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.

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.

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.

Research on Propagation Numerical Simulation of Blast Shock Waves in Subway Station

2013 ◽  
Vol 380-384 ◽  
pp. 1725-1728
Author(s):  
Yang Hu ◽  
Huai Yu Kang
Keyword(s):  
Numerical Simulation ◽  
Shock Wave ◽  
Experimental Study ◽  
Shock Waves ◽  
Theoretical Basis ◽  
Damage Effect ◽  
Subway Station ◽  
Element Calculation ◽  
Dynamic Finite Element ◽  
Walking Pattern

In this paper, we Research on Propagation Numerical Simulation and damage effect of Blast Shock Waves in Subway Station by using LS-DYNA dynamic finite element calculation program , the results reproduce the formation process of the explosive flow field, and analysis the shock wave waveform, attenuation and walking pattern, provides the theoretical basis for further experimental study.

Study on Subjective Evaluation of Comfort of Lighting Environment in Nursing Institutions

2016 ◽  
Vol 858 ◽  
pp. 262-266
Author(s):  
Yuan Yuan Zhou ◽  
Wang Da Zhu
Keyword(s):  
Factor Analysis ◽  
Subjective Evaluation ◽  
Analysis Method ◽  
Environment Quality ◽  
Switch Control ◽  
Sense Of Security ◽  
Lighting Environment ◽  
Main Factors

This paper investigated and determined the subjective evaluation indicators of comfort in lighting environment for elderly in nursing institutions. Factor analysis method was utilized and the result showed that the recognition of space and figures, sense of security from even illumination, convenience of switch control and no glare were the main factors. The conclusion of the study was not only used to evaluate the lighting environment quality, but also used to guide the design of lighting environment in nursing institutions.

Experimental Research on Water Cushion Belt Conveyor

2013 ◽  
Vol 431 ◽  
pp. 88-92
Author(s):  
Ai Dong Zhang ◽  
Ri Cheng Xu ◽  
Yun Meng ◽  
Xun Fan
Keyword(s):  
Experimental Study ◽  
Influencing Factors ◽  
Experimental Research ◽  
Industrial Application ◽  
Theoretical Basis ◽  
Belt Conveyor ◽  
New Type ◽  
Air Cushion

Water cushion belt conveyor is a new type of continuous conveyor which develops from belt conveyor and air cushion belt conveyor .By experimental research on water cushion belt conveyor ,we can observe the condition of water cushion and accomplish the date acquisition of water cushion pressure .Analyzing the pressure ,we can get influencing factors of water cushion pressure and verify the feasibility of industrial application of water cushion belt conveyor .Combining theory study with experimental study ,provide theoretical basis and guide for the further progress of water cushion belt conveyor .

Experimental Study on Post-Anchoring Pulling-Out Bearing Capacity of Inorganic Materials in Concrete Test Cubes

2012 ◽  
Vol 166-169 ◽  
pp. 420-425
Author(s):  
Shi Qi Cui ◽  
Li Ping Jiang ◽  
Bo Cheng ◽  
Tao Wang
Keyword(s):  
Experimental Study ◽  
Theoretical Basis ◽  
Inorganic Material ◽  
Concrete Strength ◽  
Technical Specification ◽  
Concrete Cover ◽  
Adhesive Property ◽  
Inorganic Materials ◽  
Transverse Reinforcement ◽  
Cover Thickness

Through the test and observe the failure deformation in concrete test cube, the paper analyze the influence of concrete strength, concrete cover thickness, internal reinforcement cage(transverse reinforcement), reinforcement diameter on the inorganic material reinforcement adhesive property, providing theoretical basis for the code of Technical specification for post-anchoring used in concrete structure with inorganic anchoring material.

Experimental Study on Seepage Model of Rubber-Plastic Porous Tube

2011 ◽  
Vol 314-316 ◽  
pp. 311-314
Author(s):  
Qi Dong Chen ◽  
Chun Yan He ◽  
Tao Meng
Keyword(s):  
Experimental Study ◽  
Drip Irrigation ◽  
Theoretical Basis ◽  
Darcy Law ◽  
Porous Tube ◽  
Actual Application ◽  
Material Characteristics ◽  
Seepage Model ◽  
Seepage Law

This paper analyses seepage model of rubber-plastic porous tube by the Darcy law based on its material characteristics. Integrating seepage examinations the seepage law of porous tube was found ,providing theoretical basis for actual application of rubber-plastic porous tube in drip irrigation、aeration and so on .

Ethylene Polymerization via Metallocenes: An Experimental Study

2015 ◽  
Vol 1767 ◽  
pp. 11-16
Author(s):  
Ramiro Infante-Martínez ◽  
Enrique Saldívar-Guerra ◽  
Odilia Pérez-Camacho ◽  
Maricela García-Zamora
Keyword(s):  
Experimental Study ◽  
Theoretical Basis ◽  
Ethylene Polymerization ◽  
Kinetic Modelling ◽  
Experimental Program ◽  
Quality Information ◽  
High Quality Information ◽  
Energy Balances ◽  
Modelling Data

ABSTRACTAn experimental study oriented to gather kinetic modelling data in the ethylene polymerization via metallocenes is reported. Also is illustrated the employment of two methods for determination of kinetic behavior and the instantaneous activity of Ziegler-Natta catalysts in the slurry polymerization of ethylene. The theoretical basis for both methods is described as well as the required instrumentation for its implantation at a laboratory level. An experimental program of polymerization with two different metallocenic systems was executed, showing that the direct (measurement of ethylene flow) as well as the calorimetric method (based on energy balances) give equivalent high quality information on the kinetic performance of the catalyst.

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