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The concept of layout-centric defect inspection targeting specific configurations of design is not new. The majority of design-based Micro Care Areas (MCA) relies on historical findings — translating failing topologies from Failure Analysis (FA), Design-for-Manufacturing (DFM), and other sources into targeted zones tailored for inspection. However, there exists an inherent flaw to this model tied...
In group activities, tablet scale devices are convenient in applications, such as for trip group message broadcast/communication. This work is to provide proper charger topologies, and the targeted chargers charge all devices in the same time before given to users. The number of devices is from low tens to high tens. We analyze possible scenarios and propose two charger topologies. One is tube-shape...
In this study, an improved parametric level set method based on a self-organized acceleration scheme is proposed for the structural topology optimization of minimizing a global frequency response. The parametric level set method based on the compactly supported radial basis functions is used for building the relative mathematical model, in which a self-organized acceleration scheme based on topological...
In this paper, a Linear Flux-Switching Permanent Magnet Machine (LFSPMM) and Rotating six-phases Flux-Switching Permanent Magnet Machine (RFSPMM) are modeled and compared using FEM. The results from these models are discussed and compared with measurements, regarding shape and amplitude of the resulting back-EMF waveforms. Furthermore, by using current decoupling control algorithm, the second order...
As a potential candidate of high speed railway traction motor, interior permanent magnet synchronous motor (IPMSM) gains a lot of attention due to its inherent merits such as high torque density, excellent efficiency and superior controllability. This paper performs a design and comparative study of IPMSMs with five different rotor topologies, V shape, U shape, VV shape, VU shape and UU shape. The...
The paper deals with an approach to design the pole shape of inset permanent magnet fractional-slot tubular-linear synchronous machines (IPM T-LSMs). The study is initiated by a 2D finite element analysis (FEA)-based investigation of the effects of the pole-shaping on the machine no-load features. Such investigation is carried out while varying a single geometrical parameter: that is the angle characterizing...
The aim of the paper is to discuss the formulation and solution of optimisation problems for composite structures. A special attention is focused on the coding problems of design variables. The appropriate discrete coding allows us to use the same optimisation algorithms for different class of problems, i.e. shape and topology optimisation using both deterministic and fuzzy approaches.
We proposed a topology optimization method that incorporates the concept of cluster and cleaning method in Genetic algorithm (GA). This method can design a rotor structure from the empty space, which has high output power and less permanent magnet volume. In this paper, the effect of strength of the cleaning method on the obtained rotor structure is investigated. Using the optimal strength of the...
A new algorithm is introduced to compute the curve skeleton of 3D objects by using the notion of local convexity. The centers of maximal balls detected on the distance transform of the object are filtered to select as anchor points only those located on sharp local convexities of the object's boundary. Then, the skeleton is obtained by means of topology preserving removal operations. Pruning is finally...
Browser based simulators for wireless networks remain an unheard concept. Although wireless networks are utilized in various applications and are providing the backbone for the Internet of Things (IoT), it remains fairly difficult to quickly prototype a visualization. The need for an easily accessible simulator is a necessity, sparked by the alarming growth of sensor networks and the IoT. The development...
Shape-based registration methods frequently encounters in the domains of computer vision, image processing and medical imaging. The registration problem is to find an optimal transformation/mapping between sets of rigid or non-rigid objects and to automatically solve for correspondences. In this paper we present a comparison of two different probabilistic methods, the entropy and the growing neural...
In this paper, we propose a dense approach for 3D rotation estimation between spherical images, which is simultaneously able to recover the large rotations, robust under clutter and small translations. The key idea is to represent the spherical images by 3D shapes of the triangular mesh surfaces based on image intensity signal. This allows to apply the spherical harmonics representation as 3D shape...
The paper addresses the optimal design of electric machines, through the general setting of both shape and topology optimization. The optimization problems are efficiently solved with a classical gradient-based mathematical programming algorithm. An analytical sensitivity analysis for the nonlinear magnetostatic problem that can handle both shape and topology design variables, based on the Lie derivative...
A topology optimization method to maximize efficiency of IPM motors is proposed. In this method, the rotor topology is represented using on/off method based on the normalized Gaussian network. To obtain rotor shapes which are easily manufactured, a regularization term is introduced in the objective function. Moreover, a post-processing method which helps users interpret the optimization results is...
This paper proposes a magnetic structure optimization method of a linear oscillating actuator (LOA). The higher-efficient magnetic structure is necessary for reduction in size and weight of a LOA. In a conventional optimization method using a genetic algorithm (GA), it depends on a initial shape hard, and can't get a novel magnetic structure. In this paper, we propose the topology optimization method...
This paper presents a novel rotation estimation approach based on 3D mesh representation of spherical images. Indeed, unit sphere is becoming a natural space for projecting images captured from the central cameras (conventional and non-conventional cameras, as omnidirectional camera) and obtaining the spherical images. The proposed method relies on representing the spherical images into a 3D space...
Module localization is an important aspect of the operation of self-reconfigurable robots. The knowledge of spatial positions of modules, or at least of the overall shape which the modules form, is the usual prerequisite for reconfiguration planning. We present a general, decentralized algorithm for determining the positions of modules placed on a cubic grid from local sensor information. The connection...
We present a method for 3D tracking of deformable surfaces with dynamic topology, for instance a paper that undergoes cutting or tearing. Existing template-based methods assume a template of fixed topology. Thus, they fail in tracking deformable objects that undergo topological changes. In our work, we employ a dynamic template (3D mesh) whose topology evolves based on the topological changes of the...
In this paper, we focus on the control of triangular multi-agent formations with hybrid communication topology though distance-based approach. By saying hybrid topology, we mean that the communication topology contains both undirected and directed links, or in other words, the underlying graph of the formation contains both undirected and directed edges. A new type of graph, namely hybrid graph, is...
Skeleton is an important shape descriptor for de-formable shape matching, because it integrates both geometrical and topological features of a shape. As the skeletonisation process often generates redundant skeleton branches that may seriously disturb the skeleton matching and cause high computational complexity, skeleton pruning is required to remove the inaccurate or redundant branches while preserving...
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