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相关概念视频

Relation Between Tensile Strength and Compressive Strength of Concrete01:30

Relation Between Tensile Strength and Compressive Strength of Concrete

742
Concrete is a fundamental building material, and understanding its strengths is crucial for construction projects. The relationship between its tensile and compressive strengths is intricate, showing that while these strengths are related, they do not increase at the same rate. Tensile strength's growth is slower and is affected by various factors such as the methods used for testing, the size and shape of the specimen, the texture of the aggregate used, and the moisture content of the...
742
Behavior of Concrete Under Compressive Load01:23

Behavior of Concrete Under Compressive Load

689
Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
689
Non-destructive Tests for Concrete Strength01:12

Non-destructive Tests for Concrete Strength

673
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...
673
Dynamic Modulus of Elasticity of Concrete01:16

Dynamic Modulus of Elasticity of Concrete

1.1K
The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by a...
1.1K
Tensile Strength Considerations of Concrete01:16

Tensile Strength Considerations of Concrete

632
Considering the tensile strength of concrete involves recognizing that the theoretical strength of cement paste can be up to a thousand times higher than what is observed in practical applications. This significant discrepancy is largely attributed to the presence of microscopic cracks within the concrete. These cracks tend to amplify stress at their tips when a load is applied, a phenomenon explained by Griffith's theory of brittle fracture.
The dimensions and shape of a concrete specimen...
632
Strength of Cement01:20

Strength of Cement

669
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...
669

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相关实验视频

Updated: Feb 28, 2026

Author Spotlight: Efficient Image Recognition Using Directional Gradient Histogram Technique and Support Vector Machines
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Author Spotlight: Efficient Image Recognition Using Directional Gradient Histogram Technique and Support Vector Machines

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使用优化深度学习和大型语言模型预测混凝土的压力强度.

Safaa Zaman1, Marwa M Eid2, Ebrahim A Mattar3

  • 1Information Sciences Department, College of Life Sciences, Kuwait University, Kuwait City, Kuwait.

Scientific reports
|February 26, 2026
PubMed
概括
此摘要是机器生成的。

本研究引入了一种新的AI框架,将iHow优化算法 (iHowOA) 和空间时间图卷积网络 (STGCN) 结合起来,以准确预测混凝土的压力强度,改进可持续的建筑材料设计.

关键词:
混凝土的压力强度是什么法学士 (LLM) 是一个专业.超听证学是一种超听证学.在STGCNCN中.可持续建筑材料 可持续建筑材料

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Augmenting Large Language Models via Vector Embeddings to Improve Domain-Specific Responsiveness
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相关实验视频

Last Updated: Feb 28, 2026

Author Spotlight: Efficient Image Recognition Using Directional Gradient Histogram Technique and Support Vector Machines
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Author Spotlight: Efficient Image Recognition Using Directional Gradient Histogram Technique and Support Vector Machines

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Augmenting Large Language Models via Vector Embeddings to Improve Domain-Specific Responsiveness
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科学领域:

  • 材料科学 材料科学 材料科学
  • 土木工程 土木工程是指土木工程.
  • 人工智能的人工智能

背景情况:

  • 预测混凝土的压力强度对于可持续建筑至关重要.
  • 混合物成分,添加剂和固化条件之间的复杂相互作用带来了挑战.
  • 现有的方法经常与这些相互作用的非线性性质作斗争.

研究的目的:

  • 开发一个先进的混合人工智能框架,用于增强混凝土压力强度预测.
  • 提高建筑材料预测模型的准确性和稳定性.
  • 为材料科学应用利用新的优化和深度学习技术.

主要方法:

  • 将iHow优化算法 (iHowOA) 与时空图形卷积网络 (STGCN) 的集成.
  • 使用大型语言模型 (LLM) 进行数据预处理,包括语义验证和特征协调.
  • 使用iHowOA的自适应性决策和知识获取能力优化STGCN架构.
  • 基于图形的建模,以捕捉空间依赖性和时间力量演变.

主要成果:

  • 拟议的iHowOA-STGCN框架与其他十个元启发式优化器相比,显示出优异的预测性能.
  • 在公开数据集上实现了较低的预测错误和更高的相关系数.
  • 确定了水泥特性,与年龄相关的强度增强和物理化学相互作用之间的关键关系.

结论:

  • iHowOA-STGCN框架提供了一个有前途的数据驱动决策支持工具,用于具体的强度预测.
  • 基于LLM的预处理提高了数据质量和模型输入的稳定性.
  • 建议对各种数据集进行进一步的验证,以确认在现实场景中可概括性和实际适用性.