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自由空间光学Comega多级互连网络特性研究 总被引:2,自引:2,他引:0
光学Comega网络是一种新颖的易于光学实现的多级光互连网络。本文对该网络结构及特性进行了详细分析,和到了网络的互连函数,并给出了它与Staran,Crossover,Omega,Banyan及基准等常见网络的拓扑等价证明。 相似文献
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论述了光互连网络对巨型计算机和智能计算机发展的重要作用,指出了光互连网络是解决目前电子计算机中通信“瓶颈”的关键,讨论了采用光互连的物理依据,强调了光互连网络的高效,快速和大容量特性。最后分析了我们正在研究的光学交叉开关互连网络的几个关键参数和初步实验结果。 相似文献
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多状态,多阈值神经网络模型的光电混合实现 总被引:1,自引:0,他引:1
提出了一种采用高分辨率液晶电视(LCTV)实现Hopfield神经网络多值算法的光电系统,文章给出了平面多状态,多阈值的全互连Hopfied神经网络模型,并采用该系统对颜色进行了联想和记忆的实验,初步的实验结果可以证实,此种高分辨率液晶电视神经网络系统是可行的。 相似文献
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数字光开关网络中四功能交换开关光学Omega网络 总被引:2,自引:2,他引:0
本文提出了一种用于数字光开关网络中,四功能交换开关光学Omega网络。文中详细地阐述了用液晶空间光调制方法实现光学四功能交换开关,和Omega互连网络的原理,并给出了光学系统和实验结果。 相似文献
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光电混合MESH互连网络的研究 总被引:2,自引:0,他引:2
提出一种自由空间空分复用的光学MESH互连网络系统.该光学MESH互连网络系统是由N×4位相型计算全息傅里叶光栅分束器、高速多量子阱空间先调制器SEED器件和高速间接耦合光电探测器列阵组成,具有互连数大、数据通道同步性好、光学硬件少、系统简单等特性. 相似文献
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提出了一种新型的具有灵活扩育能力的分块式纵横制光互连网络体系结构,并给出了该网络在最大扩充时光学子系统的物理实现及相应的一些实验结果。该体系结构中可采用自电光效应器件作为高速光调制器。采用在单块GaAs基片上集成的场效应晶体管-自电光效应器件作为逻辑光开关器件。 相似文献
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在一块印刷电路板上通过将自电效应器件(SEED)与GaAs场效应晶体管(FET)进行互连制作一种简单的场效应晶体管-自电光效应器件(FET-SEED)灵巧像素,这种灵巧像素由一个输入自电光效应器件,一个输出自电光效应器件及一个GaAs场效应晶体管放大器构成,设计了一个光学系统,在这个系统以对这种灵巧像素进行了演示及测试,并对其工作原理及过程进行了描述。 相似文献
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基于全内反射的重铬酸明胶全息光互连器件的研究 总被引:1,自引:1,他引:0
研究了利用重铬酸明胶制备的基于全内反射的全息光互连器件,实现了兰光记录,近红外光再现,计算出记录光束的入射角与再现光束的偏转角间的关系曲线以及记录光束的入射角与波长比的关系曲线,器件衍射效率达60%。 相似文献
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Target tracking technology that is based on aerial videos is widely used in many fields; however, this technology has challenges, such as image jitter, target blur, high data dimensionality, and large changes in the target scale. In this paper, the research status of aerial video tracking and the characteristics, background complexity and tracking diversity of aerial video targets are summarized. Based on the findings, the key technologies that are related to tracking are elaborated according to the target type, number of targets and applicable scene system. The tracking algorithms are classified according to the type of target, and the target tracking algorithms that are based on deep learning are classified according to the network structure. Commonly used aerial photography datasets are described, and the accuracies of commonly used target tracking methods are evaluated in an aerial photography dataset, namely, UAV123, and a long-video dataset, namely, UAV20L. Potential problems are discussed, and possible future research directions and corresponding development trends in this field are analyzed and summarized. 相似文献
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利用基于密度泛函理论的第一性原理方法,研究了掺杂铁、钴和镍原子的锯齿型磷烯纳米带(ZPNR)的磁电子学特性.研究表明,掺杂和未掺杂ZPNR的结构都是稳定的.当处于非磁态时,未掺杂和掺杂钴原子的ZPNR为半导体,而掺杂铁或者镍原子的ZPNR为金属.自旋极化计算表明,未掺杂和掺杂钴原子的ZPNR无磁性,而掺杂铁或者镍原子的ZPNR有磁性,但只能表现出铁磁性.处于铁磁态时,掺杂铁原子的ZPNR为磁性半导体,而掺杂镍原子的ZPNR为磁性半金属.掺杂铁或者镍原子的ZPNR的磁性主要由杂质原子贡献,产生磁性的原因则是在ZPNR中存在未配对电子.掺杂位置对ZPNR的磁电子学特性有一定的影响.该研究对于发展基于磷烯纳米带的纳米电子器件具有重要意义. 相似文献
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Ying-Tung Chen Kris Naessens Roel Baets Yunn-Shiuan Liao Ampere A. Tseng 《Optical Review》2005,12(6):427-441
For many years, the development of effective ablation or laser machining techniques for making micro-optical components has
been the key factor in the birth of new photonic devices and systems. In this article, the ablation characteristics of two
types of the most important transparent materials, transparent polymers and glasses, are studied. Simple shaped microcavities
are first machined for studying the fundamental ablation parameters, including threshold fluence, effective absorption coefficient,
and ablation rate. In studying polymer ablation, five standard grades and five proprietary polymeric compounds are selected.
Ablation techniques using these transparent polymers for making arrayed ferrules and curved microlenses are presented. Applications
of these ablated microstructures for optical fiber connectors, optical fiber coupling and alignment, and transparent chip
encapsulants, are introduced and demonstrated with emphasis on the quality of the ablated profiles and dimensions to satisfy
the required performance. In glass ablation, borosilicate glasses are considered and their associated ablation behaviors are
studied. The procedures to ablate glass-based arrayed microstructures with flat and curved surfaces are described. The utilizations
of these arrayed microstructures for optical waveguide, wave absorber, and beam guider, are specifically discussed. Finally,
concluding remakes for future trends are presented. 相似文献
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亲水性材料固相萃取-紫外导数光谱法检测血中茚满二酮灯抗凝 … 总被引:6,自引:1,他引:5
本文报导了血中茚满二酮类抗凝血杀鼠剂敌鼠、氯敌鼠、杀鼠酮的亲水性材料固相萃取-紫外导数光谱检测法。血样用pH5缓冲液等体积稀释后加于西雷脱硅藻土柱上,柱用乙酸乙 酯洗脱,将洗脱液挥发干净,剩余物用pH10缓冲液溶解,测定所得溶液的二阶导数光谱进行定性和定量分析。三种杀鼠剂以10mg/L的量加于空白血中测得萃取率为85%以上,血中三种杀鼠剂的检出限低于2mg/L。萃取中亲水性硅藻土可用硅胶和氧化铝代替, 相似文献
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<正>The nonlinear governing equations of the liquid sloshing modals in a cylindrical storage tank are established. Through analytical analysis,the analytical expressions of the solutions of this kind of system are obtained.With different parameters,the dynamical behaviors of the solutions are different from the trivial ones.To prevent system instability,two selection principles that the stiffness equations are positive-definite and the nonlinear terms of the system are not regenerative elements are given.Meanwhile,numerical simulations are also given,which confirm the analytical results. 相似文献
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César R. de Oliveira 《Journal of statistical physics》1995,78(3-4):1055-1066
The problem of characterizing stability and instability for general nonstationary quantum systems is investigated. Some characterizations are reported and some elementary properties of a topological characterization are established. Then, it is proven, by considering a simple example, that there are nonperiodic driven systems whose orbits are neither precompact nor leave on average any compact set. Autocorrelation measures are computed and the possible roles of the generalizes quasienergy operator and energy growth are briefly discussed. 相似文献
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基于密度泛函理论, 采用第一性原理计算方法研究了C, N, O原子在金属V中的扩散行为. 首先, 讨论了C, N, O原子在V体心立方晶格中的间隙占位情况, 分析了其在间隙位置与V晶格的相互作用, 并探究了这种相互作用对金属V电子结构的影响. 研究结果表明: C, N, O原子在V的八面体间隙位置更为稳定, 并且C, N, O原子的2p电子与V的3d电子之间有比较强的成键作用; C, N, O原子的扩散势垒分别为0.89, 1.26, 0.98 eV, 并得出了其扩散系数表达式; 最后, 通过阿仑尼乌斯关系图对比了三者在V中扩散系数的大小, 并计算出体系温度在500–1100 K之间时其在V中的扩散系数, 计算结果与实验值基本符合. 相似文献