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Volume 5 Issue 9 (September 2018)

S.No. Title & Authors Page No View
1

Title : Eradication of hurdles in dynamic structure of Routing protocols of ad hoc networks

Authors : Mohammad al Ansari

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Abstract :

In this research on computer networks, we will find solutions to address defects through routing protocols and to ensure the movement of computer networks. We will need high-quality attacks and types of transactions. These are the roles of routing. Routing protocol protocols on data networks on official rule groups. Between routers such as access and the time when the data meets the specified QoS requirements. The formation and operation of laptop networks is carried out by organizing the steering issues that are related to scientists' work on modern, large-scale computer networks. This guidance is the typical multi-level guidance that divides computer networks into subnets (routing bands) . with at the most efficient protocol subnets group IGP, EGP group and protocols between networks. Most of the known methods and routing protocols in mobile networks are designed for networks with homogeneous (flat) structure (protocols DSDV, WRP) or on a network with fixed structure domains (protocols CBRP, CGSR,), which is not effective for large mobile networks dimension. Constant movement of mobile computer network leads to a change in its topology, composition and number of routing domains that affect the efficiency of routing procedures.  Need in the design and analysis of new intelligent routing protocols that ensure the transfer of data with parameters of quality of service with a minimum volume of service traffic regardless of network reconfiguration. Methods of the mobile computer networks of large dimension, is relevant is a scientific. Network infrastructure in terms of time and volume of service routing traffic required to update routing information.  Development of a distributed multi-mode routing through the use of agent technology that provides the minimum amount of service traffic in mobile networks of large dimension by self-organization of network structure. Development of methods of organizing over subnet routing agents, which has the most stable structure, provides the minimum amount of service traffic at network reconfiguration.  Develop ways to determine the location of agents routing optimal in terms of volume of service (route) information transferred in the networks of large dimension, which is dynamically reconfigurable. Development of algorithm of dynamic reconfiguration and routing domains based on agent technology in mobile computer networks of large dimension. The process of routing in mobile computer networks of large dimension developing the mathematical model of the routing procedure used methods of integer and dynamic programming. Network infrastructure in terms of time and volume of service routing traffic required to update routing information. Development of a distributed multi-mode routing through the use of agent technology that provides the minimum amount of service traffic in mobile networks of large dimension by self-organization of network structure.. Development of methods of organizing over subnet routing agents, which has the most stable structure and provides the minimum amount of service traffic at network reconfiguration.. Develop ways to determine the location of agents routing optimal in terms of volume of service (route) information transferred in the networks of large dimension, which is dynamically reconfigurable.. Development of algorithm of dynamic reconfiguration and routing domains based on agent technology in mobile computer networks of large dimension.  The process of routing in mobile computer networks of large dimension.  Developing the mathematical model of the routing procedure used methods of integer and dynamic programming.

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2

Title : Experimental Study on the Motion Response and Mooring Characteristics of a New Type Deep-draft Multi-column FDPSO

Authors : Xuncheng Tu, Xianghong Huang, Chunyang Zhao

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Abstract :

Considering the effect of wave period, wave height and wave angle, an experimental study for the motion response and mooring characteristics of a new type deep-draft multi-column FDPSO in 1500m operation water depth, was conducted in State Key Laboratory of Ocean Engineering(SKLOE)of Shanghai Jiaotong University. Taking account of water depth limitation of the deep-draft offshore basin and arrangement characteristics of mooring system, a 300m equivalent water depth truncated mooring system was designed. The results show that the FDPSO’s 6-DOFs motion responses except yaw present sinusoidal variation under exci-tation of regular waves, as well as the response of mooring lines’ tension. The wave angle has a relatively small effect on surge, pitch and heave, while sway and roll are sensitive to the change of wave angle, and yaw of the platform is very weak. At the same time, the tension of mooring lines increases with the improvement of sea condition, while the distribution of mooring lines under maximum tension is closely connected with wave angle. The mooring system strength satisfies the design requirements after verification.

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3

Title : Long-Term Activated Sludge Treatment in MBR for Industrial Wastewater Treatment

Authors : AL-Saadi Anmar Joudah, Gabriel Racoviteanu

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Abstract :

Membrane bioreactor (MBR) has been proven as an efficient single step process to treat industrial wastewater and produces a very good effluents quality suitable for reuse. Whereas, it is relatively simple to combine activated sludge with a membrane separation step. MBRs were based on pressurized modules in recirculation loops, but the current state involves submerged membranes functioning by low vacuum. The long-term aeration was adopted in order to obtain the highest efficiency in the biological treatment, wherein the aeration periods were ranged between 07-71 hours. The efficiency of the technology but also of the long-term activated sludge was assessed in combination with sodium hypochlorite addition to remove the adherent bacteria on the surface area of membranes to prevent the clogging. The results showed that there was a significant reduction in both COD and BOD5. As for the total suspended solids, there was fluctuation in concentrations while for nitrate and ammonium concentrations, they were gradual decrease over time, but NaOCl had a negative effect on these concentrations, where the concentrations of effluents were found to be higher than the influent. For phosphates and orthophosphates, there was a gradual increase over time. However, NaOCl had a positive effect on the removal efficiency, where removal ratio increased with the increase in NaOCl, and the highest removal efficiency of total phosphate was 56.44% while, the highest removal efficiency of orthophosphate was 55.54 %.

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4

Title : Effect of Parameter Variation of Viscoplastic Sea Ice Material Model on Ship Ice Collision

Authors : Lin Wang, Xiaogang Qian, Shuaishuai Zhu

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Abstract :

In this paper, the nonlinear finite element method is used to select the viscoplastic ice material model to simulate the ship ice collision. The dynamic structural response characteristics of sea ice collisions under different parameters such as different density and elastic modulus are studied respectively. The collision energy absorption law and collision force under different working conditions are revealed. The ice constitutive model under different parameters is obtained. The mechanism of the impact on ship ice collision is to provide reference for improving the ship's anti-ice load design.

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5

Title : Study on Contact Response Between Underwater and Silt Collision of Titanium Alloy Cylindrical Pressure-Resistant Structure

Authors : Lin Wang, Shuaishuai Zhu, Xiaogang Qian

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Abstract :

Be aimed at the speciality and complexity of the submersible collision problem, based on the nonlinear finite element method and considering the influence of structural contact and friction during contact collision and the additional water quality of submerged underwater collision, A simulation model for the contact collision between cylindrical pressure-resistant structure and silt is established. The speed, acceleration, maximum stress/strain and impact depth of the pressure shell are analyzed by comparison of four working conditions. The results show that the nonlinear finite element method can accurately analyze the submerged contact collision process.

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6

Title : A preliminary optimization study of a SWATH-USV

Authors : Baojiang Wang, Yan Shi, Songling Yang, Shasha Gao, Zhiwei Cao

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In this paper, we designed a kind of Swath-USV through corresponding ship hull parameters selected as design variables to identify the USV performance (Buoyancy, Stability, Rapidity, Maneuverability, And Sea-Keeping) as the comprehensive optimization objective function. First, we selected the range of design variables and constraint conditions, established the comprehensive optimization mathematical model of the ship hull and constructed the optimization methods. Then, we applied a multi-objective optimization design and analysis software for optimal comprehensive performance and took place a set of comprehensive optimization calculations. In the calculation process, Genetic algorithm was selected as the core algorithm to record the best five individual information, and then the second calculation was conducted in combination with itself and other algorithms. By comparing the fitness function values of the hybrid algorithms of discrete genetic iterations, it was found that the genetic plus chaos algorithm of 4000 generations has strong robustness, high optimization ability and less short running time. The second is genetic plus compound algorithm. Finally, the optimal ship hull parameters for the integrated performance of small waterline catamaran were generated. The research results can provide references for the comprehensive optimization of multi-objective, multi-variable and multi-constraint conditions of the performance optimization of small waterline catamaran.

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7

Title : Deformation monitoring of structural elements using terrestrial laser scanner

Authors : Zaki M. Zeidan, Ashraf A. Beshr, Ashraf G. shehata

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Abstract :

Civil infrastructure systems is important in terms of both safety and serviceability. So, large structure have been monitored using surveying techniques, while fine-scale monitoring of structural components has been done with geotechnical instrumentation. The advantages and disadvantages of using remote sensing methods, such as terrestrial laser scanning and digital close range photogrammetry, for the purposes of precise 3D reconstruction and the estimation of deflections in structural elements. This paper investigate that terrestrial laser scanner can be used for the monitoring of concrete beams subjected to different loading conditions. The system used does not require any physical targets. The setup was tested, and the beam deflections resulted from the 3D model from terrestrial laser scanner system were compared to the ones from ANSYS program. The experiments proved that it was possible to detect sub-millimeter level deformations given the used equipment and the geometry of the setup. Calculations and analysis of results are presented.

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8

Title : Research on a Pitching Movement Mode of A Water Surface Monitoring Catamaran Unmanned Craft

Authors : Yan Shi , Baojiang Wang, Songling Yang, Shasha Gao, Tianming Hu

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Abstract :

In this paper,a water surface monitoring catamaran unmanned craft was taken as the research object,and a series of static water pitch attenuation tests were carried out under different drafts and different initial pitch angles.According to the principle of dynamic balance in the pitching motion, the identification mathematical models of four pitch motion modes are established by changing the composition of restoring torque.Based on the theory of system identification  and the idea of genetic algorithm, the software of system identification is programmed with C# language.A better mathematical model and equation of motion are identified through the identification of test data.Using the equation of motion for forecasting,the relative errors between the predicted values and the experimental values are in good agreement, which proves the feasibility and reliability of the system identification method.Finally, the processed data is analyzed and the relevant hydrodynamic coefficient curve is given. The variation law of each moment coefficient affecting the pitching motion with the draft and the initial pitch angle is analyzed.The ship's pitching motion is characterized by nonlinearity. Under the disturbance of navigation conditions and environment, its dynamic characteristics will produce uncertainty. If it can be accurately and effectively predict the movement of the ship in the next few seconds, it will have a great impact on navigation decisions.The research in this paper can predict the future navigation parameters and motion posture of unmanned boats.At the same time, it provides a reference for studying the wave resistance of such boats and the optimized design of subsequent boats.Provide technical support for improving the wave resistance of unmanned boats, and propose corresponding improvement methods.

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9

Title : Dynamic Performance Of DPFC In Hybrid System To Control Power Quality Problem Using Quantum Particle Swarm (QPSO) Optimization Algorithm

Authors : Dr. B. Gopinath, P. Madhumathi

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Abstract :

FACTS device are used to improve the power quality and maintain it over power systems. DPFC (Distributed Power Flow Controller) is one of the advanced devices used to control the power quality compared to UPFC (Unified Power Flow Controller) the operation functional is same. DPFC is same as UPFC by eliminating Dc link capacitor. In DPFC, instead of single three phase series converter it has the three individual single phase converters. DPFC is mainly used because it is distributing the power through distributing series converter. Control circuit of the DPFC is designed by using series connected voltages and the branch currents. In this DPFC device the third harmonic frequency is the major control loop with DPFC series converter control. It is highly reliable, high controllability and the cost of DPFC is low compared with the UPFC. Maximum Power Point Tracking (MPPT) is used for maximize the power output from solar and wind system. Particle Swarm Optimization is normally used to improve the efficiency of the power system and simplicity. Quantum Particle Swarm Optimization algorithm is used for solving complex problems both in constrained and unconstrained problems. QPSO algorithm is used on MPPT (Maximum Power Point Tracking). Renewable source like solar and wind system will have power quality problems are cleared by using FACTS device. The proposed QPSO algorithm is implemented in MATLAB/SIMULINK results are proved that power quality in power systems is maintained.

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