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With the accelerating process of urbanization, rural migrant workers flood into the cities. Research projects that aim at resettlement and employment promotion of these workers, social stability, as well as economic development have drawn attention of government and scholars alike. With respect to the matching problems of urban employment of rural migrant workers, grey incidence analysis and two-sided...
In order to ensure the accuracy of course control and achieve good performance on roll stabilization, this paper designs rudder/fm joint SMC system, thereby improving ship's course stability, security and comfort of crew and passenger. Aiming at ship motion with the features of nonlinearity, strong coupling, multivariable and complex sea condition, this paper establishes the ship motion mathematical...
Considering a series of problems such as the sea wave that acts on the ship is random when ship is sailing on the sea, there exists serious nonlinearity and uncertain factors in the ship roll motion, there is strong dependence on the mathematical model of the controlled object when designing the controller for fin stabilizer system. Aiming at solving the above problems, the paper designs the cloud-model...
Because molecular distillation is a complex system with many variables, strong coupling, nonlinearity and large hysteresis, it is difficult to establish an accurate model to achieve effective control. In order to stabilize the production process, BP network is used to establish the molecular distillation system model and proposes Dual Heuristic Dynamic Programming (DHP) algorithm based on BP. For...
Block-matching and 3D filtering (BM3D) has showngreat power for image denoising. By decomposing the BM3Drestored image into three orthogonal subbands, we find thatthe subband of the high-frequency component, of which thewavelet coefficients are less than a given threshold, has madesome true textures of the original image lost and, the PSNR ofthe restored image is pulled down. Therefore, in this paper,...
This work focuses on micro-grid, containing various alternative energy resources (wind and photovoltaic) and super-capacitor energy storage system which performs in stand-alone as well as in grid-connected modes. Various non-isolated converters are used to control the proposed micro-grid. A classical-based supervisory control scheme is designed to perform energy management in order to satisfy the...
For the wiped film molecular distillation system which has the characteristics of multiple parameter, large inertia, large time delay, nonlinearity and others, adjustment it's parameters mainly bases on human experience. In order to stabilize the production process, Extreme Learning Machine network is used to model the molecular distillation system and proposes heuristic dynamic programming algorithm...
The efficient cooling is very important for a light emitting diode (LED) module because both the energy efficiency and lifespan decrease significantly as the junction temperature increases. The fin heat sink is commonly used for cooling LED modules with natural convection conditions. This work proposed a new design method for high-power LED lamp cooling by combining plate fins with pin fins and oblique...
Network virtualization (NV) is an indispensable approach to handle the ossification of current Internet. Previous research has been conducted concerning the implementation issues like heuristic-based mapping algorithms, yet little has focused on quality of service (QoS) for end users who launch virtual network (VN) requests, and revenue both service providers and infrastructure providers can obtain...
For the specifics of speed regulation of Surface Mounted Permanent Magnet Synchronous Motor (SPMSM), this paper presents a novel algorithm focused on phase-lead compensation and current estimation. Conventional speed control algorithm was commonly consisted of a speed regulator and a current regulator which based on Filed Orient Control (FOC), however, the complicated control scheme of FOC has brought...
Aimed at the characteristics of nonlinear, strong coupling, multi-variable and natural unstable for inverted pendulum, based on information fusion technology, the state feedback gain matrix with quadratic optimal performance index is adopted as fusion function to reduce dimension of the outputs vector for double inverted pendulum, and decrease the difficulty of controller design. On this basis, a...
Sequential data modeling has received growing interests due to its impact on real world problems. Sequential data is ubiquitous -- financial transactions, advertise conversions and disease evolution are examples of sequential data. A long-standing challenge in sequential data modeling is how to capture the strong hidden correlations among complex features in high volumes. The sparsity and skewness...
Control of grid-connected inverter (GCI) directly affects the performance of inverter-interfaced distributed generators. In this paper, a circuit-based modeling method is proposed to combine the control algorithm in software and the topology configuration in hardware of a GCI. On the basis of the same mathematical model, control blocks are equivalently changed into circuit models. By using the proposed...
Grid-connected inverter are commonly utilized to interface renewable energy sources into the utility, especially for micro-grid and distributed generation system applications. Different from available direct power, direct voltage, or direct current based control strategies of grid-connected inverters for renewable energy integration, to achieve flexible operation, the direct impedance control of grid-connected...
An advanced 10000 TEU container ship is adapted as the main object of study in this paper. According to the law of energy conservation and thermodynamic principle, the mathematical models for major components of fuel oil viscosity control system (FOVCS) of marine diesel engine are established. For being insensitive to parameter variation or disturbance and the advantage of fast response, sliding mode...
Due to the explosive growth of multimedia content (especially videos) over the Internet, content-centric networking (CCN) is proposed to remit the problems of modern bandwidth-intensive Internet usage patterns. Additionally, the current streaming media coding is designed for video service for IP networks. However, there are few researches who concentrate on efficient streaming media coding for the...
Recently mathematical formula retrieval has become a hot and difficult problem in the field of information science research. The paper presents an N-grams division method of mathematical formula, determines the granularities of division by experiments, and proposes calculating method of a sub-formula weight based on the complexity of formula, the length of N-grams and depth. In addition, this paper...
This paper investigates the Lithium-ion battery remaining useful life (RUL) prediction problem under grey model framework. The Lithium-ion battery capacity degradation is described with the help of grey model and revised grey model, respectively, and the least squares is employed to identify the unknown parameters in the grey models. Then the RUL prediction is presented based on the grey models. The...
The particle filtering (PF) algorithm is employed to predict Lithium-ion battery end-of-discharge time. The work voltage degradation model with six states is presented in the nonlinear state-space form, and the states such as model unknown parameters and work voltage are estimated by PF algorithm. Then the end-of-discharge time with probability distribution is further given by PF algorithm. The experimental...
Considering the nonlinearity, parameters perturbation and random waves disturbance to the ship fin stabilizer system during ship sailing on the rough sea, a robust controller based on sliding mode control which incorporates fuzzy tuning technique is proposed in this paper. The sliding mode control is used to force the ship roll to zero. The fuzzy tuning is adopted to eliminate the chattering of control...
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