With the improvement of our country's economy and people's living standard, tunnels and underground works have been further developed and popularized. Tunnel and underground engineering is a promising science ...With the improvement of our country's economy and people's living standard, tunnels and underground works have been further developed and popularized. Tunnel and underground engineering is a promising science to solve the traffic and industrial problems in our country. Taking the shield section from Yingrenshi Station to Luozu Station in the fourth work area of Shenzhen metro line 13 as an example, this paper expounds the application of the conductor layout method in the long section shield tunnel, which adopts the addition of a common edge between the main conductor and the auxiliary conductor to form a closed loop, compares and analyzes with the gyro directional data, and measures the penetration error after the tunnel is penetrated, so as to provide help for the layout of the long section shield tunnel control survey control network.展开更多
To fulfill the requirements for hybrid real-time system scheduling, a long-release-interval-first （LRIF） real-time scheduling algorithm is proposed. The algorithm adopts both the fixed priority and the dynamic prior...To fulfill the requirements for hybrid real-time system scheduling, a long-release-interval-first （LRIF） real-time scheduling algorithm is proposed. The algorithm adopts both the fixed priority and the dynamic priority to assign priorities for tasks. By assigning higher priorities to the aperiodic soft real-time jobs with longer release intervals, it guarantees the executions for periodic hard real-time tasks and further probabilistically guarantees the executions for aperiodic soft real-time tasks. The schedulability test approach for the LRIF algorithm is presented. The implementation issues of the LRIF algorithm are also discussed. Simulation result shows that LRIF obtains better schedulable performance than the maximum urgency first （MUF） algorithm, the earliest deadline first （EDF） algorithm and EDF for hybrid tasks. LRIF has great capability to schedule both periodic hard real-time and aperiodic soft real-time tasks.展开更多
Dear Sir,Iam Dr.Ye Zhang,from Beijing Tongren Eye Center,Beijing Tongren Hospital,Beijing,China.I write to present a case report of bilateral retinoblastoma(Rb)with10-year-interval of onsets.Rb is the most common mali...Dear Sir,Iam Dr.Ye Zhang,from Beijing Tongren Eye Center,Beijing Tongren Hospital,Beijing,China.I write to present a case report of bilateral retinoblastoma(Rb)with10-year-interval of onsets.Rb is the most common malignant intraocular tumor of infancy and childhood,with the majority of cases being diagnosed before 5 years of age.It may involve in unilateral or bilateral eye.Studies showed that the interval of the onsets of bilateral Rb is always within three years.So it is very rare展开更多
AIM:To assess the effectiveness of core vitrectomyphacoemulsification-intraocular lens(IOL)implantationcapsulo-hyaloidotomy in treating phakic eye at least 1 mo after the onset of malignant glaucoma.METHODS:A retrospe...AIM:To assess the effectiveness of core vitrectomyphacoemulsification-intraocular lens(IOL)implantationcapsulo-hyaloidotomy in treating phakic eye at least 1 mo after the onset of malignant glaucoma.METHODS:A retrospective analysis were performed on malignant glaucoma patients treated in Zhongshan Ophthalmic Center between 2016 and 2018.Demographic and clinical data were described.The preoperative and postoperative visual acuity(VA),intraocular pressure(IOP),number of IOP-lowering medications used,and anterior chamber depth(ACD)of the case series were compared by Wilcoxon signed-rank test.RESULTS:Thirteen phakic eyes with long time intervals between onset and surgery were identified in this case series.Core vitrectomy-phacoemulsification-IOL implantation-capsulohyaloidotomy reduced the IOP(P=0.046)and the number of IOP-lowering medications used(P=0.004),deepened the ACD(P=0.005).Complete success was achieved in 38.5%of the eyes,and anatomical success was achieved in 100%of the eyes without any recurrence.The only postoperative complication observed is corneal endothelial decompensation.It occurred in two cases.CONCLUSION:Core vitrectomy-phacoemulsification-IOL implantation-capsulo-hyaloidotomy is safe and effective for treatment of long onset phakic malignant glaucoma.展开更多
文摘With the improvement of our country's economy and people's living standard, tunnels and underground works have been further developed and popularized. Tunnel and underground engineering is a promising science to solve the traffic and industrial problems in our country. Taking the shield section from Yingrenshi Station to Luozu Station in the fourth work area of Shenzhen metro line 13 as an example, this paper expounds the application of the conductor layout method in the long section shield tunnel, which adopts the addition of a common edge between the main conductor and the auxiliary conductor to form a closed loop, compares and analyzes with the gyro directional data, and measures the penetration error after the tunnel is penetrated, so as to provide help for the layout of the long section shield tunnel control survey control network.
基金The Natural Science Foundation of Jiangsu Province(NoBK2005408)
文摘To fulfill the requirements for hybrid real-time system scheduling, a long-release-interval-first （LRIF） real-time scheduling algorithm is proposed. The algorithm adopts both the fixed priority and the dynamic priority to assign priorities for tasks. By assigning higher priorities to the aperiodic soft real-time jobs with longer release intervals, it guarantees the executions for periodic hard real-time tasks and further probabilistically guarantees the executions for aperiodic soft real-time tasks. The schedulability test approach for the LRIF algorithm is presented. The implementation issues of the LRIF algorithm are also discussed. Simulation result shows that LRIF obtains better schedulable performance than the maximum urgency first （MUF） algorithm, the earliest deadline first （EDF） algorithm and EDF for hybrid tasks. LRIF has great capability to schedule both periodic hard real-time and aperiodic soft real-time tasks.
文摘Dear Sir,Iam Dr.Ye Zhang,from Beijing Tongren Eye Center,Beijing Tongren Hospital,Beijing,China.I write to present a case report of bilateral retinoblastoma(Rb)with10-year-interval of onsets.Rb is the most common malignant intraocular tumor of infancy and childhood,with the majority of cases being diagnosed before 5 years of age.It may involve in unilateral or bilateral eye.Studies showed that the interval of the onsets of bilateral Rb is always within three years.So it is very rare
基金Supported by the National Natural Science Foundation of China(No.81700812)。
文摘AIM:To assess the effectiveness of core vitrectomyphacoemulsification-intraocular lens(IOL)implantationcapsulo-hyaloidotomy in treating phakic eye at least 1 mo after the onset of malignant glaucoma.METHODS:A retrospective analysis were performed on malignant glaucoma patients treated in Zhongshan Ophthalmic Center between 2016 and 2018.Demographic and clinical data were described.The preoperative and postoperative visual acuity(VA),intraocular pressure(IOP),number of IOP-lowering medications used,and anterior chamber depth(ACD)of the case series were compared by Wilcoxon signed-rank test.RESULTS:Thirteen phakic eyes with long time intervals between onset and surgery were identified in this case series.Core vitrectomy-phacoemulsification-IOL implantation-capsulohyaloidotomy reduced the IOP(P=0.046)and the number of IOP-lowering medications used(P=0.004),deepened the ACD(P=0.005).Complete success was achieved in 38.5%of the eyes,and anatomical success was achieved in 100%of the eyes without any recurrence.The only postoperative complication observed is corneal endothelial decompensation.It occurred in two cases.CONCLUSION:Core vitrectomy-phacoemulsification-IOL implantation-capsulo-hyaloidotomy is safe and effective for treatment of long onset phakic malignant glaucoma.
