A Study on the Simulation System of Landscape Lighting and the Luminance Perception

2011 ◽  
Vol 374-377 ◽  
pp. 2371-2374
Author(s):  
Li Ye Sun ◽  
Li Xin Sun ◽  
Shu Min Tang ◽  
Hong Hai
Keyword(s):  
Statistical Analysis ◽  
Visual Angle ◽  
Theoretical Basis ◽  
Subjective Evaluation ◽  
Simulation System ◽  
Scene Simulation ◽  
Planning And Design ◽  
Low Luminance ◽  
Simulation And Evaluation

Considering the characteristics of vision in different luminance levels and the errors of the visual angle restituting, this research obtains a series of simulant scenes and the quantity relations between the luminance of actual scenes and reappearance scenes in the low luminance and weak contrast environment. Finally, carrying the subjective evaluation of these scenes, it obtains the scope of luminance and the quantification relations among these stimulus by statistical analysis. This paper provides theoretical basis for scene simulation and evaluation, and obtain quantitative suggestions for corresponding standards. It has important theory significance and the practical value for landscape lighting planning and design.

An Experimental Study on the Luminance Perception of Lighting Environment

2011 ◽  
Vol 250-253 ◽  
pp. 3159-3162
Author(s):  
Li Ye Sun ◽  
Gang Liu ◽  
Hong Hai
Keyword(s):  
Experimental Study ◽  
Theoretical Basis ◽  
Subjective Evaluation ◽  
Psychological Factor ◽  
Qualitative Description ◽  
Quantitative Index ◽  
Low Luminance ◽  
Quantification Analysis ◽  
Lighting Environment ◽  
Luminance Stimulus

Considering the characteristics of vision in the low luminance and weak contrast environment, this research obtains a series of simulant scenes. By means of experiment observation, quantification analysis and subjective evaluation, this research proposes a kind of scientific and controllable methods and modes, then relates the quantitative index and the qualitative description in order to take physics and psychological factor into the comprehensive consideration in lighting environment. Finally, it obtains the scope of luminance stimulus and the quantification relations. The results of this research can provide theoretical basis, model and quantitative suggests for corresponding standards. It has significance to urban lighting planning, design and management.

Carnival and Caucus: A Typology for Comparative Frontier History

1987 ◽  
Vol 11 (2) ◽  
pp. 139-167
Author(s):  
Richard Hogan
Keyword(s):  
Comparative Analysis ◽  
Statistical Analysis ◽  
Empirical Evidence ◽  
Theoretical Basis ◽  
Democratic Governance ◽  
Local History ◽  
The Other ◽  
American Frontier ◽  
Research Traditions ◽  
Community Solidarity

As Dykstra and Silag (1985) have noted, the analysis of American frontier towns continues to yield a plethora of local histories that might provide an empirical basis for generalization, if a theoretical basis for comparative analysis might be offered. The development of a rigorous methodology for historiographie and statistical analysis has facilitated the accumulation of empirical evidence, but the analysis of local history has not advanced far beyond the initial debate regarding the basis for democratic governance (Taylor, 1956). Instead, two research traditions have developed—one seeking to identify the socio-cultural basis for community solidarity, the other focusing on the partisan struggles that shape democratic governance.

A Study on the Luminance of Landscape Lighting of Chinese Classical Architectures Based on Mesopic Vision

2011 ◽  
Vol 224 ◽  
pp. 175-178
Author(s):  
Li Ye Sun ◽  
Gang Liu ◽  
Hong Hai
Keyword(s):  
Subjective Evaluation ◽  
Qualitative Description ◽  
Experimental Result ◽  
Mesopic Vision ◽  
Cultural Connotation ◽  
Low Luminance ◽  
Quantification Analysis ◽  
Lighting Environment ◽  
The Relationship ◽  
Chinese Classic

Landscape lighting of Chinese classic architectures can reappearing the historical, cultural connotation and artistic appeal of architectures at night. Most of these scenes are low luminance and weak contrast, and the visual level is in mesopic vision. Taking the Summer Place as an example, considering the characteristics of vision in different luminance levels, this research obtains a series of simulant scenes with low luminance and weak contrast in mesopic vision by using physical quantity relations between the luminance of actual scene and reappearance scene. Utilizing experiment observation, computer simulation, quantification analysis and subjective evaluation, the research relate the quantitative index and the qualitative description and then realize the synthetically consideration of the relationship between the physics and the psychology stimulation in the lighting environment. Through the statistical analysis of experimental result, it suggests the satisfactory scope of the luminance and the luminance ratio. Similarly, the results of this research have significance to energy saving and the development of green lighting.

Statistical Analysis of the Channelized Traffic and Road Condition Investigation about Beijing-Zhuhai Expressway

2012 ◽  
Vol 204-208 ◽  
pp. 1957-1960
Author(s):  
Zhi Jian Yang
Keyword(s):  
Statistical Analysis ◽  
Theoretical Basis ◽  
Traffic Conditions ◽  
Road Condition ◽  
Survey Results ◽  
Pavement Structure

We conducted a survey about the representative six sections of Beijing-Zhuhai expressway, including channelized traffic conditions and the corresponding traffic for this highway. And we were statistically analyzed to survey results. We had a new understanding to the operational status of domestic highway. Lane design for the pavement structure provided a theoretical basis.

Wind Environment Simulation and Evaluation of the Residential District in Wuhan: A Case Study of Jiao Gong District in Wuhan University

2014 ◽  
Vol 926-930 ◽  
pp. 4406-4410
Author(s):  
Yi Qian ◽  
Tao Shang ◽  
Jie Yin
Keyword(s):  
Natural Ventilation ◽  
Green Building ◽  
Climatic Conditions ◽  
Wind Environment ◽  
Planning And Design ◽  
Outdoor Walking ◽  
Outdoor Comfort ◽  
Environment Simulation ◽  
Residential District ◽  
Simulation And Evaluation

Architectural outdoor wind environment simulation is an important part of green building certification. This paper is based on the natural climatic conditions of the Wuhan region, using RNG model of software of Airpak to simulate and evaluate the wind environment of Jiao Gong district in Wuhan University both in summer and winter. Through the simulation of outdoor comfort of the building environment and building monomer pressure distribution in the residential district, we find that the residential district meets standard of the national green building evaluation for outdoor walking comfort in winter and natural ventilation in summer. At the same time, this simulation can guide the local residential district planning and design program decision-making from the view of forming excellent wind environment.

TAWAF CROWD SIMULATION USING SOCIAL FORCE MODEL

2015 ◽  
Vol 75 (2) ◽  
Author(s):  
Ahmad Zakwan Azizul Fata ◽  
Sarudin Kari ◽  
Mohd Shafry Mohd Rahim
Keyword(s):  
Subjective Evaluation ◽  
Crowd Simulation ◽  
Simulation System ◽  
Force Model ◽  
Social Force ◽  
Unique Case ◽  
Specific Behavior ◽  
Social Force Model ◽  
And Behavior

This paper presents a crowd simulation system which simulates the movement of pilgrims in performing one of Hajj rituals, which is Tawaf. Tawaf is a unique case study due to its capacity and various set of pilgrims. Furthermore, the density of the crowd is extremely high. Tawaf also consist a certain set of rules and regulations that must be followed by the pilgrims. Social Force Model had been chosen to give each agent in the simulation a specific behavior to be followed. The algorithm also specifies how the agents interact with each other to generate collision free movements. To make the simulations as close as possible to real world scenarios, each agent varies in term of age, gender and behavior. The subjective evaluation of the system revealed that it can be used in pilgrim training before performing the actual Tawaf.

Design and Realization of Visual Simulation Control Based on Common Image Generation Interface

2014 ◽  
Vol 1030-1032 ◽  
pp. 1692-1695
Author(s):  
Xiu Zhi Zhou ◽  
Zhan Ping Fu ◽  
Zhi Le Wang
Keyword(s):  
Real Time ◽  
Simulation System ◽  
Visual Simulation ◽  
Image Generation ◽  
Time Requirement ◽  
Scene Simulation ◽  
System A ◽  
Simulation Control ◽  
Simulation Results ◽  
Exchange Data

Common Image Generation Interface is the interface between two real-time communication subsystems. In order to exchange data between control end and rendering end of the scene simulation system, a packaging component based on common image generation interface is proposed in this paper, which is applied to visual simulation of helicopters and fighter. The simulation results show that this method can meet the real-time requirement of visual control system and is valuable in visual simulation of the weapon equipment operational field.

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