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مرکز اطلاعات علمی SID1
Issue Info: 
  • End Date: 

    2023/8/23
Measures: 
  • Citations: 

    0
  • Views: 

    53
  • Downloads: 

    3
Abstract: 

یکی از مسائلی که طی دهه های گذشته نظام برنامه ریزی و مدیریت شهری کشور را تحت تأثیر قرار داده است، روند فزاینده تخلفات ساختمانی است که به دلیل افزایش چشمگیر قیمت مسکن، عملاً تنبیهات و جریمه های در نظر گرفته شده برای پیشگیری از تخلفات نه تنها، ماهیت بازدارنده خود را از دست داده؛ بلکه به بخشی از مسیر و گردش کار رایج در ساخت وسازهای کشور مبدل شده است. شکل گیری و احداث ساختمان های ناایمن نوساز بدترین پیامد و مصداق این رویه فراگیر است که اگرچه شدت و فراگیری آن نسبت به کل تخلفات بسیار کمتر است، اما مانند حادثه تلخ مترو پل تبعات جبران ناپذیر جانی و مالی در پی دارد.بنابراین بهبود سیستم نظارت بر ساخت وساز شهری، کاهش تشریفات و بوروکراسی اداری، اصلاح جرائم، بازنگری در ضوابط و مقررات، الزام شهرداری ها و ایجاد ضمانت اجرایی در اجرای آرای کمیسیون ماده (100) قانون شهرداری تا حدودی ایجاد منابع درآمد پایدار شهرداری ها ازجمله مواردی است که می تواند به کاهش تخلفات ساختمانی در سطح کشور کمک بسزایی کند. در همین راستا گزارش حاضر، با هدف آسیب شناسی و تحلیل علل گرایش به تخلفات ساختمانی در کشور، بررسی آمار و حجم تخلفات صورت گرفته، تحلیل پیامدها و آثار تخلفات ساختمانی در شهرها و ارائه راهکارهای پیشنهادی کنترل و مقابله با این پدیده ارائه شده است. شایان ذکر است، موضوع این گزارش بر تخلفات ساختمانی در محدوده قانونی و حریم شهرها دلالت دارد و تخلفات ساختمانی مرتبط با خارج از حریم شهرها، مناطق آزاد، محدوده روستاها و... که حوزه قانونی و مصادیق متفاوتی دارد را شامل نمی شود.

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

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Issue Info: 
  • Year: 

    621
  • Volume: 

    10
  • Issue: 

    4
  • Pages: 

    45-64
Measures: 
  • Citations: 

    0
  • Views: 

    129
  • Downloads: 

    405
Abstract: 

French philosopher, novelist and critic Jean-Paul Sartre considers the emergence of anti-novels to be the most important feature of contemporary literature. In his view, the novel's appearance and main lines seem to be preserved, but its unrealistic imagination and characters indicate that the era of the novel has passed in the past style, and the contemporary period is the era of thought in the novel. Hence, the contemplation of today's reader plays an essential role in understanding the facts in order to be able to understand the meaning and concept of the novel more deeply and to reach the intended facts. With its special tricks in the field of characterization, timelessness and placelessness, intertextuality and constant change of language from old to new, etc., it can be considered as a new and anti-novel approach. Therefore, in the present article, an attempt is made to answer the question in a descriptive-analytical manner, which of the features of this novel puts it in the category of anti-novel and new novel? The achievement of this study indicates that this novel, in terms of characterization, elimination of the main character, narrator, intertextuality, ambiguity in time and place, the reader's assistance in creating the text, imagination, etc., has significant similarities with the anti-novel and new novel components.

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

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Journal: 

مجازی

Issue Info: 
  • Year: 

    1
  • Volume: 

    1
  • Issue: 

    1
  • Pages: 

    350-351
Measures: 
  • Citations: 

    0
  • Views: 

    756
  • Downloads: 

    34
Keywords: 
Abstract: 

این مطالعه به منظور ارزیابی ویژگی های بالینی نوریت اپتیک از جمله حدت بینایی نهایی و ایجاد اسکلروز مولتی پل (MS) در بچه ها انجام شده است. بررسی بر روی 25 چشم از 15 بیمار زیر 15 سال، دارای علایم بالینی نوریت اپتیک صورت پذیرفت. میانگین سنی بیماران در شروع حمله نوریت اپتیک 9.8 سال (15-4 سال) بود. نه نفر (60 درصد) از بیماران دختر بودند و در دوسوم بیماران طی دو هفته قبل از بروز علایم بینایی سابقه یک بیماری ویروسی وجود داشت. هیج کدام از بیماران در یک ماه اخیر قبل از حمله نوریت اپتیک واکسن دریافت نکرده بودند. سه بیمار دارای سابقه خانوادگی MS بودند.

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Author(s): 

Hassanvand P. | Hosseini M.

Issue Info: 
  • Year: 

    1402
  • Volume: 

    14
  • Issue: 

    3
  • Pages: 

    27-39
Measures: 
  • Citations: 

    0
  • Views: 

    60
  • Downloads: 

    16
Abstract: 

The design of elements under blast load came to the attention of scientists after World War II. Extensive research has been done in the last fifty years on the behavior of structures against blast loads and their reaction. Due to the intensity and magnitude of blast loads, it is important to carry out the most appropriate scheme in terms of economics and safety for a structure. If the design is not done correctly and with the right criteria selected, it may impose exorbitant costs on the execution of a structure. The type of blast in this research is blast in the open air and unrestricted surface. A surface blast is a blast that occurs at a surface or at a very close distance to the ground. In this research, different methods of strengthening the column of concrete bridges under blast load will be investigated. The considered strengthening methods include changing the arrangement of the rebars on the cross-sectional area, increasing the amount of cross-sectional rebars, using FRP rebars and increasing or changing the geometric shape of the column cross-sectional area,Then the most appropriate, economical and safest strengthening scheme is selected and a suitable strengthening model for the above system is presented. The structural models studied in this research are investigated at an identical blast level (1000 kg TNT at 3 meters from the structure). The software used in analyzing the studied models is SAP2000 software. The results showed that some strengthening methods, such as increasing the amount of cross-sectional rebars, increase structural responses. Also, among the strengthening methods selected in the research, replacing FRP rebars instead of regular rebars in the reinforced concrete bridge columns is the most effective and the best method of strengthening these structures against the blast loads.

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

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Author(s): 

گروپ گرد

Issue Info: 
  • Year: 

    1348
  • Volume: 

    -
  • Issue: 

    2
  • Pages: 

    52-58
Measures: 
  • Citations: 

    1
  • Views: 

    160
  • Downloads: 

    34
Keywords: 
Abstract: 

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

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Author(s): 

هنرفر لطف اله

Journal: 

هنر و مردم

Issue Info: 
  • Year: 

    1348
  • Volume: 

    -
  • Issue: 

    81
  • Pages: 

    0-0
Measures: 
  • Citations: 

    3
  • Views: 

    695
  • Downloads: 

    34
Keywords: 
Abstract: 

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

View 695

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Author(s): 

هنرفر لطف اله

Journal: 

هنر و مردم

Issue Info: 
  • Year: 

    1350
  • Volume: 

    10
  • Issue: 

    109
  • Pages: 

    0-0
Measures: 
  • Citations: 

    1
  • Views: 

    226
  • Downloads: 

    0
Keywords: 
Abstract: 

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

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Author(s): 

بهاری فخری

Journal: 

هنر و مردم

Issue Info: 
  • Year: 

    1353
  • Volume: 

    -
  • Issue: 

    -
  • Pages: 

    60-63
Measures: 
  • Citations: 

    1
  • Views: 

    228
  • Downloads: 

    34
Keywords: 
Abstract: 

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

View 228

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Author(s): 

Moradinejad Amir

Issue Info: 
  • Year: 

    1982
  • Volume: 

    34
  • Issue: 

    2
  • Pages: 

    203-222
Measures: 
  • Citations: 

    0
  • Views: 

    0
  • Downloads: 

    0
Abstract: 

Introduction Erosion and deposition cause irreparable damage to water construction projects. Among these damages, we can mention the accumulation of sediment behind the dams and the reduction of their useful volume, the destruction of structures, the reduction of capacity and the increase in the maintenance cost of irrigation canals. On the other hand, sediment transport has an effect on water quality indicators in terms of drinking and agriculture. Accurate estimation of river suspended sediment load from various aspects of water resources engineering, environmental issues and water quality is of particular importance. In this regard, the hydrological models of the basin have not shown proper efficiency in estimating the amount of suspended sediment, due to the many influencing factors. Most of the simulation studies of suspended sediment estimation are based only on the flow rate of the basin outlet, and the obtained results are proof of their inefficiency. In the meantime, the development and use of new sediment estimation methods that are easy to use in addition to sufficient accuracy will play an important role. Nowadays, the fuzzy and neural intelligent conductor system has found many applications in various water engineering problems, including sedimentation, due to its ability to solve complex and nonlinear phenomena. Due to the great importance of sediment transport in the optimal use of water resources and the design of dams, it is very necessary to obtain an accurate method for estimating the amount of suspended sediment load in rivers.Materials and Methods The purpose of this research is to evaluate and compare the two methods of support vector machine models (SVM) and group data control method (GMDH) in estimating the suspended sediment load of the Pol Doab station of Qarachai River in Markazi Province and comparing it with the results of the measuring curve. is for this purpose, the daily data of discharge, sediment, temperature and rainfall parameters of Shazand Pol Doab station were used. For this work, 13 scenarios and different combinations of parameters were defined. Then the results of the two methods were compared with each other and with the results of the measuring curve. Finally, the best method was suggested. For this purpose, library and field studies and review of related sources, statistics and information were collected. The statistics of temperature, rainfall, daily average discharge of stream and sediment measured daily during a long-term statistical period of 40 years at Pol Doab Hydrometry Station were received from the Meteorology and Regional Water Department of Markazi Province. The received data were categorized and converted into the input format of the models. According to the discharge and corresponding sediment, the curve of the sediment gauge was drawn and its equation was obtained. Appropriate patterns of input variables were selected based on trial and error. Considering that the mentioned parameters have a historical course, therefore, the design of the input patterns of soft computing models should be done based on time delays (like what is discussed in the analysis and forecasting of time series). Then the model was taken for each input and output pattern. In the next step, the most appropriate time delay of the input parameters in the modeling, which had a higher R2 determination coefficient and a lower root mean square error (RMSE) was selected. In this research, 70% of research data was used as training and 30% for validation and testing. Finally, two data-mining methods were compared with each other and also with gauge curve and observational data.Results and Discussion The results obtained from this research indicated the acceptable performance of the methods used in predicting suspended sediment amounts. Comparing the results of GMDH, SVR and SRC models shows the superiority of GMDH and SVR models in predicting suspended sediment values compared to Verdi model number 6. The results showed the acceptable performance of the GMDH model with the highest R2 determination coefficient of 0.99 and the lowest root mean square error of 83 tons per day. According to the obtained results, it can be said that the GMDH model as a powerful and high-speed model can be used to model suspended sediment. The results of the research showed that both data-mining methods have far better efficiency and accuracy in estimating the suspended load of river sediment than the sediment gauge curve. Data mining-based methods can be used as an alternative to estimate the river's suspended load. It should be noted that due to climate change and droughts, industrial development, colonization of land use and changes in the morphology of watersheds, the obtained results cannot be used forever at any time, but should be used whenever the models need to be updated. Another weakness of the models is that with the increase in the number of developed layers, the accuracy of the produced answers increases, but the produced relationships between the input and output variables become very complicated. Conclusions The results of modeling with (SVM) showed that scenario number 6, which includes discharge at the current time and discharge and sediment with a time delay step, with the highest determination coefficient R2 with a value of 0.98 and the lowest root mean square error RMSE equal to 185 kg per day. It performs better in other scenarios. In the next step, the best model selection model (SVM) was used as the input of the GMDH model. The results were compared with the model (SVM) and sediment gauge curve. The results show the acceptable performance of the GMDH model with the highest R2 determination coefficient of 0.99 and the lowest root mean square error of 83 kg per day compared to the other two methods. The obtained results showed that both investigated data mining methods provide much better results than the sediment gauge curve. The coefficients and functions used to calibrate the intelligent models used in this research can be very useful for estimating the suspended sediments of nearby stations without statistics having the same geological and hydrological conditions at the regional level.

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