scholarly journals Recognition of Station Topology Based on Power Conservation

CONVERTER ◽  
2021 ◽  
pp. 689-696
Author(s):  
Yulu Cai Et al.
Keyword(s):  
Real Data ◽  
Current Data ◽  
Power Conservation ◽  
Convex Optimization Problem ◽  
Relationship Model ◽  
Transformation Methods ◽  
Relationship Of ◽  
The Mathematical Model ◽  
The Relationship ◽  
Model Algorithm

Aiming at the problems of the confusion of user meter data in the distribution network and the difficulty in identifying the relationship, a creative method of identifying the topological structure of the station based on the conservation of current and energy is proposed. Through the calculation of the current data relationship, a mathematical relationship model based on energy conservation is established for the topological scene of the station. After constructing the mathematical model, through a series of transformation methods, the model is transformed into a convex optimization problem. By solving the model, the topological relationship of the station is finally obtained. Through the experimental verification and analysis of real data, the model algorithm proposed in this paper has higher accuracy and higher efficiency than manual screening, and has deeper research value.

Organization of electricity and capacity supplies: experience and practice of reforms in a particular region

2021 ◽  
pp. 92-103
Author(s):  
Alexandra Vasilyevna Yashchenko
Keyword(s):  
Power Supply ◽  
Electric Power Industry ◽  
Real Data ◽  
General Concept ◽  
Network Problems ◽  
Market Transformation ◽  
Separate Region ◽  
Supply Industry ◽  
Relationship Of ◽  
The Relationship

The article examines the process of formation of the power supply industry in the 2000s using the example of a separate region. The market transformation of RAO UES was carried out under the slogan of increasing the efficiency and reliability of interaction between the economy and the energy sector. However, in practice, the creation of the energy market faced many problems, the specifics of the “special product” electricity, network problems, institutional and other problems. On the example of the Altai Territory, the genesis of the territorial power supply system is shown within the framework of the general concept of market reform of the electric power industry. On the basis of real data of the supplier of last resort and the real consumer of electricity and capacity, a retrospective of the relationship of these entities in practice is shown. The dynamics of the average price for electricity is calculated and its quite significant growth is shown for the entire post-reform period of observations.

Study on High Frequency Hydraulic Exciter Based on Rotary Valve Control

2012 ◽  
Vol 490-495 ◽  
pp. 1441-1445 ◽  
Author(s):  
Jian Zhuo Zhang ◽  
Li Zhe Guan ◽  
Kang Kang Li
Keyword(s):  
Mathematical Model ◽  
High Frequency ◽  
Rotary Valve ◽  
Exciting Frequency ◽  
Working Principle ◽  
Relationship Of ◽  
The Mathematical Model ◽  
The Relationship ◽  
Valve Control

A kind of hydraulic exciter based on rotary valve control was studied in this paper, the composition of the exciter and its working principle were introduced, and the mathematical model of the system was established. The characters of the system were simulated using MATLAB. From the results of the simulation, we get the relationship of the amplitude of Vibration oil cylinder between the system’s pressure and the exciting frequency. The results can provide theoretical bases to design the hydraulic exciter.

Shaping Law and Motion Design in NC-ECM under Effect of Twiste Angle

2011 ◽  
Vol 128-129 ◽  
pp. 1010-1014
Author(s):  
Rui Wu ◽  
Dan Wen Zhang ◽  
Juan Sun
Keyword(s):  
Mathematical Model ◽  
Electrochemical Machining ◽  
Experimental Results ◽  
Working Face ◽  
Relationship Of ◽  
The Mathematical Model ◽  
The Relationship ◽  
Motion Design

The twiste angle has a great effect on shaping law and stability of Numerical Controlled Electrochemical Machining (NC-ECM) process. In order to avoid the disadvantages caused by twiste angle, a methode of study shaping law by dispersing cathode working face in NC-ECM was proposed, and a mathematical model of the shaping law with the effects of twiste angle has been established in this paper. The mathematical model disclosed the relationship of twiste angle β, feeding velocity vf and thickness of removal material h in NC-ECM. Theoretical and experimental results show the the mathematical model of shaping law described in this paper can be considered as a useful reference and is helpful for the analysis of the NC-ECM and general ECM process.

Research on the Choice and Control of Angle Parameter while Throwing Shot Put Based on Kinematics and Dynamics

2013 ◽  
Vol 427-429 ◽  
pp. 497-501
Author(s):  
Bao Zhai Li ◽  
Feng Yan Jiang ◽  
Zhen Xu
Keyword(s):  
Mathematical Model ◽  
Scientific Change ◽  
Initial Speed ◽  
Related Data ◽  
Relationship Model ◽  
Release Height ◽  
The Mathematical Model ◽  
The Relationship ◽  
Shot Put ◽  
Angle Parameter

For the shot put movement, in throwing process the factors that affetc the result mainly have shot put action, athletes final exertion, athletes initial speed of throwing, athletes release height and shot-putting angle and so on. And this paper had a research on the choice of angle parameter of release in throwing process that affected the result of throwing shot put in the circumstances of certain initial speed of throwing and release height.The first it had built mathematical modeling of motion trajectory in the process of throwing the shot put, it analyzed the relationship model of the initial speed of throwing, release height and shot-putting angle. Secondly it understood that the scientific change of throwing angle can significantly improve the shot put throwing performance from the relationship model in the circumstances of certain initial speed of throwing and release height. This article was based on the research of angle parameter of throwing the shot put to provide a theoretical basis of the angle parameter of throwing the shot put of domestic shot-putter in peacetime training and competition. And the related data from the game and training of domestic excellent shot-putter was combined with the mathematical model to test and verify the rationality of the mathematical model and provide the scientific guarantee for domestic shot put movement to raise the level of sports.

scholarly journals Stepwise Relationship of Exercise Frequency with Serum BDNF Level among Adolescents

2020 ◽  
Author(s):  
Mahmoud Alomari ◽  
Omar F. Khabour
Keyword(s):  
Current Data ◽  
Dose Effect ◽  
Brain Health ◽  
Bdnf Level ◽  
Vigorous Exercise ◽  
Exercise Frequency ◽  
Exercise Participation ◽  
Relationship Of ◽  
The Relationship ◽  
Serum Bdnf

Introduction: Regular participation in exercise in adolescents is associated with numerous health benefits, including improved CV, metabolic, muscular, respiratory, immune, cognitive, and neurohormonal functions. Brain-derived neutrophic factor (BDNF) is essential for several body functions, particularly the neural and cognitive functions. However, the dose-effect of exercise participation on BDNF is not fully understood among adolescents. The current study examined the relationship of serum BDNF level with moderate/vigorous exercise frequency in 703 adolescents aged 13-17 years old. Methodology: ELISA was used to evaluate serum BDNF. Additionally, the SALSA questionnaire was used to obtain the weekly frequency of moderate/vigorous exercise. Results: The ANOVA revealed differences (p=0.001) in BDNF level according to running frequency. Subsequent posthoc analysis showed that BDNF was greater (p<0.05) in adolescents participating three, four, five, six, and seven versus no and one day of exercise. Furthermore, no differences (p>0.05) were found in BDNF between exercising three, four, five, six, and seven days/week. Conclusion: The current data revealed stepwise differences in BDNF between running frequencies, peaking at five days/week. These differences in BDNF seems to plateau when participating more than three days/week. The results confirm the importance of exercise for brain health and are consistent with the current recommendations for moderate/vigorous exercise frequency.

scholarly journals Angiotensin II and COVID-19. Secrets of interactions

2020 ◽  
Vol 25 (4) ◽  
pp. 3861 ◽  
Author(s):  
A. O. Konradi ◽  
A. O. Nedoshivin
Keyword(s):  
Angiotensin Ii ◽  
Enzyme Inhibitors ◽  
Renin Angiotensin System ◽  
Angiotensin Converting Enzyme Inhibitors ◽  
Current Data ◽  
Angiotensin Ii Receptor ◽  
Converting Enzyme Inhibitors ◽  
Receptor Blockers ◽  
Relationship Of ◽  
The Relationship

The article describes current data on the relationship of renin-angiotensin system and related drugs with the risk of COVID-19 infection and its outcomes. Analysis of the latest publications did not reveal association of angiotensin-converting enzyme inhibitors and angiotensin II receptor blockers with any risk of an unfavorable outcomes, and there was no data for withdrawal of these drugs.

scholarly journals The Implications of Village Regulation toward the Dualism of Local Leadership Dynamics

2020 ◽  
Vol 4 (1) ◽  
pp. 39
Author(s):  
I Nyoman Subanda ◽  
I Nyoman Budiana ◽  
A.A.Ngr Eddy Supriyadinata Gorda
Keyword(s):  
Rural Communities ◽  
Local Level ◽  
Group Discussion ◽  
Local Leadership ◽  
Leadership Process ◽  
Relationship Model ◽  
Coordination System ◽  
Relationship Of ◽  
The Relationship ◽  
Local Leaders

The transformation of local leadership in Bali has implications for the emergence of various phenomena of the relationship of desa dinas (the official administrative village) and desa adat (the customary village) which both have autonomous rights. The authority of desa adat and desa dinas coincides with each other. With these conditions, various potential conflicts, poor communication patterns, and overlapping authority are very likely to occur at the local level. In this study, several issues will be discussed, namely: What is the model and process of transformation in local leadership especially in desa adat in Bali? What is the process and form of negaranisasi in local leadership especially in desa adat in Bali? What are the competencies and roles of local leaders in the local leadership process in Bali? What are the roots, the causes and solutions in handling horizontal conflicts in local leadership in Bali? Data were collected by interview, documentation and focus group discussion method to obtain sufficient data variance and validity. Furthermore, the data were analyzed qualitatively using interactive models from Miles and Huberman. The results of the study can be described, that the synergy of two (2) types of local leadership is needed. The capacity and competence of village officials and prajuru adat (customary officials) are obliged to be enhanced, strengthened and empowered, so that they are able to adapt in handling various problems that arise in rural communities in the era of modernization and globalization. For this reason, it is needed to build a synergic relationship model and leadership coordination system between desa dinas and desa adat, a model for developing the capacity and competency of village officials and prajuru adat, and developing a model for handling conflicts that have increasingly intense.

scholarly journals Model of relationship of transformational leadership and university management

DYNA ◽  
2019 ◽  
Vol 86 (210) ◽  
pp. 9-16
Author(s):  
Zahira Moreno Freites ◽  
Giovanni Pérez Ortega
Keyword(s):  
Transformational Leadership ◽  
Multiple Regression Model ◽  
University Management ◽  
Four Dimensions ◽  
Relationship Model ◽  
The One ◽  
The University ◽  
Relationship Of ◽  
Global Indicator ◽  
The Relationship

We propose to find the model of relationship between Transformational Leadership and university management. The Inventory of Leadership Practices form was used (LPI) and an University Management (UG) scale, which consists of four dimensions: Research , Teaching, Extension and Support , which were applied to managers of 31 universities in Colombia.For method for identifying the relationship model between global indicator university management and dimensions associated with transformational leadership a multiple regression model was developed, furthermore, in order to eliminate subjectivities we utilized the transformation test of ordinal scales in a new scale Type Ridit until reaching the results.Among the main findings, we find that there is a model of direct and positive relationship between the Transformational Leadership and the University Management, and that the Enabling dimension to act in Transformational Leadership is the one which has the greatest impact in the management.

Investigation on Silicon-Glass Electrostatic Bonding Time Experiment

2011 ◽  
Vol 483 ◽  
pp. 78-82
Author(s):  
Xiao Wei Liu ◽  
Jia Lu Tang ◽  
Rong Yan Chuai ◽  
Hai Feng Zhang ◽  
Xi Lian Wang
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Thermal Expansion ◽  
Coefficient Of Thermal Expansion ◽  
Bonding Process ◽  
Bonding Time ◽  
Relationship Of ◽  
The Mathematical Model ◽  
The Relationship ◽  
Electrostatic Bonding

In this paper, we make a detail analysis of some factors, which affects the electrostatic bonding process. According to the electrical properties of glass, combined with the principle of electrostatic bonding, we analysed the relationship of critical bonding time, voltage and temperature as well as the factors which affect electrostatic bonding. Then we come up with the mathematical model of the intensity and temperature of electrostatic bonding. In accordance with the above-mentioned formula and the experimental data, we can get the following conclusions: the intensity of electrostatic bonding is much greater between 280°C to 370°C; the best temperature for this bonding is about 350°C; however, when the temperature is below 280°C,the intensity of electrostatic bonding is lower due to the great impact of particles under low temperature; but when the temperature is higher than 370°C,the mismatch of coefficient of thermal expansion of silicon and glass gets larger, then as a result, the intensity of this bonding has a significant decrease with the increasing of temperature.

Effect of cutting width on the optimum size of bars and boards when cutting sawlogs with sawing three bars of equal thickness and four pairs of side boards

10.12737/4517 ◽  
2014 ◽  
Vol 4 (2) ◽  
pp. 128-135 ◽  
Author(s):  
Агапов ◽  
Aleksandr Agapov
Keyword(s):  
Mathematical Model ◽  
Objective Function ◽  
Optimality Criterion ◽  
Constraint Equations ◽  
First Pass ◽  
Method Of Lagrange Multipliers ◽  
Relationship Of ◽  
The Mathematical Model ◽  
The Relationship ◽  
Equal Thickness

There is a task of cutting optimization of sawlogs considering the width of cut. Output of sawn timber produced after the first pass of cutting sawlogs is chosen as optimality criterion. The objective function is represented as the sum of the cross-section of bars and planks. Such a mathematical model of the objective function establishes a relationship between size of bars and planks. Constraint equations represent the relationship of sawlogs diameter with the size of bars and boards, as well as the width of the cut. To solve the mathematical model the method of Lagrange multipliers is used.

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