Since the strain of erecting double contact wire of overhead contact system in urban rail transition is quite great, the author integrates the experience of construction of Shanghai Pear1 Line 1 in the first phase and holds that the application of equivalent load about strain to double wires in contact networks is safer and more reliable in the process of installement.

in this paper, three factors which effect on the load capacity of drytype electric power transformers, the surrounding temperature, heat time constant of winding and the initial load coefficient before overload operation, arediscussed respectively.

This paper introduces simulation methods of MCU hardware and software systems and help to solve actual problems by analyzing crystal circuit,electriferous reset and load capacity of the systems.

The design principles and composition of external amplifying circuit for improving voltage standard source load capacity are introduced in this paper.

motor speed control system with a load torque compensation is presented in this paper.

According to calculating load torque,load inertia and acceleration torque,considering the related parameters of all series servo motor of FANUC,the paper explains the particular process of AC servo motor selection with a true case.

The load torque which is an important parameter in the model is predicted by the soft measure method.

This paper presents a new concept of asymmetrical valve controlled asymmetrical cylinder,makes new definition of load flow and load pressure,thus illustrated static and dynamic properties of asymmetrical cylinders,derives its transfer function and block diagram,which can be universally applied to all kinds valve controlled cylinder and may be a meaningful guide to the design of such servo systems.

According to the working characteristics of the pump and valve combined EHA (Electrical Hydraulic Actuator), the method to improve the system efficiency by increasing the design value of load pressure was proposed.