山东省科技攻关计划项目2009GG10006012;滨州市科技发展计划项目[2010]26;国家自然科学基金项目31000059;the Science and Technology Development Project of Shandong Province2009GG10006012;the Science and Technology Development Project of Binzhou City[2010]26;the National Natural Science Foundation of China31000059