Huang Zunxian s Chaoxian Celue and the Opening of Modern Korea;

Chinese sauce and salt culture and protection strategy in museum perspective——take the first Chinese sauce culture museum as an example

The main technical issues for VSC HVDC are reviewed, including converter topology, characteristics of two level and three level converters, pulse width modulation pattern, control strategy, protection strategy, switching frequency and loss reduction.

Based on the study above, some protective methods are compared, and a novel protection strategy is proposed, which is composed of BOD(break over diode) triggering thyristor valve and RC snubber circuit.

The nutrition condition of endangered mechanism and conservation strategy of rare plants;

Understanding the genetic differentiation of quantitative traits and local adaptation of the remnant populations should provide insight into the adaptation of different populations to their local environment and useful information for formulating appropriate conservation strategy.

A distributed maintain strategy for multiple unmanned aerial vehicle formation flight was designed by using comparative poison deviation.

Current Status and Conservation Strategy of the Wetlands in Nansha District,Guangzhou