Ahmadreza Talebian Assistant Professor of Non-Executive Defense Organization of Self-Sufficiency Research and Jihad, Tehran, IRA author text article 2023 per The advancement of technology and the use of modern and intelligent weapons has led to the creation of a more complex and destructive nature of weapons in possible future wars and has made it more necessary to pay serious attention to the application of passive defense measures against the threat factors of sensitive and vital centers, which in the research The present study, which is of an applied-developmental type and is carried out by a mixed method, the main issue, "what are the passive defense measures against the threat factors of radar systems in future wars" is considered and based on the studies and interviews conducted with experts, the number of 15/15 A threat has been identified in the field of radar detection systems in future wars and using new methods from the 14/14 principles of passive defense (camouflage and invisibility; concealment using natural effects; deception and initiative; coverage in all fields; miniaturization; blinding of information systems; choosing the optimal scale of dispersal; strengthening, fortifications and security; positioning of systems deployment; defense crisis management; dispersion in the distribution of radar stations; selection of safe areas; parallelization of systems and information protection) in order to improve the immunity of radar systems against these threats. Khatam Al-Anbia Air Defense Academy 2821-1553 2 v. 1 no. 2023 1 26 https://jasd.khadu.ir/article_80_f033ab37c30201f73f142449d037028d.pdf حسن صالحی مدیر گروه مواد و پدافند غیرعامل، دانشکده مهندسی مکانیک، دانشگاه پدافند هوایی خاتم‌الانبیاء(ص) author text article 2023 per In this paper, the efficiency of the bedrock grain's characteristics on the performance of its layers was investigated. For this purpose, experimental and numerical studies were performed using ABAQUS software in both static and dynamic conditions. The performances of the geogrid layers in various types of soils by different values of elastic modulus and frictional angles were investigated. It was observed that increasing soil adhesion at a constant concentration, enhanced loading capacity, and reduced the reinforcing efficiency. Study on different soil types by various specifications showed that for soil substrates by values of elastic modulus of 10, 50 and 100 MPa, the effects of the layers of the reinforcement on improving the Settlement were about 75%, 65% and 54%, respectively. In dynamic loading mode, the performance of the reinforcement layers increased compared to static loading, and the improvements of the Settlement were 79%, 72% and 54%, respectively. Khatam Al-Anbia Air Defense Academy 2821-1553 2 v. 1 no. 2023 27 51 https://jasd.khadu.ir/article_61_7f39f8317fbdb1988ef4c628eba02591.pdf Esmaeil zarezadeh Assistant Professor of electronic, Faculty of Basic Sciences, Khatam Al-Anbia Air Defense University, Tehran, Iran author Ali shirpaei Assistant Professor of Physics, Faculty of Basic Sciences, Khatam Al-Anbia Air Defense University, Tehran, Iran author Seyed Moin Alavi Master's Degree in Electrical Engineering from Amirkabir University author text article 2023 per The use of broadband pulses in structures based on phase shift antenna arrays is difficult due to the Luchi beam phenomenon. Therefore, as an alternative method, structures based on the real time delay of photonic microwave technology are used, which increases the usable bandwidth. However, the use of conventional photonic microwave technology and the conditions related to its modulator, itself causes the limitation of bandwidth and pulse level. In this article, the performance of a real time delay structure has been improved by using a special type of optical fibers under the physical phenomenon of modulation instability, which increases the pulse power level and bandwidth. In fact, the performance improvement of a modulator with a single laser (carrier signal) was extended to the frequency comb mode. Khatam Al-Anbia Air Defense Academy 2821-1553 2 v. 1 no. 2023 52 72 https://jasd.khadu.ir/article_64_ea5d2f1c4608232e07d3aa3d998e5135.pdf Omid Jafarizadeh استادیاردانشگاه پدافند هوایی خاتم الانبیاءدانشکده کنترل و فرماندهی-تهران -ایران author Hossein Fathabadi Member of the academic staff of Khatam al-Anbia Air Defense University (pbuh) - Tehran - Iran author text article 2023 per Khatam Al-Anbia Air Defense Academy 2821-1553 2 v. 1 no. 2023 73 97 https://jasd.khadu.ir/article_63_03afdbd66e7929b125f8597834fa83a4.pdf Ali Jahedsaravani Electrical Engineering Faculty, Khatam al-anbiya air defense university author Majid Zarie Electrical Engineering Faculty, Khatam Al-anbiya Air defense university author Javad Ranjbar Electrical Engineering Faculty, Khatal al-Anbiya Air Defense University author text article 2023 per Automatic tracking systems of flying targets play a key role in the battle field. Nowadays, vision sensors have attracted wide attention due to their outstanding features such as being cheap, passive, and their resistant to jamming in comparison to expensive radar-based tracking system which prone to jamming. In this paper, a system is considered and designed for automatic tracking of flying targets using segmentation and digital image processing. In the first section, images of flying targets are proceed using color image segmentation algorithm through Kmeans and FCM clustering techniques and then desired target is detected. In following, edges of images are detected using Prewitt algorithm and then desired object is identified and tracked. Visual results of developed techniques are similar and have sufficient accuracy but, speed of automatic tracking using edge detection is higher in comparison to color image segmentation and so its performance in battle field and online tracking of flying targets is preferred. Khatam Al-Anbia Air Defense Academy 2821-1553 2 v. 1 no. 2023 98 113 https://jasd.khadu.ir/article_66_3295c76acbf4caaed33c36b1b5fc2cb1.pdf رضا بیات گروه ریاضی/دانشکده علوم پایه/دانشگاه پدافند هوایی خاتم الانبیاء (ص)/تهران/ایران author علیرضا قنبری دانشکده علوم پایه، دانشگاه پدافند هوایی خاتم الانبیاء )ص(، تهران، ایران author مصطفی کافی مقدم ، دانشکده علوم پایه، دانشگاه بیرجند، بیرجند، ایران author text article 2023 per در این مقاله قصد داریم با استفاده از الگوریتم ابتکاری پیشنهادی، به موضوع مسیریابی اجسام پرنده ماننده پهپاد، موشک و ... بپردازیم. بدین منظور، الگوریتم ابتکاری برخط دقیقی ارائه شده است که بهترین مسیر بدون برخورد به موانع را برای هدایت یک شی‌ء پرنده جهت رهگیری و رسیدن به هدف ارائه می‌کند. شرایط محیطی به‌گونه‌ای فرض شده است که در آن، یک شی‌ء پرنده راجع‌به محیطی که در آن قرار دارد، شناخت قبلی ندارد و از طریق حسگرهای تعبیه شده در آن، که دارای محدودیت ناحیه کاوش می‌باشند به شناخت محیط اطراف خود می‌پردازد. موانع موجود می‌توانند ثابت یا متحرک درنظر گرفته شوند و حرکات آن‌ها نیز برای شی‌ء پرنده، ناشناخته باشد و همچنین می‌توانند به اشکال مختلف هندسی باشند. نهایتا، شی‌ء پرنده باید به هدف ثابتی برسد که توسط آن قابلیت دست‌یابی داشته باشد. همچنین کارایی الگوریتم پیشنهادی در حالتی‌که شی‌ء پرنده باید با یک فاصله اطمینان مشخص از یک فضای امنیتی یا ممنوعه، اجتناب و عبور نماید نیز سنجیده خواهد شد. Khatam Al-Anbia Air Defense Academy 2821-1553 2 v. 1 no. 2023 114 129 https://jasd.khadu.ir/article_65_fc490ca45c00b1249bbe3554a4fdf6fb.pdf