1) EIRDH-P combines public key cryptography and steganography by encrypting images and embedding secret messages within the encrypted images.
2) It involves an Image Provider who encrypts a cover image using public key encryption. A Data Hider then embeds a secret message within the encrypted image.
3) The receiver decrypts the stego-image to extract the secret message and recover the original cover image using their private key.
1) EIRDH-P combines public key cryptography and steganography by encrypting images and embedding secret messages within the encrypted images.
2) It involves an Image Provider who encrypts a cover image using public key encryption. A Data Hider then embeds a secret message within the encrypted image.
3) The receiver decrypts the stego-image to extract the secret message and recover the original cover image using their private key.
Sinusoidal PWM has been a very popular technique used in AC motor control. This is a method that employs a triangular carrier wave modulated by a sine wave and the points of intersection determining the switching points of the power devices in the inverter.
Pulse width modulation (PWM) is a method of changing the duration of a pulse with respect to the analog input. The duty cycle of a square wave is modulated to encode a specific analog signal level. This pulse width modulation tutorial gives you the basic principle of generation of a PWM signal. The PWM signal is digital because at any given instant of time, the full DC supply is either ON or OFF completely. PWM method is commonly used for speed controlling of fans, motors, lights in varying intensities, pulse width modulation controller etc. These signals may also be used for approximate time-varying of analogue signals. Below you can see the pulse width modulation generator circuit diagram (pulse width modulator) using op amp. PWM is employed in a wide variety of applications, ranging from measurement and communications to power control and conversion. Pulse width modulation dc motor control is one of the popular circuits in Robotics.
This document summarizes various pulse modulation techniques including:
- Pulse-amplitude modulation (PAM) where the carrier amplitude changes with the message signal amplitude.
- Pulse-duration modulation (PDM) where the carrier width changes with the message signal amplitude.
- Pulse-position modulation (PPM) where the carrier position changes with the message signal amplitude.
- Digital pulse modulation techniques like pulse code modulation (PCM) and differential PCM (DPCM) are also discussed. Advantages and disadvantages of each technique are provided.
The chapter discusses various types of pulse modulation techniques including pulse amplitude modulation (PAM), pulse width modulation (PWM), pulse position modulation (PPM), and pulse code modulation (PCM). PAM varies the amplitude of pulses based on the analog signal, PWM varies the width of pulses, PPM varies the position of pulses, and PCM converts the analog signal to a digital code using sampling and quantization. Digital communication through pulse modulation offers advantages like easier reception, less signal corruption over distance, ability to clean up noise and amplify signals, security through coding, and ability to store signals.
Pulse modulation techniques can encode an analog signal for transmission. This document discusses several techniques including:
- Pulse-amplitude modulation (PAM) which varies pulse amplitudes based on sample values of the message signal.
- Pulse code modulation (PCM) which assigns a binary code to each analog sample. PCM is commonly used in digital communications systems.
- Delta modulation which transmits one bit per sample indicating if the current sample is more positive or negative than the previous. It requires higher sampling rates than PCM for equal quality.
قلاب سازی در تحلیل بدافزارهاHooking in Malware AnalysisM Mehdi Ahmadian
قلاب سازی ، یک مفهوم برای به دست آوردن کنترل جریان اجرایی برنامه بدون تغییر و کامپایل مجدد کد منبع آن است .
توسط متوقف سازی فراخوانی تابع و هدایت مجدد آن به کد سفارشیشده ، به دست میآید.
با تزریق کد سفارشی ، هر عملیاتی را میتوان اجرا نمود . پسازآن ، قابلیتهای اصلی تابع می تواند اجراشده و نتیجه میتواند یا بهسادگی برگشت داده شود و یا تغییر داده شود
محمد مهدی احمدیان
Introduction to Computer Science and Programming with FORTRAN, Amirkabir University of Technology (Tehran Polytechnic), Department of Materials and Metallurgical Engineering , Amin Jafari-Ramiani
آموزش مدل سازی قطعات مکانیکی و مکانیزم ها در نرم افزار جهت افزایش سرعت و دقت لازم برای فرآیندهای طراحی و ساخت، تعمیرات و مهندسی معکوس و افزایش دقت و سرعت لازم برای فرایندهای مهندسی تهیه شده است.
سرفصل هایی که در این آموزش به آن پرداخته شده است:
درس یکم: معرفی و آشنایی کلی با فضای نرم افزار
درس دوم: ایجاد طرح دو بعدی
درس سوم: ایجاد طرح سه بعدی
درس چهارم: مونتاژ قطعات ( Assembly)
...
برای توضیحات بیشتر و تهیه این آموزش لطفا به لینک زیر مراجعه بفرمائید:
http://faradars.org/courses/fvmec94082
Sinusoidal PWM has been a very popular technique used in AC motor control. This is a method that employs a triangular carrier wave modulated by a sine wave and the points of intersection determining the switching points of the power devices in the inverter.
Pulse width modulation (PWM) is a method of changing the duration of a pulse with respect to the analog input. The duty cycle of a square wave is modulated to encode a specific analog signal level. This pulse width modulation tutorial gives you the basic principle of generation of a PWM signal. The PWM signal is digital because at any given instant of time, the full DC supply is either ON or OFF completely. PWM method is commonly used for speed controlling of fans, motors, lights in varying intensities, pulse width modulation controller etc. These signals may also be used for approximate time-varying of analogue signals. Below you can see the pulse width modulation generator circuit diagram (pulse width modulator) using op amp. PWM is employed in a wide variety of applications, ranging from measurement and communications to power control and conversion. Pulse width modulation dc motor control is one of the popular circuits in Robotics.
This document summarizes various pulse modulation techniques including:
- Pulse-amplitude modulation (PAM) where the carrier amplitude changes with the message signal amplitude.
- Pulse-duration modulation (PDM) where the carrier width changes with the message signal amplitude.
- Pulse-position modulation (PPM) where the carrier position changes with the message signal amplitude.
- Digital pulse modulation techniques like pulse code modulation (PCM) and differential PCM (DPCM) are also discussed. Advantages and disadvantages of each technique are provided.
The chapter discusses various types of pulse modulation techniques including pulse amplitude modulation (PAM), pulse width modulation (PWM), pulse position modulation (PPM), and pulse code modulation (PCM). PAM varies the amplitude of pulses based on the analog signal, PWM varies the width of pulses, PPM varies the position of pulses, and PCM converts the analog signal to a digital code using sampling and quantization. Digital communication through pulse modulation offers advantages like easier reception, less signal corruption over distance, ability to clean up noise and amplify signals, security through coding, and ability to store signals.
Pulse modulation techniques can encode an analog signal for transmission. This document discusses several techniques including:
- Pulse-amplitude modulation (PAM) which varies pulse amplitudes based on sample values of the message signal.
- Pulse code modulation (PCM) which assigns a binary code to each analog sample. PCM is commonly used in digital communications systems.
- Delta modulation which transmits one bit per sample indicating if the current sample is more positive or negative than the previous. It requires higher sampling rates than PCM for equal quality.
قلاب سازی در تحلیل بدافزارهاHooking in Malware AnalysisM Mehdi Ahmadian
قلاب سازی ، یک مفهوم برای به دست آوردن کنترل جریان اجرایی برنامه بدون تغییر و کامپایل مجدد کد منبع آن است .
توسط متوقف سازی فراخوانی تابع و هدایت مجدد آن به کد سفارشیشده ، به دست میآید.
با تزریق کد سفارشی ، هر عملیاتی را میتوان اجرا نمود . پسازآن ، قابلیتهای اصلی تابع می تواند اجراشده و نتیجه میتواند یا بهسادگی برگشت داده شود و یا تغییر داده شود
محمد مهدی احمدیان
Introduction to Computer Science and Programming with FORTRAN, Amirkabir University of Technology (Tehran Polytechnic), Department of Materials and Metallurgical Engineering , Amin Jafari-Ramiani
آموزش مدل سازی قطعات مکانیکی و مکانیزم ها در نرم افزار جهت افزایش سرعت و دقت لازم برای فرآیندهای طراحی و ساخت، تعمیرات و مهندسی معکوس و افزایش دقت و سرعت لازم برای فرایندهای مهندسی تهیه شده است.
سرفصل هایی که در این آموزش به آن پرداخته شده است:
درس یکم: معرفی و آشنایی کلی با فضای نرم افزار
درس دوم: ایجاد طرح دو بعدی
درس سوم: ایجاد طرح سه بعدی
درس چهارم: مونتاژ قطعات ( Assembly)
...
برای توضیحات بیشتر و تهیه این آموزش لطفا به لینک زیر مراجعه بفرمائید:
http://faradars.org/courses/fvmec94082
The document discusses using genetic algorithms and memetic algorithms to optimize wireless sensor network design parameters for energy efficiency while meeting application requirements. It proposes encoding sensor network characteristics and applying genetic operators to minimize energy use and maximize sensing uniformity over time. A memetic algorithm hybridizes this genetic algorithm with local searches that change sensor operating modes based on battery thresholds to further improve energy conservation. Evaluation shows the memetic algorithm enhances network lifetime compared to the genetic algorithm alone.
This document contains assembly code macros and variables for a game involving planes, ships, and helicopters on different levels. It defines macros for drawing graphics, handling input, random number generation, and dynamic movement of objects. Variables track positions, speeds, and statuses of objects and the level parameters. The code implements game logic and object behavior through calls to the macros.