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We consider a power allocation problem for three-node cooperative diversity systems using a relay node. Specifically, we focus on an amplify-and-forward (AF) protocol due to the simple operation at the relay node which makes the mathematical analysis tractable. This protocol consists of two phases. The source transmits the signal to both relay and destination in the first phase. In the second phase,...
Based on the analysis of the characteristics of the supply chain system of complex products in cluster, this paper proposes to study the collaboration of supply chain system in cluster with the simulation technology. Under the condition of keeping the higher level of quick response, the key influence factors to the collaboration of supply chain system are found through the analysis of run results...
The rapid development of online social networks has attracted much attention all over the world. Communications through online communities are becoming prevalent among people of all ages. Though online social networks provide us a platform to share opinions publicly, this mechanism will also lead to the generation of rumors especially in case of emergency. So it is urgent for researchers to figure...
Describing social positions and roles is an important topic within social network analysis. One approach is to compute a suitable equivalence relation on the nodes of the target network. One relation that is often used for this purpose is regular equivalence, or bisimulation, as it is known within the field of computer science. In this paper we consider a relation from computer science called simulation...
We have already proposed a simulation model for a 90-deg-tilted MEMS mirror, but in some reasons, numerical simulation methods for several angle counter electrode devices are not established. In order to solve these problems, we propose a cascade drive voltage signal technique and demonstrate a 51.5 deg tilted angle counter electrode and assure the effectiveness of the equivalence circuit.
Ethyl acetate (EtAc) is mainly used as solvent in paints and coatings industry, inks production and as industrial solvent in many other branches of industry. Esterification of acetic acid with ethanol may be performed to synthesize ethyl acetate. In this paper, a reactive distillation (RD) column with packing cation exchange resins as a catalyst is applied. Mathematical models of reactive distillation...
The progress of distributed interaction simulation is restricted by the traditional Basic Simulation Computing Resource (BSCR). It is difficult to speedily customize BSCR on demand. Aiming at this question, a BSCR management platform is proposed based on the virtualization technology. Upon the platform, users could apply for a Virtual Machine (VM) as BSCR to execute simulation application. B/S architecture...
Porosity is quite significant for the characterization and prediction of transport properties. To simulate the porosity values, a porosity simulation method using Markov model based on cokriging is proposed to simulate the continuous values of porosity. Although cokriging is an unbiased prediction method with minimum prediction variance, original cokriging cannot solve the problem of instability in...
Electrostatic rotary-bell sprayer is widely used for coating conductive substrates. The combination of a high-velocity focusing air, an imposed electric field and charged droplets, leads to higher transfer efficiency than that of conventional spray coating. In this paper, the numerical simulation of the gas flow field of an electrostatic rotated bell sprayer has been obtained by solving the time averaged...
Scratchpad memory (SPM) is commonly used in embedded system because it is more efficient than cache in both performance and energy, and it can satisfy real time requirements as well. A compiler driven method is proposed in this paper to optimally mapping code segments to SPM at runtime. The algorithm uses compiler to identify hotspots in programs based on a greedy cost model, and utilizes DMA transfer...
According to the defects of the XCTD (Expendable Conductivity, Temperature, and Depth) Profiler low data transmission rate and reliability, a modem underwater data transmission system is introduced. The absolute phase-shift demodulated signal of the phase ambiguity problem is overcome by π/4-QDPSK, which is a linear narrow-band digital modulation technique and has high bandwidth efficiency, low bit...
This paper addressed the dynamics and control for completely spatial 6-DOF parallel robots (SPR) in computer. The complex dynamic equations are derived via using Kane methods, and a typical PID controller is developed for spatial 6-DOF parallel robots. Making use of the software of Simulink, the computer model of SPR is built in terms of the dynamic equations of SPR, and the simulation is realized...
Due to the combination of discrete events and continuous behavior the validation of hybrid systems is a challenging task. Nevertheless, as for other systems the correctness of such hybrid systems is a major concern. In this paper we present a new approach for verifying the input-output conformance of two hybrid systems. This approach can be used to generate mutation-based test cases. We specify a...
Fiber-optic dispersion and its effect on optical transmission system are analyzed. The most commonly used dispersion compensation fiber (DCF) technology is studied in this article. Three schemes (pre-compensation, post-compensation, mix-compensation of dispersion compensation) of dispersion compensation with DCF are proposed. The simulation model of the WDM based on the Optisystem is presented according...
Traditional choice models such as the Logit model have suffered practical difficulties in reality. Simulation is an efficient way to solve most of choice problems for it can help make decisions at quite a high speed without loss of accuracy. This paper focuses on the simulation of passengers' choice behaviors within a railway network. Short introductions to a railway passenger's choice behavior and...
The optimal parameters of gated nanowire field emitters for field emission display application were studied. The device parameters such as geometric parameters of the nanowire, distance between gate electrode and cathode, the cathode to anode distance were simulated. It is found the nanowire height has an optimal value due to the combined effects of geometric field enhancement and gate induced electric...
A simplified simulation approach has been introduced for gated field emitters. F-N equation fitted with experimental field emission characteristic is used to calculate the characteristics of a double-gated field emitters. By assuming the cathode is a flat thin film, the anode current and gate current are simulated. The validity of the simulation is evaluated by experimental results.
Using the harmonic characteristics of output voltage of inverter to design an ameliorative filter which can suppress common-mode and differential-mode voltage at the same time. The simulation is done by MATLAB and the results of the simulation show that long cables are allowed to connect inverter and motor for the filter. By altering the parameters of the filter, the overvoltage in the motor can be...
Transmit beamforming is a powerful strategy to suppress multiple-access interference (MAI) and increase the system capacity if the downlink channel is known precisely. However, it is indeed very difficult to get the exact channel information in realistic scenarios. In this paper, we present a zero interference transmit beamforming (ZIBF) scheme which only uses the statistical information of the downlink...
With the increment of traffic flow, the delay of flights in the TMA area is increased. It is essential that the potential usage of TMA airspace should be excavated. In this paper, SIMMOD PLUS is used for the evaluation of airspace structure of Chongqing TMA, taking Chongqing airport influence and its flow control strategy into consideration. Furthermore, the bottleneck which limits the operation of...
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