Objective To investigate the value of polar residual network(PResNet)model for assisting evaluation on rat myocardial infarction(MI)segment in myocardial contrast echocardiography(MCE).Methods Twenty-five male SD rats...Objective To investigate the value of polar residual network(PResNet)model for assisting evaluation on rat myocardial infarction(MI)segment in myocardial contrast echocardiography(MCE).Methods Twenty-five male SD rats were randomly divided into MI group(n=15)and sham operation group(n=10).MI models were established in MI group through ligation of the left anterior descending coronary artery using atraumatic suture,while no intervention was given to those in sham operation group after thoracotomy.MCE images of both basal and papillary muscle levels on the short axis section of left ventricles were acquired after 1 week,which were assessed independently by 2 junior and 2 senior ultrasound physicians.The evaluating efficacy of MI segment,the mean interpretation time and the consistency were compared whether under the assistance of PResNet model or not.Results No significant difference of efficacy of evaluation on MI segment was found for senior physicians with or without assistance of PResNet model(both P>0.05).Under the assistance of PResNet model,the efficacy of junior physicians for diagnosing MI segment was significantly improved compared with that without the assistance of PResNet model(both P<0.01),and was comparable to that of senior physicians.Under the assistance of PResNet model,the mean interpretation time of each physician was significantly shorter than that without assistance(all P<0.001),and the consistency between junior physicians and among junior and senior physicians were both moderate(Kappa=0.692,0.542),which became better under the assistance(Kappa=0.763,0.749).Conclusion PResNet could improve the efficacy of junior physicians for evaluation on rat MI segment in MCE images,shorten interpretation time with different aptitudes,also improve the consistency to some extent.展开更多
This paper starts with the analysis of the lack of students'innovation consciousness in the topic selection,and aims to improve the teachers cultivation of students innovation consciousness in the process of stude...This paper starts with the analysis of the lack of students'innovation consciousness in the topic selection,and aims to improve the teachers cultivation of students innovation consciousness in the process of students topic selection.Five guidelines:guide students to bring forth new ideas in“minor topic selection”,combine with the practical situation of the major,seek for innovation in the intersection of multiple disciplines,seek for innovation in previous research problems and seek for innovation in problem discussion.展开更多
Due to the outbreak of Covid-19,many institutes transformed the face-to-face class online.Yet many problems aroused from the online teaching,problems like the malfunction of LMS,students’retention to attend the class...Due to the outbreak of Covid-19,many institutes transformed the face-to-face class online.Yet many problems aroused from the online teaching,problems like the malfunction of LMS,students’retention to attend the class,very difficult to integrate the face-to-face and online teaching modes together etc.So the writer made an interview about online learning in UIS to Emily Boles who is Online Learning&Faculty Development Specialist,Center for Online Learning,Research and Service(COLRS),UIS.The interview focused on criteria of choosing a LMS(Learning Management System),making assessment of instructors and students,finding ways of integration of online learning and face to face teaching etc.The writer hope this article may give some reminders to the scholars in China who are concerned about the online learning and teaching.展开更多
文摘Objective To investigate the value of polar residual network(PResNet)model for assisting evaluation on rat myocardial infarction(MI)segment in myocardial contrast echocardiography(MCE).Methods Twenty-five male SD rats were randomly divided into MI group(n=15)and sham operation group(n=10).MI models were established in MI group through ligation of the left anterior descending coronary artery using atraumatic suture,while no intervention was given to those in sham operation group after thoracotomy.MCE images of both basal and papillary muscle levels on the short axis section of left ventricles were acquired after 1 week,which were assessed independently by 2 junior and 2 senior ultrasound physicians.The evaluating efficacy of MI segment,the mean interpretation time and the consistency were compared whether under the assistance of PResNet model or not.Results No significant difference of efficacy of evaluation on MI segment was found for senior physicians with or without assistance of PResNet model(both P>0.05).Under the assistance of PResNet model,the efficacy of junior physicians for diagnosing MI segment was significantly improved compared with that without the assistance of PResNet model(both P<0.01),and was comparable to that of senior physicians.Under the assistance of PResNet model,the mean interpretation time of each physician was significantly shorter than that without assistance(all P<0.001),and the consistency between junior physicians and among junior and senior physicians were both moderate(Kappa=0.692,0.542),which became better under the assistance(Kappa=0.763,0.749).Conclusion PResNet could improve the efficacy of junior physicians for evaluation on rat MI segment in MCE images,shorten interpretation time with different aptitudes,also improve the consistency to some extent.
文摘This paper starts with the analysis of the lack of students'innovation consciousness in the topic selection,and aims to improve the teachers cultivation of students innovation consciousness in the process of students topic selection.Five guidelines:guide students to bring forth new ideas in“minor topic selection”,combine with the practical situation of the major,seek for innovation in the intersection of multiple disciplines,seek for innovation in previous research problems and seek for innovation in problem discussion.
文摘Due to the outbreak of Covid-19,many institutes transformed the face-to-face class online.Yet many problems aroused from the online teaching,problems like the malfunction of LMS,students’retention to attend the class,very difficult to integrate the face-to-face and online teaching modes together etc.So the writer made an interview about online learning in UIS to Emily Boles who is Online Learning&Faculty Development Specialist,Center for Online Learning,Research and Service(COLRS),UIS.The interview focused on criteria of choosing a LMS(Learning Management System),making assessment of instructors and students,finding ways of integration of online learning and face to face teaching etc.The writer hope this article may give some reminders to the scholars in China who are concerned about the online learning and teaching.
