sing the natural limestone samples taken from the field with dimension of 500 mm×500 mm×1 000 mm, the D-D (dilatancy-diffusion) seismogeny pattern was modeled under the condition of water injection, which ob...sing the natural limestone samples taken from the field with dimension of 500 mm×500 mm×1 000 mm, the D-D (dilatancy-diffusion) seismogeny pattern was modeled under the condition of water injection, which observes the time-space evolutionary features about the relative physics fields of the loaded samples from deformation, formation of microcracks to the occurrence of main rupture. The results of observed apparent resistivity show: ① The process of the deformation from microcrack to main rupture on the loaded rock sample could be characterized by the precursory spatial-temporal changes in the observation of apparent resistivity; ② The precursory temporal changes of observation in apparent resistivity could be divided into several stages, and its spatial distribution shows the difference in different parts of the rock sample; ③ Before the main rupture of the rock sample the obvious ″tendency anomaly′ and ′short-term anomaly″ were observed, and some of them could be likely considered as the ″impending earthquake ″anomaly precursor of apparent resistivity. The changes and distribution features of apparent resistivity show that they are intrinsically related to the dilatancy phenomenon of the loaded rock sample. Finally, this paper discusses the mechanism of resistivity change of loaded rock sample theoretically.展开更多
Background:Knowledge of local antimicrobial resistance patterns is essential for evidence-based empirical antibiotic prescribing.We aimed to investigate the distribution and changes in causative agents of urinary trac...Background:Knowledge of local antimicrobial resistance patterns is essential for evidence-based empirical antibiotic prescribing.We aimed to investigate the distribution and changes in causative agents of urinary tract infections in children and the resistance rates,and to recommend the most appropriate antibiotics.Methods:In this retrospective study,we evaluated causative agents and antimicrobial resistance in urine isolates from the positive community from September 2014 to April 2016 in a single hospital in Ankara,Turkey.Results:A total of 850 positive urine cultures were identified,of which 588(69.2%)were from girls and 262(30.8%)were from boys.Their mean age was 36.5±45.0 months.The most common causative agent was Escherichia coli(64.2%of cases)followed by Klebsiella pneumoniae(14.9%).The overall resistance to ampicillin(62.6%),cephalothin(44.2%),co-trimoxazole(29.8%)and cefuroxime(28.7%)was significant.No resistance to imipenem was detected in the isolates.The least resistance was for amikacin,ceftriaxone,ciprofloxacin and cefepime(0.1,2.4,7.5 and 8.3%,respectively).Imipenem was the most active agent against E.coli followed by amikacin(0.2%),ceftriaxone(2.7%)and nitrofurantoin(5.1%).High resistance rates to nitrofurantoin were detected in K.pneumoniae,Proteus and Enterobacteriae.Conclusions:E.coli was the most common causative agent of urinary tract infection in children.Ampicillin,trimethoprim-sulfometaxazole,cephalothin and cefuroxim had the highest resistance rates against urinary tract pathogens in our center.For oral empirical antibiotherapy,cefixime is the most appropriate choice so as to include Klebsiella strains.展开更多
[ Objective] This paper aimed to understand drug resistance of Escherichia coli isolated from pets in Guangzhou. I Method ] Broth microdilution method was used to determine the minimal inhibitory concentration （MIC）...[ Objective] This paper aimed to understand drug resistance of Escherichia coli isolated from pets in Guangzhou. I Method ] Broth microdilution method was used to determine the minimal inhibitory concentration （MIC） of ceftiofur, enrofloxacin and other 11 kinds of antibiotics for antimicrobial agent susceptibility testing of 120 strains of clinical E. coli and the experimental data were processed by WHONET 5.4 software. Based on the results of drug resistance pattern analysis, it helped to analyze and study the resistance mechanism. EResultl Clinical E. coli isolated from pets showed a different drug resistance to the 13 kinds of veterinary clinical antibiotics, and the different sources of E. coli also showed a different drug resistance pattern.[Cenclmion] The study provided a theoretical basis for the clinical use of drugs and druq resistance surveillance.展开更多
In this paper, an electrical resistance tomography(ERT) imaging method is used as a classifier, and then the Dempster-Shafer's evidence theory with fuzzy clustering is integrated to improve the ERT image quality. ...In this paper, an electrical resistance tomography(ERT) imaging method is used as a classifier, and then the Dempster-Shafer's evidence theory with fuzzy clustering is integrated to improve the ERT image quality. The fuzzy clustering is applied to determining the key mass function, and dealing with the uncertain, incomplete and inconsistent measured imaging data in ERT. The proposed method was applied to images with the same investigated object under eight typical current drive patterns. Experiments were performed on a group of simulations using COMSOL Multiphysics tool and measurements with a piece of porcine lung and a pair of porcine kidneys as test materials. Compared with any single drive pattern, the proposed method can provide images with a spatial resolution of about 10% higher, while the time resolution was almost the same.展开更多
Objective:To assess multidrug resistant(MDR)Escherichia coli(E.coli)isolates from patients with urinary tract infection.Methods:From February to June 2014,a cross sectional study was conducted among urinary tract infe...Objective:To assess multidrug resistant(MDR)Escherichia coli(E.coli)isolates from patients with urinary tract infection.Methods:From February to June 2014,a cross sectional study was conducted among urinary tract infection patients at the University of Gondar Hospital.Culture and disk diffusion method were used for E.coli isolation and to determine the antibiotic susceptibility patterns.Data were entered and analyzed using SPSS version 20.P<0.05 was considered as statistically significant.Results:A total of 112 E.coli isolates were identified and the rate of isolation was higher among female participants(28.7%;P=0.03).Of the isolates,104(92.9%)were MDR E.coli;and the isolates showed high resistance rates towards ampicillin(99%),cotrimoxazole(69%),chloramphenicol(58.7%),gentamycin(56.7%)and ceftazidime(55.8%).However,comparative isolates showed low resistance rates to ciprofloxacin(1%),cefepime(8.7%),and ceftriaxone(11.5%).Moreover,resistance rates of MDR E.coli isolates were significantly higher than non-MDR strains for ceftazidime(55.8%versus 12.5%;P=0.015),and ampicillin(99%versus 87.5%;P=0.018).Conclusions:High prevalence of MDR E.coli isolates was observed in this study.Regular monitoring of antibiotic resistance rates is necessarily required to improve and revise empirical antibiotic therapy protocols.展开更多
文摘sing the natural limestone samples taken from the field with dimension of 500 mm×500 mm×1 000 mm, the D-D (dilatancy-diffusion) seismogeny pattern was modeled under the condition of water injection, which observes the time-space evolutionary features about the relative physics fields of the loaded samples from deformation, formation of microcracks to the occurrence of main rupture. The results of observed apparent resistivity show: ① The process of the deformation from microcrack to main rupture on the loaded rock sample could be characterized by the precursory spatial-temporal changes in the observation of apparent resistivity; ② The precursory temporal changes of observation in apparent resistivity could be divided into several stages, and its spatial distribution shows the difference in different parts of the rock sample; ③ Before the main rupture of the rock sample the obvious ″tendency anomaly′ and ′short-term anomaly″ were observed, and some of them could be likely considered as the ″impending earthquake ″anomaly precursor of apparent resistivity. The changes and distribution features of apparent resistivity show that they are intrinsically related to the dilatancy phenomenon of the loaded rock sample. Finally, this paper discusses the mechanism of resistivity change of loaded rock sample theoretically.
文摘Background:Knowledge of local antimicrobial resistance patterns is essential for evidence-based empirical antibiotic prescribing.We aimed to investigate the distribution and changes in causative agents of urinary tract infections in children and the resistance rates,and to recommend the most appropriate antibiotics.Methods:In this retrospective study,we evaluated causative agents and antimicrobial resistance in urine isolates from the positive community from September 2014 to April 2016 in a single hospital in Ankara,Turkey.Results:A total of 850 positive urine cultures were identified,of which 588(69.2%)were from girls and 262(30.8%)were from boys.Their mean age was 36.5±45.0 months.The most common causative agent was Escherichia coli(64.2%of cases)followed by Klebsiella pneumoniae(14.9%).The overall resistance to ampicillin(62.6%),cephalothin(44.2%),co-trimoxazole(29.8%)and cefuroxime(28.7%)was significant.No resistance to imipenem was detected in the isolates.The least resistance was for amikacin,ceftriaxone,ciprofloxacin and cefepime(0.1,2.4,7.5 and 8.3%,respectively).Imipenem was the most active agent against E.coli followed by amikacin(0.2%),ceftriaxone(2.7%)and nitrofurantoin(5.1%).High resistance rates to nitrofurantoin were detected in K.pneumoniae,Proteus and Enterobacteriae.Conclusions:E.coli was the most common causative agent of urinary tract infection in children.Ampicillin,trimethoprim-sulfometaxazole,cephalothin and cefuroxim had the highest resistance rates against urinary tract pathogens in our center.For oral empirical antibiotherapy,cefixime is the most appropriate choice so as to include Klebsiella strains.
基金supported by the Special Fund Project for the Institute Science and Technology Development and Demostration Extention of Henan Provincial Academy of Argricultural Sciences(Research of Zoonotic Small Animal Diseases)the Project for the 2012 Annual"University Students'Innovation Training Program",Southwest University for Nationalities(201210656017)the Special Fund Project for the Central University Basic Scientific Research Fund,Southwest University for Nationalities(11NZYTD02)
文摘[ Objective] This paper aimed to understand drug resistance of Escherichia coli isolated from pets in Guangzhou. I Method ] Broth microdilution method was used to determine the minimal inhibitory concentration （MIC） of ceftiofur, enrofloxacin and other 11 kinds of antibiotics for antimicrobial agent susceptibility testing of 120 strains of clinical E. coli and the experimental data were processed by WHONET 5.4 software. Based on the results of drug resistance pattern analysis, it helped to analyze and study the resistance mechanism. EResultl Clinical E. coli isolated from pets showed a different drug resistance to the 13 kinds of veterinary clinical antibiotics, and the different sources of E. coli also showed a different drug resistance pattern.[Cenclmion] The study provided a theoretical basis for the clinical use of drugs and druq resistance surveillance.
基金Supported by National Natural Science Foundation of China(No.61774014 and No.60772080)
文摘In this paper, an electrical resistance tomography(ERT) imaging method is used as a classifier, and then the Dempster-Shafer's evidence theory with fuzzy clustering is integrated to improve the ERT image quality. The fuzzy clustering is applied to determining the key mass function, and dealing with the uncertain, incomplete and inconsistent measured imaging data in ERT. The proposed method was applied to images with the same investigated object under eight typical current drive patterns. Experiments were performed on a group of simulations using COMSOL Multiphysics tool and measurements with a piece of porcine lung and a pair of porcine kidneys as test materials. Compared with any single drive pattern, the proposed method can provide images with a spatial resolution of about 10% higher, while the time resolution was almost the same.
文摘Objective:To assess multidrug resistant(MDR)Escherichia coli(E.coli)isolates from patients with urinary tract infection.Methods:From February to June 2014,a cross sectional study was conducted among urinary tract infection patients at the University of Gondar Hospital.Culture and disk diffusion method were used for E.coli isolation and to determine the antibiotic susceptibility patterns.Data were entered and analyzed using SPSS version 20.P<0.05 was considered as statistically significant.Results:A total of 112 E.coli isolates were identified and the rate of isolation was higher among female participants(28.7%;P=0.03).Of the isolates,104(92.9%)were MDR E.coli;and the isolates showed high resistance rates towards ampicillin(99%),cotrimoxazole(69%),chloramphenicol(58.7%),gentamycin(56.7%)and ceftazidime(55.8%).However,comparative isolates showed low resistance rates to ciprofloxacin(1%),cefepime(8.7%),and ceftriaxone(11.5%).Moreover,resistance rates of MDR E.coli isolates were significantly higher than non-MDR strains for ceftazidime(55.8%versus 12.5%;P=0.015),and ampicillin(99%versus 87.5%;P=0.018).Conclusions:High prevalence of MDR E.coli isolates was observed in this study.Regular monitoring of antibiotic resistance rates is necessarily required to improve and revise empirical antibiotic therapy protocols.
