructed in the time-frequency domain for the three-component seismic data, measured the polarization parameters of seismic waves. Combining the corresponding eigenvalues and eigenvectors of the matrix, the elliptic rate and elevation angle were used as constraints, and the polarization filter function was built to separate the surface waves. The separated surface waves were inversely transformed and then were adaptively subtracted from the original records. After the polarization filtering suppressed the surface wave, the signal-to-noise ratio of the converted wave was effectively improved. It laid a good foundation for the next seismic data processing and seismic exploration development. The actual data processing results show that the method can effectively extract surface waves from three-component seismic records and avoid the interference of surface waves on seismic signals.
Understanding Motivation for Learning German among Chinese College Students: Comparing In-China and Study-Abroad Contexts  [PDF]
Meihua Liu
Creative Education (CE) , 2019, DOI: 10.4236/ce.2019.101013
Abstract: To understand motivation for learning German among Chinese college students in in-China and study-abroad (SA) contexts, the present study employed a mixed method to study 229 Chinese college students located in Beijing (N = 138) and Germany (N = 91). Quantitative data was collected through a 34-item questionnaire, and qualitative data was collected through 25 semi-structured interviews. The major findings were: 1) students in both contexts were largely integratively or instrumentally motivated to learn German, and 2) differences existed between the two groupsin specific motivations, motivation level, and effects of motivation.These findings in return justify the need for research on motivation for learning not-so-important foreign languages like German.
Stylistic Analysis of “40-Love” Written by McGough
Meihua Xu
Asian Social Science , 2009, DOI: 10.5539/ass.v5n6p118
Abstract: The aesthetical form has always been stressed in poetry. Efforts have been exerted on the skillful combination of rhythm and structure to create numerous great works all over the world. This article tries to analyze the unique features in structure, words, phonology, syntax and rhetoric in the poem of 40-Love by British poet Roger McGough in order to have a deeper understanding of the content and form of a poem.
An Empirical Study on the Writing Ability of College Students with the Error Analysis Approach
Meihua Wang
English Language and Literature Studies , 2013, DOI: 10.5539/ells.v3n2p54
Abstract: In English writing, learners’ language output errors are common and even inevitable. English teachers are confronted with various kinds of output errors made by students in the course of their teaching. This paper is a study on the errors in the English writings of 13 junior non-English major students. Through Error Analysis Approach, we learn that the problems of Chinese learners of English lie mostly in grammatical and lexical level. Among the detailed items, errors concerning the collocation of words at the lexical level, transitional devices at the textual level, and paratactic sentences, concurrent structure and subjective-predicate structure at the grammatical level occur most frequently. Then detailed analysis of these errors shows that, apart from the learner’s carelessness and incompetent knowledge of the target language, mother-tongue transfer is also an important reason that causes the English learners’ unsuccessful mastery of the target language.
Prediction and Diversion Mechanisms for Crowd Management Based on Risk Rating  [PDF]
Meihua Zhang, Yuan Yao, Kefan Xie
Engineering (ENG) , 2017, DOI: 10.4236/eng.2017.95021
Abstract: Studies of past accidents have revealed that various elements such as failure to identify hazards, crowd behaviors out of controlling, deficiency of the egress signage system, inconsistency between process behavior and process plan, and environmental constraints, etc. affected crowd evacuation. Above all, the human factor is the key issue in safety and disaster management, although it is bound to other factors inextricably. This paper explores crowd behaviors that may influence an urgent situation, and discusses the technique applied to the crowd prediction. Based on risk rating relative to crowd density, risk plans for different levels are proposed to dispose the potential threats. Also practical crowd management measures at different risk levels are illustrated in a case of a metro station in China. Finally, the strategies for crowd security management are advised that all stakeholders are amenable to form risk consciousness and implement safety procedures consistent with risk plans professionally and scientifically.
An Exploration of Foreign Language Anxiety and English Learning Motivation
Meihua Liu,Wenhong Huang
Education Research International , 2011, DOI: 10.1155/2011/493167
Abstract: Perceived to be two important affective variables, anxiety and motivation have been found to be highly correlated to second/foreign language acquisition. In order to examine the relationship between foreign language anxiety, English learning motivation, and performance in English, the present study investigated 980 undergraduate students from three universities in China who answered a 76-item survey. Analyses of the data revealed that (1) the respondents generally did not feel anxious in English and were moderately motivated to learn English, (2) foreign language anxiety and English learning motivation were significantly negatively correlated with each other, and (3) both foreign language anxiety and English learning motivation were significantly correlated with students' performance in English. Among the scales, foreign language classroom anxiety (FLCAS), intrinsic motivation (IntrinM), instrumental motivation (InstruM), fear of being negatively evaluated (FLCAS1), and interest in foreign languages and cultures (IFLC) proved to be powerful predictors for the latter.
Standing Wave Solutions for the Discrete Coupled Nonlinear Schr dinger Equations with Unbounded Potentials
Meihua Huang,Zhan Zhou
Abstract and Applied Analysis , 2013, DOI: 10.1155/2013/842594
Abstract:
A Study of Changes in Risk-taking and Sociability in Chinese University EFL Class
Wenxia Zhang,Meihua Liu
Theory and Practice in Language Studies , 2011, DOI: 10.4304/tpls.1.9.1218-1221
Abstract: This paper reports the results of a study of changes in risk-taking and sociability in Chinese university EFL class over a term. A 10-item survey involving 934 first-year undergraduates revealed that: (1) the students generally did not like to risk using English and were moderately sociable in English class both at the beginning and toward the end of the term; (2) the participants became significantly more risk-taking in English class over the term; (3) male students reported being significantly more risk-taking than their female counterparts both at the beginning and toward the end of the term; and (4) language class risk-taking and sociability were significantly correlated with each other and the students’ performance in English both at the beginning and toward the end of the term. As such, some implications for teaching and learning of English are discussed.
Paragraph-level Errors in Chinese Undergraduate EFL Learners‘ Compositions: A Cohort Study
Meihua Liu,Gehui Wang
Theory and Practice in Language Studies , 2011, DOI: 10.4304/tpls.1.6.584-593
Abstract: The present study investigated the paragraph-level errors in 90 English compositions produced by 30 Chinese undergraduate non-English majors on three tasks during eight weeks. Analyses of these errors and the survey data yielded the following main findings: (1) Among the four categories of paragraph-level errors, errors in paragraph development accounted for the largest percentage, followed by errors in paragraph coherence, errors in paragraph unity, and inconsistency in point of view. This pattern was generally observed for the distribution of the errors in each individual task; (2) the errors generally tended to increase across tasks. Errors in paragraph development in particular increased statistically significantly in the last two tasks; (3) the errors of all categories were generally inversely correlated with the students’ writing performance, among which errors in paragraph development were significantly inversely related to the latter, and (4) several reasons were identified for the errors such as the lack of writing practice and the influence of Chinese. Thus, it can be concluded that paragraph-level errors are often persistent in students’ English writing and are closely related to the quality of the writing. They hence deserve further research.
Process Optimization and its Impacts on Physical Properties of Instant Rice
Meihua Huang,Guoqing He
Advance Journal of Food Science and Technology , 2013,
Abstract: In order to develop production technology of instant rice, this study was undertaken with the soaking and processing conditions to improve the quality of instant rice. Soaking temperature, soaking time and adding amount of water were all investigated to select the optimal soaking condition by measuring water absorption and moisture content. Pseudo-level method of L9 (34) orthogonal design tests were adopted to optimize the cooking process by physical properties mainly including hardness, adhesiveness and moisture content. Results showed that physical properties had significant linear relationship with three processing factors by multiple linear regressions and the optimal cooking process was maintaining pressure at 80 KPa for 4 min and stewing rice for 15 min.
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