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In this article, a new methodology is presented for identification of finite-impulse-response (FIR) models. The central idea is to use a series of stable models of first-order plus time delays (FOPTD) to approximate the dynamics of the process. A quantitative analysis of the modelling error is provided. Compared to the existing basis model approaches, the advantages of the proposed method lie in the...
The equilibrium glide-based predictor-corrector reentry guidance algorithm has received increasing attention due to its good adaptiveness. However the big disturbance or insufficient accuracy of prediction could lead to large correcting bias, causing departure from equilibrium glide state and phugoid oscillation of reentry trajectory, which could induce large thermal and dynamic loads and are detrimental...
An analytical study of designing power stage for the emerging digital LDO is presented in this paper. Two widely adopted sizing options are discussed, namely binary and multiple-unary weighted power stage sizing. Both methods target at realizing a balanced speed and resolution of the digital LDO. The binary sizing benefits the large current step, however, in average, may render a more oscillating...
With the aggressive scaling of integrated circuit technology, analog performance modeling is facing enormous challenges due to high-dimensional variation space and expensive transistor-level simulation. In this paper, we propose a kernel density based sparse regression algorithm (KDSR) to accurately fit analog performance models where the modeling error is not simply Gaussian due to strong nonlinearity...
Magnetic forces in large submersible tubular motors are generally caused by the strong magnetic fields in the air gap. Due to the large size of the machine, and the rather thin stator, the magnetic forces acting on the stator often make the stator deform in many practical projects. In order to figure out the deformation degree of the stator caused by the magnetic forces, this paper proposes a simplified...
The decision maker's preference information is an important part in the process of conflict analysis. Under the influence of uncertainty factors existing in the actual conflict, the decision maker's preference ranking is not completely certain. Because the shortage that the existing uncertain preference ordering method is too rough, this paper examines a new measure of preference ranking based on...
Digital Library large data resource lack of analysis and use, in order to mining the value of big data resources, proposed platformization analysis and processing mode. By integrate R and Hadoop to construct distributed data analysis platform, many big data analytical can be decomposed into "large" and "small" data processing section, overcome before scheme puzzle on analytical...
Chemical process industries often suffer from abnormal events of varying magnitudes, which may lead to different consequences, including incipient faults, near-miss, incidents, and accidents. Typically, when an abnormal event occurs, various safety systems, such as alarm systems and safety instrumented systems (SIS), come into play to prevent the event from propagating. To improve process safety,...
Existing commercial power sign-off tools analyze the functional mode of operation for a small time window. The detailed analysis used makes such tools impractical in determining test peak power where a large amount of scan shift cycles have to be analyzed. This paper proposes an approximate test peak power analysis flow capable of computing test peak power at each power bump in the design. The flow...
Considering the characteristics of multi-attribute decision making in analysis and detection of rolling bearing quality grades, a new model is built based on entropy theory and extension classification algorithm for analysis of rolling bearing quality grades. The qualitative description of matter element model is built with the training dataset using extension theory, and the objective weight coefficient...
MONGOLICA forests is composed of HONGHUA-ERJI one of the main vegetation, MONGOLICA in the region after long-term impact of natural succession and human activities, pine forests in the formation of a unique, extremely valuable research and ecological value. MONGOLICA forests in the region has been listed as a national nature reserve and seed base. Applications in remote sensing, vegetation indices...
With the rapidly increasing demand for high-speed computing, multi-core/many-core processors emerge as the future development direction in the industry. However, most applications cannot match with the present multi-core platform, which makes the optimization research of multi-core platform very necessary. The optimization varies with applications and platforms; therefore we need to exploit the optimization...
Automatic detection of image damaged regions is the key to automatic video image inpainting. Vertical scratches are the common damages in the old film. In this paper, a vertical scratches detection algorithm based on edge detection is proposed. The proposed algorithm first uses the operator which has the largest response to the vertical edge in Sobel operator to detect edges, and then uses canny operator...
In order to systematically study the relationship between scattered risk factors and overall risk of power coal supply chain system, risk element transmission Petri net (for short, RPN) system was constructed to analyze and control the risk elements' transmission and influence on the entire power coal supply chain. In this paper, some basic definitions of risk element and transmission function were...
A modified GM (1,2) model is proposed to simulate the runoff. Zhoukou and Tanghe station was taken as an example. The results show that the modified model was a means to better understand the significance of runoff variability upon climate change. The influence of the future climate change on hydrological processes was discussed. The runoff in this valley is projected on this basis according to the...
For all sorts of problems in the procedure of high-power induction motor's starting, as well as the drawbacks of traditional starting method. This paper proposed the full-voltage starting method of high-power induction motor with dynamic reactive power compensation, introduced its principle, and studied the control strategy of full-voltage starting with dynamic var compensation emphatically, established...
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