The method for designing single-hydrocylinder multi-direction core-pulling mechanism was proposed that solves the uneven pressure problem resulted from offset feeding of plastics in the injection process.

The variation of average voltage,inconsistency rates and capacity for VRLA batteries used in electric bicycles were investigated by means of cyclic tests at 85 % depth of discharge(DoD)and complete discharge.

The imbalance of pattern directly affects the precision of classifier.

Since the reform and opening-up policy being implemented,there appear obvious characteristics of the times in the re-search of social security in china academic circles,such as being initiated later than other countries,imbalance in research con-tents,relative inferiority in quality,self-containment and partiality in outwards-oriented studies,and popularity and rapidity in its development,etc.