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Related Concept Videos

Distributed Loads01:19

Distributed Loads

600
Distributed loads are a common type of load that engineers and scientists encounter in various practical situations. Distributed loads often refer to a type of load spread over a surface or a structure and can be modeled as continuous force per unit area.
For example, consider a bookshelf filled with books stacked vertically adjacent to each other. The weight of the books is evenly distributed over the length of the shelf. As a result, the pressure at different locations on the surface of the...
600
Distributed Loads: Problem Solving01:21

Distributed Loads: Problem Solving

722
Beams are structural elements commonly employed in engineering applications requiring different load-carrying capacities. The first step in analyzing a beam under a distributed load is to simplify the problem by dividing the load into smaller regions, which allows one to consider each region separately and calculate the magnitude of the equivalent resultant load acting on each portion of the beam. The magnitude of the equivalent resultant load for each region can be determined by calculating...
722
Load-frequency control01:28

Load-frequency control

251
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
251
Relation Between the Distributed Load and Shear01:23

Relation Between the Distributed Load and Shear

766
Understanding the relationship between the distributed load and shear force in structural analysis is crucial for analyzing beams subjected to various loading conditions. Consider the case of a beam experiencing a distributed load, two concentrated loads, and a couple moment.
766
Distribution Reliability and Automation01:25

Distribution Reliability and Automation

153
Distribution reliability in electrical power systems is critical for ensuring an uninterrupted power supply to consumers at minimal cost. According to IEEE Standard Terms, reliability is the probability that a device will function without failure over a specified time period or amount of usage. For electric power distribution, this translates to maintaining continuous power supply and addressing customer concerns over power outages. Several indices, as defined by IEEE Standard 1366-2012, are...
153
Design Consideration01:22

Design Consideration

316
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
316

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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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A security-aware service function chain deployment method for load balance and delay optimization.

Dong Zhai1, Xiangru Meng1, Zhenhua Yu2

  • 1Information and Navigation College, Air Force Engineering University, Xi'an, 710077, China.

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|June 21, 2022
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Summary
This summary is machine-generated.

This study introduces a new method for deploying network functions in virtualized environments, improving security and efficiency. The Security-Aware Service Function Chain (SASFC) method optimizes resource use and reduces delays for better network performance.

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Area of Science:

  • Computer networking
  • Network security
  • Software-defined networking

Background:

  • Network Function Virtualization (NFV) decouples network functions from hardware, but software reliance introduces security vulnerabilities.
  • Existing deployment methods struggle with security demands and strict delay requirements in NFV, leading to inefficient resource use and lower acceptance ratios.
  • Security challenges and transmission delays significantly impact user interests and network performance in NFV environments.

Purpose of the Study:

  • To propose a novel method for consolidating Virtual Network Functions (VNFs) with security and mutual exclusion constraints to optimize resource consumption and reduce transmission delay.
  • To develop a Security-Aware Service Function Chain (SASFC) deployment method that enhances load balancing and minimizes delay in NFV.
  • To improve the efficiency, acceptance ratio, and revenue-to-cost ratio of NFV resource utilization while ensuring security.

Main Methods:

  • Proposed a Security-Constraint and Function-Mutex-Constraint Consolidation (SFMC) method for VNF consolidation.
  • Developed the SASFC deployment method, which identifies candidate server nodes based on resource, capacity, security, and load constraints.
  • Utilized the Viterbi algorithm within SASFC to find optimal paths considering minimum transmission delay and link load constraints, prioritizing VNF security levels.

Main Results:

  • The SASFC method demonstrated more reasonable substrate resource utilization compared to existing methods.
  • Achieved improved acceptance ratios and long-term average revenue-to-cost ratios, with results close to 0.75 and 0.88 respectively for five VNFs.
  • Significantly reduced transmission delay and the proportion of bottleneck nodes, with experimental values of 7.71 and 0.024 respectively.

Conclusions:

  • The proposed SFMC and SASFC methods effectively address security and delay challenges in NFV.
  • SASFC enhances NFV performance by optimizing resource allocation, improving acceptance rates, and reducing latency.
  • Experimental results validate the effectiveness of the SASFC method in improving overall network efficiency and user satisfaction.