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Search Results: 1 - 10 of 56085 matches for " Ping Lu "
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Rigorous Coupled-Wave Approach for Sandwich Gratings  [PDF]
Xuehui Xiong, Ping Lu
Journal of Applied Mathematics and Physics (JAMP) , 2016, DOI: 10.4236/jamp.2016.48148
Abstract: Rigorous Coupled-Wave Approach (RCWA) has been used successfully and accurately to study simple grating structures, such as one-layer gratings, one-whole gratings. In this paper, RCWA is expanded to solve Sandwich gratings (SG), which is composed of two identical planar dielectric gratings adjoined by thin metallic or dielectric film. The electromagnetic analytic expressions for each layer of SG structure are given and rigorous coupled-wave equations are deduced. The numerical investigations for the diffraction spectra of SG by our theoretical and computer programs are in good agreement with the results of classical RCWA in the condition when a Sandwish grating is simplified to a classical one-layer grating. The calculations by our programs of another condition when a Sandwish grating is degenerated to a classical single planar structure also conform to the results of classical electromagnetic theory. The research results above indicate that the extended theoretical formula has backwards compatibility and is self-consistent with the classical theory.
The Effects of Trust and Contractual Mechanism on Working Relationships—An Empirical Study in Engineering Construction Projects  [PDF]
Shuping Guo, Ping Lu, Yinqiu Song
American Journal of Industrial and Business Management (AJIBM) , 2013, DOI: 10.4236/ajibm.2013.36062
Abstract: Inefficiency is usually one of the perceived ills within the construction projects and relationships among participants needing improvement. With the rising trend of partnerships in engineering construction projects, trust as an essential element in partnerships has become of increasing concern too. A growing stream of study has discussed the importance of trust in promoting interpersonal relationships among project participants. And formal contract has been closely watched which can mitigate exchange hazards. However, the relation between trust and contract is controversial. Based on cross-sectional survey data, regression analysis was used to test the impact of trust on satisfaction with working relationships and project performance in engineering construction projects in China. Likewise, the moderating effect of contractual mechanism on the relationship between trust and working relationships is explored. The results show that working relationships are positively associated with trust and satisfying working relationships have significant impact on project performance. The empirical findings also support the moderating effect of contractual mechanism. The conclusions enrich the research of working relationship, and provide some practical implications for enterprises.
Numerical Simulation of a Wind-Sand Flow
Ping Lu,Zhibao Dong
Online Journal of Earth Sciences , 2012,
Abstract: A theoretical model for wind-sand flow is developed by consideration of coupling among wind flow, sand particle motion and the Magnus effect under different atmospheric stability conditions. Using this model, the characteristics of the movement of wind and sand in the wind-sand flow are discussed in detail. The results show that the atmospheric stability and the Magnus effect both have a strong effect on wind profiles and on the trajectories of sand particles and that these effects produce results with different characteristics from those previously reported in the study, which apply only to neutral stability: The saltating sand reaches a greater height under non-neutral stability than under neutral stability, while the maximum horizontal distance is higher under unstable conditions and is smaller under stable conditions than under neutral stability.
Learners’ Needs Analysis of a New Optional College English Course—Interpreting for Non-English Majors
Ping Li,Zhihong Lu
Theory and Practice in Language Studies , 2011, DOI: 10.4304/tpls.1.9.1091-1102
Abstract: Following rapid social development and educational policy orientation in China, higher institutions are developing new optional courses in English. One of these courses is interpreting for non-English majors (IFNEM), which requires a needs analysis (NA) at the beginning. However, few studies have been found on the NA of an IFNEM, empirical ones in particular. In the limited empirical research, merely sophomore students' needs were surveyed through a single questionnaire, leaving many practical issues to be further explored. To advance the current body of research, the authors of this paper designed a complex structured questionnaire based on Hutchinson and Waters’s Framework for Analyzing Learning Needs, delivered it to 104 freshmen and 52 junior students and conducted follow-up interviews with eight of them who had given typical answers in this questionnaire. Such issues were investigated as students’ motivation for taking an IFNEM, their anticipated goals and objectives of the course, course entry requirements (if there should be any), selection of teaching content and materials and teaching environments. Results showed that the students highly approved of establishing an IFNEM for mainly Surface Motivation and wished for no entry requirements; however, limited by their current English proficiency, they aimed to improve both interpreting skills and English listening and speaking abilities. This study attempts to offer insights into the curriculum design of IFNEM and other optional courses in English for higher institutions.
Methodology of pharmacodynamic evaluation on Chinese herbal medicine based on syndrome differentiation
Ai-ping LU
Zhong Xi Yi Jie He Xue Bao , 2009,
Abstract: The clinical application of Chinese herbal medicine should be based on syndrome differentiation in traditional Chinese medicine (TCM), and the pharmacological evaluation of herbal medicine in new drug discovery should be also based on the TCM syndrome differentiation. To clarify the Chinese herbal characteristics and mechanisms of action through pharmacological experiments is not only the inevitable requirement for Chinese herb modernization and internationalization, but also the key way to direct the clinical rational administration. Thus how to characterize the syndrome type in commonly used animal disease models becomes the key issue in pharmacological evaluation. Following the development of biomedicine, one important way to clarify the syndrome characteristics of animal disease model in the pharmacological evaluation is to compare the differences between the responsive and non-responsive animals, and to find out the responsiveness-related biocharacteristics. An important approach to set up the Chinese herbal pharmacological evaluation which is suitable for Chinese medicine differentiation is to utilize the method of surveying syndrome type with Chinese herb formula and select the responsive animal model to reflect certain syndrome type, and furthermore to clear up the syndrome characteristics of the animal model by investigating its modern biological basis and establishing the correct indications of special TCM syndrome type. This pharmacological evaluation way based on finding out the responsiveness-related biocharacteristics of herbal medicine could become more effective in evaluating drug effects, further improving the new drug discovery, and developing Chinese herbal medicine.
Correlations of clinical symptoms and treatment efficacy in patients with rheumatoid arthritis treated with Chinese herbal drugs or Western medicine
LU Ai-Ping
Zhong Xi Yi Jie He Xue Bao , 2005,
Abstract: Objective: To evaluate the correlations between clinical symptoms and treatment efficacy in patients with rheumatoid arthritis (RA). Methods: Four hundred and thirteen patients were included in the clinical trial from 9 clinical centers. They were randomly divided into Western medicine-treated group with 204 cases and Chinese herbal drug-treated group with 209 cases. Eighteen clinical symptoms were evaluated before and after treatment. The Western medicine therapy included voltaren extended release tablets, methotrexate and sulfasalazine. The Chinese herbal drug therapy included glucosidorum Tripterygii totorum tablets and Yishen Juanbi Tablets combined with treatment based on syndrome differentiation. The American college of rheumatology 20 (ACR20) was used as efficacy evaluation criteria. Results: In the Chinese herbal drug-treated group, clinical symptoms such as arthralgia and tenderness of joints were positively correlated with the efficacy after 12-week treatment, while frequent urination at night was negatively correlated. In the same group, tenderness of joints and fever were positively correlated with the efficacy after 24-week treatment, while deep-colored and turbid urine was negatively correlated. In the Western medicine-treated group, tenderness of joints and thirst were positively correlated with the efficacy after 12-week treatment, while vertigo was negatively correlated. And in the same group, tenderness of joints was positively correlated with the efficacy after 24-week treatment, while heaviness of limbs was negatively correlated to the efficacy. The statistical results showed that the treatment efficacy was improved when the correlated symptoms were included in the indications. Conclusion: The treatment efficacy of RA is correlated with some symptoms, so further studies should proceed on these correlations in order to achieve better treatment outcome.
Methodological thoughts about research of standardized clinical protocols of traditional Chinese medicine
Ai-Ping LU
Zhong Xi Yi Jie He Xue Bao , 2006,
Abstract: The treatment of traditional Chinese medicine (TCM) has been proved effective in clinical practice for thousands of years. To standardize the clinical protocols of TCM is absolutely necessary for enhancing the research quality of TCM and expanding the international influence of TCM. The standardization research on clinical protocols of TCM should be based on the basic theory of TCM and in the light of good clinical practice (GCP) principles. The clinical criteria for both diagnosis and efficacy evaluation of disease are also needed. To include all symptoms, tongue manifestations and pulse presentations into case report form, and to compare the differences in these clinical parameters between effective and non-effective cases by multivariate analysis may be helpful to find more specific indications for therapeutic protocol of TCM. Furthermore, It is suggested that two or more clinical trials on one therapeutic protocol are needed to identify its accurate indications.
Advantages and Difficulties of Chinese Learning as a Foreign Language in Taiwan
Guo-ping LU
Cross-Cultural Communication , 2005, DOI: 10.3968/1734
Abstract: this article discussed that how does Taiwan deal with the trend and demands of Chinese learning in globalization when “Chinese century” is coming in 21 century. It is because that there was no strong competition in Chinese market, Taiwan had been the main destination that people studied the Chinese in the world before the reform and opening-up of China’s Mainland. Taiwan always keeps stable amount that people come here and learn the Chinese in Taiwan. Taiwan has trained hundreds and thousands of Chinese talents for more than one hundred countries in the world. However, in the pass 20 years, because of the economic grows of China, this change leading the global fever in Chinese. The global market of Chinese teaching suffer unprecedented impacts and challenges because most of the international personage turned to the continent area, where the living stander was improved fast, studying Chinese. If we analyzed with the concept “this is a sound right to international nation when we own the advantages Chinese teaching in the world”, Taiwan loses international visibility gradually. How to deal with this great challenge and how much will Taiwan do hard-working in this field? What kinds of fault will produce? All questions we will find in this text. Besides, Taiwan will gain what kind of advantages in the upsurge of “fever for Chinese” in the future. How does Taiwan to improve the foreign market of Chinese teaching and the stresses of international. This is a point of view this text wanted to point it. Key words: Taiwan, Teaching of Chinese, predicament, advantage, fever for Chinese Résumé : Cet article pose la question de la position de Taiwan face à la mode et la demande d’apprentissage du chinois dans le contexte de mondialisation, alors que le 21ème siècle est annoncé comme étant celui de la Chine. En raison de l’absence de concurrence sur le marché chinois, Taiwan a été la principale destination dans le monde des gens désirant apprendre le chinois jusqu’à la réforme et l’ouverture de la République Populaire de Chine. Taiwan continue d’accueillir un volume stable d’étrangers venant apprendre le chinois. Taiwan a en effet formé des centaines et des milliers de talents chinois pour plus de cent pays à travers le monde. Néanmoins, au cours des vingt dernières années, en raison de la croissance économique de la Chine, l’engouement général pour le chinois se déplace. Le marché global de l’apprentissage du chinois a souffert des bouleversements et des défis jusque là inconnus, dus à l’afflux des étrangers désireux d’apprendre le chinois vers désormais le continent,
Gutzwiller Approximation in Degenerate Hubbard Models
Jian Ping Lu
Physics , 1996, DOI: 10.1142/S0217979296002026
Abstract: Degenerate Hubbard models are studied using the Generalized-Gutzwiller-Approximation. It is found that the metal-insulator transition occurs at a finite correlation $U_c$ when the average number of electrons per lattice site is an integer. The critical $U_c$ depends sensitively on both the band degeneracy $N$ and the filling $x$. A derivation is presented for the general expression of $U_c(x,N)$ which reproduces all previously known Gutzwiller solutions, including that of the Boson Hubbard model. Effects of the lattice structure on the metal-insulator transition and the effective mass are discussed.
The Shape of Bucky Onions
Jian Ping Lu
Physics , 1993,
Abstract: The morphology of Bucky onions is investigated by {\it ab initio} calculations using Yang's new $O(N)$ method. It is found that for large single shell fullerenes with $I_h$ symmetry, the spherical morphology has the lower energy than that of polyhedrons. The formation energy per atom follows a simple scaling law. Including an estimate of inter-shell van de Waals interactions leads to the conclusion that spherical multiple shell Bucky onions are likely the most stable structure of large carbon clusters. These results are in good agreement with recent observation.
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