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Automated valuation model (AVM) is a mathematical program to estimate the market value of real estates based on the analysis of locations, neighborhood characteristics, and relevant property characteristics. The most common AVMs em-ployed by the appraisal industry are based on multiple regression analysis. Other analytic tools such as statistical learning and fuzzy algorithms have become more popular...
In this paper, a three-phase 12/8 switched reluctance generator is taken as the study object and a control system based on that generator is designed. In that system, the digital signal controller applied for is dsPIC30F6010, and power converter circuit adopt asymmetric half-bridge topology, and the main switches use power MOSFET. The paper analyzes the process of power generation and the basic structure...
The features of Coriolis mass flow sensor output signal are analyzed, and a mathematical model of the time difference for the signals is built to evaluate the rationality and limitation of the proposed correction method when Coriolis mass flowmeter (CMF) is used to measure the gas-liquid two-phase flow. According to the experimental data of Coriolis mass flow sensor output signals under the gas-liquid...
Simulation technology is widely used in the engineering process of manufacturing plants, which promises the benefits such as debugging the programs of Programmable Logic Controller (PLC) in the early design phase, validating the co-working of the associated machines and accelerating the commissioning time. Although many researches have been made on this topic in recent years, the high cost of simulation...
Network coding and opportunistic routing as transmission technologies of Wireless Mesh Network, which are based on the 802.11 broadcast channel access, have become more sophisticated. It is important to build more accurate models on broadcast channel access to analyze performance, such as throughput, delay, fairness and contention. This paper describes behavior of network nodes based on MAC layer...
Remaining useful life (RUL) estimation by monitoring in-situ health of components and systems permits decision-makings in the condition based maintenance policy relying on actual operational states. In this paper, we consider systems subject to competing failures, and determine the remaining useful life distribution at the end of monitoring time. Soft failures consider both the degradation and damage...
An uniplanar capacitance sensor is a core device of high-precision instrument applied to measure wood moisture content, permittivity, etc. In nature, it is a special case of a capacitance sensor of unspecific form. This paper describes the numerical solution to a mathematical model of uniplanar capacitance sensor. An uniplanar capacitance sensor with specific size was taken as an example in this study,...
A new analysis method of reliability test data about low-voltage electrical appliance is proposed based on grey theory, which can be applied to solve small sample size problem. The conception, that is called ??gray stability??, is first proposed and defined notion and derivation of mathematical expression. It has important engineering significance in the field of reliability. The test data about electrical...
Traditional educational systems are usually presented in a course based and static way, without taking into account the learner's interests and learning progress. Language learning by that means could be accompanied by boredom and lack of real experiences, which is a great barrier to improving language skills. This paper presents an English learning system that is based on Web browsing. Users browse...
This paper presents an expert body sensor network (BSN) algorithm for autonomous control of mean arterial blood pressure using vasoactive drugs. A robust Proportional Integral Differential (PID) control algorithm based on a statistics model was designated. Extensive simulation results indicated that the light-weighted expert BSN system is robust enough against sensitivity variations and various artificial...
With rapid development of communication technology, the signal integrity is impacting the system performance much more than before. So either in the IC design or in the system design, it is very important to investigate negative timing analysis and its mathematical modeling in the high speed integrated circuit. In the paper, we introduce the origin of the negative timing script in the deep sub-micrometer...
Slide mode variable structure control method is used for designing a digital controller of BLDC electric actuator in this paper. Firstly, the mathematic model of electric actuator is built according to the selected BLDC motor. Secondly, two slide mode algorithms, proportion switching algorithm and velocity trending law algorithm, are designed for the electric actuation system. Thirdly, we design a...
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