Automatic partition of Chinese sentence group is very important to the statistical machine translation system based on discourse. This paper presents an approach to this issue： first, each sentence in a discourse is ...Automatic partition of Chinese sentence group is very important to the statistical machine translation system based on discourse. This paper presents an approach to this issue： first, each sentence in a discourse is expressed as a feature vector; second, a special hierarchical clustering algorithm is applied to present a discourse as a sentence group tree. In this paper, local reoccurrence measure is proposed to the selection of key phras and the evaluation of the weight of key phrases. Experimental results show our approach promising.展开更多
BACKGROUND In general,atlantoaxial dislocation is rare due to the stability of the C1-C2 complex.Traumatic atlantoaxial dislocations are usually anterior and accompanied by odontoid fractures.Posterior atlantoaxial di...BACKGROUND In general,atlantoaxial dislocation is rare due to the stability of the C1-C2 complex.Traumatic atlantoaxial dislocations are usually anterior and accompanied by odontoid fractures.Posterior atlantoaxial dislocations are rare,and complete posterior dislocation without associated fracture is even more rare.A case of early recurrence of posterior atlantoaxial dislocation without fracture being in therapy of first closed reduction and then open reduction has not been previously reported.CASE SUMMARY A 45-year-old female presented with traumatic posterior atlantoaxial dislocation(TPAD)of C1-C2 without associated fractures,and Frankel Grade B spinal cord function.She was successfully managed by immediate closed reduction under skull traction.Unexpectedly,17 d later,re-dislocation was discovered.On day 28,closed reduction was performed as before but failed.Then,open reduction and posterior internal fixation with autologous iliac bone grafts was performed.By 6 mo after surgery,atlantoaxial joint fusion was achieved,and neurological function had recovered to Frankel Grade E.At 12 mo follow-up,she had lost only 15°of cervical rotation,and atlantoaxial complex instability in joint flexing and extending were no longer observed under fluoroscopy.CONCLUSION Early assessment of transverse ligament is critical for TPAD without fracture avoiding re-dislocation after closed reduction.展开更多
基金National High Technology Research and Development Program of China ( No.2006AA01Z139)Young NaturalScience Foundation of Fujian Province of China ( No.2008F3105)+1 种基金Natural Science Foundation of Fujian Province of China ( No.2006J0043)Fund of Key Research Project of Fujian Province of China (No.2006H0038)
文摘Automatic partition of Chinese sentence group is very important to the statistical machine translation system based on discourse. This paper presents an approach to this issue： first, each sentence in a discourse is expressed as a feature vector; second, a special hierarchical clustering algorithm is applied to present a discourse as a sentence group tree. In this paper, local reoccurrence measure is proposed to the selection of key phras and the evaluation of the weight of key phrases. Experimental results show our approach promising.
文摘BACKGROUND In general,atlantoaxial dislocation is rare due to the stability of the C1-C2 complex.Traumatic atlantoaxial dislocations are usually anterior and accompanied by odontoid fractures.Posterior atlantoaxial dislocations are rare,and complete posterior dislocation without associated fracture is even more rare.A case of early recurrence of posterior atlantoaxial dislocation without fracture being in therapy of first closed reduction and then open reduction has not been previously reported.CASE SUMMARY A 45-year-old female presented with traumatic posterior atlantoaxial dislocation(TPAD)of C1-C2 without associated fractures,and Frankel Grade B spinal cord function.She was successfully managed by immediate closed reduction under skull traction.Unexpectedly,17 d later,re-dislocation was discovered.On day 28,closed reduction was performed as before but failed.Then,open reduction and posterior internal fixation with autologous iliac bone grafts was performed.By 6 mo after surgery,atlantoaxial joint fusion was achieved,and neurological function had recovered to Frankel Grade E.At 12 mo follow-up,she had lost only 15°of cervical rotation,and atlantoaxial complex instability in joint flexing and extending were no longer observed under fluoroscopy.CONCLUSION Early assessment of transverse ligament is critical for TPAD without fracture avoiding re-dislocation after closed reduction.
