The benefits of modularization, such as reusability and upgradeability, remain underutilized in space. Exploiting these advantages after a spacecraft is launched introduces too much cost and risk in the current paradi...
详细信息
Evolutionary algorithms are heuristic methods that have yielded promising results for solving nonlinear, nondifferentiable, and multi-modal optimization problems in the power systems area. The differential evolution (...
详细信息
Evolutionary algorithms are heuristic methods that have yielded promising results for solving nonlinear, nondifferentiable, and multi-modal optimization problems in the power systems area. The differential evolution (DE) algorithm is an evolutionary algorithm that uses a rather greedy and less stochastic approach to problem solving than do classical evolutionary algorithms, such as genetic algorithms, evolutionary programming, and evolution strategies. DE also incorporates an efficient way of self-adapting mutation using small populations. The potentialities of DE are its simple structure, easy use, convergence property, quality of solution, and robustness. This paper proposes a new approach for solving economic load dispatch problems with valve-point effect. The proposed method combines the DE algorithm with the generator of chaos sequences and sequential quadratic programming (SQP) technique to optimize the performance of economic dispatch problems. The DE with chaos sequences is the global optimizer, and the SQP is used to fine-tune the DE run in a sequential manner. The combined methodology and its variants are validated for two test systems consisting of 13 and 40 thermal units whose incremental fuel cost function takes into account the valve-point loading effects. The proposed combined method outperforms other state-of-the-art algorithms in solving load dispatch problems with the valve-point effect. [ABSTRACT FROM AUTHOR]
In this paper, we present a distributed algorithm utilizing the proximal alternating direction method of multipliers (ADMM) in conjunction with sequential constraint tightening to address mixed-integer quadratic progr...
详细信息
The impingement of fuel sprays on the piston surface significantly affects mixture formation, combustion performance, and pollutant emissions in Direct-Injection Spark-Ignition (DISI) engines. To better understand the...
详细信息
A new analysis approach is developed for hand-arm vibration analysis of musculoskeletal disorders. At a given equilibrium point, the musculo-tendon system can be interpreted as a spring damper system. It is considered...
详细信息
A new analysis approach is developed for hand-arm vibration analysis of musculoskeletal disorders. At a given equilibrium point, the musculo-tendon system can be interpreted as a spring damper system. It is considered that the Flexor Digitorum Profundus (FDP) and Lumbrical (LU) are participating in the response to the vibration force. The study shows that realistic muscle models should be included in the vibration analysis of the hand-arm exposed to tool vibration. The hand-arm system is found to have a redundancy in muscles because it has many more muscles than the minimum number required to establish equilibrium in gripping. An important observation is that bigger extrinsic muscles carry most of the static load to generate the grip force, and smaller muscles carry most tool vibration force at high frequencies.
The vibration response of small arteries is studied by modeling the system as an elastic tube filled with incompressible fluid embedded in an elastic foundation. The entire artery system is represented by a series of ...
详细信息
The vibration response of small arteries is studied by modeling the system as an elastic tube filled with incompressible fluid embedded in an elastic foundation. The entire artery system is represented by a series of circuits and the segments of the artery system is considered to be small oscillatory dynamic systems connected serially by the fluid impedance. The resonance frequency of the digital artery is calculated with 0.1mm thickness, 0.49 Poisson's ratio, 15 MPa Young's modulus and 50mm length of the vessel. When the cochlea are subjected to sound of a given frequency. the basilar membrane vibrates with large amplitude at a particular position, and the position depends on the frequency of the sound. A very interesting observation is that when the input is from the large diameter side, the same artery system does not show any spatial resonance.
Quantum sensing with nitrogen-vacancy centers in diamond has emerged as a powerful tool for measuring diverse physical parameters, yet the versatility of these measurement approaches is often limited by the achievable...
详细信息
ThermoNet is a comprehensive web site being developed under NSF sponsorship to provide internet-based learning resources for students in engineering thermodynamics. The site includes a series of tutorials covering the...
详细信息
ThermoNet is a comprehensive web site being developed under NSF sponsorship to provide internet-based learning resources for students in engineering thermodynamics. The site includes a series of tutorials covering the topics typical of introductory engineering thermo courses, interactive example problems, thermodynamic property tables with an on-line calculator, historical and biographical notes on the evolution of thermodynamics, a rich archive of graphics, animations and movies illustrating thermodynamic principles and applications, and links to other sites of thermodynamic interest. Conceptual and detailed design of ThermoNet, implementation of a server-based data acquisition system to collect data on student use patterns, and evaluation of student learning styles and reactions to ThermoNet are discusssed.
We perform experiments to investigate how humans acquire an internal representation of virtual objects through the execution of reaching movements across the object surface. Subjects were instructed to make reaching m...
详细信息
暂无评论