Electrochemical micro-machining (ECMM) is a method that utilizes anode dissolution principle to process shaping. In the Electrochemical machining （ECM）of micro-hole, machining precision is an important aspect to measure machining quality of micro-hole. In this paper micro-hole machining is regarded as the research object, effects of many factors such as power supply natures, electrolyte composition, pulse width and pulse frequency on machining accuracy in micro-hole ECM have been evaluated. Research shows that processing accuracy can be improved through using non-linear electrolyte in high frequency, narrow pulse electrochemical machining.

With the development of computer technology and network application, the safety of application has become one of the most important research problems in the field of information security. Firstly, the paper analyzes malicious attack approaches for applications. Secondly, this article proposes an application anti-attack model (AAM), and further presents the formal description of the model. Finally, this paper represents its good security properties and proves them.

Aiming at the key techniques in ECM, the ECM system has been developed. The micro-tool-electrode and workpiece have been machined on the machine tool. Base on the experiment analysis of the effect of voltage, immersion depth, power characteristics on its forming laws in the micro-tool-electrode machining, the ECM has been realized in low concentration alkaline electrolyte. A micro-tool-electrode with the length of 1200 um, the diameter of 16 um, and aspect ratio of 75:1 has been machined by the developed machine tool.