scholarly journals Optimization method of microwave drying process parameters for rice

2021 ◽  
Vol 13 (3) ◽  
pp. 10-20
Author(s):  
Tongsheng Sun ◽  
Fangqing Ling
Keyword(s):  
Process Parameters ◽  
Optimization Method ◽  
Microwave Drying ◽  
Drying Process ◽  
Grey Correlation ◽  
Vacuum Degree ◽  
Head Rice ◽  
Correlation Degree ◽  
Grey Correlation Degree ◽  
Main Factor

In this work, the optimal process to improve the efficiency of microwave drying of rice is studied. The optimal conditions for reducing the crack rate and improving the head rice rate are analyzed according to the principle of the orthogonal experiment. The optimization method of the rice microwave drying process parameters is proposed to simultaneously consider the two indicators, namely, crack and head rice rates, based on the grey system theory. The grey correlation degree analysis is carried out on the process conditions of the microwave drying rice. The result shows that the main factor affecting the integrity rate of the rice grain is the vacuum degree, and the main factor affecting the crack rate is the loading density. The grey correlation degree curve of head rice and crack rate fluctuates greatly, and the correlation between the two indexes is high. According to the grey correlation degree, the optimal parameters are microwave power of 500 W, vacuum degree of 0.02 MPa, and loading density of 1289.89 kg/m3. The head rice and crack rate are both optimized when drying under the parameters. The results provide a guiding method for the study of the correlation degree between drying indexes and provide a method basis for the further selection of the best drying process.

scholarly journals Research on Clearing Model of Long-Term Transaction Considering Matching Degree between Generation and Load

2020 ◽  
Vol 165 ◽  
pp. 06033
Author(s):  
Zhang Lin ◽  
Zhang Qinghe ◽  
Zhang Xue ◽  
Gao Hui
Keyword(s):  
Similarity Analysis ◽  
Load Curve ◽  
Market Clearing ◽  
Grey Correlation ◽  
Correlation Degree ◽  
New Energy ◽  
Matching Degree ◽  
Flexible Load ◽  
Grey Correlation Degree

With the development of new energy and flexible load, there are many kinds of power and load characters in the power grid. It’s necessary to considerate the similarity between generation output and load when it’s market clearing. First, similarity analysis of generation-load curve based on the grey correlation degree is introduced, correlation between power generation enterprises and power users can be calculated. Then, market clearing model is built. market clearing mechanism is set which considering the matching degree between generation and load. The technological process of market clearing is given. Last, the effectiveness of the proposed clearing model is verified by an example.

A Model of Weight Absolute Grey Correlation Degree for the Transformer Bushing State Assessment

2013 ◽  
Vol 345 ◽  
pp. 507-510
Author(s):  
Rong Gu ◽  
Jin Sha Yuan ◽  
Fei Lv
Keyword(s):  
Correlation Coefficients ◽  
State Assessment ◽  
The State ◽  
Condition Based Maintenance ◽  
Normal Operation ◽  
Power Equipment ◽  
Accurate Assessment ◽  
Grey Correlation ◽  
Correlation Degree ◽  
Grey Correlation Degree

Accurate assessment for the operational status of the transformer bushing is not only a prerequisite for the implementation of condition-based maintenance, but also to ensure the normal operation of the transformer and the whole power equipment conditions. In the paper, a model of weight absolute grey correlation degree was used to assess the transformer bushing state. Firstly, determined the assessment indicators and handled them. Secondly, the weights, correlation coefficients and each association were calculated. Thirdly, to compare the largest association of assessment indicators in grades as the transformer bushing final run state. Finally, give the state assessment results, according to the remark set. The result shows the model works well.

Dynamic Change Analysis of Grain Yield and Factors Based on Gray System in Northern Anhui Province

2012 ◽  
Vol 599 ◽  
pp. 934-937
Author(s):  
Hai Min Su ◽  
Ai Xia He
Keyword(s):  
Grain Yield ◽  
Development Strategy ◽  
Dynamic Change ◽  
Anhui Province ◽  
Net Income ◽  
Grey System ◽  
Change Analysis ◽  
Grey Correlation ◽  
Correlation Degree ◽  
Grey Correlation Degree

Considering some grain yield conditions of China, we considered that grain yield security in particular regard the sustainable development strategy is a pivotal position. Based on the statistical data from 1991 to 2010, grain problem in Northern Anhui Province is discussed in three aspects. With the help of the theory and method of grey system we found: The grain per unit area yield was primary element of grain yield, whose grey correlation degree was sort in the first; The grain-sown area and water conservancy facilities were main factors of which grey correlation degrees were respective sort in the second and third; However, the influence of natural disaster and net income of farmer per capita should not be ignored.

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