Point Source sensitivity, Pupil alignment, Calibration and Control for TMT-NFIRAOS-IRIS

2017 ◽  
Author(s):  
Glen Herriot
Keyword(s):  
Point Source ◽  
And Control

Review of Current Situation of Agricultural Non-Point Source Pollution and Its Prevention and Control Technologies

2018 ◽  
Vol 20 (5) ◽  
pp. 23
Author(s):  
Shuxia Wu ◽  
Hongbin Liu ◽  
Shen Liu ◽  
Yaosheng Wang ◽  
Baojing Gu ◽  
...  
Keyword(s):  
Point Source ◽  
Prevention And Control ◽  
Current Situation ◽  
Point Source Pollution ◽  
Control Technologies ◽  
And Control ◽  
Non Point Source Pollution

Risk Prevention and Control for Agricultural Non-Point Source Pollution Based on the Process of Pressure-Transformation-Absorption in Chongqing, China

2021 ◽  
Vol 31 (4) ◽  
pp. 735-750
Author(s):  
Kangwen Zhu ◽  
Yucheng Chen ◽  
Sheng Zhang ◽  
Zhimin Yang ◽  
Lei Huang ◽  
...  
Keyword(s):  
Point Source ◽  
Prevention And Control ◽  
Risk Prevention ◽  
Point Source Pollution ◽  
And Control ◽  
Non Point Source Pollution

scholarly journals A Guidance and Control Algorithm for Scent Tracking Micro-Robotic Vehicle Swarms

1998 ◽  
Vol 120 (3) ◽  
pp. 353-359 ◽  
Author(s):  
J. L. Dohner
Keyword(s):  
Point Source ◽  
Control Algorithm ◽  
Social Rank ◽  
Complex Environments ◽  
Guidance And Control ◽  
New Concepts ◽  
Robotic Vehicle ◽  
Cooperative Guidance And Control ◽  
Cooperative Vehicles ◽  
And Control

Cooperative micro-robotic scent tracking vehicles are designed to collectively “sniff out” locations of high scent concentrations in unknown, geometrically complex environments. These vehicles are programed with guidance and control algorithms that allow inter cooperation among vehicles. In this paper, a cooperative guidance and control algorithm for scent tracking micro-robotic vehicles is presented. This algorithm is comprised of a sensory compensation sub-algorithm using point source cancellation, a guidance sub-algorithm using gradient descent tracking, and a control sub-algorithm using proportional feedback. The concepts of social rank and point source cancellation are new concepts introduced within. Simulation results for cooperative vehicles swarms are given. Limitations are discussed.

scholarly journals The Influence of Different Forest Characteristics on Non-point Source Pollution: A Case Study at Chaohu Basin, China

2020 ◽  
Vol 17 (5) ◽  
pp. 1790
Author(s):  
Hao Cheng ◽  
Chen Lin ◽  
Liangjie Wang ◽  
Junfeng Xiong ◽  
Lingyun Peng ◽  
...  
Keyword(s):  
Point Source ◽  
Prevention And Control ◽  
Pollution Prevention ◽  
Forest Land ◽  
Point Source Pollution ◽  
Nps Pollution ◽  
Forest Coverage ◽  
Pollution Prevention And Control ◽  
And Control ◽  
Non Point Source Pollution

Forestland is a key land use/land cover (LULC) type that affects nonpoint source (NPS) pollution, and has great impacts on the spatiotemporal features of watershed NPS pollution. In this study, the forestland characteristics of the Chaohu Basin, China, were quantitatively represented using forestland types (FLTs), watershed forest coverage (WFC) and forest distance from the river (DFR). To clarify the impact of forests on NPS pollution, the relationship between forestland characteristics and watershed nutrient outputs (TN and TP) was explored on a monthly scale using SWAT (Soil and Water Assessment Tool) and the period simulation was 2008–2016. The results showed that: (1) the TN and TP showed similar output characteristics and the rainy season was the peak period of nitrogen and phosphorus output. (2) Among the forestland characteristics of forestland types, watershed forest coverage and forest distance from the river, watershed forest coverage and forest distance from the river had greater effects than forestland types on the control of watershed nutrient outputs (TN and TP). (3) In different forestland types, the watershed nutrient outputs intensity remained at the lowest level when the FLTs was mixed forest, with a TN output of 1244.73kg/km2 and TP output of 341.39 kg/km2. (4) The watershed nutrient outputs and watershed forest coverage were negatively correlated, with the highest watershed forest coverage (over 75%) reducing the TN outputs by 56.69% and the TP outputs by 53.46% compared to the lowest watershed forest coverage (below 25%), it showed that in areas with high forest land coverage, the non-point source pollution load in the watershed is smaller than in other areas. (5) forest distance from the river had an uncertain effect on the TN and TP output of the basin, the forestland itself is a source of pollution, but it also has the function of intercepting pollution movement; the forest distance from the river in the range of 500–1000 m had the lowest NPS pollution. Considering the different forest characteristics and topographical factors, an optimal allocation mode of differentiated forest land was proposed, these suggestions will provide a scheme for surface source pollution prevention and control in the basin. This research gap is the basis of real forestland optimization. We may optimize the forestland layout for NPS pollution prevention and control by clarifying the internal mechanism.

Study on the Effect of Rice-Frog System on Controlling Agricultural Non-Point Source Pollution

2012 ◽  
Vol 468-471 ◽  
pp. 2637-2640
Author(s):  
Mu Qing Qiu ◽  
Xiao Bo Yao ◽  
Li Yang
Keyword(s):  
Point Source ◽  
Agricultural Production ◽  
Pollution Prevention ◽  
Rice Paddy ◽  
Point Source Pollution ◽  
Symbiotic System ◽  
Wide Range ◽  
The Status ◽  
And Control ◽  
Non Point Source Pollution

China's agricultural production in the course of a wide range of point source pollution, large and difficult to control. Symbiotic system rice-frog as a good traditional agricultural production, with outstanding ecological, economic and other values, has been identified as globally important agricultural heritage and the first to be protected. Summary of agricultural non-point source pollution in the status quo to explain the symbiotic system rice-frog to reduce agricultural nonpoint source pollution in the role, made on the basis of frog in rice paddy planting to optimize the structure, development of ecological agriculture is the agricultural non-point source pollution prevention and control an effective way.

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