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This paper concerns the uplink (UL) and downlink decoupled access in heterogeneous networks (HetNets) with multi-antenna base stations (BSs). Departure from the traditional minimum pathloss policy, a maximum UL signal-to-noise ratio (SNR) user association policy that takes account of multiple antennas at BSs is proposed. Based on the proposed association policy, the UL association probabilities and...
Underwater images often suffer from color and contrast degradation, because the light is absorbed and scattered while traveling in water. Although the physical process of the underwater images seems similar to the outdoor haze images, conventional dehazing methods fail to generate accurate results since colors associated to different wavelengths have different attenuation rates in underwater conditions...
With the rapid development of sensor technology on vehicles, more and more vehicles are checked from artificial detection to auto monitoring. A great number of real-time data acquired from sensors provides important foundation for PHM application on vehicles. Aiming at the special mining vehicle, it proposes the solution for real-time monitoring, fault diagnosis and health management based on the...
This paper proposes the Anchored Kernel Metric Learning (AKML) method, which learns metrics by sparsely combining locally discriminative rank-1 basis matrices in the anchored kernel induced space. First, we apply k-means clustering to generate anchored samples, thus forming an anchored sample matrix. Based on the assumption that the basis matrices can be formulated as linear combinations of anchored...
It is interesting to find the clustering with potential value in financial time series. In this paper, we focus on this topic. The owned features of the clusters with potential value are provided firstly. Then, the agglomerative hierarchical clustering (AHC) is used to find those clusters automatically. There are two innovations in this paper. The first one is that the features of the clusters with...
In this paper, we investigate the multi-coordination problem of a group of coupled nonidentical agents under partial impulsive control. The main feature of multi-coordination behavior is that the connected network is separated into subgroups, and the agents in the same group are of quasi-synchronization, while there is no synchronization among different groups. To make the agents achieve this collective...
A dynamically reconfigurable cryptographic processor (DRCP), which are driven by configuration context, has been proven to be efficient and cost-effective in the block cryptography domains. Two techniques focused on optimizing the context-parsing organization and the context memory are proposed: 1) The classification-based multi-concurrent configuration (CMC) can obviously reduce the parsing time...
Life prediction is the key part of the Prognostics and Health Management for lithium-ion batteries and it is an important means to master the decline tendency of power performance. In this paper, we have established a simplified and effective double exponential distribution capacity attenuation model through the analysis of data from the NASA Ames Center accelerated life test. Based on the model,...
A channel-selecting, low-noise amplifier (CSLNA) is presented that meets the requirements for a SAW-less diversity path receiver in frequency-division duplexing (FDD) cellular systems. An N-path filter is incorporated into the LNA feedback network to tune from 400 MHz to 6 GHz. The proposed CS-LNA creates close-in stopbands around the passband to suppress transmit (TX) blockers up to 17 dBm. This...
In this paper, we propose a novel additive cancellation signal (ACS) method for sidelobe suppression in non-contiguous orthogonal frequency division multiplexing (NC-OFDM) based CR systems. The key idea of the proposed method is to dynamically add several additive cancellation symbols on both the primary user (PU) subcarriers and the secondary user (SU) subcarriers, to generate the additive cancellation...
Virtual Network Mapping (VNM) has been a key issue for network virtualization need to be addressed. A traditional substrate network is usually managed by multicast InPs, and many applications in the substrate network can be characterized by hybrid virtual networks with both unicast and multicast requests. However, to the best of our knowledge, few researches focus on the problem of hybrid virtual...
Nowadays, the Infrastructure as a Service (IaaS) cloud has become the new target of attackers and the security of virtual machine (VM) in cloud is attracting more and more attention. In this pater, we propose to use virtualization to combine information of system level with that of network level and monitor the behavior of VM at the granularity of process. Based on Xen hypervisor, we implement this...
Recently, Lithium-ion battery has been used in electric vehicles, portable electronic devices, even aerospace and other fields, since its many advantages compare to the other conventional batteries. At the same time, the estimation of state of charge (SOC), cycle life and other performance for lithium-ion batteries become research focus in the related fields, in order to ensure that the operation...
The study of the changing trends of the performance of the spacecraft is helpful to the estimation of the remaining usage life (RUL), which is the important basis of the realization of the spacecraft prognostics and health management. The types of the spacecraft telemetry data include the slow change, periodic change, abrupt change and the combination of the above three changes. This paper firstly...
Helicopter rotor system consists of a large number of dynamic components, and works in a single-channel and complex environment, which is a critical system that ensures the helicopter reliability and security. Because the data on the rotating parts is not easy to measure, and the noise environment is complex, the rotor fault detection capacity is limited, thus seriously affecting the reliability and...
For the high reliability and low cost benefits, the strapdown inertial navigation systems are widely applied to weapon systems. During the using course, the reliability and performance of strapdown inertial navigation system will degenerate periodically. As known, the system has service life which provided by fabricant, but it also has storage life which is influenced by the storage elements, such...
Hydrodynamics of underwater supercavitating vehicles are characterized by coupling relationship between body and cavitation. While maneuvering, supercavitating vehicle depends on a bank-to-turn strategy for making a turn, and could not be described exactly by the kinematic model built under the condition of straight line navigation. Based on cavitation theory of unattached expansion, the paper establishes...
Based on texture visual features, region segmentation operator and quantization step equations were put forward. This guarantees the transparency of carrier image and the robustness of watermarking image extracted. After segmentation, the texture contour was clear, and the segmented results of smooth and texture region were satisfying. And it brought up the pixel value adjustment operator of IDWT...
Underwater supercavitating vehicles are characterized by drag is localized at the nose of the vehicle where a cavitator generates a cavity that completely envelops the body. Section 2 establishes and analyzes both the kinematic and fixed-depth models using a joint control method for cavitator and tail control surfaces. Section 3 synthesizes the control law based on robust pole assignment approach...
To improve the performance of in-loop deblocking filter in H.264/AVC, this paper proposes a pipelined hardware architecture. A novel transposer design is presented and its hardware cost is reduced by 15% with forwarding logic to shift pixels. Through adopting a filtering order with vertical and horizontal edges processed alternately, on-chip memory is greatly saved and only two 32times32 bits SRAMs...
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