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Author(s): 

Sangeetham Dharuman Lalitha | Gunasekaran Anitha | Vellivel Parimala | Athi Narayanasamy Muthukrishnan

Issue Info: 
  • Year: 

    2025
  • Volume: 

    44
  • Issue: 

    5
  • Pages: 

    1458-1481
Measures: 
  • Citations: 

    0
  • Views: 

    16
  • Downloads: 

    0
Abstract: 

The reliability of fault diagnosis and the stability of electrical grids demand accurate analysis of Key Chemical Gases in power transformer oil. DGA, which quantitatively measures concentrations of critical Chemical Gases, is still a cornerstone technique in the field, but is infamous for its interpretative complexity: the correlation between gas levels and specific fault types is too complex. The proposed methodology in this study attempts to integrate the strengths of traditional methods of DGA interpretation along with the power of a machine learning model, specifically a Random Forest algorithm. The process comprises the preprocessing of DGA data to extract meaningful Chemical features from them further developing the model using machine learning to classify the different kinds of faults based upon those Chemical features. This approach has been validated on multiple scenarios for the data coming from DGA transformer faults after a lot of testing. Results show that this method delivered an average accuracy of 95.86% for three types of faults and 93.67% for the same types of faults with varying conditions. For six types of faults, the delivery was placed at an average accuracy and consistency of 88.85% and 87.47%, respectively. This approach significantly shows improved performance in the traditional methods of diagnostics while promising much more accurate fault detection. In addition to enhanced diagnostic accuracy, it supports proactive, hence preventive, maintenance strategies, resulting in improved system efficiency and reduced downtime. The paper details a technique that combines Chemical data analysis with machine learning, from which distinct solutions can be conceived to address the complex challenges facing industries.

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Journal: 

Issue Info: 
  • Year: 

    0
  • Volume: 

    21
  • Issue: 

    84
  • Pages: 

    294-296
Measures: 
  • Citations: 

    0
  • Views: 

    189
  • Downloads: 

    0
Abstract: 

ارزیابی و سنجش استدلال بالینی (Clinical Reasoning) یکی از مهم ترین وظایف دانشکده های پزشکی در اکثر نقاط جهان است. چندی است آزمون های استدلال بالینی در کشور ما هم مورد توجه قرار گرفته است و در آزمون های رسمی به کار گرفته می شود. مشاهده شده است در برخی مقالات و فرم های ارزشیابی دانشگاهی به Key Features (KF) و Key Feature Problems (KFPs) به تنهایی و یا در کنار هم اشاره شده است و این پرسش را پیش کشیده است که این دو چه تفاوتی با هم دارند. از این رو بر آن شدیم که پاسخ به این پرسش را در قالب این نوشتار کوتاه بیاوریم. استدلال بالینی دربرگیرنده ی فرایندهای شناختی (Cognitive) است که در طبابت (Clinical Practice) رخ می دهند، مانند تشخیص، درمان، تدبیر و پیش آگهی. فرآیند استدلال بالینی با جمع آوری اطلاعات آغاز می شود. پس از آن پزشک با افزودن تجارب و دانش خود برای حل مسأله طرحی می ریزد و دست به انجام مداخلاتی می زند. لازم به ذکر است که استدلال بالینی مفهومی وسیع است که شامل تصمیم گیری بالینی و حل مسأله هم می شود اما منحصر به آن نیست(1). مطالعات تجربی نشان داده اند استدلال بالینی مهارت عام (General) و جهانشمول (Universal) نیست که بتوان آن را در حل هر مسأله بالینی به کار گرفت، بلکه مهارتی است مختص به مورد (Case) یا مسأله بالینی که در صدد حل آن هستیم. به این پدیده وِیژه بود مسأله (Problem Specificity) یا ویژه بود زمینه و محتوا (context and content specificity) می گویند(2). بورداژ و پیج (Page و Bordage) برای اولین بار مفهوم مؤلفه های کلیدی (KF) را مطرح کردند. آنها نشان دادند حل هر مسأله بالینی به شناسایی و بهره گیری از تنها چند عنصر مهم و محوری آن مسأله مرتبط است که مؤلفه های کلیدی (Key Features) نامیده شد. البته همه یافته های مهم که برای تشخیص یا تدبیر یک مسأله بالینی به کار می آیند الزاما KF نیستند، بلکه یافته هایی KF محسوب می شوند که در حل مسأله بالینی چالش برانگیزند و در زمان تصمیم گیری بالینی باید حتماً آنها را لحاظ کرد(2و3). مثلاً در مرد میانسالی که با درد و تورم حاد پشت ساق پای چپ مراجعه کرده است، ریسک فاکتورهای DVT، سابقه ی زخم پا (جهت بررسی سلولیت)، سابقه ی فعالیت شدید بدنی (جهت بررسی پارگی عضلات)، سابقه ی تورم پشت زانو (رد کردن احتمال پارگی کیست بیکر) KF محسوب می شوند چرا که می توان بر اساس آنها درباره ی تشخیص نهایی تصمیم گرفت، در حالی که یافته های مانند تاکی کاردی، هموپتیزی، تب، فشار خون بالا مهم اما غیرکلیدی هستند. از همین رو ناگفته پیداست که KF نام هیچ آزمونی نیست. نظریه ی شرح نامه ی بیماری (Illness Script Theory) شرح دقیقی از این یافته های کلیدی و سنخ آنها می دهد. بر اساس این نظریه پزشکان برای تشخیص هر بیماری ساختاری از ذهن خود دارند که شرح نامه بیماری نامیده می شود و یافته های کلیدی و اقداماتی که برای تشخیص و تدبیر بالینی آن بیماری لازم است در آن وجود دارد. یافته های کلیدی هر شرح نامه چند گونه اند: یافته های بالینی، ریسک فاکتورها و اطلاعات زمینه ای (سن و جنس)، اقدامات تشخیص و تدابیر بالینی(4) ارزیابی مهارت های تصمیم گیری بالینی با رویکرد KF اولین بار در کنفرانسی در دانشگاه کمبریج در سال 1984 مطرح شد. در سال 1986 سازمان نظام پزشکی کانادا از پیج و بورداژ دعوت کرد تا بر اساس رویکرد مؤلفه های کلیدی، آزمون مناسب و استانداردی برای تصمیم گیری بالینی و جایگزین کردن آن به جای Patient Management Problem (PMP) طراحی کنند(5)، چرا که آزمون PMP پایایی کمی داشت، نمی توانست بین افراد با سطوح مختلف خبرگی افتراق دهد، تمرکزش بیش تر برجمع آوری اطلاعات بود تا تصمیم گیری بالینی مناسب. افزون بر این، نمرات آزمون PMP ارتباط زیادی با نمرات آزمون های ارزیابی دانش داشت(6و7). پس از شش سال پژوهش، پیج و بورداژ آزمون مؤلفه های کلیدی Key Feature Problems (KFPs) معرفی کردند که در آن مهارت استدلال بالینی داوطلبان بر اساس تصمیم گیری مبتنی بر مؤلفه های کلیدی (KFs) ارزیابی می شد. در مقایسه با آزمون PMP، در این آزمون محتوا و حجم هر سؤال و لاجرم زمان پاسخ دادن به آن کاهش پیدا کرده بود و بنابراین آزمون دهندگان در زمان یکسان به تعداد سؤال بیش تری پاسخ می دادند(5). KFPs به نام های دیگری چون KFEs), Key Feature Questions (KFQs))Key Feature Examinations و KF based tests و هم نامیده می شود. به لحاظ نظری، هر سؤالی که تمرکز آن بر مؤلفه های کلیدی است را می توانKFQ یا واجد رویکرد مؤلفه های کلیدی (KF approach) نامید. به عبارتی اطلاق نام KFQs به یک آزمون بر اساس رویکرد آزمون و نه شکل (فرمت) آن است. یعنی حتی یک آزمون OSCE هم می تواند بر اساس مؤلفه های کلیدی (KFs) سناریوهای بالینی طراحی شود، ولی در عمل عموماً عنوان KFQ به آزمونی نوشتاری یا کامپیوتری اطلاق می شود که در آن یک سناریوی کوتاه حاوی مؤلفه های کلیدی و غیرکلیدی مطرح می شود که داوطلب باید بر اساس آن دست به تصمیم گیری بالینی بزند مثلاً برای تشخیص نیاز به چه یافته های کلیدی دارید، برای تدبیر بالینی بیمار کدام اقدامات در اولویت است و پرسش هایی از این دست. جواب این سؤالات گاه پاسخ های کوتاه است و گاهی باید از یک سیاهه (لیست) انتخاب شوند. پژوهش های مختلف نشان داده اند که این آزمون روایی و پایایی قابل قبولی دارد(1). پس در مجموع می توان از رویکرد KF Approach و آزمون KF سخن گفت و این انگاره که KF و KFPs دو آزمون متفاوت هستند، نادرست است.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    1394
  • Volume: 

    2
Measures: 
  • Views: 

    401
  • Downloads: 

    0
Abstract: 

لطفا برای مشاهده چکیده به متن کامل (PDF) مراجعه فرمایید.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Author(s): 

MEHRTASH B.

Issue Info: 
  • Year: 

    2002
  • Volume: 

    -
  • Issue: 

    21
  • Pages: 

    23-27
Measures: 
  • Citations: 

    0
  • Views: 

    377
  • Downloads: 

    0
Abstract: 

Background: Selecting the most effective and less toxic drug in treatment of Chemically injured patients of the imposed war is of great importance in therapy. Objective: To compare the therapeutic effect of salbutamol spray with combivent (combination of salbutamol with ipratropium bromide) in pulmonary function tests of lung injured patients of the imposed war. Method: In this study, 30 Chemically injured patients of war under -went spirometry on the Baseline of VC , FEV1/FVC and MMEF . The patients were studied in two different sessions. In the first session, they were given sulbutamol spray (200 mcg) and spirometry was taken after 20 and 180 minutes. In the second session, all patients were given combivent and spirometry was taken in 20 and 180 minutes. Findings: The findings indicated that combivent is more effective than salbutamol alone in improving VC, FEV1/FVC and MMEF. The effects were more remarkable in 180 minute in  comparison to minute. Conclusion: It seems that combination of sulbutamol with ipratropum bromide has better action in bronchodilation in comparison with salbutamol alone in Chemically injured war victims.      

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Author(s): 

Issue Info: 
  • Year: 

    2019
  • Volume: 

    -
  • Issue: 

    -
  • Pages: 

    0-0
Measures: 
  • Citations: 

    1
  • Views: 

    55
  • Downloads: 

    0
Keywords: 
Abstract: 

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2003
  • Volume: 

    6
  • Issue: 

    1 (22)
  • Pages: 

    1-8
Measures: 
  • Citations: 

    0
  • Views: 

    1297
  • Downloads: 

    0
Abstract: 

Chemical weapons are among the most violent weapons of mass destruction used during wars. Unfortunately, these dreaful weapons were frequently used by Iraq against Iranian soldiers during Iran-Iraq war, so that we are still witnessing the late onset consequence of the exposure to these weapons among their victims.Regarding the fact that the usage of Chemical weapons is a threat against humanity with many hazardous effects which tend to appear even after years of exposure, it seems very important to have a complete and correct undestanding about the nature of these gasses in order to gain more information about the clinical pictures of their victims leading to a better approach to the management of there patients. The present article in the result of thorough review and analysis to the textbooks articles and papers published in the last two decades. There are minor and major complications associated with the exposure to these lethal gasses, ranging from simple medical problems like skin colour changes to more serious conditions such as severe ophthalmologic and pulmonary injuries and malignancies. There complications are reviewed in two separate categories (regarding early onset as late onsent complications) in this article.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2023
  • Volume: 

    11
  • Issue: 

    2
  • Pages: 

    61-74
Measures: 
  • Citations: 

    0
  • Views: 

    159
  • Downloads: 

    27
Abstract: 

ABSTRACTDuring the last century, ports of Persian Gulf become the most important storage, refining and transportation of crude oil, oil derivation, petroChemical products and also, business activities. Nowadays, due to functional diversity between ports, the impact of port activities on the development of urban spaces will be different, and this issue leads to structural differences of port cities. The purpose of this research is to identify the Key variables affecting the relations and spatial structure of port-city in Dubai as the most thriving and successful port-city in the Persian Gulf. This research is based on deductive reasoning and carried out by analysis of cross effects with secondary data (results of other prominent articles) and also primary data (questionnaire). sampling method is based on purposive sampling and Micmac software was used to analyze the data. Output of Micmac software shows the position of the instability of the system. Therefore, the position of each variables in the conceptual model can be categorized to driver, linkage, dependent, and autonomous factors. The research findings indicate 4 variables (like as “income, cost and investmnets in port-city”) can be introduced as a driver factor, 5 variables (like as “advanced multimodal transportation in the port”) can be introduced as a linkage factor, 6 variables (like as “quality of living environment and desirable city”) can be introduced as a dependent factor, 3 variables (like as “environmental protection and sustainable development of the city-port”) can be introduced as an autonomous factor. The rapid development of Dubai can be explained by the purposeful distribution of revenues from trade and tourismExtended AbstractIntroductionDuring the last century, ports of Persian Gulf become the most important storage, refining and transportation of crude oil, oil derivation, petroChemical products and also, business activities. The global increase in oil demand since the 1950s led to the creation of discovery of new oil wells and large industrial areas. With the construction of new oil or gas facilities in the port areas, increasing oil revenues contributed to the countries of the Persian Gulf region and form a new geographical relationship between ports and coastal cities which had an impact on the spatial structure and relation of them. Nowadays, due to functional diversity between ports, the impact of port activities on the development of urban spaces will be different, and this issue leads to structural differences of port cities. In the 1950s, Containerization (container loading technology) was based in some of the world's ports and created a huge transformation in the shipping industry, which had a significant impact on the development of ports. Although the ports of the Persian Gulf have made a significant contribution to the economic growth and physical development of other ports in the world, but few researches have been done on the variables and factors affecting the development of the spatial structure of the important ports of the Persian Gulf. This region, due to its unique geographical location, has always been considered as a most important corridor in the field of economic and transportation throughout history. Some of the most important energy and commercial ports in this region are: Dubai, Manama, Kuwait, Dammam, Doha, Bushehr, Bandar-Abbas and Assaluyeh. In this regard, the purpose of this research is to identify the Key variables affecting the relations and spatial structure of port-city in Dubai as the most thriving and successful port-city in the Persian Gulf. MethodologyThis research is based on deductive reasoning and carried out by analysis of cross effects with secondary data (results of other prominent articles) and also primary data (questionnaire). The method used in this research is quantitative and the sampling method is based on purposive sampling. the variables affecting the spatial structure of port-city relations were identified in the form of a review of 31 prominent articles. 25 experts (who had comprehensive knowledge and information about the development process of the city-port of Dubai) participated to determine the effectiveness or influence of variables. Finally, the output of data analysis was done by the Micmac software. Results and discussionOutput of Micmac software shows the position of the variables in the diagram that it indicates their status in the system and their role in the dynamics and changes of the system. The method of distribution and dispersion of the variables in the spatial structure of port-city relations indicates the instability of the system. Therefore, based on the output of the system, the position of each variables in the conceptual model can be identified in five categories (driver, linkage, dependent, autonomous and regulatory variables). According to the results, some variables such as “the changes in the strategic positions” and “geopolitics of port-city”, “the modification of the management method” and “regional planning of the ports”, “the promotion of local governance in the relations between port-city” and “the way of national and international management of ports have been introduced as driver variables. On the other hand, five variables consist of “advanced multimodal transportation in the port” and “income, cost and investment in the port-city”, “the contrast and physical integration of the port - city space”, “the development of various industrial and production activities in the ports and their local hinterland” and “their qualities Financial and commercial policies of ports” have been introduced as linkage variables. Findings of research also shows that some variables consist of “quality of living environment and desirable city”, “quantity and quality of transit corridors (rail, road and air) to hinterland”, “construction and launching the new port (sea port or dry port)”, “terminal facilities and infrastructure and warehousing”, “conflict or convergence between the city and the port” and “increase in population growth rate and migration to the port - city” categorized as dependent variables. Three variables including “cultural and historical background of ports”, “use of cheaper energy, Less-polluted, clean and renewable energies in the city-port” and “environmental protection and sustainable development of the city-port” categorized as autonomous variables. Finally, a variable with the title of “improvement in management and information technology and development in loading, unloading and storage of commodities” have been introduced as regulatory variables. The findings of this research have a remarkable similarity with other researches carried out in the field of city-port relation and clearly emphasize the direct impact of the "investment in port-city" in the development of them. For example, Grossmann (2008) emphasized that city-port of Hamburg has become one of the largest ports in Northern Europe during the last few decades due to huge domestic and foreign investment. ConclusionThis research carried out in order to introduce and explain the Key variables affecting the development of the spatial structure of the port-city of Dubai. On this basis, 21 variables have been extracted by systematic reviews of prominent articles. In the following, 25 experts were selected with the purposive sampling method. Among the 21 variables extracted, 4 variables (like as “geopolitics of port-city”) introduced as a driver factor, 5 variables (like as “advanced multimodal transportation in the port”) introduced as a linkage factor, 6 variables (like as “quality of living environment and desirable city”) introduced as a dependent factor, 3 variables (like as “environmental protection and sustainable development of the city-port”) introduced as an autonomous factor. The rapid development of Dubai can be explained by the purposeful distribution of revenues from trade and tourism. A part of these revenues has been directed towards investment in important transportation infrastructures such as airports and ports of this city. These strategies have a wide impact on improving the economic growth of the city and the development of the port in order to adapt with the global trade and advanced technologies. FundingThere is no funding support. Authors’ ContributionAuthors contributed equally to the conceptualization and writing of the article. All of the authors approved the content of the manuscript and agreed on all aspects of the work declaration of competing interest none. Conflict of InterestAuthors declared no conflict of interest. Acknowledgments We are grateful to all the scientific consultants of this paper.

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Issue Info: 
  • Year: 

    0
  • Volume: 

    21
  • Issue: 

    11
  • Pages: 

    3-19
Measures: 
  • Citations: 

    0
  • Views: 

    112
  • Downloads: 

    0
Abstract: 

امروزه بسیاری از مستشرقان، برای فلسفه در فرهنگ های شرقی، اصالت قایل اند و بسیاری از مفاهیم کلیدی در این فرهنگ ها را برخاسته از متن تمدن های شرقی می دانند. این باور، باعث شده تا مستشرقان به بررسی مفاهیم مطرح در فلسفه های شرقی همت گمارده و برخی از آنها را با مفاهیم مطرح در فلسفه های غربی، تطبیق نمایند. الیور لیمن، از جمله اندیش مندان غربی است که در دو دهه ی اخیر، آثاری ارزشمند در خصوص فلسفه های شرقی بویژه فلسفه ی اسلامی نگاشته است. در جستار حاضر، بر آنیم تا به نقد و بررسی یکی از مهم ترین این آثار با عنوان "مفاهیم کلیدی در فلسفه های شرقی" بپردازیم. لیمن در این اثر، با گردآوری مفاهیم کلیدی در فلسفه های شرقی چون هندوییسم، بودیسم، آیین کنفوسیوس و فلسفه ی اسلامی، توضیحاتی مختصر برای هر اصطلاح بیان نموده است. از مهم ترین محاسن اثر لیمن، آن است که وی سعی داشته تا این مفاهیم را در ساختار تمدنی خود فلسفه های شرقی تبیین کند. اما او برخی از مفاهیم کلیدی در فلسفه های شرقی به ویژه فلسفه اسلامی را مطرح نکرده و یا توضیح چندان روشنی درباره ی آنها ارایه نکرده است. هم چنین توضیحات برخی مدخل ها در این اثر، کافی نیست و حتی لیمن از بیان برخی اصطلاحات کلیدی در فلسفه های شرقی، غفلت ورزیده است.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Author(s): 

LALOEE A. | KASHANI ZADEH N.

Issue Info: 
  • Year: 

    2003
  • Volume: 

    6
  • Issue: 

    1
  • Pages: 

    6-11
Measures: 
  • Citations: 

    0
  • Views: 

    4537
  • Downloads: 

    0
Abstract: 

Objective: After war he community was encountered with many of the war wounded who suffered from the outcome of the Chemical Gases which were used by Iraq. These outcomes are divided into early and advanced stages. Pregnancy outcomes such as spontaneous abortion, low birth weight and preterm labor are advanced.There are limited studies about these out comes. The aim of this study is to survey pregnancy outcome in wives of the Chemical war wounded. and to determine the relation between Chemical gas exposure with such results as low birth weight, preterm labor, intra uterine fetal death, fetus abnormality and altered sex ration.Materials and Methods: Our study is descriptive. We sampled 50 accidentally Chemically injured patients from 2100 victims in Kerman and obtained questionnaire data concerning Chemical gas exposure and reproductive health experience.Results: Of these 50 Chemically injured, patients there Were 120 cases of pregnancies. Among the 120 pregnancies, there were 19% LBW, 13%preterm labor and 8% abortion. Variables such as low birth weight, abortion and preterm labor with such variables as mother's and father's age, education and severity of Chemical injuring were analyzed in SPSS system. Conclusion: Except for parents age, in other variables p was less than 0.05 that shows relations are meaningful.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 4537

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesCitation 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesRefrence 0
Issue Info: 
  • Year: 

    2025
  • Volume: 

    13
  • Issue: 

    3
  • Pages: 

    299-322
Measures: 
  • Citations: 

    0
  • Views: 

    7
  • Downloads: 

    0
Abstract: 

Every year, billions of cubic meters of flare gas burn in various upstream and downstream sectors of the oil industry. This is a valuable source of energy and is wasted due to the lack of necessary infrastructure. Various solutions have been proposed to recover flare Gases and reuse them and electricity production is of particular importance due to its high flexibility and the existence of many technologies. The purpose of this research is to investigate the distribution of associated and flare Gases in provinces of Iran based on satellite data provided by the World Bank. Arc GIS software was used to prepare the dispersion map. Then, based on this information, the amount of lost capital, the amount of CO2 equivalent emissions caused by the burning of these Gases, and the potential of electricity generation in each of the provinces of Iran have been calculated separately. According to the obtained results, the total gas flared in Iran raised incredibly from 2020 to 2023 (from 13258.05 to 20421.13 million of cubic meters). It means not only growing in the lost capital from 1521.66 to 2343.48 milliondollars and the total equivalent emission of CO2 from 35.35 to 57.18 million tones but also raising the total potential of power generation from 8181.82 to 12589.19 MW. Furthermore, the dispersion of associated and flare Gases in Iran creates a suitable situation for creating dispersed generation power plants, especially in provinces such as Khuzestan, Bushehr, Kohgiloyeh and Boyer Ahmed, and Ilam.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesCitation 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesRefrence 0
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