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Mobile Crowdsensing is a promising paradigm for ubiquitous sensing, which explores the tremendous data collected by mobile smart devices with prominent spatial-temporal coverage. As a fundamental property of Mobile Crowdsensing Systems, temporally recruited mobile users can provide agile, fine-grained, and economical sensing labors, however their self-interest cannot guarantee the quality of the sensing...
Topic models employ the Bag-of-Words (BOW) representation, which break terms into constituent words and treat words as surface strings without assuming predefined knowledge about word meaning. In this paper, we propose the Semantic Concept Latent Dirichlet Allocation (SCLDA) and Semantic Concept Hierarchical Dirichlet Process (SCHDP) based approaches by representing text as meaningful concepts rather...
The excessive vibration of hydraulic pipelines in aircraft is an important safety issue. The traditional vibration control method paid more focus on the pipe vibration which is the end of vibration energy flow not the vibration origin. Pressure fluctuation of the hydraulic oil causes the pipes vibration directly. The system impedance is a key factor to the hydraulic pressure fluctuation under the...
Non-Volatile Memory (NVM) has many advantages, such as non-volatility, high density, shock-resistivity, and low leakage power, and disadvantages, such as the relatively high write energy and limited write endurance. It also has the feature of writing more slowly than reading. We design a read-modify-write strategy called MinFS for NVM-based main memory to reduce the number of update bits and prolong...
With the development of science and technique, E-Learning is used widely in education. A large set of detail information brought by E-Learning can be analyzed to find questions in education, but analytics is hard to be done because of big data. To solve this problem, this paper introduces visual analytics into E-Learning, including a group analysis component(GAC) and a case analysis component(CAC)...
Network functions are widely deployed in modern networks, providing various network services ranging from intrusion detection to HTTP caching, for the purpose of performance, security or policy compliance. According to a recent survey [6], network function deployments are ubiquitous: on par with the number of L3 infrastructures. Application or user requirements may specify policies that require flows...
A NAND flash block must be erased before the I/O system rewrites the pages in it. When a full block (garbage) is erased, its valid pages should be copied to another place. Variable page copy operations cause uncertain garbage collection latency. Most of existing real-time flash translation layer (FTL) schemes use partial garbage collection to hide long write operation latency and provide a predictable...
As tenants take networked virtual machines (VMs) as their requirements, effective placement of VMs is needed to reduce the network cost in cloud data centers. The cost is one of the major concerns for the cloud providers. In addition to the cost caused by network traffics (N-cost), the cost caused by the utilization of physical machines (PM-cost) is also non-negligible. In this paper, we focus on...
The traffic of wireless networks changes in time and spatial distribution. When the traffic load is low, some base stations (BSs) can be sleep mode even been turned off to improve system energy efficiency, the corresponding traffic can be provided by the rest active base stations. In this paper, firstly, considering users with different locations and Quality of Service (QoS) requirements in actual...
This paper studies the restoration of fragmented 2D digital pictures. Automatic reassembly of image fragments can facilitate many tasks in archaeology, forensics, and digital media. We propose an integrated algorithm for this important yet challenging problem. Our algorithm first determines the adjacency relationship among fragments, then effectively matches subpieces and refines the reassembly iteratively.
Network virtualization is viewed as a promising way for overcoming the ossification of the Internet. Virtual network mapping plays an important role in building virtual networks. The substrate network conditions change synchronously when the process of virtual network mapping, when a network failure happens, virtual network mapping without protection may lead to virtual network service interruption...
Conventional wisdom in inverse halftoning heavily relies on the assumption about the local smoothness of image signals. Motivated by the effectiveness of nonlocal denoising, we propose a new class of inverse halftoning techniques using nonlocal regularization in this paper. The continuous-tone image is characterized by the intersection of two constraint sets - one related to the quantization process...
Important structures in photographic images such as edges and textures are jointly characterized by local variation and nonlocal invariance (similarity). Both of them provide valuable heuristics to the regularization of image restoration process. In this paper, we propose to explore two sets of complementary ideas: 1) locally learn PCA-based dictionaries and estimate the sparsity regularization parameters...
Considering alternative resources for operations, requirement of multiple resources to process an operation and a jobpsilas batch size greater than one in the real manufacturing environment, a study is made on the batch splitting scheduling problem with bounded batch sizes under multiple-resource constraints, based on the objective to minimize the maximum completion time. A genetic algorithm which...
This paper presents specific hardware and components which can be used to implement optimal control strategies via wireless communication channels to achieve path tracking. The position of the robot at each time instant is found by implementing a localization algorithm. Simulations results are presented using robust and Linear Quadratic Gaussian (LQG) controller architectures. The overall aim of this...
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