In this paper, closure operators of lattice-valued propositional logic LP（X） are studied. A family of classical closure operators are defined and the relation between them and closure operators of LP（X） is investi...In this paper, closure operators of lattice-valued propositional logic LP（X） are studied. A family of classical closure operators are defined and the relation between them and closure operators of LP（X） is investigated. At the same time, a tool for checking compactness of LP（X） is given.展开更多
Velopharyngeal closure function following modified unified velopharyngeal plasty performed by a single surgeon was evaluated pre- and postoperatively in 14 children with cleft palate after cleft palate closure and no ...Velopharyngeal closure function following modified unified velopharyngeal plasty performed by a single surgeon was evaluated pre- and postoperatively in 14 children with cleft palate after cleft palate closure and no improvement by speech training. Subjects were evaluated for velopharyngeal closure function before and after surgery at 1 (short-term evaluation) and 3 (mid-term evaluation) years. Degree of hypernasality and degree of air leakage through the nose in the soft blowing test were each classified into three grades and each grade was given scores. Velopharyngeal closure function was classified according to the total score into four grades: “good”, 'fair”, 'slightly poor” and “poor”. At the short-term evaluation, 11 patients (78.6%) achieved an improvement to “good” or “fair” on the overall evaluation. More satisfactory results were obtained at the mid-term evaluation, with 14 patients (100%) graded as “good” or “fair”. Our results indicate that this modified unified velopharyngeal plasty effectively improves velopharyngeal insufficiency when performed as a secondary surgery for cleft palate in children.展开更多
Objective:To explore the operative nursing coordination method for the treatment of congenital atrial septal defect(ASD)by transcatheter closure of atrial septal defect via femoral vein.It provides useful experience f...Objective:To explore the operative nursing coordination method for the treatment of congenital atrial septal defect(ASD)by transcatheter closure of atrial septal defect via femoral vein.It provides useful experience for the treatment of congenital heart disease.Methods a total of 12 patients undergoing minimally invasive atrial septal defect closure via femoral vein from January 2017 to November 2017 in our department of cardiac surgery were selected as the subjects.All patients received transesophageal ultrasound guided ASD occlusion by femoral vein.The operation and nursing contents include preoperative care,the cooperation of the itinerant nurses,the coordination of the instrument nurses and the postoperative nursing.Results the operation of 12 patients in this group was successful.The diameter of the occluder was 17.1+4.5 mm during the operation.The time of tracheal intubation was 2.4+0.7 h,from the femoral vein to the sheath tube time was 38.7+9.4 min,the occupancy of ICU was 12.5+2.6 h after the operation.The average time of hospitalization was 4.5+1.8 D.There were 2 cases of shunt 1mm immediately after operation.After 24h reexamination,the shunt disappeared,the heart murmur disappeared in the rest of the patients.No residual shunt and other complications occurred.展开更多
The topological study of connectedness is heavily geometric or visual. Connectedness and connectedness-like properties play an important role in most topological characterization theorems, as well as in the study of o...The topological study of connectedness is heavily geometric or visual. Connectedness and connectedness-like properties play an important role in most topological characterization theorems, as well as in the study of obstructions to the extension of functions. In this paper, the behaviour of these properties in the realm of closure spaces is investigated using the class of perfect mappings. A perfect mapping is a type of map under which the image generally inherits the properties of the mapped space. It turns out that the general behaviour of connectedness properties in topological spaces extends to the class of isotone space.展开更多
Recently,much interest has been given tomulti-granulation rough sets (MGRS), and various types ofMGRSmodelshave been developed from different viewpoints. In this paper, we introduce two techniques for the classificati...Recently,much interest has been given tomulti-granulation rough sets (MGRS), and various types ofMGRSmodelshave been developed from different viewpoints. In this paper, we introduce two techniques for the classificationof MGRS. Firstly, we generate multi-topologies from multi-relations defined in the universe. Hence, a novelapproximation space is established by leveraging the underlying topological structure. The characteristics of thenewly proposed approximation space are discussed.We introduce an algorithmfor the reduction ofmulti-relations.Secondly, a new approach for the classification ofMGRS based on neighborhood concepts is introduced. Finally, areal-life application from medical records is introduced via our approach to the classification of MGRS.展开更多
利用眼睛的状态对驾驶员疲劳进行分析主要有人眼检测和疲劳判断两大问题。驾驶过程中受到光照、角度及眼睛闭合等因素的影响,传统的人眼检测技术误码率较高,而混合复杂的检测技术实时性较差。针对该问题,文章提出一种适用于驾驶员驾驶...利用眼睛的状态对驾驶员疲劳进行分析主要有人眼检测和疲劳判断两大问题。驾驶过程中受到光照、角度及眼睛闭合等因素的影响,传统的人眼检测技术误码率较高,而混合复杂的检测技术实时性较差。针对该问题,文章提出一种适用于驾驶员驾驶过程中的人眼快速定位算法。该方法由粗到细,综合运用基于OpenCV的人脸识别、二值化、改进型灰度积分投影、Susan算子角点提取等技术,并结合PERCLOS(percentage of eyelid closure)方法进行疲劳分析。实验结果表明,该方法对各种驾驶环境下驾驶员眼睛的定位,都能快速地获得较高的精度,疲劳检测正确率较高。展开更多
基金Supported by the National Natural Science Foundation of China(60474022)
文摘In this paper, closure operators of lattice-valued propositional logic LP（X） are studied. A family of classical closure operators are defined and the relation between them and closure operators of LP（X） is investigated. At the same time, a tool for checking compactness of LP（X） is given.
文摘Velopharyngeal closure function following modified unified velopharyngeal plasty performed by a single surgeon was evaluated pre- and postoperatively in 14 children with cleft palate after cleft palate closure and no improvement by speech training. Subjects were evaluated for velopharyngeal closure function before and after surgery at 1 (short-term evaluation) and 3 (mid-term evaluation) years. Degree of hypernasality and degree of air leakage through the nose in the soft blowing test were each classified into three grades and each grade was given scores. Velopharyngeal closure function was classified according to the total score into four grades: “good”, 'fair”, 'slightly poor” and “poor”. At the short-term evaluation, 11 patients (78.6%) achieved an improvement to “good” or “fair” on the overall evaluation. More satisfactory results were obtained at the mid-term evaluation, with 14 patients (100%) graded as “good” or “fair”. Our results indicate that this modified unified velopharyngeal plasty effectively improves velopharyngeal insufficiency when performed as a secondary surgery for cleft palate in children.
文摘Objective:To explore the operative nursing coordination method for the treatment of congenital atrial septal defect(ASD)by transcatheter closure of atrial septal defect via femoral vein.It provides useful experience for the treatment of congenital heart disease.Methods a total of 12 patients undergoing minimally invasive atrial septal defect closure via femoral vein from January 2017 to November 2017 in our department of cardiac surgery were selected as the subjects.All patients received transesophageal ultrasound guided ASD occlusion by femoral vein.The operation and nursing contents include preoperative care,the cooperation of the itinerant nurses,the coordination of the instrument nurses and the postoperative nursing.Results the operation of 12 patients in this group was successful.The diameter of the occluder was 17.1+4.5 mm during the operation.The time of tracheal intubation was 2.4+0.7 h,from the femoral vein to the sheath tube time was 38.7+9.4 min,the occupancy of ICU was 12.5+2.6 h after the operation.The average time of hospitalization was 4.5+1.8 D.There were 2 cases of shunt 1mm immediately after operation.After 24h reexamination,the shunt disappeared,the heart murmur disappeared in the rest of the patients.No residual shunt and other complications occurred.
文摘The topological study of connectedness is heavily geometric or visual. Connectedness and connectedness-like properties play an important role in most topological characterization theorems, as well as in the study of obstructions to the extension of functions. In this paper, the behaviour of these properties in the realm of closure spaces is investigated using the class of perfect mappings. A perfect mapping is a type of map under which the image generally inherits the properties of the mapped space. It turns out that the general behaviour of connectedness properties in topological spaces extends to the class of isotone space.
文摘Recently,much interest has been given tomulti-granulation rough sets (MGRS), and various types ofMGRSmodelshave been developed from different viewpoints. In this paper, we introduce two techniques for the classificationof MGRS. Firstly, we generate multi-topologies from multi-relations defined in the universe. Hence, a novelapproximation space is established by leveraging the underlying topological structure. The characteristics of thenewly proposed approximation space are discussed.We introduce an algorithmfor the reduction ofmulti-relations.Secondly, a new approach for the classification ofMGRS based on neighborhood concepts is introduced. Finally, areal-life application from medical records is introduced via our approach to the classification of MGRS.
文摘利用眼睛的状态对驾驶员疲劳进行分析主要有人眼检测和疲劳判断两大问题。驾驶过程中受到光照、角度及眼睛闭合等因素的影响,传统的人眼检测技术误码率较高,而混合复杂的检测技术实时性较差。针对该问题,文章提出一种适用于驾驶员驾驶过程中的人眼快速定位算法。该方法由粗到细,综合运用基于OpenCV的人脸识别、二值化、改进型灰度积分投影、Susan算子角点提取等技术,并结合PERCLOS(percentage of eyelid closure)方法进行疲劳分析。实验结果表明,该方法对各种驾驶环境下驾驶员眼睛的定位,都能快速地获得较高的精度,疲劳检测正确率较高。
