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In this paper, we consider the direction-of-arrivals (DOAs) estimation of coherent narrowband signals impinging on an arbitrary linear array in a computational efficient way. A new interpolation transform based modified Capon beam-forming method is proposed without eigendecomposition, where the arbitrary linear array is transformed to a virtual uniform linear array (ULA) by utilizing the interpolation...
In this paper, we consider a millimeter wave (mmWave) multiple-input multiple-output (MIMO) communication system with hybrid beamforming architecture. To search the optimal beam pair, the beam sweeping algorithm is complex and time-consuming in the case of initial access and beam switching. With the aim of improving the robustness, we propose a novel beam management scheme to quickly determine the...
This paper proposes an anti-hepatitis B virus (HBV) infection treatment model with an immune response term and an alanine aminotransferase (ALT) term. This model has five variables, which can be used to describe the evolution dynamics of the related clinical data of the chronic hepatitis B (CHB) patients. We use this model to simulate the dynamics of evolutions of serum HBV DNA levels and ALT levels...
This paper studies boundary control for function projective synchronization of a complex sptio-temporal network with time-varying delays and nonlinear terms satisfying the Lipschitz condition. A boundary controller based on distributed measures is studied for function projective synchronization. Using Lyapunov's direct method, the problem of existence of the controller is formulated as the feasibility...
On the basis of analyzing the structural characteristics of low-voltage power distribution network, the input impedance of out-door low-voltage distribution network is measured and analyzed. Taking a university laboratory and a residential neighborhood as representative, the input impedance of the low-voltage distribution network within the frequency band from 1MHz to 30MHz is measured. The results...
To solve the problem of predicting the service life of smart electricity meters, this paper proposes a life estimation method using the hypothetical model and field operation data. First, the hypothetical model is studied. Analyzing the influence of temperature, humidity and current on the operational reliability of electronic equipment, the reliability model of smart electricity meter with acceleration...
Based on organic semiconductor polymer MEH-PPV ridge waveguide, a new type of 1-D organic edge-emitting photonic crystal laser is proposed, which consists two perfect photonic crystal structures as a resonator to apply feedback and a defective photonic crystal as a mode selection component to suppress the multi-mode competition. It realized lasing at a wavelength of 618nm.
Buffer sharing based on pipeline parallelism is quite susceptible to inter-core communication overhead. Existing work on concurrent lock-free (CLF) queue algorithm did not take full advantage of CPU cache features to improve performance. In order to implement a fast single-producer-single-consumer (SPSC) buffer scheduling queue, this paper proposes a cache-friendly CLF queue scheduling algorithm (CFCLF),...
The development of mobile industry promotes a deep progress of mobile applications, such as vehicular social networks (VSNs), which afford large scale data sharing between vehicles. However, trustworthiness has still been a potential security issue. Traditional public key infrastructure (PKI) cannot restrain malicious users as they are authorized in VSNs. For the reason, this paper proposes a trust...
Crowdsourcing coordinates a large group of workers online to do self-contained small tasks that are published by job requesters on a crowdsourcing platform. Many papers propose incentive strategies to motivate workers to participate in crowdsourcing. In this paper, we shift the focus from the workers to the job requesters by addressing two of their issues: how to design a good payment scheme to maximize...
A DRAM with multiple-refresh-period (MRP) method is one of effective refresh power reduction techniques. To support the MRP method, effective test methods for classifying the refresh period of each DRAM block are needed. In this paper, we propose an effective test method for classifying the refresh periods of DRAM blocks. Also, a programmable built-in self-test (BIST) scheme being able to support...
With the acceleration of IP traffic and urbanization, Device-to-Device (D2D) communication has appeared as a promising solution to delivering contents to mobile users in a timely manner in smart cities by offloading traffic from the overburdened cellular infrastructure. The process to distribute the new content to all the interested devices is called content synchronization. After all the interested...
According to the characteristics of positive and negative edge of signed networks, a new signed networks community detection algorithm BTCN_SNCD (Signed networks Community Detection Based on the Tightness of Common Neighbors) is proposed based on the tightness of common neighbors. Firstly, in view of the shortcomings of the traditional local similarity metrics only considering the number of common...
The chunk-lookup disk bottleneck and the read amplification problems are two great challenges for deduplication-based storage systems and restrict the applicability of data deduplication for large-scale data volumes. Previous studies and our experimental evaluations have shown that the amount of redundant data shared among different types of applications is negligible. Based on the observations, we...
Fast moving objects are important objects of concern for deep space exploration or astronomical missions. Challenges in accurately locating these objects (especially at the sub-pixel level) include motion blur caused by the fast movement and the defocusing of optical sensors. In this letter, we explore a new method for removing these effects. Instead of estimating each of the effects individually...
With the shrinking of technology node, the data retention time of DRAM (DRAM) cells is widespread. Thus, the number of the cells with data retention faults is increased. In this paper, therefore, we propose a built-in self-repair (BISR) scheme for DRAMs using redundancies with physical and logical reconfiguration mechanisms. Spare rows and columns with physical reconfiguration mechanism are used to...
Memristor is a resistive device which is considered as an alternative non-volatile device for future non-volatile memories. For a memristor memory, a reference current is needed for discriminating the high-resistance (ROFF) state from low-resistance (RON) state. The reference current has an impact on the yield and reliability of the memristor memory. In this paper, we propose a test method in associate...
For the research on control method of leg exoskeleton for carrying payload, a leg exoskeleton prototype called ELEBOT (ECUST Leg Exoskeleton roBOT) has been built. To increase the load-carrying ability of exoskeleton, pseudo–anthropomorphic mechanical structure, a kind of efficient, low-flow pump-valve hybrid controlled hydraulic actuator, custom sensing shoes and other electrical components for control...
The Paper propose a processing method for LiDAR data in power line inspection tour. The classification of the point cloud with the data feature in the patrol is the first step. On this basis, using the geometric information of different types of point cloud in feature extraction and statistical analysis to obtain the cross-cutting and security risks information which is required by the power line...
the regularization theory is a key tool for geophysical inversions. In this paper, two regularization parameters are introduced into the magnetotelluric (MT)-gravity joint inversion. The very fast simulated annealing (VFSA) method is adopted to optimize the objective functional of the joint inversion. In view of the randomness of VFSA method for model productions, a new adaptive method is proposed...
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