The system completes the communication between the personal computer and the CC2430 by the serial port. The serial port is not the RS232 serial port but a port from A type to the USB port. The phenomenon of the experiment is displayed with the help of the serial debugging assistant. The operator can send the data and receive it from the personal computer to the CC2430 on the computer. On the other side, the CC2430 is able to receive the data from the host computer and send it to the host computer. This realizes the operator controls the CC2430 by the personal computer. It consists the hardware part and the software part.

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This work uses a Wireless Sensor Networks(WSN) module to design the device of driving cars astern. The WSN node integrates MCU CC2430 and MCU C8051F120. CC2430 has 2.4 GHz IEEE 802.15.4 compliant RF transceiver. The device of driving cars astern can play a more important role when CC2430 communicates with C8051F120. This paper shows how to design an device of driving car astern. It should be applied widely.

The lattice parameters， elastic properties and electronic density of state of the （59Cr-41Ti）100－xVx（x=5， 15， 30， 60， 80， 100） V-based solid solution hydrogen storage alloys were calculated using the first-principles plane-wave pseudo-potential method based on the density functional theory， and the calculated results were in agreement with the experimental results. It was found that the V-based alloy x=60 showing better elastic properties， with the Young modulus Yzz=14930 GPa， shear modulus Ct=5442 GPa and bulk elastic modulus B=19396 GPa. By combining the experimental cyclic durability performance， we found plastic deformations occurred in the alloys. Thus， we concluded that the elastic properties were not the primary factor that determines the cyclic durability of the V-based hydrogen storage alloys. The micromechanism of the elastic properties of the impure alloys were also explained with the electronic density of state.

This work uses infrared physical properties to induce objects. And test results determine whether stepper motor wil run. The infrared sensor is not direct in contact with the measured object. There is no friction. The system has high sensitivity and accuracy. So it can be applied in production lines and to monitor the status of devices which is sensitive of temperature, such as engines.