为了解决因孤立时空约束而导致的多项任务指派的协同失效和全局优化性能急剧下降问题,使用角色协同理论(role-based collaboration)及其通用模型E-CARGO的子模型群组角色指派(group role assignment),以机场登机口调度为例,对问题进行...为了解决因孤立时空约束而导致的多项任务指派的协同失效和全局优化性能急剧下降问题,使用角色协同理论(role-based collaboration)及其通用模型E-CARGO的子模型群组角色指派(group role assignment),以机场登机口调度为例,对问题进行指派时空约束形式化建模;分析不同代理承担不同角色、不同代理承担同个角色的协作情况,从而建立量化评估矩阵与协作矩阵;继而对时空约束进行解耦与消解,采用整数规划在追求协作空间利用率最大化的同时,考虑平衡旅客偏好,对问题进行多目标求解。大规模仿真实验论证了模型与方法的一般性、有效性和可靠性。此外,与传统GRA模型相比,主体利益指标提升6.21%,客体偏好指标提升9.72%,实现秒级求解,满足了复杂时空网络下的任务分配快速指派响应要求。展开更多
该文在讨论了当前应用系统在访问控制上所面临的问题、访问控制方面的技术背景之后,提出了一种改进的基于角色访问权限管理的扩展模型GTRBAC(Group and Temporal Role-based Access Control Model),该模型不仅增强了RBAC部门管理的能力...该文在讨论了当前应用系统在访问控制上所面临的问题、访问控制方面的技术背景之后,提出了一种改进的基于角色访问权限管理的扩展模型GTRBAC(Group and Temporal Role-based Access Control Model),该模型不仅增强了RBAC部门管理的能力,而且增加了对工作时序要求的支持。展开更多
基于角色的协同RBC(Role-Based Collaboration)是一套研究角色及它们之间复杂关系的方法、理论和技术。在RBC中,群组角色分配GRA(Group Role Assignment)既是一个关键问题,也是一个难题。已有许多研究探讨了基于Q(Qualification)矩阵来...基于角色的协同RBC(Role-Based Collaboration)是一套研究角色及它们之间复杂关系的方法、理论和技术。在RBC中,群组角色分配GRA(Group Role Assignment)既是一个关键问题,也是一个难题。已有许多研究探讨了基于Q(Qualification)矩阵来处理GRA问题,但仅利用Q矩阵难以描述问题中的复杂约束关系。因此,将约束集(Constraint)引进E-CARGO模型,提出了带约束的EC-CARGO模型,研究了RBC、GRA、SAT(SATisfaction)和CSP(Constraint Satisfaction Problem)之间的联系,建立了RBC-GRA-SAT-CSP问题求解转换关系;提出应用EC-CARGO模型求解经典CSP约束满足问题的方法,进而描述了应用GRA求解CSP约束满足问题的通用框架。最后以N皇后问题为例,验证了通过GRA的约束指派求解CSP问题的有效性。展开更多
This paper analyzes the language employed in the representations of women in Doukhobor Russian ritual texts called ＂ncanMbf＇ （psalms） from the viewpoint of linguistic text analysis performed in the Russian traditi...This paper analyzes the language employed in the representations of women in Doukhobor Russian ritual texts called ＂ncanMbf＇ （psalms） from the viewpoint of linguistic text analysis performed in the Russian tradition of folklore stylistics. While addressing the representations of Biblical female characters, such as the Holy Virgin Mary Magdalene, the Heavenly Bride, and the Whore of Babylon, along with the portrayals of Doukhobor and other women, the paper identifies stylistic features in their textual descriptions. The study establishes connections between Doukhobor texts and Russian folklore and liturgical tradition. The paper strives to identify the place of Doukhobor psalms as an integral part of the Russian literary and folklore heritage展开更多
Extrathoracic solitary fibrous tumors(SFTs) have been described at almost every anatomic location of human body,but reports of SFT in the abdominal cavity are rare.We herein present a rare case of SFT originating from...Extrathoracic solitary fibrous tumors(SFTs) have been described at almost every anatomic location of human body,but reports of SFT in the abdominal cavity are rare.We herein present a rare case of SFT originating from greater omentum.Computed tomography revealed a 15.8 cm × 21.0 cm solid mass located at superior aspect of stomach.Open laparotomy confirmed its mesenchymal origin.Microscopically,its tissue was composed of non-organized and spindle-shaped cells exhibiting atypical nuclei,which were divided up by branching vessel and collagen bundles.Immunohistochemical staining showed that this tumor was negative for CD117,CD99,CD68,cytokeratin,calretinin,desmin,epithelial membrane antigen,F8 and S-100,but positive for CD34,bcl-2,α-smooth muscle actin and vimentin.The patient presented no evidence of recurrence during follow-up.SFT arising from abdominal cavity can be diagnosed by histological findings and immunohistochemical markers,especially for CD34 and bcl-2 positive cases.展开更多
Objective： The purpose of this study was to study the clinical, imaging characters and pathological characteristics of esophageal sarcomatoid carcinoma. Methods： We reviewed 23 cases of esophageal sarcomatoid carcin...Objective： The purpose of this study was to study the clinical, imaging characters and pathological characteristics of esophageal sarcomatoid carcinoma. Methods： We reviewed 23 cases of esophageal sarcomatoid carcinoma from Janu ary 2006 to December 2013 in four hospitals. The data of patients who were esophageal sarcomatoid carcinoma operated were retrospectively analyzed. All cases had completed upper gastrointestinal barium images materials and 14 of these cases had completed CT images materials. Upper gastrointestinal barium images and CT imaging features include tumor location, size, shape, and strengthen, etc. The biological parameters of lesions including the express of cytokeratin AE1/AE3, 34E12,, Vimentin, desmin, Actin, S100 and Ki67 detected by immunhistochemical UltraSensitiveTM SP method （n = 23）, and the patients＇ data of contrastographic picture （n = 23）, imaging characters of CT scan （n = 14）, and their relationship were studied. Results： Upper gastrointestinal barium images, CT imaging and gastrointestinal fiberscopy revealed Iobulated intraluminal filling defect 0.4 cm to 5.7 cm x 3.5 cmx 1.3 cm （mean = 3. 7 cm） in the mid （n = 14）, lower （n = 7） and upper （n = 2） intrathoracic esophagus. Among 23 cases of esophageal sarcomatoid carcinoma, 19 patients were of mushroom type, 2 patients was of ulcer type, and 2 patients were of medulla type; 19 patients were pedunculated, and 4 patients were no pedunculated （2 patients was of ulcer type）. The tumor surface was relatively smooth and esophageal compliance was maintained. The pathological changes of esophagus such as lightly locked, rigid wall nomanifest partly, esophageal lumens expand partly, major filling sublobe defect could be shown through contrast medium. Normal esophagus was no unpack obviously over pathological changes. Enhanced computed tomography showed tumors in the intrathoracic esophagus and 8 lymph nodes metastases in 3 cases. Histologically, carcinomatous and sarcomatous components coexist. Microscopically, the tumor comprised poorly differentiated squamous cell carcinoma and spindleshaped cells resembling leiomyosarcoma. Immu nohistochemically, spindleshaped sarcomatous cells displayed weekly positive reaction to cytokeratin AE1/AE3. Transitional zone was seen between sarcomatous and carcinomatous elements in 5 cases. The 17 lymph nodes metastases in 5 cases （53 lymph nodes） among 23 cases esophageal sarcomatoid carcinoma （187 lymph nodes） were observed. Conclusion： The clinical and radiologic features of esophageal sarcomatoid carcinoma overlap with those of other esophageal neoplasms. There are the radiologic imaging changes such as a large, intraluminal, polypoid mass, major filling sublobe defect and pedicle skin flap tumor in esophageal lumen, esophageal lumen extension partly, dissepiment rigidity wall no obviously, etc. Histologically, carcinomatous and sarcomatous components coexist and the biphasic pattern is the key diagnostic feature. However, esophageal sarcomatoid carcinoma has a more favorable prognosis than other malignant esophageal neoplasms. Immunohistochemical staining seems necessary to distinguish these lesions from other esophageal neoplasms.展开更多
文摘为了解决因孤立时空约束而导致的多项任务指派的协同失效和全局优化性能急剧下降问题,使用角色协同理论(role-based collaboration)及其通用模型E-CARGO的子模型群组角色指派(group role assignment),以机场登机口调度为例,对问题进行指派时空约束形式化建模;分析不同代理承担不同角色、不同代理承担同个角色的协作情况,从而建立量化评估矩阵与协作矩阵;继而对时空约束进行解耦与消解,采用整数规划在追求协作空间利用率最大化的同时,考虑平衡旅客偏好,对问题进行多目标求解。大规模仿真实验论证了模型与方法的一般性、有效性和可靠性。此外,与传统GRA模型相比,主体利益指标提升6.21%,客体偏好指标提升9.72%,实现秒级求解,满足了复杂时空网络下的任务分配快速指派响应要求。
文摘该文在讨论了当前应用系统在访问控制上所面临的问题、访问控制方面的技术背景之后,提出了一种改进的基于角色访问权限管理的扩展模型GTRBAC(Group and Temporal Role-based Access Control Model),该模型不仅增强了RBAC部门管理的能力,而且增加了对工作时序要求的支持。
文摘This paper analyzes the language employed in the representations of women in Doukhobor Russian ritual texts called ＂ncanMbf＇ （psalms） from the viewpoint of linguistic text analysis performed in the Russian tradition of folklore stylistics. While addressing the representations of Biblical female characters, such as the Holy Virgin Mary Magdalene, the Heavenly Bride, and the Whore of Babylon, along with the portrayals of Doukhobor and other women, the paper identifies stylistic features in their textual descriptions. The study establishes connections between Doukhobor texts and Russian folklore and liturgical tradition. The paper strives to identify the place of Doukhobor psalms as an integral part of the Russian literary and folklore heritage
文摘Extrathoracic solitary fibrous tumors(SFTs) have been described at almost every anatomic location of human body,but reports of SFT in the abdominal cavity are rare.We herein present a rare case of SFT originating from greater omentum.Computed tomography revealed a 15.8 cm × 21.0 cm solid mass located at superior aspect of stomach.Open laparotomy confirmed its mesenchymal origin.Microscopically,its tissue was composed of non-organized and spindle-shaped cells exhibiting atypical nuclei,which were divided up by branching vessel and collagen bundles.Immunohistochemical staining showed that this tumor was negative for CD117,CD99,CD68,cytokeratin,calretinin,desmin,epithelial membrane antigen,F8 and S-100,but positive for CD34,bcl-2,α-smooth muscle actin and vimentin.The patient presented no evidence of recurrence during follow-up.SFT arising from abdominal cavity can be diagnosed by histological findings and immunohistochemical markers,especially for CD34 and bcl-2 positive cases.
文摘Objective： The purpose of this study was to study the clinical, imaging characters and pathological characteristics of esophageal sarcomatoid carcinoma. Methods： We reviewed 23 cases of esophageal sarcomatoid carcinoma from Janu ary 2006 to December 2013 in four hospitals. The data of patients who were esophageal sarcomatoid carcinoma operated were retrospectively analyzed. All cases had completed upper gastrointestinal barium images materials and 14 of these cases had completed CT images materials. Upper gastrointestinal barium images and CT imaging features include tumor location, size, shape, and strengthen, etc. The biological parameters of lesions including the express of cytokeratin AE1/AE3, 34E12,, Vimentin, desmin, Actin, S100 and Ki67 detected by immunhistochemical UltraSensitiveTM SP method （n = 23）, and the patients＇ data of contrastographic picture （n = 23）, imaging characters of CT scan （n = 14）, and their relationship were studied. Results： Upper gastrointestinal barium images, CT imaging and gastrointestinal fiberscopy revealed Iobulated intraluminal filling defect 0.4 cm to 5.7 cm x 3.5 cmx 1.3 cm （mean = 3. 7 cm） in the mid （n = 14）, lower （n = 7） and upper （n = 2） intrathoracic esophagus. Among 23 cases of esophageal sarcomatoid carcinoma, 19 patients were of mushroom type, 2 patients was of ulcer type, and 2 patients were of medulla type; 19 patients were pedunculated, and 4 patients were no pedunculated （2 patients was of ulcer type）. The tumor surface was relatively smooth and esophageal compliance was maintained. The pathological changes of esophagus such as lightly locked, rigid wall nomanifest partly, esophageal lumens expand partly, major filling sublobe defect could be shown through contrast medium. Normal esophagus was no unpack obviously over pathological changes. Enhanced computed tomography showed tumors in the intrathoracic esophagus and 8 lymph nodes metastases in 3 cases. Histologically, carcinomatous and sarcomatous components coexist. Microscopically, the tumor comprised poorly differentiated squamous cell carcinoma and spindleshaped cells resembling leiomyosarcoma. Immu nohistochemically, spindleshaped sarcomatous cells displayed weekly positive reaction to cytokeratin AE1/AE3. Transitional zone was seen between sarcomatous and carcinomatous elements in 5 cases. The 17 lymph nodes metastases in 5 cases （53 lymph nodes） among 23 cases esophageal sarcomatoid carcinoma （187 lymph nodes） were observed. Conclusion： The clinical and radiologic features of esophageal sarcomatoid carcinoma overlap with those of other esophageal neoplasms. There are the radiologic imaging changes such as a large, intraluminal, polypoid mass, major filling sublobe defect and pedicle skin flap tumor in esophageal lumen, esophageal lumen extension partly, dissepiment rigidity wall no obviously, etc. Histologically, carcinomatous and sarcomatous components coexist and the biphasic pattern is the key diagnostic feature. However, esophageal sarcomatoid carcinoma has a more favorable prognosis than other malignant esophageal neoplasms. Immunohistochemical staining seems necessary to distinguish these lesions from other esophageal neoplasms.
