The Incomplete Orthogonalization Method (IOM(q)), a truncated version of the Full Orthogonalization Method (FOM) proposed by Saad, has been used for solving large unsymme- tric linear systmes. However, the IOM(q) exhi...The Incomplete Orthogonalization Method (IOM(q)), a truncated version of the Full Orthogonalization Method (FOM) proposed by Saad, has been used for solving large unsymme- tric linear systmes. However, the IOM(q) exhibites irregular convergence behavior with wild oscillation in the residual norms though it tends to decrease in a very slow manner, which is owing to the lack of minimization property over the Krylov subspace. QMR method proposed by Freund, Gutknecht and Nachtigal, owing to its ability to avoid breakdowns and smooth convergence behavior, is a robust iterative solver for general nonsingular unsymmetric linear systems. In this paper, we propose a novel quasi-minimal residual (QMR) variant of the Incomplete Orthogona- lization Method (IOM(q)). Numerical experiments show that it has smooth convergence behavior and is more effective, especially when using its restarted version.展开更多
Objective: To explore whether the 2007 IOM recommendations had an impact on the reasons for calls to a cancer telephone helpline and determine the major reasons for calls at two different time periods after the 2007 r...Objective: To explore whether the 2007 IOM recommendations had an impact on the reasons for calls to a cancer telephone helpline and determine the major reasons for calls at two different time periods after the 2007 recommendations. Methods: Caller data with identifiers removed were extracted from a cancer helpline database. Baseline data included calls made to the helpline between April 2, 2008 and September 2, 2009 (Period 1). Then, a second data set was built from data collected between September 3, 2009 and May 2, 2011 (Period 2). Results: The major reasons for calls to the cancer telephone helpline during the two different time periods were the same: financial assistance, helpline services information, coping assistance, support groups, and questions related to treatment. Four of the top five reasons were non-treatment related (i.e., financial issues, helpline services information, coping, and support). Conclusions: The nature of calls to the helpline suggests that the financial and psychosocial needs of people with cancer are not being addressed by healthcare providers. Practice implications: The new “normal” for cancer care includes decisions about complex care coupled with new regulatory and financial constraints. This underscores the importance of focused planning of cancer care across multiple care settings in order to ensure continuity of care for the whole person.展开更多
Objective To study the biomechanical mechanism of Essex-Lopresti injury,and provide biomechanical basis for diagnosis and treatment of Essex-Lopresti injury.Methods Twelve fresh frozen adult upper limbs were addressed...Objective To study the biomechanical mechanism of Essex-Lopresti injury,and provide biomechanical basis for diagnosis and treatment of Essex-Lopresti injury.Methods Twelve fresh frozen adult upper limbs were addressed.Firstly,12展开更多
本文旨在讨论智联网(Internet of minds,Io M)的基本概念,核心问题和关键平台技术.首先阐述智联网概念的智能时代发展需求和科学哲学思想基础,然后阐述智联网技术的背景、定义、实质,及其实现协同认知智能的目标,并举例说明其前沿应用领...本文旨在讨论智联网(Internet of minds,Io M)的基本概念,核心问题和关键平台技术.首先阐述智联网概念的智能时代发展需求和科学哲学思想基础,然后阐述智联网技术的背景、定义、实质,及其实现协同认知智能的目标,并举例说明其前沿应用领域,包括物理信息社会系统、软件定义系统及流程、工业智联网.接下来探讨智联网的核心问题:知识的获取、知识的协同表征和传递、以及知识的关联和协同运行.最后简单描述了智联网的关键平台技术,包括虚实平行的平台体系和基于互联网、物联网、区块链和软件定义网络的社会化通信计算平台,为分布式、自组织、自运行的安全智联网系统提供基础设施.展开更多
基金This work is supported by the National Natural Science Foundation of China and the Natural Science Foundation of Jiangsu Provinc
文摘The Incomplete Orthogonalization Method (IOM(q)), a truncated version of the Full Orthogonalization Method (FOM) proposed by Saad, has been used for solving large unsymme- tric linear systmes. However, the IOM(q) exhibites irregular convergence behavior with wild oscillation in the residual norms though it tends to decrease in a very slow manner, which is owing to the lack of minimization property over the Krylov subspace. QMR method proposed by Freund, Gutknecht and Nachtigal, owing to its ability to avoid breakdowns and smooth convergence behavior, is a robust iterative solver for general nonsingular unsymmetric linear systems. In this paper, we propose a novel quasi-minimal residual (QMR) variant of the Incomplete Orthogona- lization Method (IOM(q)). Numerical experiments show that it has smooth convergence behavior and is more effective, especially when using its restarted version.
文摘Objective: To explore whether the 2007 IOM recommendations had an impact on the reasons for calls to a cancer telephone helpline and determine the major reasons for calls at two different time periods after the 2007 recommendations. Methods: Caller data with identifiers removed were extracted from a cancer helpline database. Baseline data included calls made to the helpline between April 2, 2008 and September 2, 2009 (Period 1). Then, a second data set was built from data collected between September 3, 2009 and May 2, 2011 (Period 2). Results: The major reasons for calls to the cancer telephone helpline during the two different time periods were the same: financial assistance, helpline services information, coping assistance, support groups, and questions related to treatment. Four of the top five reasons were non-treatment related (i.e., financial issues, helpline services information, coping, and support). Conclusions: The nature of calls to the helpline suggests that the financial and psychosocial needs of people with cancer are not being addressed by healthcare providers. Practice implications: The new “normal” for cancer care includes decisions about complex care coupled with new regulatory and financial constraints. This underscores the importance of focused planning of cancer care across multiple care settings in order to ensure continuity of care for the whole person.
文摘Objective To study the biomechanical mechanism of Essex-Lopresti injury,and provide biomechanical basis for diagnosis and treatment of Essex-Lopresti injury.Methods Twelve fresh frozen adult upper limbs were addressed.Firstly,12
文摘本文旨在讨论智联网(Internet of minds,Io M)的基本概念,核心问题和关键平台技术.首先阐述智联网概念的智能时代发展需求和科学哲学思想基础,然后阐述智联网技术的背景、定义、实质,及其实现协同认知智能的目标,并举例说明其前沿应用领域,包括物理信息社会系统、软件定义系统及流程、工业智联网.接下来探讨智联网的核心问题:知识的获取、知识的协同表征和传递、以及知识的关联和协同运行.最后简单描述了智联网的关键平台技术,包括虚实平行的平台体系和基于互联网、物联网、区块链和软件定义网络的社会化通信计算平台,为分布式、自组织、自运行的安全智联网系统提供基础设施.
