In Chinese, dependency analysis has been shown to be a powerful syntactic parser because the order of phrases in a sentence is relatively free compared with English. Conventional dependency parsers require a number of...In Chinese, dependency analysis has been shown to be a powerful syntactic parser because the order of phrases in a sentence is relatively free compared with English. Conventional dependency parsers require a number of sophisticated rules that have to be handcrafted by linguists, and are too cumbersome to maintain. To solve the problem, a parser using SVM (Support Vector Machine) is introduced. First, a new strategy of dependency analysis is proposed. Then some chosen feature types are used for learning and for creating the modification matrix using SVM. Finally, the dependency of phrases in the sentence is generated. Experiments conducted to analyze how each type of feature affects parsing accuracy, showed that the model can increase accuracy of the dependency parser by 9.2%.展开更多
In order to obtain information or discover knowledge from system logs,the first step is to performlog parsing,whereby unstructured raw logs can be transformed into a sequence of structured events.Although comprehensiv...In order to obtain information or discover knowledge from system logs,the first step is to performlog parsing,whereby unstructured raw logs can be transformed into a sequence of structured events.Although comprehensive studies on log parsing have been conducted in recent years,most assume that one event object corresponds to a single-line message.However,in a growing number of scenarios,one event object spans multiple lines in the log,for which parsing methods toward single-line events are not applicable.In order to address this problem,this paper proposes an automated log parsing method for multiline events(LPME).LPME finds multiline event objects via iterative scanning,driven by a set of heuristic rules derived from practice.The advantage of LPME is that it proposes a cohesion-based evaluation method for multiline events and a bottom-up search approach that eliminates the process of enumerating all combinations.We analyze the algorithmic complexity of LPME and validate it on four datasets from different backgrounds.Evaluations show that the actual time complexity of LPME parsing for multiline events is close to the constant time,which enables it to handle large-scale sample inputs.On the experimental datasets,the performance of LPME achieves 1.0 for recall,and the precision is generally higher than 0.9,which demonstrates the effectiveness of the proposed LPME.展开更多
Objective:To investigate the safety and immunogenicity of the RAZI Cov Pars(RCP)vaccine in children and adolescents aged 5-17 years.Methods:In this open-label,single arm trial,26 of the 68 registered volunteers met th...Objective:To investigate the safety and immunogenicity of the RAZI Cov Pars(RCP)vaccine in children and adolescents aged 5-17 years.Methods:In this open-label,single arm trial,26 of the 68 registered volunteers met the inclusion criteria.The participants reccived RCP vaccinc twice intramuscularly(on days 0 and 21)and intranasally on day 51.Safety was assessed up to 6 months after the second dose.Immunogenicity was assessed on days 35,90,and 180 by measuring ncutralizing antibody levels as well as anti-RBD and anti-S,IgG antibodies.Results:Among the 26 volunteers,22 were in the age group of 5-11 years,and 4 were in the agc group of 12-17 years.No grade 3 or higher local or systemic adverse reactions were reported one weck after vaccination.Sixabnormal laboratory findings were observed after both vaccine doses,none of which were classified as grade 3 or higher.During a total follow-up period of 3875 person-years,31 adverse events were recorded(incidence rate:0.008).The scroconversion rates for VNT,anti-RBD and anti-S:IgGantibodies two wecks after recciving the second dose were 72.7%,76.2%and 80.9%,respectively.In the 5-11 year agc group,the scroconversion rates for VNT,anti-RBDand anti-S_(1) were 78.9%,83.3%and 88.9%,respectively.Conclusions:Intramuscular and intranasal administration of the RCPvaccine did not lead to scrious adverse events in any of the children or adolescents.The vaccine clicited a robust response in the 5-11 year age group two wecks after the second dose.Considering that this group reccived half of the adult vaccine dose,these results support the suitability of this dose for the study group.展开更多
AIM:To investigate the outcomes and prognosis of macular epiretinal membrane(ERM)after pars plana vitrectomy(PPV)in patients with high myopia(HM),focusing on the optimal timing of surgery and its impact on prognosis.M...AIM:To investigate the outcomes and prognosis of macular epiretinal membrane(ERM)after pars plana vitrectomy(PPV)in patients with high myopia(HM),focusing on the optimal timing of surgery and its impact on prognosis.METHODS:The clinical data of 50 eyes from 49 patients diagnosed with ERM,who were highly myopic and underwent PPV were retrospectively analyzed.The patients with ERM were classified into five groups based on the characteristics associated with different levels of myopic traction maculopathy.Group 1:Simple ERM without complex vertical and tangential direction traction on retina on optical coherence tomography(OCT)image;Group 2:ERM with obvious macular foveal schisis,without macular hole(MH);Group 3:ERM with inner lamellar MH,with or without macular foveal schisis;Group 4:ERM with outer lamellar MH,with or without foveal retinal detachment(RD);Group 5:ERM with full-thickness MH.Baseline characteristics,changes in best corrected visual acuity(BCVA)before and after surgery,and anatomical characteristics through spectral domain OCT were compared.RESULTS:The 50 eyes were followed for 6mo,with an average age of 58.66y and an average axial length(AL)of 28.69 mm.Among the five groups,postoperative logMAR BCVA improved(P<0.05).Group 1 had better mean BCVA at baseline(0.59±0.36)and at 6mo postoperatively(0.16±0.22)compared to the other groups,while Group 5 had worse mean BCVA at baseline(1.68±0.45)and at 6mo postoperatively(1.27±0.64).There were no statistically significant differences in sex,age or AL between the groups(P>0.05).OCT showed that Groups 4 and 5 exhibited poorer macular anatomy compared to the other three groups,as evidenced by lower rates of central retinal reattachment(64.3%in Group 4,86.7%in Group 5)and integrity of the inner segment/outer segment of photoreceptor junction(28.6%in Group 4,26.7%in Group 5).CONCLUSION:PPV is an effective treatment for ERM in patients with HM.All groups showed postoperative improvement in BCVA compared to preoperative levels,demonstrating the necessity of surgical intervention.Early intervention,particularly before the fourth stage of the disease,may lead to better visual outcomes.展开更多
AIM:To present a case series of rapid-onset neovascular glaucoma(NVG)accompanied by vitreous haemorrhage(VH)following cataract surgery in diabetic patients,and to evaluate the efficacy of pars plana vitrectomy(PPV)com...AIM:To present a case series of rapid-onset neovascular glaucoma(NVG)accompanied by vitreous haemorrhage(VH)following cataract surgery in diabetic patients,and to evaluate the efficacy of pars plana vitrectomy(PPV)combined with Ahmed glaucoma valve(AGV)implantation.METHODS:This is a retrospective,single-center,consecutive case series.All patients underwent 23-gauge PPV with AGV implantation 2–3d after intravitreal ranibizumab injection(IVR).The minimum postoperative follow-up period lasted 12mo.The primary outcome measures included bestcorrected visual acuity(BCVA),intraocular pressure(IOP),and topical hypotensive medications.RESULTS:Fifteen diabetic patients(age,46–81y)with rapid-onset NVG and VH following uncomplicated phacoemulsification were included.The median time to the initial NVG diagnosis following cataract surgery was within 4wk.After PPV combined with AGV implantation,the mean BCVA(logMAR)improved from 1.9(range:1.0 to 2.6)preoperatively to 1.2(range:0.2 to 2.6)at the final follow-up.Baseline BCVA and the presence of diabetic nephropathy(DN)were significantly associated with the final BCVA in the multiple regression model.The mean postoperative IOP at all follow-up visits was significantly reduced compared to baseline.At the final follow-up,9 patients required one or two topical ocular hypotensive medications,while the other 6 needed not.Success was achieved in 87%,and the reoperation rate was 20%.The majority of NVG cases(9/15)were primarily attributed to the rapid progression of proliferative diabetic retinopathy.However,a notable subset(6 eyes)was complicated retinal vein occlusion or carotid artery occlusion.CONCLUSION:PPV combined with AGV implantation after adjuvant IVR for rapid-onset NVG with VH following diabetic cataract surgery is one of the safe and effective treatments.Baseline BCVA and preexisting DN may be potential indicators for visual outcomes.展开更多
文摘In Chinese, dependency analysis has been shown to be a powerful syntactic parser because the order of phrases in a sentence is relatively free compared with English. Conventional dependency parsers require a number of sophisticated rules that have to be handcrafted by linguists, and are too cumbersome to maintain. To solve the problem, a parser using SVM (Support Vector Machine) is introduced. First, a new strategy of dependency analysis is proposed. Then some chosen feature types are used for learning and for creating the modification matrix using SVM. Finally, the dependency of phrases in the sentence is generated. Experiments conducted to analyze how each type of feature affects parsing accuracy, showed that the model can increase accuracy of the dependency parser by 9.2%.
文摘In order to obtain information or discover knowledge from system logs,the first step is to performlog parsing,whereby unstructured raw logs can be transformed into a sequence of structured events.Although comprehensive studies on log parsing have been conducted in recent years,most assume that one event object corresponds to a single-line message.However,in a growing number of scenarios,one event object spans multiple lines in the log,for which parsing methods toward single-line events are not applicable.In order to address this problem,this paper proposes an automated log parsing method for multiline events(LPME).LPME finds multiline event objects via iterative scanning,driven by a set of heuristic rules derived from practice.The advantage of LPME is that it proposes a cohesion-based evaluation method for multiline events and a bottom-up search approach that eliminates the process of enumerating all combinations.We analyze the algorithmic complexity of LPME and validate it on four datasets from different backgrounds.Evaluations show that the actual time complexity of LPME parsing for multiline events is close to the constant time,which enables it to handle large-scale sample inputs.On the experimental datasets,the performance of LPME achieves 1.0 for recall,and the precision is generally higher than 0.9,which demonstrates the effectiveness of the proposed LPME.
基金supported by the Razi Vaccine and Serum Research Institute(RVSRI)Karaj,Iran,(No.17-18-18-063-01047-011130).
文摘Objective:To investigate the safety and immunogenicity of the RAZI Cov Pars(RCP)vaccine in children and adolescents aged 5-17 years.Methods:In this open-label,single arm trial,26 of the 68 registered volunteers met the inclusion criteria.The participants reccived RCP vaccinc twice intramuscularly(on days 0 and 21)and intranasally on day 51.Safety was assessed up to 6 months after the second dose.Immunogenicity was assessed on days 35,90,and 180 by measuring ncutralizing antibody levels as well as anti-RBD and anti-S,IgG antibodies.Results:Among the 26 volunteers,22 were in the age group of 5-11 years,and 4 were in the agc group of 12-17 years.No grade 3 or higher local or systemic adverse reactions were reported one weck after vaccination.Sixabnormal laboratory findings were observed after both vaccine doses,none of which were classified as grade 3 or higher.During a total follow-up period of 3875 person-years,31 adverse events were recorded(incidence rate:0.008).The scroconversion rates for VNT,anti-RBD and anti-S:IgGantibodies two wecks after recciving the second dose were 72.7%,76.2%and 80.9%,respectively.In the 5-11 year agc group,the scroconversion rates for VNT,anti-RBDand anti-S_(1) were 78.9%,83.3%and 88.9%,respectively.Conclusions:Intramuscular and intranasal administration of the RCPvaccine did not lead to scrious adverse events in any of the children or adolescents.The vaccine clicited a robust response in the 5-11 year age group two wecks after the second dose.Considering that this group reccived half of the adult vaccine dose,these results support the suitability of this dose for the study group.
基金Supported by the National Natural Science Foundation of China(No.82371084).
文摘AIM:To investigate the outcomes and prognosis of macular epiretinal membrane(ERM)after pars plana vitrectomy(PPV)in patients with high myopia(HM),focusing on the optimal timing of surgery and its impact on prognosis.METHODS:The clinical data of 50 eyes from 49 patients diagnosed with ERM,who were highly myopic and underwent PPV were retrospectively analyzed.The patients with ERM were classified into five groups based on the characteristics associated with different levels of myopic traction maculopathy.Group 1:Simple ERM without complex vertical and tangential direction traction on retina on optical coherence tomography(OCT)image;Group 2:ERM with obvious macular foveal schisis,without macular hole(MH);Group 3:ERM with inner lamellar MH,with or without macular foveal schisis;Group 4:ERM with outer lamellar MH,with or without foveal retinal detachment(RD);Group 5:ERM with full-thickness MH.Baseline characteristics,changes in best corrected visual acuity(BCVA)before and after surgery,and anatomical characteristics through spectral domain OCT were compared.RESULTS:The 50 eyes were followed for 6mo,with an average age of 58.66y and an average axial length(AL)of 28.69 mm.Among the five groups,postoperative logMAR BCVA improved(P<0.05).Group 1 had better mean BCVA at baseline(0.59±0.36)and at 6mo postoperatively(0.16±0.22)compared to the other groups,while Group 5 had worse mean BCVA at baseline(1.68±0.45)and at 6mo postoperatively(1.27±0.64).There were no statistically significant differences in sex,age or AL between the groups(P>0.05).OCT showed that Groups 4 and 5 exhibited poorer macular anatomy compared to the other three groups,as evidenced by lower rates of central retinal reattachment(64.3%in Group 4,86.7%in Group 5)and integrity of the inner segment/outer segment of photoreceptor junction(28.6%in Group 4,26.7%in Group 5).CONCLUSION:PPV is an effective treatment for ERM in patients with HM.All groups showed postoperative improvement in BCVA compared to preoperative levels,demonstrating the necessity of surgical intervention.Early intervention,particularly before the fourth stage of the disease,may lead to better visual outcomes.
基金Supported by Shanghai Municipal Health Commission(No.202140183).
文摘AIM:To present a case series of rapid-onset neovascular glaucoma(NVG)accompanied by vitreous haemorrhage(VH)following cataract surgery in diabetic patients,and to evaluate the efficacy of pars plana vitrectomy(PPV)combined with Ahmed glaucoma valve(AGV)implantation.METHODS:This is a retrospective,single-center,consecutive case series.All patients underwent 23-gauge PPV with AGV implantation 2–3d after intravitreal ranibizumab injection(IVR).The minimum postoperative follow-up period lasted 12mo.The primary outcome measures included bestcorrected visual acuity(BCVA),intraocular pressure(IOP),and topical hypotensive medications.RESULTS:Fifteen diabetic patients(age,46–81y)with rapid-onset NVG and VH following uncomplicated phacoemulsification were included.The median time to the initial NVG diagnosis following cataract surgery was within 4wk.After PPV combined with AGV implantation,the mean BCVA(logMAR)improved from 1.9(range:1.0 to 2.6)preoperatively to 1.2(range:0.2 to 2.6)at the final follow-up.Baseline BCVA and the presence of diabetic nephropathy(DN)were significantly associated with the final BCVA in the multiple regression model.The mean postoperative IOP at all follow-up visits was significantly reduced compared to baseline.At the final follow-up,9 patients required one or two topical ocular hypotensive medications,while the other 6 needed not.Success was achieved in 87%,and the reoperation rate was 20%.The majority of NVG cases(9/15)were primarily attributed to the rapid progression of proliferative diabetic retinopathy.However,a notable subset(6 eyes)was complicated retinal vein occlusion or carotid artery occlusion.CONCLUSION:PPV combined with AGV implantation after adjuvant IVR for rapid-onset NVG with VH following diabetic cataract surgery is one of the safe and effective treatments.Baseline BCVA and preexisting DN may be potential indicators for visual outcomes.
