scholarly journals Detection of Salient Crowd Motion Based on Repulsive Force Network and Direction Entropy

Entropy ◽  
2019 ◽  
Vol 21 (6) ◽  
pp. 608 ◽  
Author(s):  
Xuguang Zhang ◽  
Dujun Lin ◽  
Juan Zheng ◽  
Xianghong Tang ◽  
Yinfeng Fang ◽  
...  
Keyword(s):  
Velocity Vector ◽  
Interaction Force ◽  
Repulsive Force ◽  
Feature Parameter ◽  
Salient Regions ◽  
Crowd Motion ◽  
Vector Direction ◽  
Crowd Movement ◽  
The Relationship ◽  
Force Network

This paper proposes a method for salient crowd motion detection based on direction entropy and a repulsive force network. This work focuses on how to effectively detect salient regions in crowd movement through calculating the crowd vector field and constructing the weighted network using the repulsive force. The interaction force between two particles calculated by the repulsive force formula is used to determine the relationship between these two particles. The network node strength is used as a feature parameter to construct a two-dimensional feature matrix. Furthermore, the entropy of the velocity vector direction is calculated to describe the instability of the crowd movement. Finally, the feature matrix of the repulsive force network and direction entropy are integrated together to detect the salient crowd motion. Experimental results and comparison show that the proposed method can efficiently detect the salient crowd motion.

scholarly journals Gravity to Electricity as Quantum

2020 ◽  
Author(s):  
Jong-hoon Lee
Keyword(s):  
Quantum Mechanics ◽  
Magnetic Fields ◽  
Potential Energy ◽  
Equilibrium State ◽  
Opposite Direction ◽  
Repulsive Force ◽  
The Earth ◽  
Gravity And Magnetic ◽  
The Relationship ◽  
Renormalization Theory

When gravity exists in magnetic fields, gravity interacts with magnetic fields to generate electricity Earth direction or opposite direction. In this experiment, we demonstrate it and explain why need the renormalization theory. And in this experimental model, the relationship between electricity, voltage and time were redefined through the analysis of data for 0.1 second. Voltage and time are in a 1: 1 matching relationship. The voltage can be recorded on the x-axis and time on the y-axis. It explains two expressions of the Schrödinger equation. According to these experiments, the electric potential energy generated in gravity and magnetic fields is not reflected in quantum mechanics. The renormalization theory has modified the quantum mechanics in four-dimensional systems. If gravity and electromagnetic force are particles, they are in a symmetrical balance of supersymmetric particles in the gravity generator. Gravity generator was voltage (0) and electricity (0) in Excel 6380 data of experiment F4 when it was in equilibrium state in the direction of the Earth by gravity force and in the opposite direction by the magnetic repulsive force.

scholarly journals Crowd Event Perception Based on Spatiotemporal Weber Field

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Zhou Su ◽  
Hua Wei ◽  
Sha Wei
Keyword(s):  
Large Scale ◽  
Latent Dirichlet Allocation ◽  
Interaction Force ◽  
Motion Modeling ◽  
Allocation Model ◽  
Motion Patterns ◽  
Crowd Management ◽  
Latent Dirichlet Allocation Model ◽  
Spatiotemporal Signal ◽  
Crowd Motion

Over the past decade, a wide attention has been paid to the crowd control and management in intelligent video surveillance area. Among the tasks of automatic video-based crowd management, crowd motion modeling is recognized as one of the most critical components, since it lays a crucial foundation for numerous subsequent analyses. However, it still encounters many unsolved challenges due to occlusions among pedestrians, complicated motion patterns in crowded scenarios, and so forth. Addressing these issues, we propose a novel spatiotemporal Weber field, which integrates both appearance characteristics and stimulus of crowd motion patterns, to recognize the large-scale crowd event. On the one hand, crowd motion is recognized as variations of spatiotemporal signal, and we then measure the variation based on Weber law. The result is referred to as spatiotemporal Weber variation feature. On the other hand, motivated by the achievements in crowd dynamics that crowd motion has a close relationship with interaction force, we propose a spatiotemporal Weber force feature to exploit the stimulus of crowd behaviors. Finally, we utilize the latent Dirichlet allocation model to establish the relationship between crowd events and crowd motion patterns. Experiments on PETS2009 and UMN databases demonstrate that our proposed method outperforms the previous methods for the large-scale crowd behavior perception.

Study of Elastohydrodynamic Film Shape Under Different Directions of Velocity Vectors

2011 ◽  
Author(s):  
Milan Omasta ◽  
Ivan Krupka ◽  
Martin Hartl
Keyword(s):  
Thin Film ◽  
Experimental Study ◽  
Film Thickness ◽  
Velocity Vector ◽  
Point Contact ◽  
Sliding Velocity ◽  
Hypoid Gears ◽  
Entrainment Velocity ◽  
Vector Direction

Some machines elements such as hypoid gears and Wildhaber-Novikov gears works under conditions where the surface velocities are variously oriented, thus the entrainment and sliding velocities act at different directions. The influence of sliding velocity vector direction with respect to entrainment velocity vector has not been sufficiently determined yet. So, the aim of current experimental study is to investigate effect of slide-to-roll ratio and direction of sliding velocity vector with respect to entrainment velocity vector on elastohydrodynamic (EHD) film thickness using thin-film colorimetric interferometry in smooth glass-steel point contact.

scholarly journals The thermal diffusion of radon gas mixtures

1937 ◽  
Vol 161 (904) ◽  
pp. 80-94 ◽  
Keyword(s):  
Thermal Diffusion ◽  
Simple Form ◽  
Large Change ◽  
Gas Mixtures ◽  
Repulsive Force ◽  
Theoretical Treatment ◽  
Radon Gas ◽  
Coefficient Of Viscosity ◽  
The Relationship

A special theoretical treatment of thermal diffusion in mixtures of two gases, in which one component is rare, has been given by Chapman (1929). An interesting result which emerges from this theory is that this phenomenon may produce a large change in the quantity of the rare constituent on the cold and hot sides. Let M 1 be the mass of the molecules of the rare and heavy constituent, M 2 that of the light constituent, and r the ratio of the proportion by volume of the rare constituent on the cold to that on the hot side, after thermal diffusion. When M 2 / M 1 is small, the formulae expressing the relationship between r and s 12 , the repulsive force index between unlike molecules, can be expressed in a simple form. In this case, the experimental value of the ratio, r , together with the coefficient of ordinary diffusion of the two gases and the coefficient of viscosity of the lighter gas, suffices to determine s 12 .

scholarly journals Modelling Unidirectional Crowd Motion in a Corridor with Statistical Characteristics of Pedestrian Movements

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Tan Chen ◽  
Wei Wang ◽  
Yu Tu ◽  
Xuedong Hua
Keyword(s):  
Lattice Gas ◽  
Local Density ◽  
Transition Probability ◽  
Step Length ◽  
Lattice Gas Model ◽  
Statistical Characteristics ◽  
Proposed Model ◽  
Crowd Motion ◽  
The Relationship ◽  
Pedestrian Simulation

Lattice gas model is a kind of mature and convenient pedestrian simulation model. The original lattice gas model adopts discontinuous step length and finite moving directions to simulate crowd motion, which will lead to some unreasonable movements; besides, the transition probability used in this model is often manually designed and lacks the verification of realistic pedestrian trajectories. Based on an open pedestrian trajectory dataset, we first derived the relationship between local density and the distribution of pedestrian movements’ length and then proposed an extended lattice gas model considering the statistical characteristics of pedestrian movements, which extends the concept of transition probability in the original lattice gas model to distribution of pedestrian movements’ length in two perpendicular directions. The proposed model is applied to a scenario which is the same as the experiments of the open dataset, and the numerical results demonstrate that the proposed model can reproduce the fundamental diagrams and the transition probability of the experimental dataset well. This study is helpful to understand the statistical characteristics of pedestrian movements and can improve the applicability and accuracy of the lattice gas model.

Human Capital and Agriculture Performance in Indonesia

2021 ◽  
Vol 3 (1) ◽  
pp. 1-9
Author(s):  
Eny Lestari Widarni ◽  
Keyword(s):  
World Bank ◽  
Agricultural Sector ◽  
Analysis Method ◽  
The World Bank ◽  
The World ◽  
The Future ◽  
Independent Variable ◽  
Vector Direction ◽  
Relationship Of ◽  
The Relationship

This study aims to investigate the vector direction of the relationship between agriculture performance, employment in agriculture, and education in Indonesia. This research uses the vector analysis method. where the dependent variable and the independent variable take turns to see the direction of the relationship of each variable to each other. All data used in this study are sourced from the world bank data. We found that labor absorption in the agricultural sector in Indonesia continues to decline very sharply, it becomes a threat to agriculture performance in the future. Because there is a decline in performance in the future due to labor shortages and it is possible that the agricultural sector will be completely destroyed when there is a shortage of labor in this sector if the interest of the Indonesian youth in the agricultural sector is not invested.

A Novel Synthesis Method for Nonperiodic Function Generation of an RCCC Mechanism

2018 ◽  
Vol 10 (3) ◽  
Author(s):  
Wenrui Liu ◽  
Jianwei Sun ◽  
Bangcheng Zhang ◽  
Jinkui Chu
Keyword(s):  
Synthesis Method ◽  
Normalization Method ◽  
Numerical Examples ◽  
Function Generation ◽  
Novel Synthesis ◽  
Feature Parameter ◽  
Design Requirements ◽  
Mechanism Function ◽  
Relationship Of ◽  
The Relationship

In this paper, the nonperiodic function synthesis of an RCCC mechanism is presented using a wavelet feature parameter (WFP) method. The output function and the sliding displacement of the RCCC mechanism are described by the wavelet approximate and wavelet details. Based on the relationship of wavelet details of the sliding displacement and its scaling, a normalization method for wavelet details of the sliding displacement is presented. The influence of proportional scaling of the linkage lengths is eliminated. An adaptive database is established. The problem of nonperiodic design requirements of RCCC mechanism function synthesis is solved. To demonstrate the feasibility of this method, two numerical examples are proposed. Based on the nonperiodic design requirements, the RCCC mechanisms are designed and simulated using matlab and catia software. The results show that the method proposed is effective for nonperiodic function generation of the RCCC mechanism with multiple positions.

Influence of surface silanol structure and hydration forces on alkoxide-derived silica gel structure

1997 ◽  
Vol 501 ◽  
Author(s):  
H. Kamiya ◽  
M. Yoshida ◽  
M. Mitsui
Keyword(s):  
Solid Surface ◽  
Mercury Porosimetry ◽  
Water Layer ◽  
Interaction Force ◽  
Repulsive Force ◽  
Solid Surfaces ◽  
Silica Gels ◽  
Gel Structure ◽  
Hydration Force ◽  
Hydrogen Bonded

ABSTRACTThe effects of the surface silanol structure and interaction force between solid surfaces in water on the gel structure using acid catalyzed hydrolysis alkoxide-derived silica gels with various preparation conditions. The present study focused on the amount of catalysts and H2O/TEOS mole ratios. Surface silanol structure, interaction between solid surfaces and the structure in dried-gels were determined by a FT-nIR, FT-IR, Atomic Force Microscope (AFM) and a mercury porosimetry, respectively. As results, when a relatively low H2O/TEOS mole ratio ( from 4 to 40) was used, surface silanol was almost hydrogen bonded silanol, and isolated silanol disappeared. Since this hydrogen-bonded silanol formed a hydrogen bonded water layer on silica surface, short-range additional hydration force (less than 2 nm) appeared between solid surface and the tip of AFM. When H2O/TEOS mole ratio increase in the range from 20 to 40, the surface density of isolated silanol increased and that of residual Si-OC2H5 decreased. Relatively long-range additional repulsive force on these silica gels reached 20 nm from solid surface. The pore diameter in each dried gel almost corresponded to the surface distance, which acted the additional repulsive force.

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