This paper presents a novel algorithm of fault location for transmission line. Solving the network spectrum equations for different frequencies the fault can be located accurately by this algorithm with one terminal data of voltage and current, and the identified parameters, such as fault distance, fault resistance, and opposite terminal system resistance and inductance. The algorithm eliminates the influence of the opposite system impedance on the fault location accuracy, which causes the main error in traditional fault location methods using one terminal data. A method of calculating spectrum from sampled data is also proposed. EMTP simulations show the validity and higher accuracy of the fault location algorithm compared to the existing ones based on one terminal data.

Objective To observe the 18F-FDG PET/CT manifestations of primary systemic anaplastic large cell lymphoma(ALCL).Methods A total of 21 patients with primary systemic ALCL were enrolled,and PET/CT manifestations were observed.Results Among 21 cases of ALCL,there were 15 cases of ALK+and 6 cases of ALK-.Affected lymph nodes in multiple site were observed in 19 cases,mainly located in the neck(n=13),mediastinum(n=12 cases)or retroperitoneum(n=12),while single site affected lymph node was notice in 2 cases.Extranodal organs/site involvements were found in 12 cases,including 6 cases of soft tissue(such as skin,muscles,etc.),4 cases of bone,14 cases of organs,including 4 cases of lung,3 cases of liver,2 cases of pancreas,2 cases of kidney,2 cases of gastrointestinal tract and 1 case of thyroid.Among 21 cases of ALCL,19 with irregular lymph node morphology and fused into clusters,17 with uniform density,3 with necrosis and 1 with calcification.All ALCL lesions in 21 cases showed hypermetabolism,the maximum standard uptake value(SUVmax)and the mean standard uptake value(SUVmean)of the affected lymph node was 17.04±9.94 and 9.96±6.15,respectively,while the metabolic tumor volume(MTV)and total lesion glycolysis(TLG)of all lesions was 92.54(67.61,249.21)cm3 and 723.46(419.78,1 461.17)g,respectively.The maximum diameter of the affected lymph node was not significantly correlated with SUVmax nor SUVmean(both P＞0.05),but positively correlated with MTV and TLG of all lesions(r=0.696,0.767,both P＜0.001).Ann Arbor staging was positively correlated with the maximum diameter,SUVmax and SUVmean of the affected lymph node,also MTV and TLG of all lesions(r=0.467,0.458,0.702,0.780,0.664,all P＜0.05).Conclusion 18F-FDG PET/CT manifestations of primary systemic ALCL were characteristic,with significant changed metabolic parameters,including SUVmax,SUVmean,MTV and TLG.

Objective : To investigate the role of iron uptake⁃related gene iucA in the pathogenesis of Uropathogenic E. coli(UPEC) , UPEC CFT073 strain was used to construct the iucA gene deletion strain ΔiucA by λ Red homologous recombination technology , and the complemented strain C ⁃iucA was also constructed. Methods : The proliferation rates of CFT073 , ΔiucA and C ⁃iucA in Luria⁃Bertani liquid medium and sterile urine were determined by measuring the absorbance at 600 nm. Cultured 5637 human bladder cancer epithelial cells confluent monolayers were incubated with CFT073 , ΔiucA and C ⁃iucA for adhesion and invasion ability assay. C57BL/6 mouse urinary tract infection model was constructed to assess colonization ability of CFT073 , ΔiucA and C ⁃iucA in murine bladder tissues. Results : Data showed that CFT073 , ΔiucA and C ⁃iucA displayed the similar proliferation curves in LuriaBertani liquid medium(P = 0. 153) . The proliferation rate of △iucA in sterile urine was lower than that of CFT073 ( P = 0. 001) , while the proliferation rate of C ⁃iucA in sterile urine was significantly higher than that of ΔiucA (P = 0. 005) . △iucA demonstrated much lower adhesion and invasion ability compared with CFT073 ( P = 0. 007 , 0. 002) , and C ⁃iucA showed significantly higher adhesion and invasion ability than △iucA( P = 0. 046 , 0. 037) . The colonization ability of △iucA in murine bladder tissues was much lower than that of CFT073 and C ⁃iucA(P = 0. 002 , 0. 017) . Conclusion The results indicate iucA gene may contribute to the proliferation , adhesion , invasion and colonization ability of UPEC.

Objective : To investigate the cross⁃sectional associations of serum interleukin( IL) Ⅳ18 with cartilage volume , cartilage defects , bone marrow lesions ( BML) and biomarkers of cartilage degradation in patients with knee osteoarthritis (OA) , and to provide new ideas and new methods for clinical diagnosis and treatment. Methods: The study included 151 patients with knee OA , a general questionnaire survey was conducted , and the knee strucral was photographed by magnetic resonance imaging (MRI) . The cartilage volume was measured by OsiriX software in 3D⁃FLASH sequence , and cartilage defect and BML were determined in T2⁃weighted sequence. Serum IL-18 and matrix metalloproteinase ( MMP) Ⅳ3 , 13 levels were measured by enzyme⁃linked immunosorbent assay(ELISA) . SPSS software was used for statistical analysis. Results : In multivariable analyses , serum IL⁃18 level was consistent at divided part of joint (femorotibial joint and the patella femoral joint , all P < 0. 05) . Serum IL⁃18 level was positively associated with cartilage defect and BML at media femorotibial area (all P < 0. 01) . Serum IL⁃18 level was positively associated with MMP⁃3 (β = 0. 31 , 95% CI:0. 001 - 0. 010) and MMP⁃13 (β = 0. 86 , 95% CI:0. 08 - 0. 10 , all P < 0. 01) . CI:0. 08 - 0. 10 , all P < 0. 01) . Conclusion Serum IL⁃18 level is negatively associated with cartilage volume and Serum IL⁃18 level is negatively associated with cartilage volume and positively associated with cartilage defect , BML , MMP⁃3 and MMP⁃13 , suggesting IL⁃18 may play a significant role duce the injury of article cartilage in patients with knee OA and delay the progression of disease.