This author has not been identified. Look up 'Weizhi Meng' in GoogleThis author has not been identified. Look up 'Elmar Tischhauser' in GoogleThis author has not been identified. Look up 'Qingju Wang' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Yu Wang' in GoogleThis author has not been identified. Look up 'Jinguang Han' in Google