Objective: To investigate the clinical effect of Magnetic force voice-controlled navigation for distal locking in the interlocking intramedullary nailing; Methods: 1) Developing a new kind of localizers, which adopt photoelectricity technology, combine study of magnetism and acoustics, using magnetical reciprocity to watch lockhole.

Clinial analysis of intraoperative real-time ultrasonic neuronavigation-guided microneurosurgery in removal of intracranial hematoma;

In this paper, we present the importance, research area and development situation of ocean acoustic technique, especially introduce the detection sonar, navigation sonar, positioning sonar, underwater acoustic communication system and acoustic tomography etc, and give the suggestion of development in the aspects mentioned above.