Ionic polymer-metal composites (IPMCs) show great potential in a large variety of engineering fields as actuator materials. They mainly consist of electrodes and ionic polymer as the substrate material. Many metal materials can be used as the electrode material of IPMCs. In this paper palladium was adopted to get a compromise between the cost and the stability, and Pd-Nafion IPMC was fabricated by chemical plating as test sample. Preliminary experiments were accomplished with satisfactory result using a suit of self-made measurement setup. The results showed that palladium was a good electrode material. Although some previous work has investigated on the elastic modulus of IPMCs by tensile test, a simple method based on the cantilever beam theory to estimate the modulus is still proposed here, which does not need a tensile testing machine. By the method we got that the elastic modulus of the sample is 362.35MPa.

This paper presents the design of a novel shape memory alloys (SMAs) damper, and its application in the vibration control of transmission towers. Firstly, based on a brief introduction for the essential properties of SMAs, a kind of constitutive model, i.e., the Brinson model is established to describe the unique behaviors of the material, combined with the experiments results. And then, a novel SMA damper, with the functions of displacement amplification and re-centering, is specifically designed by utilizing SMAs’ damping capacity. To verify and evaluate the device’s performance, the FEM model of an actual transmission tower is subsequently built in ANSYS, and by embedding the theoretical model of the damper into its analysis process, the responses of the tower subjected to the natural wind are numerically calculated. The results show that under the reasonable installations, the proposed SMA damper has a good effect on the wind-induced response control of the transmission tower.

As a member of Electroactive Polymers (EAPs), dielectric elastomer (DE) has shown considerable potential for energy harvesting applications. After the basic principle of DE energy harvesting is studied, a multi-layer DE generator using VHB 4910 (3M, USA) is specially designed and fabricated. Then, an improved energy harvesting circuit is designed to make use of harvested electrical energy. Finally, energy harvesting experiments are implemented under the constant charge (open-circuit) condition and the results prove that the multi-layer DE generator fabricated can produce enough energy to constantly drive a light emitting diode. The harvested electrical energy has good consistent with generated electrical energy and the maximum energy harvesting efficiency ηh can reach 89%.

-The combination of social responsibilities and study responsibilities in college English teaching is an important subject in foreign language education in college. It is the essential requirement to connect social responsibilities with study responsibilities, which follows the trend of college English teaching and acts as a very important point toward which the college English education is making an effort. The aim of the study is to promote English quality education. Some methods are utilized as deduction, illustration and so on. The result of the study is that English quality education is enhanced to benefit English education thoroughly.

Use NH4F as the electrolyte, prepared TiO2 nanotubes which orderly arranged by anodic oxidation. CdS was load to the TiO2-nanotubes by using chemical deposition method, then controlled size of CdS particles and uniformly load had been found when the EDTA-2NA was mixed in. The structure and morphology of TiO2 nanotubes and modified TiO2 nanotubes were observed by SEM. Use humic acid as simulate pollutant, investigate the efficiency of the CdS / TiO2nanotubes photocatalytic oxidation of organic compounds .The results show that CdS modified TiO2nanotubes arrays after added EDTA-2NA, the degradation rate of humic acid increased from 57.1 % to 85.4 % after illumination.