In this paper, modal control was used to control the active suspension of a quarter-car model. Modal control can be designed to alter the dynamics of any mode of a system without disturbing the remaining modes. theref...
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ISBN:
(纸本)9781728137872
In this paper, modal control was used to control the active suspension of a quarter-car model. Modal control can be designed to alter the dynamics of any mode of a system without disturbing the remaining modes. therefore, in this study, modal control was used to alter the complex eigenvalue of the body-bounce mode of a quarter-car suspension model and thereby by optimizing a measure of the frequency response functions from road disturbance to sprung and unsprung mass displacements, the ride-comfort of a vehicle was improved. It has been shown that modal control can be used in a direct manner to change the dynamics of a vehicle suspension i.e. soft suspension, stiff suspension depending on the driver attitude that affects the vehicle stability and road conditions i.e. urban driving, off-road driving.
programming skill is one of the most important and demanding skill in the current generation. In order to enable learners and programmers to practice programming and gain problem-solving skills, many Online Judge (OJ)...
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ISBN:
(纸本)9781450366397
programming skill is one of the most important and demanding skill in the current generation. In order to enable learners and programmers to practice programming and gain problem-solving skills, many Online Judge (OJ) systems exist. Most of these OJ systems have to be operated solely by students and learners. these students and novice programmers sometimes compete against each other or solve the programming problems by themselves in offline mode. But, most OJ systems have their problems arranged simply into volumes and various contests events. this arrangement system does not have any clear indication of the difficulties and categories of problems. thus, in this paper, we have studied reliable techniques on the extraction of keywords and features which can categorize these OJ system's programming problems into their respective types and skills. We have leveraged two popular topic modeling algorithms, Latent Dirichlet Allocation (LDA) and Non-negative Matrix Factorization (NMF) to extract relevant features. Afterward, six classifiers were trained on these topic modeling features and Naive TF-IDF features. From our studies, we discovered that topic modeling features were relatively smaller in dimensionality, yet matched the performance when trained on high dimensional naive TF-IDF features. Our main goal was to understand the precise trade-off between accuracy and dimensionality of the textual data of programming problem statements. this experiment has enabled us to obtain important tags, hint, and classification of Online Judge programming problems.
the research deals withthe specific characteristics of swimmers' training management taking into account typologies of bioenergetics. For an effective and quick functional state and reserve capacities of athletes...
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ISBN:
(纸本)9789897583834
the research deals withthe specific characteristics of swimmers' training management taking into account typologies of bioenergetics. For an effective and quick functional state and reserve capacities of athletes' organism diagnostics we held the test according to "D&K - TEST" express-diagnostics methodology created by Karlenko V.D. We created a block system of swimmers' sports training control. the block system includes the stages and the main components of management structure, where great attention is paid to information gathering concerning swimmers' functional training taking into account their typology of bioenergetics. We studied the ratio of swimmers' bioenergetics typology at the training stage according to the years of study. We estimated the level of functional state and swimmers' organism reserve capacities depending on their bioenergetics type. Specially selected training means and methods for swimmers were used in accordance withtheir typology of bioenergetics and it provided their physical readiness improvement, characterizing the effectiveness of competitive activity. We received the results of swimmers' functional state and reserve capacities of their organism, combined according to three types: aerobic, mixed and anaerobic.
As Asphalt Concrete (AC) mixture is predominantly composed of aggregates, morphological properties of aggregate (like texture, shape, size, angularity) affect mechanical properties of AC significantly. this work captu...
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In this paper, we investigate the problem of efficient user association and subchannel assignment in multi-cell multi-carrier nonorthogonal multiple access networks. An optimization problem is formulated to maximize t...
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In this paper, we investigate the problem of efficient user association and subchannel assignment in multi-cell multi-carrier nonorthogonal multiple access networks. An optimization problem is formulated to maximize the energy efficiency. the proposed solution includes two stages. First, we propose an iterative low complexity algorithm to handle the optimization problem. Second, we use the output from the iterative solution to train two deep neural network (DNN) models. To obtain the final output, the output of the DNNs are mapped in matrix which represents the final user association and subchannel assignment. the simulation results have shown the efficiency of the proposed framework compared to two step 2D matching algorithm and fractional programming (FP) method.
Nonlinear optimization techniques often suffer from time-consuming computational load, which impedes them to be implemented as controller of fast plans, or when a fast action like trajectory tracking is required. In t...
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ISBN:
(纸本)9781728137872
Nonlinear optimization techniques often suffer from time-consuming computational load, which impedes them to be implemented as controller of fast plans, or when a fast action like trajectory tracking is required. In this paper, a Nonlinear Model Predictive Control (NMPC) approach is used to perform the trajectory tracking problem in a robot manipulator in the presence of input saturation and un-modeled dynamics, using the Quasi-Linear Parameter Varying (Quasi-LPV) representation. In this method, instead of the nonlinear state difference equations of the system, a sequence of linearized state equations about a nominal state-control history, over the prediction horizon, is used. By so doing, standard Quadratic programming (QP) optimization algorithms could be used for the online optimization problem, therefore, speed and efficiency of convergence to the optimal solution would be enhanced. Efficacy of this method is shown by simulation study of a 2-DOF robot manipulator.
Autonomous driving functions increasingly incorporate machine learning methods for perception, environment modeling and decision making. the ever-present danger of unintended behavior of neural networks has given caus...
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ISBN:
(纸本)9781728156255
Autonomous driving functions increasingly incorporate machine learning methods for perception, environment modeling and decision making. the ever-present danger of unintended behavior of neural networks has given cause for concern in safety-critical applications and has spurred research towards the establishment of certified properties. In our work we present a general approach for exploring guaranteed properties of neural networks through a specific use case. We first methodically specified several desired properties for an ideal traffic sign classifier. then we applied a mixed integer linear programming verification method to certify (or conversely, falsify) that our pre-trained rectified linear unit (ReLU) activation network will satisfy given properties under all conditions. We established through relaxations of our initial specification that our model does in fact happen to guarantee certain (but not all) properties at a different threshold. We thus showed that it is possible to establish the degree to which non-trivial and humanly meaningful properties are inherently guaranteed by an arbitrary pixel space ReLU network. We believe this approach can be a helpful addition in comprehensively evaluating the reliability of a network via quantifying its degree of compliance to an ideal specification.
the proceedings contain 10 papers. the special focus in this conference is on international Symposium on Unifying theories of programming. the topics include: A Testing Perspective on Algebraic, Denotational, and Oper...
ISBN:
(纸本)9783030310370
the proceedings contain 10 papers. the special focus in this conference is on international Symposium on Unifying theories of programming. the topics include: A Testing Perspective on Algebraic, Denotational, and Operational Semantics;whither Specifications as Programs;connecting Fixpoints of Computations with Strict Progress;probabilistic Semantics for RoboChart: A Weakest Completion Approach;Unified Graphical Co-modelling of Cyber-Physical Systems Using AADL and Simulink/Stateflow;Hybrid Relations in Isabelle/UTP;the Inner and Outer Algebras of Unified Concurrency;developing an Algebra for Rely/Guarantee Concurrency: Design Decisions and Challenges.
the proceedings contain 164 papers. the topic discussed include: initial learning scenarios based on the computational thinking evaluation for the course programming fundamentals at INACAP;interpretation of computatio...
ISBN:
(纸本)9781450371919
the proceedings contain 164 papers. the topic discussed include: initial learning scenarios based on the computational thinking evaluation for the course programming fundamentals at INACAP;interpretation of computational thinking evaluation results for enrollment prediction;learning computational thinking and social skills development in young children through problem solving with educational robotics;ringing computational thinking to hospital classrooms;predicting student failure in an introductory programming course with multiple back-propagation;engineering education addressing professional challenges;engaging students in the context of software project management teaching;a chatbot assistant for writing good quality technical reports;understanding uncertainties in thermographic imaging;3D printed models-based lab activities to enhance learning-teaching processes in structural engineering courses;the teaching of metrology the genesis and the epilogue of a degree;and learning object for contextualization of matrix operations in digital image processing through programming.
Microtrips are the key in driving cycle, and the base for constructing a driving cycle. For the construction of a modal driving cycle, the study firstly used principal component analysis to reduce the dimensions of th...
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Microtrips are the key in driving cycle, and the base for constructing a driving cycle. For the construction of a modal driving cycle, the study firstly used principal component analysis to reduce the dimensions of the index data of microtrips, then a multi-objective optimization model was established withthe goal of minimizing the deviation between the feature of the vehicle modal driving cycle and the actual vehicle operating feature. the non-dominated sorting genetic algorithm-II (NSGA-II) was designed to save the optimization model. Based on the correlation test of actual data, the designed method can obtain highly representative solutions.
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