Novel Method for Ozone Isopleth Construction and Diagnosis for the Ozone Control Strategy of Chinese Cities

2021 ◽  
Author(s):  
Huizhong Shen ◽  
Zhe Sun ◽  
Yilin Chen ◽  
Armistead G. Russell ◽  
Yongtao Hu ◽  
...  
Keyword(s):  
Control Strategy ◽  
Chinese Cities ◽  
Novel Method ◽  
Ozone Control

scholarly journals A Novel Control Strategy for Multiple Switches Based on Electro-Rheological Fluid

2012 ◽  
Vol 4 ◽  
pp. 95-100 ◽  
Author(s):  
Lu Ning Xu ◽  
Han Li ◽  
Jun Biao Liu
Keyword(s):  
Embedded System ◽  
Control Strategy ◽  
System Application ◽  
Blind People ◽  
System A ◽  
Novel Method ◽  
Electronic Parts

A compact or portable mechatronic embedded system application has a strictly demands of volume and/or power consuming. Comparing with electronic parts, switches and/or actuators take the most proportion of volume or weight and power consuming of the whole system. A novel method of connecting multiple switches/actuators built by using electro-rheological fluid and a pair of governing electrodes and their control strategy are introduced in this paper. By using this method, the numbers of control components are changed from N times M to N plus M, the volume and weight reduced largely.A series structure is used in the application on multi-line Braille electro-book for blind people as a demonstration of this novel method. It provides a novel solution of shrinking system for a compact or portable mechatronic embedded system application.

scholarly journals A Study on the Ozone Control Strategy using the OZIPR in the Seoul Metropolitan Area

2012 ◽  
Vol 6 (2) ◽  
pp. 111-117 ◽  
Author(s):  
Lan Jin ◽  
Sun-Hwa Lee ◽  
Hye-Jung Shin ◽  
Yong Pyo Kim
Keyword(s):  
Metropolitan Area ◽  
Control Strategy ◽  
Seoul Metropolitan Area ◽  
Ozone Control

A novel method for urban area extraction from VIIRS DNB and MODIS NDVI data: a case study of Chinese cities

2017 ◽  
Vol 38 (21) ◽  
pp. 6094-6109 ◽  
Author(s):  
Qiao Zhang ◽  
Ping Wang ◽  
Hui Chen ◽  
Qinglun Huang ◽  
Hongbing Jiang ◽  
...  
Keyword(s):  
Urban Area ◽  
Chinese Cities ◽  
Modis Ndvi ◽  
Novel Method

scholarly journals Quantitative impacts of meteorology and precursor emission changes on the long-term trend of ambient ozone over the Pearl River Delta, China and implications for ozone control strategy

2019 ◽  
Author(s):  
Leifeng Yang ◽  
Huihong Luo ◽  
Zibing Yuan ◽  
Junyu Zheng ◽  
Zhijiong Huang ◽  
...  
Keyword(s):  
Control Strategy ◽  
Pearl River Delta ◽  
Pearl River ◽  
The Past ◽  
Ambient Ozone ◽  
Ozone Control ◽  
Emission Changes ◽  
Ozone Episodes ◽  
The Impact ◽  
General Conditions

Abstract. China is experiencing increasingly serious ambient ozone pollution, including the economically developed Pearl River Delta (PRD) region. However, the underlying reasons for ozone increase remain largely unclear, leading to perplexity in formulating effective ozone control strategies. In this study, by developing a statistical analysis framework combining meteorological adjustment and source apportionment, we examine quantitatively the impacts of meteorology and precursor emissions from within and outside the PRD on the evolution of ozone during the past decade. We found that meteorological condition has mitigated ozone increase, and its variation can account for at most 15 % of annual ozone concentration in the PRD. Precursor emission from outside the PRD (non-local) makes the largest contribution to ambient ozone in the PRD and shows a consistently increasing trend, while that from within the PRD (local) shows a significant spatial heterogeneity and plays a more important role during ozone episodes over southwestern. Under general conditions, the impact on northeastern is positive but decreasing, and on southwestern is negative but increasing. During ozone episodes, the impact on northeastern is negative and decreasing, while on southwestern is positive but decreasing. Central and western PRD is the only area with increasing local ozone contribution. The spatial heterogeneity in both local ozone contribution and its trend under general conditions and ozone episodes are well interpreted by a conceptual model collectively taking into account ozone precursor emissions and their changing trends, ozone formation regimes, and the monsoonal and micro-scale synoptic conditions over different sub-regions of the PRD. In particular, we conclude that the inappropriate NOx / VOC control ratio within the PRD over the past years is most likely responsible for the ozone increase over southwestern, both under general conditions and during ozone episodes. By investigating the ozone evolution influenced by emission changes within and outside PRD during the past decade, this study highlights the importance of establishing a dichotomous ozone control strategy to tackle with general conditions and pollution events separately. NOx emission control should be further strengthened to alleviate peak ozone level during episodes. Detailed investigation is needed to retrieve appropriate NOx / VOC ratios for different emission and meteorological conditions, so as to maximize the ozone reduction efficiency in the PRD.

scholarly journals Design of a Load Torque Based Control Strategy for Improving Electric Tractor Motor Energy Conversion Efficiency

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Mengnan Liu ◽  
Liyou Xu ◽  
Zhili Zhou
Keyword(s):  
Energy Conversion ◽  
Conversion Efficiency ◽  
Control Strategy ◽  
Electric Motor ◽  
Mechanical Performance ◽  
Electrical Power ◽  
Energy Conversion Efficiency ◽  
Load Torque ◽  
Novel Method ◽  
The Common

In order to improve the electrical conversion efficiency of an electric tractor motor, a load torque based control strategy (LTCS) is designed in this paper by using a particle swarm optimization algorithm (PSO). By mathematically modeling electric-mechanical performance and theoretical energy waste of the electric motor, as well as the transmission characteristics of the drivetrain, the objective function, control relationship, and analytical platform are established. Torque and rotation speed of the motor’s output shaft are defined as manipulated variables. LTCS searches the working points corresponding to the best energy conversion efficiency via PSO to control the running status of the electric motor and uses logic and fuzzy rules to fit the search initialization for load torque fluctuation. After using different plowing forces to imitate all the common tillage forces, the simulation of traction experiment is conducted, which proves that LTCS can make the tractor use electrical power efficiently and maintain agricultural applicability on farmland conditions. It provides a novel method of fabricating a more efficient electric motor used in the traction of an off-road vehicle.

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