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The selection of virtualized network functions (VNFs) in service provisioning is a critical issue in inter-datacenter elastic optical networks. In this paper, considering load balancing of IT and spectrum resources, we propose two joint balancingfactors, i.e., Global Balancing factor (GB-factor) and Local Balancing factor (LB-factor) for VNFs selection. Then a Joint-Optimization Selection (JOS) algorithm...
ORAM scheme is becoming a study hotspot to access data securely, whether ORAM is based on layer or tree structure, client cache always exists in different ORAM. Some smart devices for example, ceil phone may be as a user with small capacity associated with cloud storage. The optimal client cache should be limited to small constant size or a strict small upper bound. The paper designs a novel client...
Aiming at the real-time monitoring of Sewage in the service area. This paper presents a sewage quality monitoring system based on ZigBee wireless sensor network. Wireless sensor networks adopt star structure, the system consists of data acquisition terminal node, the coordinator node and the monitoring center. The terminal node sends the collected data to the coordinator node, Coordinator node sends...
The wireless monitoring and management system of tower crane based on Modbus / TCP protocol is designed for the distributed, efficient and safe operation of tower crane. Designing monitor surveillance terminal with Cortex A8 and WinCE6 as platform for real-time monitoring of state information of tower crane operation. And then, Using Modbus / TCP protocol to design a wireless communication message,...
Internet of Things (IoT) serves not only as an essential part of the new generation information technology but as an important development stage in the information era. IoT devices such as unmanned aerial vehicles, robots and wearable equipments have been widely used in recent years. For most organizations' inner networks, innumerable dynamic connections with Internet accessible IoT devices occur...
It has become routine for large volumes of data to be generated, stored, and processed across geographically distributed datacenters. To run a single data analytic job on such geo-distributed data, recent research proposed to distribute its tasks across datacenters, considering both data locality and network bandwidth across datacenters. Yet, it remains an open problem in the more general case, where...
Fair and efficient coflow scheduling improves application-level networking performance in today's datacenters. Ideally, a coflow scheduler should provide isolation guarantees on the minimum coflow progress to achieve predictable networking performance. Network operators, on the other hand, strive to decrease the average coflow completion time (CCT). Unfortunately, optimal isolation guarantees and...
Running on a size-reduction network simulated by a given large-scale topology can obviously enhance the time efficiency. In this paper, we realize the size-reduction using the input extracting of a network simulator and evaluate the similarity between the size-reduction and given topologies using multiple criterions. The evaluation result verifies that the network simulation with input extracting...
Virtual machine live migration technology allows a running VM migrates from one physical host to another with no impact on users. As the scale of distributed computing gets larger and larger, hybrid cloud, which is integrated cloud service utilizing both private and public clouds to perform distinct functions within the same organization becomes a hotspot for both academia and industry. Thus, it will...
The physical (PHY) layer peak rate of the wireless local area network (WLAN) has been almost exponentially improved over the past 15 years since 1999. However, it is proved that the throughput is very low comparing to the PHY peak rate, and the media access control (MAC) efficiency is very low in the current WLANs specification, especially in dense deployment scenarios. Therefore, to achieve high...
This article focuses on the study of detecting key individuals in terrorist network, combining the theories and algorithms of Social Network Analysis (SNA), Multi-meta Network Analysis and Fuzzy Analytical Network Process (FANP). Firstly an index system is built and then within this system the scores of terrorists are calculated, referencing the measures (total degree, betweenness, closeness, etc)...
The use of agent based social simulation in computational analysis of public emergency management is becoming a prominent approach in social science research. Due to the complexity of rumor spreading and the radical emotion infecting processes, the results of the group emotion evolution analysis often lose effectiveness, which will affect the control and strategy establishment in emergency management...
Fair bandwidth allocation in datacenter networks has been a focus of research recently, yet this has not received adequate attention in the context of private cloud, where link bandwidth is often shared among applications running data parallel frameworks, such as MapReduce. In this paper, we introduce a rigorous definition of performance-centric fairness, with the guiding principle that the performance...
As we enter the big data era, digital world is growing fast and becomes more and more complex in nature, many content-oriented applications require both features of high performance full-text searching and rich functional online data analyzing. In this paper, we exploit the features of both web search and parallel DBMSs to address the challenges to build a scalable, interactive ad-hoc query system...
In this paper, an efficient image enhancement method based on Retinex and lightness decomposition is proposed, which enhances details and preserves the naturalness simultaneously. The quality of an enhanced image is determined by two factors, details and naturalness. Accordingly, the lightness is proposed to be decomposed into reflex lightness and ambience illumination. The reflex lightness is utilized...
Nowadays, New Blind graphic become more and more important for the blind because graphic contains more information than words. As a new Braille printing tool, New Braille Printer (NBP) has overcome many shortcomings of traditional Braille printer. Unfortunately, the NBP can't print graphic at the present. Thus, in this paper, a graphic printing method for NBP has been introduced that zooming-edge...
Virus signature library is key factor for performance of anti-virus programs considering accuracy and scanning speed. To ensure coverage of various emerging viruses, the scale of signature library grows larger and the consequence is lower efficiency because of the need of matching against more signatures. This paper's target is to decrease the signature mapping cost by optimizing signature library...
The coastal acoustic tomography (CAT) experiment was successfully carried out during September 6 to 9, 2009 in the Sanmen Bay near the Taizhou city, China. Seven sets of CAT systems were set up around the bay for mapping the tidal currents at 3-min interval. The 5 kHz sound, phase-modulated by the 10th order M sequence was transmitted from the broadband transducer. The M sequences with different codes...
To achieve the production information management of the coning, drawing and twisting workshops, and promote a good and fast development of the textile enterprise, a multi-agent production monitoring and control system based on C/S mode is developed, through analyzing the actual requirements of the workshops, where the communication of the single-port-multi-protocol and a multi-thread data collection...
A manufacturing execution system oriented to spinning workshop is developed to analyze the production characteristics and management levels of spinning workshop in the textile enterprises. System structure, data processing and main functions are designed according to the practical requirements. Management principles of MES, ERP, as well as device control systempsilas correlations are elaborated. We...
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