Computer Aided Engineering Research Papers (original) (raw)

2025, Computer-Aided Design

2025, Applied Acoustics

A computer-aided-engineering (CAE) method is used for noise reduction in a truck cab interior. The ®nite element (FE) and the boundary element method (BEM) are used to characterize the acoustic ®eld of a truck cab interior in terms of the natural frequencies and the mode shapes. Structural vibration responses of the cab are computed for excitations at the cab mounts in a frequency range from 50 to 250 Hz. Interior noise levels at the driver's right ear are determined using the boundary element method for excitations at the cab mounts. A panel acoustic contribution analysis (PACA) is done to determine the structural areas of the cab contributing most to the noise levels at the driver's right ear. Structure-borne noise is reduced in the interior of the cab by selection and placement of sound absorbing material at the appropriate locations in the cab, as determined by PACA.

2025, International Journal of Embedded Systems and Applications

In engineering education, the combination with theoretical education and practical education is an essential problem. The taught knowledge can be quickly forgotten without an experimental application. In addition, the theoretical knowledge's cannot be easily associated applications by students when they start working in industry. To eliminate these problems, a number of education tools have been developed in engineering education. This article presents a modelling, simulation and practice study of a newly designed liquid level training set developed for the control engineering students to simulate, examine and analyze theoretically and experimentally the controllers widely used in the control of many industrial processes. The newly designed training set combines two control structures, which are a computer-based control and a digital signal processing-based control. The set displays the results related to experiments in real time as well as. These features have made it a suitable laboratory component on which the students can both simulate and test the performance of liquid level control systems by using theoretical different control structures.

2025

This paper discusses model making approaches in the design process and also classifies broadly the different types of physical models and prototypes. It also describes the fundamental principles of different methods of model making and prototyping and questions how they can be used in the conceptual and detailing design stages of the design process. The first part of this paper explains how physical model and prototypes are classified and why it is so important for gaining a better understanding of the designed product in terms of usability and technical functionality. The second part of this paper focuses more specifically on how these tools are helpful or restrictive in facilitating the creation of ideas, concepts and detailed design solutions following the various stages of the design process. Finally a user-centered and cost-efficiency design perspective will be discussed with respect to what extent models and prototypes are able to facilitate design changes throughout the different stages of the design process.

2025, IEEE Intelligent Systems & Their Applications

2025, Advances in engineering education

Our full-year capstone design course, "Mechanical and Manufacturing Engineering Design Methodology and Application" focuses on both design methodology and design application. We redesigned the course to more effectively prepare students for the "application" aspect of design. The approach was essentially to implement a short inquiry-based learning exercise that was augmented by web-based teaching modules. This blended learning approach gave the students an immediate sense of team dynamics and project management skills necessary to complete this short exercise (and their year-long project). This paper discusses the design, testing, application and results of this two week design project and focuses specifically on mindmapping freeware. There will also be a discussion of how this project will be made accessible via an e-learning engineering design portal, which houses many projects such as the one described above.

2025, SIAM Journal on Numerical Analysis

Convolving the output of Discontinuous Galerkin (DG) computations with symmetric Smoothness-Increasing Accuracy-Conserving (SIAC) filters can improve both smoothness and accuracy. To extend convolution to the boundaries, several one-sided spline filters have recently been developed. We interpret these filters as instances of a general class of position-dependent spline filters that we abbreviate as PSIAC filters. These filters may have a non-uniform knot sequence and may leave out some B-splines of the sequence. For general position-dependent filters, we prove that rational knot sequences result in rational filter coefficients. We derive symbolic expressions for prototype knot sequences, typically integer sequences that may include repeated entries and corresponding B-splines, some of which may be skipped. Filters for shifted or scaled knot sequences are easily derived from these prototype filters so that a single filter can be re-used in different locations and at different scales. Moreover, the convolution itself reduces to executing a single dot product making it more stable and efficient than the existing approaches based on numerical integration. The construction is demonstrated for several established and one new boundary filter.

2025, Progress In Electromagnetics Research B

We consider the benchmark problem of magnetic energy density enhancement in a small spatial region by varying the shape of two symmetric conducting scatterers. We view this problem as a prototype for a wide variety of geometric design problems in electromagnetic applications. Our approach for solving this problem is based on shape optimization and isogeometric analysis. One of the major difficulties we face to make these methods work together is the need to maintain a valid parametrization of the computational domain during the optimization. Our approach to generating a domain parametrization is based on minimizing a second order approximation to the Winslow functional in the vicinity of a reference parametrization. Furthermore, we enforce the validity of the parametrization by ensuring the non-negativity of the coefficients of a B-spline expansion of the Jacobian. The shape found by this approach outperforms earlier design computed using topology optimization by a factor of one billion.

2025, Computer Methods in Applied Mechanics and Engineering

We consider a model problem of isogeometric shape optimization of vibrating membranes whose shapes are allowed to vary freely. The main obstacle we face is the need for robust and inexpensive extension of a B-spline parametrization from the boundary of a domain onto its interior, a task which has to be performed in every optimization iteration. We experiment with two numerical methods (one is based on the idea of constructing a quasi-conformal mapping, whereas the other is based on a spring-based mesh model) for carrying out this task, which turn out to work sufficiently well in the present situation. We perform a number of numerical experiments with our isogeometric shape optimization algorithm and present smooth, optimized membrane shapes. Our conclusion is that isogeometric analysis fits well with shape optimization.

2025, Proceedings of 23rd …

We look at some succesfull examples of shape optimisation using isogeometric analysis. We also addresses some problems which we encountered.

2025

Kutatásainkat elsősorban a mágneses vékonyrétegeknek és nanoszerkezeteknek a nagysűrűségű adattárolásban való alkalmazhatósága valamint az alkalmazások alapjait jelentő fizikai jelenségek megértése motiválta. A relativisztikus hatások, közöttük is elsősorban a spin-pálya kölcsönhatás, számos jelenségben meghatározóak, mint pl. a mágneses anizotrópia, különböző reorientációs fázis átalakulások vagy a domén-falak képződése, amelyek fontosak pl. a merőleges mágneses adattároló anyagok (PMRM, perpendicular magnetic recording media) tervezésében is. A jelen pályázat szerves folytatása az OTKA 2002-ben lezárult T030240 nyilvántartási számú projektjének, amelyenek Dr. Szunyogh László volt a témavezetője. Az e projekt keretein belül alkalmazott eljárásokat használtuk fel kuatásaink során illetve fejlesztettük tovább. A szerződésben a következő főbb kutatási program pontokat adtuk meg: 1. Mágneses vékonyrétegek -Co/Cu(100), Fe/Cu(100) -magnon spektrumának és mágneses anizotrópiájának meghatározása különböző rétegvastagság esetén. Ugyanezen rendszerek Curie hômérsékletének vizsgálata a rétegszám függvényében a spinhullám közelítés segítségével. A témakörben 7 publikáció született: [4,3,9,20,22,23,26] 2. Réteges szerkezetű ferromágneses anyagokban -CoPt, CoPt3 -mágneses doménfalak vastagságának first principles meghatározása. Megvizsgáljuk a doménfal szerkezetének eltéréseit a fenomenologikus modell által jósolt szerkezettől. Transzport tulajdonságok meghatározása a doménfalon kersztül. A témakörben 7 publikáció született: [2,

2025, Concurrent Engineering

The reusability of design processes modeled in existing Product Lifecycle Management (PLM) and Computer Aided Engineering (CAE) frameworks has been limited to the level of flow charts or activity-based diagrams that serve as planning and organizational aids. Current simulation-based design frameworks provide limited support for reuse of design processes at a level where design processes are networks of computational operations, specifically the capabilities to reuse (a) design processes for different products, and (b) collaborative design strategies. In this article, we address these limitations by providing a modeling approach for simulation-based design processes so that they can be archived in a generic modular fashion and reused for collaborative design of different products. The proposed approach is based on four foundations: (a) modeling design processes as hierarchical systems, (b) separation of declarative and procedural information, (c) modeling design processes as decision...

2025, Borsod Bos 2004 Kft. Innovatív, nagy hatékonyságú termomechanikus előkezelési eljárás kutatása és fejlesztése nagy teljesítményű beton termékek gyártásához

A Borsod-Bos 2004 Kft. mechanikusan és termikusan aktivált hulladék alapanyagok felhasználásával saját fejlesztésű, de a piacon ma is elérhető statikai tulajdonságokkal bíró betonelemek gyártástechnológiáját fejlesztette ki kutatás-fejlesztési projektje keretében. A projektben felhasznált erőműi pernye- és salak, bányameddő, perlit és hulladék beton alapanyagokat nagy teljesítményű őrléssel aktiváltuk, majd a különböző részecskeméretű frakciókat beton töltőanyagként teszteltük. Annak érdekében, hogy elérjük azt a nyomószilárdságot, amit hagyományos úton cementkötéssel elérhetünk egy C25-C30-C35 betonterméknél, a mechanikai kezelést egy termikus aktiválással egészítettük ki, melynek során elértük, hogy a betontermékek kevesebb cement felhasználásával is megfelelő nyomószilárdsággal voltak jellemezhetőek. A mechanikai előkezelés után egyes adalék anyagainkat betonipari tulajdonság javító szerekkel is aktiváltuk, és vizsgáltuk ezek hatását a késztermékekre. Az öntési kísérleteket a Borsod-Bos 2004 Kft. Igriciben lévő telephelyén végeztük, a nyomószilárdság méréshez készített próbakockákon kívül térkövek és zsalukövek formájában.

2025, 2009 Innovative Technologies in Intelligent Systems and Industrial Applications

We have demonstrated the impact of developments in nanotechnology to Hard Disk Drive (HDD) technology. We have put forth a proposition to enhance the modeling of future storage devices based on innovations in the field of Nanotechnology and MEMS. We have elucidated the influence of recent advances of Nano-Composites, MEMS (Micro Electro Mechanical Systems) etc. and their implications towards the development of storage devices in the future. We have discussed about reliability modeling, nano-physics modeling and thin-film polymer modeling of HDD technology on computer-aided engineering tools such as MATLAB. We have also devised a design of Nanotechnology and MEMS enabled future HDD. We have given a small model for array based MEMS cantilevers for HDD and have used SUGAR MEMS simulation library in MATLAB to model it. We have included the parameters to be kept in mind while modeling a HDD in light of the innovations in Nanotechnology and MEMS. Finally we have stated the working of a MEMS-based actuator and presented its reliability modeling.

2025, Korea-Australia Rheology Journal

Plastic injection molding has been widely used in the past and is a dominant forming approach today. As the customer demands require materials with better engineering properties that were not feasible with polymers, powder injection molding with metal and ceramic powders has received considerable attention in recent decades. To better understand the differences in the plastic injection molding, metal injection molding, and ceramic injection molding, the effects of the core process parameters on the process performances has been studied using the state-of-the-art computer-aided engineering (CAE) design tool, PIMSolver ® The design of experiments has been conducted using the Taguchi method to obtain the relative contributions of various process parameters onto the successful operations.

2025

The integration of artificial intelligence (AI) into software development processes has become a significant trend, promising to enhance productivity, code quality, and decision-making. However, applying AI-based guidance to complex and legacy codebases presents several unique challenges. These challenges stem from issues such as code structure, technical debt, outdated frameworks, and a lack of standardized documentation. Legacy systems, often built with older programming languages or obsolete tools, can make the seamless implementation of AI tools and frameworks more difficult. This article explores these challenges in depth and offers practical solutions for overcoming them. By examining the key obstacles-such as dealing with unstructured code, understanding legacy architecture, and ensuring AI models' adaptability-this research provides a roadmap for developers and organizations looking to leverage AI in maintaining and evolving their legacy systems. Ultimately, it aims to provide insights on how AI guidance can be effectively integrated into existing codebases to improve long-term development efficiency, scalability, and code quality.

2025

As organizations strive to modernize their IT infrastructure, legacy and complex codebases present significant challenges. These systems, often outdated and rigid in structure, are integral to many enterprises but are increasingly difficult to maintain and evolve with traditional methods. Artificial Intelligence (AI) offers an opportunity to unlock new potential in managing these systems, providing intelligent guidance, automating routine tasks, and optimizing legacy code. However, applying AI to these legacy systems presents its own unique set of challenges, including poor documentation, outdated technologies, and complex interdependencies. This paper explores the strategies for successfully integrating AI into legacy and complex codebases, focusing on techniques such as code refactoring, AI model customization, hybrid human-AI approaches, and continuous learning. The goal is to provide developers and organizations with a roadmap to harness AI's power in modernizing and maintaining legacy code, ensuring long-term sustainability and efficiency.

2025, CAHT Evolution

Convolutional Neural Networks with attention mechanisms have proven to be an essential computational tool for sign recognition. After summarizing the state of the art on the subject, we justify our intention to combine CNN, attention mechanisms and Deep Learning to design an embedded application for smartphones and tablets to read, decipher and translate hieroglyphic texts on the fly.

2025, International Journal of Computer Applications

This paper describes the collection of ECG signal using three lead set-up and further removal of noise with filtrations. Being low frequency signals, the ECG facilitate the filtration of most of the high frequency noise. The circuit, for collection of signals and removal of noise, can be controlled and supervised from any remote location using web publishing tool, available in LabVIEW. Interface of hardware and software is carried out by making use of NI ELVIS kit.

2025

A two-dimensional axi-symmetric numerical
model is developed in order to understand the
characteristics of diffused vacuum arc. Vacuum arcs
mainly consist of metal vapors which are generated by
local evaporation of the contact material due to higher
current densities. Strong coupling and high gradients
between many parameters like, current densities,
temperatures, electrical conductivity, magnetic field and
high velocities of plasmas pose many challenges in
modeling vacuum arcs. Present work consists of solution of
two-fluid equations for electrons and ions. In addition to
fluid equations, Maxwell's equations are solved to obtain
the Lorentz force and Joule heat which are implemented as
source to momentum and energy equations respectively.
Simulation results show the variation of the ion and
electron number densities, their temperatures, velocities
and magnetic flux.

2025, Lecture Notes in Computer Science

2025, 17th International Conference on Computing in Civil and Building Engineering (ICCCBE). Tampere, Finland

Since the early nineties, there have been major studies carried out to learn the behaviour and performance of composite structures exposed to fire. It is essential that structural members maintain their integrity and load bearing capacity under elevated temperature for an adequate duration to allow building occupants to escape and for any firefighting and rescue operation to take place safely. The recently published joint Australia/New Zealand Standard 2327:2017 incorporates a major section on the design and analysis of two-way composite steel-concrete floor systems for fire resistance. The input parameters required for the calculations include the building geometry and fenestration, design loading, and details of structural members. Conventionally, collating the data is a laborious, inefficient, and error-prone data gathering process that is undertaken manually from drawings and other paperbased documentation prior to the actual analysis. The uptake of ISO standard BIM (Building Information Modelling) has gained a rapid momentum in the industry in recent years. This means more and more architectural and engineering design information will become accessible for sharing with downstream design and analysis applications. This paper investigates what type of information is available from BIM that can be transferred to dedicated software tools for the analysis of composite structures. Additionally, the paper describes the potential application of an open standard legal knowledge model for sharing design parameters prescribed by normative standards. A worked example has been selected to illustrate the data exchange requirements and highlight challenges.

2024

The development of secure firmware with advanced error-checking and flash storage techniques is critical to ensuring the integrity and reliability of modern embedded systems. Firmware serves as the essential software layer between hardware components and the operating system, making it a target for potential vulnerabilities. This paper explores the implementation of security-focused firmware design that incorporates robust encryption, authentication protocols, and access control mechanisms to protect devices from unauthorized tampering and cyber threats. Additionally, it emphasizes the importance of integrating error-checking algorithms, such as Cyclic Redundancy Check (CRC) and Error Correction Codes (ECC), to detect and mitigate data corruption during transmission or processing. Flash storage, commonly used in embedded systems, introduces both opportunities and challenges for secure firmware development. Techniques like wear leveling, garbage collection, and encryption of stored data are explored to ensure data integrity and prevent memory degradation over time. Furthermore, secure boot processes, which verify firmware integrity during startup, are examined as a crucial layer in defense against malicious code injection. The research also highlights the use of secure over-the-air (OTA) updates to enhance firmware flexibility while maintaining security standards. By combining advanced error detection, secure data storage, and robust firmware design, this approach ensures that embedded systems can operate reliably under adverse conditions while resisting unauthorized access. This paper concludes by providing recommendations for best practices in developing resilient firmware, focusing on scalability, security, and performance to meet the evolving demands of IoT devices, automotive systems, and industrial applications.

2024

This paper gives an overview idea of efficient retrieval of images using different Mpeg-7 Features. Content Based Image Retrieval is a technique of automatic indexing and retrieving of images from a large data base. Feature Extraction and Similarity Matching are the two major steps for CBIR Systems. Color, Texture and Shape represent the three visual features for any image. Mpeg-7 Stands for Multimedia Content Description Interface. The main objective of Mpeg-7 is to provide a standardized set of technologies for describing multimedia content. It has allowed quick and efficient content identification, and addressing a large range of applications. The visual descriptors are classi?ed according to the feature such as color, shape, texture, etc. This paper has used Color Structure Descriptor for color and Edge Histogram Descriptor for texture. These two features are also integrated to increase the performance of CBIR Systems. The efficiency of all methods are demonstrated with the help...

2024, Progress In Electromagnetics Research B

2024

Droplet nucleation occurs when a small fluctuation in a system forms and subsequently grows in magnitude. Raindrop formation is a familiar everyday example. Droplets can be modelled using a field equation such as the Cahn-Hilliard system . Attempts to understand and describe growth processes in material physico-chemical systems are often made using nucleation theory, which works well in the dilute limit. The range of validity of nucleation theoretical models can be explored using microscopic simulation models in which nucleating clusters can be counted and measured exactly. The Becker-Doring nucleation theory is described and its range of validity is discussed for binary alloy simulations using the Kawasaki exchange model in various concentration regimes. Graph labeling and enumeration techniques are employed to study the range of sizes of clusters present in nucleating systems.

2024, Elsevier

The burgeoning air travel industry necessitates precise and timely flight delay prediction systems. These systems leverage various factors, including weather and air traffic, to forecast potential delays, mitigating their impact on airlines and passengers. Temporal dependencies and intricate feature
interactions were the limitations prevalent in previous models. By integrating XGBoost's robust feature selection capabilities with LSTM's sequential data processing, we significantly improve the accuracy of
flight delay predictions precisely mounting to 98.40 % by incorporating new features such as Airline Company and Year of Aircraft Manufacture. This approach offers a scalable and efficient solution, providing a more reliable air travel experience.
Keywords: Flight Delay Prediction, Long Short-Term Memory (LSTM), XGBoost, Ensemble
Learning, Machine Learning (ML), Air Travel, Forecasting.

2024

In this paper an apparatus (microwave dielectrometer) and method suitable to measure the dielectric constant (s') and loss factor (e") of well conducting ionic liquids and other solvents are demonstrated, namely a simple apparatus and method (completed and modified the known wave-guide system. The developed measuring system can be applied for automatic and online measurements. To reach the required accuracy a precise sample holder design was performed, and the measurements were carried out under similar conditions (microwave power, temperature, etc.) like they are generally used in the microwave practice. An automatic method was elaborated for calibration of the signals coming from the diode detectors Differently from the conventional measuring methods which have used only mW powers. Author's measurements were performed using about 20W/g. The author would like to introduce application methods in the different cases like measurements of ionic liquids, drying of impregnat...

2024

Meat is one of the most essential nutritious food item needed for human consumption from which high quality proteins, minerals and essential vitamins are derived. However, certain categories of consumers such as the children, elderly and sick people might not be able to provide the requisite biting force for tough meat tissues. Thus they would only be able to consume meat in their grinded form. In order to address this problem, it becomes necessary to have a meat grinding machine; in order to ensure good and easy digestion of the meat in their system. This paper presents the design of an efficient single meat grinding machine with both manual and motorized mode of operation, which can be used at any where (urban and rural area) and at any time (during electric power outage). This design provides the kinematic arrangement of forces, materials selection and proportion of parts to ensure maximum strength and functionality of the machine. To avoid failure of the machine, the working stress (21MN/m 2) of the machine is kept within the value of its ultimate stress (30MN/m 2).

2024, … Part 3 p 1111-1135 (SEE …

ISSUES THAT NEED TO BE CONSIDERED TO FOSTER DEVELOPMENT ORGANIZATION OF MATERIAL "Everyone designs who devises courses of action aimed at changing existing situations into preferred ones." Simon [I, p 1291.

2024

Ausztenites acél vékony lemezekből hengerített hengerpalástok hosszvarratainak és körvarratainak hegesztése impulzusívű plazmasugaras hegesztéssel történhet hegesztőanyag adagolásával vagy a nélkül. A technológiai jellemzőket értékeljük a... more

2024

A vékony (közelebbről: s ≤ 2 mm) acéllemezek hegesztése meglehetősen gyakori feladat. A feladat végrehajtására tipikusan alkalmazott eljárás a védőgázos, fogyóelektródás ívhegesztés (MIG/MAG), az AVI (TIG) hegesztés, illetve gyakran az ellenállás ponthegesztés. Rögtön hozzá kell azonban tenni, hogy az ilyen vékony lemezek anyaga az esetek döntő többségében ötvözetlen acél, austenites korrózióálló acél, ritkábban mikroötvözött vagy gyengén ötvözött acél. Ezekben az esetekben az acél karbontartalma olyan kis értékű, hogy ezt valamint a további ötvözők csekély mértékét és a kis falvastagságot is figyelembe véve nem csak a hidegrepedési veszély, de más hegeszthetőségi probléma sem vetődik fel.

2024

Az eutektoidos acélok egyik legelterjedtebb alkalmazási területe a faipari szalagfűrészlapok gyártása. A gyártmányokkal szembeni fontos elvárás nagy vágási élettartam. Ezt a tulajdonságot az éltartósságon kívül a kifáradással szembeni ellenállás biztosíthatja. Különösen kényes részei a szalagfűrészlapnak a fogtő és a hegesztési varrat, amelynek megfelelő minőségét csak a megfelelő minőségű nagy C-tartalmú alapanyag és annak hegesztésének helyes kivitelezése képes garantálni. A nagy C-tartalmú alapanyag és a hegesztett kötések vizsgálatának nyomán a szalagfűrészlapok törését, annak okait és a tönkremenetel elkerülésének lehetőségeit mutatja be ez a dolgozat.

2024

a megfelelo hegesztéstechnológia, védogáz és hozaganyag kiválasztása.

2024, Journal of Engineering Researcher and Lecturer

This research explores the implementation of experiential learning to improve students' understanding and skills in mechanical drawing using CAD software. We used this approach to identify challenges in learning mechanical engineering, including lack of time to learn CAD, suboptimal mechanical drawing skills, and limitations in producing details of mechanical components. Through a quasi-experiment with experimental and control classes, we measured the impact of the experiential learning method on improving conceptual understanding and practical skills in mechanical drawing. The results show that this approach is effective in improving students' understanding of detailed drawings and practical skills. The implementation of Experiential Learning also improved students' cognitive learning outcomes and psychomotor skills in mechanical drawing. The findings highlight the importance of adaptive and technological approaches to engineering education that are aligned with modern industry needs.

2024, Rapid Prototyping Journal

PurposeThe purpose of this paper is to characterize the material properties of carbon fiber polyamide composite (CFPC) used in a 3D rapid prototyping process based upon selective laser sintering (SLS) and demonstrate that the SLS process introduces a bias in the micro‐fiber orientation such that the CFPC solid is an orthotropic structural material.Design/methodology/approachMaterial coupons for tensile tests from each of the orthogonal planes are created using the SLS process. After tensile testing, the coupons are examined under scanning electron microscopy to verify the micro‐fiber orientation bias. A complex 3D structure developed utilizing the CFPC material is subjected to modal testing to extract the natural frequencies. These frequencies are compared to predictive numerical analysis results from computer‐aided engineering (CAE) software to validate the coupon test results.FindingsThis paper proves that the CFPC solid material is orthotropic after the SLS process and that the p...

2024, Global Journal of Research in Engineering & Computer Sciences

The study explores the impact of Cabot's robotic systems on modern industrial operations, highlighting their
precision and user-friendliness. Electronic technology has advanced with recent technological advancements, and
the ultimate goal of these technological advancements is to create robotic systems that are as human-like as
feasible. Thanks to the blessing of technical advancements, Cabot’s will be able to do duties significantly more
effectively than humans in difficult or urgent conditions where people are unable to do them. Several studies have
been evaluated in this study, and we have seen the effects and difficulties of employing Cabot's over humans as well
as the difficulties it encountered.

2024

An automobile that can function with little to no human input is referred to as an autonomous car (AC), driverless car (DC), robotic car, or self-driving car. Self-driving cars take care of every part of driving, including looking around, keeping an eye on important systems, and controlling the automobile, including going from one location to another. This study explores the key elements and deployment strategies for self-driving cars.

2024

Large systems require new methods of experimental designs suitable for the highly adaptive models which are employed to cope with complex non-linear responses and high dimensionality of input spaces. The area of computer experiments has started to provide such designs especially Latin hypercube and lattice designs. System decomposition, prevalent in several branches of engineering, can be employed to decrease complexity. A combination of system decomposition using a sparse matrix method, experimental design and modelling is applied to one example of an electrical circuit simulator producing a usable emulator of the circuit for use in optimization and sensitivity analysis.

2024, International Research Journal of Modernization in Engineering Technology and Science

This paper aims to provide a comprehensive overview of reverse engineering, discussing its various techniques, applications, challenges, and opportunities. By exploring these aspects, we can better appreciate the role of reverse engineering in advancing technology and solving complex problems. The primary objective of this paper is to elucidate the process and importance of reverse engineering across different domains. We aim to highlight the techniques used in reverse engineering, its applications in various industries, the challenges faced during the process, and the opportunities it presents for future advancements. Reverse engineering has a wide range of applications. In software development and maintenance, it aids in maintaining legacy systems and ensuring interoperability with modern technologies. It also drives product development and innovation by allowing companies to analyze competitors' products and enhance their own. Additionally, reverse engineering is used in legal and forensic contexts to resolve intellectual property disputes and conduct digital forensics. The process of reverse engineering faces several challenges, including technical, legal, and resource limitations. Technical challenges involve complex obfuscation techniques and evolving technologies that complicate the analysis. Legal and ethical challenges include navigating intellectual property laws and maintaining ethical integrity. Resource and expertise limitations involve the need for specialized tools, skilled personnel, and the significant time and cost involved in the process. Despite the challenges, reverse engineering presents numerous opportunities. Advancements in AI and machine learning have enhanced reverse engineering tools, making them more efficient and accurate.

2024, buet.ac.bd

Computational fluid dynamics (CFD) and Finite Element Analysis (FEA) were performed on a lawn mower mulching blade to optimize the blade design through increasing the lift force and decreasing aero-acoustic noise. The analysis of the current lawn mower blade included fluid dynamics around selected 2-D blade cross-sections at different positions down the length of the blade, blade structural stress and modal analysis. Then, a concept blade attempting to improve the current design was proposed and analyzed compared to the original design. The results showed a significant reduction in turbulent kinetic energy relating to aero-acoustic noise. A reduction in structural loading was also observed, due in part to a reduction in the pressure gradient near the outer cutting region. The loss of the lifting potential was compensated by using an added vertical section at the end of the blade and a chamfer on the edges at the inner radiuses.

2024

This paper describes the results of an R+D work in the field end milling of Rene108 and the GTD111 Ni-based superalloy. In the investigation of machinability by end milling technology, the authors used force, torque and additionally, temperature measuring equipments and methods. For the furtherance of the practical adaptation of the R+D results bythe measuring process and data evaluation, advanced IT-properties were applied.

2024, Integrated Computer-aided Engineering

Progressive lossy to lossless image compression of region-of-interest (ROI) in digital mammograms ensures receiving data of high quality at early stages of the transmission process which can be very useful for handling mammograms in Picture Archiving and Communication Systems (PACS) and teleradiology systems. In this paper, ROI images corresponding to clustered microcalcification in digitized mammogram are compressed using wavelet based progressive lossy to lossless image compression scheme. The coding scheme is optimized by a proper selection of the combination of reversible wavelet transform filters' and starting bitplane level. The proposed algorithm is implemented and tested using several mammograms from the Mammographic Image Analysis Society (MIAS) database. The experimental results show that ROI-based image compression offers a high visual quality of compressed images at a very low bit rate (0.05 bpp), and the combination of the 2/6 integer wavelet transform and the starting of ROI coding at moderate bitplanes represents an optimal selection. For example, high compression (0.05 bpp) using the 2/6 transform with ROI coding starting at moderate bitplane produced compression results with a lower mean-square-error (MSE) than those obtained from the same transform with ROI coding starting at lower and higher bitplanes. Also, the visual quality of its compression results was better than those of the other transforms.

2024, ACM Transactions on Design Automation of Electronic Systems

We present an application of the Java TM programming language to specify and implement reactive real-time systems. We have developed and tested a collection of classes and methods to describe concurrent modules and their asynchronous communication by means of signals. The control structures are closely patterned after those of the synchronous language Esterel , succinctly describing concurrency, sequencing and preemption. We show the user-friendliness and efficiency of the proposed technique by using an example from the automotive domain.

2024, 4th European LS-DYNA Users …

This paper presents the results of applying the finite element method to calculating the spring back of an automotive hood assembly, and its application to the functional build method. The assembly was comprised of six individual panels:... more

2024

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