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عنوان: 
نویسندگان: 

اطلاعات دوره: 
  • سال: 

    1402
  • دوره: 

  • شماره: 

  • صفحات: 

    -
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    28
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

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

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نویسندگان: 

MUTLU ALI | MUTLU BERRIN

نشریه: 

MATHEMATICAL SCIENCES

اطلاعات دوره: 
  • سال: 

    2013
  • دوره: 

    7
  • شماره: 

    -
  • صفحات: 

    1-12
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    279
  • دانلود: 

    0
چکیده: 

Using free simplicial algebras with given CW−basis, it is shown how to construct a free or totally free quasi 3-crossed module on suitable construction data. Quasi 3-crossed complexes are introduced and similar freeness results are given for these are discussed.

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بازدید 279

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اطلاعات دوره: 
  • سال: 

    1398
  • دوره: 

    49
  • شماره: 

    2 (پیاپی 88)
  • صفحات: 

    901-911
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    813
  • دانلود: 

    471
چکیده: 

رادارهای اولیه جستجوگر ارتفاع پست از نوع موج پیوسته بوده و در ساده ترین حالت از مدولاسیون دندانه اره ای در یک اسکن و بدون مدولاسیون در اسکن بعدی استفاده می شده است. با تعیین فرکانس سیگنال بازگشتی در دو اسکن متوالی، برد و سرعت شعاعی هدف می تواند استخراج شود. لزوم دو اسکن متوالی برای تعیین برد از مشکلات اصلی این روش است. به منظور استخراج همزمان برد و سرعت شعاعی در طی یک بار رؤیت هدف، شکل موج مدوله کننده به مثلثی تغییریافته و همزمان به منظور جبران پخش شدگی طیف در اثر نمونه برداری و همچنین برای هموار نمودن طیف سیگنال بازگشتی، دو پیش پردازش ارائه شده است؛ که در تعیین دقیق تر مؤلفه های ناشی از هدف در شرایط سیگنال به نویز کوچک، تأثیر به سزایی دارد. هم چنین به منظور تعیین دقیق تر زوج مؤلفه های فرکانسی ناشی از هدف در طیف پیش پردازش شده، الگوریتمی ساده پیشنهادشده است. پردازش های موردنظر با استفاده از پردازنده DSP از نوع TMS320C6416 روی سیگنال واقعی رادار انجام گرفته است. نتایج تجربی حاصله نشان دهنده ثبات بیشتر و خطا کمتر در تعیین برد نسبت به روش های مورداستفاده پیشین، است.

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مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
اطلاعات دوره: 
  • سال: 

    1402
  • دوره: 

    13
  • شماره: 

    3
  • صفحات: 

    67-87
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    145
  • دانلود: 

    24
چکیده: 

A B S T R A C T The current research is descriptive-analytical. In terms of purpose, it is in the category of applied research. Both library and field methods have collected the information required for this research. The statistical population of the research consisted of citizens living in Kasra, Azadi, Rezvan, Rahan, Hasht Behesht and Zeytoun residential complexes, which consisted of 6588 people, and the sample size according to the Cochran formula was 364. The study results of the studied residential complexes from the perspective of spatial connectivity indicators indicated that among the investigated complexes, Rahan residential complex had the lowest connectivity index compared to the rest of the complexes, and the highest share of this comparison goes to Kasra residential complex. From the comparison of the complexes based on the interconnection index, we conclude that the location of spaces and accesses in Rahan complex is very weak. Compared to the rest of the complexes, the location of access and communication in Kasra complex is lower. Moreover, Rezvan has been suitable and successful. It is said that the increase of connection in public spaces occurs with increase of sociability. Among the other results of this research, the spatial order component with the path coefficient value of 0.368 has the highest path coefficient among the investigated components. In the first place, the playability component with a path coefficient of 0.253 is in the second place, the multi-purpose component with a path coefficient of 231 0.0 in the third place, the security component with a path coefficient of 0.162 is in the fourth place and the environmental comfort component is in the fifth place with a path coefficient of 0.153 Extended Abstract Introduction In the public space of neighborhoods and residential environments, the issue of sociability has been less addressed. Public spaces can boost the social life of citizens by strengthening social interactions and being involved in social sustainability. The residential environment conveys the residents a sense of well-being and satisfaction through physical, social or symbolic features. In each residential complex, according to the different arrangements of the blocks in it, it is possible to reach different influential indicators of the public space in it, which, according to the way they are arranged, have different potentials from the point of view of sociability in them. Declining sociability causes many problems in relationships between people and reduces the sense of belonging to a place, security, and other issues caused by not paying attention to the quality of collective life in housing. The main question is: - What are the components of the spatial structure affecting the sociability of residential complexes in the city of Kermanshah?   Methodology The current research is descriptive-analytical. In terms of purpose, it is in the category of applied research. Two library and field methods have collected the information needed for this research. In the field method, primary data collection has been done according to the research questions by designing a 5-scale Likert scale questionnaire. The statistical population of the study consisted of citizens living in Kasra, Azadi, Rezvan, Rahan, Hasht Behesht and Zeytoun residential complexes, which consisted of 6588 people, and the sample size was estimated to be 364 people using the Cochran formula. Factors such as the ease of access to the complexes, the willingness and cooperation of the residents and the management of the complexes were also influential in selecting the samples studied in this research. In this research, in order to investigate the sociability of residential complexes based on the   theoretical framework prepared in the present research, the physical indicators affecting this issue include five indicators of "connectivity, interconnectedness, control, selection and depth" in each of The studied samples have been evaluated and analyzed in public spaces including the playground, gathering space, parking lot, and lobby. This research used Depthmap analytical software and structural equation modeling software to analyze the data.   Results and discussion In this research, the relation of sociability of public spaces of residential complexes in Kermanshah, which includes Kasra residential complex, Azadi residential complex, Rezvan residential complex, Rahan residential complex, Hasht Behesht residential complex and Zeytoun residential complex as the basis of the research case. Among the samples studied, Rahan residential complex has the lowest connectivity index compared to other complexes; the largest share of this comparison goes to Kasra residential complex. In the meantime, Zeytoun residential complex, then Azadi, Hasht Behesht and Rezvan have the lowest to the highest amount. It can be seen that the public spaces of Rahan residential complex do not have the desired level of connectivity. As the communication increases, the spaces will become more sociable. From the comparison of the complexes based on the interconnection index, we conclude that the location of the spaces and accesses in the Rahan complex is very weak and lower than the rest of the complexes. According to the numbers extracted, Zeytoun complex and following that Kasra and Rezvan complexes are at the same level of performance, and Azadi and Hasht Behesht complexes have the best performance in this aspect; the placement of access and communications in Kasra and Rezvan complexes has been appropriate and successful. It is said that the increase of connection in public spaces occurs with the increase of sociability. Among the investigated sociability components, the spatial order component with the path coefficient value of 0.368 has the highest path coefficient. In the first place the playability component with a path coefficient of 0.253 is in the second place, and the multipurpose component with a path coefficient of 0.231. In the third place, the security component, with a path coefficient of 0.162, is in the fourth place, and the environmental comfort component is in the fifth place, with a path coefficient of 0.153.     Conclusion Living in the common spaces of residential complexes allows one to be with others comfortably and effortlessly. A person can take a usual walk to be among people, sit on a bench near the door for a short time, and even sometimes look out of the window can be a worthwhile activity. In this research, an attempt was made to examine the condition of the studied residential complexes from the perspective of sociability. The results showed that Rahan residential complex had the lowest level of connectivity index compared to the rest of the complexes and the largest share of this. The comparison reaches Kasra residential complex. In the meantime, Zeytoun residential complex, then Azadi, Hasht Behesht and Rezvan have the lowest to the highest amount. It can be seen that the public spaces of Rahan residential complex do not have the desired level of connectivity. As the communication increases, the spaces will become more sociable. From the comparison of the complexes based on the interconnection index, we conclude that the location of spaces and accesses in Rahan complex is very weak. Compared to the rest of the complexes, the location of access and communication in Kasra complex is lower. And Rezvan has been suitable and successful. It is said that the increase of connection in public spaces occurs with the increase of sociability. Extended Abstract Introduction In the public space of neighborhoods and residential environments, the issue of sociability has been less addressed. Public spaces can boost the social life of citizens by strengthening social interactions and being involved in social sustainability. The residential environment conveys the residents a sense of well-being and satisfaction through physical, social or symbolic features. In each residential complex, according to the different arrangements of the blocks in it, it is possible to reach different influential indicators of the public space in it, which, according to the way they are arranged, have different potentials from the point of view of sociability in them. Declining sociability causes many problems in relationships between people and reduces the sense of belonging to a place, security, and other issues caused by not paying attention to the quality of collective life in housing. The main question is: - What are the components of the spatial structure affecting the sociability of residential complexes in the city of Kermanshah?   Methodology The current research is descriptive-analytical. In terms of purpose, it is in the category of applied research. Two library and field methods have collected the information needed for this research. In the field method, primary data collection has been done according to the research questions by designing a 5-scale Likert scale questionnaire. The statistical population of the study consisted of citizens living in Kasra, Azadi, Rezvan, Rahan, Hasht Behesht and Zeytoun residential complexes, which consisted of 6588 people, and the sample size was estimated to be 364 people using the Cochran formula. Factors such as the ease of access to the complexes, the willingness and cooperation of the residents and the management of the complexes were also influential in selecting the samples studied in this research. In this research, in order to investigate the sociability of residential complexes based on the theoretical framework prepared in the present research, the physical indicators affecting this issue include five indicators of "connectivity, interconnectedness, control, selection and depth" in each of The studied samples have been evaluated and analyzed in public spaces including the playground, gathering space, parking lot, and lobby. This research used Depthmap analytical software and structural equation modeling software to analyze the data.   Results and discussion In this research, the relation of sociability of public spaces of residential complexes in Kermanshah, which includes Kasra residential complex, Azadi residential complex, Rezvan residential complex, Rahan residential complex, Hasht Behesht residential complex and Zeytoun residential complex as the basis of the research case. Among the samples studied, Rahan residential complex has the lowest connectivity index compared to other complexes; the largest share of this comparison goes to Kasra residential complex. In the meantime, Zeytoun residential complex, then Azadi, Hasht Behesht and Rezvan have the lowest to the highest amount. It can be seen that the public spaces of Rahan residential complex do not have the desired level of connectivity. As the communication increases, the spaces will become more sociable. From the comparison of the complexes based on the interconnection index, we conclude that the location of the spaces and accesses in the Rahan complex is very weak and lower than the rest of the complexes. According to the numbers extracted, Zeytoun complex and following that Kasra and Rezvan complexes are at the same level of performance, and Azadi and Hasht Behesht complexes have the best performance in this aspect; the placement of access and communications in Kasra and Rezvan complexes has been appropriate and successful. It is said that the increase of connection in public spaces occurs with the increase of sociability. Among the investigated sociability components, the spatial order component with the path coefficient value of 0.368 has the highest path coefficient. In the first place the playability component with a path coefficient of 0.253 is in the second place, and the multipurpose component with a path coefficient of 0.231. In the third place, the security component, with a path coefficient of 0.162, is in the fourth place, and the environmental comfort component is in the fifth place, with a path coefficient of 0.153.     Conclusion Living in the common spaces of residential complexes allows one to be with others comfortably and effortlessly. A person can take a usual walk to be among people, sit on a bench near the door for a short time, and even sometimes look out of the window can be a worthwhile activity. In this research, an attempt was made to examine the condition of the studied residential complexes from the perspective of sociability. The results showed that Rahan residential complex had the lowest level of connectivity index compared to the rest of the complexes and the largest share of this. The comparison reaches Kasra residential complex. In the meantime, Zeytoun residential complex, then Azadi, Hasht Behesht and Rezvan have the lowest to the highest amount. It can be seen that the public spaces of Rahan residential complex do not have the desired level of connectivity. As the communication increases, the spaces will become more sociable. From the comparison of the complexes based on the interconnection index, we conclude that the location of spaces and accesses in Rahan complex is very weak. Compared to the rest of the complexes, the location of access and communication in Kasra complex is lower. And Rezvan has been suitable and successful. It is said that the increase of connection in public spaces occurs with the increase of sociability.

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بازدید 145

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اطلاعات دوره: 
  • سال: 

    1395
  • دوره: 

    4
  • شماره: 

    1 (پیاپی 13)
  • صفحات: 

    69-79
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    1924
  • دانلود: 

    477
چکیده: 

مقابله با جمینگ از مهم ترین مباحث مطرح در حوزه GPS می باشد. از آن جا که جمینگ موج پیوسته (CW)، متداول ترین نوع جمینگ در این حوزه محسوب می شود، در این مقاله یک روش ترکیبی برای حذف اثر این نوع جمینگ ارائه شده است. روش پیشنهادی یک روش نرم افزاری قابل پیاده سازی در پردازنده دیجیتال گیرنده GPS می باشد که از فیلتر شکاف با پاسخ ضربه نامحدود و نیز تبدیل موجک برای زدودن اثر جمینگ بهره می گیرد. از ویژگی های روش ارائه شده، می توان به دقت بالای مکان یابی و نیز حجم محاسباتی کم (در نتیجه سرعت پردازش بالا) اشاره کرد. نتایج شبیه سازی روی داده های واقعی جمع آوری شده از یک گیرنده تک فرکانسه GPS، نشان می دهد که در حضور جمینگ CW، دقت مکان یابی گیرنده مجهز به سامانه پیشنهادی، مقدار 82.5 درصد نسبت به گیرنده مجهز به سامانه استاندارد، پیشرفت داشته است.

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بازدید 1924

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesدانلود 477 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesاستناد 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesمرجع 0
نویسندگان: 

MUTLU A. | MUTLU B. | USLU E.

اطلاعات دوره: 
  • سال: 

    2009
  • دوره: 

    4
  • شماره: 

    30
  • صفحات: 

    1489-1495
تعامل: 
  • استنادات: 

    1
  • بازدید: 

    91
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

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بازدید 91

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

رادار

اطلاعات دوره: 
  • سال: 

    1397
  • دوره: 

    5
  • شماره: 

    4
  • صفحات: 

    39-48
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    681
  • دانلود: 

    364
چکیده: 

این مقاله به شرح اصول طراحی و ساخت تقویت کننده ی توان در فرکانس 4. 3GHz که متشکل از 3 ماژول 45W است می پردازد. اجزای این تقویت کننده که شامل تقسیم کننده توان، ترکیب کننده توان و ایزولاتر است، به صورت کامل طراحی شده اند. این تقویت کننده در فرستنده ماهواره های مخابراتی کاربرد دارد. برای طراحی تقویت کننده توان 100 واتی از ترکیب سه ترانزیستور TIM4450-60SL شرکت توشیبا استفاده شده است. به منظور شبیه سازی نیز مدار بایاس درین، گیت، ترکیب کننده توان و تقسم کننده توان مایکرواستریپ، در نرم افزار AWR شبیه سازی شده است. طراحی ساده، تکنولوژی بومی، بازدهی بالا و سهولت ساخت از ویژگی های اصلی این طرح می باشد. در ورودی تقویت کننده از یک ایزولاتور استفاده شده است. بنابراین اگر به هر دلیلی ورودی تقویت کننده باز بماند و یا کابل ورودی به خوبی بسته نشده باشد تقویت کننده به نوسان نخواهد افتاد.

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نویسندگان: 

Younus A. | ASIF M. | Umer Azam m. | TUNC C.

اطلاعات دوره: 
  • سال: 

    2021
  • دوره: 

    15
  • شماره: 

    5
  • صفحات: 

    0-0
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    24
  • دانلود: 

    0
چکیده: 

This work furnishes some Hadamard-Hermite (HH) type in-equalities for interval-valued function by using an efficient partial order CW on the space of all compact intervals. It has been shown that the interval-valued HH's inequality proved herein, applied to already de-termined inequalities for real-valued functions. Specifically, this paper unifies and generalizes HH inequalities in the literature. We illustrate results with numerical examples.

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نویسندگان: 

MANDAL A. | MISHRA R.

اطلاعات دوره: 
  • سال: 

    2014
  • دوره: 

    27
  • شماره: 

    10 (TRANSACTIONS A: BASICS)
  • صفحات: 

    1581-1589
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    399
  • دانلود: 

    0
چکیده: 

Radar Signal Processing has been an interesting area of research for realization of programmable digital signal processor using VLSI design techniques. Digital Signal Processing (DSP) algorithms have been an integral design methodology for implementation of high speed application specific real-time systems especially for high resolution radar. In recent times, CORDIC algorithm is turned out to be a huge researched outcome for its easy realizability in on-chip design in the field of vector rotated DSP applications. In this paper, we propose a pipelined CORDIC architecture for digital demodulation in high performance, low power frequency modulated CW Radar. A complex Digital Phase Locked Loop (DPLL) has been used for digital demodulation with pipelined CORDIC module as its core processing element. The FPGA implementation of CORDIC based design has been chosen because of its inherent high throughput of system due to its pipelined architecture where latency is reduced in each of the pipelined stage. Substantial amount of resource utilization has been reduced in proposed design. For better loop performance of first order complex DPLL during demodulation, the convergence of the CORDIC architecture is also optimized. Multiplierless BOXCAR filter has been incorporated at the final stage of the design for better information recovery from narrow samples with little energy signal and easy realization. Hardware synthesized result using Cadence design tools are presented.

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بازدید 399

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اطلاعات دوره: 
  • سال: 

    2011
  • دوره: 

    5
  • شماره: 

    1
  • صفحات: 

    35-39
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    401
  • دانلود: 

    0
چکیده: 

Nonlinear optical properties and quantum yield of DCJ dye (DCM-derived material) has been investigated in order to explore the applications of this material. The magnitude and sign of nonlinear refractive index ( n2) and absorption coefficient (b) of DCJ were measured using a single beam Z-scan technique. DCJ quantum yield has also been measured by a direct technique based on the thermal lens effect. The measured parameters showed that DCJ exhibits strong nonlinear optical properties.

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

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