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12th SAE BRASIL Colloquium on Suspensions and Road Implements and engineering Exhibition, BRASILCOLL 2023

作者： Eckert, Paulo Roberto Boff, Ben Hur Bandeira Follmann, Lucas Da Silva Oliveira, Eduardo Filho, Aly Ferreira Flores Flores, Jeferson Vieira Perondi, Eduardo Andre Lenz, Augusto Schmidt Poli, Mariana Damm Marcolin, Vinicius Campagnaro Struck, Rodrigo Graduate Program in Electrical Engineering Federal Universi Russia Graduate Program in Mechanical Engineering Federal Universi Russia Suspensys Automotive Systems RS Caxias do Sul Brazil

This study comprehensively describes the application of linear electromagnetic actuators in automotive suspension systems, focusing on the electromagnetic force necessary in suspension systems operating in passive, semi-active, and active modes and their capability for energy regeneration. The use of electromagnetic actuators as an alternative to traditional shock absorbers makes easy the energy harvesting that is typically lost during vertical vehicle displacement. An initial sizing technique for dimensioning electromagnetic actuators is applied to estimate the requirements for heavy vehicles. Experimental tests are conducted to validate the proposed method and assess the performance of the electromagnetic actuator in the suspension system for passive, semi-active, and active operations. A suitable extrapolation of the validated data is performed to determine the feasibility of the application of the proposed solution for heavy vehicles and identify potential applications and markets based on the road conditions of the ISO 8608 standard. This study offers a comprehensive approach to determining the actuator force for the suspension system and/or studying its potential for energy regeneration. As a result, it becomes possible to analyze the viability of the actuator replacement and provides important insights for further research and development. © 2023 SAE International. All rights reserved.

关键词： Shock absorbers

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Bayesian credit scoring model with integration of expert knowledge and customer data

Bayesian credit scoring model with integration of expert kno...

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24th Mini EURO Conference on Continuous Optimization and Information-Based Technologies in the Financial Sector, MEC EurOPT 2010

作者： Biçer, Işik Seviş, Deniz Bilgiç, Taner Department of Industrial Engineering Bogaziçi University Turkey Graduate Program of Systems and Control Engineering Bogaziçi University Turkey

ISBN: (纸本)9789955285977

Bayesian classification method is one of the effective classification methods in credit scoring applications. Application of this method to credit scoring provides several advantages, which are suggested in the literature. In this research, a Bayesian credit scoring model is applied for classification of personal loan customers. The contribution of this paper is two-fold. First, we apply a Bayesian classification model to credit scoring of personal loan customers with integration of knowledge of credit experts and personal loan data. The dependency relations between the variables are constructed based on the knowledge of credit experts, and the parameters are estimated by Expectation-Maximization (EM) algorithm with real personal loan data of customers obtained from a Turkish bank. Second, we assess the effectiveness of the Bayesian credit scoring model based on additional personal loan data of the bank customers. The results show that the Bayesian credit scoring model is more effective than the logistic regression credit scoring model which has been currently used in the bank. © Izmir University of Economics, Turkey, 2010.

关键词： Sales

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Design and Performance Evaluation of Sequence Partition Algorithms

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Journal of Computer Science & Technology 2008年第5期23卷 711-718页

作者：杨兵陈菁吕恩月郑斯清 Cisco Systems 2200 East President George Bush Highway Telecom. Engineering Program University of Texas at Dallas Department of Mathematics and Computer Science Salisbury University Department of Computer Science University of Texas at Dallas

Tradeoffs between time complexities and solution optimalities are important when selecting algorithms for an NP-hard problem in different applications. Also, the distinction between theoretical upper bound and actual solution optimality for realistic instances of an NP-hard problem is a factor in selecting algorithms in practice. We consider the problem of partitioning a sequence of n distinct numbers into minimum number of monotone （increasing or decreasing） subsequences. This problem is NP-hard and the number of monotone subsequences can reach [√2n＋1/1-1/2]in the worst case. We introduce a new algorithm, the modified version of the Yehuda-Fogel algorithm, that computes a solution of no more than [√2n＋1/1-1/2]monotone subsequences in O（n^1.5） time. Then we perform a comparative experimental study on three algorithms, a known approximation algorithm of approximation ratio 1.71 and time complexity O（n^3）, a known greedy algorithm of time complexity O（n^1.5 log n）, and our new modified Yehuda-Fogel algorithm. Our results show that the solutions computed by the greedy algorithm and the modified Yehuda-Fogel algorithm are close to that computed by the approximation algorithm even though the theoretical worst-case error bounds of these two algorithms are not proved to be within a constant time of the optimal solution. Our study indicates that for practical use the greedy algorithm and the modified Yehuda-Fogel algorithm can be good choices if the running time is a major concern.

关键词： monotone subsequence permutation algorithm NP-complete approximation complexity

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Real time estimation of evoked potentials by adaptive time - Dependent filter 17

Real time estimation of evoked potentials by adaptive time -...

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17th Convention of Electrical and Electronics Engineers in Israel, EEIS 1991

作者： Fine, Menachem Furst, Miriam Bio-Medical Program Dept of Electrical Engineering Systems Faculty of Engineering Tel-Aviv University Tel-Aviv69978 Israel

ISBN: (纸本)0879426780

Estimating evoked potentials is a process of detecting a signal out of measurements ensemble. The evoked potentials are usually described as a deterministic process which is corrupted by unrelated noise. The signal is usually detected by averaging these measurements. We propose an improved consistent estimation of the signal, which is based on the average response. The proposed filter is depend on the estimation of the signal and the noise autocorrelations. The filter coefficients are obtained by minimizing the mean squared error (MSE) of the optimal filter of a non stationary process applied on a single sweep. The average and autocorrelation matrixes can be build in real time, without saving the measured data. A short off line processing of the calculated data is needed afterwards. © Proceedings - 17th Convention of Electrical and Electronics Engineers in Israel, EEIS 1991. All rights reserved.

关键词： Mean square error

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Strategies for filtering e-mail messages combining content-based and sociological filtering with user-stereotypes 4th

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4th International Workshop on Next Generation Information Technologies and systems, NGITS 1999

作者： Shoval, Peretz Shapira, Bracha Hanani, Uri Information Systems Engineering Program Department of Industrial Engineering & Management Ben-Gurion University of the Negev Beer-Sheva84105 Israel

ISBN: (纸本)3540662251

A prototype system was developed to test the applicability of a dualmethod information-filtering model for filtering e-mail messages: content-based filtering and sociological filtering implemented with user stereotypes. This paper reports the main results of experiments that were run to determine the effects of combining the two methods in various ways. A major outcome of the experiments is that the combination of both methods yields better results than using each method individually. The optimal combination of the two filtering methods is stereotype dependent. © Springer-Verlag Berlin Heidelberg 1999.

关键词： Information filtering

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Using Entropy for Modeling Difficulty in the Asteroid Escape Sliding Puzzle

Using Entropy for Modeling Difficulty in the Asteroid Escape...

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2023 IEEE CHILEAN Conference on Electrical, Electronics engineering, Information and Communication Technologies, ChileCon 2023

作者： Del Solar-Zavala, Jose A. Schaa, Hans Barriga, Nicolas A. Doctoral Program in Engineering Systems Universidad de Talca Curicó Chile Universidad de Talca Faculty of Engineering Talca Chile

ISBN: (纸本)9798350369533

Developing a standarized metric for difficulty that can be applied to a large number of puzzles is not trivial. This does not come as a surprise because of the subjective factors involved in defining difficulty. However, studies that address the design and application of metrics that can be applied to multiple games are still important, because they can still be used to increase the quality of content generated by automated agents. We take a look at applying information entropy concepts in the game Asteroid Escape and compare the results with other metrics to assess difficulty used in games of similar characteristics. This approach is largely based on future work proposal from a previous study done on The Witness puzzles that yielded positive results on using an automatic method to assess the difficulty of user rated puzzles. This study also includes a modification of BFS and A∗ capable of finding every shortest solution. From the implementation, it is possible to look at contradicting results with the literature, where basic metrics had a better result correlating with an official definition of difficulty from the game designers. The impact expected from this study is to propose an update to the the corpus of puzzle games where the uncertainty metric for difficulty has been applied. As having an accurate assessment of difficulty can open the doors to other studies, such as improving the quality of the output from procedural content generation methods in games or propose an automated method of difficulty adjustment based on this metric. © 2023 IEEE.

关键词： Asteroids

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InP/ZnS core/shell quantum dots: Synthesis, characterization and their application in fullerene derivative based flexible solar cells

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Results in Physics 2025年 69卷

作者： Zhichu, Chen Tahir, Muhammad Muhammad, Fida Aziz, Fakhra Ayub, Ambreen Badshah, Fazal Refat, Moamen S. Cakmak, Sadiye M. Rehan, Shanza Adam, Abdel Majid A. Alsuhaibani, Amnah Mohammed Ayob, Afida Sarker, Mahidur R Khan, Adam School of Electrical and Information Engineering Hubei University of Automotive Technology Shiyan 442002 China Semiconductor Physics & Devices Laboratory Department of Physics Faculty of Physical and Numerical Sciences Abdul Wali Khan University Mardan 23200 Pakistan Department of Electronics University of Peshawar KP Pakistan Department of Physics Women University Mardan KP 23200 Pakistan Department of Chemistry College of Science Taif University P.O. Box 11099 Taif 21944 Saudi Arabia Program of Medical Monitoring Techniques Osmangazi University Eskisehir Eskisehir 26040 Turkey Faculty of Materials and Chemical Engineering GIK Institute of Engineering Sciences and Technology Topi 23640 Pakistan Department of Physical Sport Sciences College of Sport Sciences & Physical Activity Princess Nourah bint Abdulrahman University P.O. Box 84428 Riyadh 11671 Saudi Arabia Centre for Integrated Systems Engineering and Advanced Technologies (INTEGRA) Department of Electrical Electronic and Systems Engineering Universiti Kebangsaan Malaysia Bangi 43600 Malaysia Institute of Visual Informatics Universiti Kebangsaan Selangor Malaysia Bangi 43600 Malaysia Universidad de Diseno Innovacion y Tecnología UDIT Av. Alfonso XIII 97 Madrid 28016 Spain Department of Electronics Engineering University of Engineering & Technology Peshawar (Abbottabad Campus) Abbottabad Pakistan

Herein, we report on the synthesis and characterization of p-type semiconductor indium phosphide/zinc sulphide (InP/ZnS) core/shell quantum dots (QDs) prepared via a simple solvothermal method and their potential application in bulk heterojunction (BHJ) flexible solar cell (SC). The BHJ SC composed of donor–acceptor (D-A) configuration at nanoscale provides larger interfacial junction area throughout the bulk volume of the photo-absorber D-A blend that facilitates excitons to efficiently dissociate within the bulk layer at D-A interface. Hence, InP/ZnS core–shell QDs and a fullerene derivative – phenyl C61 butyric acid methyl ester (PCBM) – are used as hybrid inorganic–organic D-A materials, respectively, to fabricate Ag/LiF/InP/ZnS-PCBM/P3HT/ITO/PET BHJ flexible SC. Indium tin oxide (ITO) coated on polyethylene terephthalate (PET), poly(3-hexylthiophene) (P3HT), lithium fluoride (LiF) and silver (Ag) are employed as a flexible substrate, hole transport layer (HTL), electron transport layer (ETL) and counter electrode, respectively. Photovoltaic (PV) properties of the fabricated BHJ flexible SC are studied under standard testing conditions (STC) i.e., 25 ⁰C, 1.5 AM global and 100 mW/cm² irradiation, which exhibit fill factor (FF) of 59 ± 0.02 % and power conversion efficiency (PCE) of 4.22 ± 0.05 %. Also, the heterojunction characteristics are investigated in dark condition (0 lx) to find series resistance (R_s), ideality factor (n), and reverse saturation current (I₀). X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM) and ultraviolet–visible (UV–vis) spectroscopy are performed to further investigate the properties of InP/ZnS-PCBM thin films. Transmission electron microscopy (TEM) image of InP/ZnS core/shell QDs confirmed the successful synthesis of QDs having an average size of 5 ± 1 nm. The InP/ZnS-PCBM D-A photo-absorber layer reveals its potential as one of good candidates for hi

关键词： Flexible solar cell Hybrid bulk heterojunction (BHJ) InP/ZnS core/shell QDs Power conversion efficiency (PCE) Quantum dots (QDs) synthesis

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An examination of ME449 redesign and prototype fabrication: A new senior/grad design and fabrication course at the university of Wisconsin-madison 122

An examination of ME449 redesign and prototype fabrication: ...

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2015 122nd ASEE Annual Conference and Exposition

作者： Manner, Kim J. Pfefferkorm, Frank E. University of Wisconsin Department of Mechanical Engineering Madison United States University of Wisconsin Manufacturing Systems Engineering Program United States

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A freshman engineering course which introduces engineering design and engineering fundamentals in the context of a unifying theme

A freshman engineering course which introduces engineering d...

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2001 ASEE Annual Conference and Exposition: Peppers, Papers, Pueblos and Professors

作者： Wilk, Richard D. Traver, Cherrice LaPlante, Christine Hedrick, James Keat, William D. Wicks, Frank E. Division of Engineering Union College Schenectady NY Computer Systems Engineering Program Department of Civil Engineering Union College Department of Mechanical Engineering Union College

A revision of Union College's Introduction to engineering and Computer Science course is presented. The change include the introduction of a design project and competition, the presentation of engineering and computer science concepts under a unifying theme, and the introduction of weekly talks from outside speakers. The course instruction also changed from a series of modules taught by different faculty to a structure in which all the faculty taught all the topics in the course. If this approach is used with a group of cooperative faculty, the benefits of the exposure to different teaching styles and understanding of other disciplines can be positive.

关键词： engineering education

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Evaluation of the performance of demand control ventilation system for school buildings located in the hot climate of Saudi Arabia

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Building Simulation 2022年第6期15卷 1067-1082页

作者： Alaa Alaidroos Ayad Almaimani Moncef Krarti Ammar Dahlan Rahif Maddah Architectural Engineering Department King Abdulaziz UniversityRabighSaudi Arabia Faculty of Architecture and Planning King Abdulaziz UniversityJeddahSaudi Arabia Building Systems Program University of Colorado BoulderBoulderCOUSA

The advantages of the demand control ventilation system(DCV)have been widely discussed in previous research ***,the literature has not addressed the benefits of DCV on controlling indoor CO_(2)concentration and minimizing cooling energy consumption for school buildings located in extremely hot ***,this paper contributes to the development of DCV and mechanical ventilation systems through a comprehensive evaluation of these systems to maintain acceptable indoor air quality(IAQ)while minimizing cooling energy demands for school buildings located in the harsh hot climate of Saudi *** evaluation is based on a calibrated whole-building energy model and validated IAQ predictions using field data obtained from a school case study in *** results of this research study confirm that hourly and sub-hourly monitoring of indoor CO_(2)concentration is required to ensure optimal design and operation of the ventilation systems in *** addition,the analyses indicate that a 13%increase in cooling energy end-use can result for any additional 0.1 students/m^(2)density increase in the ***,the energy penalties related to ventilation needs can be reduced by up to 25%using DCV instead of conventional mechanical ventilation systems for school buildings located in Saudi Arabia’s hot climate.

关键词： mechanical ventilation demand control ventilation(DCV) indoor air quality(IAQ) CO_(2)concentration energy efficiency school buildings

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