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There are a number of issues for enterprises to implement green production. From operations perspective, selecting green improvement strategy is critical but difficult due to the fact that it affects not only green performance, but also production economy. Important trade-off exists between different objectives and decisions are subjected to dynamic and uncertain conditions. From system dynamics perspective,...
The analysis of production systems using discrete, event-based simulation is wide spread and generally accepted as a decision support technology. It aims either at the comparison of competitive system designs or the identification of a best possible parameter configuration of a simulation model. Here, combinatorial techniques of simulation and optimization methods support the user in finding optimal...
The recent improvements in efficiencies for kesterite (copper zinc tin selenide, CZTS) devices warrant an investigation into how the kesterite device stack can best be capped to minimize losses due to reflection. Additionally, ongoing efforts to replace the cadmium sulfide (CdS) layer in copper indium gallium selenide (CIGS)-based devices, most notably with zinc sulfide (ZnS), need to be accompanied...
To solving the real-time material delivery problems from the warehouse to workstations of the mixed model automotive assembly line in accordance with the production cycle. The material flow of automotive assembly, type of material and the production characteristic were analyzed in order to feed material timely & properly. The material real-time delivery system based on field bus has been developed...
In recent years, image reconstruction with sparse view angle sampling has been investigated by exploiting sparsity in the gradient magnitude image (GMI). Most commonly this approach involves iterative image reconstruction (IIR) aimed at solving optimization problems involving the image total variation (TV). Minimizing image TV, while constraining the estimated projection to be within some Euclidean...
Beam hardening is a well known effect in CT scanners that is cause by a combination of a broad polychromatic source X-ray spectrum and energy-dependent material attenuation. When the object consists solely of a single material, the nonlinear beam hardening effect can be corrected using sinogram pre-correction techniques. However, when multiple materials are present, it is impossible to fully compensate...
With the fast growth of the microelectronic technology, the smaller and smaller feature size of IC (Integrated Circuit) and the increasing circuit complexity, the optimization of layout based on the distribution of defect is becoming more and more important. Firstly, associating critical area with edge network, a concept of shortest path of redundancy material defect is presented and realized. Secondly,...
In this paper, the rotor shape of synchronous reluctance motor (SynRM) is designed using the sensitivity analysis along with the level set method. To reduce numerical errors of sensitivity value on the interface, the adaptive level set method is adopted. The rotor shape of the SynRM is designed to maximize average torque or to minimize cogging torque by distributing the ferromagnetic material over...
This paper addresses the power transformer tank design optimization problem and, proposes a tank mechanical property analysis method with high calculation precision. The main contributions of this research are: 1) introduction of a new effective method to calculate transformer tank mechanical property; 2) incorporation of Quantum behaved Particle Swarm Optimization (QPSO) algorithm to solve the tank...
In the present research we optimize the design of light emitting diode module produced using «chip-on-board» (COB) technology to reduce light energy losses in elements of the module. Optimization was performed using numerical simulations and experimental study of COB samples. Calculations predict that the enhancements of light extraction from COB with the optimized shape of encapsulating cover compared...
Internet of Things has unparalleled advantages as a new technology, to achieve the objects of the intelligent identification and management, improve resource utilization and efficiency. Internet of Things can use RFID technology to achieve the exchange and sharing of information is an important means to break through the bottleneck of the times the items transparent tube through the open computer...
This paper describes the two-stage compilation system based on LLVM compiler infrastructure and the performance optimizations made possible by this deployment technique.
We treat the problem of inversion of an element in GF(2n). Our approach is based on representation of this inversion in the form of an appropriate determinant (Hankel polynomial) and further its computation with the aid of suggested recursive procedure.
Complex engineering systems, such as nuclear processing systems, need to be closely monitored to meet given operational requirements. Previous work has developed diagnosers for detecting and counting occurrences of anomaly patterns (e.g., physical faults, facility misuse) in such systems within discrete event dynamic system (DEDS) framework. This work illustrates the application of this general methodology...
This article demonstrates the ability of on-line optimization of cone crushers, specifically maximization of the total throughput of the crusher by adjusting the eccentric speed (ω). The on-line optimization was based on the Extremum-Seeking Control (ESC) approach, which is advantageous when optimizing systems with unknown time varying characteristics. Two types of gradient based approaches are tested...
A nanogenerator is developed using zinc oxide (ZnO) nanowires. Design of experiments is used to optimise the growth parameters of the ZnO nanowires, with an increase in output voltage set as the optimising parameter. After the optimisation of the nanowire growth, focus is shifted to the optimisation of the manufacturing of the nanogenerator. The nanowires are plasma treated and annealed right after...
Compliant mechanisms have made an enormous contribution in the design process of various fields such as for adaptive structures, hand-held tools, components in transportations, electronics, and surgical tools. The use of compliant mechanisms will help in reducing the number of components, which therefore decrease manufacturing cost and additionally increase the performance. Topology optimization has...
In recent years, biological micromanipulations emerge as a promising application in the micro/nano technology. Manual manipulation tends to have disadvantages of low success rate and low repeatability. In order to perform the robotic biomanipulations, a novel flexure-based Yθ large-workspace micromanipulator with differential lever displacement amplifier (DLDA) is proposed in this paper. After a series...
Illumination is one of the most important elements to capture high quality images in machine vision systems, which can guarantee the efficiency and robustness of the applications. Contrary to the experience based trail and error convention to select a light system, a optimization model for LED illumination system design is proposed based on the surface reflection characteristics, e.g. the roughness,...
In the field of the micro/nano operations, like micro, assembly engineering, biological engineering, ultraprecision machining and military needed precision operation and control , we need to use with micron, sub-micron or even nanometer resolution of micromanipulator. Micro positioning platform is an important carrier of precision positioning technology. The purpose of this paper is to design a flexible...
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