Magnetic hydroxyl microspheres were prepared by suspension polymerization and activated by epoxy chloropropane. The magnetic particles were characterized in terms of chemical composition, particle size and electrophoretic mobility. These epoxy-activated magnetic particles were assessed as a new carries for immobilized penicillin G acylase (PGA) by covalent coupling. The oriented PGA immobilization was achieved by employing the interaction electrostatic repulsion between PGA and magnetic supports through adding the phenyl acetic acid (PAA), which resulted in a 1.194-fold increase in the enzyme activity yield as compared to that of untreated PGA. No activity of immobilized PGA was lost after 20 cycles and about 94.28% enzyme activity was retained at the end of the 80th cycle in the batch reaction system.

To the problem of Linear motors temperature rise , and according to the basic theory of heat transfer, the heat conduction model of stator slot was established, the thermal conductivity of stator slot and the convection coefficient between the stator and rotor were determined .Based on this , the simulation model of motor transient temperature field operating at the polymorphism was established by using the finite element analysis software such as MagNet and ThemNet. Then the temperature field of the linear motor that work under the long-trem and periodic duty was calculated. Through the contrast and analysis between the simulation results and experimental data, the rationality of the simulation model and the correctness of calculation method were verified, which has effective help to design, manufacture and apply such kinds of special linear motor.

To the problem of small induction motor that supplied by Variable frequency power temperature rise, according to the basic theory of heat transfer and using finite element analysis software, in the paper, it established a motor of two-dimensional transient temperature field model ,though the equivalent simplify of the structure and thermal conductivity, and the compare between the simulation of finite element software studies and the temperature experimental tests , It confirms the affect that variable frequency power on the motor temperature rise, and finds a simplified simulation of motor temperature field and parameters equivalent approach which do provide effective help to the design and use of the induction motor.

The concept of smart home is gaining in popularity. A new interactive terminal applied to smart home basing on Z-Wave is given. The interactive terminal includes control module, source module, level shift module, display module, Z-Wave communication module and peripheral circuit module, etc. The Z-Wave communication module is connected with control module in two-way mode, and communicates with smart meter, smart socket and intelligent switch. Also, Z-Wave communication module receives the tariff information from grid. Peripheral circuit module is connected with control module in single-way mode, and provides control module with clock information and protection. The installation of the terminal is simple and convenient. The terminal can be split easily, and also has the strong anti-interference ability.

The artical for the consumption problem caused by carrier frequency of motor with variable frequency power supply.According to the principle of frequency conversion,the frequency conversion power model has been established, which applied to finite element model of motor.Then they implement joint simulation calculation. It is concluded that the characteristics relationship between the carrier frequency and loss of motor when variable frequency power supply. The characteristic of relationship between the loss of the motor and the carrier frequency proved by experiment when the carrier frequency inverter power supply.It has reference value for the design of variable frequency motor, frequency conversion application and energy saving.