The congregation of ceramic particulates in Aluminum hybrid metal matrix composites induces a greater significance in marine and automotive engineering applications because of its strength to weight ratio, good anti-corrosive properties, and high-temperature resistance. The research work focuses on the fabrication of hybrid metal matrix composite with influences of hard ceramic particulates like silicon carbide and dispersoid of graphite in Al-3Mg matrix material, and tribology behavior routed through the liquid metallurgical vortex method. The characterizations of conglomerate like, tensile properties, hardness, compression tests were investigated. The wear resistance increases with assorted graphite compositions. Microstructural examination shows the dispersoids of graphite and silicon carbides are uniformly distributed. The test results of Al-3Mg conglomerates reveal that tensile and hardness properties were enhanced with the addition of Gr. & SiC, as silicon carbide being a harder constituent mixed with a ductile matrix.

In the planned of LRT procurement for the Kuta - Ngurah Rai Airport route, it is necessary to determine the potential travel demand and passenger characteristics, so that the government and the industry involved can plan their infrastructure and facilities needs appropriately. The results analysis show that passengers are included in the choice group, meaning that almost all have private vehicles but they have high motivation for the availability of safe, comfortable and on time public transportation. Potential Demand Analysis with Stated Preference shows the highest choice is LRT/ART of Airport-Kuta-Sanur route 66.50% of passengers, the second choice using private vehicles 22.10% of passengers. The potential demand model for LRT/ART users can be well explained by the individual passengers characteristics with a significance level of 84.807%, and the effect of all variables on the model is 54.3%. The characteristics of passenger trips can also explain the model with a significance level of 87.342%, and the effect of all variables on the model is 65.8%. With this model, it is hoped that the LRT / ART type mass transit system will be able to compete with private cars, taxis or online-based public transportation.

Since mankind entered the industrial society, DC-DC converters have been used in many industries. The function of the DC-DC converter is a module that converts DC voltage into DC voltage, which can also be called a power processing system. The main content of this article is to explain the basic principles of Buck converters, and perform modeling and simulation on the MATLAB platform to prove the feasibility of expectations.

This paper carried out experimental research of concrete specimens with synthetic fibres under repeated splitting tension and uniaxial compression to investigate the efficiency of a proposed health monitoring methodology that implements surface-bonded piezoelectric transducers. The developed technique uses small-sized custom-made devices for diagnosing damage due to concrete cracking caused by the imposed repeated loading at various load levels. A test program of standard 150/300 mm cylinders and 150 mm cubes made of plain and fibre reinforced concrete subjected to splitting tensile and compressive repeated loading is presented and discussed. The proposed method utilises the frequency response measurements of a network of small-sized piezoelectric patches mounted to the surface of the tested specimens in order to detect the onset of damage since cracking has probably been developed in the inner concrete, whereas no visible cracks appeared on their surface. The objectives of this study also include development of a quantitative assessment procedure of damage using the statistical index values distribution at various points of measurements. The influence of distance, type of material (plain or fibrous concrete) and damage level triggers changes in the measurements of the piezoelectric transducers and the adopted statistical index seems to be a reliable assessment tool for damage quantification. Further, for the first time, a wireless and portable structural health monitoring system display feasible detection of premature cracks for damage prognosis in fibre reinforced concrete structural members.

This paper mainly studies the blind estimation and synthesis of frequency hopping points of speech signals based on frequency modulation in the case of frequency hopping.FM voice frequency hopping signal transmitter and receiver are built based on MATLAB platform. The transmitter FM modulates the original signal and then performs frequency hopping processing; the receiver blind estimates the frequency hopping point of the received signal.

The present and future trends from primary to tertiary industries are analyzed in detail. Put forward the implementation of agricultural mechanization, automobile manufacturing and mobile phone suggestions, and put them into practice. Specific response measures are pointed out in these large equipment, indicating that they are urgently needed to run the factory products. In additional wind generator and photovoltaic generator shall be established in Africa in order to promote new and non contamination energy. Due to its low labour and undeveloped industry many opportunity will await us to mine its countless challenge. Like south Africa they can live together with better status therefore the immigrant to south Africa has been our dream because of their development. So if endeavor is imported many new project will be found by us together. Let us continue to pay attention to Africa for better benefit and common development. In Africa the photovoltaic business makes a 3.5% in 2018 [1].