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Method for optimizing phase difference between upstream and downstream intersection on high saturation section

An optimization method technology between intersections, which is applied in the field of phase difference optimization between upstream and downstream intersections on high-saturation road sections

Active Publication Date: 2019-04-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For road sections with high saturation, periodic long-distance queuing is a problem that urban traffic managers and actual traffic participants are more eager to solve than the bandwidth and delay of green wave belts. The existing research on queuing length mainly focuses on How to use advanced traffic detection technology to accurately estimate the queuing length of road sections, there are few studies that consider the influence of queuing length and take the least impact of queuing length as the goal of arterial coordination and optimization

Method used

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  • Method for optimizing phase difference between upstream and downstream intersection on high saturation section
  • Method for optimizing phase difference between upstream and downstream intersection on high saturation section
  • Method for optimizing phase difference between upstream and downstream intersection on high saturation section

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Embodiment 1

[0061] Such as figure 1 , image 3 as well as Figure 4 As shown in , a phase difference optimization method between upstream and downstream intersections on high-saturation road sections includes the following steps:

[0062] Step S1: road section description and system establishment, which specifically includes the following steps:

[0063] Step S101: road segment geometric conditions and upstream and downstream phase settings, there is an adjacent intersection I a , I b , Section I a I b The length is L, the common signal period is C, all are set to three phases, and the phase sequence is that phase 1 goes straight north-south, phase 2 turns north-south to the left, and phase 3 passes east-west. Indicates intersection I a The duration of each phase, with Indicates intersection I b The duration of each phase, regardless of the yellow light time and full red time, that is Downstream Intersection I b Phase 1 Relative Upstream Intersection I a The phase differen...

Embodiment 2

[0095] This embodiment takes figure 2 Shown is that simulation section establishes simulation and verifies above-mentioned model, comprises 2 intersections (I a , I b ) and 1 section I a I b , Section I a I b The length is L, the common signal period is C, all are set to three phases, and the phase sequence is that phase 1 goes straight north-south, phase 2 turns north-south to the left, and phase 3 passes east-west. Indicates intersection I a The duration of each phase, with Indicates intersection I b The duration of each phase, regardless of the yellow light time and full red time, that is Downstream Intersection I b Phase 1 Relative Upstream Intersection I a The phase difference of the red light of phase 1 is Upstream Intersection I a Phase 1 Relative Upstream Intersection I b The red light phase difference of phase 1 can be The phase difference referred to below is the phase difference of the downlink red light Road network parameter input informati...

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Abstract

The invention relates to a visual online testing system for a temperature field of combustor components of a ship low speed machine. The visual online testing system comprises a sensing test piece ofthe temperature field of the combustor component, a signal integrated acquisition device, and a visual online testing module. The sensing test piece comprises a piston, a cylinder head, a cylinder liner, and an exhaust valve temperature field sensing test piece. The signal integrated acquisition device comprises an integrated acquisition device of the wireless and cabled signals of the piston, thecylinder head, the cylinder liner, and the exhaust valve. The visual online testing module creates a visual three dimensional model of the components and uses a spatial interpolation algorithm to realize online display of the combustor components in different ways. According to the visual online testing system for the temperature field of the combustor components of the ship low speed machine, the temperature field distribution function in the operation of the piston, the cylinder head, the cylinder liner and the exhaust valve of the low speed machine is visually displayed; the integrality and correlation of the display of the combustor component of the low speed machine are increased; the efficiency of analyzing test data of the temperature field is improved; and an important test platform is provided for research development of the low speed machine, pattern recognition tests and thermal load analysis of the combustor component in upgrade reconstruction.

Description

technical field [0001] The invention relates to the field of intelligent transportation, and more specifically, to a method for optimizing phase difference between upstream and downstream intersections of high-saturation road sections. Background technique [0002] During the peak traffic period, when the flow of urban road sections tends to be saturated, periodic long-distance queuing often occurs, and even overflow occurs, causing intersections to be paralyzed and seriously affecting traffic safety. Signal coordination control plays a vital role in arterial traffic control and congestion relief. Therefore, many scholars have carried out in-depth research on arterial coordination optimization, and their directions are mainly divided into two categories: [0003] One is to optimize the widest green wave band, by establishing a mathematical model between the green wave bandwidth and the signal period, phase difference, phase sequence mode, green signal ratio, driving speed an...

Claims

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Application Information

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IPC IPC(8): G08G1/00G08G1/01G08G1/081G06Q10/04
CPCG06Q10/047G08G1/0104G08G1/0125G08G1/081G08G1/22
Inventor 李鑫林晓琼马莹莹首艳芳徐建闽
Owner SOUTH CHINA UNIV OF TECH
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