With the challenges brought by the expansion of network scale,as well as the diversity of the equipments and the complexity of network protocols,many self-configurable systems have been proposed combining formal speci...With the challenges brought by the expansion of network scale,as well as the diversity of the equipments and the complexity of network protocols,many self-configurable systems have been proposed combining formal specification and model finding techniques.In this paper,we pay more attention to formal specifications of network information,i.e.,exploring principles and algorithm to map network information(topology,devices and status,etc.) to Alloy specifications.We first model network information in relational form,which is easy to realize because of the structured feature of network information in nature.Then we map the relational data to Alloy specifications according to our novel data mapping principles and algorithm.Based on the transition of relational data,it is possible to automatically map network information to Alloy specifications.We evaluate our data mapping principles and algorithm by applying them to a practical application scenario.The results illustrate that we can find a model for the task within a tolerant time interval,which implies that our novel approach can convert relational data to Alloy specifications correctly and efficiently.展开更多
目的对比主动控制液流系统和重力控制液流系统在硬核白内障超声乳化手术术中效率以及术后早期角膜水肿程度、中央角膜厚度变化、视力恢复的差异。方法纳入2020年1月至2020年12月就诊于本院眼科,且晶状体核硬度按照LOCSⅡ分级系统均属N...目的对比主动控制液流系统和重力控制液流系统在硬核白内障超声乳化手术术中效率以及术后早期角膜水肿程度、中央角膜厚度变化、视力恢复的差异。方法纳入2020年1月至2020年12月就诊于本院眼科,且晶状体核硬度按照LOCSⅡ分级系统均属NⅣ级的年龄相关性白内障患者60例(60眼),按照随机数字表法将患者分成主动控制液流系统组(主控组)及重力控制液流系统组(重力组)。主控组:术中应用主动控制液流系统行白内障超声乳化吸除联合人工晶体植入手术30例(30眼);重力组:术中应用重力控制液流系统行白内障超声乳化吸除联合人工晶体植入手术30例(30眼)。记录每例患者术中所用累计释放能量(cumulative dissipated energy, CDE)、总超声乳化时间(ultrasound total time, UTT)、扭动能量振幅(torsional amplitude, TA)、扭动超声使用时间(torsion use time, TUT)、抽吸时间(aspiration time, AT)、液流使用量(fluid use, FU)。术后评价指标包括术后第1天裸眼远视力、中央角膜水肿程度及中央角膜厚度(central corneal thickness, CCT)。结果术前两组患者的最佳矫正远视力、中央角膜厚度、角膜内皮细胞计数组间差异均无统计学意义。主控组的CDE、UTT、TUT、AT、FU均显著少于重力组(P<0.05),而两组之间TA差异无统计学意义。术后1 d两组病例CCT差异均无统计学意义。主控组裸眼远视力显著优于重力组(P=0.005)。术后1 d主控组CCT增加幅度显著低于重力组(P=0.006),主控组中央角膜水肿程度显著低于重力组(P<0.001),主控组中重度中央角膜水肿患者比例显著低于重力组(P<0.001)。结论主动控制液流系统相对于传统重力系统对硬核白内障患者具有更高的超声乳化手术效率,患者术后早期角膜水肿程度更轻,角膜厚度变化更小,术后早期视力恢复更快。展开更多
基金supported by the National Science Foundation for Distinguished Young Scholars of China under Grant No.61225012 and No.71325002the Specialized Research Fund of the Doctoral Program of Higher Education for the Priority Development Areas under Grant No.20120042130003the Liaoning BaiQianWan Talents Program under Grant No.2013921068
文摘With the challenges brought by the expansion of network scale,as well as the diversity of the equipments and the complexity of network protocols,many self-configurable systems have been proposed combining formal specification and model finding techniques.In this paper,we pay more attention to formal specifications of network information,i.e.,exploring principles and algorithm to map network information(topology,devices and status,etc.) to Alloy specifications.We first model network information in relational form,which is easy to realize because of the structured feature of network information in nature.Then we map the relational data to Alloy specifications according to our novel data mapping principles and algorithm.Based on the transition of relational data,it is possible to automatically map network information to Alloy specifications.We evaluate our data mapping principles and algorithm by applying them to a practical application scenario.The results illustrate that we can find a model for the task within a tolerant time interval,which implies that our novel approach can convert relational data to Alloy specifications correctly and efficiently.
文摘目的对比主动控制液流系统和重力控制液流系统在硬核白内障超声乳化手术术中效率以及术后早期角膜水肿程度、中央角膜厚度变化、视力恢复的差异。方法纳入2020年1月至2020年12月就诊于本院眼科,且晶状体核硬度按照LOCSⅡ分级系统均属NⅣ级的年龄相关性白内障患者60例(60眼),按照随机数字表法将患者分成主动控制液流系统组(主控组)及重力控制液流系统组(重力组)。主控组:术中应用主动控制液流系统行白内障超声乳化吸除联合人工晶体植入手术30例(30眼);重力组:术中应用重力控制液流系统行白内障超声乳化吸除联合人工晶体植入手术30例(30眼)。记录每例患者术中所用累计释放能量(cumulative dissipated energy, CDE)、总超声乳化时间(ultrasound total time, UTT)、扭动能量振幅(torsional amplitude, TA)、扭动超声使用时间(torsion use time, TUT)、抽吸时间(aspiration time, AT)、液流使用量(fluid use, FU)。术后评价指标包括术后第1天裸眼远视力、中央角膜水肿程度及中央角膜厚度(central corneal thickness, CCT)。结果术前两组患者的最佳矫正远视力、中央角膜厚度、角膜内皮细胞计数组间差异均无统计学意义。主控组的CDE、UTT、TUT、AT、FU均显著少于重力组(P<0.05),而两组之间TA差异无统计学意义。术后1 d两组病例CCT差异均无统计学意义。主控组裸眼远视力显著优于重力组(P=0.005)。术后1 d主控组CCT增加幅度显著低于重力组(P=0.006),主控组中央角膜水肿程度显著低于重力组(P<0.001),主控组中重度中央角膜水肿患者比例显著低于重力组(P<0.001)。结论主动控制液流系统相对于传统重力系统对硬核白内障患者具有更高的超声乳化手术效率,患者术后早期角膜水肿程度更轻,角膜厚度变化更小,术后早期视力恢复更快。
