With the development of microelectronic devices and the radio, the application of WSN has become more popular. It is relevant in a wide variety of areas. Because of this, it has attracted scholars. However, the requirements of WSN performance are increasing in terms of reducing energy consumption and prolonging the network lifetime. Therefore, many routing protocols have been proposed for WSNs in recent years which are effective in improving the performance of sensor networks. In the paper, we propose an energy efficient routing scheme based on clusters with a mobile sink consisting of six parts. Through the simulation, we have demonstrated that the proposed routing algorithm has a higher performance and can reduce energy consumption, increase the ratio of successfully delivered packets, and prolong the network lifetime.
Juice drinks are an important commercialization alternative for lychee, a tropical and subtropical fruit. Although the lychee juice content is important when assessing the quality of a drink, there are no published methods to determine it, particularly simple ones for the routine inspection of juice drinks. Lychee juice drinks contain ingredients with buffering capacity including proteins and ions such as phosphate, citrate, lactate, carbonate, acetate and propionate. The relationship between their buffering capacity and lychee juice content was studied. Citric acid was added to pure lychee dilutions in distilled water containing 100%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20% and 10% lychee juice. The pH of the dilutions was measured to obtain a linear model for the molar H+ concentration as a function of the added citric acid (g/L) amount LC =(BC-494.2)/12031, where LC is the lychee juice content and BC was defined as the juice buffering coefficient.