The modeling of attraction characteristics regarding passenger flow in urban rail transit network based on field theory

<div><p>Aimed at the complicated problems of attraction characteristics regarding passenger flow in urban rail transit network, the concept of the gravity field of passenger flow is proposed in this paper. We establish the computation methods of field strength and potential energy to reveal the potential attraction relationship among stations from the perspective of the collection and distribution of passenger flow and the topology of network. As for the computation methods of field strength, an optimum path concept is proposed to define betweenness centrality parameter. Regarding the computation of potential energy, Compound Simpson’s Rule Formula is applied to get a solution to the function. Taking No. 10 Beijing Subway as a practical example, an analysis of simulation and verification is conducted, and the results shows in the following ways. Firstly, the bigger field strength value between two stations is, the stronger passenger flow attraction is, and the greater probability of the formation of the largest passenger flow of section is. Secondly, there is the greatest passenger flow volume and circulation capacity between two zones of high potential energy.</p></div

The pattern of topological structure of the URT network.

<p>The pattern of topological structure of the URT network.</p

The verification method of the optimum path of passenger flow.

<p>The verification method of the optimum path of passenger flow.</p

The contour lines of positive field strength of the source points regarding all stations of No. 10 Line of Beijing subway.

<p>The contour lines of positive field strength of the source points regarding all stations of No. 10 Line of Beijing subway.</p

Interaction between Antibacterial Peptide Apep10 and <i>Escherichia coli</i> Membrane Lipids Evaluated Using Liposome as Pseudo-Stationary Phase - Fig 1

<p>Electropherograms of Apep10 and acetone in the running buffer with various concentrations of (A) the <i>E</i>.<i>coli</i> membrane lipid liposome and (B) the mixed phospholipids liposome at 303 K. The liposome concentrations (mg/ml) were: Ⅰ, 0; Ⅱ, 0.1; Ⅲ, 0.2; Ⅳ, 0.4; Ⅴ, 0.8; Ⅵ, 1.2; Ⅶ, 1.6. The electrophoresis conditions used were as follows: injection, 0.8 psi for 6 s; separation voltage, 25 kV; detection, UV detection at 196 nm; and capillary, 65 cm × 75 μm inner diameter. Peaks (a) and (b) were Apep10 and acetone, respectively.</p

The contour lines of negative field strength of the gathering points regarding all stations of No. 10 Line of Beijing subway.

<p>The contour lines of negative field strength of the gathering points regarding all stations of No. 10 Line of Beijing subway.</p

The interpretation of the source point and the gathering point.

<p>The interpretation of the source point and the gathering point.</p

The contour lines of potential energy with all stations of No. 10 Line of Beijing subway as the source points.

<p>The contour lines of potential energy with all stations of No. 10 Line of Beijing subway as the source points.</p

The diagram of the calculation of the potential energy.

<p>The diagram of the calculation of the potential energy.</p

The data of passenger flow of Line 10 of Beijing subway.

<p>The data of passenger flow of Line 10 of Beijing subway.</p