The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper propose an improved MIP formulation to reach the objective of Unequal area facility layout problems (FLP) that is to minimize the total material handling cost. Facility layout problem is defined as locating departments in facility with a given dimension, and the departments can't overlap. The FLP can be formulated as a mixed-integer programming (MIP). In past researches, many researchers...
In this paper we focus on waveform coefficient matrix (WCEM) design to perform matched beampattern design with lower sidelobe level for generalized MIMO configurations. First, the relationship between transmit waveforms and beam-pattern, and the limitation of conventional waveform covariance matrix (WCVM) design are briefly discussed. Then a power approximation method (PAM) by minimizing both integrated...
Accurate cell segmentation is an important and long-standing challenge in biomedical image analysis due to large variations in shape and boundary ambiguity. In this paper, we present a segmentation framework for partially overlapping cervical cells. The proposed method starts by cellular clump estimation with morphological reconstruction. Subsequently, the nuclei inside the cellular clumps are located...
Positron emission tomography (PET) combined with computed tomography (CT) is a routine imaging modality for the diagnosis and interpretation of malignant diseases of the thorax. Accurate airway segmentation is critical for the localization of sites of abnormal metabolism detected with PET-CT. The vast majority of published segmentation algorithms, however, are designed for high- resolution CT and...
An important property of surface areas of objects as observed by a calibrated monocular camera is introduced; also improved techniques to apply the property to people number estimation are proposed. Standard surface area (SSA) is defined as the surface area of the reverse projection of an image-pixel onto a plane at specific height in the real world. SSA is calculated for each pixel according to camera...
In this paper, we propose an approach for two-dimensional shape representation and matching using the B-spline modelling and Dynamic Programming (DP), which is robust with respect to affine transformations such as translation, rotation, scale change and some distortions. Boundary shape is first splited into distinct parts based on the curvature. Curvature points are critical attributes for shape description,...
A new algorithm to detect straight edge parts which form the contour of an object presented in an image is discussed in this paper. This algorithm is very robust and can detect true straight edges even when their pixel's locations are not straight due to natural noise at the object borders. These straight edges are than used to report and classify contour's corners according to their angle and their...
This work improves algorithms for finding network flows both sustainable and robust against multilink-attack (MLA). It brings out the relationship between sustainability (flow solution before attack known as MLA-reliable flow) and robustness (flow value after attack known as MLA-robust flow). Both problems are known to be NP-hard. However, exact polynomial time algorithms exist for certain categories...
The linear quadratic optimal control problem with finite final time and fixed end-point for discrete linear time invariant systems is presented. The study takes into account the influence of the time variant perturbations in optimal control law implementation. The applicability of the proposed algorithm is validated by simulation tests.
This article presents methods that are used for historical shorthand documents recognition. We distinguish following tasks: binarization, clusterization, lines recognition and determination of symbols types (main, superscript, subscript). Each method is evaluated in terms of recall, precision and F-measure criteria. The best method for binarization of shorthand documents appeared to be the modified...
It is presented a theory that permits to calculate the ac dielectrophoretic force acting on biological cells and other micro- and nanoparticles of arbitrary shape. The theory includes intrinsically all the higher-order terms of dielectrophoretic force without additional computation costs. For sufficiently small electric field gradients the dielectrophoretic force is weighted by the induced cell dipole...
Channel estimation is a key issue for ultra-wideband (UWB) wireless communication systems. In this paper, we investigate UWB channel estimation, where the emerging compressed sensing (CS) is used to bypass the difficulty faced by Nyquist sampling. Particularly, we propose a couple of dual-kernel dictionaries, namely cross-derivative dictionary (CDD) and accessorial-derivative dictionary (ADD), to...
In this paper, we present a method to plan grasps for soft hands. Considering that soft hands can easily conform to the shape an the object, with preference to certain types of basic geometries and dimensions, we decompose the object into one type of these geometries, particularly into Minimal Volume Bounding Boxes (MVBBs), which are proved to be efficiently graspable by the hand we use. A set of...
In this communication, we discuss the potential and the perspectives of a new and effective framework to tackle the solution of inverse scattering problems. Starting from the statement that scattering phenomena can be recombined in many different ways (due to the linearity of Maxwell equations), it is possible to design suitable experiments where peculiar properties of the field or of the contrast...
Within radar cross-section measurement ranges polymeric foam columns are often used for the positioning of radar targets since they have a low radar cross-section. Although the shape of such dielectric structures can be optimized using electromagnetic simulation software, an analytical expression for their radar cross-section is useful for general design rules. Therefore an expression for the monostatic...
Centroid of a general type-2 (GT2) fuzzy set (FS) has been a critical concept. With the introduction of the α plane representation / the z slice representation for a GT2 FS, the centroid of a GT2 FS can be computed by calculating the centroid endpoints of its α planes using the Karnik-Mendel (KM) iterative algorithm. However, there lack closed form formulas for the centroid endpoints of the α planes...
This paper presents two approaches to externally influence a team of robots by means of time-varying density functions. These density functions represent rough references for where the robots should be located. Recently developed continuous-time algorithms move the robots so as to provide optimal coverage of a given the time-varying density functions. This makes it possible for a human operator to...
Power flow solvable boundary plays an important role in contingency analysis, security assessment, and planning processes. However, to construct the real solvable boundary in multidimensional parameter space is burdensome and time consuming. In this paper, we develop a new technique to approximate the solvable boundary of distribution systems based on Banach fixed point theorem. Not only the new technique...
We fabricated 〈100〉, 〈110〉, 〈111〉, and 〈112〉 p-channel gate-all-around Si nanowire (SiNW) MOSFETs, cross sections of which are rectangles with various widths, and investigated the hole mobility of the SiNW MOSFETs using the double Lm method. Measured hole mobilities of SiNW MOSFETs were about 80–140 cm2/Vs at surface carrier density of 1 × 1013 cm−2. The dependences of the hole mobility on orientations...
Recently, the Tunnel-FET is gaining interest due to its possibility to overcome the 60 mV/dec subthreshold slope limitation of the standard MOSFET. Due to its band-to-band (B2B) tunneling-based current transport mechanism, the requirements for sufficient tunneling models are raising. By taking into account various barrier shapes, tunneling distances and energy levels, the wavelet-based calculation...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.