**Commenced**in January 2007

**Frequency:**Monthly

**Edition:**International

**Paper Count:**4994

# Search results for: uniform design

##### 4994 An Optimized Design of Non-uniform Filterbank

**Authors:**
Ram Kumar Soni,
Alok Jain,
Rajiv Saxena

**Abstract:**

**Keywords:**
Tree structure,
NUFB,
QMF,
NPR.

##### 4993 On the Invariant Uniform Roe Algebra as Crossed Product

**Authors:**
Kankeyanathan Kannan

**Abstract:**

The uniform Roe C*-algebra (also called uniform translation)C^*- algebra provides a link between coarse geometry and C^*- algebra theory. The uniform Roe algebra has a great importance in geometry, topology and analysis. We consider some of the elementary concepts associated with coarse spaces.

**Keywords:**
Invariant Approximation Property,
Uniform Roe algebras.

##### 4992 A Family of Distributions on Learnable Problems without Uniform Convergence

**Authors:**
César Garza

**Abstract:**

In supervised binary classification and regression problems, it is well-known that learnability is equivalent to uniform convergence of the hypothesis class, and if a problem is learnable, it is learnable by empirical risk minimization. For the general learning setting of unsupervised learning tasks, there are non-trivial learning problems where uniform convergence does not hold. We present here the task of learning centers of mass with an extra feature that “activates” some of the coordinates over the unit ball in a Hilbert space. We show that the learning problem is learnable under a stable RLM rule. We introduce a family of distributions over the domain space with some mild restrictions for which the sample complexity of uniform convergence for these problems must grow logarithmically with the dimension of the Hilbert space. If we take this dimension to infinity, we obtain a learnable problem for which the uniform convergence property fails for a vast family of distributions.

**Keywords:**
Statistical learning theory,
learnability,
uniform
convergence,
stability,
regularized loss minimization.

##### 4991 Data Oriented Modeling of Uniform Random Variable: Applied Approach

**Authors:**
Ahmad Habibizad Navin,
Mehdi Naghian Fesharaki,
Mirkamal Mirnia,
Mohamad Teshnelab,
Ehsan Shahamatnia

**Abstract:**

**Keywords:**
Uniform random variable,
Data oriented modeling,
Statistical inference,
Prodigraph,
Statistically complete tree,
Uniformdigital probability digraph,
Uniform n-complete probability tree.

##### 4990 Influence of Optical Fluence Distribution on Photoacoustic Imaging

**Authors:**
Mohamed K. Metwally,
Sherif H. El-Gohary,
Kyung Min Byun,
Seung Moo Han,
Soo Yeol Lee,
Min Hyoung Cho,
Gon Khang,
Jinsung Cho,
Tae-Seong Kim

**Abstract:**

Photoacoustic imaging (PAI) is a non-invasive and non-ionizing imaging modality that combines the absorption contrast of light with ultrasound resolution. Laser is used to deposit optical energy into a target (i.e., optical fluence). Consequently, the target temperature rises, and then thermal expansion occurs that leads to generating a PA signal. In general, most image reconstruction algorithms for PAI assume uniform fluence within an imaging object. However, it is known that optical fluence distribution within the object is non-uniform. This could affect the reconstruction of PA images. In this study, we have investigated the influence of optical fluence distribution on PA back-propagation imaging using finite element method. The uniform fluence was simulated as a triangular waveform within the object of interest. The non-uniform fluence distribution was estimated by solving light propagation within a tissue model via Monte Carlo method. The results show that the PA signal in the case of non-uniform fluence is wider than the uniform case by 23%. The frequency spectrum of the PA signal due to the non-uniform fluence has missed some high frequency components in comparison to the uniform case. Consequently, the reconstructed image with the non-uniform fluence exhibits a strong smoothing effect.

**Keywords:**
Finite Element Method,
Fluence Distribution,
Monte
Carlo Method,
Photoacoustic Imaging.

##### 4989 Design of Non-uniform Circular Antenna Arrays Using Firefly Algorithm for Side Lobe Level Reduction

**Authors:**
Gopi Ram,
Durbadal Mandal,
Rajib Kar,
Sakti Prasad Ghoshal

**Abstract:**

A design problem of non-uniform circular antenna arrays for maximum reduction of both the side lobe level (SLL) and first null beam width (FNBW) is dealt with. This problem is modeled as a simple optimization problem. The method of Firefly algorithm (FFA) is used to determine an optimal set of current excitation weights and antenna inter-element separations that provide radiation pattern with maximum SLL reduction and much improvement on FNBW as well. Circular array antenna laid on *x-y *plane is assumed. FFA is applied on circular arrays of 8-, 10-, and 12- elements. Various simulation results are presented and hence performances of side lobe and FNBW are analyzed. Experimental results show considerable reductions of both the SLL and FNBW with respect to those of the uniform case and some standard algorithms GA, PSO and SA applied to the same problem.

**Keywords:**
Circular arrays,
First null beam width,
Side lobe level,
FFA.

##### 4988 Performance Analysis of OQSMS and MDDR Scheduling Algorithms for IQ Switches

**Authors:**
K. Navaz,
Kannan Balasubramanian

**Abstract:**

**Keywords:**
Multicast,
Switch,
Delay,
Scheduling.

##### 4987 Evaluation of Stent Performances using FEA considering a Realistic Balloon Expansion

**Authors:**
Won-Pil Park,
Seung-Kwan Cho,
Jai-Young Ko,
Anders Kristensson,
S.T.S. Al-Hassani,
Han-Sung Kim,
Dohyung Lim

**Abstract:**

**Keywords:**
Finite Element Analysis,
Mechanical Characteristic,
Transient Non-uniform Balloon-Stent Expansion,
Vascular Stent.

##### 4986 Uniform Heating during Focused Ultrasound Thermal Therapy

**Authors:**
To-Yuan Chen,
Tzu-Ching Shih,
Hao-Li Liu,
Kuen-Cheng Ju

**Abstract:**

**Keywords:**
focused ultrasound,
thermal therapy,
uniform heating,
iteration,
extrapolation,
scan

##### 4985 Comparison of Response Surface Designs in a Spherical Region

**Authors:**
Boonorm Chomtee,
John J. Borkowski

**Abstract:**

**Keywords:**
design optimality criteria,
reduced models,
response
surface design,
spherical design region

##### 4984 Fast and Efficient Algorithms for Evaluating Uniform and Nonuniform Lagrange and Newton Curves

**Authors:**
Taweechai Nuntawisuttiwong,
Natasha Dejdumrong

**Abstract:**

**Keywords:**
Newton interpolation,
Lagrange interpolation,
linear
complexity.

##### 4983 An Interference Reduction Strategy for TDD-OFDMA Cellular Systems

**Authors:**
Koudjo M. Koumadi,
Kester Quist-Aphetsi,
Robert A. Sowah,
Amevi Acakpovi

**Abstract:**

Downlink/Uplink (DL/UL) time slot allocation (TSA) in time division duplex (TDD) systems is generally uniform for all the cells. This TSA however is not efficient in case of different traffic asymmetry ratios in different cells. We first propose a new 3-coordinate architecture to identify cells in an orthogonal frequency division multiple access (OFDMA) system where each cell is divided into three sectors. Then, this coordinate system is used to derive a TSA for symmetric traffic. Mathematical analysis and simulations are used to show that the proposed TSA outperforms the traditional all uniform type of TSA in terms of total intercellular interference, even under uniform symmetrical traffic. Two adaptation strategies are further proposed to adjust the proposed TSA to asymmetrical traffic with different DL/UL traffic ratios in different cells. Further simulation results show that the adaptation strategies also yield higher signal-to-interference ratio (SIR).

**Keywords:**
Crossed TSA,
different-entity interference,
same-entity interference,
uniform TSA

##### 4982 On the Exact Solution of Non-Uniform Torsion for Beams with Axial Symmetric Cross-Section

**Authors:**
A.Campanile,
M. Mandarino,
V. Piscopo,
A. Pranzitelli

**Abstract:**

**Keywords:**
Non-uniform torsion,
Axial symmetric cross-section,
Fourier series,
Helmholtz equation,
FE method.

##### 4981 Simulation-Based Optimization of a Non-Uniform Piezoelectric Energy Harvester with Stack Boundary

**Authors:**
Alireza Keshmiri,
Shahriar Bagheri,
Nan Wu

**Abstract:**

**Keywords:**
Piezoelectricity,
energy harvesting,
simulation-based optimization,
artificial neural network,
genetic algorithm.

##### 4980 Electrical Performance of a Solid Oxide Fuel Cell Unit with Non-Uniform Inlet Flow and High Fuel Utilization

**Authors:**
Ping Yuan,
Mu-Sheng Chiang,
Syu-Fang Liu,
Shih-Bin Wang,
Ming-Jun Kuo

**Abstract:**

**Keywords:**
Performance,
Solid oxide fuel cell,
non-uniform,
fuelutilization

##### 4979 3D Mesh Coarsening via Uniform Clustering

**Authors:**
Shuhua Lai,
Kairui Chen

**Abstract:**

**Keywords:**
Coarsening,
mesh clustering,
shape approximation,
mesh simplification.

##### 4978 Thermal Post-buckling of Shape Memory Alloy Composite Plates under Non-uniform Temperature Distribution

**Authors:**
Z.A. Rasid,
R. Zahari,
A. Ayob,
D.L. Majid,
A.S.M. Rafie

**Abstract:**

**Keywords:**
Post-buckling,
shape memory alloy,
temperaturedependent property,
tent-like temperature distribution

##### 4977 Comparison of Back-Projection with Non-Uniform Fast Fourier Transform for Real-Time Photoacoustic Tomography

**Authors:**
Moung Young Lee,
Chul Gyu Song

**Abstract:**

**Keywords:**
Back-projection,
image comparison,
non-uniform FFT,
photoacoustic tomography.

##### 4976 Numerical Solution of Manning's Equation in Rectangular Channels

**Authors:**
Abdulrahman Abdulrahman

**Abstract:**

**Keywords:**
Channel design,
civil engineering,
hydraulic engineering,
open channel flow,
Manning's equation,
normal depth,
uniform flow.

##### 4975 Unsteady Water Boundary Layer Flow with Non-Uniform Mass Transfer

**Authors:**
G. Revathi,
P. Saikrishnan

**Abstract:**

**Keywords:**
Boundary layer,
heat transfer,
non-similar solution,
non-uniform mass,
unsteady flow.

##### 4974 Determination of Non Uniform Sinusoidal Microstrip Leaky-Wave Antenna Radiating Performances in Millimeter Band

**Authors:**
Zahéra Mekkioui

**Abstract:**

**Keywords:**
antenna,
leaky-wave,
performances,
sinusoidal.

##### 4973 Marangoni Instability in a Fluid Layer with Insoluble Surfactant

**Authors:**
Ainon Syazana Ab. Hamid,
Seripah Awang Kechil,
Ahmad Sukri Abd. Aziz

**Abstract:**

**Keywords:**
Analytical solutions,
Marangoni Instability,
Nondeformable free surface,
Surfactant.

##### 4972 Effect of Channel Estimation on Capacity of MIMO System Employing Circular or Linear Receiving Array Antennas

**Authors:**
Xia Liu,
Marek E. Bialkowski

**Abstract:**

**Keywords:**
MIMO,
channel capacity,
channel estimation,
ULA,
UCA,
spatial correlation

##### 4971 Simulation and Design of the Geometric Characteristics of the Oscillatory Thermal Cycler

**Authors:**
Tse-Yu Hsieh,
Jyh-Jian Chen

**Abstract:**

**Keywords:**
Polymerase chain reaction,
oscillatory thermal
cycler,
standard deviation of temperature,
nature convective.

##### 4970 Modern State of the Universal Modeling for Centrifugal Compressors

**Authors:**
Y. Galerkin,
K. Soldatova,
A. Drozdov

**Abstract:**

The 6th version of Universal modeling method for centrifugal compressor stage calculation is described. Identification of the new mathematical model was made. As a result of identification the uniform set of empirical coefficients is received. The efficiency definition error is 0,86 % at a design point. The efficiency definition error at five flow rate points (except a point of the maximum flow rate) is 1,22 %. Several variants of the stage with 3D impellers designed by 6th version program and quasi threedimensional calculation programs were compared by their gas dynamic performances CFD (NUMECA FINE TURBO). Performance comparison demonstrated general principles of design validity and leads to some design recommendations.

**Keywords:**
Compressor design,
loss model,
performance
prediction,
test data,
model stages,
flow rate coefficient,
work
coefficient.

##### 4969 Determination and Assessment of Ground Motion and Spectral Parameters for Iran

**Authors:**
G. Ghodrati Amiri,
M. Khorasani,
Razavian Ameri,
M.Mohamadi Dehcheshmeh,
S.Fathi

**Abstract:**

**Keywords:**
Attenuation Relationships,
Iran,
Probabilistic Seismic
Hazard Analysis,
Tehran,
Uniform Duration

##### 4968 Magnetic Field Effects on Parabolic Graphene Quantum Dots with Topological Defects

**Authors:**
Defne Akay,
Bekir S. Kandemir

**Abstract:**

**Keywords:**
Coulomb impurity,
graphene cones,
graphene
quantum dots,
topological defects.

##### 4967 Computing Center Conditions for Non-analytic Vector Fields with Constant Angular Speed

**Authors:**
Li Feng

**Abstract:**

We investigate the planar quasi-septic non-analytic systems which have a center-focus equilibrium at the origin and whose angular speed is constant. The system could be changed into an analytic system by two transformations, with the help of computer algebra system MATHEMATICA, the conditions of uniform isochronous center are obtained.

**Keywords:**
Non-analytic,
center–focus problem,
Lyapunov constant,
uniform isochronous center.

##### 4966 Mining of Interesting Prediction Rules with Uniform Two-Level Genetic Algorithm

**Authors:**
Bilal Alatas,
Ahmet Arslan

**Abstract:**

The main goal of data mining is to extract accurate, comprehensible and interesting knowledge from databases that may be considered as large search spaces. In this paper, a new, efficient type of Genetic Algorithm (GA) called uniform two-level GA is proposed as a search strategy to discover truly interesting, high-level prediction rules, a difficult problem and relatively little researched, rather than discovering classification knowledge as usual in the literatures. The proposed method uses the advantage of uniform population method and addresses the task of generalized rule induction that can be regarded as a generalization of the task of classification. Although the task of generalized rule induction requires a lot of computations, which is usually not satisfied with the normal algorithms, it was demonstrated that this method increased the performance of GAs and rapidly found interesting rules.

**Keywords:**
Classification rule mining,
data mining,
genetic algorithms.

##### 4965 Rational Structure of Cable Truss

**Authors:**
V. Goremikins,
K. Rocens,
D. Serdjuks

**Abstract:**

One of the main problems of suspended cable structures is initial shape change under the action of non uniform load. The problem can be solved by increasing of weight of construction or by using of prestressing. But this methods cause increasing of materials consumption of suspended cable structure. The cable truss usage is another way how the problem of shape change under the action of non uniform load can be fixed. The cable trusses with the vertical and inclined suspensions, cross web and single cable were analyzed as the main load-bearing structures of suspension bridge. It was shown, that usage of cable truss allows to reduce the vertical displacements up to 32% in comparison with the single cable in case of non uniformly distributed load. In case of uniformly distributed load single cable is preferable.

**Keywords:**
Cable trusses,
Non uniform load,
Suspension bridge,
Vertical displacements.