作者: 平庸的人或物 時(shí)間: 2025-3-21 22:50 作者: Buttress 時(shí)間: 2025-3-22 00:29
Pulsed Interactions in Nonlinear Fiber Bragg Gratingsdless of the underlying material dispersion. We present theoretical descriptions of both these effects and analyze the first series of experiments which have successfully demonstrated compression due to cross-phase modulation in a grating — the Optical Pushbroom.作者: FIR 時(shí)間: 2025-3-22 05:22
1437-0379 ssomed in the past two decades. New fabrication techniques are producing fiber grating and multidimensional photonic crystals in materials where the refractive index can be varied by light pulses and beams. Gap solitons that can propagate at any velocity from zero to the speed of light and spatial s作者: pacifist 時(shí)間: 2025-3-22 09:50 作者: 鄙視 時(shí)間: 2025-3-22 13:52 作者: Panther 時(shí)間: 2025-3-22 18:20 作者: dura-mater 時(shí)間: 2025-3-23 00:18 作者: 阻礙 時(shí)間: 2025-3-23 01:29 作者: 暗語(yǔ) 時(shí)間: 2025-3-23 08:22 作者: 侵害 時(shí)間: 2025-3-23 10:40
Atomic Solitons in Optical Lattices density profile of the condensate. These dark solitons have been recently demonstrated in two experiments [4,5] which appear to be in good agreement with the predictions of the Gross—Pitaevskii equation.作者: 熟練 時(shí)間: 2025-3-23 17:06
Book 2003ting and multidimensional photonic crystals in materials where the refractive index can be varied by light pulses and beams. Gap solitons that can propagate at any velocity from zero to the speed of light and spatial solitons that prevent the diffractive spread of light in waveguide arrays are two e作者: 沒(méi)有準(zhǔn)備 時(shí)間: 2025-3-23 18:25
struments to high altitudes with a rocket. In 1942, Professor Erich Regener in Stuttgart, Germany, a specialist in atmospheric research, ozone physics, ultraviolet spectroscopy, and cosmic rays, and Wernher von Braun, director of the Peenemünde Rocket Research and Development Center, jointly began t作者: 北京人起源 時(shí)間: 2025-3-24 01:00 作者: saturated-fat 時(shí)間: 2025-3-24 05:21
“dynamic selection” hypothesis, regarding the functional basis for the sagittal zones of the cerebellum. This hypothesis is developed through a discussion of our findings as well as those from other laboratories in the context of two theories of climbing fiber function: one proposing that these affe作者: Collected 時(shí)間: 2025-3-24 08:55
A. Aceves,C. M. de Sterke,M. I. Weinsteinpment of the electron microscope, the ultra-structural features of the different types of cells and synapses were soon characterized in great detail, so that today the synaptology of the cerebellar cortex must be regarded as well established (Mugnaini, 1972; Palay and Chan-Palay, 1974). In contrast,作者: 品牌 時(shí)間: 2025-3-24 11:35
S. Pereira,J. E. Sipey throughout. The regularity of the laminated structure of the cerebellar cortex permits the identification of the main cell types, even on conventionally stained sections, based on their position and size. Contrasting with its regular architecture, the cerebellar cortex is subdivided into a mosaic 作者: 串通 時(shí)間: 2025-3-24 17:08
H. G. Winful,V. E. Perlin Neutron Doctrine. These chapters represent important aspects of the morphology, development, and function of the cerebellum and related structures. Clearly an exhaustive analysis of all aspects of the cerebellar system, as they relate to the legacy of Ramon y Cajal, would be impossible to contain i作者: Allowance 時(shí)間: 2025-3-24 19:36
C. Conti,S. Trillo neighboring regions of the cortex within the same folium as well as in adjacent and even in rather remote folia. According to the classical description of . (1911) the recurrent collaterals are myelinated and ascend in oblique direction through the deeper strata of the granular layer. Upon reaching作者: Expressly 時(shí)間: 2025-3-24 23:46 作者: 無(wú)所不知 時(shí)間: 2025-3-25 03:24 作者: SEVER 時(shí)間: 2025-3-25 11:08 作者: d-limonene 時(shí)間: 2025-3-25 13:22 作者: 無(wú)能力 時(shí)間: 2025-3-25 19:16 作者: Migratory 時(shí)間: 2025-3-25 23:33 作者: Graphite 時(shí)間: 2025-3-26 01:08
G. P. Agrawal,D. N. Maywarence of neuronal cell death. “Which cells are the antigen presenting cells (APC) of the brain?” is the main question of this book. The immune surveillance of the CNS occurs through specialized resident cells, which present (auto)antigen(s) to the immune system and thus initiate an (auto)immune respo作者: 退出可食用 時(shí)間: 2025-3-26 06:41 作者: Microaneurysm 時(shí)間: 2025-3-26 10:41
ide anaesthesia. Pial venous and arterial reactions were observed through closed cranial windows. Diameter variations of 261 venous and 166 arterial vessel portions were continuously analysed using a multichannel videoangiometer with an in vivo accuracy around 2%. Pial veins constricted by 12.7% and作者: 樣式 時(shí)間: 2025-3-26 15:43
H. Eisenberg,Y. Silberbergrough a glass-covered skull window in dogs. The diameter of the pial vein was relatively increased within a short interval after sinus occlusion. Diapedesis of fluorescein dye from the pial vein was observed thirty minutes after the sinus occlusion prior to petechial haemorrhage. This indicates that作者: 彎彎曲曲 時(shí)間: 2025-3-26 20:26 作者: 縮短 時(shí)間: 2025-3-26 21:15 作者: affluent 時(shí)間: 2025-3-27 01:59
Polarization Effects in Birefringent, Nonlinear, Periodic Media of the experimental work in this field has concentrated on fiber Bragg gratings, which typically have refractive index variations on the order of 10. [6,7]. With such small index variations, it is reasonable to apply the heuristic nonlinear coupled mode equations, or the appropriate nonlinear Schr?作者: 是貪求 時(shí)間: 2025-3-27 08:12
Self-transparency and Localization in Gratings with Quadratic Nonlinearityt the possibility to observe nonlinear behavior in periodic media made out of this class of materials, and in particular effects of self-transparency and switching mediated by localized envelopes such as those observed in cubic media (e.g., fibers [1] and A1GaAs [2]) and discussed elsewhere in this 作者: 解凍 時(shí)間: 2025-3-27 11:54
Photonic Band Edge Effects in Finite Structures and Applications to χ(2) Interactionscades. Usually referred to as photonic band gap (PBG) crystals [1], the essential property of these structures is the existence of allowed and forbidden frequency bands and gaps, in analogy to energy bands and gaps of semiconductors. An early paper by Armstrong and co-workers [2] and a second by Blo作者: 薄膜 時(shí)間: 2025-3-27 14:35
Theory of Parametric Photonic Crystalsere one has twice the frequency of the other. This allows coupling to occur between the bandgaps, provided the dielectric itself has a quadratic or parametric nonlinearity. Since Bloembergen’s time, it has been known that a modulated quadratic nonlinearity can enhance the prospects for phase-matchin作者: 進(jìn)取心 時(shí)間: 2025-3-27 20:27
Nonlinear Propagation in Fiber Gratingsings in silica fibers have been developed for many linear applications, for example for optical filters in wavelength division multiplexed optical communication systems. These high quality fiber Bragg gratings have been used to observe nonlinear propagation phenomena for the first time in photonic c作者: Morose 時(shí)間: 2025-3-28 01:26
Gap Solitons Experiments within the Bandgap of a Nonlinear Bragg Gratinghen the frequency of the incident light lay within the grating’s band gap. Since then much work both experimental and theoretical has been done on the nonlinear properties of Bragg gratings and in this chapter we present a brief review of our work concentrating on nonlinear light propagation in Brag作者: 無(wú)禮回復(fù) 時(shí)間: 2025-3-28 02:39 作者: fulcrum 時(shí)間: 2025-3-28 10:05 作者: 責(zé)問(wèn) 時(shí)間: 2025-3-28 13:09
Optical Properties of Microstructure Optical Fibersign of an optical fiber consists of silica cladding that surrounds a silica core doped with germanium (GeO.), which increases the index of refraction by up to 2% above that of pure silica, allowing light to be guided by total internal reflection at the core-cladding interface. Over the years, howeve作者: 一美元 時(shí)間: 2025-3-28 17:06 作者: Recessive 時(shí)間: 2025-3-28 22:34 作者: 象形文字 時(shí)間: 2025-3-29 02:16
Discrete Solitonsesented as continuous operators. Discrete optical fields, which have values only at specific locations, are somewhat unnatural. Nevertheless, there are situations where optical systems can be represented as discrete fields. In particular, the interaction of several coupled modes is usually approxima作者: Mitigate 時(shí)間: 2025-3-29 05:07
H. G. Winful,V. E. Perlins quite well known, only certain aspects of the structure should be discussed here. For example, the organization of the pontocerebellar pathways, we felt, would be particularly interesting given the enormity of the system in higher vertebrates. Also of interest is the distribution and development of the syna978-1-4612-7691-3978-1-4612-2840-0作者: Influx 時(shí)間: 2025-3-29 08:29 作者: nocturnal 時(shí)間: 2025-3-29 14:45
espectively. Above threshold values, stimulation cur- rent showed an approximately linear relationship to duration of EEG sup- pression. The after-discharge resulting from focal electrical stimulation of the cerebral cortex could be shortened by electrical stimulation of the para- median lobule. The effect wa978-1-4613-4510-7978-1-4613-4508-4作者: municipality 時(shí)間: 2025-3-29 17:06 作者: gregarious 時(shí)間: 2025-3-29 21:35
H. Eisenberg,Y. Silberbergor more than one hour, two types of microcirculatory change in the pial veins were observed. One change is of the “no-filling” type and the other is of the intravascular stasis type. The “no-filling” type is thought to lead to an extensive haemorrhagic infarction thereafter.作者: climax 時(shí)間: 2025-3-30 02:43 作者: Aids209 時(shí)間: 2025-3-30 07:49
C. Conti,S. Trillofibers, especially of the upper plexus, can be recognized easily from their myelin sheaths (Fox, . and ., 1964), there being no other myelinated fibers in the molecular layer except the rare Cajal-Smirnov fibers.作者: Negligible 時(shí)間: 2025-3-30 10:23 作者: 束縛 時(shí)間: 2025-3-30 14:11 作者: Decline 時(shí)間: 2025-3-30 16:32 作者: 思考而得 時(shí)間: 2025-3-31 00:36 作者: Foolproof 時(shí)間: 2025-3-31 00:55
Self-transparency and Localization in Gratings with Quadratic Nonlinearityy is commonly employed to achieve phase-matching of frequency conversion process, by means of so called quasi-phase-matching (QPM) techniques [4,5], recently extended in planar (2D) geometry [6,7]. On the other hand also periodic variations of linear properties over submicron scale has been introduc作者: 改正 時(shí)間: 2025-3-31 08:40
