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Search Results: 1 - 10 of 226 matches for " Junwei "
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Research on the Interference Trend of National Taxation with Price and Inflation  [PDF]
Shufeng Wang, Junwei Han
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.63011
In view of the objective reality that the market prices stay high in recent years, inflation which continues to rise is not effectively inhibited, combined with the previous economic circles who attributed the reasons to inflation for commodity supply and demand, the issuance of money and neglect the role of tax factors led to national governance inflation decision-making that is limited by the phenomenon. By means of comparative analysis, Granger causality analysis and Augmented Dickey-Fuller test, we dissect the external disturbance and endogenous factors of influencing inflation, select the 2001-2016 tax index and CPI index and make an empirical research of the interference from government taxation to price and inflation trends and strength. It is approved there is single causal relationship between tax and price rising, and sums up that government taxation can promote inflation, but inflation can’t lead to tax rising. Of course, this conclusion can also provide theoretical support for national governance of inflation.
A Self-Consistent Model on Cylindrical Monopole Plasma Antenna Excited by Surface Wave Based on the Maxwell-Boltzmann Equation  [PDF]
Junwei Lv, Yingsong Li, Zili Chen
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2011, DOI: 10.4236/jemaa.2011.38048
Abstract: The paper analyzes the motion of electron in plasma antenna and the distribution of electromagnetic field power around the plasma antenna, and proposes a self-consistent model according to the structure of cylindrical monopole plasma antenna excited by surface wave; calculation of the model is based on Maxwell-Boltzmann equation and gas molecular dynamics theory. The calculation results show that this method can reflect the relationships between the external excitation power, gas pressure, discharge current and the characteristic of plasma. It is an accurate method to predicate and calculate the parameters of plasma antenna.
Lift System Design of Tail-Sitter Unmanned Aerial Vehicle  [PDF]
Dizhou Zhang, Zili Chen, Junwei Lv
Intelligent Control and Automation (ICA) , 2012, DOI: 10.4236/ica.2012.34033
Abstract: The main advantage of tail-sitter unmanned aerial vehicle (UAV) are introduced. Three design solutions of rotor tail-sitter lift system of UAV have been presented and the respective control strategies and characteristics of three solutions are also analyzed in the paper, through the related experiments the design of twin-rotor lift system is verified, and its feasibility is proved. The characteristics and the applying background of the twin-rotor tail-sitter UAV are described in detail. Some useful conclusions of the lift system for tail-sitter UAV are obtained.
Communication Buses and Protocols for Sensor Networks
Junwei Zhou,Andrew Mason
Sensors , 2002, DOI: 10.3390/s20700244
Abstract: This paper overviews existing digital communication buses which are commonly used in sensor networks, discusses sensor network architectures, and introduces a new sensor bus for low power microsystem applications. The new intra-module multi-element microsystem (IM2) bus is nine-line interface with 8b serial data which implements several advanced features such as power management and plug-n-play while maintaining minimum hardware overhead at the sensor node. Finally, some issues in wireless sensor networking are discussed. The coverage of these issues provides a guideline for choosing the appropriate bus for different sensor network applications.
Composition of piecewise pseudo almost periodic functions and applications to abstract impulsive differential equations
Junwei Liu and Chuanyi Zhang
Advances in Difference Equations , 2013, DOI: 10.1186/1687-1847-2013-11
Abstract: In this paper, we introduce the concept of piecewise pseudo almost periodic functions on a Banach space and establish some composition theorems of piecewise pseudo almost periodic functions. We apply these composition theorems to investigate the existence of piecewise pseudo almost periodic (mild) solutions to abstract impulsive differential equations. In addition, the stability of piecewise pseudo almost periodic solutions is considered.
Hα redshift velocity field before flare onset
Junwei Zhao,Cheng Fang
Chinese Science Bulletin , 1997, DOI: 10.1007/BF02882494
Outer Synchronization between Fractional-Order Complex Networks: A Non-Fragile Observer-based Control Scheme
Meichun Zhao,Junwei Wang
Entropy , 2013, DOI: 10.3390/e15041357
Abstract: This paper addresses the global outer synchronization problem between two fractional-order complex networks coupled in a drive-response configuration. In particular, for a given fractional-order complex network composed of Lur’e systems, an observer-type response network with non-fragile output feedback controllers is constructed. Both additive and multiplicative uncertainties that perturb the control gain matrices are considered. Then, using the stability theory of fractional-order systems and eigenvalue distribution of the Kronecker sum of matrices, we establish some sufficient conditions for global outer synchronization. Interestingly, the developed results are cast in the format of linear matrix inequalities (LMIs), which can be efficiently solved via the MATLAB LMI Control Toolbox. Finally, numerical simulations on fractional-order networks with nearest-neighbor and small-world topologies are given to support the theoretical analysis.
Achievable Rates and Resource Allocation Strategies for Imperfectly Known Fading Relay Channels
Zhang Junwei,Gursoy MustafaCenk
EURASIP Journal on Wireless Communications and Networking , 2009,
Abstract: Achievable rates and resource allocation strategies for imperfectly known fading relay channels are studied. It is assumed that communication starts with the network training phase in which the receivers estimate the fading coefficients. Achievable rate expressions for amplify-and-forward and decode-and-forward relaying schemes with different degrees of cooperation are obtained. We identify efficient strategies in three resource allocation problems: (1) power allocation between data and training symbols, (2) time/bandwidth allocation to the relay, and (3) power allocation between the source and relay in the presence of total power constraints. It is noted that unless the source-relay channel quality is high, cooperation is not beneficial and noncooperative direct transmission should be preferred at high signal-to-noise ratio (SNR) values when amplify-and-forward or decode-and-forward with repetition coding is employed as the cooperation strategy. On the other hand, relaying is shown to generally improve the performance at low SNRs. Additionally, transmission schemes in which the relay and source transmit in nonoverlapping intervals are seen to perform better in the low-SNR regime. Finally, it is noted that care should be exercised when operating at very low SNR levels, as energy efficiency significantly degrades below a certain SNR threshold value.
Research of Distribution of Temperature Field in Process of Shaping
Xianzhang Feng,Junwei Cheng
Journal of Software , 2011, DOI: 10.4304/jsw.6.1.72-77
Abstract: The cutting is an important machining technology, in which is belong to nonlinear large deformation, involving material nonlinear, geometry nonlinear and original bug, the thermal energy coupling question, and the nonlinear boundary condition, and so on. For the processing of metal cutting, using the large-scale commercial finite element theory, the coupling finite element model is established the consideration metal orthogonal cutting thermal energy based on the hot elastoplasticity finite element method. And analyzing the scrap processing simulation and so on swarf separation criterion, auto-adapted grid key aspects. Depending on the established finite element the model, it obtained the distribution laws of the temperature field and displacement field. The study results can give a theoretical basis for selecting the cutting tool shape, preferable surface. The research will develop the new cutting tool material, in same time r
The magnetospheric activity of bare strange quark stars
Junwei Yu,Renxin Xu
Physics , 2010, DOI: 10.1111/j.1365-2966.2011.18409.x
Abstract: In Ruderman & Sutherland (RS75) model, the normal neutron stars as pulsars bear a severe problem, namely the binding energy problem that both ions (e.g., ${}_{26}^{56}$Fe) and electrons on normal neutron star surface can be pulled out freely by the unipolar generator induced electric field so that sparking on polar cap can hardly occur. {\bf This problem could be solved within the Partially Screened Gap (PSG) model in the regime of neutron stars}. However, in this paper we extensively study this problem in a bare strange quark star (BSS) model. We find that the huge potential barrier built by the electric field in the vacuum gap above polar cap could usually prevent electrons from streaming into the magnetosphere unless the electric potential of a pulsar is sufficiently lower than that at infinite interstellar medium. Other processes, such as the diffusion and thermionic emission of electrons have also been included here. Our conclusions are as follows: both positive and negative particles on a BSS's surface would be bound strongly enough to form a vacuum gap above its polar cap as long as the BSS is not charged (or not highly negative charged), and multi-accelerators could occur in a BSS's magnetosphere. Our results would be helpful to distinguish normal neutron stars and bare quark stars through pulsar's magnetospheric activities.
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