**Commenced**in January 2007

**Frequency:**Monthly

**Edition:**International

**Paper Count:**3304

# Search results for: power curve

##### 3304 A Simple Method for Tracing PV Curve of a Radial Transmission Line

**Authors:**
Asfar Ali Khan

**Abstract:**

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

##### 3303 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.

##### 3302 A Study on Method for Identifying Capacity Factor Declination of Wind Turbines

**Authors:**
Dongheon Shin,
Kyungnam Ko,
Jongchul Huh

**Abstract:**

The investigation on wind turbine degradation was carried out using the nacelle wind data. The three Vestas V80-2MW wind turbines of Sungsan wind farm in Jeju Island, South Korea were selected for this work. The SCADA data of the wind farm for five years were analyzed to draw power curve of the turbines. It is assumed that the wind distribution is the Rayleigh distribution to calculate the normalized capacity factor based on the drawn power curve of the three wind turbines for each year. The result showed that the reduction of power output from the three wind turbines occurred every year and the normalized capacity factor decreased to 0.12%/year on average.

**Keywords:**
Wind energy,
Power curve,
Capacity factor,
Annual
energy production.

##### 3301 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.

##### 3300 Generator Capability Curve Constraint for PSO Based Optimal Power Flow

**Authors:**
Mat Syai'in,
Adi Soeprijanto,
Takashi Hiyama

**Abstract:**

**Keywords:**
Optimal Power Flow,
Generator Capability Curve,
Particle Swarm Optimization,
Neural Network

##### 3299 Neural Network Optimal Power Flow(NN-OPF) based on IPSO with Developed Load Cluster Method

**Authors:**
Mat Syai'in,
Adi Soeprijanto

**Abstract:**

**Keywords:**
Optimal Power Flow,
Generator Capability Curve,
Improved Particle Swarm Optimization,
Neural Network

##### 3298 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.

##### 3297 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.

##### 3296 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.

##### 3295 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.

##### 3294 Implementing Authentication Protocol for Exchanging Encrypted Messages via an Authentication Server Based on Elliptic Curve Cryptography with the ElGamal-s Algorithm

**Authors:**
Konstantinos Chalkias,
George Filiadis,
George Stephanides

**Abstract:**

In this paper the authors propose a protocol, which uses Elliptic Curve Cryptography (ECC) based on the ElGamal-s algorithm, for sending small amounts of data via an authentication server. The innovation of this approach is that there is no need for a symmetric algorithm or a safe communication channel such as SSL. The reason that ECC has been chosen instead of RSA is that it provides a methodology for obtaining high-speed implementations of authentication protocols and encrypted mail techniques while using fewer bits for the keys. This means that ECC systems require smaller chip size and less power consumption. The proposed protocol has been implemented in Java to analyse its features and vulnerabilities in the real world.

**Keywords:**
Elliptic Curve Cryptography,
ElGamal,
authentication protocol.

##### 3293 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.

##### 3292 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.

##### 3291 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.

##### 3290 Proposed Developments of Elliptic Curve Digital Signature Algorithm

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

**Abstract:**

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

##### 3289 Biogas Control: Methane Production Monitoring Using Arduino

**Authors:**
W. Ait Ahmed,
M. Aggour,
M. Naciri

**Abstract:**

**Keywords:**
Biogas,
Arduino,
processing,
code,
methane,
gas sensor,
program.

##### 3288 RF Power Consumption Emulation Optimized with Interval Valued Homotopies

**Authors:**
Deogratius Musiige,
François Anton,
Vital Yatskevich,
Laulagnet Vincent,
Darka Mioc,
Nguyen Pierre

**Abstract:**

This paper presents a methodology towards the emulation of the electrical power consumption of the RF device during the cellular phone/handset transmission mode using the LTE technology. The emulation methodology takes the physical environmental variables and the logical interface between the baseband and the RF system as inputs to compute the emulated power dissipation of the RF device. The emulated power, in between the measured points corresponding to the discrete values of the logical interface parameters is computed as a polynomial interpolation using polynomial basis functions. The evaluation of polynomial and spline curve fitting models showed a respective divergence (test error) of 8% and 0.02% from the physically measured power consumption. The precisions of the instruments used for the physical measurements have been modeled as intervals. We have been able to model the power consumption of the RF device operating at 5MHz using homotopy between 2 continuous power consumptions of the RF device operating at the bandwidths 3MHz and 10MHz.

**Keywords:**
Radio frequency,
high power amplifier,
baseband,
LTE,
power,
emulation,
homotopy,
interval analysis,
Tx power,
register-transfer level.

##### 3287 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.

##### 3286 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.

##### 3285 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

##### 3284 Estimating the Flow Velocity Using Flow Generated Sound

**Authors:**
Saeed Hosseini,
Ali Reza Tahavvor

**Abstract:**

**Keywords:**
Flow generated sound,
sound processing,
speed,
wave power.

##### 3283 Power Flow Tracing Based Reactive Power Ancillary Service (AS) in Restructured Power Market

**Authors:**
M. Susithra,
R. Gnanadass

**Abstract:**

Ancillary services are support services which are essential for humanizing and enhancing the reliability and security of the electric power system. Reactive power ancillary service is one of the important ancillary services in a restructured electricity market which determines the cost of supplying ancillary services and finding of how this cost would change with respect to operating decisions. This paper presents a new formation that can be used to minimize the Independent System Operator (ISO)’s total payment for reactive power ancillary service. The modified power flow tracing algorithm estimates the availability of reserve reactive power for ancillary service. In order to find optimum reactive power dispatch, Biogeography based optimization method (BPO) is proposed. Market Reactive Clearing Price (MRCP) is then estimated and it encourages generator companies (GENCOs) to participate in an ancillary service. Finally, optimal weighting factor and real time utilization factor of reactive power give the minimum ISO’s total payment. The effectiveness of proposed design is verified using IEEE 30 bus system.

**Keywords:**
Biogeography based optimization method,
Power
flow tracing method,
Reactive generation capability curve and
Reactive power ancillary service.

##### 3282 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

##### 3281 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.

##### 3280 Wind Farm Power Performance Verification Using Non-Parametric Statistical Inference

**Authors:**
M. Celeska,
K. Najdenkoski,
V. Dimchev,
V. Stoilkov

**Abstract:**

Accurate determination of wind turbine performance is necessary for economic operation of a wind farm. At present, the procedure to carry out the power performance verification of wind turbines is based on a standard of the International Electrotechnical Commission (IEC). In this paper, nonparametric statistical inference is applied to designing a simple, inexpensive method of verifying the power performance of a wind turbine. A statistical test is explained, examined, and the adequacy is tested over real data. The methods use the information that is collected by the SCADA system (Supervisory Control and Data Acquisition) from the sensors embedded in the wind turbines in order to carry out the power performance verification of a wind farm. The study has used data on the monthly output of wind farm in the Republic of Macedonia, and the time measuring interval was from January 1, 2016, to December 31, 2016. At the end, it is concluded whether the power performance of a wind turbine differed significantly from what would be expected. The results of the implementation of the proposed methods showed that the power performance of the specific wind farm under assessment was acceptable.

**Keywords:**
Canonical correlation analysis,
power curve,
power performance,
wind energy.

##### 3279 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

##### 3278 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.

##### 3277 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.

##### 3276 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.

##### 3275 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.