The Natural Science Foundation of the Education Department of Henan Province (2009A110003;2010A110005);the International Science and Technology Cooperation Project of Henan Province;the Foundation of Henan University of Technology
supported in part by the Special Funds for Major State Basic Research Project (2007CB814906);the National Natural Science Foundation of China (10471019,10471103, and10771158);Social Science Foundation of the Ministry of Education of China (numerical methods for convertiblebonds,06JA630047);Tianjin Natural Science Foundation (07JCYBJC14300);the State Key Laboratory ofScientific and Engineering Computing,and Tianjin University of Finance and Economics