This paper presents a lightweight framework for executing many independent tasks efficiently on grids of heterogeneous computational nodes. It dynamically groups tasks of different granularities and dispatches the gro...
详细信息
ISBN:
(纸本)9781424428724
This paper presents a lightweight framework for executing many independent tasks efficiently on grids of heterogeneous computational nodes. It dynamically groups tasks of different granularities and dispatches the groups onto distributed computational resources concurrently. Three strategies have been devised to improve the efficiency of computation and resource utilization. One strategy is to pack up to thousands of tasks into one request. Another is to share the effort in resource discovery and allocation among requests by separating resource allocations from request submissions. The third strategy is to pack variable numbers of tasks into different requests, where the task number is a function of the destination resource's computability. This framework has been implemented in Gracie, a computational grid software platform developed by Peking University, and used for executing bioinformatics tasks. We describe its architecture, evaluate its strategies, and compare its performance with GRAM. Analyzing the experiment results, we found that Gracie outperforms GRAM significantly for execution of sets of small tasks, which is aligned with the intuitive advantage of our approaches built in Gracie.
This paper proposes a scheme to achieve high-speed all-optical non-return-to-zero to phase-shift keying (NRZ-to-PSK) conversion by using the linear filtering in the silicon ring resonators. Simulation results are prov...
详细信息
ISBN:
(纸本)9781557528599
This paper proposes a scheme to achieve high-speed all-optical non-return-to-zero to phase-shift keying (NRZ-to-PSK) conversion by using the linear filtering in the silicon ring resonators. Simulation results are provided to verify the feasibility.
Considering that one channel may be redundantly distributed in several locations in today's IPTV delivery network, we propose ILP and heuristic approaches that adopt multi-tree delivery to achieve improved network...
详细信息
ISBN:
(纸本)9781557528599
Considering that one channel may be redundantly distributed in several locations in today's IPTV delivery network, we propose ILP and heuristic approaches that adopt multi-tree delivery to achieve improved network resource utilization.
We report various all-optical signal processing functions using silicon microring resonators with a 450times250-nm cross section. These demonstrations include slow-light delay of phase-modulated data and microwave pho...
详细信息
We report various all-optical signal processing functions using silicon microring resonators with a 450times250-nm cross section. These demonstrations include slow-light delay of phase-modulated data and microwave photonic signal, wavelength conversion/multicasting, format conversions, and optical differentiation.
We presented a novel technique of controlling filamentation with temperature and conducted the experiment in the temperature gradient gas-filled tube by heating the entrance of the gas with a furnace and cooling the e...
We presented a novel technique of controlling filamentation with temperature and conducted the experiment in the temperature gradient gas-filled tube by heating the entrance of the gas with a furnace and cooling the exit of the tube with *** experiment results show that multiple filaments can be merged into single filament by only increasing the local temperature at the beginning of the *** technique offers another degree of freedom of controlling the filamentation and opens a new way for multi-mJ level few-to-monocycle pulse generation through filamentation in rare gases.
This paper overviews the opportunities and challenges of distributed computing over optical network. The Terabits optical Network Integrated Computing Environment (TONICE) project and the Integrated Resources Manageme...
详细信息
We propose an optical implementation of the crosspoint buffered packet switches in order to reduce the buffer control complexity by decoupling the scheduling of packet delay from the switch status.
We propose an optical implementation of the crosspoint buffered packet switches in order to reduce the buffer control complexity by decoupling the scheduling of packet delay from the switch status.
We demonstrate a microwave-photonic phase shifter based on a 20-mum-radius silicon micro-ring resonator, providing a tunable phase shift for a 20-GHz signal in a range of 0 - -4.6 rad.
We demonstrate a microwave-photonic phase shifter based on a 20-mum-radius silicon micro-ring resonator, providing a tunable phase shift for a 20-GHz signal in a range of 0 - -4.6 rad.
An optical fiber buffering structure was proposed by embedding 3J feed-forward optical fiber delay lines into a re-circulating loop. By using SOAs as the ON-OFF switches, this structure is fast programmable and scalable.
ISBN:
(纸本)9781557528599
An optical fiber buffering structure was proposed by embedding 3J feed-forward optical fiber delay lines into a re-circulating loop. By using SOAs as the ON-OFF switches, this structure is fast programmable and scalable.
We propose an optical crosspoint buffered switching fabric to simplify the implementation of optical packet switches. With the proposed switching fabric architecture, the control complexity of the optical buffers can ...
详细信息
We propose an optical crosspoint buffered switching fabric to simplify the implementation of optical packet switches. With the proposed switching fabric architecture, the control complexity of the optical buffers can be significantly reduced.
暂无评论