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In order to solve the problem of railway emergency materials dispatching optimization considering the difference of the emergency time limit of the materials, the uniqueness of this problem is analyzed and a multi-objective dispatching model is established with multi-objective programming method. On base of satisfying the requirement of emergency time limit of different materials, the model achieves...
Automated WIP Flow Management (WFM) is an essential factor for semiconductor fabs to maintain a competitive position in a cost-, time-, and quality-sensitive market. WFM comprises capabilities like dispatching, scheduling, material flow prediction, capacity planning and optimization. In this paper, we present a framework for setting up effective WFM mechanisms in a frontend fab. The framework assures...
Whenever a research scholar starts working on some innovative ideas he/she searches for the domain specific technical research articles published as research papers in most of the international journals, conferences or workshops. The problems associated with these papers are similarity in contents and repeated relevant information. Reading these all relatedpapers completely one by one to get the latest...
The performance of GaN/InGaN quantum well was simulated using ATLAS software (Silvaco International Inc.) In this work, we simulated a quantum well active region of InGaN with GaN barrier layers. Here, we studied the changes in luminous intensity by varying thickness of the well region and Indium mole fraction of InGaN quantum well. It is found that the luminous intensity decreased when the thickness...
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...
This paper describes a new designed materials distribution network of public libraries under National Library Board of Singapore. In the new design, the whole distribution network is segregated into a number of sub-networks, or regions, with Library Supply Center (LSC) as a central depot. The route planning for each region could be modeled as a vehicle routing problem (VRP) with both pickup and delivery,...
The rational of incorporating material reuse considerations into modular design has been well recognized. The key technical challenge, however, lies in that such material reuse modularity must be consistent with and conform to the legacy structure of a technical system. This paper is geared towards a total system approach and introduces a game theoretic approach to joint optimization of technical...
The input material of the tubes production process consists of steel bars that have to be cut into pieces before they are heated and rolled. In order to avoid waste of input material the cuts of the input material have to be optimised which is a classic one-dimensional cutting problem. A special characteristic of the tubes production is that the same output can be reached with different cutting lengths...
In order to solve scheduling scheme of multiple supply points to provide a variety of emergency supplies for multiple hit points under large-scale disasters efficiently, after summarizing the existing research, mathematical model is constructed with the objective to minimize emergency response start time and the number of supply points, and a genetic algorithm to obtain optimal solution is designed...
Radio frequency identification (RFID) technology has gained increasing popularity in businesses to improve operational efficiency and maximise costs saving. However, there is a gap in the literature exploring the enhanced use of RFID to substantially add values to the supply chain operations, especially beyond what the RFID vendors could offer. This paper presents a multi-agent system, incorporating...
We address the numerical analysis of piezo MEMS square extensional resonators and show that interfacial losses are dominant. These are formulated in terms of the stress jump across the interface yielding a viscous type of dissipation. The model developed is then employed to perform an optimization of the pattern of the piezo-layer so as to excite selected mechanical modes
Accurate simulation of SAW devices requires accurate material tensor data. However, literature values are in most cases measured on certain engineered test devices and do often not reflect real world production processes with the necessary accuracy. In this work, a parameter identification method is outlined, which can be used to estimate material parameters from admittance measurements of resonators...
To enhance learning, it is desirable to also let students learn from each other, e.g., by working in groups. It is known that such groupwork can improve learning, but the effect strongly depends on how we divide students into groups. In this paper, based on a first approximation model of student interaction, we describe how to optimally divide students into groups so as to optimize the resulting learning...
This paper presents the analysis and optimization of the impedance profile of a high speed data (HSD) connector using commercial CEM software. The main method to get information of the impedance along the transmission line for a detailed inspection is the time domain reflectometry (TDR). A basic model will be discussed and the different approaches will be compared on that basis, followed by a concluding...
This paper presents a unified modeling and solving approach for multiphysics topology optimization. A multiphysics continuum field is usually controlled by certain partial differential equations (PDE). Based on the general form of the PDE, this paper presents the mathematical model of the multi-objective multiphysics topology optimization, derives the unified solving scheme of the PDE, gets the sensitivities...
This paper presents the problem formulation and design of compliant microgripper. The microgripper includes a fixed jaw and a movable jaw for engaging opposite surfaces of the article. Actuation of the compliant mechanism drives the movable jaw toward or away from the fixed jaw to close or open the jaws relative to one another. The travel path of the movable jaw is generally at right angles to the...
Memory circuit elements — resistors, capacitors and inductors with memory — are electronic components with great potential in a wide range of applications. In particular, they are ideally suited to enhance all three major computing paradigms: binary, analog and quantum. Here, we consider how to achieve a faster computation with these elements. Specifically, we will show that a binary logic architecture...
Most online e-learning systems often demand the pre-requisite requirements between course modules and/or some relationship measures between involved concepts to be explicitly inputed by the course instructors so that an optimizer can be ultimately used to find an optimal learning sequence of involved concepts or modules for each individual learner after considering his/her past performance, learner's...
In allusion to the frame of a light truck, by the iSIGHT for optimization platform and ANSYS for strength and stiffness calculation platform, with frame mass minimum for objective function, the parameters of the optimal thickness of the frame parts is sought and the optimal solution is obtained by using the first-order optimal design method with the premise of the frame strength, bending stiffness,...
Students do not always spend enough time studying. How can we encourage them to study more? In this paper, we show that a lot depends on the grading policy. At first glance, the problem of grading may seem straightforward: since our objective is that the students gain the largest amount of knowledge and skills at the end of the class, the grade should describe this amount. We show, however, that it...
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