Eco-village Construction and Pollution Control Effect Analysis

2019 ◽  
pp. 233-267
Author(s):  
Jianfeng Zhang
Keyword(s):  
Pollution Control ◽  
Control Effect ◽  
Effect Analysis ◽  
Eco Village

Effect Analysis of Different Exhaust Velocity on Fire Smoke Control in Subway Tunnel

2012 ◽  
Vol 424-425 ◽  
pp. 1224-1227
Author(s):  
Xin Han ◽  
Xiao Ming Gao ◽  
Bei Hua Cong
Keyword(s):  
Cfd Simulation ◽  
Simulation Analysis ◽  
Simulation Method ◽  
Subway Tunnel ◽  
Control Effect ◽  
Smoke Control ◽  
Effect Analysis ◽  
Longitudinal Ventilation ◽  
Fire Smoke ◽  
Ventilation Velocity

Taking a subway tunnel as the research object and based on the CFD simulation method, this paper adopts a large eddy simulation analysis software FDS to simulate and analyze the effect of exhaust velocity on fire smoke control under the condition of the same longitudinal ventilation velocity in subway tunnel. The simulated results can provide some reference to design institutes in the selection of exhaust fan. While the longitudinal ventilation velocity set as 1m/s, the simulation results demonstrate that a quite good smoke control effect could be achieved when the exhaust velocity reaches 5 m/s in the smoke exhaust duct

The Control Effect Analysis of the Variable Frequency TMD Applied to the Frame Structure

2012 ◽  
Vol 446-449 ◽  
pp. 3486-3489
Author(s):  
Mao Yu Zhang ◽  
Bo Li ◽  
Yan Ru Wang
Keyword(s):  
Dynamic Response ◽  
Dynamic Analysis ◽  
Frame Structure ◽  
Variable Frequency ◽  
Control Effect ◽  
Effect Analysis ◽  
High Rise ◽  
High Rise Building ◽  
Multiple Frequencies ◽  
And Control

Frequency variable TMD system is developed based on the conventional TMD system, which has multiple frequencies and thus merits of MTMD. Frequency variable TMD can effectively reduce the dynamic response of structure induced by its own frequencies. In this study, this technique is applied to dynamic analysis of high-rise building. The results show that frequency variable TMD system can optimize the dynamic response of the structure and control the vibration effectively, compared to conventional TMD system.

scholarly journals Does Technological Innovation Promote Haze Pollution Control? New Evidence Based on Panel Threshold Model and Spatial Econometric Model

2022 ◽  
Vol 9 ◽  
Author(s):  
Weiwei Shi ◽  
Lin Zhang
Keyword(s):  
Sustainable Development ◽  
Panel Data ◽  
Technological Innovation ◽  
Pollution Control ◽  
High Energy ◽  
Composition Analysis ◽  
Control Effect ◽  
Haze Pollution ◽  
Pm2.5 Concentration

Since the reform and opening up, China’s rapid economic growth mainly depends on the industrial development mode of “high energy consumption and high pollution,” which has caused serious haze pollution. In order to achieve the goal of haze control and sustainable development, we need to give full play to the role of technological innovation. Empirical analysis of the haze control effect of technological innovation has theoretical significance and practical value. Based on the panel data of 30 provinces in China from 2005 to 2018 and the PM2.5 concentration data published by the atmospheric composition analysis group of Dalhousie University, this study selects R&D personnel input and technology market turnover to represent the level of technological innovation and uses the panel data model, threshold effect model, and spatial Durbin model to empirically analyze the impact of technological innovation on haze pollution control. The empirical results show that 1) technological innovation can significantly reduce the PM2.5 concentration of the province, showing a positive haze control effect; 2) technological innovation indicates a negative indirect effect on PM2.5 concentration, confirming the “technology spillover effect,” that is, technological innovation also has a haze control effect on the surrounding provinces; 3) with the increase in the province’s economic aggregate, the haze control effect of technological innovation shows a trend of “high low high,” and the role of technological innovation is the lowest in the stage of economic transformation; and 4) from the perspective of regional differentiation, the haze control effect of technological innovation is the largest in the central region, and the smallest in the western region. Technological innovation indicates a positive haze control effect on all regions at all stages of economic development. This study provides policy suggestions for the government and enterprises to use innovation for cleaner production and sustainable development.

Vibration Control Effect Analysis on Tuned Mass Damper System Used in Urban Transportation

2012 ◽  
Vol 468-471 ◽  
pp. 1294-1299 ◽  
Author(s):  
Li Li ◽  
Chuan Zhi Geng ◽  
Ye Tian ◽  
Qing Yu
Keyword(s):  
Vibration Control ◽  
Impact Load ◽  
Effective Means ◽  
Urban Transportation ◽  
Tuned Mass Damper ◽  
Control Effect ◽  
Effect Analysis ◽  
Mass Damper ◽  
Reduction Effect ◽  
And Performance

With the development of urban transportation, vibration and noise control has attracted increasing attention. Vibration and noise level has become one of the important hallmarks of evaluating the influence of urban transportation to environment. As Tuned Mass Damper (TMD) is an effective means of vibration control, there is more and more emphasis on its research and application. Reasonably designed TMD can reduce vibration and noise caused by wheel/rail impact. So how to take into account the complex factors to improve the design of the TMD is still the important issue. TMD system is an effective structure. In order to study its vibration reduction effect, modal calculation and wheel-set drop simulation have been analyzed in this paper. Through varying the mass of TMD, the performance of vibration attenuation have been verified. The stability and performance of damping property under impact load have been confirmed by wheel-set drop simulation. Comparing the track which uses TMD and the normal one, the effect of TMD system can be testified effectively.

scholarly journals Assessing the Effect of the Chinese River Chief Policy for Water Pollution Control under Uncertainty—Using Chaohu Lake as a Case

2020 ◽  
Vol 17 (9) ◽  
pp. 3103 ◽  
Author(s):  
Xia Xu ◽  
Fengping Wu ◽  
Lina Zhang ◽  
Xin Gao
Keyword(s):  
Water Pollution ◽  
Differential Game ◽  
Pollution Control ◽  
Water Resource Management ◽  
Chaohu Lake ◽  
Control Effect ◽  
Water Pollution Control ◽  
Effective Implementation ◽  
Resource Management System ◽  
Control Under Uncertainty

The River Chief Policy (RCP) is an innovative water resource management system in China aimed at managing water pollution and improving water quality. Though the RCP has been piloted in some river basins of China, few scholars have studied the effects of the policy. We built a differential game model under random interference factors to compare the water pollution in Chaohu Lake under the RCP and without the RCP, and we explored the conditions to ensure the effectiveness of the RCP. The results showed that: (1) The average effect of water pollution control under the RCP was greater than under non-RCP; (2) the higher the rewarding excellence and punishing inferiority coefficient ( θ ) was, the better the water pollution control effect under the RCP; (3) the greater the random interference coefficient ( σ ) and rewarding excellence and punishing inferiority coefficient ( θ ) were, the bigger the fluctuation of the water pollution control effect was; (4) when using the stochastic differential game, when σ ≤ 0.0403 , θ ≥ 0.0063 , or σ > 0.0403 , θ ≥ 0.268 , the RCP must be effective for water pollution control. Therefore, we can theoretically adjust the rewarding excellence and punishing inferiority coefficient ( θ ) and the random interference coefficient ( σ ) to ensure the effective implementation of the RCP and achieve the purpose of water pollution control.

Sign in / Sign up

Export Citation Format

Share Document