A New Analytical Approach To Calculate a Slippage inside a Progressing Cavity Pump with a Metallic Stator Using a Middle Streamline and a Structural Periodicity

SPE Journal ◽  
2021 ◽  
pp. 1-14
Author(s):  
Il Lyong Om ◽  
Un Chol Han ◽  
Song Il Ryo ◽  
Chun Yong Kim ◽  
Yong Nam Sol
Keyword(s):  
Analytical Approach ◽  
Mass Conservation ◽  
3D Models ◽  
Frictional Loss ◽  
Conservation Equations ◽  
Simplified Approach ◽  
Local Loss ◽  
Pump Flow Rate ◽  
Simplified Calculation ◽  
The Relationship

Summary Simplified and 3D models have been studied to predict the performance of progressing cavity pumps (PCPs). Simplified models were mainly made for metallic stator PCP performance. Their purpose was to represent the relationship between pump flow rate and differential pressure. Previous studies proposed to solve the system of mass conservation equations. In these studies, the geometry of the gap area was not clearly represented by neglecting the curvatures of stator and rotor. In addition, only frictional loss was considered, but local loss by gradual contraction or expansion of the gap area was not considered. In this study, we present a new analytical approach considering curvature and local loss. The depth of the gap area and local loss could be calculated analytically by a middle streamline and a curvature. On the basis of periodicity of distribution of cavities, simplified calculation for a slippage was possible without a system of mass conservation equations. Therefore, this model represents clearer geometry and a more simplified approach. The results show that this model shortens the calculating time and facilitates programing; in addition, the model validation is good in matching with experimental data.

3D genome structure reconstruction from chromosomal contact data

2017 ◽  
Author(s):  
◽  
Tuan Anh Trieu
Keyword(s):  
High Resolution ◽  
Genome Structure ◽  
Cell Types ◽  
3D Models ◽  
Graphic User Interface ◽  
Soft Constraints ◽  
Chromosome Conformation ◽  
3D Genome ◽  
Manual Adjustment ◽  
The Relationship

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Different cell types of an organism have the same DNA sequence, but they can function differently because their difference in 3D organization allows them to express different genes and has different cellular functions. Understanding the 3D organization of the genome is the key to understand functions of the cell. Chromosome conformation capture techniques like Hi-C and TCC that can capture interactions between proximal chromosome fragments have allowed the study of 3D genome organization in high resolution and high through-put. My work focuses on developing computational methods to reconstruct 3D genome structures from Hi-C data. I presented three methods to reconstruct 3D genome and chromosome structures. The first method can build 3D genome models from soft constraints of contacts and non-contacts. This method utilizes the concept of contact and non-contact to reconstruct 3D models without translating interaction frequencies into physical distances. The translation is commonly used by other methods even though it makes a strong assumption about the relationship between interaction frequencies and physical distances. In synthetic dataset, when the relationship was known, my method performed comparably with other methods assuming the relationship. This shows the potential of my method for real Hi-C datasets where the relationship is unknown. The limitation of the method is that it has parameters requiring manual adjustment. I developed the second method to reconstruct 3D genome models. This method utilizes a commonly used function to translate interaction frequencies to physical distances to build 3D models. I proposed a novel way to derive soft constraints to handle inconsistency in the data and to make the method robust. Building 3D models at high resolution is a more challenging problem as the number of constraints is small and the feasible space is larger. I introduced a third method to build 3D chromosome models at high resolution. The method reconstructs models at low resolution and then uses them to guide the reconstruction of models at high resolution. The last part of my work is the development of a comprehensive tool with intuitive graphic user interface to analyze Hi-C data, reconstruct and analyze 3D models.

الأمر بالعشرة بالمعروف في القرآن الكريم وأثره على العلاقات الأسرية

2021 ◽  
pp. arabic cover-english cover
Author(s):  
علي عبد العزيز سيور
Keyword(s):  
Analytical Approach ◽  
Family Relations ◽  
Good Practice ◽  
Family Relationship ◽  
Knowledge System ◽  
The Other ◽  
Legal Text ◽  
The Family ◽  
The Relationship ◽  
Shed Light

يجيب البحث عن إشكالية تتعلق بالعلاقات الأسرية من جهة الاحتكام للأعراف في النفقة والمسكن والملبس وغيرها، مما يترتب على ذلك خلافات تفضي ببعضها إلى المحاكم، وقد تنتهي بالطلاق. وقد هدف البحث إلى : 1 ـ تقديم منظومة معرفية متعلقة بدلالات العشرة بالمعروف من أجل الإسهام في إعادة تشكيل عقلية ناضجة للزوجين تضبط العلاقة بينهما عند الخلاف. 2 ـ تسليط الضوء على أبعاد وحدود المعروف نصًا والمعروف عرفًا في الأسرة. 3 ـ التأكيد على أن العشرة بالمعروف متبادلة بين كل من الزوج والزوجة، لا يقتصر هذا التكليف على واحد دون الآخر. وقد اعتمدت المنهج الاستقرائي عبر جمع الايات القرآنية ذات الصلة وذكر أقوال المفسرين والفقهاء، والمنهج التحليلي في فهم دلالات الألفاظ وتوجيهات المفسرين، والمنهج الاستنباطي بغية الوصول إلى ضوابط جامعة تخدم الهدف العام للبحث، وانتهى البحث إلى مجموعة من النتائج والتوصيات ومنها: اعتبار العرف الذي لا يخالف نصًا شرعيًا قاعدة من القواعد المعتبرة في ضبط العلاقات بين الزوجين. بشرط أن يقع تحت قدرة الزوج وطاقته، وأن يكون مما انتشر بين الناس، وينطبق على الأسرة مثله. القرآن الكريم ـ العشرة بالمعروف – العلاقة الأسرية – الحقوق بين الزوجين – العرف وأثره بين الزوجين. Summary The research answers a problem related to family relations in terms of resorting to customs in alimony, housing, clothing, and others...which results in disputes that may lead to some of them in the courts and may end in divorce. The aim of the research was to 1 - presenting a knowledge system related to the semantics of the good-natured in order to contribute to reshaping a mature mentality of the spouses that controls the relationship between them in the event of disagreement. 2 - and to shed light on the dimensions and limits of what is textually known and what is known by convention in the family. 3 - Emphasis on that good practice is mutual. Between both husband and wife, this assignment is not limited to one without the other. The inductive approach was adopted by collecting the relevant Qur’anic verses and mentioning the sayings of the commentators and jurists, the analytical approach in understanding the semantics of the words and the directives of the interpreters, and the deductive approach in order to reach comprehensive controls that serve the general objective of the research, and the research ended with a set of results and recommendations, including: Considering the custom that does not contradict A legal text is one of the considered rules in controlling relations between spouses. Provided that it falls under the husband’s ability and energy, and that it is something that has spread among people, and applies to the family like him. The Noble Qur’an - Ten Laws - Family Relationship - Rights between spouses - Custom and its effect between spouses.

Dämpfungsschlitze in Kreissägeblättern*/Parametric FE analysis to identify the mode of action of damping slots in circular saw blades

2015 ◽  
Vol 105 (01-02) ◽  
pp. 41-46
Author(s):  
C. Birenbaum ◽  
U. Heisel ◽  
S. Weiland
Keyword(s):  
Finite Element Analysis ◽  
Thermal Expansion ◽  
Analytical Approach ◽  
Simulation Models ◽  
Fe Analysis ◽  
Element Analysis ◽  
Annular Plates ◽  
Circular Saw ◽  
Characteristic Modes ◽  
The Relationship

In Kreissägeblättern werden zur Verminderung von Schwingungen und zum Ausgleich thermischer Dehnungen sogenannte Dehnungs- und Dämpfungsschlitze eingebracht. Die Wirkungsweise der Schlitze auf die dynamischen Eigenschaften besteht einerseits in der Dämpfungswirkung sowie andererseits in der Modifikation der Schwingungseigenformen. Um Wirkmechanismen und Optimierungsmöglichkeiten zu identifizieren, werden in den hier vorgestellten Untersuchungen mithilfe der Finiten-Elemente-Methode (FEM) Analysen von Kreisscheiben mit einfachen Schlitzkonfigurationen durchgeführt. Hierdurch sollen Zusammenhänge einzelner Schlitzparameter mit den statischen und dynamischen Eigenschaften von Kreissägeblättern aufgezeigt werden. Zur Validierung des entwickelten Simulationsmodells dienen analytische Berechnungen.   To reduce vibrations and adjust for thermal expansion, so-called damping slots and expansion slots are applied to circular saw blades. The slots affect the dynamic behavior of the saw blades by damping the vibration and altering the characteristic modes and frequencies. An FE(Finite Element) analysis of annular plates with simple arrangements of damping and expansion slots is performed to identify the mechanisms and improvement opportunities. This allows determining the relationship between slot parameters and the static and dynamic qualities of circular saw blades. The developed simulation models are validated using an analytical approach.

scholarly journals Internet Photogrammetry for Inspection of Seaports

2017 ◽  
Vol 24 (s1) ◽  
pp. 174-181 ◽  
Author(s):  
Zygmunt Paszotta ◽  
Malgorzata Szumilo ◽  
Jakub Szulwic
Keyword(s):  
Fundamental Matrix ◽  
Laser Scanning ◽  
3D Models ◽  
Digital Cameras ◽  
Correct Orientation ◽  
The Matrix ◽  
Transport Safety ◽  
Left And Right ◽  
Value Decomposition ◽  
The Relationship

Abstract This paper intends to point out the possibility of using Internet photogrammetry to construct 3D models from the images obtained by means of UAVs (Unmanned Aerial Vehicles). The solutions may be useful for the inspection of ports as to the content of cargo, transport safety or the assessment of the technical infrastructure of port and quays. The solution can be a complement to measurements made by using laser scanning and traditional surveying methods. In this paper the authors recommend a solution useful for creating 3D models from images acquired by the UAV using non-metric images from digital cameras. The developed algorithms, created and presented software allows to generate 3D models through the Internet in two modes: anaglyph and display in shutter systems. The problem of 3D image generation in photogrammetry is solved by using epipolar images. The appropriate method was presented by Kreiling in 1976. However, it applies to photogrammetric images for which the internal orientation is known. In the case of digital images obtained with non-metric cameras it is required to use another solution based on the fundamental matrix concept, introduced by Luong in 1992. In order to determine the matrix which defines the relationship between left and right digital image it is required to have at least eight homologous points. To determine the solution it is necessary to use the SVD (singular value decomposition). By using the fundamental matrix the epipolar lines are determined, which makes the correct orientation of images making stereo pairs, possible. The appropriate mathematical bases and illustrations are included in the publication.

scholarly journals PERAN KAUM MUSLIM TRADISIONALIS DALAM PEMBARUAN PENDIDIKAN ISLAM DI PALEMBANG PADA ERA KOLONIAL

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Ismail Ismail
Keyword(s):  
Analytical Approach ◽  
Point Of View ◽  
Islamic Education ◽  
Educational Institutions ◽  
Social Changes ◽  
Theoretical Assumption ◽  
Colonial Era ◽  
History Of ◽  
The Relationship

There have been a lot of studies on the history and development of Islamic education in Indonesia conducted by various groups. At least, there are three important aspects that should be noted in this study. First, from the aspect of the region, the history of Islamic education in South Sumatera which has never been comprehensively studied since the colonial era. Second, related to theoretical assumption, the question of whether the development of the system and the modern Islamic institution in Palembang during colonial era tend to be dominated by Muslim reformers or Muslim traditionalists. Third, from the point of view of methodology which tends to be descriptive and chronological, though recently there arises an analytical approach in which the system and the institution are not seen as things that can stand on their own, but are attached to social, religious, cultural, and political aspects. It is this approach which will be used in this study. Therefore, this study will try to look into the relationship between various social changes in Palembang and the system and Islamic educational institutions in the colonial era.

scholarly journals صورة الإسلام والمسلمين في وسائل الإعلام الغربية(الإعلاموفوبيا)

2020 ◽  
Vol 16 (1) ◽  
pp. 268-330
Author(s):  
د.عثمان محمد دفع الله علي القُرجي
Keyword(s):  
Analytical Approach ◽  
Western Civilization ◽  
Large Role ◽  
The West ◽  
Distorted Image ◽  
The Media ◽  
The Right ◽  
The Military ◽  
The Relationship ◽  
Western Media

The relationship between Islam and the West finds that this relationship has witnessed not only short periods of conflict and congestion, but often the military confrontation. Western societies have recently witnessed a wave of racist practices, forms of hostility and discrimination against Islam and Muslims, Under the name (Islamophobia)), , This fear is played by the Western media machine a large role has become the orientation of all strategies and plans to distort the image of Islam and Muslims, which is familiar with the term (al'iielamufubia), we find this research monitors many of what the Western media in the right of Islam and Muslims and the Prophet of Islam, And Muslims in the Western media (al'iielamufubia), and this research is of great importance in order to respond to the falsehoods and accusations that are attached to Islam, and to clarify the distorted image drawn in the West, by the Western media, the researcher followed in this study descriptive analytical approach to analyze issues And the implications of this phenomenon and the results of the work, and the questions of this study: How the influence of the media in shaping the Western consciousness? Who is behind the phenomenon of the media and this negative picture? , And the study has reached the results and the most important: The typical descriptions that are presented to Muslims in general in the Western media are like the adoption of extremism and violence and bloodshed and polygamy and rejection of integration and enemies of Western civilization, and ah Recommendations recommended by the study:, The comprehensive discourse that reaches all people, which stems from the universality of Islam, combines all the meanings of religion and covers all its aspects, does not set aside at the expense of one side, and does not care about without concern, but calls for religion as a whole contemporary discourse linking the original era.

Academic Engagement and Dropout Intention in Undergraduate University Students

2021 ◽  
pp. 152102512110636
Author(s):  
Pedro Ricardo Álvarez-Pérez ◽  
David López-Aguilar ◽  
María Olga González-Morales ◽  
Rocío Peña-Vázquez
Keyword(s):  
University Students ◽  
Academic Engagement ◽  
Analytical Approach ◽  
Preventive Measures ◽  
Drop Out ◽  
Dropping Out ◽  
Undergraduate University Students ◽  
The Relationship ◽  
Engagement Scale ◽  
Out Of School

The relationship between engagement and the intention to drop out was the focus of this research. Following an empirical–analytical approach, a sample of 1,122 university students responded to a questionnaire designed to measure the engagement and the intention to drop out of school. The results confirmed that undergraduates who considered dropping out had lower scores on the engagement scale. These data are relevant for the adoption of preventive measures against academic dropouts.

Fabricating concepts: using custom 3D models to teach abstract concepts

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jon McNaughtan ◽  
Ryan Litsey ◽  
Nichole Morelock
Keyword(s):  
Student Retention ◽  
3D Models ◽  
Abstract Concepts ◽  
Information Retention ◽  
Innovative Teaching ◽  
Teaching Innovation ◽  
Content Type ◽  
3D Objects ◽  
Quasi Experimental ◽  
The Relationship

PurposeMany scholars and practitioners have attempted innovative teaching practices in an effort to make complex ideas easier to comprehend and retain. The purpose of this study was to test the relationship between learning and the use of 3D models created to provide physical representations of abstract concepts students could hold and manipulate.Design/methodology/approachUsing a quasi-experimental design, we test both the students' initial comprehension of the concept and their retention of the information four weeks later when the course concluded.FindingsFindings included an initial boost in information retention and a likely increased retention of the information, showing promising trajectories for incorporating 3D objects to enhance teaching in the classroom.Originality/valueThis study provides a unique analysis of the use of 3D printing technology to illustrate abstract concepts. This teaching innovation provides another example of how technology can enhance and engage students through active learning. We find that this approach can increase student retention of material.

A Critical Analysis of Functional Assessment: Issues for Researchers and Practitioners

1996 ◽  
Vol 22 (1) ◽  
pp. 36-40 ◽  
Author(s):  
Robert A. Gable
Keyword(s):  
Behavioral Disorders ◽  
Functional Assessment ◽  
Critical Analysis ◽  
Analytical Approach ◽  
Treatment Decisions ◽  
Emotional Behavioral Disorders ◽  
Target Behavior ◽  
Behavior Strategies ◽  
The Relationship ◽  
Direct Measures

This article addresses the use of an analytical approach to making treatment decisions known as functional assessment. The usefulness of functional assessment with students with emotional/behavioral disorders is predicated on the assumption that the effectiveness of treatment increases if it matches the function of the target behavior(s). Discussion covers both indirect and direct measures of the relationship between the target behavior and variables that may be maintaining the behavior. Strategies for selecting and verifying hypothesis-driven treatment decisions are presented. In that the accumulated research has failed to dislodge some stumbling blocks to the use of functional assessment, several methodological solutions are offered for researchers and practitioners.

scholarly journals Calibrating the Micromechanical Parameters of the PFC2D(3D) Models Using the Improved Simulated Annealing Algorithm

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Min Wang ◽  
Ping Cao
Keyword(s):  
Numerical Simulation ◽  
Simulated Annealing ◽  
3D Model ◽  
Simulated Annealing Algorithm ◽  
3D Models ◽  
Calibration Process ◽  
Bond Model ◽  
Physical Experiments ◽  
Annealing Algorithm ◽  
The Relationship

PFC2D(3D) is commercial software, which is commonly used to model the crack initiation of rock and rock-like materials. For the PFC2D(3D) numerical simulation, a proper set of microparameters need to be determined before the numerical simulation. To obtain a proper set of microparameters for PFC2D(3D) model based on the macroparameters obtained from physical experiments, a novel technique has been carried out in this paper. The improved simulated annealing algorithm was employed to calibrate the microparameters of the numerical simulation model of PFC2D(3D). A Python script completely controls the calibration process, which can terminate automatically based on a termination criterion. The microparameter calibration process is not based on establishing the relationship between microparameters and macroparameters; instead, the microparameters are calibrated according to the improved simulated annealing algorithm. By using the proposed approach, the microparameters of both the contact-bond model and parallel-bond model in PFC2D(3D) can be determined. To verify the validity of calibrating the microparameters of PFC2D(3D) via the improved simulated annealing algorithm, some examples were selected from the literature. The corresponding numerical simulations were performed, and the numerical simulation results indicated that the proposed method is reliable for calibrating the microparameters of PFC2D(3D) model.

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