scholarly journals Study on Structural Parameters and Analysis Method of Soil Successive Impulse Discharge Channel

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 877
Author(s):  
Donghui Luo ◽  
Yongxing Cao ◽  
Yu Zhang ◽  
Shijun Xie ◽  
Chenmeng Zhang ◽  
...  

The transient analysis model of grounding systems is an important tool to analyze the lightning characteristics of grounding devices. When lightning enters the soil through the grounding device, there is a centralized discharge channel. The spatial structure of the discharge channel in the soil has a great effect on the accuracy of the transient analysis model of the soil impulse discharge. In this paper, based on the gray information analysis method, the volume of successive impulse discharge channels in the ground under various currents and soil conditions is calculated, and the changing law with time interval is analyzed. According to the experimental results, an analysis method of the model considering the discharge channel structure is proposed, and an example is analyzed. The results show that the time interval has an effect on the volume of the discharge channel. In a certain range, the volume of the channel increases with the time interval of successive impulse discharges. Taking the critical breakdown electric field strength as the judgment condition and the residual resistivity as the variable, the development process of the discharge channel can be simulated. The calculated results of the model are close to the experimental results.

2020 ◽  
Vol 10 (2) ◽  
pp. 60-74
Author(s):  
Muhammad Syauqi Mubarok

This article aims to examine and describe the influence of guidance and counseling management on learning discipline. The method used in this research is descriptive analysis method using survey techniques. Data collection techniques that used are documentation studies and field studies. Moreover, the data analysis technique that has been used to answer the research hypothesis is statistical analysis with a path analysis model. The location of the study was at the Ciledug Vocational High School Al-Musaddadiyah Garut, with 85 respondents taking part in the survey. The results of the discussion show that guidance and counseling management has a positive and significant effect on the discipline of learning


2011 ◽  
Vol 50-51 ◽  
pp. 728-732
Author(s):  
Ping Li ◽  
Ming Ying Zhuo ◽  
Li Chao Feng ◽  
Rui Zhang

Non-performance loan ratio is one of the important assessment criteria of the security of credit assets. It is also an important financial indicator to evaluate the general strength of commercial banks. Using principal component analysis method and statistical software SPSS16.0 and based on the non-performance loan ratio and relative data of some commercial banks in China in 2007, this paper provided a principal component analysis model for the non-performance loan ratio of China’s commercial banks. The factors that affect the non-performance loan ratio were refined in this paper. Finally, the characteristics of effect factors of each bank were analyzed and compared in detail.


2015 ◽  
Vol 12 (04) ◽  
pp. 1540006 ◽  
Author(s):  
C. Jiang ◽  
J. Zheng ◽  
B. Y. Ni ◽  
X. Han

This paper proposes a probability-interval mixed uncertainty model considering parametric correlations and a corresponding structural reliability analysis method. First of all, we introduce the sample correlation coefficients to express the correlations between different kinds of uncertain variables including probability and interval variables. Then dependent parameters are transformed into independent ones through a matrix transformation. A reliability analysis model is put forward, and an efficient method is built to obtain the reliability index or failure probability interval of the structure. Finally, four numerical examples are provided to verify the validity of the method.


2013 ◽  
Vol 732-733 ◽  
pp. 52-56
Author(s):  
Zhi Guo Wang ◽  
Lei Zhang ◽  
Chai Ling Yin

Cryogenic separation method is the main method to recycle NGL (Natural Gas Liquid). Oilfield two-stage expansion NGL cryogenic separation plant is a complex system composed of varieties of material flow, energy flow and equipments, is a typical distributed energy use system composed of three parts, energy supply, energy use and waste heat recovery. In this paper, according to the process characteristics of two-stage expansion cryogenic separation plant, three-box analysis method was used, the system was compartmentalized into six subsystems, represented the exergy analysis model of system—unit—equipment, given the specific analysis process and the assessment rules for the NGL system. Using the practical operational data, the writers conduct the exergy analysis on the operational working condition of Daqing oilfield NGL system. Based on the calculation results, this paper raises some proposals to improve the operational efficiency, and achieved a good energy saving effect in engineering practice.


2011 ◽  
Vol 211-212 ◽  
pp. 384-388
Author(s):  
Gui Mei Guo ◽  
Lin Hong

Sight-stabilizing mechanisms controlled by diaphragm springs and other damping elements is an important subordinate system of airborne sight stabilizing System. The performances of sight-stabilizing system depend on the characteristics of kinematics and dynamics of the system in a great extent. Among various external moments acting on the rod of the manipulator, such as those moments caused by damper, positioning spring, and restoration spring, the forces by diaphragm springs are most obvious. According to the structure form and motion peculiarity, the rod can be equivalent to a rigid body turning around a fix point. Simulation results reveal that the moment of the restoration spring to the rod is proportional to the angular displacement, and that the moment is the most prominent factor influencing the operating performances among all these moments. Through reasonable adjustments of structural parameters of the restoration spring, the performances of the sight-stabilizing system can be improved greatly; the analysis method provides a basis for guiding the design of concerned structural parameters of sight-stabilizing system.


Author(s):  
Dr. C. Arunabala ◽  
P. Jwalitha ◽  
Soniya Nuthalapati

The traditional text sentiment analysis method is mainly based on machine learning. However, its dependence on emotion dictionary construction and artificial design and extraction features makes the generalization ability limited. In contrast, depth models have more powerful expressive power, and can learn complex mapping functions from data to affective semantics better. In this paper, a Convolution Neural Networks (CNNs) model combined with SVM text sentiment analysis is proposed. The experimental results show that the proposed method improves the accuracy of text sentiment classification effectively compared with traditional CNN, and confirms the effectiveness of sentiment analysis based on CNNs and SVM


2018 ◽  
Vol 17 (1) ◽  
pp. 71-86
Author(s):  
Mohd Anuar Ramli ◽  
Ahmad Badri Abdullah ◽  
Muhammad Ikhlas Rosele

Islamic jurisprudence is a dynamic system. It is facilitated by some flexible methodologies. Nowadays, there are varieties of issues in Muslims’ societies that are results or implications of developments in science and technology, and also results of changes that happen in the structures of the societies. In order to face these realities, a contemporary integrative approach has to be applied in Islamic Law's research process. In accordance to this, this paper will elaborate the integrative approaches that try to unify and integrate theories in Islamic jurisprudence with social research methods. Basically, there are models that have been introduced by several Islamic thinkers that related to this integrative approach. For example the Islamization of sociology based on maslahah model, the Islamic Jurisprudence sociology model, the unified approach to textual and contextual analysis model. All of these models contain their own strength and weakness in their integrative approaches. This paper is trying to introduce an approach that integrates Islamic jurisprudence theories with the gender analysis method that is among social critics methods. This introduced method is to be used to analyze an issue in fiqh pertaining to polygamy that is always been debated nowadays and also to analyze the applicability of the practice in the social and contemporary conditions of our country. According to this research, social research methods are able to support Islamic jurisprudence in order to improve its research process and its results. Keywords: integrative approach, Islamic jurisprudence, social science, gender analysis, polygamy   Hukum Islam merupakan satu sistem dinamik yang dibangunkan berasaskan metodologi yang bersifat anjal. Pada hari ini, wujudnya pelbagai isu yang melanda masyarakat umat Islam kesan daripada perkembangan sains dan teknologi serta perubahan sosial yang berlaku dalam struktur masyarakat. Dalam usaha untuk berdepan dengan realiti ini, pendekatan integratif yang bersifat kontemporari perlu digunakan dalam proses penyelidikan hukum Islam. Justeru, artikel ini akan menjelaskan pendekatan integratif yang cuba menyatukan dan mengintegrasikan teori hukum Islam dengan kaedah penyelidikan sosial. Pada asasnya, terdapat model yang telah diperkenalkan oleh beberapa pemikir Islam berkaitan dengan pendekatan integratif ini. Sebagai contoh Islamisasi ilmu sosiologi berdasarkan model maslahah, model model sosiologi hukum Islam, model pendekatan bersepadu dalam analisis tekstual dan kontekstual. Semua model ini mengandungi kekuatan dan kelemahan dalam pendekatan integratif yang tersendiri. Lantaran itu, kajian ini cuba memperkenalkan satu pendekatan yang mengintegrasikan teori hukum Islam dengan kaedah analisis gender yang merupakan salah satu metodologi kritik sosial. Kaedah ini diperkenalkan untuk digunakan dalam menganalisis isu fiqh berkaitan poligami yang sentiasa menjadi perbahasan pada masa kini serta melihat kesesuaiannya dalam konteks sosial dan kemodenan negara ini. Kajian mendapati, kaedah penyelidikan sosial dapat menyokong kajian hukum Islam dalam usaha meningkatkan kualiti proses penyelidikan dan hasil dapatannya.   Kata kunci: Pendekatan integratif; hukum Islam; sains sosial; analisis gender; poligami


Author(s):  
Gang Zhang

In English teaching, grammar is a very important part. Based on the seq2seq model, a grammar analysis method combining the attention mechanism, word embedding and CNN seq2seq was designed using the deep learning algorithm, then the algorithm training was completed on NUCLE, and it was tested on CoNIL-2014. The experimental results showed that of seq2seq+attention improved 33.43% compared to the basic seq2seq; in the comparison between the method proposed in this study and CAMB, the P value of the former was 59.33% larger than that of CAMB, the R value was 8.9% larger, and the value of was 42.91% larger. Finally, in the analysis of the actual students' grammar homework, the proposed method also showed a good performance. The experimental results show that the method designed in this study is effective in grammar analysis and can be applied and popularized in actual English teaching.


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