AIM:To study the short-term outcome of patients treated with laparoscopic right colectomy and how intracorporeal anastomosis has improved the outcome.METHODS:We retrospectively examined all patients affected by colore...AIM:To study the short-term outcome of patients treated with laparoscopic right colectomy and how intracorporeal anastomosis has improved the outcome.METHODS:We retrospectively examined all patients affected by colorectal cancer who underwent a laparoscopic right colectomy between January 2006 and December 2010 in our department.Our evaluation criteria were:diagnosis of colorectal carcinoma at presurgical biopsy,elective surgery,and the same surgeon.We excluded:emergency surgery,conversions from laparotomic colectomy,and other surgeons.The endpoints we examined were:surgical time,number of lymph nodes removed,length of stay(removal of nasogastric tube,bowel movements,gas evacuation,solid and liquid feeding,hospitalization),and major complications.Seventy-two patients were divided into two groups:intracorporeal anastomosis(39 patients)and extracorporeal anastomosis(33 patients).RESULTS:Significant differences were observed between intracorporeal vs extracorporeal anastomosis,respectively,for surgical times(186.8 min vs 184.1 min,P < 0.001),time to resumption of gas evacuation(3 d vs 3.5 d,P < 0.001),days until resumption of bowel movements(3.8 d vs 4.9 d,P < 0.001),days until resumption of liquid diet(3.5 d vs 4.5 d,P < 0.001),days until resuming a solid diet(4.6 d vs 5.7 d,P < 0.001),and total hospitalization duration(7.4 d vs 8.5 d,P < 0.001).In the intracorporeal group,on average,19 positive lymph nodes were removed;in the extracorporeal group,on average,14 were removed P < 0.001).Thus,intracorporeal anastomosis for right laparoscopic colectomy improved patient outcome by providing faster recovery of nutrition,faster recovery of intestinal function,and shorter hospitalization than extracorporeal anastomosis.CONCLUSION:Short-term outcomes favor intracorporeal anastomosis,confirming that a less traumatic surgical approach improves patient outcome.展开更多
【目的】CO_(2)捕集、利用与封存(Carbon Capture,Utilization and Storage,CCUS)因其可直接降低碳排放而备受关注,CO_(2)管道作为CCUS的重要环节,其建设呈现出快速发展趋势。为了保证CO_(2)管道系统建设与运行的整体安全,深入剖析管道...【目的】CO_(2)捕集、利用与封存(Carbon Capture,Utilization and Storage,CCUS)因其可直接降低碳排放而备受关注,CO_(2)管道作为CCUS的重要环节,其建设呈现出快速发展趋势。为了保证CO_(2)管道系统建设与运行的整体安全,深入剖析管道设计规范的相关规定尤为重要。【方法】深入调研了国内外CO_(2)管道主要标准的发展历史及现状,重点分析了CO_(2)管道设计中管道材料选择、CO_(2)脱水、阀室设置、管道放空、管道干燥封存等方面的要点及其需要注意的问题。【结果】基于CO_(2)自身的特殊性质,管道材料的选择应与CO_(2)的输送相态相适应,且能够承受管道减压过程中可能发生的低温影响;CO_(2)管道阀室间距、位置的设置应与管道路由、泄压放空设施的位置等相结合,对各环节进行统筹考虑;密相/超临界CO_(2)泄压及放空会带来低温、地势低洼处聚集等问题,为防止对人员健康及环境造成威胁,CO_(2)管道路由选择应避免通过人口密集区的高地势侧;内腐蚀是CO_(2)管道主要失效形式之一,其主要控制手段为对CO_(2)气源进行充分脱水;由于CO_(2)溶于水的弱酸性质及易形成水合物的特点,对干燥过程中控制管内水气的要求较严格;如果管道不能立即投产,建议对管道注入干燥氮气,并采取0.05~0.07 MPa(表压)的微正压封存。【结论】中国CO_(2)管道标准的制定正处于起步阶段,应借鉴国外众多成熟标准的规定,尤其亟需开展CO_(2)管道泄漏试验研究,以获得更多数据支撑,为中国CO_(2)管道的设计、建设及规范制订提供借鉴。(图3,表4,参22)展开更多
In this article, we derive the explicit entanglement and fidelity expressions for a larger class of two-qubit states, namely, a seven-parameter family of so ca^led X-states. The ana/ytical expressions of the entanglem...In this article, we derive the explicit entanglement and fidelity expressions for a larger class of two-qubit states, namely, a seven-parameter family of so ca^led X-states. The ana/ytical expressions of the entanglement, the output entanglement and the average fidelity are obtained for this genera/model by using the concept of concurrence and average fidelity. We study the relations between quantum entanglement, the output entanglement, and the average fidelity for standard teleportation of one-qubit and partial teleportation of two-qubit state. We discover that the average fidelity and entanglement is not a simple dependence relation. The higher entangled system is helpful for teleportation.展开更多
文摘AIM:To study the short-term outcome of patients treated with laparoscopic right colectomy and how intracorporeal anastomosis has improved the outcome.METHODS:We retrospectively examined all patients affected by colorectal cancer who underwent a laparoscopic right colectomy between January 2006 and December 2010 in our department.Our evaluation criteria were:diagnosis of colorectal carcinoma at presurgical biopsy,elective surgery,and the same surgeon.We excluded:emergency surgery,conversions from laparotomic colectomy,and other surgeons.The endpoints we examined were:surgical time,number of lymph nodes removed,length of stay(removal of nasogastric tube,bowel movements,gas evacuation,solid and liquid feeding,hospitalization),and major complications.Seventy-two patients were divided into two groups:intracorporeal anastomosis(39 patients)and extracorporeal anastomosis(33 patients).RESULTS:Significant differences were observed between intracorporeal vs extracorporeal anastomosis,respectively,for surgical times(186.8 min vs 184.1 min,P < 0.001),time to resumption of gas evacuation(3 d vs 3.5 d,P < 0.001),days until resumption of bowel movements(3.8 d vs 4.9 d,P < 0.001),days until resumption of liquid diet(3.5 d vs 4.5 d,P < 0.001),days until resuming a solid diet(4.6 d vs 5.7 d,P < 0.001),and total hospitalization duration(7.4 d vs 8.5 d,P < 0.001).In the intracorporeal group,on average,19 positive lymph nodes were removed;in the extracorporeal group,on average,14 were removed P < 0.001).Thus,intracorporeal anastomosis for right laparoscopic colectomy improved patient outcome by providing faster recovery of nutrition,faster recovery of intestinal function,and shorter hospitalization than extracorporeal anastomosis.CONCLUSION:Short-term outcomes favor intracorporeal anastomosis,confirming that a less traumatic surgical approach improves patient outcome.
文摘【目的】CO_(2)捕集、利用与封存(Carbon Capture,Utilization and Storage,CCUS)因其可直接降低碳排放而备受关注,CO_(2)管道作为CCUS的重要环节,其建设呈现出快速发展趋势。为了保证CO_(2)管道系统建设与运行的整体安全,深入剖析管道设计规范的相关规定尤为重要。【方法】深入调研了国内外CO_(2)管道主要标准的发展历史及现状,重点分析了CO_(2)管道设计中管道材料选择、CO_(2)脱水、阀室设置、管道放空、管道干燥封存等方面的要点及其需要注意的问题。【结果】基于CO_(2)自身的特殊性质,管道材料的选择应与CO_(2)的输送相态相适应,且能够承受管道减压过程中可能发生的低温影响;CO_(2)管道阀室间距、位置的设置应与管道路由、泄压放空设施的位置等相结合,对各环节进行统筹考虑;密相/超临界CO_(2)泄压及放空会带来低温、地势低洼处聚集等问题,为防止对人员健康及环境造成威胁,CO_(2)管道路由选择应避免通过人口密集区的高地势侧;内腐蚀是CO_(2)管道主要失效形式之一,其主要控制手段为对CO_(2)气源进行充分脱水;由于CO_(2)溶于水的弱酸性质及易形成水合物的特点,对干燥过程中控制管内水气的要求较严格;如果管道不能立即投产,建议对管道注入干燥氮气,并采取0.05~0.07 MPa(表压)的微正压封存。【结论】中国CO_(2)管道标准的制定正处于起步阶段,应借鉴国外众多成熟标准的规定,尤其亟需开展CO_(2)管道泄漏试验研究,以获得更多数据支撑,为中国CO_(2)管道的设计、建设及规范制订提供借鉴。(图3,表4,参22)
基金Supported by the Youth Foundation of Institute of Science under Grant Nos. QN-SL-2010-01,QN-SL-2010-10Pre-Research Foundation of PLA University of Science and Technology under Grant Nos. 20110515 and 20110101
文摘In this article, we derive the explicit entanglement and fidelity expressions for a larger class of two-qubit states, namely, a seven-parameter family of so ca^led X-states. The ana/ytical expressions of the entanglement, the output entanglement and the average fidelity are obtained for this genera/model by using the concept of concurrence and average fidelity. We study the relations between quantum entanglement, the output entanglement, and the average fidelity for standard teleportation of one-qubit and partial teleportation of two-qubit state. We discover that the average fidelity and entanglement is not a simple dependence relation. The higher entangled system is helpful for teleportation.
