Analysis of Road Capacity Based on Traffic Volatility Models

2014 ◽  
Vol 926-930 ◽  
pp. 4077-4080
Author(s):  
Jia Huan Lu
Keyword(s):  
Cross Section ◽  
Traffic Model ◽  
Initial State ◽  
Wave Propagation Velocity ◽  
Dynamic Changes ◽  
Road Capacity ◽  
Volatility Models ◽  
Queue Lengths ◽  
Fluctuation Model ◽  
Irrotational Wave

Establishing traffic fluctuation model considering different factors: learning from fluid mechanics, in the initial state on the basis of the length of the team, apply irrotational wave that characterize the condition of vehicle’s congestion and ease to characterize the dynamic changes of vehicle queue lengths and to build volatility traffic model. From the perspective of factors that the effect wave propagation velocity, research the model into two conditions: whether the new vehicles and the originals can meet at the upstream of the cross section of the accident or not. In the meantime, in each situation, interception intersection’s signal cycle as calculation period to simulate cycle data towards time.

scholarly journals Spin-one dark matter and gamma ray signals from the galactic center

2020 ◽  
Vol 2020 (8) ◽  
Author(s):  
H. Hernández-Arellano ◽  
M. Napsuciale ◽  
S. Rodríguez
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Gamma Ray ◽  
Galactic Center ◽  
Photon Emission ◽  
Scalar Coupling ◽  
Initial State ◽  
Internal Bremsstrahlung ◽  
Resonance Effects ◽  
State Radiation

Abstract In this work we study the possibility that the gamma ray excess (GRE) at the Milky Way galactic center come from the annihilation of dark matter with a (1, 0) ⊕ (0, 1) space-time structure (spin-one dark matter, SODM). We calculate the production of prompt photons from initial state radiation, internal bremsstrahlung, final state radiation including the emission from the decay products of the μ, τ or hadronization of quarks. Next we study the delayed photon emission from the inverse Compton scattering (ICS) of electrons (produced directly or in the prompt decay of μ, τ leptons or in the hadronization of quarks produced in the annihilation of SODM) with the cosmic microwave background or starlight. All these mechanisms yield significant contributions only for Higgs resonant exchange, i.e. for M ≈ MH /2, and the results depend on the Higgs scalar coupling to SODM, gs. The dominant mechanism at the GRE bump is the prompt photon production in the hadronization of b quarks produced in $$ \overline{D}D\to \overline{b}b $$ D ¯ D → b ¯ b , whereas the delayed photon emission from the ICS of electrons coming from the hadronization of b quarks produced in the same reaction dominates at low energies (ω < 0.3 GeV ) and prompt photons from c and τ , as well as from internal bremsstrahlung, yield competitive contributions at the end point of the spectrum (ω ≥ 30 GeV ). Taking into account all these contributions, our results for photons produced in the annihilation of SODM are in good agreement with the GRE data for gs ∈ [0.98, 1.01] × 10−3 and M ∈ [62.470, 62.505] GeV . We study the consistency of the corresponding results for the dark matter relic density, the spin-independent dark matter-nucleon cross-section σp and the cross section for the annihilation of dark matter into $$ \overline{b}b $$ b ¯ b , τ+τ−, μ+μ− and γγ, taking into account the Higgs resonance effects, finding consistent results in all cases.

scholarly journals Measurement of the e+e−→π+π−π0π0 cross section using initial-state radiation at BABAR

2017 ◽  
Vol 96 (9) ◽  
Author(s):  
J. P. Lees ◽  
V. Poireau ◽  
V. Tisserand ◽  
E. Grauges ◽  
A. Palano ◽  
...  
Keyword(s):  
Cross Section ◽  
Initial State Radiation ◽  
Initial State ◽  
State Radiation

scholarly journals Open charm studies at Belle

2019 ◽  
Vol 212 ◽  
pp. 09003
Author(s):  
Valentina Zhukova
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Open Charm ◽  
Mass Energy ◽  
Initial State ◽  
Belle Detector ◽  
Section Measurement ◽  
Angular Analysis ◽  
State Radiation ◽  
Radiation Technique

We present the new results of measurements of the exlusive cross sections of the e+ e− annihilation to charmed meson pairs as a function of √ ceneter-of-mass energy from the open charm threashold up to $ \sqrt s = {\rm{6 GeV}} $ using initial state radiation technique. The analysis is based on a data sample collected by the Belle detector with an integrated luminosity of 951 fb−1. The accuracy of the cross section measurement is increased by a factor of 2 in comparison with the first Belle study. We have performed the first angular analysis + −→ D*± D*∓ of the $ {e^{\rm{ + }}}{e^ - } \to {D^{* \pm }}{D^{* \mp }} $ process and decomposed this exclusive cross section into three components corresponding to the different D* helicities.

City Occupancy and Road Capacity Model

2014 ◽  
Vol 1044-1045 ◽  
pp. 1538-1540 ◽  
Author(s):  
Yi Lin Fan ◽  
Bei Chen Cheng ◽  
Li Li Cao ◽  
Kun Cheng Huang
Keyword(s):  
Cross Section ◽  
Road Traffic ◽  
The Road ◽  
Road Capacity ◽  
Traffic Capacity ◽  
Capacity Model ◽  
The Cross ◽  
Definition Of ◽  
The Impact ◽  
Accident Case

In this paper, we study the impact of city driveway occupancy on the urban road traffic capacity. Through the analysis of the scene of an accident case, we gained the vehicle statistics within a cross section in unit time and then did calculation and simulation. The work is concluded as a reasonable model of vehicle queue relationship evaluation.First, on the base of the definition of traffic capacity, statistics of the cars in the cross section before the accident, during the accident and after the accident have been respectively acquired in unit time (1 min). Then we employ Matlab to do the interpolation fitting, drawing the change of actual capacity of the road from the beginning time of an accident to the time when traffic resumes. The work comes to a conclusion that the change of the capacity at the cross section has a pattern of periodic fluctuation.

Data Processing in Dynamic Traffic Capacity of Urban Road Based on Squatted Lane

2014 ◽  
Vol 910 ◽  
pp. 415-418
Author(s):  
He Quan Zhang
Keyword(s):  
Cross Section ◽  
Traffic Accidents ◽  
Sampling Point ◽  
Dynamic Traffic ◽  
Traffic Lights ◽  
Road Capacity ◽  
Traffic Capacity ◽  
Capacity Model ◽  
The Cross ◽  
Pass Through

With more and more cars, rates of traffic accidents are also increasing. When there is an accident, lanes will be squatted. So the traffic capacity will be influenced. I have established a dynamic traffic capacity model based on mechanical mechanics that basic road capacity is influenced by instantaneous traffic. First of all, considering the phrase cycle of traffic lights of upstream crossing, we will set a sampling point per 60 seconds to count the number of cars that pass through the cross-section of accident in this video, and then calculate the traffic of every sampling point. Secondly, we will analyze actual traffic capacity by the line chart of traffic of cross-section and time that we evacuate queuing vehicles within 120 meters. By analyzing, we find that the actual traffic capacity at the cross-section of accident emerges fluctuation status. Based on the traditional model of road capacity and mechanical mechanics, by improving compensation factors, we can establish the model of dynamic traffic capacity at accident point.

scholarly journals Stretching of a cylindrical rod of variable cross-section in the theory of small elastic-plastic

2020 ◽  
pp. 78-81
Author(s):  
Николай Ильич Петров
Keyword(s):  
Cross Section ◽  
Axisymmetric Problem ◽  
Variable Cross Section ◽  
Variable Cross ◽  
Initial State ◽  
Plastic Deformations ◽  
Linearized Equations ◽  
Elastic Plastic

В работе рассматривается растяжение бесконечно длинного цилиндрического стержня переменного сечения. Используются результаты решения линеаризированных уравнений теории малых упругопластических деформаций [1-7] в случае осесимметричной задачи. Предполагается, что в начальном состоянии имеет место простое растяжение. We considers the stretching of an infinitely long cylindrical rod of variable cross-section. The results of solving the linearized equations of the theory of small elastic-plastic deformations [1-7] in the case of an axisymmetric problem are used. It is assumed that a simple stretch occurs in the initial state.

scholarly journals CONSOLIDATION ZONES FEATURES FORMATION OF A GROUND AROUND SQUARE SHAPED PILES

2018 ◽  
Vol 1 (50) ◽  
pp. 167-173
Author(s):  
O. V. Malyshev
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Analytical Method ◽  
Lateral Surface ◽  
Analytical Methods ◽  
Rational Design ◽  
Initial State ◽  
Compaction Zone ◽  
Analytical Expressions ◽  
Efficiency And Reliability

Necessity to resolve the problem of concerning the analytical dimensions definition and constructing forms of compacted zones of ground around the lateral surface of square cross section pile in normal to pile axis direction are shown in this article. Various analytical methods of ground compacted zones radius determination around cylindrical elements driven into the ground considering its initial state were analyzed. Graph-analytical method of ground compaction zones construction around square cross-section piles was developed. Efficiency of the developed methodology and analytical expressions using possibility to determine the radius of compaction zone of a ground around the driven or jacked-in elements is confirmed by comparing obtained solutions with the experimental data. The developed methodology allows increasing the efficiency and reliability of piles and pile foundations use due to their rational design.

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