随着生物医学工程学科的迅猛发展及其对介入放射学研究的深入,临床实践对介入设备提出了越来越高的要求;。且介入设备性能的提高可促使介入诊疗技术飞速提升,两者相辅相成;。为满足临床诊疗需求,我院于2018年底购置了一台西门子Artis On...随着生物医学工程学科的迅猛发展及其对介入放射学研究的深入,临床实践对介入设备提出了越来越高的要求;。且介入设备性能的提高可促使介入诊疗技术飞速提升,两者相辅相成;。为满足临床诊疗需求,我院于2018年底购置了一台西门子Artis One XA血管造影系统,现将设备使用中遇到的1例附件故障维修过程介绍如下,以供同行参考。展开更多
We consider a subclass of quantum Turing machines (QTM), named stationary rotational quantum Turing machine (SR-QTM), which halts deterministically and has deterministic tape head position. A quantum state transition ...We consider a subclass of quantum Turing machines (QTM), named stationary rotational quantum Turing machine (SR-QTM), which halts deterministically and has deterministic tape head position. A quantum state transition diagram (QSTD) is proposed to describe SR-QTM. With QSTD, we construct a SR-QTM which is universal for all near-trivial transformations. This indicates there exists a QTM which is universal for the above subclass. Finally we show that SR-QTM is computational equivalent with ordinary QTM in the bounded error setting. It can be seen that SR-QTMs have deterministic tape head position and halt deterministically, and thus the halting scheme problem will not exist for this class of QTMs.展开更多
文摘随着生物医学工程学科的迅猛发展及其对介入放射学研究的深入,临床实践对介入设备提出了越来越高的要求;。且介入设备性能的提高可促使介入诊疗技术飞速提升,两者相辅相成;。为满足临床诊疗需求,我院于2018年底购置了一台西门子Artis One XA血管造影系统,现将设备使用中遇到的1例附件故障维修过程介绍如下,以供同行参考。
基金supported by the National Natural Science Foundation of China (Grant No.61173157)the Strategy Pilot Project of Chinese Academy of Sciences (Grant No.project XDA06010702)IIE’s Cryptography Research Project
文摘We consider a subclass of quantum Turing machines (QTM), named stationary rotational quantum Turing machine (SR-QTM), which halts deterministically and has deterministic tape head position. A quantum state transition diagram (QSTD) is proposed to describe SR-QTM. With QSTD, we construct a SR-QTM which is universal for all near-trivial transformations. This indicates there exists a QTM which is universal for the above subclass. Finally we show that SR-QTM is computational equivalent with ordinary QTM in the bounded error setting. It can be seen that SR-QTMs have deterministic tape head position and halt deterministically, and thus the halting scheme problem will not exist for this class of QTMs.
