IJEA - Volume 4 Issue 7 (July 2015)

 


Sr/No/ Title Pdf
1 Content centric and service centric networking
S.Vishali

Abstract-Content-centric networking is a novel paradigm for the Future Internet that treats content as a first class citizen. This paper argues that content-centric networking should be generalized towards a service-centric networking scheme. We propose a service-centric networking design based on an object-oriented approach, in which content and services are considered objects, and discuss opportunities as well as open research issues.

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2 Identity-based Encryption data Storage System in Cloud Computing
K. Prashanth

Abstract:-Now days, more and more users store their important data in cloud. To ensure the security of the remotely stored data, users need to encrypt important data. From the point of data security which has always been important aspect of quality of service, cloud computing cause’s new challenging security threats. Identity-based proxy re-encryption schemes have been proposed to shift the burden of managing numerous files from the owner to a proxy server.

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3 Voltage Sag/Swell and Load Reactive Power Compensations by Utilizing Series Inverter of UPQC
A.V.Prasd, K.Sujesh

Abstract:-A new concept of optimal utilization of a unified power quality conditioner (UPQC). The series inverter of UPQC is controlled to perform simultaneous 1) voltage sag/swell compensation and 2) load reactive power sharing with the shunt inverter. The active power control approach is used to compensate voltage sag/swell and is integrated with theory of power angle control (PAC) of UPQC to coordinate the load reactive power between the two inverters. Since the series inverter simultaneously delivers active and reactive powers, this concept is named as UPQC-S (S for complex power). A detailed mathematical analysis, to extend the PAC approach for UPQC-S, is presented in this paper. MATLAB/SIMULINK-based simulation results are discussed to support the developed concept.

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4 Voltage Sag and Swell Reduction for Power Quality Improvement Using Distributed Power Flow Controller
K. Rakesh chandra, T.Rajasekar

Abstract:-The DPFC is derived from the unified power-flow controller (UPFC). The DPFC can be considered as a UPFC with an eliminated common dc link. The active power exchange between the shunt and series converters, which is through the common dc link in the UPFC, is now through the transmission lines at the third harmonic frequency. The DPFC employs the distributed FACTS (D-FACTS) concept, which is to use multiple small-size single-phase converters instead of the one large size three phase series converter in the UPFC. The DPFC employs the distributed FACTS (D- FACTS) concept, which is to use multiple small-size single-phase converters instead of the one large-size three-phase series converter in the UPFC. Power quality issue is studied. The voltage deviation and improve power quality. In this paper, the capability of DPFC is observed for the transmission line based on PI and fuzzy logic controllers (FLC). On comparing the two controller’s performance, we can say that Fuzzy Logic Controller based DPFC gives better compensation than PI Controller based DPFC. Matlab/Simulink is used to creat the PI and FLC and to simulate DPFC model.

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5 Improve the Power Quality in Interconnected with Stat- Com Control Scheme
S. Sumalatha reddy, D. Vinay kumar

Abstract:-Renewable energy sources are alternative energy source, can bring new challenges when it is connected to the power grid. Generated power from wind energy system is always fluctuating due to the fluctuations in the wind. According to the guidelines specified in IEC-61400 standard (International Electro-technical Commission) provides some norms and measurements. The performance of the wind turbine, power quality is determined. The power quality measurements are-the active power, reactive power, voltage sag, voltage swell, flicker, harmonics, and electrical behavior of switching operation and these are measured according to national/international guidelines. The paper clearly shows the existence of power quality problem due to installation of wind turbine with the grid. In this STATCOM is used with energy storage system (BESS) to reduce the power quality problems. The STATCOM control scheme for the grid connected wind energy generation system to improve the power quality is simulated using MATLAB/SIMULINK in power system block set.

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6 Modeling of Five-Level Inverter for photo voltaic power generation system
M. Vishwanath, CH. Venkatesh

Abstract:-In this paper we proposed better solution for designing five-level inverter by injecting small amount of real power from the renewable power source into the grid to consistently reduce the switching power loss, the harmonic distortion in it, and EMI in power electronic devices caused by switching operation. In order to construct we require 2 dc capacitors, full-bridge inverter, a dual buck converter and filter. Here role of dual-buck converter is to converts 2 dc capacitor voltage sources to a dc output voltage with three levels and that balances these 2 dc capacitor voltages, thus output voltage of dual-buck converter supplies to full-bridge inverter. Finally it is designed to produce output current controlled to generate a sinusoidal current in phase with utility voltage to inject to grid. We also simulated results with Matlab Simulink and studied power decoupling performance.

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7 Improvement of Power Quality in Distribution System with Reduced DSTATCOM Voltage Rating
Shalini sharma, P.Srikanth

Abstract:-In power distribution network, DSTATCOM is used for improving power quality. This paper investigates the application of DSTATCOM with non-stiff source connected to distribution network to enhance power quality. The model discussed in this paper is designed to have reduced DC-link voltage rating without compromising compensation capability when non-linear loads are connected to distribution network. This model uses a series capacitor along with interfacing inductor and a shunt filter capacitor. Having this reduced DClink voltage, the average switching frequency of insulated gate bipolar transistor (IGBT) switches of DSTATCOM reduces and thus reducing switching losses in inverter. Simulation studies are carried out using matlab/simulink and the results shown proves the performance of the system when non-linear loads are connected.

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8 Designing of Switched-Capacitor with Diode Clamped Five Level and Seven Level Converter for Induction Motor
Aravind, T.Rajasekar

Abstract:-The concept of multilevel inverters, introduced few years ago entails performing power conversion in multiple voltage steps to obtain improved power quality, lower switching losses and higher voltage capability. The benefits are especially clear for medium-voltage drives in industrial applications and are being considered for future naval ship propulsion systems. The novel multilevel five level and seven level circuit topologies are proposed in this paper. They are called multilevel circuit topologies based on switched-capacitor and diode-clamped converters (MCT-BSD).

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9 Power Quality Improvement In Pv Systems At Ditribution Load Level
M.Srinath, T.Rajasekar

Abstract:-Electrical utilities and end users of electric power are becoming increasingly concerned about meeting the growing energy demand. Maximum amount of energy demand is supplied by the non-renewable sources, but increasing air pollution, global warming concerns, diminishing fossil fuels and their increasing cost have made it look towards renewable energy sources. This paper presents a grid interfacing inverter that compensates power quality problems and it can also interface renewable energy sources with the electric grid. The grid interfacing inverter can effectively be utilized to perform following functions such as transfer of active power harvested from the renewable resources, load reactive power demand support, current harmonic compensation at PCC and current unbalance and neutral current compensation in case of 3-phase 4-wire system.The convertor} will therefore be used as: 1) power converter to inject power generated from RES to the grid, and 2) shunt APF and L,C Filter to compensate current unbalance, load current harmonics, load reactive power demand and cargo neutral current.

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10 Estimation of Channel Response MIMO OFDM Systems with I/Q Imbalance, CFO
Kunchala ravi

Abstract:-In this paper, we study the joint estimation of in-phase and quadrature-phase (I/Q) imbalance, carrier frequency offset (CFO), and channel response for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems using training sequences. A new concept called channel residual energy (CRE) is introduced.

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11 Elimination of Inrush Current in Load Transformer by Using Series Compensator
K.Sumalatha, K.Sujesh

Abstract:-Inrush currents generated by unloaded power transformer often reduce power quality on the system. To improve the power quality, this paper proposes a series inrush current compensator that is capable of reducing the inrush current effectively during startup mode. The proposed compensator is based on an inverter-based series compensator which is comprised of a single-phase inverter and series transformer. Voltage sags are very frequent events with energization of transformer or starting of large motors although their duration is very short. Hence, during voltage stabilizer mode, the existing series compensator is controlled by a voltage stabilizer controller and superimposes a compensating voltage on the inverter output whenever the load voltage deviate from the nominal value. This strategy is easier to implement because it requires no information of the transformer parameters, power on angle of circuit breaker and measurement of residual flux. Some simulations results show satisfactory performance of the proposed technique on both inrush current reduction and correcting voltage sags.

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12 Fault Current Interruption and Power Quality Improvement by Using the DVR
P.Bhargavi, K.Sujesh

Abstract:-This paper introduces and evaluates an auxiliary control strategy for downstream fault current interruption in a radial distribution line by means of a Dynamic voltage restorer (DVR).The proposed controller supplements the voltage sag compensation control of the DVR. Dynamic voltage restorers (DVR) can provide the most essential solution to reduce the voltage sag by injecting voltage into the system .The Dynamic voltage Restorer (DVR) is fast, flexible and more efficient solution to voltage sag problem The DVR is a series compensator used to mitigate the voltage sags and to restore load voltage to its rated value. In this project, an overview of the DVR and its functions, configurations, components, operating modes, voltage injection methods and closed loop control of the DVR output voltages are reviewed along with the device capabilities and limitations. This project presents modeling, analysis and simulation of Dynamic Voltage Restorer (DVR) in MATLAB SIMULINK. Simulation results are presented to illustrate and understand the performance of the DVR under various fault conditions such as three phases to ground, line to line fault etc. The results showed clearly the performance of the DVR in mitigating voltage sags.

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13 Transformer less Inverter Topology for Cost Effective Photo Voltaic System
V Bhagavan, CH Venkatesh

Abstract:-This paper presents an improved transformer-less inverter with common mode leakage current elimination for a photovoltaic grid connected power system. To eliminate the common-mode leakage current in the transformer less photovoltaic grid-connected system, an improved single-phase inverter topology is presented. The improved transformer less inverter can sustain the same low input voltage as the full-bridge inverter and guarantee to eliminate common-mode leakage current. The inverse sine carrier pulse width modulation (ISPWM) control strategy can be applied to implement the presented inverter. The lower total harmonic distortion and higher fundamental output voltage are obtained by using the inverse sine carrier pulse width modulation (ISPWM). The maximum power point tracking (MPPT) is used to extract the maximum power form PV panel. The simulation result of the proposed topology using MATLAB/SIMULINK is presented.

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14 Power System Stability Enhancement Using Static Synchronous Series Compensator (SSSC)
G.Raghu, P.Srikanth

Abstract:-In this research we are investigate the controlling and enhancing or modulation power flow in a transmission line using a static synchronous series compensator (SSSC). At present studies it include detailed PWM techniques controlled for SSSC, are conducted in control circuits. In this proposed technique we are study a static synchronous series compensator is used to investigate the device in controlling active and reactive power as well as damping power system oscillations in the transient mode. This SSSC DEVICE IS EQUIPPED WITH A SOURCE ENERGY IN TH dc LINK can observe or supply the active and reactive power to or supply the active and reactive power to or from the line. This application has been done in MATLAB/SIMULINK environment. The simulation results are obtained from a selected bus-2 in two machine power system shows and efficiency of this compensator is one of the facts devices as a member in power flow controller to achieve desired value for active, reactive powers and damping oscillations appropriately.

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15 Improve the Power Flow in Transmission System with Neutral Point Diode Clamped Converter by Using Direct Power Control Technique
M.Shankar, K.Sujesh

Abstract:-In this paper three phase neutral point diode clamped converter based UPQC, implemented and direct power control technique is used to control the achieve and reactive power without overshoot or cross coupling and also improve the dynamic performance of the system the Unified power flow control the direct power is valuable control technique. The direct flow control can be used with any topology of voltage source converter. A simulation result of full three phase model confirms minimal control delay, no overshoot or cross coupling. While comparing other controllers we can obtain the better response under balanced and unbalanced conditions.

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16 Loop Power Controllers for Balancing Load Distribution Feeders in Photovoltaic System
K Ragupathi, D Vinay Kumar

Abstract:-The loop power controller is implanting for the active power and reactive power flows by change in voltage ratio and phase shift. Balancing load of distribution feeders is significant for falling of power loss and mitigating power flow. So that the balancing of the load distribution feeders can be achieved. However it can include photovoltaic power producing in feeder balancing load, as a Tai-power distribution feeder consisting of two feeders with large amount of photovoltaic equipment considered. The balancing load can be determine in distribution feeders with photovoltaic set up by using the loop power controllers as the changing of solar energy and power loading of feeders. With implanting the control algorithm in MATLAB for loop power controller by changing the voltage ratio and phase shift connecting to the feeder the proper amount of active power and reactive power can be change from the heavily loading feeder to the lightly loading feeder. When system power loss decreases, Photovoltaic balancing the load for loop power controller has been investigated.

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17 The Coordination Control Algorithms for Multi- Directional Converters in Hybrid Ac/Dc Micro-Grids
Ch.Naresh, P.Srikanth

Abstract:-A hybrid ac/dc micro grid to reduce the processes of multiple dc–ac–dc or ac–dc–ac conversions in an individual ac or dc grid. The hybrid grid consists of both ac and dc networks connected together by multi-bidirectional converters. The proposed model is in such a way that the reliability of power can be maintained during the whole day. This is obtained by connecting a PEM Fuel cell stack in parallel with the PV system. The proposed hybrid grid can operate in grid-tied or autonomous mode. The coordination control algorithms are proposed for smooth power transfer between ac and dc links and for stable system operation under various generation and load conditions. Uncertainty in characteristics of wind speed, solar irradiation level, ambient temperature, and load are also considered in system control and operation. A small hybrid grid has been modeled and simulated using the Simulink in the MATLAB. The simulation results show that the system can maintain stable operation under the proposed coordination control schemes when the grid is switched from one operating condition to another.

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18 Harmonics Elimination in a Grid-Connected Single-Phase PV System
H.Srinivas, P.Srikanth

Abstract:-Single-phase grid-connected photovoltaic (PV) inverter topology consisting of a boost converter section, a low voltage single-phase inverter with an inductive filter, and a step-up transformer interconnected to the grid. this topology will not inject any lower order harmonics into the grid due to highfrequency pulse width modulation operation. However, the non ideal factors in the system such as core saturation-induced distorted magnetizing current of the transformer and the dead time of the inverter, etc., contribute to a significant amount of lower order harmonics in the grid current. An adaptive harmonic compensation technique and its design are proposed for the lower order harmonic compensation. In addition, a proportional-resonant-integral (PRI) controller used. This controller mitigates the dc component in the control system, which introduces even harmonics in the grid current. The dynamics of the system due to the interaction between the PRI controller and the adaptive compensation method is also analyzed. The complete results have been analyzed with MATLAB/SIMULINK.

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19 DTC Control Strategy for Doubly Fed Induction Machine
Kranthi.Govindu, M.Rosaiah

Abstract:-This paper proposes a control strategy of generating a rotor flux amplitude reference for Doubly Fed Induction Machine (DFIM) based wind turbines. In addition to that a Direct Torque Control (DTC) strategy that provides fast dynamic response accompanies the overall control of the wind turbine. It is specially designed to address perturbations, such as voltage dips, keeping controlled the torque of the wind turbine, considerably reducing the stator and rotor over currents during faults. Despite the fact that the proposed control does not totally eliminate the necessity of the typical crowbar protection for this kind of turbines, it eliminates the activation of this protection during low depth voltage dips.

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20 PWM Control of Single-Phase Rectifiers for High Power Application by Using Active Power Decoupling Method
B.Venkat narsaiah, T.Rajasekar

Abstract:-As we know conventionally we can filter ripple power with the help of bulky capacitors and LC filter which yields poor power density, so another way is to employ active power decoupling that uses an active kind of circuitry for directing pulsating power to another type of energy storage element which further reduces dc-link capacitor. In our proposed circuit employs a third leg, smoothing inductor and energy storage capacitor, all these topology provides high storage efficiency and low control bandwidth. When deriving power decoupling scheme pulsating power from ac source and reactive power of smoothing inductors are taken into account. Also here capacitor voltage reference is changed drastically in a closed loop to achieve steady-state performance .We also simulated results with Matlab Simulink and studied power decoupling performance commutated converters is the generation of harmonics and reactive power [1], [2]. Harmonics have a negative effect in the operation of the electrical system and therefore, an increasing attention is paid to their generation and control [3], [4]. In particular, several standards have introduced important and stringent limits to harmonics that can be injected to the power supply [5], [6], [7]. A good estimate of the active and reactive powers. However, there are several applications where energy flow can be reversed during the operation. Examples are: locomotives, downhill conveyors, cranes, etc... In all these applications, the line side converter must be able to deliver energy back to the power supply. Various active powers filter (APF) [2], [8] are then proposed to overcome the shortcomings of passive power decoupling. The basic idea is using an active circuit to divert the ripple power from the dc link to another energy-storage component, which permits much larger fluctuation of the voltage or current, therefore both this component and the dc-link capacitor can be small in size and weight. If a capacitor is selected as the energy storage component, film type capacitors can be used, which have a much longer lifetime than electrolytic ones.

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21 Grid-Connected Single-Phase Seven-Level Inverter for Photovoltaic System
A.Ravi varma, T.Rajasekar

Abstract:-In this a single-phase seven-level inverter for gridconnected photovoltaic systems, with a novel pulse widthmodulated (PWM) control scheme. Three reference signals that are identical to each other with an offset that is equivalent to the amplitude of the triangular carrier signal were used to generate the PWM signals. The inverter is capable of producing seven levels of output-voltage levels (Vdc, 2Vdc/3, Vdc/3, 0, −Vdc, −2Vdc/3, −Vdc/3) from the dc supply voltage. The proposed system was verified through simulation and implemented in a prototype.

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22 Improving Wireless Locality Isolation with Silent Stage
V.Vidhya, G.Jeyaram, K.R.Ishwarya

Abstract:-The application of location-based services (LBS) is improved with the help of the advancement in ISM-band radiobased tracking systems but it also threatens to allow the movement of users to be tracked whenever they are transmitting frames. Periodical address updates based protection methods has been proposed already. However, new correlation attacks can defeat current protection methods. TO overcome this drawback the concept of silent period attack is proposed. A silent period is defined as a transition period between the use of new and old pseudonyms, when a node is not allowed to disclose either the old or the new address. A silent period should contain a constant period and a variable period. The effect of the constant period is to mix the spatial relation between the node’s disappearing points and emerging points. The variable period mixes the temporal relation between the node’s disappearing times and emerging times. Silent period protocol is the first step for us to realize random address in wireless location privacy protection.

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23 Cluster Driven Refinement for Satellite Image Retrieval using improved retrieval techniques
Anushri R. Zanzad, Kiran Bhandari

Abstract:-The increased need of Image retrieval techniques are found in the domain like Satellite Imagery where the large volume of data are generated in various fields like forests, agriculture, disaster management etc. So the effective and efficient retrieval techniques are needed for Satellite Image retrieval. As the volume of Satellite imagery continuous to grow exponentially resulting in the huge database of satellite images, the efficient management of large collection of image database is becoming serious challenge. In order to overcome such problem the Clustering technique is used to manage the large database as the clustering is the powerful tool for analyzing the large volume of data. Therefore this paper provides the effective and efficient retrieval techniques for Satellite Image retrieval along with the clustering of large database for fast retrieval. The proposed system indexes the images into database based on the color and tag and groups them into the set of clusters. Clustering constructs a taxonomy of images based on color as well as tag by forming groups of closely related images. Queries can be performed on color, tag and the combination of both color and tag to improve the accuracy of retrieval results. The experimental results shows that the system adapts the queries into database with features like color, tag, and combination of both which shows the effectiveness of proposed system.

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24 Optimization of Diversified Images by Using Discrete Wavelet Transform
Neha Agrawal, Pradeep tripathi

Abstract:-In the following paper the author has proposed an algorithm based on Discrete Wavelet Transform to enhance the low contrast image. This algorithm is based on thresholding, mean, minimum, maximum and standard deviation only. In this noise is added repeatedly, and also utilize the well known histogram technique of image processing. Easy to implement in any generalized image is an advantage of this proposed algorithm. To verify the utility of this algorithm, this is applied to low contrast standard Lena image and other real life images.

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25 Anti-Product of Multi Anti L-Fuzzy Subgroup of a Group
K.Sunderrajan, M.Suresh, R. Muthuraj

Abstract:-In this paper, we introduce the notion of anti product of multi anti L-fuzzy subgroups of a group G and discuss some of its properties.

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26 Android based secure wireless data communication using Beagle Board Architecture
Vinutha.C.M, Sumarani.K.P, C.V.Ravishankar

Abstract:-This paper describes the design and implementation of android based secure wireless data communication using Beagle Board Architecture Android is the latest technology used in the cell phone today and ARM is the latest 32 bit micro controller in the market today. Main goal of this to work on the principle which uses both of these two different technologies in the single application. Hence preferred to work on this technology.As security is a major concern today in the field of communication, we decided to work on the encryption and the decryption using own concept in the real time environment.

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27 AC-DC Bidirectional Converter by Using SVPWM
Sangani Prasannakumar, S.Sahithi

Abstract:-In recent years, a system that makes use of various types of energy has been sought after and the distributed generation system that uses alternative energy such as vehicle power sources like the uninterrupted power system and hybrid electrical vehicles, fuel cells, solar cells and etc. are being studied actively. In these systems, for the greatest efficiency, the control of the charging and discharging systems to give and take energy between the DC bus and storage equipment’s and the dual voltage system require voltage step-up since the load increase in independent power source systems are essential. Therefore, bidirectional DC/DC converters are required to enable the give and take of energy between the different dc sources and to allow for control using efficient modulation scheme. Due to the limitations of energy sources of these systems, the conversion efficiency is very important. Generally, as a bi-directional coupled Buck-Boost DC/DC converter, in the isolated mode does not reverse the polarity and the current although the switch and diode is smaller than that of other converters. As such the conduction loss is small and the efficiency is high and utilization of SVPWM achieves low switching loss and more flexible to control. But the converter has the problems of current and voltage pulsation at input and output, which is like the shortage of the Buck and boost converter. A high-efficiency isolated bidirectional AC-DC converter for a 380-V dc power distribution system to control bidirectional power flows and to improve its power conversion efficiency is proposed in this work. The dynamic analysis is evaluated by using Matlab/Simulink tool and simulation results are conferred.

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28 A Solar Power Generation System with A Multi-Level Inverter
Vankudoth Manjula, G. Mohan

Abstract:-Multilevel inverters are used extensively now-a- days due to their increased power rating, improving harmonic performance and reduced electromagnetic interference. In this paper, an H-bridge inverter topology with reduced number of switches is proposed which produces same number of levels as that of a conventional cascaded multilevel inverter.

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29 Ocean Shipment and Tracking System for Global Distribution Network Integration
P.Sakthivel, M.Sudhakar, S.Sowndeswari

Abstract:-In a variety of modes of transport, the vessel transport not only occupies an increasingly important position in the international transport system, but also plays an important role in regional economic, trade freight and logistics development with its own superiority. International ocean vessel shipping is a huge investment business and carriers expect more benefits from improving the operational level cargo mix and shipment planning. In this project, we describe the characteristics of the cargo mix and shipment schedule problem with uncertainty in a multi-period planning horizon, and propose a two-stage stochastic mixed integer programming model for the problem. The objective of the model is maximizing the expected profit over the possible decisions under the uncertainty of shipping capacities. A heuristic method is proposed to obtain an approximate optimal solution for the problem. Finally, we give numerical experiments to demonstrate the efficiency.

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