A modified comprehensive learning particle swarm optimizer and its application in cylindricity error evaluation problem.

Particle swarm optimizer was proposed in 1995, and since then, it has become an extremely popular swarm intelligent algorithm with widespread applications. Many modified versions of it have been developed, in which, comprehensive learning particle swarm optimizer is a very powerful one. In order to enhance its performance further, a local search based on Latin hypercube sampling is combined with it in this work.

[Surgical treatment of massive soft tissue sarcoma in the shoulder girdle].

Objective: To detect the character of surgical treatment of massive soft tissue sarcoma in the shoulder girdle and analyze the impact factor to the result.

Methods: Seven patients with massive soft tissue sarcoma in the shoulder girdle were treated in our department between 2005 and 2009. There were 4 males and 3 females.

[Computer navigation-guided excision of osteoid osteomas].

Objective: To report the experience for the precision osteoid osteoma resection using computer navigation system.

Methods: Between January 2008 and December 2009, 26 surgical resections were performed for 26 patients who had osteoid osteoma with computer navigation system. There were 23 males and 3 females with an average age of 18 years (7 to 35).

[Clinicopathologic features of primary osteosarcoma in elderly patients].

Objective: To study the clinical manifestations, radiologic findings, pathologic diagnosis and differential diagnosis of primary osteosarcoma in elderly patients.

Methods: Twelve cases of primary osteosarcoma occurring in patients older than 60 years were encountered during the period from 1985 to 2010. The clinical manifestations, radiologic features and pathologic findings were studied and the follow-up data were analyzed.