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It gets extensive attention by scholars since the TAM is put forward. From the most primitive TAM to recently UTAUT2 proposed by Venkatesh, different scholars in different fields study on various TAM from different angles, and the technology acceptance related models experiences a series of development course. This study systematically arranges the papers in leading journals of technology acceptance study, takes the evolution process of each model as a logical clue, analyzes the technology acceptance research context systematically, and also points out the deficiencies in the technology acceptance research with the hope of providing some reference for the follow-up study.

Traditional methods such as scoring method, Likert scale method, etc, suffer from uncertainness, randomness and inaccuracy. To solve these problems, a cloud model is presented in this paper. Based on fuzzy mathematics and statistics, the cloud model can convert the qualitative evaluation of the product to quantitative scores. It’s a better way to overcome the disadvantages of direct scoring method that cause more inaccuracies. A prouct satisfaction evaluation model with three dimensions (i.e., evaluation index, product sets and estimator) is then constructed, which combines the cloud model and the grey relational analysis. Finally, the effectivity of the presented model is demonstrated by a case study.

This study presents a low-power wireless sensors system, which is based on a modular design approach for online monitoring the vibration signal of industrial equipment and the temperature and humidity of working environment. The system uses Low-power microcontroller MS P430 as the control unit, and uses the highly integrated modular device to collect the needed signal. A simple and efficient underlying protocol which is designed to meet the low power requirements of the system and ensure the accuracy of data transmission, and reduce operating frequency of the system by reducing the data redundancy. Under different operating conditions, the node is designed to meet performance requirements by selecting different working modes and power management modes, and greatly reduce the system power consumption.