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Register a new userDetection of the targets which have RF emitter
كشف الأهداف ذات أجهزة البث اللاسلكية
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أحمد الحاج موسى( باحث )
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يعمل الرادار على كشف الهدف و من ثم قياس محدداته، و هذه المحددات هي إحداثيات الهدف التي تشمل المدى و السمت و الارتفاع و سرعة الهدف القطرية، و في بعض التطبيقات مثل رادار الكشف المبكر لا يتم قياس هذه المحددات كافة فلا يتم قياس سرعة الهدف و لا يلزم دقة قياس عالية لبقية المحددات، و لكن في بعض التطبيقات مثل رادارات الملاحقة و التطبيقات التي تتضمن تحديد الهدف و مكان وجوده تتطلب دقة قياس عالية لجميع هذه المحددات. تم في هذه المقالة اكتشاف مكان الهدف من أربعة مواقع جغرافية مختلفة باستعمال التحليل الرياضي و طريقة تحديد المدى و استخدمت البرمجة باستخدام الماتلاب لنمذجة المعادلات الرياضية الناتجة، و محاكاة مكان وجود الهدف و تعيينه ضمن جميع المنظومات الإحداثية الموجودة.
Radar detects the targets and measures its parameters, range, azimuth, height, and velocity of the target. In some application, such as early warning radar we don’t have extremely measure all these parameters, but in other application like detection targets and measures his geo-locations requires high resolution to all these parameters. This paper discusses the feasibility of detecting the location of from four deferent satellites Positions by using of Linear Algebra and pseudo range’s solution, The Matlab was used to solve the four Equations and to simulate the Geo-Positions on Geo-Map
References used
Scerri P. , Glinton R. , scerri D. , and Sycara K. “Geolocation of RF Emitters by Many UAVs” , American Institute of Aeronautics and Astronautics , 2008 , p.13
Fowler, M., “Analysis of Passive Emitter Location with Terrain Data” IEEE Transactions on Aerospace and Electronic Systems, AES-37 (April 2001), 495-507
Ran Ren Mark L. Fowler and N. Eva Wu “ Finding Optimal Trajectory Points for TDOA/FDOA Geo-Location Sensors” , State University of New York at Binghamton , 2009 , pp: 6
Dogancay K.and Hmam H. “ Profile Likelihood Estimator for Passive Scan-Based Emitter Localization” University of South Australia , 2007 IEEE , ICASSP 2007 PP: 1117-1121
Fletcher F. , Ristic B. and Darko M. “Recursive Estimation of Emitter Location using TDOA Measurements from Two UAVs” Australia , 2009 ,pp: 9
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Recent researches consecrate their efforts to overcome multicast network problems by moving all the multicast functions and responsibilities from network layer (routers) to application layer ( terminal nodes (Users)).
Most of Application-Level Multi
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Although the performance of MD-ALM protocol is good, but it is based on membership duration parameter and this makes it more sensitive for the cheating and non-cooperative nodes. The main goal for the cheating nodes is to improve its position in the tree by trying to get the nearest position to the source node and to avoid having any children’s in order to relieve its load by manipulating the membership duration information.
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Phenol derivatives have been reacted with aryl halides under
heterogeneous basic catalyst (Amberlyst-21) using 5 mol% Cu(I)
Complex as catalyst, [CuClPPh3]4. The typical reaction has been
performed between p-cresol and bromobenzene. This reaction
is
achieved in o-xylene as solvent. However, the catalyst complex
does not dissolve in toluene rather it acts as heterogeneous catalyst.
Therefore, it is filtrated at the end of the reaction and reused several
times. Accordingly, new compounds were prepared by reacting one
of the bromoaryl derivatives with paracetamol. It is anticipated that
the synthesized compounds may have pharmaceutical application as
non-steroidial anti-inflammatory drugs (NSAIDs).
Mainstream research on hate speech focused so far predominantly on the task of classifying mainly social media posts with respect to predefined typologies of rather coarse-grained hate speech categories. This may be sufficient if the goal is to detec
t and delete abusive language posts. However, removal is not always possible due to the legislation of a country. Also, there is evidence that hate speech cannot be successfully combated by merely removing hate speech posts; they should be countered by education and counter-narratives. For this purpose, we need to identify (i) who is the target in a given hate speech post, and (ii) what aspects (or characteristics) of the target are attributed to the target in the post. As the first approximation, we propose to adapt a generic state-of-the-art concept extraction model to the hate speech domain. The outcome of the experiments is promising and can serve as inspiration for further work on the task
The Reaction of Glycerol carried out with tow aryl halides
under basic conditions (K2CO3) using 5 mol% of Pd(II)Complex as
catalyst, Pd(PPh3)2Cl2. The typical reaction has been performed
between glycerol and bromobenzene. This reaction is achieved
in
water as solvent. However, the catalyst complex does not dissolve
in aqueous solutions rather it acts as heterogeneous catalyst.
Therefore, it is filtrated at the end of the reaction and reused several
times. Accordingly, new compound were prepared by reacting
glycerol with 1-bromo-2,6-dichlorobenzene. It is anticipated that the
synthesized compounds may have pharmaceutical application.
تلقى اختبار كشف الكذب اهتماما كبيرا منذ زمن بعيد و تتالت التقنيات و الادوات في كل حقبة تاريخة محاولة لانشاء نظام قادر على كشف كذب شخص من صدقه , لما لذلك من استخدامات عديدة أغلبها في كشف الحقيقة في الجرائم و المحاكمات و تنوعت تلك الادوات بداية من مراق
بة ردات معل الجسم و قياس المؤشرات الحيوية للشخص الى اجراء اختبارات نفسية على الاشخاص , و في الآونة الاخيرة تم التوجه الى تقنيات التعلم الآلي و الذكاء الصنعي و في بحثنا هذا نناقش عدة طرق في هذا الصدد "تحليل الكلام , تحليل حركة العيون, تحليل تعابير الوجه.
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