Journal of Modeling and Simulation in Electrical and Electronics Engineering
Volume:2 Issue: 2, Spring 2022

Image forgery, the manipulation of an image to hide some meaningful or helpful information, is widely used to manage the large amount of information being exchanged in the form of images. There are different forms of image forgery, and copy--move forgery is the most common form of it. The copy-move forgery is easy to perform yet challenging to detect due to the similarity between the original part of the image and the copied part. In this paper, we employ a keypoint descriptor inspired by the human visual system, namely the FREAK (Fast Retina Keypoint) descriptor, for robust copy-move forgery detection. This method uses the advantages of FREAK descriptor such as fast computing and low memory load compared to SIFT, SURF, and BRISK. Finally, geometric transformation parameters are extracted and discussed. Results confirm promising results in the case of image post-processing operations such as adding noise, illumination change, and geometric transformations such as rotation and scaling.

A balun Low Noise Amplifier (Balun-LNA) with technique of gm-boosting feedback and a modified current bleeding (CBLD) circuit is proposed for application in the tuner of digital television (DTV) and other wideband radio and microwave receivers. Using the technique of gm-boosting feedback causes input impedance matching to not just depend on the CG transistor, and input impedance matching is satisfied by the transconductance of CG and CS transistors. Therefore, the transconductance of the CG transistor increases to boost the differential voltage gain of Balun-LNA and decrease its NF. Also, a modified current bleeding circuit is used in the CS stage in order to make the CS transistor have higher transconductance and its output current be identical to the output current of the CG stage. To compensate for having identical output currents, symmetrical loads are used in differential output so that they cause the gain and phase balance at the differential output. This Balun-LNA is built on 90-nm CMOS technology and operates in the digital television frequency band of 48 to 864 MHz. This Balun-LNA achieves a maximum differential voltage gain of 24 dB, an input return loss of less than -10 dB, and a minimum NF of 5 dB. This Balun-LNA works at 2.8 v nominal supply voltage and consumes the power of 2.5 mW.

3D mesh simplification is an important challenge in various fields. While different simplification methods have been proposed in recent years, the focus has shifted to keeping properties such as ridges and valleys along with mesh simplification. While most of the proposed models have used curvature, some challenges exist, such as the computational complexity and sensitivity to the neighborhood size. The latter can be solved by averaging several neighborhoods. This paper proposes a simple yet fast method with less sensitivity to the neighborhood size. To this end, we use the normal vector and the parameters of a probability distribution of its variations to detect the elevations, depressions (geometrical changes), and curve parts. We combine this method with the Quadric Error Metric (QEM) method to produce a hybrid method for 3D mesh simplification, preserving its elevations and depressions. Evaluation results show that our method has a lower error than the other methods.

Substrate Integrated Waveguide (SIW) technology by application of the planar construction process obtains a catchy means for integrating planar and nonplanar circuits. Further, it is hard to realize the negative coupling needed to create a compact quasi-elliptic bandpass filter based on a single-layered SIW structure. The presented work proposes a specific planar and negative coupling configuration that provides two transmission zeroes at 5.03 GHz and 6.26 GHz. This article presents a fourth-order quasi-elliptic filter. The proposed filter is also wide-band. This structure is implemented in SIW knowledge. The SIW filter has a central frequency of 5.5 GHz. The perfect bandwidth is 0.7 GHz. It is realized on a single-layer substrate from Rogers Ro4003. The Thickness of the substrate is considered as 0.508 mm. The measured outcomes of this filter, which show an excellent selectivity, and a low insertion loss of about 1.9 dB, agree suitably with simulation results. The designed filter's innovation provides these features: compact, low cost, wide-band, good selectivity, low insertion loss, and agreement between simulation and fabrication.

In this study, the technology of Linear Permanent Magnet Vernier Electric Machines (LPMEVMs) is reviewed. Since the introduction of the first LPMVM designs, many designs have been proposed, and many researchers have come up with different ideas. The new LPMEVM technology has attracted the attention of many researchers, so with the efforts of researchers, it can be used in industrial applications of this machine and will be welcomed by craftsmen shortly. In the following, this article examines the work done in the field of LPMVM. In this study, the articles presented in this field are generally reviewed, the new technologies presented, and the structures have been analyzed by researchers and mentioned in the articles. Detailed more precisely on the structures presented and designs made for different parts of the machine, including the mover and translator, which include fixed and moving parts in the LPMV machine, the shape of the grooves and teeth, and the placement of permanent magnets and coils, will be discussed in this paper. This research discusses the designs presented in this LPMV machine and paves the future research path.

Renewable energy generations depend on environmental conditions, and often don't coincide with energy consumptions. In addition, uncontrolled charging of electric vehicles (EVs) leads to technical problems in the grid and economic inefficiency for EVs owners. In this paper, a bi-level energy management algorithm is presented for a distribution network consisting of EVs and renewable energy generations at high penetration level. Energy management at the distribution network level is done centrally by distribution system operator (DSO). In the second level, the parking operator is responsible for providing EVs energy. The parking operator uses the difference in energy prices between the time steps to determine the level of power exchange between EVs and the distribution network in order to reduce the cost of providing energy for EVs in the parking lot. The proposed algorithm coordinates the charging and discharging of EVs with the network conditions and the output of renewable generations while provides financial benefits for vehicle owners. The results indicate the proposed bi-level energy management has been able to use the freedom of the EVs to balance the power of the network and support renewable generations as well as increase the financial benefits of EVs owners.

Cancer is one of the leading causes of death worldwide and the third cause of death in Iran after cardiovascular diseases and driving incidents. Therefore, having models that can describe and explain the process of cancer treatment is vital. One novel method for cancer treatment is to combine chemotherapy and immunotherapy. The purpose of immunotherapy is to enhance the body's immune system and reduce chemotherapy's side effects. Different models have been presented. The significance of the models is to understand the effect of each element on the treatment process. This article concerns the implementation of chemotherapy-immunotherapy cancer treatment in the Simulink toolbox of Matlab.  Following the implementation of the model, the impact of chemotherapy, immunotherapy, and the combined technique on cancer cell growth is assessed. Simulating with Simulink allows for a graphical explanation as well as the ability to explain the hierarchy and effect of each piece. As a result, it may be advantageous for educational purposes. Simulink Toolboxes such as optimization, signal processing, and system identification allow us to analyze and control the cancer model.