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Issue Info: 
  • End Date: 

    مهر 1388
Measures: 
  • Citations: 

    4
  • Views: 

    312
  • Downloads: 

    0
Keywords: 
Abstract: 

هدف از اجرای این طرح آماده سازی کد مورد نیاز برای نرم افزار چاه آزمایی و همچنین تهیه نرم افزاری جهت محاسبه خواص سیالات مخزن توسط روابط تجربی است. جهت کد نویسی این برنامه از زبان ویژوال بیسیک استفاده شده است. روابط تجربی موجود در کتب مختلف جمع آوری و بهترین و دقیق ترین آنها جهت استفاده در نرم افزار انتخاب شده اند. کاربر با انتخاب نام رابطه تجربی که غالبا نام شخص ابداع کننده آن است می تواند مقادیر خواص سیالات نفتی (آب، نفت، و گاز) را محاسبه نماید. نتایج حاصل از این طرح جهت استفاده در نرم افزار چاه آزمایی مود استفاده قرار می گیرد. به علاوه، این نرم افزار به تنهایی نیز می تواند به عنوان یک نرم افزار stand alone بکار رود.

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

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Writer: 

مهدی-جلالی

Issue Info: 
  • End Date: 

    مهر 1384
Measures: 
  • Citations: 

    0
  • Views: 

    253
  • Downloads: 

    0
Keywords: 
Abstract: 

قطعه فوق یک قطعه استراتژیک در صنعت حفاری است که دانش فنی آن را جهاد تهیه کرده است. دانش فنی این قطعه شامل مشخصات مکانیکی و متالورژیکی، نقشه فنی و نقشه بازرسی و همچنین اسکوپ بازرسی است.

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: 

    53
  • Issue: 

    4
  • Pages: 

    245-254
Measures: 
  • Citations: 

    0
  • Views: 

    142
  • Downloads: 

    20
Abstract: 

This study aimed to estimate the genetic parameters of body weight traits in Markhoz goats, using B-spline random regression models. The data used in this study included 19549 records collected during 29 years (1992-2021) in Markhoz goat Breeding Research Station, located in Sanandaj, Iran. The model used to analyze data included fixed effects (year of birth, sex, type of birth and age of dam) and random effects including direct additive genetic, maternal additive genetic, permanent environmental and maternal permanent environmental assuming homogeneous and heterogeneous residual variance during the time. Akaike (BIC) and Bayesian (BIC) information criteria were used to compare the models and bspq.4.4.4.4 was selected as the best model. The direct heritability values for birth, 3-month, 6-month, 9-month and 12-month weights were estimated to be 0.14, 0.16, 0.08, 0.28 and 0.26, respectively. Genetic Correlation between body weights at birth and 3-month, birth and 6-month, birth and 9-month, birth and 12-month, 3-month and 6-month, 3-month and 9-month, 3-month and 12-month, 6-months and 9-month and 9-month and 12-month were 0.22, 0.38, 0.21, 0.56, -0.26, 0.30, 0.62, 0.86 and 0.77, respectively. The highest phenotypic Correlation was between the weight of 9-month and 12-month (0.82) and the lowest Correlation was between birth weight and 3-month and 6-month (0.12). The results showed that the 9-month weight is a good criterion for selection in Markhoz goats.

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

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Journal: 

Issue Info: 
  • Year: 

    2007
  • Volume: 

    20
  • Issue: 

    3 (76 IN AGRONOMY AND HORTICULTURE)
  • Pages: 

    71-79
Measures: 
  • Citations: 

    0
  • Views: 

    1483
  • Downloads: 

    0
Abstract: 

Plant development can be defined as a programmed qualitative change in plant form, which leads plant to maturity, and researchers call it as phasic development or phenology. Recognizing the timing of occurring each development stage is necessary for managing system in order to yield increment. The timing of occurring development stages depend on climate, genotype specifications and sowing date then determination of these times in different regions is difficult and it is only possible through the using of crop simulation models which can predict the timing of occurrence each development stage by integrating effective factors. The model was constructed based on linear equation of plant temperature response. In order to model evaluation two experiments were carried out in agricultural and natural resources research center of Khuzistan in 2003-2004 and 2004-2005 cropping years. Wheat development stages were determined based on Kirby and Appleyard’s scale by stereoscopic microscope and required GDD for each development stage as well. The constructed model was calibrated and run for simulation. Comparison of simulated and observed data showed that the model can strongly predict wheat development stages.

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

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Issue Info: 
  • Year: 

    2021
  • Volume: 

    12
  • Issue: 

    Special Issue
  • Pages: 

    541-562
Measures: 
  • Citations: 

    0
  • Views: 

    34
  • Downloads: 

    2
Abstract: 

Today, intrusion detection systems are extremely important in securing computers and computer networks. Correlated systems are next to intrusion detection systems by analyzing and combining the alarms received from them, appropriate reports for review and producing security measures. One of the problems face by intrusion detection systems is generating a large volume of false alarms, so one of the most important issues in correlated systems is to check the alerts received by the intrusion detection system to distinguish true-positive alarms from false-positive alarms. The main focus of this research is on the applied optimization of classification methods to reduce the cost of organizations and security expert time in alert checking. The proposed intrusion detection model using Correlation(IIDMC) is tested on a valid test dataset and the results show the efficiency of the proposed model and consequently its high accuracy.

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

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Issue Info: 
  • Year: 

    1386
  • Volume: 

    13
Measures: 
  • Views: 

    454
  • Downloads: 

    0
Abstract: 

اخیرا مفهوم گفتار قابل استفاده به عنوان راه حلی برای پردازش گفتار هم – کانال پیشنهاد شده است. در این مقاله، ابتدا الگوریتمی مبتنی بر تبدیل موچک گسسته (DTW) برای تشخیص خاصیت پریودیکی یک فریم از سیگنال هم – کانال پیشنهاد شده و در دو مورد از آن استفاده شده است. مورد اول برای بهبود عملکرد تشخیص قسمتهای صدادار و تعریف یک معیار جدید برای قابل استفاده بودن سیگنال گفتار هم – کانال و مورد دوم برای بدست آوردن یک سطح آستانه جدید و استخراج قسمتهای قابل استفاده از سیگنال گفتار هم – کانال. همچنین پارامتر P-Correlation به عنوان معیاری برای انتخاب دسته بندی کننده ای که fusion آن با الگوریتم پیشنهاد شده برای استخراج قمستهای قابل استفاده منجر به نتیجه بهتر می گردد معرفی شده است. پس از یافتن دسته بندی کننده مناسب، از یک الگوریتم fusion ساده و کارامد برای ترکیب نتایج تصمیم این دو دسته بندی کننده استفاده شده است. نتایج بدست آمده نشان می دهد که نسبت به الگوریتم های مشابه، الگوریتم پیشنهادی حدود 7 درصد دارای کارایی بهتری می باشد.

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

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Author(s): 

Tohidi Nasim | Dadkhah Chitra

Issue Info: 
  • Year: 

    2023
  • Volume: 

    12
  • Issue: 

    1
  • Pages: 

    74-88
Measures: 
  • Citations: 

    0
  • Views: 

    58
  • Downloads: 

    0
Abstract: 

Today, one of the most widely used natural language representation methods is meaning representation for text processing in different systems. Meaning representation methods have had many applications in the field of natural language processing in recent years, including automatic text summarization systems and question and answer systems, etc. Many text expressions may be different in terms of grammatical structure, but they are the same in terms of meaning, so how to apply a single and uniform meaning to them is one of the challenges of text processing. The main goal of this paper is to design an Integrated Semantic Representation (ISR) model for natural language. The proposed model, while maintaining its simplicity in annotation and understanding, does not depend on specific natural language features or on syntactic and lexical structure. In this regard, several examples in both English and Persian language, which have different in terms of written and grammatical structure, are presented in this paper. Moreover, by using the proposed model, the same representation is provided for texts with the same meaning and different grammatical structure. The proposed model is designed in graph and list format is recommended to annotate its corpuses. One of the main features of this model is that it can represent semantic relations at both sentence-level and document-level and is able to represent complex and important linguistic phenomena such as aspect, tense, and quantification. The simplicity of the proposed model helps to avoid making language processing slow or complicated in various applications, and the preparation of structures based on this model for different natural languages will not be too complicated, so that it can be used both for natural languages with low resources and for those with various resources. Further, features of the proposed model are compared with one of the most important related works.

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

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Writer: 

راسخ پریوش

Issue Info: 
  • Year: 

    1391
  • Volume: 

    4
Measures: 
  • Views: 

    747
  • Downloads: 

    0
Keywords: 
Abstract: 

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

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