AIM： To evaluate the clinical outcome of Ivor Lewis subtotal esophagectomy with two-field lymphadenectomy for patients with squamous cell carcinoma of the lower thoracic esophagus. METHODS： From January 1998 to Dece...AIM： To evaluate the clinical outcome of Ivor Lewis subtotal esophagectomy with two-field lymphadenectomy for patients with squamous cell carcinoma of the lower thoracic esophagus. METHODS： From January 1998 to December 2001, 73 patients with lower thoracic esophageal carcinoma underwent Ivor-Lewis subtotal esophagectomy with two-field lymphadenectomy. Clinicopathological information, postoperative complications, mortality and long term survival of all these patients were analyzed retrospectively. RESULTS： The operative morbidity and mortality was 15.1% and the mortality was 2.7%. Lymph node metastases were found in 52 patients （71.2%）. Nodal metastases to the upper, middle, lower mediastini and upper abdomen were found in 13 （17.8%）, 15 （20.5%）, 30 （41.1%）, and 25 （34.2%） patients, respectively. Postoperative staging was as follows： stage Ⅰ in 5 patients, stage Ⅱ in 34 patients, stage Ⅲ in 32 patients, and stage Ⅳ in 2 patients, respectively. The overall 5-year survival rate was 23.3%. For NO and N1 patients, the 5-year survival rate was 38.1% and 17.3%, respectively （X^2 = 22.65, P 〈 0.01）. The 5-year survival rate for patients in stages Ⅱ a, Ⅱ b and Ⅲ was 31.2%, 27.8% and 12.5%, repsectively （X^2 = 29.18, P 〈 0.01）. CONCLUSION： Ivor Lewis subtotal esophagectomy with two-field （total mediastinum） lymphadenectomy is a safe and appropriate operation for squamous cell carcinoma of the lower thoracic esophagus.展开更多
为了实现对城市地下综合管廊全域温度精准、高效、低成本的在线监测,解决分布式光纤温度传感(RDTS,raman distributed temperature sensor)面临的信噪比低、空间分辨率有限、小尺度异常不敏感、数据存储成本高及无法二维监测等技术瓶颈...为了实现对城市地下综合管廊全域温度精准、高效、低成本的在线监测,解决分布式光纤温度传感(RDTS,raman distributed temperature sensor)面临的信噪比低、空间分辨率有限、小尺度异常不敏感、数据存储成本高及无法二维监测等技术瓶颈。本文提出一套RDTS性能提升方法:包括采用GraphSAGE图神经网络的信号降噪方法;结合全变差反卷积与全连接神经网络的空间分辨率提升方法;利用注意力机制与K-Means聚类检测的小尺度异常检测方法;通过隐式神经表示的数据压缩方法;最终基于处理后的一维温度信号,通过特殊布线策略的二维温度场构建方法。该套方法能有效提升RDTS在测量精度、异常检测灵敏度和覆盖维度上的性能,为管廊全域温度监测提供了高准确度、小尺度、低成本的解决方案。展开更多
文摘AIM： To evaluate the clinical outcome of Ivor Lewis subtotal esophagectomy with two-field lymphadenectomy for patients with squamous cell carcinoma of the lower thoracic esophagus. METHODS： From January 1998 to December 2001, 73 patients with lower thoracic esophageal carcinoma underwent Ivor-Lewis subtotal esophagectomy with two-field lymphadenectomy. Clinicopathological information, postoperative complications, mortality and long term survival of all these patients were analyzed retrospectively. RESULTS： The operative morbidity and mortality was 15.1% and the mortality was 2.7%. Lymph node metastases were found in 52 patients （71.2%）. Nodal metastases to the upper, middle, lower mediastini and upper abdomen were found in 13 （17.8%）, 15 （20.5%）, 30 （41.1%）, and 25 （34.2%） patients, respectively. Postoperative staging was as follows： stage Ⅰ in 5 patients, stage Ⅱ in 34 patients, stage Ⅲ in 32 patients, and stage Ⅳ in 2 patients, respectively. The overall 5-year survival rate was 23.3%. For NO and N1 patients, the 5-year survival rate was 38.1% and 17.3%, respectively （X^2 = 22.65, P 〈 0.01）. The 5-year survival rate for patients in stages Ⅱ a, Ⅱ b and Ⅲ was 31.2%, 27.8% and 12.5%, repsectively （X^2 = 29.18, P 〈 0.01）. CONCLUSION： Ivor Lewis subtotal esophagectomy with two-field （total mediastinum） lymphadenectomy is a safe and appropriate operation for squamous cell carcinoma of the lower thoracic esophagus.
文摘为了实现对城市地下综合管廊全域温度精准、高效、低成本的在线监测,解决分布式光纤温度传感(RDTS,raman distributed temperature sensor)面临的信噪比低、空间分辨率有限、小尺度异常不敏感、数据存储成本高及无法二维监测等技术瓶颈。本文提出一套RDTS性能提升方法:包括采用GraphSAGE图神经网络的信号降噪方法;结合全变差反卷积与全连接神经网络的空间分辨率提升方法;利用注意力机制与K-Means聚类检测的小尺度异常检测方法;通过隐式神经表示的数据压缩方法;最终基于处理后的一维温度信号,通过特殊布线策略的二维温度场构建方法。该套方法能有效提升RDTS在测量精度、异常检测灵敏度和覆盖维度上的性能,为管廊全域温度监测提供了高准确度、小尺度、低成本的解决方案。
