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Sliding mode control is a kind of variable structure control method and it has better performance of robustness and anti-disturbance. However, discretizing the continuous sliding mode control and applying it to computer control system will lead to chattering definitely. To solve the question, this paper proposes a new design method for a double tank system according to the design idea of Utkin for...
A dual band-notched two-element UWB-MIMO step slot antenna with a very compact size of 23¡Á21¡Á0.8 mm3 is presented. By etching two rectangular slots from the middle of the ground plane, the impedance matching of the antenna in 3-4 GHz and isolation of two ports are considerably improved. With the implementation of three pairs of open-ended quarter-wavelength split slots near two radiating slots,...
The tracking methods under the online multiple instance learning(MIL) framework always use single channel's information or transform the RGB image to gray image for color video tracking, which may cause the information loss of the color image. In addition, the MIL tracker only use the haar-like feature to construct the target appearance and ignore the different samples have different importance to...
With the scale of the city and the population rising in a very fast way, drainage system of cities in our country are facing huge challenge and pressure. For now, the drainage devices are overrunning and aging without timely maintenance which makes the whole drainage system running in a high risk. So there's a great need to establish a reliable evaluation system of the quantitative analysis and evaluation...
Matrix inverse computation is one of the most fundamental mathematical problems in large-scale data analytics and computing. It is often too expensive to be solved in resource-constrained devices such as sensors. Outsourcing the computation task to a cloud server or a fog server is a potential approach as the server is able to perform large-scale scientific computations on behalf of resource-constrained...
It is commonly the case that a small number of widely used applications make up a large fraction of the workload of HPC centers. Predicting the performance of important applications running on specific processors enables HPC centers to design best performing system configurations and to insure good performance for the most popular applications on new systems. In the analyses presented in this paper...
Drainage pumping station is an indispensable part of the drainage works, and the water hub for the urban drainage system's normal operation. The water cycle and transportation in urban drainage system are completed by a series of different functions of the drainage pumping stations, which burden the task of pumping the domestic sewage, industrial waste water and rainwater to the downstream pipe, water...
Multiple-input multiple-output (MIMO) technique exploits advanced signal processing and multiple antennas to increase wireless transmission data rates as well as suppressing interference and improving received signal-to-noise ratio (SNR). The technique is widely used in many mobile communication systems. In the aerospace communication environment, data rate and SNR are important factors when considering...
Distributed Denial of Service (DDoS) is a sophisticated cyber-attack due to its variety of types and techniques. The traditional mitigation method of this attack is to deploy dedicated security appliances such as firewall, load balancer, etc. However, due to the limited capacity of the hardware and the potential high volume of DDoS traffic, it may not be able to defend all the attacks. Therefore,...
Secure file transfer sessions in File Transfer Protocol (FTP) is becoming an essential process of prevention and detection the intrusive behaviors nowadays. In this paper, we propose scalable stochastic fingerprints to secure and classify encrypted traffic in File Transfer Protocol (FTP) using Kerberos method instead of Secure Sockets Layers (SSL) method. On the first part, we define Kerberos method...
In this paper, we investigate the problem of jammer selection for securing Cooperative Cognitive Radio Networks (CCRNs) with the Multiple-Input Multiple- Output (MIMO) capability. In the CCRN under our consideration, there exist a pair of Primary Users (PUs), a relay node, a number of Secondary User (SU) pairs, and an eavesdropper. The PUs need to select a pair of SUs as jammers to interfere with...
Due to the exponentially increasing size of design space of microprocessors and time-consuming simulations, predictive models have been widely employed in design space exploration (DSE). Traditional approaches mostly build a program-specific predictor that needs a large number of program-specific samples. Thus considerable simulation cost is required for each program. In this paper, we study the novel...
Data centers are extremely important facilities that contain core business information and applications, but the energy consumption is an inevitable issue, so the thermal distribution monitoring is critical for data centers reliable and stable operation. Thermal information enables monitoring and autonomic thermal management in large data centers. Recent approaches that employed a mobile robot or...
For present distribution transformer failure rate prediction model, load and weather forecast information in the future have been not considered. In this paper, distribution transformer failure rate prediction model with parameters is proposed. Firstly, the characteristics of several common failure rate models are analyzed. The failure rate model combined the health index and operating time is established...
This work introduces a wideband printed patch antenna design for 60 GHz radio applications. The proposed antenna is a single-layer structure with J-shaped slots loaded on the patch for the impedance bandwidth enhancement. The function of the J-shaped slots provides an additional current path for generating the second resonance of the patch. With this additional resonance, the antenna could find double...
Condition-based maintenance (CBM) strategies for power equipment are influenced by many factors, such as the equipment's health condition, connecting relations between each equipment and the load level of a substation. This paper presents a new method to optimize the maintenance strategies for different power equipment. Through analyzing the connection relation between different equipment, some of...
Targeting to reduce the traffic accident and improve the traffic efficiency, vehicular network is designed to do message exchange via vehicle to vehicle (V2V) and vehicle to infrastructure (V2I) communications. For V2V communications, orthogonal resources (i.e., time slot) are usually allocated for every vehicle to avoid collisions in V2V communications, which needs complex signaling between vehicles...
Reliable life is defined as the average operation time of power equipment in a given reliability, and it is a significant parameter in reliability evaluation. This paper presents a reliable life calculation method for SF6 circuit breakers. The reliability evaluation model is established based on Fault Tree Analysis (FTA) method. From FTA, all the bottom events which cause top event (failure of the...
Brain ischemia is a neurological deficit caused by a reduction in the blood supply to tissue, and one of the leading causes of disability in the world. Currently, the most well-known therapeutic agent for ischemia recovery is recombinant tissue plasminogen activator (rtPA), but it is viable for only a small portion (approximately 3.6%) of ischemic patients and may cause side effects such as tissue...
A novel band-pass Frequency Selective Surface (FSS) working on L-band is presented in this paper. By means of the coupling effect of the metallic patches on three different layers, the distributed capacitance of the periodic structure is formed and therefore decreases the resonant frequency. Investigations on the structure variables are presented and a novel unit cell, whose size is only λ0/20, is...
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