This report details the CT and MR imaging findings of a primary orbital Ewing＇s sarcoma case involving the middle cranial fossa in a 13-year old boy. CT showed an ill-circumscribed homogeneous soft-tissue density mas...This report details the CT and MR imaging findings of a primary orbital Ewing＇s sarcoma case involving the middle cranial fossa in a 13-year old boy. CT showed an ill-circumscribed homogeneous soft-tissue density mass with needle-like bone reaction. On MRI, the mass showed homogeneous iso-intensity on T1WI, heterogeneous hyper- intensity on T2WI, and marked homogeneous enhancement. Meanwhile, the mass was hyper-intense on DWI, and ADC alue was 575x10-6 mm2/s. The mass showed as high rCBV and rCBF, prolonged MTT based on DCS- PWI, and wash-out pattern of TIC derived from the DCE-MRI. Our case suggests that functional MRI modalities, including DWI, DSC-PWI or DCE-MR, could provide additional information for differential diagnoses. Both CT and MRI should be performed and comprehensively analyzed for limiting differential diagnoses, determining lesion extension and facilitating operative approach.展开更多
In the cyber-physical environment,the clock synchronization algorithm is required to have better expansion for network scale.In this paper,a new measurement model of observability under the equivalent transformation o...In the cyber-physical environment,the clock synchronization algorithm is required to have better expansion for network scale.In this paper,a new measurement model of observability under the equivalent transformation of minimum mean square error(MMSE)is constructed based on basic measurement unit(BMU),which can realize the scaled expansion of MMSE measurement.Based on the state updating equation of absolute clock and the decoupled measurement model of MMSElike equivalence,which is proposed to calculate the positive definite invariant set by using the theoretical-practical Luenberger observer as the synthetical observer,the local noncooperative optimal control problem is built,and the clock synchronization system driven by the ideal state of local clock can reach the exponential convergence for synchronization performance.Different from the problem of general linear system regulators,the state estimation error and state control error are analyzed in the established affine system based on the set-theoryin-control to achieve the quantification of state deviation caused by noise interference.Based on the BMU for isomorphic state map,the synchronization performance of clock states between multiple sets of representative nodes is evaluated,and the scale of evaluated system can be still expanded.After the synchronization is completed,the state of perturbation system remains in the maximum range of measurement accuracy,and the state of nominal system can be stabilized at the ideal state for local clock and realizes the exponential convergence of the clock synchronization system.展开更多
Alveolar soft part sarcoma（ASPS）of the orbit is exceedingly rare and little is known regarding its radiologic features.Here,we reviewed the CT and MRI findings of one case of ASPS of the orbit with emphasis on its s...Alveolar soft part sarcoma（ASPS）of the orbit is exceedingly rare and little is known regarding its radiologic features.Here,we reviewed the CT and MRI findings of one case of ASPS of the orbit with emphasis on its salient imaging features.展开更多
The concepts of hypercontinuous posets and generalized completely continuous posets are introduced. It is proved that for a poset P the following three conditions are equivalent:(1) P is hypercontinuous;(2) the dual o...The concepts of hypercontinuous posets and generalized completely continuous posets are introduced. It is proved that for a poset P the following three conditions are equivalent:(1) P is hypercontinuous;(2) the dual of P is generalized completely continuous;(3) the normal completion of P is a hypercontinuous lattice. In addition, the relational representation and the intrinsic characterization of hypercontinuous posets are obtained.展开更多
文摘This report details the CT and MR imaging findings of a primary orbital Ewing＇s sarcoma case involving the middle cranial fossa in a 13-year old boy. CT showed an ill-circumscribed homogeneous soft-tissue density mass with needle-like bone reaction. On MRI, the mass showed homogeneous iso-intensity on T1WI, heterogeneous hyper- intensity on T2WI, and marked homogeneous enhancement. Meanwhile, the mass was hyper-intense on DWI, and ADC alue was 575x10-6 mm2/s. The mass showed as high rCBV and rCBF, prolonged MTT based on DCS- PWI, and wash-out pattern of TIC derived from the DCE-MRI. Our case suggests that functional MRI modalities, including DWI, DSC-PWI or DCE-MR, could provide additional information for differential diagnoses. Both CT and MRI should be performed and comprehensively analyzed for limiting differential diagnoses, determining lesion extension and facilitating operative approach.
基金supported by the National Natural Science Foundation of China(61972061,61403055,51705059,51605065)the Chongqing Science and Technology Commission(2017jcyjAX0453,cstc2018jcyjAX0691,cstc2018jcyjAX0139)+2 种基金the Scientific and Technological Research Program of Chongqing Municipal Education Commission(KJQN201800645)the Science and Technology Research Program of Chongqing Municipal Education Commission(KJZD-K201900604)the Chongqing Education Administration Program Foundation of China(KJ1600402)。
文摘In the cyber-physical environment,the clock synchronization algorithm is required to have better expansion for network scale.In this paper,a new measurement model of observability under the equivalent transformation of minimum mean square error(MMSE)is constructed based on basic measurement unit(BMU),which can realize the scaled expansion of MMSE measurement.Based on the state updating equation of absolute clock and the decoupled measurement model of MMSElike equivalence,which is proposed to calculate the positive definite invariant set by using the theoretical-practical Luenberger observer as the synthetical observer,the local noncooperative optimal control problem is built,and the clock synchronization system driven by the ideal state of local clock can reach the exponential convergence for synchronization performance.Different from the problem of general linear system regulators,the state estimation error and state control error are analyzed in the established affine system based on the set-theoryin-control to achieve the quantification of state deviation caused by noise interference.Based on the BMU for isomorphic state map,the synchronization performance of clock states between multiple sets of representative nodes is evaluated,and the scale of evaluated system can be still expanded.After the synchronization is completed,the state of perturbation system remains in the maximum range of measurement accuracy,and the state of nominal system can be stabilized at the ideal state for local clock and realizes the exponential convergence of the clock synchronization system.
文摘Alveolar soft part sarcoma（ASPS）of the orbit is exceedingly rare and little is known regarding its radiologic features.Here,we reviewed the CT and MRI findings of one case of ASPS of the orbit with emphasis on its salient imaging features.
基金supported by the National Natural Science Foundation of China(Nos.10861007,11161023)the National Excellent Doctoral Dissertation of China(No.2007B14)+1 种基金the Ganpo 555 Programme for Leading Talents of Jiangxi Province,the Natural Science Foundation of Jiangxi Province(No.20114BAB201008)the Fund of Education Department of Jiangxi Province(No.GJJ12657)
文摘The concepts of hypercontinuous posets and generalized completely continuous posets are introduced. It is proved that for a poset P the following three conditions are equivalent:(1) P is hypercontinuous;(2) the dual of P is generalized completely continuous;(3) the normal completion of P is a hypercontinuous lattice. In addition, the relational representation and the intrinsic characterization of hypercontinuous posets are obtained.
