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Noise analysis of a widely used switched capacitor unity gain sampler is presented, which in detail shows that the circuit structure can not only get rid of the offset voltage induced by the OTA involved, but also has the ability of suppressing 1/f noise with operation timing of the sampling capacitor, functioning as correlated double sampling in fact, however paying the price of increasing thermal...
A quasi Z-source (QZS) network is coupled to the direct matrix converter (DMC) and a novel strategy of dual space vector modulation is proposed. It can effectively solve the defect of lower voltage transfer ratio of traditional matrix converter. The DMC which introduced the QZS can allow the three phase AC input side short circuit which defined shoot-through state. It can achieve the AC input voltage...
With the rapid development of big data analytics in online marketing, real-time bidding (RTB) has emerged as a promising business model in recent years, and now becomes one of the major online advertising channels. Based on analysis of Web Cookies, RTB platforms are able to precisely identify the features and preferences of target audiences visiting publishers' websites, and forward the generated...
In the paper, considering the limitation of effective method in E-learning area, a recommendation framework for E-Learning based on deep learning is proposed. Our model is based on deep learning, which has strong capability to learn from large-scale data. It has some improvements than previous methods. First, it is based on the conventional K-Nearnest Neighbor(KNN) method to train a model, thus its...
Intermodal road-rail transportation Systems (IRRTS) is a typical complex giant system which is dilïîcult for traditional management approaches to form effective solutions with dynamic adaptability. In the physical world, simple equipment upgrading and transport optimization can't satisfy the demand of IRRTS for high efficiency and low cost. Thus, a framework of parallel IRRTS based on ACP approach...
Correlated double sampling(CDS) operation is generally used in CMOS imaging systems, implemented by switched capacitor(SC) circuits, to get rid of reset noise and decrease flicker noise. This paper presents an optimization method for the noise performance of a CDS circuit, the advantage of which is its ability of canceling the offset of the OP involved. The structure of the CDS circuit is analyzed...
Gait training is one of main means of rehabilitation of lower limb disfunction. Nevertheless, the promotion of clinical gait training is inhibited by the professional skill and labor consumption of physiatrist. It is with great practical value to design an automatic rehabilitation equipment which could increase the effectiveness and quality of training progress, meanwhile reduce labor costs. In this...
An ALQR (Adaptive Linear Quadratic Regulation) method for the variable speed wind turbines system is proposed in this paper. The controller is designed for the wind turbine operating in the low wind speed (Region 2), in which the pitch of the blades is fixed at the optimal angle. Since the wind turbine is a nonlinear system, the Kalman filter and the adaptive method are implemented in the controller...
This paper considers the problem of decentralized, cooperative, and dynamic self-localization in wireless sensor networks. In particular, we are interested in a restrictive but very realistic scenario where few anchors are deployed and each anchor whose location is priori known may only communicate with very few agents (e.g. just one agent) whose location is unknown and to-be-estimated. The lack of...
The forward kinematics analysis of the six-degree-of-freedom(DOF) spindle-coupled road simulator (SCRS) with a complex hybrid serial-parallel mechanism(HSPM) has been performed. The forward kinematics with an efficient method is significant for control, singularity and workspace analysis of SCRS. Applying the vector matrix theory, the geometric restriction function was expressed in concise and compact...
In both the traditional diode uncontrollable rectifier circuit and thyristor phased rectifier circuit, the shortcomings of low power factor are difficult to overcome. PWM rectifier circuit is to use full control power switch devices and adopts PWM control mode of rectifier circuit, through the adoption of appropriate control strategies and PWM modulation technology, PWM rectifier circuit can realize...
Based on Computational Fluid Dynamics, ship's righting arms of different heeling angles were calculated to study ship's stability loss in following sea. First, based on the wave-generation method of defining inlet boundary conditions, the numerical wave tank was constructed for ship's movement in surf-riding. Second, one slender ship's flow filed in calm water was numerically simulated, and the righting...
A maximum current automatic current-sharing control method is implemented for high performance control of paralleling Buck converters based on DSP controller. The system samples the output current and sends it to a high precision instrumentation amplifier INA128 to amplify. Then, the amplified signal is sent to each parallel module by ADC module through CAN bus, and transmitted back to DSP after decoded...
The large amount of noise returns in single photon Lidar (SPL) point clouds represent a significant challenge for the utilization of these new generation laser scanning systems. Numerous filtering methods have been proposed that attempt to effectively remove noise points from the final point cloud model. However, weak signal points have similar characteristics as noise returns, and thus can be incorrectly...
Pedestrian detection, as an important task in video surveillance and forensics applications, has been widely studied. However, its performance is unsatisfactory especially in the low resolution conditions. In realistic scenarios, the size of pedestrians in the images is often small, and detection can be challenging. To solve this problem, this paper proposes a novel resolution-score discriminative...
In order to design a three-dimensional WebGIS which describes the geographic information of a smaller region like Huaiyin Institute of Technology, a method for building WebGIS is proposed. In details, LocaSpace Viewer and SketchUp are used to draw maps, ArcGIS API for JavaScript is used to develop project and Tomcat, ArcGIS Server is used to load users requests. Experiments show that the application...
Nonnegative matrix factorization (NMF) as a popular technique to find parts-based representations of nonnegative data has been widely used in real-world applications. Often the data which these applications process, such as motion sequences and video clips, are with ordered structure, i.e., consecutive neighbouring data samples are very likely share similar features unless a sudden change occurs....
In industrial process field, the integrations of model predictive control (MPC) and hierarchical control system are widely used. A new double-layered model predictive control strategy with dynamic trajectory calculation (DTC) in its upper layer is presented in this paper, which can be applied in the midst of a hierarchical control system. DTC includes a feasibility stage with prioritized constraints...
Aiming at the problem of frequency stability of contactless power transmission system, a self-oscillating inductive coupled power transfer system suiting for parallel resonance is proposed. The switching frequency is automatically tracked through designing the start-up circuit to monitor the zero-crossing of the resonant network voltage and taking the zero-crossing as the condition to drive switches...
Aiming at the complicated control problem of the existing inductively coupled power transfer system, a self-oscillating control method for the push-pull resonant converter with parallel-series compensation is proposed. The necessity of designing the start-up circuit is explained by illustrating the principle of self-oscillating control. Based on the analysis of the energy transfer mechanism of the...
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