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排序方式: 共有355条查询结果,搜索用时 15 毫秒
1.
Lourtioz J.-M. Chusseau L. Brun E. Hamaide J.-P. Lesterlin D. Leblond F. 《Electronics letters》1992,28(16):1499-1500
Fourier-transform-limited pulses ( Delta tau . Delta nu approximately=0.35) have been obtained from a microwave-modulated DBR laser at 1.56 mu m. The chirp of the gain-switched pulse is compensated for by applying a fraction of the microwave signal to the phase section, thereby creating an instantaneous frequency shift of opposite sign. The generation of short coherent pulses from such a monolithic source can be of great interest for long haul soliton transmission.<> 相似文献
2.
Langanay J. Brindel P. Brun E. Provost J.G. Lesterlin D. Hamaide J.P. 《Electronics letters》1994,30(19):1599-1601
The variability of optical frequency modulation with electric field in an electro-optical phase section is analysed. When configured for maximum sensitivity, the electro-optical phase section was used to compensate for the chirp of the gain section: 48 ps and 8.5 GHz wide transform-limited pulses were obtained at 5 GHz 相似文献
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A. Brun L. Brunel P. Snabre 《Surface Coatings International Part B: Coatings Transactions》2006,89(3):251-254
In this work a new optical technology, ASII, is presented, for the study of film formation from all kinds of dispersed systems,
such as latexes, emulsions or solvent-borne suspensions. Various film-forming products have been investigated, including water-borne
coatings, on various types of substrates. A wide range of information can be extracted such as objective drying times (dust-free,
dry-hard times, etc) or mechanism taking place, thereby offering new possibilities to analyse film formation from complex
colloidal systems. 相似文献
5.
David Hocker Yicong Zheng Robert Kosut Todd Brun Herschel Rabitz 《Quantum Information Processing》2016,15(11):4361-4390
There is a rich variety of physics underlying the fundamental gating operations for quantum information processing (QIP). A key aspect of a QIP system is how noise may enter during quantum operations and how suppressing or correcting its effects can best be addressed. Quantum control techniques have been developed to specifically address this effort, although a detailed classification of the compatibility of controls schemes with noise sources found in common quantum systems has not yet been performed. This work numerically examines the performance of modern control methods for suppressing decoherence in the presence of noise forms found in viable quantum systems. The noise-averaged process matrix for controlled one-qubit and two-qubit operations are calculated across noise found in systems driven by Markovian open quantum dynamics. Rather than aiming to describe the absolute best control scheme for a given physical circumstance, this work serves instead to classify quantum control behavior across a large class of noise forms so that opportunities for improving QIP performance may be identified. 相似文献
6.
Picosecond pulses emitted from a gain-switched laser diode have been amplified in a Ti:sapphire regenerative amplifier indirectly pumped by a 4-W laser diode. This all-solid-state system produced microjoule pulses tunable from 803 to 840 nm at repetition rates up to 25 kHz with durations of 70-100 ps. By frequency doubling and tripling the output, we generated blue and UV pulses tunable from 401 to 420 nm and from 268 to 280 nm, respectively. Average powers larger than 4 mW were reached in these two wavelength regions. 相似文献
7.
Formalized study of self-assembly has led to the definition of the tile assembly model [Erik Winfree, Algorithmic self-assembly of DNA, Ph.D. Thesis, Caltech, Pasadena, CA, June 1998; Paul Rothemund, Erik Winfree, The program-size complexity of self-assembled squares, in: ACM Symposium on Theory of Computing, STOC02, Montreal, Quebec, Canada, 2001, pp. 459–468]. Research has identified two issues at the heart of self-assembling systems: the number of steps it takes for an assembly to complete, assuming maximum parallelism, and the minimal number of tiles necessary to assemble a shape. In this paper, I define the notion of a tile assembly system that computes a function, and tackle these issues for systems that compute the sum and product of two numbers. I demonstrate constructions of such systems with optimal Θ(1) distinct tile types and prove the assembly time is linear in the size of the input. 相似文献
8.
Strictly periodic scheduling in IMA-based architectures 总被引:1,自引:0,他引:1
Ahmad Al?Sheikh Olivier Brun Pierre-Emmanuel Hladik Balakrishna J. Prabhu 《Real-Time Systems》2012,48(4):359-386
The avionic industry has recently adopted the Integrated Modular Avionics (IMA). Such architectures allow the execution of avionic functions on a shared computing platform while avoiding any interference between them. This is done through hard memory and temporal segregation constraints. Although IMA reduces the weight and the power consumption and shortens the design-cycle times, it gives rise to a complex multiprocessor scheduling problem. One of the key difficulties of this problem is related to the strict periodicity of tasks, which means that the time separating two successive executions of the same task is strictly equal to the associated period. In order to help the system designer in producing a proper schedule, an exact formulation based on Integer Linear Programming and a heuristic inspired from Game Theory are proposed. To enhance the solution quality of the heuristic, a?multi-start method, which gives some probabilistic guarantees on the optimality of the solutions, is also introduced. 相似文献
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