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Search Results: 1 - 10 of 24657 matches for " Mei Yao "
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Dynamic Bandwidth Allocation Based on Online Traffic Prediction for Real-Time MPEG-4 Video Streams
Yao Liang,Mei Han
EURASIP Journal on Advances in Signal Processing , 2007, DOI: 10.1155/2007/87136
Abstract: The distinct characteristics of variable bit rate (VBR) video traffic and its quality of service (QoS) constraints have posed a unique challenge on network resource allocation and management for future integrated networks. Dynamic bandwidth allocation attempts to adaptively allocate resources to capture the burstiness of VBR video traffic, and therefore could potentially increase network utilization substantially while still satisfying the desired QoS requirements. We focus on prediction-based dynamic bandwidth allocation. In this context, the multiresolution learning neural-network-based traffic predictor is rigorously examined. A well-known-heuristic based approach RED-VBR scheme is used as a baseline for performance evaluation. Simulations using real-world MPEG-4 VBR video traces are conducted, and a comprehensive performance metrics is presented. In addition, a new concept of renegotiation control is introduced and a novel renegotiation control algorithm based on binary exponential backoff (BEB) is proposed to efficiently reduce renegotiation frequency.
Dynamic Bandwidth Allocation Based on Online Traffic Prediction for Real-Time MPEG-4 Video Streams
Liang Yao,Han Mei
EURASIP Journal on Advances in Signal Processing , 2007,
Abstract: The distinct characteristics of variable bit rate (VBR) video traffic and its quality of service (QoS) constraints have posed a unique challenge on network resource allocation and management for future integrated networks. Dynamic bandwidth allocation attempts to adaptively allocate resources to capture the burstiness of VBR video traffic, and therefore could potentially increase network utilization substantially while still satisfying the desired QoS requirements. We focus on prediction-based dynamic bandwidth allocation. In this context, the multiresolution learning neural-network-based traffic predictor is rigorously examined. A well-known-heuristic based approach RED-VBR scheme is used as a baseline for performance evaluation. Simulations using real-world MPEG-4 VBR video traces are conducted, and a comprehensive performance metrics is presented. In addition, a new concept of renegotiation control is introduced and a novel renegotiation control algorithm based on binary exponential backoff (BEB) is proposed to efficiently reduce renegotiation frequency.
Is Globalization Changing the Culture from Movie Perspectives?  [PDF]
Fang-Mei Tai, Po-Yao Chuang
iBusiness (IB) , 2014, DOI: 10.4236/ib.2014.64017
Abstract: In survey of marketing, there are important issues as “Is globalization changing cultures?”, “Are different cultures becoming more alike?”, and “If cultures are becoming more alike, how does this affect global marketing strategies?” One of the most popular cultural practices is movie-watching; Movies and/or TV dramas are greater information sources and part of popular culture. Culture is essential to success in marketing; it is important to explore if a culture is impacted by globalization through analyzing the perspectives of movie viewers [1]. The study is designed to investigate culture using the perspectives on a film randomly chosen from 1980s Taiwan early times. First of all, the method of the study is fundamentally described through Dunning and Hofstede’s theories and basic concepts of the qualitative methodologies as storytelling etc. [2]. Then, the study articulated and described the movie’s story, techniques, the similarities or differences between US and Taiwanese cinema, critic on the film and praised or suggested other films, at the same time, examined and analyzed if each perspective matched the dimensions of Hofstede’s Cultural theory. Finally, the analysis of the study both qualitative and quantitative provides with a significant indication of identifying the present culture in the measurement of movie perspectives, which have been the focus of mainstream strategy researchers, such as social, or reputational capital [3] and it comes into the conclusion that it is difficult and slow process for globalization changing cultures of Taiwan.
Test Method of Laser Detection Sensitivity Based on Every Pulse Measurement and Rearrangement  [PDF]
Hao Guo, Na Ma, Hongpeng Zhao, Mei Yao
Optics and Photonics Journal (OPJ) , 2017, DOI: 10.4236/opj.2017.78B006
Abstract:
It is very important to accurately measure the detection sensitivity of laser receiving equipment. Based on the traditional test method of detection probability curve, a new test method is proposed which works through measuring laser pulse one by one. Accurate measurement systems were constructed to improve the accuracy of laser energy measurement and energy regulation. A new data processing method of detection probability curve is put forward, which based on subsection statistics. The new data processing method in effect reduces the light source instability from 6.57% to 0.67%. These works improve the test accuracy of laser receiving detection sensitivity. It is a great support for the accurate evaluation of key technical indices of laser receiving equipment, which subsequently are done by models and simulation.
Measurements of Heat Treatment Effects on Bovine Cortical Bones by Nanoindentation and Compression Testing  [PDF]
Mei-ling Lau, Kin-tak Lau, Harry Ku, Debes Bahattacharyya, Yan-dong Yao
Journal of Biomaterials and Nanobiotechnology (JBNB) , 2012, DOI: 10.4236/jbnb.2012.31014
Abstract: Heat treatment of bone is one of the reliable and simple sterilization methods to overcome the risk of rejection and disease transfer from allograft and xenograft, in particular for the prevention of human immunodeficiency virus (HIV) infection. However, the mechanical property of the micro-structural level after heat treatment is not well characterized. To address this issue, this study was carried out to compare the localized mechanical properties of micro-structural tissue with those at the global structural level. Nanoindentation technique has been well accepted as an accurate technique to measure mechanical property of small and heterogeneous specimen nondestructively, as well as the complex bio-material of micro-structural level, often with a resolution of better than 1 μm. In this study, nanoindentation was conducted to measure the localised elastic modulus and hardness values of bones at temperature of 23°C (room temperature – non-heated sample), 90°C and 150°C, respectively. All experiments were conducted at room temperature (~23°C). The elastic modulus (E) and nanoindentation hardenss (H) values in the longitudinal direction of bones heated at 150°C were recorded as 23.43 GPa and 0.73 GPa, respectively; as in transverse direction, the E and H values were 12.77 GPa and 0.54 GPa, respectively. It showed significant increases of 44% and 43% in the longitudinal direction as compared to those of the non heat-treated bones. In addition, E and H values in transverse direction also showed increases of 23% and 38%, respectively as compared to those of the non heat-treated bones. Furthermore, heat-treated bones at 90°C in longitudinal direction also appeared to have significant increases of 18% and 31% in E and H values, respectively. However, the E and H values in transverse direction increase only by 0.4% and 12.8%, respectively. In addition, compressive test is employed to measure the global stiffness (E) of the bone samples. When heated at 150°C, the bone specimen showed an increase of 60% in stiffness (E) and an increase of 26% in yield stress. On the other hand, when heated at 90°C, a slight increase of 11.4% in stiffness (E) and 21.5% in yield stress were recorded respectively. Furthermore, energy dispersive X-ray spectroscopy (EDX) which integrated with Backscattered Electron (BSE) imaging was conducted to examine the relationship between mineral content and mechanical strength within the nanoindentation regions. The data demonstrated that the non heat-treated bones obtained the highest calcium wt% amongst the
A Study of the Habitation Arrangement of the Rural Elderly and The Quality of Their Life in The Yangtze River Delta
长江三角洲地区农村老年人居住方式与生活质量研究

YAO Yin,mei,
姚引妹

浙江大学学报(人文社会科学版) , 2002,
Abstract: This paper makes use of the data based on the sample survey of The Supporting Patterns of the Rural Elderly in the Yangtze River Delta in 2000. It takes the habitation arrangement of the elderly as the key issue and analyzes the quality of their life quantitatively and qualitatively. Some conclusions are drawn as follows: most of the aged people live together with their family members and are satisfied with their life as a whole. The selection of living arrangement of the aged is less affected by their age, gender, education, number of children, hobbies, but more related to their economic levels, health condition, loneness and so on.
Transmission Dynamics of a Two-City SIR Epidemic Model with Transport-Related Infections
Yao Chen,Mei Yan,Zhongyi Xiang
Journal of Applied Mathematics , 2014, DOI: 10.1155/2014/764278
Abstract: A two-city SIR epidemic model with transport-related infections is proposed. Some good analytical results are given for this model. If the basic reproduction number , there exists a disease-free equilibrium which is globally asymptotically stable. There exists an endemic equilibrium which is locally asymptotically stable if the basic reproduction number . We also show the permanence of this SIR model. In addition, sufficient conditions are established for global asymptotic stability of the endemic equilibrium. 1. Introduction Epidemiology is the study of the spread of disease in time and space, aiming at tracing factors that give rise to their occurrence. Since Kermark and Mckendrick in [1] built up a system to study epidemiology in 1927, the concept of “compartment modeling” is widely used until now. From then on, many great epidemic models are proposed and researched [2–5], which assume that population lives in the fixed region, without travel. However, in fact, people usually travel among different regions; thus models involving dispersal are indispensable. To control the spread of an infectious disease, we have to know how the growth and spread of the disease affect its outbreak. And there are many factors that lead to the dynamics of an infectious disease of humans, such as human behavior as population dislocations, living styles, sexual practices, and rising international travel. On the other hand, climate change enables diseases and vectors to expand their range. Since the first AIDS case was reported in the United States in June 1981, the number of cases and deaths among persons with AIDS increased rapidly during the 1980s followed by substantial declines in new cases and deaths in the late 1990s. In 2003, SARS began in Guangdong province of China; however, it broke out at last in almost all parts of China and some other cities in the world due to dispersal [6]. Recently, some epidemic models have been proposed to understand the spread dynamics of infectious disease. Ahmed et al. in [7] introduced a model with travel between populations. In addition, Sattenspiel and Herring considered the same type of model but applied it to travel between populations in the Canadian subarctic, which can be thought of as a closed population where travel is easily quantified [8]. Ding et al. [9] and Sattenspiel et al. [10, 11] have also discussed other models for the spread of a disease among two patches and patches. In [12], Wang and Mulone studied an SIS model with standard incidence rate on population dispersal among patches. Wang and Zhao [13] proposed an
Generator coordinate method for hypernuclear spectroscopy with a covariant density functional
H. Mei,K. Hagino,J. M. Yao
Physics , 2015,
Abstract: We apply the generator coordinate method (GCM) to single-$\Lambda$ hypernuclei in order to discuss the spectra of hypernuclear low-lying states. To this end, we use the same relativistic point-coupling energy functional both for the mean-field and the beyond-mean-field calculations. This relativistic GCM approach provides a unified description of low-lying states in ordinary nuclei and in hypernuclei, and is thus suitable for studying the $\Lambda$ impurity effect. We carry out an illustrative calculation for the low-lying spectrum of $^{21}_\Lambda$Ne, in which the interplay between the hypernuclear collective excitations and the single-particle excitations of the unpaired $\Lambda$ hyperon is taken into account in a full microscopic manner.
Unexpected carbon-oxygen bond cleavage of THF promoted by guanidinate titanium complex/lithium diisopropylamide: Synthesis and crystal structure
Yong Zhang,Mei Wang,Yingming Yao,Qi Shen
Chinese Science Bulletin , 2005, DOI: 10.1360/982005-487
Abstract: An unexpected carbon-oxygen bond cleavage of THF (THF = tetrahydrofuran) promoted by guanidinate titanium complex was described. Guanidinate lithium [Pr2 iNC(NCy)2]Li (Cy = cyclohexyl) formed in situ reacted with TiCl4(THF)2 in a 2:1 molar ratio to produce the guanidinate titanium chloride [Pr2 iNC(NCy)2]2TiCl2 (1) in good yield. The reaction of [Pr2 iNC(NCy)2]2TiCl2 with lithium diisopropylamide in THF afforded an unexpected [Pr2 iNC(NCy)2]2Ti(OBun)2 (2), which was formed by the cleavage of carbon-oxygen bond of THE Complexes 1 and 2 were fully characterized by elemental analysis, NMR and IR spectroscopies, and X-ray crystal structure determination for complex 2.
Long-Time Dynamic Response and Stochastic Resonance of Subdiffusive Overdamped Bistable Fractional Fokker--Planck Systems

KANG Yan-Mei,JIANG Yao-Lin,

中国物理快报 , 2008,
Abstract: To explore the influence of anomalous diffusion on stochastic resonance (SR) more deeply and effectively, the method of moments is extended to subdiffusive overdamped bistable fractional Fokker--Planck systems for calculating the long-time linear dynamic response. It is found that the method of moments attains high accuracy with the truncation order N=10, and in normal diffusion such obtained spectral amplification factor (SAF) of the first-order harmonic is also confirmed by stochastic simulation. Observing the SAF of the odd-order harmonics we find some interesting results, i.e. for smaller driving frequency the decrease of subdiffusion exponent inhibits the stochastic resonance (SR), while for larger driving frequency the decrease of subdiffusion exponent enhances the second SR peak, but the first one vanishes and a double SR is induced in the third-order harmonic at the same time. These observations suggest that the anomalous diffusion has important influence on the bistable dynamics.
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