The GCC is an auto-vectorization compiler across iterations of loops to parallelism data. Turning GCC compiler optimizations flags for auto-vectorization is a way to improve the performance ability, which is a popular approach to speed up program performance. However, there are many options in GCC compiler and selecting the best combination of these options to improve program performance through vectorization is non-trivial ( as the search space is very large ).In this work we focus on the selection of compiler transformations to auto-vectorize loops with conditional statements. The selection of compiler transformations is based on the correlation between program features, speed-up, and the analysis of the code generated and a small number of passes of iterative compilation. Our preliminary experimental results show that proposed technique attains performance improvements the best ~ 6x using loops in the TSVC benchmark suite on the state-of-the-art Intel Core i3 processor.

Modbus bus has been widely used in the power system. For the seamless integrated realization of enterprise control and management information, the remote interaction of Modbus bus meter data is needed. This design is based on the problems involved in the process of practical power system application. Using FPGA EP2C35F672 hardware platform, UART, DM9000A external chips are extended to complete remote operation and monitoring of Modbus equipment. The field bus and the Internet network interconnection can be realized, so the decentralization and open for control system are improved. The design can be used to rebuild the existing power field bus network. This design has good prospects and practical value.

Computation model for low alloy wear-resistant steel quenching process is established by finite element method. Four work conditions are designed for studying the effect of cooling uniformity of new cooler on quenching plate shape. The temperature and stress-strain field under four work conditions are calculated through the established model. The rule of plate deformation due to uneven cooling along transverse direction is obtained. The interaction of the thermal stress and phase stress is an important factor for plate deformation. The results of the study provide important theoretical basis to control wear-resistant steel plate deformation and improve production efficiency and manufacturing yield.

For new copper online cooling equipment, the heat transfer coefficients of impinging jet and flow cooling on the surface of copper plate are obtained through the finite element method. The results provide boundary conditions for temperature field computation. Three-dimensional temperature field compute model is built. Different nozzle horizontal distributions are designed. After calculation, the nozzle arrangement of cooling uniformity is obtained. The jet distribution density curve is used to get the transverse cooling intensity curve. The study provides theoretical basis for obtaining straight plate.

Now, Internal and external vehicles are artificially queried and identified by a specially-assigned person in most of schools and enterprises, so the workload of vehicle management is very heavy, what’s more the vehicles information can not be effectively preserved. So it is not convenient for vehicles access query in the furture. Using RFID intelligent sensor network technology, the intelligent monitoring and identifing of vehicles access was realized and vehicles access was better controlled. The system can provide real-time effective data for enterprises management. Through the unit LAN system, the remote transmission and perservation of the vehicle information and photos were completed, so the network management was realized and the information can be conveniently queried in the future.