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In this letter, an atomistic-level simulation model of bipolar TiO2 RRAM is addressed, which adopts the typical MIM structure and combines the equation of oxygen vacancy transport, current continuity and Joule heating. Based on the model, the dynamic formation and rupture of conductive filament are described in a 3D geometry model of COMSOL. Besides, the electro-thermal model with a conical shape...
Retail chains in China have been booming in the past 5 years, particularly for small 100 ft2 stores. This study focus on evaluating the location of small chain stores, including 5 major concerns regarding site selection: (a) stream of people, (b) group of stores, (c) location characteristics, (d) store space, and (e) rent proportional to sales. We divided these categories into 9 major factors for...
A dynamical model with multi perturbation factors of unwinding tension was established by analyzing the web press experiment platform. A tension control simulation system was constructed whose actuator is a magnetic powder brake by using MATLAB. A fuzzy adaptive PID controller was designed, and compared with the traditional PID control through experiment. The results show that the fuzzy adaptive PID...
As low-power electronics and miniaturization conspire to populate the world with emerging devices, one appealing approach is to power these multi-core/many-core-based devices with energy harvested from various environments. Of the most important issues concerning these devices is how to effectively allocate power budget among the cores competing for power, which is formulated as one specific type...
Based on analyzing the shaftless multiple unit web press experiment platform, a precise color-alignment mathematical model was established in order to characterize register system and control it. A register control simulation system was constructed in MATLAB which actuator was a permanent magnet synchronous motor. Considering the nonlinear of servo motor, a sliding mode variable structure controller...
This paper presents a new time-frequency (TF) underdetermined blind source separation approach based on Wigner-Ville distribution (WVD) and Khatri-Rao product to separate non-stationary sources from mixtures. First, an improved method is proposed for estimating the mixing matrix, where the negative value of the auto WVD of the sources is fully considered. Then after extracting all the auto-term...
In many automation equipment production process, it is essential to ensure constant tension of the material, to ensure product quality and production efficiency. In order to make the feeding process of this chip mounter stable, and ensure the accurate measurements, we use the principle of automotive brake to improve the tension institutions, and design cam - rotating drum constant tension control...
In Statistical Process Control (SPC), when dealing with a quality characteristic x that is a variable, it is usually necessary to monitor both the mean value and variability. By inspecting the absolute value of sample mean shift, a single CUSUM chart (called the ABS CUSUM chart) has been devised by an optimization algorithm and fully investigated for this purpose. The optimization algorithm (called...
This article studies the sample sizes of two most commonly used control charts, the X?? chart and the CUSUM chart. It takes the sampling cost (including the variable and fixed components) into consideration and uses a quadratic loss function as a performance measure. It is interesting to find that if nX?? = 4 and nCUSUM = 1, the X?? chart often outperforms the CUSUM chart. Furthermore, the overall...
By combining the subjective and objective weights with the optimization technique, we construct an optimal model to make the deviation among the aggregated evaluation values as large as possible. Then the final weights of indices, which reflect the subjective and objective information, can be obtained. This approach is propitious to order schemes and select the best one.
To forecast the thermal response of LPG ( liquefied petroleum gas ) storage tank under the conditions of a non-normal thermal environment is of great practical significance to the evaluation of gas storage and transportation security, especially on disastrous accident prediction. This paper is based on the relationship between conservation of mass and energy conservation to describe the physical model...
The article take the computer as the auxiliary means, the use linear plan theory to the large-scale petroleum chemical industry combination unit system establishment mathematical simulation model, simulates the entire wrap petroleum chemical industry installment the investment, delivers, describes between each response mathematical logic relations and the inner link, and causes the model reflection...
Spatialized population data is much closer to actual circumstances than population distribution represented in administrative units. It is also crucial for analyzing the relationship among economic growth, environment protection, resource utilization, and other interdisciplinary study. Remote Sensing (RS) and Geographic Information System (GIS) are both effective research tools of spatializing census...
Focusing on discount promotion in retailer and stochastic customer demand with price-sensitive, the paper brings forward coordinated replenishment and pricing model that simultaneously determines market price and order quantity. The aim is to maximize expected profit in selling period. The model is proved that it is concave function on price and order quantity and its optimal solution is found out...
Focusing on customer's purchase character of pursuing low price and high quality, the paper considers stochastic demand dependent on price and quality and brings forward joint replenishment and pricing decision model whose endogenous decision variable is market price and order quantity. The model is proved that it is concave function on price and quantity and its optimal solution is found out. The...
Composable modeling enables the rapid, efficient and flexible assembly of simulation systems from components. To data there is a lack of formal descriptions for the process of composable modeling or composable modeling approaches are not operable in engineering. In view of the existing problems, a composable modeling approach based on Petri nets was proposed. Petri nets formal definition of component...
This article proposed an algorithm for the optimization design of the combined Shewhart chart and CUSUM chart ( Xmacr& CUSUM chart) that has been widely used in Statistical Process Control (SPC). The optimization design effectively improves the overall performance over the entire process shift range. A new feature pertaining to the exponential of the sample mean shift w is investigated to further...
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