In this study, we propose the use of the Degree of Alignment(DOA) in engineering applications for evaluating the precision of and identifying the transfer alignment on a moving base. First, we derive the statistical f...In this study, we propose the use of the Degree of Alignment(DOA) in engineering applications for evaluating the precision of and identifying the transfer alignment on a moving base. First, we derive the statistical formula on the basis of estimations. Next, we design a scheme for evaluating the transfer alignment on a moving base, for which the attitude error cannot be directly measured. Then, we build a mathematic estimation model and discuss Fixed Point Smoothing(FPS), Returns to Scale(RTS), Inverted Sequence Recursive Estimation(ISRE), and Kalman filter estimation methods, which can be used when evaluating alignment accuracy. Our theoretical calculations and simulated analyses show that the DOA reflects not only the alignment time and accuracy but also differences in the maneuver schemes, and is suitable for use as an integrated evaluation index. Furthermore, all four of these algorithms can be used to identify the transfer alignment and evaluate its accuracy. We recommend RTS in particular for engineering applications. Generalized DOAs should be calculated according to the tactical requirements.展开更多
BACKGROUND In clinical practice, checkrein deformity is usually found in patients with calf injuries after ankle fracture or distal tibial fracture. The patients with checkrein deformity mainly report distending pain ...BACKGROUND In clinical practice, checkrein deformity is usually found in patients with calf injuries after ankle fracture or distal tibial fracture. The patients with checkrein deformity mainly report distending pain in toe tips, pain when walking or wearing shoes, and gait instability. Previous studies have mainly reported surgical treatments for checkrein deformity, while few studies have reported using comprehensive rehabilitation alone to improve the checkrein deformity.CASE SUMMARY A 28-year-old woman was admitted to the hospital due to unstable gait caused by pain in the right hallux, for which she was unable to stretch for over three months. The patient had undergone "resection of ameloblastoma at the right mandible, mandibulectomy, and autogenous right fibula grafting". The patient’s hallux toe, as well as the second and third toes of the right foot could not be stretched, with pain in all the toes during walking. Based on the medical records of the patient, as well as the results of physical and auxiliary examinations, the main diagnosis was checkrein deformity in the right foot. Since the patient refused surgical treatment, rehabilitation was the only treatment option. At discharge, the patient reported evident improvement in the pain in the toes, gait stability, as well as increased ability to climb up and downstairs.CONCLUSION Comprehensive rehabilitation therapy could effectively alleviate the manifestations of checkrein deformity and improve the walking ability of the patients.展开更多
目的:探讨义齿咬合板联合综合物理疗法治疗颞下颌关节盘不可复性前移位(anterior disc displacement without reduction,ADDwoR)的疗效。方法:选择2019年1月—2020年12月衡水市人民医院口腔正畸修复科就诊的牙列缺损或牙重度磨耗并诊断...目的:探讨义齿咬合板联合综合物理疗法治疗颞下颌关节盘不可复性前移位(anterior disc displacement without reduction,ADDwoR)的疗效。方法:选择2019年1月—2020年12月衡水市人民医院口腔正畸修复科就诊的牙列缺损或牙重度磨耗并诊断为ADDwoR患者60例,根据治疗方法不同,随机分为义齿咬合板组(A组)和义齿咬合板+综合物理疗法组(B组)。治疗前、治疗时每3周记录患者最大主动开口度(maximum mouth opening,MMO)、视觉模拟量表疼痛评分(visual analog pain score,VAS)。治疗前及治疗后3个月拍摄锥形束CT(CBCT),分析2组患者治疗前、后临床疗效指标变化及颞下颌关节CBCT三维数据差异。采用SPSS 26.0软件包对数据进行统计学分析。结果:治疗后3周,2组VAS和治疗前相比差异有统计学意义(P<0.05)且B组VAS降低较多;治疗后3周起,B组MMO、VAS和治疗前相比差异有统计学意义(P<0.05)。治疗后9周起,A组MMO与治疗前相比差异有统计学意义(P<0.05),但A组与B组MMO、VAS无统计学差异(P>0.05)。CBCT显示,治疗后关节前间隙变窄,关节后间隙增宽,关节上间隙增大,髁突水平角减小,关节结节斜度、髁突高度增大(P<0.05);关节窝深度、髁突前后径、内外径相比差异无统计学意义(P>0.05)。与A组相比,B组治疗后关节前、上、后间隙,髁突水平角,关节结节斜度差异有统计学意义(P<0.05)。结论:义齿咬合板可有效改善ADDwoR症状,义齿咬合板联合综合物理疗法能迅速改善患者开口度,减轻患者关节区疼痛。展开更多
基金Supported by the National Natural Science Foundation of China （61633008）, the National Natural Science Foundation of China （61203225）, the Natural Science Foundation of Heilongjiang Province of China（QC2014C069）, the Special fund for the Central Universities （HEUCF160401）, and Provincial Postdoctoral Scientific Research Foundation （LBH-Q 15032）.
文摘In this study, we propose the use of the Degree of Alignment(DOA) in engineering applications for evaluating the precision of and identifying the transfer alignment on a moving base. First, we derive the statistical formula on the basis of estimations. Next, we design a scheme for evaluating the transfer alignment on a moving base, for which the attitude error cannot be directly measured. Then, we build a mathematic estimation model and discuss Fixed Point Smoothing(FPS), Returns to Scale(RTS), Inverted Sequence Recursive Estimation(ISRE), and Kalman filter estimation methods, which can be used when evaluating alignment accuracy. Our theoretical calculations and simulated analyses show that the DOA reflects not only the alignment time and accuracy but also differences in the maneuver schemes, and is suitable for use as an integrated evaluation index. Furthermore, all four of these algorithms can be used to identify the transfer alignment and evaluate its accuracy. We recommend RTS in particular for engineering applications. Generalized DOAs should be calculated according to the tactical requirements.
基金Supported by the Key Projects of the Natural Science Foundation in Colleges and Universities of Department of Education of Anhui Province,No.K12016A34Clinical Characteristics(Rehabilitation Medicine)Project of Quality Engineering of Anhui Province Education Department,No.tszy011
文摘BACKGROUND In clinical practice, checkrein deformity is usually found in patients with calf injuries after ankle fracture or distal tibial fracture. The patients with checkrein deformity mainly report distending pain in toe tips, pain when walking or wearing shoes, and gait instability. Previous studies have mainly reported surgical treatments for checkrein deformity, while few studies have reported using comprehensive rehabilitation alone to improve the checkrein deformity.CASE SUMMARY A 28-year-old woman was admitted to the hospital due to unstable gait caused by pain in the right hallux, for which she was unable to stretch for over three months. The patient had undergone "resection of ameloblastoma at the right mandible, mandibulectomy, and autogenous right fibula grafting". The patient’s hallux toe, as well as the second and third toes of the right foot could not be stretched, with pain in all the toes during walking. Based on the medical records of the patient, as well as the results of physical and auxiliary examinations, the main diagnosis was checkrein deformity in the right foot. Since the patient refused surgical treatment, rehabilitation was the only treatment option. At discharge, the patient reported evident improvement in the pain in the toes, gait stability, as well as increased ability to climb up and downstairs.CONCLUSION Comprehensive rehabilitation therapy could effectively alleviate the manifestations of checkrein deformity and improve the walking ability of the patients.
