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OALib Journal期刊

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Simulation Design of Variable Frequency Speed Regulating System for Automobile Remanufactured Generator Test Bench Based on Matlab  [PDF]
Huilong Lv, Yiping Luo
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104628
Abstract:
There are many types of vehicle generators and their parameters are different. Therefore, the motor selected for the remanufacturing test bench should be suitable for most generators. Therefore, there is a certain requirement for the adjustment range of the motor speed. The AC-DC-AC frequency converter has a large frequency adjustment range, which can meet the motor speed control requirements. In this paper, the Simulink visual simulation tool Simulink modeling and simulation of AC-DC-AC inverter circuit, according to re-manufactured generator test to change the motor-related parameters, and the resulting waveform analysis.
The Research of Magneto-Rheological Fluid Yield Stress Model  [PDF]
Meng Ji, Yiping Luo
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104643
Abstract:
Magnetorheological Fluid (MRF), as an advanced and smart material which was controlled by magnetic field, was a kind of stable suspension in which magnetic particle dissolved in base fluid. The yield stress, one of main performance parameters of MRF, was the demarcation point between liquid and solid. At present, the yield stress calculation model did not have a uniform standard. The research on yield stress model was significant to the research on MRF. First, the research was based on the MRF characteristic and the research status of MRF sheer yield stress; second the classic dipole model, local field dipole model, polarized pellet model, continuous models on the average had been calculated and compared. The classic dipole model and local field dipole model had a well ability to describe the yield stress of MRF.
Comparison of the body proximate compositions of juvenile bronze gudgeon (Coreius heterodon) and largemouth bronze gudgeon (C. guichenoti) in the upstream region of the Yangtze River
Yiping Luo, Qingda Huang, Yurong Zhang, Shuting Liu and Wen Wang
SpringerPlus , 2013, DOI: 10.1186/2193-1801-2-75
Abstract: The body proximate compositions were assessed in juvenile Coreius heterodon and C. guichenoti from the upstream of the Yangtze River. The migratory C. guichenoti has a higher lipid content (FAT) than the residential C. heterodon. FAT of C. guichenoti showed an interesting pattern of increase, where FAT increased up rapidly and then leveled off as body mass (M) increased above 6.5 g, suggesting that the lipid concentration reaches an upper limit of deposition. In both species, FAT of the smaller individuals was lower than protein content (PRO), but FAT increased more rapidly than PRO as the fish grew. This indicates that more energy was allocated to protein synthesis than lipid in the smaller fish, with an energy allocation shift from protein synthesis to lipid storage as the fish grew. Strong relationships between both FAT and energy content (E) and water content (WAT) were found in both species, suggesting strong predictive power for future application. However, different models for the two species should be used to predict FAT or E by WAT.
Periodicsolution and global exponential stability of Hopfield neural networks with time-varying delayed
变时滞Hopfield神经网络的周期解存在性及其全局指数稳定性

Luo Yiping,Deng Feiqi,Xia Wenhua,
罗毅平

系统科学与数学 , 2006,
Abstract: By employing the continuous theorem from topology and the extended Ha-lanay's inequality, the existence and global exponential stability of periodic solutions for the Hopfield neural network with time-varying delayed are investigated. The algebraic sufficient conditions of periodicity and global exponential stability are presented. The conditions can be examined easily, so it is of practical usage. In additions, earlier results are extended and improved. A computation example is given to illustrate the proposed method.
Research on Consumer Purchase Behavior Diffusion across Market Using Cellular Automata
Fang Ma,Gangling Chao,Lihua Chen,Yiping Luo
International Journal of Marketing Studies , 2012, DOI: 10.5539/ijms.v4n5p108
Abstract: The goal of this article is to offer new theoretical propositions to advance consumer behavior diffusion research and to provide a cellular automata method for diffusion modeling. We construct a cellular automata model (CAD) that captures the consumer learning mechanism in the purchase behavior diffusion which result in the new product diffusion. The results show that the cellular automata model successfully examined the purchase behavior diffusion on different products both in China and America to compare consumer behavior in different segmentation market for implication on new product marketing.
A Theory on Fashion Consumption
Fang Ma,Huijing Shi,Lihua Chen,Yiping Luo
Journal of Management and Strategy , 2012, DOI: 10.5430/jms.v3n4p84
Abstract: Both the theory of top-down penetration of fashion consumption (Veblen - Simmel model) and the theory of bottom-up fashion consumption have been found consistent with the consumer behavior in the China’s fashion consumer market and the trend of such behavior keeps growing. Therefore, it is necessary to carry out a study on fashion consumption to meet the needs of the development of real life and fashion consumption. Firstly, we describe the content of fashion consumption, discuss the connotation and main features of fashion and analyze the relationship among fashion, innovation, classic and prevalence; namely, innovation is the pioneer of fashion while the classic is the denotation of faded fashion and prevalence is the continuance of fashion. Secondly, we examine the psychological motivations and behavioral mechanisms of fashion consumption, pointing out that the psychological motivations of fashion consumption is showing-off and it is of symbolic significance. The general characteristics of fashion buyers and consumer characteristics including the elegant fashion, the popular fashion, the cool fashion and the Bobos fashion are presented. We put forward a decision-making process in fashion consumption according to the influence of fashion, the extent of consumer involvement and the purchase decision time. Finally, by analyzing the fashion consumption behavior of the Chinese consumers, we point out that the core of the cool fashion or the Bobo fashion is actually not materialism and both cool fashion and Bobo fashion will have a profound influence in the fashion consumption in the future.
Intraspecific Scaling of the Resting and Maximum Metabolic Rates of the Crucian Carp (Carassius auratus)
Qingda Huang, Yurong Zhang, Shuting Liu, Wen Wang, Yiping Luo
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0082837
Abstract: The question of how the scaling of metabolic rate with body mass (M) is achieved in animals is unresolved. Here, we tested the cell metabolism hypothesis and the organ size hypothesis by assessing the mass scaling of the resting metabolic rate (RMR), maximum metabolic rate (MMR), erythrocyte size, and the masses of metabolically active organs in the crucian carp (Carassius auratus). The M of the crucian carp ranged from 4.5 to 323.9 g, representing an approximately 72-fold difference. The RMR and MMR increased with M according to the allometric equations RMR = 0.212M0.776 and MMR = 0.753M0.785. The scaling exponents for RMR (br) and MMR (bm) obtained in crucian carp were close to each other. Thus, the factorial aerobic scope remained almost constant with increasing M. Although erythrocyte size was negatively correlated with both mass-specific RMR and absolute RMR adjusted to M, it and all other hematological parameters showed no significant relationship with M. These data demonstrate that the cell metabolism hypothesis does not describe metabolic scaling in the crucian carp, suggesting that erythrocyte size may not represent the general size of other cell types in this fish and the metabolic activity of cells may decrease as fish grows. The mass scaling exponents of active organs was lower than 1 while that of inactive organs was greater than 1, which suggests that the mass scaling of the RMR can be partly due to variance in the proportion of active/inactive organs in crucian carp. Furthermore, our results provide additional evidence supporting the correlation between locomotor capacity and metabolic scaling.
Topology Optimization Design of Automotive Engine Bracket  [PDF]
Po Wu, Qihua Ma, Yiping Luo, Chao Tao
Energy and Power Engineering (EPE) , 2016, DOI: 10.4236/epe.2016.84021
Abstract: According to the structural characteristics of the automobile engine bracket, the finite element model of the bracket is established. As the connecting part between the engine and the body, the performance requirements of the automobile engine bracket affect the comfort and the safety of the vehicle directly. Using the RADIOSS solver, the dangerous point of the bracket is analyzed. Under the premise of ensuring its reliability, with the help of OptiStruct software to carry out the topology optimization design, to get the optimal material distribution of the bracket and the final design will meet the performance requirements.
Effect of Surfactant HLB Value on Settlement Stability of Magnetorheological Fluid  [PDF]
Yanwen Jiang, Yiping Luo, Hongjuan Ren, Dan Wei
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1105004
Abstract:
The hydrophilic-hydrophobic balance (HLB) of surfactants has a great influ-ence on surfactants. Among them, polyethylene glycol has an HLB value of 20 and is highly hydrophilic; oleic acid has an HLB value of 1, which is very lipophilic; and sodium dodecylbenzenesulfonate has an HLB value of 10.6 be-tween the two. This paper explores the use of these three surfactants with typi-cal HLB values to improve the performance of magnetorheological fluids, mainly to study its effect on the stability of magnetorheological fluids. Tests have shown that the use of lipophilic surfactants in oil-based magnetorheologi-cal fluids has better sedimentation stability than the use of hydrophilic surfac-tants.
Hierarchical Modeling by Recursive Unsupervised Spectral Clustering and Network Extended Importance Measures to Analyze the Reliability Characteristics of Complex Network Systems  [PDF]
Yiping Fang, Enrico Zio
American Journal of Operations Research (AJOR) , 2013, DOI: 10.4236/ajor.2013.31A010
Abstract:

The complexity of large-scale network systems made of a large number of nonlinearly interconnected components is a restrictive facet for their modeling and analysis. In this paper, we propose a framework of hierarchical modeling of a complex network system, based on a recursive unsupervised spectral clustering method. The hierarchical model serves the purpose of facilitating the management of complexity in the analysis of real-world critical infrastructures. We exemplify this by referring to the reliability analysis of the 380 kV Italian Power Transmission Network (IPTN). In this work of analysis, the classical component Importance Measures (IMs) of reliability theory have been extended to render them compatible and applicable to a complex distributed network system. By utilizing these extended IMs, the reliability properties of the IPTN system can be evaluated in the framework of the hierarchical system model, with the aim of providing risk managers with information on the risk/safety significance of system structures and components.

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