**Commenced**in January 2007

**Frequency:**Monthly

**Edition:**International

**Paper Count:**2260

# Search results for: Learning Curve

##### 2260 Cost and Productivity Experiences of Pakistan with Aggregate Learning Curve

**Authors:**
Jamshaid ur Rehman,
Shahida Wizarat

**Abstract:**

**Keywords:**
Cost,
Inflection Point,
Learning Curve,
Minima,
Maxima,
and Productivity

##### 2259 The Control Vector Scheme for Design of Planar Primitive PH curves

**Authors:**
Ching-Shoei Chiang,
Sheng-Hsin Tsai,
James Chen

**Abstract:**

**Keywords:**
PH curve,
hodograph,
Bézier curve.

##### 2258 Comparison of the Distillation Curve Obtained Experimentally with the Curve Extrapolated by a Commercial Simulator

**Authors:**
Lívia B. Meirelles,
Erika C. A. N. Chrisman,
Flávia B. de Andrade,
Lilian C. M. de Oliveira

**Abstract:**

**Keywords:**
Distillation curve,
petroleum distillation,
simulation,
true boiling point curve.

##### 2257 Detection of Keypoint in Press-Fit Curve Based on Convolutional Neural Network

**Authors:**
Shoujia Fang,
Guoqing Ding,
Xin Chen

**Abstract:**

**Keywords:**
Keypoint detection,
curve feature,
convolutional neural
network,
press-fit assembly.

##### 2256 Approximating Maximum Speed on Road from Curvature Information of Bezier Curve

**Authors:**
M. Y. Misro,
A. Ramli,
J. M. Ali

**Abstract:**

**Keywords:**
Speed estimation,
path constraints,
reference
trajectory,
Bezier curve.

##### 2255 Parametric Transition as a Spiral Curve and Its Application in Spur Gear Tooth with FEA

**Authors:**
S. H. Yahaya,
J. M. Ali,
T.A. Abdullah

**Abstract:**

**Keywords:**
Bézier-like cubic function,
Curvature continuity,
Cshapedtransition curve,
Spur gear tooth.

##### 2254 Determination the Curve Number Catchment by Using GIS and Remote Sensing

**Authors:**
Abouzar Nasiri,
Hamid Alipur

**Abstract:**

In recent years, geographic information systems (GIS) and remote sensing using has increased to estimate runoff catchment. In this research, runoff curve number maps for captive catchment of Tehran by helping GIS and also remote sensing which based on factors such as vegetation, lands using, group of soil hydrology and hydrological conditions were obtained. Runoff curve numbers map was obtained by combining these maps in ARC GIS and SCS table. To evaluate the accuracy of the results, the maximum flow rate of flood which was obtained from curve numbers, was compared with the measured maximum flood rate at the watershed outlet and correctness of curve numbers were approved.

**Keywords:**
Curve number,
GIS,
Remote sensing,
Runoff.

##### 2253 Accurate Dimensional Measurement of 3D Round Holes Based on Stereo Vision

**Authors:**
Zhiguo Ren,
Lilong Cai

**Abstract:**

This paper present an effective method to accurately reconstruct and measure the 3D curve edges of small industrial parts based on stereo vision. To effectively fit the curve of the measured parts using a series of line segments in the images, a strategy from coarse to fine is employed based on multi-scale curve fitting. After reconstructing the 3D curve of a hole through a curved surface, its axis is adjusted so that it is parallel to the Z axis with least squares error and the dimensions of the hole can be calculated on the XY plane easily. Experimental results show that the presented method can accurately measure the dimensions of round holes through a curved surface.

**Keywords:**
Stereo Vision,
3D Round Hole Measurement,
Curve Fitting,
3D Curve Reconstruction,
Least Squares Error.

##### 2252 Solving 94-bit ECDLP with 70 Computers in Parallel

**Authors:**
Shunsuke Miyoshi,
Yasuyuki Nogami,
Takuya Kusaka,
Nariyoshi Yamai

**Abstract:**

**Keywords:**
Pollard’s rho method,
BN curve,
Montgomery
multiplication.

##### 2251 Generating Arabic Fonts Using Rational Cubic Ball Functions

**Authors:**
Fakharuddin Ibrahim,
Jamaludin Md. Ali,
Ahmad Ramli

**Abstract:**

^{1}continuity. The conditions considered are known as the G

^{1}Hermite condition. A simple application of the proposed method is to generate an Arabic font satisfying the required continuity.

**Keywords:**
Continuity,
data interpolation,
Hermite condition,
rational Ball curve.

##### 2250 Proposed Developments of Elliptic Curve Digital Signature Algorithm

**Authors:**
Sattar B. Sadkhan,
Najlae Falah Hameed

**Abstract:**

**Keywords:**
Elliptic Curve Digital Signature Algorithm,
DSA.

##### 2249 Choosing between the Regression Correlation, the Rank Correlation, and the Correlation Curve

**Authors:**
Roger L Goodwin

**Abstract:**

**Keywords:**
Bayesian estimation,
regression model,
rank
statistics,
correlation,
correlation curve.

##### 2248 Preparing the Curve Number (CN) and Surface Runoff Coefficient (C) Map of the Basin in the Aghche Watershed, Iran

**Authors:**
Ali Gholami,
Ebrahim Panahpour,
Amir Hossein Davami

**Abstract:**

**Keywords:**
Aghche Watershed,
Curve Numbers (CV),
Land UseChanges,
Surface Runoff Coefficient(C) Map,
W indicator

##### 2247 On the Determination of a Time-like Dual Curve in Dual Lorentzian Space

**Authors:**
Emin Özyılmaz

**Abstract:**

**Keywords:**
Classical Differential Geometry,
Dual Numbers,
DualFrenet Equations,
Time-like Dual Curve,
Position Vector,
DualLorentzian Space.

##### 2246 Optimized Calculation of Hourly Price Forward Curve (HPFC)

**Authors:**
Ahmed Abdolkhalig

**Abstract:**

**Keywords:**
Forward curve,
furrier series,
regression,
radial basic
function neural networks.

##### 2245 Oscillation Effect of the Multi-stage Learning for the Layered Neural Networks and Its Analysis

**Authors:**
Isao Taguchi,
Yasuo Sugai

**Abstract:**

This paper proposes an efficient learning method for the layered neural networks based on the selection of training data and input characteristics of an output layer unit. Comparing to recent neural networks; pulse neural networks, quantum neuro computation, etc, the multilayer network is widely used due to its simple structure. When learning objects are complicated, the problems, such as unsuccessful learning or a significant time required in learning, remain unsolved. Focusing on the input data during the learning stage, we undertook an experiment to identify the data that makes large errors and interferes with the learning process. Our method devides the learning process into several stages. In general, input characteristics to an output layer unit show oscillation during learning process for complicated problems. The multi-stage learning method proposes by the authors for the function approximation problems of classifying learning data in a phased manner, focusing on their learnabilities prior to learning in the multi layered neural network, and demonstrates validity of the multi-stage learning method. Specifically, this paper verifies by computer experiments that both of learning accuracy and learning time are improved of the BP method as a learning rule of the multi-stage learning method. In learning, oscillatory phenomena of a learning curve serve an important role in learning performance. The authors also discuss the occurrence mechanisms of oscillatory phenomena in learning. Furthermore, the authors discuss the reasons that errors of some data remain large value even after learning, observing behaviors during learning.

**Keywords:**
data selection,
function approximation problem,
multistage leaning,
neural network,
voluntary oscillation.

##### 2244 ROC Analysis of PVC Detection Algorithm using ECG and Vector-ECG Charateristics

**Authors:**
J. S. Nah,
A. Y. Jeon,
J. H. Ro,
G. R. Jeon

**Abstract:**

**Keywords:**
Vectorcardiogram (VCG),
Premature Ventricular
contraction (PVC),
ROC (receiver operating characteristic) curve,
ECG

##### 2243 The Study of Relative Efficiency in Growth Curve Model

**Authors:**
Nan Chen,
Baoguang Tian

**Abstract:**

In this paper, some relative efficiency have been discussed, including the LSE estimate with respect to BLUE in curve model. Four new kinds of relative efficiency have defined, and their upper bounds have been discussed.

**Keywords:**
Relative efficiency,
LSE estimate,
BLUE estimate,
Upper bound,
Curve model.

##### 2242 A Bathtub Curve from Nonparametric Model

**Authors:**
Eduardo C. Guardia,
Jose W. M. Lima,
Afonso H. M. Santos

**Abstract:**

This paper presents a nonparametric method to obtain the hazard rate “Bathtub curve” for power system components. The model is a mixture of the three known phases of a component life, the decreasing failure rate (DFR), the constant failure rate (CFR) and the increasing failure rate (IFR) represented by three parametric Weibull models. The parameters are obtained from a simultaneous fitting process of the model to the Kernel nonparametric hazard rate curve. From the Weibull parameters and failure rate curves the useful lifetime and the characteristic lifetime were defined. To demonstrate the model the historic time-to-failure of distribution transformers were used as an example. The resulted “Bathtub curve” shows the failure rate for the equipment lifetime which can be applied in economic and replacement decision models.

**Keywords:**
Bathtub curve,
failure analysis,
lifetime estimation,
parameter estimation,
Weibull distribution.

##### 2241 A Simple Method for Tracing PV Curve of a Radial Transmission Line

**Authors:**
Asfar Ali Khan

**Abstract:**

**Keywords:**
Power Transfer,
PV Curve,
Voltage Stability.

##### 2240 Application of Generalized NAUT B-Spline Curveon Circular Domain to Generate Circle Involute

**Authors:**
Ashok Ganguly,
Pranjali Arondekar

**Abstract:**

In the present paper, we use generalized B-Spline curve in trigonometric form on circular domain, to capture the transcendental nature of circle involute curve and uncertainty characteristic of design. The required involute curve get generated within the given tolerance limit and is useful in gear design.

**Keywords:**
Bézier,
Circle Involute,
NAUT B-Spline,
Spur Gear.

##### 2239 Position Vector of a Partially Null Curve Derived from a Vector Differential Equation

**Authors:**
Süha Yılmaz,
Emin Özyılmaz,
Melih Turgut,
Şuur Nizamoğlu

**Abstract:**

In this paper, position vector of a partially null unit speed curve with respect to standard frame of Minkowski space-time is studied. First, it is proven that position vector of every partially null unit speed curve satisfies a vector differential equation of fourth order. In terms of solution of the differential equation, position vector of a partially null unit speed curve is expressed.

**Keywords:**
Frenet Equations,
Partially Null Curves,
Minkowski Space-time,
Vector Differential Equation.

##### 2238 An Approach to Polynomial Curve Comparison in Geometric Object Database

**Authors:**
Chanon Aphirukmatakun,
Natasha Dejdumrong

**Abstract:**

**Keywords:**
Bezier curve,
Said-Ball curve,
Wang-Ball curve,
DP curve,
CAGD,
comparison,
geometric object database.

##### 2237 Dynamic Voltage Stability Estimation using Particle Filter

**Authors:**
Osea Zebua,
Norikazu Ikoma,
Hiroshi Maeda

**Abstract:**

**Keywords:**
normalized PV curve,
optimal filtering method particle filter,
voltage stability.

##### 2236 Learning to Order Terms: Supervised Interestingness Measures in Terminology Extraction

**Authors:**
Jérôme Azé,
Mathieu Roche,
Yves Kodratoff,
Michèle Sebag

**Abstract:**

**Keywords:**
Text-mining,
Terminology Extraction,
Evolutionary
algorithm,
ROC Curve.

##### 2235 An Attack on the Lucas Based El-Gamal Cryptosystem in the Elliptic Curve Group Over Finite Field Using Greater Common Divisor

**Authors:**
Lee Feng Koo,
Tze Jin Wong,
Pang Hung Yiu,
Nik Mohd Asri Nik Long

**Abstract:**

Greater common divisor (GCD) attack is an attack that relies on the polynomial structure of the cryptosystem. This attack required two plaintexts differ from a fixed number and encrypted under same modulus. This paper reports a security reaction of Lucas Based El-Gamal Cryptosystem in the Elliptic Curve group over finite field under GCD attack. Lucas Based El-Gamal Cryptosystem in the Elliptic Curve group over finite field was exposed mathematically to the GCD attack using GCD and Dickson polynomial. The result shows that the cryptanalyst is able to get the plaintext without decryption by using GCD attack. Thus, the study concluded that it is highly perilous when two plaintexts have a slight difference from a fixed number in the same Elliptic curve group over finite field.

**Keywords:**
Decryption,
encryption,
elliptic curve,
greater common divisor.

##### 2234 Developing of Fragility Curve for Two-Span Simply Supported Concrete Bridge in Near-Fault Area

**Authors:**
S. Shirazian,
M.R. Ghayamghamian,
G.R. Nouri

**Abstract:**

**Keywords:**
Fragility curve,
Seismic behavior,
Time historyanalysis,
Transportation Network.

##### 2233 Implementation and Analysis of Elliptic Curve Cryptosystems over Polynomial basis and ONB

**Authors:**
Yong-Je Choi,
Moo-Seop Kim,
Hang-Rok Lee,
Ho-Won Kim

**Abstract:**

**Keywords:**
Elliptic Curve Cryptosystem,
Crypto Algorithm,
Polynomial Basis,
Optimal Normal Basis,
Security.

##### 2232 A Hybrid Particle Swarm Optimization-Nelder- Mead Algorithm (PSO-NM) for Nelson-Siegel- Svensson Calibration

**Authors:**
Sofia Ayouche,
Rachid Ellaia,
Rajae Aboulaich

**Abstract:**

**Keywords:**
Optimization,
zero-coupon curve,
Nelson-Siegel-
Svensson,
Particle Swarm Optimization,
Nelder-Mead Algorithm.

##### 2231 Combination of Different Classifiers for Cardiac Arrhythmia Recognition

**Authors:**
M. R. Homaeinezhad,
E. Tavakkoli,
M. Habibi,
S. A. Atyabi,
A. Ghaffari

**Abstract:**

**Keywords:**
Feature Extraction,
Curve Length Method,
SupportVector Machine,
Learning Vector Quantization,
Multi Layer Perceptron,
Fusion (Hybrid) Classification,
Arrhythmia Classification,
Supervised Learning Machine.