v1n2

Research on the Effect of Oxalic Acid Specific Surface Area on Rice Husk

Aariun kuygmark, L Waalakykosh and Yamazawa Kanmould

Department of Material Engineering, Middle East Technical University, North Cyprus Campus, Turkey

Page No: 56-66

Abstract: The aim of this research is to determine the effect of Oxalic acid on rice husk. Rice husk was collected from Osun State, Nigeria. Two methods of rice husk namely: Raw rice husk (RRH) and Leached rice husk (LRH) were subjected to thermal treatment at 7000C by varying the combustion time of 1-6h to determine the effect of time on the type of silica produced. The treated and untreated rice husks ash was then analysed by X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM). Favourable results were obtained from XRD patterns at 3h indicated that oxalic acid treated rice husk ash (LRHA) produced amorphous silica of good quality. However, specific surface area of the particle analysis at 3h, indicated the highest amount of 16.82mm²/g and also the SEM presented appropriated morphological characteristics of the best silica.

Keywords: rice husk, oxalic acid, specific surface area, xrd, amorphous silica

 

Application of High Frequency Vibration and Electromagnetic Exciting Force of Permanent Magnet Synchronous Motors

Weihua Li¹, Jun Qian¹, Meiyu Zhao¹ and Hongji Shan²

¹Department of Mechanical Engineering, Inner Mongolia Normal University, Hohhot, China

²School of Mechatronics, Qingdao Technological University, Qingdao, China

Page No: 67-77

Abstract: Permanent magnet synchronous motors (PMSM) generate high-frequency electromagnetic vibration and noise when powered by inverters， and the cause is high-frequency electromagnetic exciting force (EMEF). In this paper, the frequencies and orders of EMEF are analyzed. The expression of EMEF acted on the stator inner surface is derived and the frequencies and orders of main components of vibration are listed. The high-frequency vibration experiments are conducted on a surface mounted 8-pole and 12-slot PMSM. The high-frequency vibrations near switch frequency and its multiples are main components of vibrations of motors when powered by inverters, and experiments are conducted to study the influence of switch frequency on the vibration acceleration. The impacts of periodic frequency PWM and random frequency PWM on the vibration acceleration and peak value of its frequency spectrum are studied by experiments.

Keywords: PMSM, high-frequency vibration, electromagnetic exciting force, frequency

 

Methods for Improving the Performance of Fertigation Equipment Based on Embedded Self-adaptive Control System

Shan Kang

Department of Automation, Hebei University of Technology, Shijiazhuang, China

Page No: 78-86

Abstract: In order to improve the performance of fertigation equipment, a fertigation control system based on ARM and μC/OS-II is developed. Serial screen is adopted to improve the performance of human-machine interaction, and to decrease the load of MCU. Several tasks related to the control system and fertigation process are designed based on the schedule of μC/OS-II. Furthermore, a self-adaptive control algorithm combined the single neuron with PID is proposed. The testing results of EC and PH control demonstrate that this method is effective to the fertigation control system.

Keywords: fertigation, ARM, self-adaptive, ANN-PID

 

Research and Improvement of the Vulnerability Detection for Industrial Control System under Security Threats

Lan Wang¹ and Liang Lin²

¹School of Information Technology, Shaanxi Normal University, Xi’an, China

²International School of Software, Wuhan University, Wuhan, China

Page No: 87-93

Abstract: With the development of ICS, PLC and SCADA systems are interconnected with Ethernet and directly connected to internet, which greatly improve the efficiency of data sharing and introduced in security threats at the same time. Once crack fault occurrence of critical infrastructure will result in casualties and great economic loss. Peach Fuzzer is an advanced and extensible fuzzing platform and is restricted to those with TCP/UDP-based protocols on Windows Platform, the PN-DCP would not be supported  without publisher to send PDU correctly. So it is urgent to develop an additional publisher for PN-DCP. In this paper, we propose a novel Peach improvement on Profinet-DCP for industrial control system vulnerability detection. We analyze the importance of vulnerability detecting for PN-DCP with Peach Fuzzer. Then, introducing the Peach Framework, the hierarchy of Profinet-DCP and the PitFile of Profinet-DCP. We also evaluate our approach through experiments, the results can fully satisfy the requirement of vulnerability detecting of PN-DCP on Peach platform.

Keywords: peach, fuzzing, profinet-DCP, security threats, industrial safety

 

Safety Management of Coagulant Protein from Parkinsonia Seed and Drinking Water on Antibacterial Effect in Tanzania Ruvu River

M. Mijarnthana and James Bethanis

School of Bioengineering, Annamalai University, Annamalai Nagar, India

Page No: 94-103

Abstract: A total of 126 bacterial strains were isolated from water samples collected from Ruvu River in Tanzania. Seventy strains were identified by morphological, biochemical and 16s rRNA gene sequence analysis. The strains were found to belong to Acinetobacter, Pseudomonas, Vibrio, Aeromonas or Bacillus spp. Coagulant protein was purified from Parkinsonia aculeata seed by ion exchange chromatography. Antibacterial effect of the purified P. aculeata coagulant protein (PAP) and Citrus fruit juice (CF) was tested on four bacterial strains that belonged to different genera. Bacterial cell flocculation analyses showed that, PAP and CF aggregate both Gram-positive and Gram-negative bacteria. Growth studies of bacterial strains incubated with PAP and CF revealed that, inhibitory dosages of PAP ranged from 0.38 mg/L to 0.88 mg/L and growth inhibition occurred within two to four hours. The PACE and PAP showed high coagulation activities that were similar to those observed for chemical coagulant (alum) with turbidity removal efficiencies ranging from 93 to 98%. A simplified method used for purification of proteins together with high antimicrobial and water coagulation activity make proteins suitable for supplementing chemical coagulants in drinking water treatment. Also, CF is suitable for post disinfection of water treated with proteins prior drinking in poor communities.

Keywords: drinking water, purified seed protein, water coagulation, antibacterial effect

 

Evaluation Means and Statistics Parameter Research of Architecture Analysis Modeling and Complex Networks Methods in Aviation Ammunition

Penghua Wei

School of Network Engineering, Shanghai Institute of Technology, Shanghai, China

Page No: 104-111

Abstract: This paper introduces some modeling means of weapon equipment support system-of-systems first, analyzes the feasibility of aviation ammunition support system-of-systems（AASSoS）based on Complex Networks methods. Then, a network model of the AASSoS architecture was established after introducing the statistics parameter of the Complex Networks and giving the hypothesizes and generating algorithms of AASSoS. At last, by giving the means of evaluation, it shows that the models and the method were effective and scientific in the reality examples.

Key words: aviation ammunition, complex network, architecture analysis, evaluation means

 

Research and Reconstruction on Coordinate Transformation and Robust Fault Diagnosis by Sensor and Actuator Fault in Nonlinear System

Haolin Wan¹, Lu Li¹, Pisheng Shi² and An Yang²

¹Key Laboratory of the Three Gorges Reservoir’s Eco-Environments, Chongqing University, Chongqing, China

²School of Resources and Environment, Chongqing University, Chongqing, China

Page No: 112-120

Abstract: This paper presents a fault reconstruction scheme based on sliding mode observers for sensor and actuator faults detection and isolation for a class of uncertain nonlinear systems. A coordinate transformation is first designed for the output equation of the system followed by a first-order low-pass filter in order to convert the sensor faults into equivalent actuator faults. The original system then is transformed into three subsystems through linear transformation.

Keywords: coordinate transformation, robust fault diagnosis, fault reconstruction, sliding mode observer

 

A Study on Instability of Two Stratified Elastic Viscous Superposed Fluids Permeated with Suspended Particles in Contrast to the Newtonian Fluid

Z Zangoroo and L Magalinaas

University of Venda, Department of Physics, Thohoyandou, South Africa

Page No: 121-129

Abstract: The stability of two stratified Rivlin-Ericksen elastico-viscous superposed fluid permitted with suspended particles (fine dust) in porous medium has been considered. By applying normal mode analysis method, the dispersion relation has been derived and solved analytically. For case of exponential varying stratifications, it has been found that the system is stable for stable stratifications and unstable for unstable stratifications under certain conditions which are in contrast to the Newtonian fluid where the system is always stable for stable stratifications.

Keywords: superposed fluid; suspended particles; porous medium

 

Innovation Management and Empirical Study in Green Supply Chain and Reliability Analysis in Indian Perspective

S Syolan Belutami¹ and Q Philidamailía²

¹Department of Agriculture, Karunya University, India

²Departamento de Ingeniería Eléctrica, Universidad Distrital Francisco José de Caldas, Bogotá, Colombia

Page No: 130-137

Abstract: This study aims to rank, interactions, and weightage of critical success factors(CSF) of  the green supply chain management(GSCM) in Indian manufacturing sector. The approach of the present research includes a literature review, in depth interviews and questionnaire surveys. This study aims to recognize and select appropriate strategy for implementing GSCM in Indian manufacturing industry. Based on an extended literature review, various approaches were identified to determine their reliability and validity and were extracted into studied dimensions. The AHP was applied for determining relative importance and selecting appropriate approach in GSCM practice.

Keywords: green supply chain management, reliability analysis, AHP methodology

 

Application of α Consumption Function in the Clinical Trials for Group Sequential Design Based on Multiple Statistical Analyses

Hui Ma

School of Economic Management, Jilin University, Jilin, China

Page No: 138-148

Abstract: It takes the group sequential design as a method during the period of having interim analysis, in the clinical trial period, it can have multiple statistical analysis, which also can make an early decision to stop testing, so as to save manpower, material and financial resources and so on. In this paper, it takes the definition of group sequential design as the starting point, with the help of the the interpretation of the effectiveness of group sequential testing theory, making analysis on the application of α consumption function as the method in clinical trials.

Keywords: consumption function, sequential design, multiple statistical analyses