Title: |
Tribological
performance of environment friendly surface modified dies in
deep drawing |
Author (s): |
S. Sivarajan
and R. Padmanabhan |
Abstract: |
The present paper investigates the
characteristics of well deposited surface coating of tool
steel. By the right choice of surface coating processes,
process parameters, coating material and coating properties
like coating thickness and possibly multiple layer
configurations, a mechanically well functioning coating can be
obtained. MoS2 was used as a source material in
thermal evaporation process to deposit a thin film of
Molybdenum of thickness in submicron on high speed steel
substrates and their coating characteristics were analyzed. |
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Title: |
Influence of
cutting parameters on machinability of Inconel 718 alloy with
coated carbide insert- A
Taguchi based
fuzzy logic approach (TFLA) |
Author (s): |
R. Ramanujam, K. Venkatesan, Vimal Saxena, Nilendukar Chawdhury
and VikashChoudhary |
Abstract: |
Inconel 718, a nickel based alloys, has found
in many industries because of their unique combination of
properties such as high strengths at elevated temperatures,
resistance to chemical degradation, and have high wear
resistance. The present work is focused on Taguchi based fuzzy
logic loss function for the optimizing the arithmetic surface
roughness (Ra and Rt) and cutting force
(Fz) in dry turning of Inconel 718. This fuzzy
interface system is used to identify the relationship between
the responses and experimental design in order to determine
the effectiveness each machining parameters in Taguchi’s
design of experiment concept. Machining experiments were
performed at medium duty lathe using PVD AlTiN coated tungsten
carbide cutting tool. Cutting speed, feed rate and depth of
cut were selected as cutting parameters. Taguchi method with
the orthogonal array L9 is applied in this experiment with the
selection of cutting parameter of cutting speed of 30, 50, 70 m/min,
feed rate of 0.103, 0.206, 0.294
mm/rev, and depth of cut of 0.2, 0.3, 0.4
mm. From the fuzzy loss function process, the optimal cutting
conditions for the responses were effectively determined as
v2f1d3. By applying ANOVA, feed rate is the most significant
factor that influences the machining process. |
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Title: |
Numerical
simulation of centrifugal compressor |
Author (s): |
Srinivas G. |
Abstract: |
Design of 3D-centrifugal impeller blades is a
compromise between manufacturability and aerodynamics. The
aerodynamic requirement is that edge velocities along the
impeller channel passage surfaces like hub, shroud, pressure
and suction surfaces vary smoothly without sudden
decelerations, which would otherwise cause flow separation
leading to losses. The paper aims to study several flow
characteristics between blade channels using commercial flow
solver CFX based on finite volume techniques. From the public
domain literature, using the blade data, profiles are
developed, for which multiblock hexahedral computational
meshes are generated. Using the periodic boundaries and
defined flow conditions at inflow / exit flow and blade
rotations, the turbulent viscous flow between blade channels
are computed. The efficiency related parameters using average
quantities, besides flow pattern in terms of velocities,
streamlines and pressure distribution on blade surfaces are
graphically interpreted. An attempt is also made to study the
influence of pressure loads on structural deformations in the
chosen blade profile. This analysis also provides insights
into the locations of maximum principal stresses or equivalent
stresses on blade surfaces. This paper highlights
aero-mechanical features of centrifugal impeller obtained from
several numerical simulations, which are expected to provide a
sound basis for further investigations. |
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Title: |
Encrypting
and decrypting image using computer visualization techniques |
Author (s): |
Gunasekaran G.
and Bimal Kumar Ray |
Abstract: |
Today’s networks are essential to our modern
world, and a thorough understanding of how they act is vital
to their efficient operation. Fortunately, data on networks is
plentiful; by visualizing this network data, it is possible to
greatly improve our understanding and also should provide the
security for network data. The motivation of this paper is on
visualizing the network data associated with a network image
or object that will be send in the format of image at the
sender and at the receiver ends that image or object will be
encrypted in the form of rich text format that will be
decrypted form at the receiver end. The technique sending data
in image format will provide a greatest security for World
Wide Web data transmission on network. We can also visualize
that what data is behind on image and rendering of the image.
Finally, this proposal is trying to encrypt and decrypt image
visualization using computer visualization techniques. |
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|
Title: |
Heat transfer
and fluid flow analysis of flat surface with artificially
roughened square transverse wire rib for application in solar
air heater |
Author (s): |
R. Thundil
Karupaaraj, Y. Raja Sekhar, G. Edison, B. Sai praneeth and
T. Elango |
Abstract: |
Metal duct or channels of rectangular cross
section with black selective coating has an application in
solar air heaters. Increase in heat transfer rate is achieved
by suitably modifying the absorber surface with fins,
corrugations, honey comb structure etc. In the present article
numerical study is performed using computational fluid
dynamics (CFD) on a rectangular metal duct having transverse
square wire rib roughness of small diameter created
artificially on the absorber surface. The design parameters of
the analysis are the flow Reynolds number, hydraulic diameter
roughness pitch and height. The 3D analysis is performed using
ANSYS FLUENT 12.1 code with Renormalization-group (RNG) k-ε
model having the mesh model under five lakh nodes to
investigate the heat transfer and fluid flow characteristics.
The results of smooth duct are compared with results from
literature and found to be in good agreement. The ratio of
increase in heat transfer to friction factor referred as
energy gain ratio with the use of artificial roughness is
estimated for range of parameters and optimum performance
condition is arrived. The maximum value of energy gain ratio
is about 1.31 times more compared to the plain duct for the
range of operating parameters investigated. |
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Title: |
Study of
fluid flow around impeller blades in Rushton turbine in a
baffled vessel using computational fluid dynamics |
Author (s): |
R. Thundil
Karuppa Raj, Aman Deep Singh, Shreyak Tare and Satwik Varma |
Abstract: |
The present study summarizes the design of the
Rushton turbine and simulates the three-dimensional turbulent
flow around the impeller blades of Rushton turbine in a
stirred baffled vessel. The 3-dimensional flow around the
impeller interacts with the baffles as the impeller rotates.
This generates extremely complex flow physics within the
vessel being stirred. The simulations are carried out using
the Multiple Reference Frame (MRF) approach. The 3-dimensional
model of the Rushton turbine and vessel is modeled as per the
literature of Ranade et al. using SolidWorks package.
The Rushton turbine with impellers is discretized into smaller
finite volume domains using ICEM CFD pre-processing tool.
Hexahedral grids are generated through the turbine and the
impellers. The hexahedral cells generated are used to capture
the boundary layer phenomenon more accurately compared to the
tetrahedral cells for the same cell count. The flow physics
involves both stationary and rotating domains and proper
interface is provided between these domains so that the flux
transfer is more uniform. A finite volume CFD code ANSYS CFX
12.1 is used to capture the 3-dimensional flow fields by
solving the continuity, momentum and energy equations using
RANS algorithm. A second order upwind scheme is employed for
better accuracy. Shear Stress Transport (SST) k- ω turbulence
model is used to capture the fluctuating quantities generated
due to the turbulence created. SST k- ω has a blending
function which ranges from 0 to 1 and can act both s as
Standard k-ω and Standard k-ε turbulence models. The flow
field near the walls is captured using Standard k-ω models and
the flow physics at the free stream region is captured using
Standard k-ε model. The numerically predicted results are
compared with the experimental data available in the
literature. Upon validation, the baffled vessel is varied for
different rotational speeds and numerically analysis is
carried out. The radial velocity contours and streamlines
along with the turbulent kinetic energy are presented at the
mid plane of the turbine rotational speeds. The effect of
baffles is studied with respect to the flow optimization
thereby increasing the reliability and life time of the
Rushton turbine. |
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Title: |
Trends in
manufacturing and assembly technologies for next generation
combat aircraft |
Author (s): |
H. Balaji, P. Selvaraj and V. Subba Rao |
Abstract: |
This paper covers the status on present
manufacturing and assembly techniques and trends in new
manufacturing technologies for the development of future
combat aircraft. Aircraft building involves lot of challenges
right from a detail component stage to the sub-assembly and
assembly stage because of the complexity involved in the
design and manufacturing of aerodynamic contour with weight
control. The objective of this paper is to highlight the next
generation manufacturing technologies which simplify the
present production processes, improves the production rate and
build quality. Advanced Manufacturing techniques like CNC pipe
bending for aircraft system pipelines, multi-pass Wire-EDM for
cut-out brackets and actuator components, Composite CNC
machining for CFC panels, Multi-tasking machines for
integrated machining of aircraft system parts, High speed
machining to machine lengthy spars, etc., need to be adopted
for series production. The various assembly techniques like
modular assembly, manufacturing automation viz. Robotic arm
for drilling, riveting, painting, inspection, etc., ensures
repeatability and improved quality in series production. This
paper brings out the emerging trends in manufacturing and
assembly of next generation combat aircraft and the benefits
derived in terms of cycle time and quality. |
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|
Title: |
Numerical
simulation of heat transfer characteristics in the absorber tube
of parabolic trough collector with internal flow obstructions |
Author (s): |
M. Natarajan,
R. Thundil Karuppa Raj, Y. Raja Sekhar, T. Srinivas and Pranay Gupta |
Abstract: |
Absorber tube performance enhancement by using
passive techniques is one of the major topics of research in
the field of solar thermal power engineering. Earlier studies
on ducts revealed that passive augmentation techniques have
shown considerable enhancement in heat transfer. Experiments
were conducted earlier on Parabolic Trough Collector (PTC)
with plain absorber tube without inserts for different flow
rate conditions. It was observed that fluid flow rate with 85
kg/hr has shown higher temperature difference for solar flux
condition of 850 W/m2. In the present study,
numerical analysis using CFD is performed by using inserts of
different cross-section inside the fluid flow path of an
absorber tube to study the flow characteristics. The fluid
flow and heat transfer phenomena through a 3-dimensional
absorber tube with varying heat source are obtained by solving
the fundamental governing equations namely: conservation of
mass, momentum and energy. Turbulence is modeled using SST k-ω
model of closure. The heat transfer and pressure drop is
calculated from the studies conducted for a mass flow rate of
85 kg/hr using the ANSYS CFX 12.1 software. The result of the
numerical analysis is validated with the experiments carried
out with the parabolic trough collector. The numerical study
is carried out with triangle, inverted triangle and
semi-circular inserts and compared with that of plain absorber
tube. It has been found that triangle insertion gives
optimized results with respect to uniform heat transfer which
reduces the thermal fatigue even the pressure drop is
relatively high compared to the plain absorber tube without
insertion. |
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Title: |
Design,
development, simulation and realization of expansion joints in
ECS engine bleed system for a typical light transport aircraft |
Author (s): |
H. T. Akshatha,
A. Rinku, M. L. Shankar and Prashanth Banakara |
Abstract: |
In a
commercial aircraft, ventilation to the cabin is normally
through environmental control system
normal
bleed air system, ECS emergency back-up pressurization system
and ram air. Bleed air is primarily used to provide
pressurization by
supplying air to the environmental
control system.
Additionally, bleed air is used for de-icing of aircraft leading
edges.
The bleed air needs to be tapped from engine and conveyed to
the ECS pack through pipe routings.
The bleed air pipes that
tap the air from engine would experience a varying pressure
load (as high as 140psi) and varying temperature (as high as
340°C) at different segments. This would obviously produce the
expansion/ contraction of pipes which will result in axial
moment and swaying of pipelines from their nominal
configuration. These movements should be compensated by means
of providing suitable expansion joints/thermal compensators to
avoid undesirable loads at the support points which may affect
the overall functioning of the system.
The real
challenge lies in designing such a complex system where
suitable expansion joints need to be provided within
stipulated airframe configuration satisfying the installation
requirements, yet cost and weight effective.
In the present work, a methodology has been developed
for design of ECS pipe routings, using flexible hose- metallic
bellows as a thermal compensator, with the aid of finite
element analysis. This paper also talks about the
qualification of the bellows through acceptance tests and
implementation on a typical light transport aircraft. |
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Title: |
Processing
and characterization of natural fiber-lycra composite reinforced
with epoxy resin |
Author (s): |
Gaurav S. Harane and K. Annamalai |
Abstract: |
As the name suggests composite material are
formed by combining two or more constituents at macroscopic
level. Fiber reinforced polymer composites have acquired a
dominant place in variety of applications because of their
high specific strength and modulus. The fiber which serves as
reinforcement may be synthetic or natural; while matrix
material binds the fibers together can be thermoset or
thermoplastic resins. The use of synthetic fibers (glass,
aramid, boron etc.) in composites tends to affect environment,
on the other hand natural fibers (Coir, jute, flax etc.) are
environmentally superior to synthetic fibers. The present work
includes the processing and characterization of natural fibers
with small percentage of cotton-lycra and epoxy resin (thermoset
resin). Cotton knitted fabric with 5% lycra was used along
with natural fiber to obtain certain elastic property.
Compression molding technique was used for composite
manufacturing. Natural composites have wide variety of
applications from automobile industry to sporting goods
industry, production conveyer systems & also in strong
infrastructure for roads, airport etc. A comparison was
carried out between the properties of jute, jute-lycra and
jute-coir-lycra composites. |
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|
Title: |
An order
level inventory model for a deteriorating item with quadratic
time-varying demand, shortage and partial backlogging |
Author (s): |
Swapan Kumar
Manna and Kripasindhu Chaudhuri |
Abstract: |
An Economic Order Quantity (EOQ) model is
developed for a deteriorating item having time-dependent
demand and shortage. The deterioration rate is assumed to rise
linearly with time and time-varying demand rate is taken to be
a quadratic function of time. Shortages are also assumed to be
partially backlogged. The model is first developed and solved
analytically and then the results are illustrated with
numerical examples. Justifications for considering a
time-quadratic demand are discussed elaborately. |
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Title: |
Tensile and
creep data of 316 L(n) stainless steel analysis |
Author (s): |
V. Bindu Neeharika, K. S. Narayana,
V. Krishna and M. Prasanth Kumar |
Abstract: |
The design of
Liquid Metal Fast Breeder Reactor systems (LMFBR) requires
consideration of elevated-temperature, time-dependent
deformation, since many components will be operating at
temperatures in the creep range of the materials of
construction. Therefore a suitable method of establishing the
stress-strain-time-temperature relationships for these
materials is necessary for use in the design of such high
temperature components. Although 316 L(N) Stainless Steel is
specified by ASME nitrogen in range of 0.1 to 0.16 Wt.%, for
Prototype Fast Breeder Reactor (PFBR), nitrogen content is
limited to 0.08 Wt. %, in view of improved weld ability, code
data availability and for minimizing scatter mechanical
properties. For high temperature components operating in creep
Range 316L (N) has been favored. Other major advantages of
austenitic stainless steel 316L (N) include existence of vast
data on mechanical properties including very long term creep
data, ease of availability and fabrication above all the
availability of design data in the ASME code selected for PFBR
design. |
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|
Title: |
Foldable
bicycle: Evaluation of existing design and novel design
proposals |
Author (s): |
Arunachalam M.,
Arun Prakash R.
and Rajesh R. |
Abstract: |
The Currently available Foldable bicycles in
the Indian market are made up of heavy materials which make
them difficult to carry. The prices of the bicycles are also
generally not affordable to the common man. Many of them are
not foldable in a configurable geometrical order, because of
which their transportation becomes very difficult. It also
leads to a lot of difficulty, when it is to be stored for
future use. This paper aims at evaluating the existing
foldable bicycles in the Indian market and proposing a compact
foldable bicycle which is weightless and overcomes all the
limitations in the currently available bicycles in the Indian
market. The proposed bicycle is designed in such a way that it
is foldable by providing fasteners at the joints. The design
structure imparts stable bicycle geometry. This system meets
different topography and environmental conditions which are
not met by the existing foldable bicycles. |
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Title: |
Experimental
and numerical analysis of modal properties for automotive fuel
tank |
Author (s): |
T. Sethuram, R. Rajamani, K.
Prakasan |
Abstract: |
A fuel tank is the one of the
important parts in automotive fuel system that stores liquid
fuel and provides space for integrating fuel pump, filter,
regulator and gauge inside the tank. The dynamic
characteristics of fuel tank are affected by the mass of
liquid and other fluid - structure interactions. Therefore,
knowledge of the effects of different parameters on modal
properties is very important to design the fuel tank and
integrate fuel system components inside the fuel tank. This
work addresses the vibration characteristics of an automotive
fuel tank under empty and fluid-structure coupling conditions.
The finite element model for vibration analysis of the fuel
tank is developed using ANSYS software and the modal
parameters, namely the natural frequencies and mode shapes are
predicted. Experimental setup is developed using
accelerometer interfaced with data acquisition card. The
frequency responses of the fuel tank are analyzed using
LabVIEW software. The experiments are carried out for
different fill levels of the tank. The findings show that the
level of liquid influences greatly the dynamic characteristics
of the tank. The results obtained from the numerical
simulations are compared with experimental data and good
agreements are observed. |
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Title: |
Part
localization for CNC machining using discrete
point set
approach |
Author (s): |
M. Chandranath,
Raghavendra, R. Suresh and S. Ravishankar |
Abstract: |
Machining of components on CNC machining
centres without any datum reference or tooling hole details is
a challenge and requires mapping of the CAD reference system
with the CNC Machine reference system. Applying best fit
alignment approach to position and orient CNC coordinate
system for parts with free-form features is a subject that can
be widely employed for machining of components in automobile
and aircraft industry. The localization of part and fixing the
coordinate system needs 3D point data set obtained from the
CNC machining centre using a touch signal probe. This paper
focuses on establishing the CNC coordinate system for
machining of components with 3D free form surface whose datum
coordinate system cannot be established because of the non
availability of planar and straight surfaces for reference.
The method adopted in this paper helps in accurately machining
of such parts without the usage of any special fixtures. The
research work aims to report some strategies that provide
guidelines to select appropriate best fit techniques for
achieving the machining quality in the shortest time. The best
fit method adopted on CAD models for fixing of CNC Coordinate
system is done using CATIA software. A shorter surface mapping
time and better fitting results can be achieved by adopting
the recommended techniques. |
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|
Title: |
Influence of
peripheral milling on machining of aircraft grade aluminum alloy |
Author (s): |
Gopinath L. and Ravi Shankar S. |
Abstract: |
Peripheral milling is a metal cutting operation
in which the cutter produces a machined surface parallel to
the axis of rotation of cutting. This is approached either by
upmilling or downmilling methods. The fundamental difference
among these modes of milling shows a marked variation in the
magnitude of cutting forces during the process, chip formation
and the quality of metal cutting. This work examines the
difference brought out on the resultant component/part in
terms of surface finish and hardness on aircraft grade
precipitation hardenable Aluminum 2124 T851 alloy. Other
cutting parameters like feed rate, depth of cut, spindle
speed, tool over hang length, tool diameter, number of flutes
etc., are maintained identical on both types of milling. This
study is examined on finishing operation of Aluminum plates of
the considered aspect ratio in attaining a defined thickness
on all the specimens. Metal cutting is carried using three
different types of cutters for both upmilling and down milling
strategies. The surface texture, surface finish and hardness
are evaluated and the results are presented. The results
indicate that hardness values are relatively high in down
milling strategy for the same machining variables as against
the case of upmilling and the surface roughness is higher in
case of down milling compared to upmilling operations. |
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|
Title: |
Study of bend
angle allowance for sheet metal forming in aerospace industry |
Author (s): |
S.
Raghavendra Rao, S.R.S. Manyam Kothapalli and S. Ravishankar |
Abstract: |
Sheet metal forming is one of the major forming
processes adopted for manufacturing thin walled components
(thickness < 3mm) in aerospace and automotive industry. The
final form and dimensions of the sheet metal components are
affected by several factors such as material characteristics,
thickness, bend radius, flange length, spring back, etc. Among
these, spring back is considered to be the major factor
affecting the bend angle on the component. Thus, to achieve
the nominal bend angle, it is necessary to predict the bend
angle on the form tool with due consideration given to spring
back. This work proposes a relation for the bend angle on the
form tool with respect to the nominal bend angle on the
component for a given sheet thickness and material. The
relation was verified for Al2024 alloy sheet metal components
of thickness ranging between 1-2mm, and the results were found
to be very encouraging. |
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|
Title: |
In situ
deposition of silver micro and nano particles on polyester
fibers by aqueous impregnation |
Author (s): |
Alexander
Wille and Hugo Zea |
Abstract: |
The economical and technically simple
impregnation process of aqueous solutions under different
conditions of concentration, temperature and pressure was
tested in this study for the In situ deposition of silver
micro and nano particles on polyester fibers, commercial
samples of polyester fiber were characterized by means of
optical and electron transmission microscopy and X-Ray
diffraction. |
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|
Title: |
Rate-Transient analysis for hydraulically fractured vertical oil
and gas wells |
Author (s): |
Freddy
Humberto Escobar, Jhon Richard Castro and Juan Sebastian
Mosquera |
Abstract: |
Several common reservoir
production conditions result in flow at a constant pressure;
then, a constantly changing well-flowing pressure is recorded.
Nowadays, most well-test analysis methods assume constant-rate
production especially since gas shale wells are normally
tested by recording the flow rate values under constant
pressure conditions. In such cases, well testing could be
eliminated in many cases as being of little value or
economically unjustifiable because of the resulting production
loss when compared with what can be obtained from constant
wellbore pressure production data. Then, this paper presents a
transient-rate analysis for artificially fractured vertical
wells flowing under constant pressure in homogenous deposits
with circular/square shape. Expressions for reservoir
characterization using both TDS and conventional
techniques are introduced and successfully tested with field
and synthetic examples. |
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|
Title: |
Electrochemical assessment of concrete ternary inhibitors used
in retarding corrosion of steel reinforcement |
Author (s): |
Abdulrahman
A. S. and Mohammad Ismail |
Abstract: |
Corrosion of steel reinforcement in concrete is
generally considered as an electrochemical process which
reduces the service life of a structure exposed to chloride
ions attack. Therefore, laboratory experiments were performed
in order to ascertain the effectiveness and sustainability of
ternary inhibitors (calcium nitrite, ethanolamine and
eco-friendly green Bambusa Arundinacea) in protecting steel
reinforcement in concrete from corrosion attack due to
chloride. Concrete mix was designed to be 30MPa with 0.45 and
0.65 W/C ratios. Inhibitors additions were 2% and 4% by weight
of cement. The specimens were subjected to various durability
corrosion test (using; electrochemical impedance spectroscopy
(EIS)) for 360 days. The results showed that Bambusa
arundinacea has exhibited lowest corrosion rate, highest
concrete resistance and highest polarization resistance (Rp)
values for the period of exposure, compared to calcium nitrite
and ethanolamine. Bambusa arundinacea may be considered a
better substitute for nitrite and amine- based corrosion
inhibiting admixtures for durable concrete structures due to
its viability, versatility and eco-friendliness. |
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|
Title: |
Urzhumian
stage in geochemical variations |
Author (s): |
Nurgalieva N. G., Khaziev R. R.,
Gareev B. I. and Batalin G. A. |
Abstract: |
Geological site Cheremushka is known as key
stratigraphic record of Urzhumian stage of Middle Permian (Biarmian)
series. It is situated on the Volga River’s right bank, near
Kazan city (Russia). In present paper lithology and
geochemistry of this section is analyzed by EDXRF and
discussed to reveal regional facial and cyclic features of the
succession formed in altered sedimentary environments. Bulk
geochemistry of sediments can be used to characterize the
distribution of allogenic and authigenic components. It can
also be used to compare these distributions with the general
evolutionary stages of Volga River’s region. The sedimentary
sequence at site Cheremushka is divided into nine geochemical
stages and sedimentary cycles using bulk geochemistry
profiles, where silica change is considered as basic. The
stage (cycles) boundaries correlate with the significant
lithologic boundaries. Paleoenvironmental evolution is
interpreted as alteration of lagoon and terrigenous flux
influenced environments in arid climate during Sulitzkian time
and in humid climate during Isheevskian time. |
|
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|
Title: |
An efficient
fuzzy weighted association rule mining with enhanced hits
algorithm |
Author (s): |
V. Vidya |
Abstract: |
Association rule mainly focuses on large
transactional databases. In association rule mining all items
are considered with equal weightage. But it is not suitable
for all datasets. The weight should be considered based on the
importance of the item. In our previous work HITS algorithm
(Hyperlink Induced Topic Search) is used to find the weight of
an item w-support is calculated for generating frequent item
sets. In this work enhanced HITS is used to calculate the
weightage of the items. The enhanced HITS update the weight
value in online manner. Fuzzy logic approach is applied to
improve the association rule mining. So the proposed fuzzy
weighted association rule mining with enhanced HITS satisfies
downward closure property which decreases computation time;
uninteresting rules can be pruned because of assigning weights
to items, which also reduce the execution time. This paper
introduces enhanced HITS algorithm and compute weights to
describe the importance of attribute with respect to users
intuition and integrate the options into mining weighted fuzzy
association rule algorithm. Most weighted association rule
mining eliminates extra steps during rules generation.
Experiments show that the proposed algorithm is capable of
discovering new rules in an effective manner by obtaining high
confidence results. The comparison between fuzzy weighted
association rule mining with enhanced HITS and weighted
association rule mining with enhanced HITS is experimentally
evaluated with food mart dataset as shown in enhanced version
outperforms the weighted association rule mining with enhanced
HITS. |
|
|
|
Title: |
Improving product classification
through product family segregation |
Author (s): |
J. O. Mahmud,
M. S. Mohd Ismail and
J. Mohd Taib |
Abstract: |
Information sources are invaluable when taking
decisions in Product design especially at the front end of the
design process. Product families as classified, the
connectivity of product form and interaction of the features
assist the designer in taking good decisions. This paper
addresses product classification from the design perspective
with respect to Product family as reflected by the product
presence in the market. Ten different models for a product
(Wheelchair) was randomly selected and recorded. The choice of
the product has no specific implication other than to
demonstrate the practicability of this approach. TRIZ
principles were employed to perform 3-level component
segregation on each model. A matrix is thereafter drawn for
the product family. The models are recorded on the horizontal
axis of the matrix while their corresponding features are
recorded on the vertical axis. The frequencies of the models
and corresponding features are noted on the right hand right.
The frequencies were then taken through cluster analysis using
the dendrogram on SPSS 20. The result shows the features
categorized into three groups which reveals the commonality
and association of the features that are Basic, Performance
or Luxury according to customers’ satisfaction. This
approach also shows a quick method that can ease product
design decision making because it is systematic and can be
used to dissect and analyze products within a product family.
This approach can lead to functional analysis, product design
specification preparation and product development. |
|
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|
Title: |
A behavioural
model to evaluate the delay on urban traffic flows and analysis
of environmental implications |
Author (s): |
Ferdinando
Corriere |
Abstract: |
In this paper the problem of a road's capacity
in presence of perturbations in the vehicular flow is dealt.
In particular, among the different causes of delay, is here
considered the presence of vehicles parked along the road in
relation at their parking activity. Preliminarily is evaluated
the delay, caused by each vehicle that leaves its parking
position and enters in the traffic flow or by that who slows
down the flow to enter in the parking, by introducing these
effects in the equations of flow, it is possible to evaluate
the modifications that the same curves of down flow suffer.
Consequently, it is also possible to evaluate the increase of
pollutant emissions. |
|
|
|
Title: |
Enhanced
wavelet based approach for defect detection in fabric images |
Author (s): |
Anitha S. and
V. Radha |
Abstract: |
Fabric defect detection
is one of
the indispensable
units in the manufacturing industry to maintain the quality of
the end product. Wavelet transform is well suited for quality
inspection application due to its multi-resolution
representation and to extract fabric features. This paper
presents the comparison of three wavelet based models. These
models include Tree structured wavelet transform, wavelet
transform with vector quantized principal component analysis
and Gabor wavelet network. The wavelet based models are
combined with golden image subtraction to identify the fabric
defect. The energy and entropy features are extracted and
thresholding is performed to produce the binary image. The
performance of the models is evaluated to verify the detection
rate based on the segmented results. It can be concluded that
the Wavelet transform with vector quantized principal
component analysis provides better detection result. |
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Title: |
Design and implementation of
control of level and flow using fuzzy logic for the intelligent
control laboratory of the Surcolombiana University |
Author (s): |
Agustín Soto
O., Luz Adriana Guzmán T. and Y. Oscar Mauricio Calvache G. |
Abstract: |
This work presents the design and
implementation of a multivariable control for a hydraulic
system. The work consists of two control variables common in
the industry: Level and Flow, which are monitored in the main
tank of the system. The development is made from the control
algorithm performed by fuzzy logic on the microcontroller
MC68HC912B32 Motorola instructions supporting this technique.
It monitors the behavior of the variables wirelessly through
the program developed in LabVIEW software for viewing on your
computer. Previously recommended tests are made by
manufacturers of engineered equipment and know their
characteristics and the device used as the electronics, in
order to achieve good performance of the plant and controller
together. Finally, an analysis in terms of its operation and
is obtained as a result the plant hydraulic laboratory
practice for Intelligent Control of the course, physically and
electronically structured monitoring of the variables
corresponding to control, simplicity in the management
presenting to can be used by teachers and students in the
laboratory of Electronic Engineering program. |
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Title: |
KERS
applications to aerospace diesel propulsion |
Author (s): |
Luca
Piancastelli, Leonardo Frizziero and Eugenio Pezzuti |
Abstract: |
Surprisingly, the safety of a flight is still
not guaranteed to maximum steam ejection of power during
take-off. Moreover, modern aircraft require significant
amounts of electricity. It could also be argued that today in
many respects the automotive industry appears to be a
technology leader with respect to the aerospace industry that,
instead, is more conservative. Ferrari has developed, and
implemented, on their F1 cars, an electronic device, called
KERS, which is able to produce electricity, with peaks of 60
KW for 7s, with a mass of 20 kg, including rechargeable
batteries. The main goal of this paper is to explore
utilization of turbo-charged aerodiesel engines and conduct
feasibility study of the F1-derived KERS to assist power
generation in normal and critical flight phases. The KERS’
reversible brushless electric motor works as a generator for
all aircraft power needs and also provides starting power. It
is demonstrated here that such design philosophy improves
performance and flight safety of light-to-medium airplanes and
helicopter. |
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Title: |
Designing a rule based fuzzy
expert controller for early detection and diagnosis of diabetes |
Author (s): |
S. Krishna
Anand, A. Ajmal Ahamed and K. M. Nandhini |
Abstract: |
It can be easily inferred that improvement in
Technology has grown manifold over the years. A large variety
of applications have become more compact and concise. Medical
field is no exception. However, success rate in medical field
has still not reached acceptable limits. The work carried out
aims at providing necessary support and assistance to the
doctor in getting reliable results. Four specific diseases
have been taken into consideration, namely heart disease,
kidney disease, diabetic retinopathy and joint disease. A wide
variety of parameters have been taken into consideration. A
fuzzy expert system has been designed to identify the
relationships based on patient’s data. This system is in turn
used to identify mechanisms for effective disease support
application. |
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Title: |
Techniques to
improve the performance while reducing the pollutants level in
the exhaust gases of compression ignition engines- A review |
Author (s): |
Srinivasa Rao
M. and Anand R. B. |
Abstract: |
This paper describes the various techniques to
improve the performance of compression ignition engines while
reducing the level of pollutants in the exhaust gases. The
pollutants emitted from diesel engine have been recognized as
a major air pollution source, which affects the health of
living beings and causing ozone layer depletion, green house
effect, acid rain and unfavourable ecological environment. In
this paper various technical aspects regarding the diesel
engine performance improvement, combustion characteristics,
methods to control the emission characteristics by modifying
technical parameters like fuel injection pressure and timing,
compression ratio, thermal barrier coating, fuel modification
(blending of nano and chemical additives) and exhaust gas
treatment techniques have been discussed in detail. |
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