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GPS tracking ship is an automatic equipment used to measure water-depth, which is based on the GPS navigational signals, and the system needs real-time and efficient data acquisition through serial ports. The technology of multi-thread serial communication is applied to meet the requirements of the system. In this paper, the application of multi-thread and serial communication based on Win32 API functions is introduced. Meanwhile, a new programming method is developed, considering the specific feature of the system. With the multi-thread serial communication, the program operates steadily in Windows XP system, and has a considerable practical value in application. [ABSTRACT FROM PUBLISHER]

In order to improve the level of quality safety management of broilers products, combining theory of agricultural products traceability with technology of short message of mobile phone, traceability system of broilers products quality was developed in integrated development environment of Microsoft Visual Studio 2008 by using 8 port GSM Modem as hardware device. Dedicated to the deficiencies in real-time characteristic, concurrency and other performance of short message applications controlled by GSM Modem, on the basis of queuing theory model, multi-port queue model, multi-threading, thread pool and dynamic database connection pool technology adopted in the system increases the speed and the efficiency of the short message receiving and sending, and improve the overall performance of the system, consequently satisfy consumers' traceability demand of broilers products. [ABSTRACT FROM PUBLISHER]