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1.
神经网络研究的关键问题之一是为神经网络提出有效学习算法。利用t-模的伴随蕴涵算子,为基于Max和TG合成的Hopfield网络Max-TGFHNN提供了一种新的学习算法,此处TG是Godelt-模算子。从理论上严格证明了,只要存在连接权矩阵使得任意给定的模式集成为Max-TGFHNN的平衡态集合,则依该学习算法所确定的连接权矩阵(W$)是所有这样的连接权矩阵中的最大者。并用实验验证该学习算法的有效性。  相似文献   

2.
模糊联想记忆的一种有效学习算法   总被引:13,自引:0,他引:13  
范俊波  靳蕃 《电子学报》1996,24(1):112-115
本文提出最大-最小合成模糊联想记忆的一种新的学习算法,在一定条件下,这种学习算法能将多个模糊模式对可靠地编码到模糊联想记忆的连接权矩阵中,且已存储的模式对可被完整的回想出来。  相似文献   

3.
该文提出多模式对连接权矩阵的一种神经网络学习算法,并给出了严格的理论证明。该算法能够将多个模糊模式对可靠地编码存储到尽可能少的连接权矩阵中,从而大大地减少存储空间,而且容易实现,并举例验证了它的有效性。  相似文献   

4.
文章提出了一种神经网络构造方法一改进的OBD(Optimal Brain Damage)算法,力求使网络的结构(网络权值矩阵)具有三角对称性,定义了衡量网络对称性的三角对称度。一方面,该算法可以提高网络的收敛速度,另一方面.由于网络的对称性,可以有效地提高网络的硬件和软件可实现性。将该算法应用于系统辨识,结果表明在本文提出的算法的训练下.网络结构近似为三角对称,同时不影响网络的学习能力。  相似文献   

5.
提出了一新的基于调度技术的可重排非阻塞三级Clos网络控制算法。本控制算法通过直接交换连接说明矩阵同行元素将其变换为具有完全性的连接说明矩阵,以决定网络开关的控制,本算法的时间复杂度为O(nr)^2。  相似文献   

6.
提出了最大─乘积型模糊联想记忆网络的最大最小编码学习算法,新算法可以记忆任意多个自联想模式。对于异联想模式,给出了一种以最大最小编码算法为基础,近似求解网络连接权阵的梯度下降学习算法,这种方法可用于解最大乘积型模糊关系方程。计算机模拟实验证实了算法的有效性。  相似文献   

7.
葛晓凯  胡显智  戴旭初 《信号处理》2019,35(8):1376-1384
基于子空间分解的相干信源DOA ( Direction of arrival) 估计算法对阵列有特殊的要求,且估计性能较差,在低信噪比时甚至失效;另外,基于压缩感知的DOA估计算法在高信噪比下可以实现相干源的DOA估计,但计算复杂度较高。针对这些不足,本文基于稀疏表示的阵列接收信号模型,提出一种基于深度学习的相干源DOA估计方法,该方法利用卷积网络和全连接网络构造了深度学习网络,并通过选择合适的训练策略,对网络进行了有效训练,利用训练好的深度学习网络能够对相干源进行有效的DOA估计。仿真实验表明,与现有的相干源DOA估计算法相比,本文提出的方法适合于任意阵列结构,在时间复杂度上有着明显的优势,在估计性能上优于平滑解相干和L1-SVD(Sigular Value Decomposition)算法,略差于OGSBI(Off-Grid Sparse Bayesian Inference)算法。   相似文献   

8.
文章提出了一种AdHoc网络的分布式证书撤销算法,该算法利用撤销状况权值记录矩阵A(T W)描述节点间的撤销关系和节点的可信度,通过权值迭代关系逐步实现网络运行过程中权值的不断变化,随着网络中各恶意节点被撤销,正常节点的权值得到恢复,非常适用于AdHoc网络。  相似文献   

9.
基于增量式更新带权差别集合的属性约简算法   总被引:1,自引:1,他引:0  
在面向差别矩阵的约简算法思想的基础上,定义一种新的带权差别集合(WDS)模型,并提出了高效更新带权差别集合的算法,分析了该更新算法的时间和空间复杂度.随后,基于快速更新带权差别集合算法,提出一种增量式属性约简方法.当有新的数据对象被加入决策表,可有效提高属性约简的效率.理论分析和实验结果表明该算法适用于大数据集的约简.  相似文献   

10.
最大—乘积型模糊联想记忆网络的最大最小编码学习算法   总被引:4,自引:0,他引:4  
肖平  杨半 《通信学报》1999,20(1):17-22
提出了最大-乘积型模糊联想记忆网络的最大最小编码学习算法,新算法可以记忆任意多个自联想模式,对于异联想模式,给 种以最大最小编码算法为基础,近似求解网络连接权阵的梯度下降学习算法,这种方法可用于解最大乘积型模糊关系方程,计算机模拟实验证有效性。  相似文献   

11.
DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.  相似文献   

12.
From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.  相似文献   

13.
The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.  相似文献   

14.
The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.  相似文献   

15.
Today, micro-system technology and the development of new MEMS (Micro-Electro-Mechanical Systems) are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.  相似文献   

16.
This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel's.  相似文献   

17.
A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.  相似文献   

18.
A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.  相似文献   

19.
Call for Papers     
正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks  相似文献   

20.
正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first  相似文献   

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