scholarly journals Correlation Analysis of Runoff-Electricity Price-Load in Cascade Hydropower Spot Market

2021 ◽  
Vol 829 (1) ◽  
pp. 012008
Author(s):  
Zhu Yanmei ◽  
Zhang Shuai ◽  
Wang Jinlong ◽  
Huang Weibin ◽  
Chen Shijun
Keyword(s):  
Correlation Analysis ◽  
Spot Market ◽  
Electricity Price

scholarly journals Design of Distributed Electricity Trading Mechanism Based on Contract for Difference

2021 ◽  
Vol 256 ◽  
pp. 01030
Author(s):  
Li Long ◽  
Tianhai Yang ◽  
Qifen Li ◽  
Yongwen Yang ◽  
Lifei Song ◽  
...  
Keyword(s):  
Electricity Market ◽  
Spot Market ◽  
Electricity Price ◽  
Distributed Energy ◽  
Short Term ◽  
Gradual Improvement ◽  
Price Fluctuations ◽  
Financial Contract ◽  
Trading Mechanism ◽  
Price Demand

A contract for difference is a medium and long-term financial contract, which can be used in the electricity market to lock the electricity price in advance and avoid the risk of electricity price fluctuations in the spot market. The construction of the domestic power spot market has just started. With the release of relevant policies and the gradual improvement of the market structure, it is urgent to design a corresponding trading mechanism to ensure the smooth transition of the market. The current day-ahead transactions, real-time transactions and other short-term transactions for distributed power generation, on the one hand power load forecasting, electricity price demand response and other related technologies need to be further improved, on the other hand due to the randomness and uncertainty of distributed energy, participating in the short-term spot market has large price fluctuations, which is not conducive to the stability of the electricity market, and it is also not conducive to the consumption of distributed energy. Aiming at the above problems, this paper uses the characteristics of CFDs to restrain market power to design a distributed energy trading mechanism to achieve the purpose of energy saving and emission reduction.

scholarly journals A correlation analysis of the spot market prices of the Romanian electricity sector

2019 ◽  
Vol 14 (1) ◽  
pp. 150-162 ◽  
Author(s):  
Mihail Busu ◽  
Roxana ClodniȚchi ◽  
Manuela Liliana MureȘan
Keyword(s):  
Correlation Analysis ◽  
Electricity Markets ◽  
Weighted Average ◽  
Spot Market ◽  
Electricity Sector ◽  
Electricity Production ◽  
Energy Prices ◽  
Market Prices ◽  
Electricity Grids ◽  
Main Component

Abstract The energy sector is particularly important in the national economy as a whole, while the electricity sector is its main component. The developments in this area have strong economic and social repercussions. This article makes an overview of the electricity sector, illustrating the monthly evolution of consumption and production of instantaneous electricity in Romania in the past few years. Further on, the paper presents the monthly evolution of instantaneous consumption and production of electricity in Romania, the annual structure of electricity production and the depiction of some basic indicators of centralized electricity markets managed by OPCOM. The quantitative analysis presents the monthly evolution of weighted average prices on the competitive markets managed by OPCOM and a linear correlation analysis of the spot market prices in the Eastern European region. The conclusions of the article are in line with the research in the field and show that the electricity markets have registered important evolutions in Romania, both in terms of size and prices, evolutions based on both structural and behavioral factors. It also showed that spot market prices had relatively similar developments over the period analyzed in several countries in the region, with price correlations that seem to be even stronger as the interconnection of electricity grids is higher. Therefore, the results confirm the economic theory, namely that increasing the interconnection of electricity markets can lead to energy prices being brought closer, but also to mitigating the shocks affecting these markets.

Microdensitometer—computer correlation analysis of ultrastructural periodicity

1978 ◽  
Vol 36 (2) ◽  
pp. 32-33
Author(s):  
D.R. Ensor ◽  
C.G. Jensen ◽  
J.A. Fillery ◽  
R.J.K. Baker
Keyword(s):  
Correlation Analysis ◽  
Background Noise ◽  
Computer Control ◽  
Optical Diffraction ◽  
Screw Thread ◽  
Straight Line ◽  
Computer Storage ◽  
Correlation Process ◽  
Electron Microscope Image ◽  
Fixed Beam

Because periodicity is a major indicator of structural organisation numerous methods have been devised to demonstrate periodicity masked by background “noise” in the electron microscope image (e.g. photographic image reinforcement, Markham et al, 1964; optical diffraction techniques, Horne, 1977; McIntosh,1974). Computer correlation analysis of a densitometer tracing provides another means of minimising "noise". The correlation process uncovers periodic information by cancelling random elements. The technique is easily executed, the results are readily interpreted and the computer removes tedium, lends accuracy and assists in impartiality.A scanning densitometer was adapted to allow computer control of the scan and to give direct computer storage of the data. A photographic transparency of the image to be scanned is mounted on a stage coupled directly to an accurate screw thread driven by a stepping motor. The stage is moved so that the fixed beam of the densitometer (which is directed normal to the transparency) traces a straight line along the structure of interest in the image.

The German Strengths and Difficulties Questionnaire (SDQ)

2010 ◽  
Vol 26 (4) ◽  
pp. 256-262 ◽  
Author(s):  
Ulrike Petermann ◽  
Franz Petermann ◽  
Ina Schreyer
Keyword(s):  
Correlation Analysis ◽  
Teacher Ratings ◽  
Screening Instrument ◽  
Preschool Age ◽  
Strengths And Difficulties Questionnaire ◽  
Preschool Age Children ◽  
Discriminant Analyses ◽  
Strengths And Difficulties ◽  
Behavioral Attributes ◽  
And Behavior

The Strengths and Difficulties Questionnaire (SDQ) is a screening instrument that addresses positive and negative behavioral attributes of children and adolescents. Although this questionnaire has been used in Germany to gather information from parents and teachers of preschoolers, few studies exist that verify the validity of the German SDQ for this age. In the present study, teacher ratings were collected for 282 children aged 36 to 60 months (boys = 156; girls = 126). Likewise, teacher ratings were collected with another German checklist for behavior problems and behavior disorders at preschool age (Verhaltensbeurteilungsbogen für Vorschulkinder, VBV 3–6). Moreover, children’s developmental status was assessed. Evaluation included correlation analysis as well as canonical correlation analysis to assess the multivariate relationship between the set of SDQ variables and the set of VBV variables. Discriminant analyses were used to clarify which SDQ variables are useful to differentiate between children with or without developmental delay in a multivariate model. The results of correlation and discriminant analyses underline the validity of the SDQ for preschoolers. According to these results, the German teacher SDQ is recommended as a convenient and valid screening instrument to assess positive and negative behavior of preschool age children.

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