A simple method for phosphate (Pi) detection is established by developing an off-on fluorescence probe of europium-adjusted carbon dots (CDs), which has been successfully applied to the detection of Pi in very complicated matrixes such as artificial wetlands system.

<abstract> <p>In this paper, Van Der Pol (VDP) oscillators are used as the output signal of central pattern generator (CPG), and a VDP-CPG network system of quadruped with four primary gaits (walk, trot, pace and bound) is established. The existence conditions of Hopf bifurcations for VDP-CPG systems corresponding to four primary gaits are given, and the coupling strength ranges between oscillators for four gaits are obtained. Numerical simulations are used to support theoretical analysis.</p> </abstract>

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RFID which is the logogram of the radio frequency identification is an automatically untouched identification technology. By the RFID technology, the moving objects, the remote objects as well as the multiple objects can be quickly identified and classified. As the super requirement of the speed of the informational response to the objects in the logistics management, the super performance of the RFID technology is more and more noticeable. In the nowadays, the RFID technology has been widely used in various fields, such as the anti-fake, communication transportation, warehouse logistics, production line management, air parcel management, animal husbandry management, medical treatment and public health, national defense security and so on. Although the RFID technology has been widely in various fields, the RFID based supply chain management system is relatively lack and weak. This paper proposed a method for applying the RFID technology on the supply chain management system. The key technology and the problems for the application of the RFID technology on the supply chain management system is proposed and the possible solution is presented as well.

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