The online diagnosis for aircraft system has always been a difficult problem. This is due to time evolution of system change, uncertainty of sensor measurements, and real-time requirement of diagnostic inference. To a...The online diagnosis for aircraft system has always been a difficult problem. This is due to time evolution of system change, uncertainty of sensor measurements, and real-time requirement of diagnostic inference. To address this problem, two dynamic Bayesian network(DBN) approaches are proposed. One approach prunes the DBN of system, and then uses particle filter(PF) for this pruned DBN(PDBN) to perform online diagnosis. The problem is that estimates from a PF tend to have high variance for small sample sets. Using large sample sets is computationally expensive. The other approach compiles the PDBN into a dynamic arithmetic circuit(DAC) using an offline procedure that is applied only once, and then uses this circuit to provide online diagnosis recursively. This approach leads to the most computational consumption in the offline procedure. The experimental results show that the DAC, compared with the PF for PDBN, not only provides more reliable online diagnosis, but also offers much faster inference.展开更多
A new online system of monitoring yarn quality and fault diagnosis is presented. This system integrates the technologies of sensor, signal process, communication, network, computer, control, instrument structure and m...A new online system of monitoring yarn quality and fault diagnosis is presented. This system integrates the technologies of sensor, signal process, communication, network, computer, control, instrument structure and mass knowledge of experts. Comparing with conventional off-line yarn test, the new system can find the quality defects of yarn online in time and compensate for the lack of expert knowledge in manual analysis. It can save a lot of yarn wasted in off-line test and improve product quality. By using laser sensor to sample the diameter signal of yarn and doing wavelet analysis and FFT to extract fault characteristics, a set of reasoning mechanism is established to analyze yarn quality and locate the fault origination. The experimental results show that new system can do well in monitoring yarn quality online comparing with conventional off-line yarn test. It can test the quality of yarn in real-time with high efficiency and analyze the fault reason accurately. It is very useful to apply this new system to upgrade yarn quality in cotton textile industry at present.展开更多
The study introduces the meanings of the technology on dedust fan′s online detection and fault diagnosis,the ways of fault diagnosis,the common fault analysis and the design of stealmaking gas dedust fan′s online fa...The study introduces the meanings of the technology on dedust fan′s online detection and fault diagnosis,the ways of fault diagnosis,the common fault analysis and the design of stealmaking gas dedust fan′s online fault diagnosis.It shows the whole system′s design,establishment and functional test.XM series modules have been used to realize the online fault diagnosis.The system′s functional requirements are proved by experiment.展开更多
＂HERE is your medicine,＂ said the delivery man, handing over two boxes of prescription drugs to Huang. a medical history-making chronic cardiovascular disease patient, identified only by her family name.
Clear cell sarcoma(CCS)is a rare melanocytic soft tissue sarcoma known for itspropensity to metastasize to the lymph nodes and typically has an unfavorableprognosis.Currently,surgical resection is the primary treatmen...Clear cell sarcoma(CCS)is a rare melanocytic soft tissue sarcoma known for itspropensity to metastasize to the lymph nodes and typically has an unfavorableprognosis.Currently,surgical resection is the primary treatment for localizedCCS,while radiotherapy and chemotherapy are preferred for metastatic cases.The roles of adjuvant chemotherapy,radiotherapy,and lymph node dissection arecontroversial.Although immunotherapy has emerged as a promising avenue inCCS treatment research,there are no established clinical standards for postoperativefollow-up.This editorial discusses a recent article by Liu et al,with afocus on current diagnostic modalities,treatment approaches,and the challengingprognosis associated with CCS.Our aim is to underscore the importance of longtermpatient follow-up in CCS management.展开更多
AIM To evaluate the effect of introducing a structured online follow-up system on the response rate.METHODS Since June 2015 we have set up an electronic followup system for prosthesis in orthopedic patients. This syst...AIM To evaluate the effect of introducing a structured online follow-up system on the response rate.METHODS Since June 2015 we have set up an electronic followup system for prosthesis in orthopedic patients. This system allows prospective data gathering using both online and paper questionnaires. In the past all patients received questionnaires on paper. This study includes only patients who received elbow arthroplasty. Response rates before and after introduction of the online database were compared. After the implementation,completeness of the questionnaires was compared between paper and digital versions. For both comparisons Fisher's Exact tests were used.RESULTS A total of 233 patients were included in the study. With the introduction of this online follow-up system,the overall response rate increased from 49.8% to 91.6%(P < 0.01). The response rate of 92.0% in the paper group was comparable to 90.7% in the online group(P > 0.05).Paper questionnaires had a completeness of 54.4%,which was lower compared to the online questionnaires where we reached full completeness(P < 0.01). Furthermore,non-responders proved to be younger with a mean age of 52 years compared to a mean age 62 years of responders(P < 0.05).CONCLUSION The use of a structured online follow-up system increased the response rate. Moreover,online questionnaires are more complete than paper questionnaires.展开更多
Objective： The diagnoses of patients with duodenal protruding lesions are difficult when using conventional examinations such as computed tomography （CT） and conventional endoscope etc. Thus, we investigated the cl...Objective： The diagnoses of patients with duodenal protruding lesions are difficult when using conventional examinations such as computed tomography （CT） and conventional endoscope etc. Thus, we investigated the clinical value of endoscopic ultrasonography （PUS） with miniature ultrasonic probes on the diagnosis and treatment of duodenal protruding lesions. Methods： Patients with duodenal protruding lesions who were indicated for PUS were examined by PUS with 12-15 MHz miniature ultrasonic probes and double-cavity electronic endoscope. According to diagnosis of PUS, those patients were indicated for biopsy and treatment received biopsy, endoscopic resection or surgical excision. The postoperative histological results were compared with the preoperative diagnosis of PUS. Those patients without endoscopic resection or surgical excision were periodically followed up with PUS. Results： A total of 169 patients with duodenal protruding lesions were examined by PUS, of which 40 were diagnosed with cysts, 36 with inflammatory protruding or polyp, 25 with Brunner＇s gland adenoma, 19 with ectopic pancreas, 17 with gastrointestinal stromal tumor, 12 with extrinsic compression, 12 with minor papilla, 6 with lipoma, 1 with adenocarcinoma and 1 with lymphoma. After PUS examinations, 75 patients received biopsy, endoscopic resection or surgical excision respectively. The postoperative histological results of 70 patients were completely consistent with the preoperative diagnosis of PUS, with 93.33% diagnostic accuracy. The results of follow-up with PUS indicated that duodenal cyst, Brunner＇s gland adenoma, ectopic pancreas, gastrointestinal stromal tumor and lipoma remained unchanged within 1-3 years. No related complications occurred among all patients that received PUS examinations. Conclusion： PUS is an effective and reliable diagnostic method for duodenal protruding lesions.展开更多
To reduce the variations of the production process in penicillin cultivations, a rolling multivariate statis-tical approach based on multiway principle component analysis (MPCA) is developed and used for fault diagnos...To reduce the variations of the production process in penicillin cultivations, a rolling multivariate statis-tical approach based on multiway principle component analysis (MPCA) is developed and used for fault diagnosis of penicillin cultivations. Using the moving data windows technique, the static MPCA is extended for use in dy-namic process performance monitoring. The control chart is set up using the historical data collected from the past successful batches, thereby resulting in simplification of monitoring charts, easy tracking of the progress in each batch run, and monitoring the occurrence of the observable upsets. Data from the commercial-scale penicillin fer-mentation process are used to develop the rolling model. Using this method, faults are detected in real time and the corresponding measurements of these faults are directly made through inspection of a few simple plots (t-chart, SPE-chart, and T2-chart). Thus, the present methodology allows the process operator to actively monitor the data from several cultivations simultaneously.展开更多
AIM: To determine whether online diffusion of the "Ten Warning Signs of Primary Immunodeficiency Diseases(PID)'' adheres to accepted scientific standards.METHODS: We analyzed how reproducible is online di...AIM: To determine whether online diffusion of the "Ten Warning Signs of Primary Immunodeficiency Diseases(PID)'' adheres to accepted scientific standards.METHODS: We analyzed how reproducible is online diffusion of a unique instrument, the "Ten Warning Signs of PID", created by the Jeffrey Modell Foundation(JMF),by Google-assisted searches among highly visited sites from professional, academic and scientific organizations;governmental agencies; and patient support/advocacy organizations. We examined the diffusion, consistency of use and adequate referencing of this instrument.Where applicable, variant versions of the instrument were examined for changes in factual content that would have practical impact on physicians or on patients and their families.RESULTS: Among the first 100 sites identified by Google search, 85 faithfully reproduced the JMF model, and correctly referenced to its source. By contrast, the other15 also referenced the JMF source but presented one or more changes in content relative to their purported model and therefore represent uncontrolled variants, of unknown origin. Discrepancies identified in the latter included changes in factual content of the original JMF list(C), as well as removal(R) and introduction(I) of novel signs(Table 2), all made without reference to any scientific publications that might account for the drastic changes in factual content. Factual changes include changes inthe number of infectious episodes considered necessary to raise suspicion of PID, as well as the inclusion of various medical conditions not mentioned in the original.Together, these changes will affect the way physicians use the instrument to consult or to inform patients,and the way patients and families think about the need for specialist consultation in view of a possible PID diagnosis.CONCLUSION: The retrieved adaptations and variants,which significantly depart from the original instrument,raise concerns about standards for scientific information provided online to physicians, patients and families.展开更多
基金Projects(2010ZD11007,20100751010)supported by Aeronautical Science Foundation of China
文摘The online diagnosis for aircraft system has always been a difficult problem. This is due to time evolution of system change, uncertainty of sensor measurements, and real-time requirement of diagnostic inference. To address this problem, two dynamic Bayesian network(DBN) approaches are proposed. One approach prunes the DBN of system, and then uses particle filter(PF) for this pruned DBN(PDBN) to perform online diagnosis. The problem is that estimates from a PF tend to have high variance for small sample sets. Using large sample sets is computationally expensive. The other approach compiles the PDBN into a dynamic arithmetic circuit(DAC) using an offline procedure that is applied only once, and then uses this circuit to provide online diagnosis recursively. This approach leads to the most computational consumption in the offline procedure. The experimental results show that the DAC, compared with the PF for PDBN, not only provides more reliable online diagnosis, but also offers much faster inference.
文摘A new online system of monitoring yarn quality and fault diagnosis is presented. This system integrates the technologies of sensor, signal process, communication, network, computer, control, instrument structure and mass knowledge of experts. Comparing with conventional off-line yarn test, the new system can find the quality defects of yarn online in time and compensate for the lack of expert knowledge in manual analysis. It can save a lot of yarn wasted in off-line test and improve product quality. By using laser sensor to sample the diameter signal of yarn and doing wavelet analysis and FFT to extract fault characteristics, a set of reasoning mechanism is established to analyze yarn quality and locate the fault origination. The experimental results show that new system can do well in monitoring yarn quality online comparing with conventional off-line yarn test. It can test the quality of yarn in real-time with high efficiency and analyze the fault reason accurately. It is very useful to apply this new system to upgrade yarn quality in cotton textile industry at present.
文摘The study introduces the meanings of the technology on dedust fan′s online detection and fault diagnosis,the ways of fault diagnosis,the common fault analysis and the design of stealmaking gas dedust fan′s online fault diagnosis.It shows the whole system′s design,establishment and functional test.XM series modules have been used to realize the online fault diagnosis.The system′s functional requirements are proved by experiment.
文摘＂HERE is your medicine,＂ said the delivery man, handing over two boxes of prescription drugs to Huang. a medical history-making chronic cardiovascular disease patient, identified only by her family name.
基金Liaoning Province Applied Basic Research Program Joint Program Project,No.2022JH2/101500076Shenyang Young and Middle-aged Science and Technology Innovation Talent Support Program,No.RC200438+1 种基金Tree Planting Program of Shengjing Hospital,No.M1595the Doctoral Start-up Foundation of Liaoning Province,No.2022-BS-127.
文摘Clear cell sarcoma(CCS)is a rare melanocytic soft tissue sarcoma known for itspropensity to metastasize to the lymph nodes and typically has an unfavorableprognosis.Currently,surgical resection is the primary treatment for localizedCCS,while radiotherapy and chemotherapy are preferred for metastatic cases.The roles of adjuvant chemotherapy,radiotherapy,and lymph node dissection arecontroversial.Although immunotherapy has emerged as a promising avenue inCCS treatment research,there are no established clinical standards for postoperativefollow-up.This editorial discusses a recent article by Liu et al,with afocus on current diagnostic modalities,treatment approaches,and the challengingprognosis associated with CCS.Our aim is to underscore the importance of longtermpatient follow-up in CCS management.
文摘AIM To evaluate the effect of introducing a structured online follow-up system on the response rate.METHODS Since June 2015 we have set up an electronic followup system for prosthesis in orthopedic patients. This system allows prospective data gathering using both online and paper questionnaires. In the past all patients received questionnaires on paper. This study includes only patients who received elbow arthroplasty. Response rates before and after introduction of the online database were compared. After the implementation,completeness of the questionnaires was compared between paper and digital versions. For both comparisons Fisher's Exact tests were used.RESULTS A total of 233 patients were included in the study. With the introduction of this online follow-up system,the overall response rate increased from 49.8% to 91.6%(P < 0.01). The response rate of 92.0% in the paper group was comparable to 90.7% in the online group(P > 0.05).Paper questionnaires had a completeness of 54.4%,which was lower compared to the online questionnaires where we reached full completeness(P < 0.01). Furthermore,non-responders proved to be younger with a mean age of 52 years compared to a mean age 62 years of responders(P < 0.05).CONCLUSION The use of a structured online follow-up system increased the response rate. Moreover,online questionnaires are more complete than paper questionnaires.
基金Project (No. 491010-W10495) supported by the Scientific ResearchFoundation of Medicine and Health of Zhejiang Province, China
文摘Objective： The diagnoses of patients with duodenal protruding lesions are difficult when using conventional examinations such as computed tomography （CT） and conventional endoscope etc. Thus, we investigated the clinical value of endoscopic ultrasonography （PUS） with miniature ultrasonic probes on the diagnosis and treatment of duodenal protruding lesions. Methods： Patients with duodenal protruding lesions who were indicated for PUS were examined by PUS with 12-15 MHz miniature ultrasonic probes and double-cavity electronic endoscope. According to diagnosis of PUS, those patients were indicated for biopsy and treatment received biopsy, endoscopic resection or surgical excision. The postoperative histological results were compared with the preoperative diagnosis of PUS. Those patients without endoscopic resection or surgical excision were periodically followed up with PUS. Results： A total of 169 patients with duodenal protruding lesions were examined by PUS, of which 40 were diagnosed with cysts, 36 with inflammatory protruding or polyp, 25 with Brunner＇s gland adenoma, 19 with ectopic pancreas, 17 with gastrointestinal stromal tumor, 12 with extrinsic compression, 12 with minor papilla, 6 with lipoma, 1 with adenocarcinoma and 1 with lymphoma. After PUS examinations, 75 patients received biopsy, endoscopic resection or surgical excision respectively. The postoperative histological results of 70 patients were completely consistent with the preoperative diagnosis of PUS, with 93.33% diagnostic accuracy. The results of follow-up with PUS indicated that duodenal cyst, Brunner＇s gland adenoma, ectopic pancreas, gastrointestinal stromal tumor and lipoma remained unchanged within 1-3 years. No related complications occurred among all patients that received PUS examinations. Conclusion： PUS is an effective and reliable diagnostic method for duodenal protruding lesions.
基金Supported by the National Natural Science Foundation of China (No.60574038).
文摘To reduce the variations of the production process in penicillin cultivations, a rolling multivariate statis-tical approach based on multiway principle component analysis (MPCA) is developed and used for fault diagnosis of penicillin cultivations. Using the moving data windows technique, the static MPCA is extended for use in dy-namic process performance monitoring. The control chart is set up using the historical data collected from the past successful batches, thereby resulting in simplification of monitoring charts, easy tracking of the progress in each batch run, and monitoring the occurrence of the observable upsets. Data from the commercial-scale penicillin fer-mentation process are used to develop the rolling model. Using this method, faults are detected in real time and the corresponding measurements of these faults are directly made through inspection of a few simple plots (t-chart, SPE-chart, and T2-chart). Thus, the present methodology allows the process operator to actively monitor the data from several cultivations simultaneously.
文摘AIM: To determine whether online diffusion of the "Ten Warning Signs of Primary Immunodeficiency Diseases(PID)'' adheres to accepted scientific standards.METHODS: We analyzed how reproducible is online diffusion of a unique instrument, the "Ten Warning Signs of PID", created by the Jeffrey Modell Foundation(JMF),by Google-assisted searches among highly visited sites from professional, academic and scientific organizations;governmental agencies; and patient support/advocacy organizations. We examined the diffusion, consistency of use and adequate referencing of this instrument.Where applicable, variant versions of the instrument were examined for changes in factual content that would have practical impact on physicians or on patients and their families.RESULTS: Among the first 100 sites identified by Google search, 85 faithfully reproduced the JMF model, and correctly referenced to its source. By contrast, the other15 also referenced the JMF source but presented one or more changes in content relative to their purported model and therefore represent uncontrolled variants, of unknown origin. Discrepancies identified in the latter included changes in factual content of the original JMF list(C), as well as removal(R) and introduction(I) of novel signs(Table 2), all made without reference to any scientific publications that might account for the drastic changes in factual content. Factual changes include changes inthe number of infectious episodes considered necessary to raise suspicion of PID, as well as the inclusion of various medical conditions not mentioned in the original.Together, these changes will affect the way physicians use the instrument to consult or to inform patients,and the way patients and families think about the need for specialist consultation in view of a possible PID diagnosis.CONCLUSION: The retrieved adaptations and variants,which significantly depart from the original instrument,raise concerns about standards for scientific information provided online to physicians, patients and families.
