相关实验视频
Updated: Jul 5, 2025

11:59
High-speed Particle Image Velocimetry Near Surfaces
Published on: June 24, 2013
33.1K
基于沃罗诺伊拓学的对对相关函数
Vasco M Worlitzer1, Gil Ariel1, Emanuel A Lazar1
1Department of Mathematics, Bar Ilan University, Ramat Gan 5290002, Israel.
Physical review. E
|January 20, 2024
概括
这项研究引入了一个离散的Voronoi对相关函数 (PCF),以揭示标准平均PCF遗漏的局部粒子排列. 这种新方法增强了各种物理系统中的结构分析.
科学领域:
- 统计力学 统计力学
- 材料科学 材料科学 材料科学
- 复杂的系统复杂的系统.
背景情况:
- 双相关函数 (PCF) 是分析粒子系统的标准工具.
- 然而,PCF的平均性质可能会掩盖关键的当地结构细节.
- 这些隐藏的细节可以显著影响宏观系统的特性.
研究的目的:
- 开发PCF的一个离散版本,以捕捉本地拓配置.
- 克服传统的平均PCF在辨别微妙的结构差异方面的局限性.
- 为分析各种物理系统中的粒子排列提供一种更灵敏的方法.
主要方法:
- 使用Voronoi拓来定义局部粒子间关系.
- 开发基于沃罗诺伊模块的离散对相关函数.
- 应用Voronoi PCF来分析晶体,超均和活性系统.
主要成果:
- 沃罗诺伊PCF有效地突出了当地的粒子间拓结构.
- 在晶体和超均系统中对结构差异表现出敏感性.
- 揭示了活跃系统中的集群和巨大的数量波动.
结论:
- 离散的VoronoiPCF为详细的结构分析提供了一个强大的传统PCF替代方案.
- 这种方法通过揭示隐藏的局部秩序来增强对复杂物理系统的理解.
- 沃罗诺伊PCF适用于广泛的模拟和实验数据.
相关概念视频
Coordination Number and Geometry
15.8K
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
15.8K
Dot Product
340
The dot product is an essential concept in mathematics and physics.
In engineering, the dot product of any two vectors is the product of the magnitudes of the vectors and the cosine of the angle between them. It is denoted by a dot symbol between the two vectors.
Consider a vehicle pulling an object along the ground using a rope. If the rope makes an angle with the horizontal axis, the work done can be calculated using the dot product of the force applied and the object's displacement.
The dot...
In engineering, the dot product of any two vectors is the product of the magnitudes of the vectors and the cosine of the angle between them. It is denoted by a dot symbol between the two vectors.
Consider a vehicle pulling an object along the ground using a rope. If the rope makes an angle with the horizontal axis, the work done can be calculated using the dot product of the force applied and the object's displacement.
The dot...
340
Correlation
11.7K
In statistics, two variables are said to be correlated if the values of one variable are associated with the other variable. Depending on the relationship between two variables, correlation can be of three types– positive correlation, negative correlation, and zero correlation.
Two variables, for example, a and b, are said to be positively correlated if both variables move in the same direction. In other words, a positive correlation exists between two variables, a and b, if:
Two variables, for example, a and b, are said to be positively correlated if both variables move in the same direction. In other words, a positive correlation exists between two variables, a and b, if:
11.7K
Coefficient of Correlation
6.1K
The correlation coefficient, r, developed by Karl Pearson in the early 1900s, is numerical and provides a measure of strength and direction of the linear association between the independent variable x and the dependent variable y.
If you suspect a linear relationship between x and y, then r can measure how strong the linear relationship is.
What the VALUE of r tells us:
The value of r is always between –1 and +1: –1 ≤ r ≤ 1.
The size of the correlation r indicates the...
If you suspect a linear relationship between x and y, then r can measure how strong the linear relationship is.
What the VALUE of r tells us:
The value of r is always between –1 and +1: –1 ≤ r ≤ 1.
The size of the correlation r indicates the...
6.1K
Vector Algebra: Graphical Method
12.2K
Vectors can be multiplied by scalars, added to other vectors, or subtracted from other vectors. The vector sum of two (or more) vectors is called the resultant vector or, for short, the resultant.
We use the laws of geometry to construct resultant vectors, followed by trigonometry to find vector magnitudes and directions. For a geometric construction of the sum of two vectors in a plane, we follow the parallelogram rule. Suppose two vectors are at arbitrary positions. Translate either one of...
We use the laws of geometry to construct resultant vectors, followed by trigonometry to find vector magnitudes and directions. For a geometric construction of the sum of two vectors in a plane, we follow the parallelogram rule. Suppose two vectors are at arbitrary positions. Translate either one of...
12.2K
Area Computation by the Alternative Coordinate Method
57
The alternative coordinate method, also known as the Shoelace Formula, is a technique for determining the area of a traverse using Cartesian coordinates. This method relies on the sequential arrangement of x and y coordinates for each point of the shape, ensuring accuracy and ease of application.In this approach, each corner's x and y coordinates are listed as fractions, with the x-coordinate as the numerator and the y-coordinate as the denominator. These coordinates are arranged sequentially...
57

