Precise cable drive has been developed as an alternative transmission element to gearbox, belt and pulleys, chains and sprocket in Electro-Optical Tracking system. Precise cable drive has several significant advantages including backlash free, high stiffness, high efficiency, no lubrication etc.. This paper develops analytical methods to predict the Torsional Vibration of precise cable drive to enable designers to better assess dynamic performance in the design study phase. Theoretical formulation of transmission stiffness for precise cable drive is carried out, the dynamic equation of cable drive system is deduced and inherent frequency is obtained. Parametric studies are conducted to evaluate the relationship between the inherent frequency and cable drive parameters.

Synthesis of titanium dioxide sol was prepared by sol-gel method, using tetrabutyl titanate as source, ethanol as solvent, acetic acid as complexing agent. A transparent sol aging in air 30min, titanium dioxide films were prepared by using spin coating method. Congo red degradation was investigated by TiO2photocatalysis. Study the efficiency of decolorization was influenced by the coating times, heat-treated time, the initial concentration of congo red and solution pH.

Ionic Liquids is called also room temperature molten salt, its performance is mainly dependent on composition of cation and anion, and through molecular design the adjustment. And the traditional organic solvent, water, supercritical fluid and chemical reaction than solvent, ionic liquid in the following several aspects to show its prominent advantages. OP-BF4 ionic liquid is prepared by the double decomposition reaction of OPB and NaBF4. The ionic liquid at room temperature used in the experiment has a significant absorption determined by UV spectrum within the range of 200-400nm, the maximum absorption wavelength of OP-BF4 ionic liquid is 255nm. The standard working curve of OP-BF4 ionic liquid is y=0.06476+0.00967X (0.99918). The recovery rate of OP-BF4 ionic liquid which is between 96.4% and 102%, is measured by standard addition method in water. The quantitative analysis of OP-BF4 ionic liquids in water using ultraviolet spectroscopy is simple, accurate and reliable.