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Reducing Line Loss01:18

Reducing Line Loss

151
In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss...
151
Singularity Functions for Shear01:26

Singularity Functions for Shear

131
In structural analysis, singularity functions are crucial in simplifying the representation of shear forces in beams under discontinuous loading. These functions describe discontinuous  variations in shear force across a beam with varying loads by using a single mathematical expression, regardless of the complexity of the loading conditions. The singularity functions are derived from creating a free-body diagram of the beam and then making conceptual cuts at specific points to examine the...
131
Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving01:29

Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving

53
Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
53
Compacting Factor test01:22

Compacting Factor test

143
The compacting factor test is a method used to assess the workability of concrete. It is  especially suitable for concrete mixes containing aggregates up to one and a half inches in size. This test involves specialized equipment consisting of two truncated cone-shaped hoppers and a cylinder, all with polished interior surfaces to minimize friction.
The procedure begins by placing concrete into the upper hopper without any compaction. Once filled, the bottom door of this hopper is opened,...
143
Survival Tree01:19

Survival Tree

84
Survival trees are a non-parametric method used in survival analysis to model the relationship between a set of covariates and the time until an event of interest occurs, often referred to as the "time-to-event" or "survival time." This method is particularly useful when dealing with censored data, where the event has not occurred for some individuals by the end of the study period, or when the exact time of the event is unknown.
 Building a Survival Tree
Constructing a...
84
Maxwell-Boltzmann Distribution: Problem Solving01:20

Maxwell-Boltzmann Distribution: Problem Solving

1.5K
Individual molecules in a gas move in random directions, but a gas containing numerous molecules has a predictable distribution of molecular speeds, which is known as the Maxwell-Boltzmann distribution, f(v).
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
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相关实验视频

Updated: Jun 28, 2025

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

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使用非线性运行时间趋势的秘密密钥4优化算法 (SK4OA) 保护云数据.

Twum Frimpong1, James Benjamin Hayfron Acquah1,2, Yaw Marfo Missah1,2

  • 1Department of Computer Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.

PloS one
|April 16, 2024
PubMed
概括

一个新的安全钥匙4优化算法 (SK4OA) 提供了更快,不可预测的云数据安全性. 它在执行时间和带宽效率方面优于RC4,Salsa20和Chacha20等传统方法,可处理大量数据.

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科学领域:

  • 计算机科学 计算机科学
  • 网络安全 网络安全
  • 云计算 云计算 云计算 云计算

背景情况:

  • 云计算提供了诸如节省成本和资源共享等好处.
  • 云中的数据安全是一个重大问题.
  • 云安全现有的加密方法具有线性,长时间的执行时间.

研究的目的:

  • 为增强云数据安全引入一种新的安全钥匙4优化算法 (SK4OA).
  • 解决当前加密解决方案中线性执行时间的局限性.
  • 开发一种非线性运行时算法,以实现高效的数据传输和安全性.

主要方法:

  • 提出了具有非线性运行时间的安全密钥4优化算法 (SK4OA).
  • 评估了SK4OA的性能,使用Kaggle的数据集,数据大小各不相同 (3KB到16KB).
  • 进行实证分析,将SK4OA与RC4,Salsa20和Chacha20进行比较,以加密时间,解密时间,吞吐量和内存利用.

主要成果:

  • 在16KB的数据大小下,SK4OA显示了最低的平均非线性运行时间 (5.545±2.785).
  • SK4OA的标准偏差更大,表明执行时间不可预测,有利于安全.
  • 对比分析显示,SK4OA在特定指标上比RC4,Salsa20和Chacha20更高的效率.

结论:

  • 与现有的方法相比,SK4OA为云数据保护提供了更有效,更安全的解决方案.
  • SK4OA 的非线性运行时间和不可预测的执行,增强了对像 brute force 这样的安全攻击的抵抗力.
  • SK4OA能够以最小的带宽传输大量数据,使其适合云环境.