通过开发的非洲优化算法-埃尔曼神经网络预测自压缩混凝土的压力强度
Shaoqiang Guo1, Honggang Kou2, Yuzhang Bi3
1Civil Engineering College of Xijing University, Xi'an, 710000, Shaanxi, China.
Scientific reports
|August 29, 2024
概括
预测混凝土的压力强度是一个挑战. 这项研究使用了开发的非洲优化算法 (DAVOA) -Elman神经网络 (ENN) 以更多的参数来准确预测混凝土强度.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 计算智能是一种计算智能.
背景情况:
- 预测混凝土的压力强度是复杂的,因为有很多影响因素.
- 传统的方法与影响具体行为的各种参数作斗争.
- 人工神经网络 (ANN) 为复杂的工程问题提供先进的建模能力.
研究的目的:
- 评估开发的非洲优化算法 (DAVOA) -埃尔曼神经网络 (ENN) 的性能,用于预测自压缩混凝土的压力强度.
- 在混凝土强度预测中确定ENN输入参数和转移函数的最佳数量.
- 评估DAVOA在优化ENN以实现可靠的混凝土财产预测方面的有效性.
主要方法:
- 使用的埃尔曼神经网络 (ENN) 通过非洲优化算法 (DAVOA) 得到了改进.
- 使用8个输入参数对140个输入参数进行ENN性能比较.
- 确定了ENNs的最佳层间传递函数 (Logsig-Purelin).
主要成果:
- 用DAVOA增强的ENN在预测7天和28天压力强度时表现出最小的平均平方测试误差.
- 洛格西格-普雷林转移函数被证明是预测两种压力强度的最佳方法.
- 与8个参数网络相比,具有140个参数的网络在测试错误减少方面显示出显著的改善 (74.54%为7天,70.44%为28天).
结论:
- DAVOA是一个强大的,时间和成本高效的工具,用于优化ENNs在预测混凝土的压力强度.
- 增加输入参数可以显著提高预测准确度并降低错误率.
- 开发的DAVOA-ENNs提供了一个灵活而准确的解决方案,用于预测具体的行为.
相关概念视频
01:12Non-destructive Tests for Concrete Strength
113
The rebound hammer test, also known as the Schmidt hammer test, is a non-destructive technique for evaluating the hardness of concrete and, indirectly, the strength of concrete. It operates on the principle that the rebound of a spring-driven mass from a concrete surface correlates to the surface's hardness. The device comprises a mass within a tubular housing, a spring mechanism, and a plunger that strikes the concrete. Upon release, the energy imparted to the mass by the spring causes it...
113
01:23Abrasion Resistance of Concrete
114
Abrasion resistance is an essential characteristic of concrete that determines its durability and longevity under various wear conditions. Concrete surfaces are vulnerable to different types of abrasion. For instance, surfaces may wear down due to the constant movement of vehicles or be eroded by solids carried in water, as seen in concrete canal linings. Specific tests are conducted to measure the abrasion resistance of concrete.
One such test is the revolving disc test, where three plates...
One such test is the revolving disc test, where three plates...
114
01:23Measurement of Air Content in Concrete
123
Air content measurement in concrete is critical for ensuring structural integrity and durability of concrete structures, especially in environments prone to severe weather conditions. Accurate air content analysis optimizes concrete's resistance to freeze-thaw cycles and enhances its workability and strength. Several methods are standardized under ASTM guidelines to measure the air content in fresh concrete, each suitable for different concrete types and conditions.
The pressure method,...
The pressure method,...
123
01:20Strength of Cement
127
Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
127
01:28Effects of Air-entrainment in Concrete
81
Air entrainment in concrete significantly enhances the material's durability, especially in environments subjected to freeze-thaw cycles. Introducing small air bubbles into the concrete mix acts as internal voids that accommodate the expansion of water when it freezes, thereby alleviating internal stress and preventing structural cracks. This function is crucial in climates with significant freezing and thawing, as it protects the concrete from repeated stresses that could lead to premature...
81
01:15Fineness of Cement
121
The fineness of cement directly influences the rate of hydration, as the hydration begins at the surface of the cement particles. In addition to hydration, the fineness of cement is vital for various properties of concrete including workability, gypsum requirement, and long-term behavior. The fineness of cement is represented in terms of the specific surface of cement which is typically measured in square meters per kilogram, with several methods available for this determination.
Direct...
Direct...
121