This paper is devoted to the assessment of ship maneuvering simulation using different propeller models with the focus on a simplified propeller model that represents the action of the propeller by body force and uses...This paper is devoted to the assessment of ship maneuvering simulation using different propeller models with the focus on a simplified propeller model that represents the action of the propeller by body force and uses propeller performance curve to determine propeller loading during ship maneuvering.Simulations are also performed with an actual propeller approach with which the propeller rotation is simulated directly with the Reynolds averaged Navier-Stokes equation(RANSE)solver.Both time accurate simulations using sliding grid and rotating frame approximations have been performed for comparison.The zigzag and turning circle maneuvers in calm water have been simulated for two different ship models,namely the ONR tumblehome(ONRT)test case and the KRISO(Korea Research Institute of Ship and Ocean)Container Ship(KCS)test case.Predicted ship motion is compared with measurement data to assess the accuracy of the numerical prediction using RANSE computations with different propeller models.展开更多
Since the introduction of complete mesocolic excision(CME) for colon cancer, the oncologic outcome of patients has been greatly improved, which has led to a longer survival and a lower recurrence, just like the total ...Since the introduction of complete mesocolic excision(CME) for colon cancer, the oncologic outcome of patients has been greatly improved, which has led to a longer survival and a lower recurrence, just like the total mesorectum excision for rectal cancer. Despite the fact that the exact anatomy of the organ is one of the most vital things for surgeons to conduct surgery, no team has really studied the exact structure of the mesocolon and related attachments for CME, until the mesocolonic anatomy was first formally characterized in 2012. Therefore, this article mainly focuses on the anatomy development of the mesocolon and the achievement in this field. Meanwhile, we introduce the latest progress in laparoscopic surgery for colon cancer achieved by our team.展开更多
全文分三部分:第一部分讨论比较方法中的一些问题,并通过比较揭示中国和西方/德国的史学研究中的不平等关系及其后果。第二部分,作者把1980年代以来中国史学研究中出现的社会史研究潮流称为“社会史转向”(Soc ialH istory Turn),分析...全文分三部分:第一部分讨论比较方法中的一些问题,并通过比较揭示中国和西方/德国的史学研究中的不平等关系及其后果。第二部分,作者把1980年代以来中国史学研究中出现的社会史研究潮流称为“社会史转向”(Soc ialH istory Turn),分析其特征并以其为例呈现中国史学研究在全球学术结构中的自我定位。第三部分,通过比较德国与中国社会史兴起过程中的异同来“构建他者”(to Construct the O ther)和“衡量差异”(toM easure the D ifference),从而指出占统治地位的线性发展和现代化模型是以统一的全球意识形态体系为基础的,并强调对其重新思考的必要性。展开更多
基金This work was made possible thanks to granted access to the HPC resources of CINES and IDRIS computing centers under the allocation A0072A01308 made by Grand Equipement National de Calcul Intensif(GENCI).
文摘This paper is devoted to the assessment of ship maneuvering simulation using different propeller models with the focus on a simplified propeller model that represents the action of the propeller by body force and uses propeller performance curve to determine propeller loading during ship maneuvering.Simulations are also performed with an actual propeller approach with which the propeller rotation is simulated directly with the Reynolds averaged Navier-Stokes equation(RANSE)solver.Both time accurate simulations using sliding grid and rotating frame approximations have been performed for comparison.The zigzag and turning circle maneuvers in calm water have been simulated for two different ship models,namely the ONR tumblehome(ONRT)test case and the KRISO(Korea Research Institute of Ship and Ocean)Container Ship(KCS)test case.Predicted ship motion is compared with measurement data to assess the accuracy of the numerical prediction using RANSE computations with different propeller models.
文摘Since the introduction of complete mesocolic excision(CME) for colon cancer, the oncologic outcome of patients has been greatly improved, which has led to a longer survival and a lower recurrence, just like the total mesorectum excision for rectal cancer. Despite the fact that the exact anatomy of the organ is one of the most vital things for surgeons to conduct surgery, no team has really studied the exact structure of the mesocolon and related attachments for CME, until the mesocolonic anatomy was first formally characterized in 2012. Therefore, this article mainly focuses on the anatomy development of the mesocolon and the achievement in this field. Meanwhile, we introduce the latest progress in laparoscopic surgery for colon cancer achieved by our team.
文摘全文分三部分:第一部分讨论比较方法中的一些问题,并通过比较揭示中国和西方/德国的史学研究中的不平等关系及其后果。第二部分,作者把1980年代以来中国史学研究中出现的社会史研究潮流称为“社会史转向”(Soc ialH istory Turn),分析其特征并以其为例呈现中国史学研究在全球学术结构中的自我定位。第三部分,通过比较德国与中国社会史兴起过程中的异同来“构建他者”(to Construct the O ther)和“衡量差异”(toM easure the D ifference),从而指出占统治地位的线性发展和现代化模型是以统一的全球意识形态体系为基础的,并强调对其重新思考的必要性。
