Analysis of the EAST Cryogenic System Operational Modes

2010 ◽  
Author(s):  
Liangbing Hu ◽  
Zhiwei Zhou ◽  
Chunyan Yuan ◽  
Ming Zhuang
Keyword(s):  
Cryogenic System ◽  
Short Term ◽  
Operating Modes ◽  
Technical Specifications ◽  
Operation Schedule ◽  
Operational Modes ◽  
Heat Loads ◽  
Term Maintenance ◽  
System Operating ◽  
Conditioning State

For EAST operation schedule, auxiliary subsystems like the cryogenic system have to cope with different heat loads which depend on the different EAST operating states. The cryogenic system consists of a cryoplant and a cryodistribution system. All of these cryogenic subsystems have to operate in parallel to remove the heat loads from the magnet, 80K shields, built-in cryopumps and other small users. After a brief recall of the main particularities of a cryogenic system operating in a Tokamak environment, the first part of this study is dedicated to the assessment of the main EAST operation states. A new design of refrigeration loop for the HTS current leads, the updated layout of the cryodistribution system and revised strategy for operations of the built-in cryopumps have been taken into consideration. The relevant normal operating scenarios of the cryoplant are checked for the typical EAST operating states like plasma operation state, short term stand by, short term maintenance, or test and conditioning state. The second part of the paper is dedicated to the abnormal operating modes coming from the magnets and from those generated by the cryoplant itself. Thanks to this analysis, the optimization of the present operational modes is proposed to make match the technical specifications of the cryogenic system with the EAST operation requirements.

scholarly journals Very-short term solar power generation forecasting based on trend-additive and seasonal-multiplicative smoothing methodology

2018 ◽  
Vol 51 ◽  
pp. 02003
Author(s):  
Stanislav Eroshenko ◽  
Alexandra Khalyasmaa ◽  
Rustam Valiev
Keyword(s):  
Solar Power ◽  
Forecast Error ◽  
Renewable Energy Sources ◽  
Power Station ◽  
Short Term ◽  
Operating Modes ◽  
Power Stations ◽  
Operational Forecasting ◽  
Solar Power Station ◽  
System Operating

In conditions of development of generating facilities on renewable energy sources, the technology runs up to uncertainty in the operational and short-term planning of the power system operating modes. To date, reliable tools for forecasting the generation of solar power stations are required. This paper considers the methodology of operational forecasting of solar power stations output based on the mathematical apparatus of cubic exponential smoothing with trend and seasonal components. The presented methodology was tested based on the measuring data of a real solar power station. The average forecast error was not more than 10% for days with variable clouds and not more than 3% for clear days, which indicates the effectiveness of the proposed approach.

scholarly journals Very-short term solar power generation forecasting based on trend-additive and seasonal-multiplicative smoothing methodology

2018 ◽  
Vol 51 ◽  
pp. 02003
Author(s):  
Stanislav Eroshenko ◽  
Alexandra Khalyasmaa ◽  
Rustam Valiev
Keyword(s):  
Solar Power ◽  
Forecast Error ◽  
Renewable Energy Sources ◽  
Power Station ◽  
Short Term ◽  
Operating Modes ◽  
Power Stations ◽  
Operational Forecasting ◽  
Solar Power Station ◽  
System Operating

In conditions of development of generating facilities on renewable energy sources, the technology runs up to uncertainty in the operational and short-term planning of the power system operating modes. To date, reliable tools for forecasting the generation of solar power stations are required. This paper considers the methodology of operational forecasting of solar power stations output based on the mathematical apparatus of cubic exponential smoothing with trend and seasonal components. The presented methodology was tested based on the measuring data of a real solar power station. The average forecast error was not more than 10% for days with variable clouds and not more than 3% for clear days, which indicates the effectiveness of the proposed approach.

Studies on the functional activity of organotypically cultured mouse ovary

Development ◽  
1966 ◽  
Vol 15 (2) ◽  
pp. 133-141
Author(s):  
T. N. Chapekar ◽  
G. V. Nayak ◽  
Kamal J. Ranadive
Keyword(s):  
Functional Activity ◽  
Synthetic Medium ◽  
Culture Conditions ◽  
Short Term ◽  
Plasma Clot ◽  
Rat Ovary ◽  
Old Mice ◽  
Term Maintenance

Short-term maintenance of mouse and rat ovary in organotypic culture system is no longer a problem (Martinovitch, 1938; Gaillard, 1953; Trowell, 1959). Gaillard (1953) cultivated ovaries from 7- to 8-day-old and 21-day-old mice for a week on the plasma clot. Trowell (1959) maintained ovaries of 8-day-old mice on a synthetic medium in an O2-CO2 atmosphere for 9 days. He observed no histological differentiation in the tissues of the ovary. What needs confirmation and further investigation is the possibility of maintenance of functional activity of the ovary under culture conditions. A study was therefore undertaken to investigate if an ovary, cultivated in vitro for some time, shows hormonal activity when transplanted in vivo. In the present work cultured ovaries were grafted in the anterior eye-chamber of spayed female mice and the development of secondary sex organs such as mammary glands and uterus was studied.

scholarly journals Risk Based Improvement Performance Strategy for Operation and Maintenance Activities of River and River Infrastructure (BBWS Ciliwung-Cisadane Authority)

2021 ◽  
Vol 1 ◽  
Author(s):  
Isni Septima Anindhita
Keyword(s):  
Flood Control ◽  
Public Works ◽  
Short Term ◽  
Risk Response ◽  
Operation And Maintenance ◽  
Recommendations For Action ◽  
Maintenance Activities ◽  
Sustainable System ◽  
Term Maintenance

The Ministry of Public Works and Public Housing (PUPR) has the duty and responsibility to carry out effective and efficient river operation activities and river infrastructure including overcoming floods during the rainy season, but these activities are deemed necessary for improvement in planning procedures. To realize this goal, it is necessary to manage risks that can reduce river performance and river infrastructure as flood control. With risk management in this activity, it is possible to apply the sequence of risks that occur which are then used as recommendations for action (risk response) and risk-based development strategies to improve river performance and river infrastructure to control floods through operation and maintenance activities to build a functional and sustainable system. Suitable for long-term planning and short-term maintenance needs.

scholarly journals Operating Modes of The SSC Sector Station Cryogenic System

1994 ◽  
pp. 459-463
Author(s):  
V. Ganni ◽  
S. Abramovich ◽  
T. V. V. R. Apparao
Keyword(s):  
Cryogenic System ◽  
Operating Modes

scholarly journals A simple method for short-term maintenance of neonatal mice without foster mothers

2020 ◽  
Vol 7 (1) ◽  
pp. 126
Author(s):  
Craig Kreikemeier-Bower ◽  
Pascal Polepole ◽  
Katherine Pinkerton ◽  
Luwen Zhang
Keyword(s):  
Short Term ◽  
Simple Method ◽  
Neonatal Mice ◽  
Foster Mothers ◽  
Term Maintenance

scholarly journals Neural Patterns in Linguistic Cortices Discriminate the Content of Verbal Working Memory

2019 ◽  
Vol 30 (5) ◽  
pp. 2997-3014 ◽  
Author(s):  
Benjamin Kowialiewski ◽  
Laurens Van Calster ◽  
Lucie Attout ◽  
Christophe Phillips ◽  
Steve Majerus
Keyword(s):  
Working Memory ◽  
Semantic Processing ◽  
Semantic Knowledge ◽  
Linguistic Knowledge ◽  
Long Term Memory ◽  
Short Term ◽  
Term Memory ◽  
Direct Activation ◽  
Term Maintenance

Abstract An influential theoretical account of working memory (WM) considers that WM is based on direct activation of long-term memory knowledge. While there is empirical support for this position in the visual WM domain, direct evidence is scarce in the verbal WM domain. This question is critical for models of verbal WM, as the question of whether short-term maintenance of verbal information relies on direct activation within the long-term linguistic knowledge base or not is still debated. In this study, we examined the extent to which short-term maintenance of lexico-semantic knowledge relies on neural activation patterns in linguistic cortices, and this by using a fast encoding running span task for word and nonword stimuli minimizing strategic encoding mechanisms. Multivariate analyses showed specific neural patterns for the encoding and maintenance of word versus nonword stimuli. These patterns were not detectable anymore when participants were instructed to stop maintaining the memoranda. The patterns involved specific regions within the dorsal and ventral pathways, which are considered to support phonological and semantic processing to various degrees. This study provides novel evidence for a role of linguistic cortices in the representation of long-term memory linguistic knowledge during WM processing.

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