Nowadays, several haptic devices are commercialized and becoming common not only in research fields but also in consumer use. In this paper, a new parallel link mechanism "DELTA-4" is proposed for a new hapt...
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ISBN:
(纸本)9781424427888
Nowadays, several haptic devices are commercialized and becoming common not only in research fields but also in consumer use. In this paper, a new parallel link mechanism "DELTA-4" is proposed for a new haptic device within high quality force display capability and operability. DELTA-4 consists of 3 DOF of translational motions. The key features of DELTA-4 comparing with conventional parallel link mechanisms are: a redundant actuation, a wide working area and a small footprint. The prototype is equipped with a 3 DOF of rotation mechanism, which its center of motions is located on the wrist position of an operator. An evaluation test of force display was conducted on a prototype of DELTA-4 mechanism.
When one expands a probability density in a series and truncates the series, the result is generally not a manifestly positive density. Such is the case, for example, in the classical Edgeworth and Gram-Charlier serie...
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ISBN:
(纸本)9781510626423
When one expands a probability density in a series and truncates the series, the result is generally not a manifestly positive density. Such is the case, for example, in the classical Edgeworth and Gram-Charlier series. In contrast, in quantum mechanics, approximation methods always retain the manifestly positive aspect of a probability density. We explore this fundamental difference and attempt to modify standard probability theory using the methods of quantum mechanics so that expansions result in a manifestly positive probability density.
We show that quantum probabilities for photon detection can be reproduced by a model in which classical random fields interact with detectors of the threshold type. This approach is applied to the old problem of disti...
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The great development of Information and Communication Technology (ICT) in recent years, especially network-based and cloud-based technologies, has led to a significant increase in efficiency of Building Information M...
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The great development of Information and Communication Technology (ICT) in recent years, especially network-based and cloud-based technologies, has led to a significant increase in efficiency of Building Information Modelling (BIM) platforms, which motivated a radical change in project managing in Architecture, Engineering and Construction (AEC) companies through implementation of collaborative working environments. However, the methodology used for implementing all the involved concepts has a direct influence on the results in terms of quality of AEC projects and efficiency in their development process. This paper focuses on the similarities and differences between two collaborative arrangements for BIM adoption in AEC projects, with a view to choosing best practices for civil construction works management and inspection offices in the context of public works in the Brazilian federal government. The first arrangement uses software from the same developer and proprietary formats, while the second uses software from different developers and formats suitable for interoperability between them. Based on the results, this work points out the limitations, advantages and disadvantages of using both arrangements, indicating research perspectives for industry and academia.
We are interested in embedding trees T with Delta(T) <= 4 in a rectangular grid, such that the vertices of T correspond to grid points, while edges of T correspond to non-intersecting straight segments of the grid ...
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We are interested in embedding trees T with Delta(T) <= 4 in a rectangular grid, such that the vertices of T correspond to grid points, while edges of T correspond to non-intersecting straight segments of the grid lines. Such embeddings are called straight models. While each edge is represented by a straight segment, a path of T is represented in the model by the union of the segments corresponding to its edges, which may consist of a path in the model having several bends. The aim is to determine a straight model of a given tree T minimizing the maximum number of bends over all paths of T. We provide a quadratic-time algorithm for this problem. We also show how to construct straight models that have k as its minimum number of bends and with the least number of vertices possible. As an application of our algorithm, we provide an upper bound on the number of bends of EPG models of VPT boolean AND EPT graphs. (C) 2021 The Authors. Published by Elsevier B.V.
The use of Internet of Things (IoT) technologies in aquaculture has transformed the management of aquatic resources by providing formerly unknown opportunities for automation, data collection, and decision-making. How...
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Despite the fact dynamic analysis techniques of software systems have been shown to be useful in many software engineering activities such as software maintenance, software performance, testing, etc., there is no stan...
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ISBN:
(纸本)9783642106187
Despite the fact dynamic analysis techniques of software systems have been shown to be useful in many software engineering activities such as software maintenance, software performance, testing, etc., there is no standard format for representing run-time information, which hinders interoperability and sharing of data. Runtime information is typically represented in the form of execution traces. Traces can contain different information, and can contain different types of information depending on what is being traced and the purpose of the trace. In this paper, we argue that traces represent vital knowledge about software that needs to be organized and modeled. We support our arguments by discussing the various types of traces used in the literature. We also discuss the challenges when dealing with execution traces and why a trace metamodel has to be carefully designed to overcome these challenges. We also discuss existing attempts to model execution traces. Finally, we discuss how the Knowledge Discovery Metamodel can be extended to support efficiently the modeling of large and complex execution traces.
The monoclinic crystal system $\beta$-gallium oxide $\left(\beta-\mathrm{Ga}_{2} \mathrm{O}_{3}\right)$ is a promising semiconductor with a large bandgap of $\sim 4.8 \mathrm{eV}$, the most stable form under ambient c...
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ISBN:
(数字)9798350377323
ISBN:
(纸本)9798350377330
The monoclinic crystal system $\beta$-gallium oxide $\left(\beta-\mathrm{Ga}_{2} \mathrm{O}_{3}\right)$ is a promising semiconductor with a large bandgap of $\sim 4.8 \mathrm{eV}$, the most stable form under ambient conditions, and transparent under ultraviolet (UV) light. In practical applications, it is important to effectively control the defects in $\beta-\mathrm{Ga}_{2} \mathrm{O}_{3}$. If the defect type and concentration cannot be strictly controlled, the stability and reliability of device performance will be greatly reduced. As one of the most common and important defects, Ga intrinsic vacancy has a great influence on the optoelectronic performance of $\beta-\mathrm{Ga}_{2} \mathrm{O}_{3}$, but it has not been systematically investigated with appropriate generalized approximations. In this paper, the effect of Ga vacancies on the structural, electronic and optical properties of $\beta-\mathrm{Ga}_{2} \mathrm{O}_{3}$ is systematically investigated by using the hybrid functional combined with the shell DFT-1/2 method, and the electronic properties such as energy band gap and electronic density of states, the structural properties such as elasticity constants and phonon dispersion, and the photoelectric properties such as permittivity constants, absorption spectra, and electronic energy-loss spectra are all calculated. The formation energy curves of the defects are also analyzed and discussed in detail. This study gives a viewpoint from the effect of Ga vacancies on $\beta-\mathrm{Ga}_{2} \mathrm{O}_{3}$ and demonstrates the advantages of shell DFT-1/2 calculations in ultra-wide bandgap semiconductors.
We present a feature and parameterization approach for constructing garment surface with garment sections from human body *** body section is obtained from polygonal 3D human models with the horizontal cutting plane b...
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We present a feature and parameterization approach for constructing garment surface with garment sections from human body *** body section is obtained from polygonal 3D human models with the horizontal cutting plane based on detecting feature points on human *** we make the interstice measure which converts from garment tolerance as the parameter to build garment sections from body *** Surface is constructed with garment sections by an improved angle synchronous method.
Given a set S of n points in R/sup D/, D/spl ges/2. Each point p/spl isin/S is assigned a color c(p) chosen from a fixed color set. The All-Nearest-Foreign-Neighbors Problem (ANFNP) is to find for each point p/spl isi...
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Given a set S of n points in R/sup D/, D/spl ges/2. Each point p/spl isin/S is assigned a color c(p) chosen from a fixed color set. The All-Nearest-Foreign-Neighbors Problem (ANFNP) is to find for each point p/spl isin/S its nearest foreign neighbors, i.e. the set of all points in S/{p} that are closest to p among the points in S with a color different from c(p). We introduce the Well Separated Color Decomposition (WSCD) which gives an optimal O(log n) parallel algorithm to solve the AMFNP, for fixed dimension D/spl ges/2 and fixed L/sup t/-metric d/sub t/, 1/spl les/t/spl les//spl infin/. The WSCD is based upon the Well Separated Pair Decomposition (Callahan et al., 1992). The ANFNP finds extensive applications in VLSI design and verification for two dimensions, and in traffic-control systems and Geographic Information Systems for D>2 dimensions. To the best of our knowledge, this is the only known optimal parallel algorithm for the ANFNP.
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