Since December 1986, acromiothoracic cutaneous flap (with its blood supply from the cutaneous perforators of deltoid muscular branches of thoracoacromial vessels) has been used for repair of the defects in the oral an...Since December 1986, acromiothoracic cutaneous flap (with its blood supply from the cutaneous perforators of deltoid muscular branches of thoracoacromial vessels) has been used for repair of the defects in the oral and maxillofacial region on 7 cases. All falps in this group survived. This skin flap must be very promising with advantages of an unexposed donor site, soft in texture and color matching the face. Moreover, the operation is less traumatic. The design and essential points of preparing the flap are introduced. The indication of operation is also discussed.展开更多
The left cheek of 8 adult male mongrel dogs was shot with M1935.56mm bul-let fired through an US-made M16 rifle to result in a perforating soft tissue defect.Pri-mary debridement was performed immediately and the seco...The left cheek of 8 adult male mongrel dogs was shot with M1935.56mm bul-let fired through an US-made M16 rifle to result in a perforating soft tissue defect.Pri-mary debridement was performed immediately and the secondary debridement 72h alter in-jury.After the secondary thorough debridement,the cutaneous side of the defect was re-paired with a saphenous artery-vein free skin(muscular)flap using microvascularanastomosis,and the oral side of the defect was repaired by drawing the surroundingmucosa together and fixing with sutures or with a local sliding mucous membrane flap.All the animals were kept under observation for 2～6 months.It was believed that the pri-mary debridement and secondary thorough debridement were both essential. The survivalrate of the free tissue flap was 75%(6/8).These facts suggest that early repair ofthe oromaxillofacial perforating soft tissue defect due to gunshot is practicable.展开更多
针对钢板表面缺陷检测过程中出现的检测精度不高、小缺陷定位不准、误检率和漏检率高的问题,提出一种改进的快速区域卷积神经网络(faster region-based convolutional neural network,简称Faster R-CNN)算法.实验结果表明:相对于CNN(con...针对钢板表面缺陷检测过程中出现的检测精度不高、小缺陷定位不准、误检率和漏检率高的问题,提出一种改进的快速区域卷积神经网络(faster region-based convolutional neural network,简称Faster R-CNN)算法.实验结果表明:相对于CNN(convolutional neural network),YOLOv3(the third version of you only look once),SSD(single shot multibox detector)和YOLOv5(the fifth version of you only look once)算法,该文算法的检测平均精度均值最高、缺陷定位最准确、分类成功率最高.因此,该文算法具有有效性.展开更多
文摘Since December 1986, acromiothoracic cutaneous flap (with its blood supply from the cutaneous perforators of deltoid muscular branches of thoracoacromial vessels) has been used for repair of the defects in the oral and maxillofacial region on 7 cases. All falps in this group survived. This skin flap must be very promising with advantages of an unexposed donor site, soft in texture and color matching the face. Moreover, the operation is less traumatic. The design and essential points of preparing the flap are introduced. The indication of operation is also discussed.
文摘The left cheek of 8 adult male mongrel dogs was shot with M1935.56mm bul-let fired through an US-made M16 rifle to result in a perforating soft tissue defect.Pri-mary debridement was performed immediately and the secondary debridement 72h alter in-jury.After the secondary thorough debridement,the cutaneous side of the defect was re-paired with a saphenous artery-vein free skin(muscular)flap using microvascularanastomosis,and the oral side of the defect was repaired by drawing the surroundingmucosa together and fixing with sutures or with a local sliding mucous membrane flap.All the animals were kept under observation for 2～6 months.It was believed that the pri-mary debridement and secondary thorough debridement were both essential. The survivalrate of the free tissue flap was 75%(6/8).These facts suggest that early repair ofthe oromaxillofacial perforating soft tissue defect due to gunshot is practicable.
文摘针对钢板表面缺陷检测过程中出现的检测精度不高、小缺陷定位不准、误检率和漏检率高的问题,提出一种改进的快速区域卷积神经网络(faster region-based convolutional neural network,简称Faster R-CNN)算法.实验结果表明:相对于CNN(convolutional neural network),YOLOv3(the third version of you only look once),SSD(single shot multibox detector)和YOLOv5(the fifth version of you only look once)算法,该文算法的检测平均精度均值最高、缺陷定位最准确、分类成功率最高.因此,该文算法具有有效性.
