结构系统可靠性优化设计的神经网络方法

针对具有非正态随机参数的可靠性(优化)设计,提出了随机摄动-Edgeworth级数方法,采用该方法将可靠性概率约束转化为等价的确定型约束,可以迅速准确地获得优化设计信息。针对具有多失效模式的结构系统可靠性优化设计,提出了随机模拟一神经网络方法(MCS—NN),将随机模拟方法与神经网络技术有机结合,为结构系统可靠性优化设计提供了一种新方法。     

宽带认知无线电网络分布式协作压缩频谱感知算法

针对宽带认知无线电网络中压缩频谱感知算法在低信噪比环境下频谱检测性能下降的问题,提出了一种基于高斯过程的分布式压缩频谱感知(PBCS)算法.首先应用层次化的正态分布概率模型来表示压缩频谱的重构,然后各个认知无线电用户交换模型参数并结合本地的压缩采样数据进行压缩频谱感知.有别于其他直接融合频谱感知结果或检测数据的协作式算法,PBCS算法通过模型参数融合来进行协作,能有效减小信噪比低的协作用户的影响,从而提高算法的抗噪性.仿真结果表明,PBCS算法可以在-5dB的信噪比条件下达到检测概率大于0.9、误检概率为0.1的频谱检测性能.     

二级加载下疲劳可靠性分析

基于二维概率Miner准则,建立了在二级变幅加载下进行疲劳可靠性分析的系统方法并采用八组较大子样的二级低高和高低加载下的试验数据进行了验证、结果表明;本文方法初步实现了对第一级加载后的剩余疲劳寿命和二级加载下的疲劳总寿命进行较为准确的可靠性预测,预测值与试验值吻合良好     

A study of random Weyl trees

We study binary search trees constructed from Weyl sequences {nθ}, n≥1, where θ is an irrational and {·} denotes “mod 1.” We explore various properties of the structure of these trees, and relate them to the continued fraction expansion of θ. If H_n is the height of the tree with n nodes when θ is chosen at random and uniformly on [0, 1], then we show that in probability, H_n∼(12/π²)log n log log n. © 1998 John Wiley & Sons, Inc. Random Struct. Alg., 12, 271–295, 1998     

Probabilistic Teleportation of an Arbitrary n-Particle Entangled State

A scheme for teleporting an arbitrary n-particle entangled state via n pairs of non-maximally entangled states is proposed. The probability of successful teleportation is determined only by the smaller coefficients of the partially entangled pairs. The method is very easy to be realized.     

Revisiting Probabilistic Teleportation Scheme for Atomic State via Cavity QED

A probabilistic teleportation scheme for atomic state via cavity QED [Phys. Rev. A 70 (2004) 054303] is revisited and accordingly some improvements are made.     

Schemes for Probabilistic Teleportation of a Three-Atom GHZ Class State via Cavity QED

Using a quantum channel composed of a two-atom and a three-atom nonmaximally entangled states,we present two schemes to teleport a three-atom GHZ class state via entanglement swapping in cavity QED with different success probabilities. The schemes can be respectively realized with the large-detuned vacuum cavities and with the large-detuned thermal cavities by separate atomic measurements after we choose appropriate atom-cavity-field interaction time.     

随机压电智能桁架结构闭环控制概率动力响应分析

针对随机压电智能桁架结构研究了基于概率的结构闭环控制系统动力响应分析模型与方法.考虑结构的物理参数、几何尺寸、外荷载幅值以及闭环系统控制力同时具有随机性时,利用振型迭加法导出了结构动力响应随机变量的数字特征计算表达式.通过算例考察了智能结构物理参数、几何尺寸、外荷载幅值以及控制力的随机性对结构闭环控制系统动力响应的影响,并获得了若干有意义的结论.     

Probabilistic Teleportation of an Arbitrary Two-Particle State and Its Quantum Circuits

Two simple schemes for probabilistic teleportation of an arbitrary unknown two-particle state using a non-maximally entangled EPR pair and a non-maximally entangled GHZ state as quantum channels are proposed. After receiving Alice's Bell state measurement results, Bob performs a collective unitary transformation on his inherent particles without introducing the auxiliary qubit. The original state can be probabilistically teleported. Meanwhile, quantum circuits for realization of successful teleportation are also presented.     

（Φ，△）－TYPE PROBABILISTIC CONTRACTOR AND SOLUTIONS FOR A NONLINEAR OPERATOR EQUATIONS IN MENGER PN－SPACES

（Φ，△）－ＴＹＰＥＰＲＯＢＡＢＩＬＩＳＴＩＣＣＯＮＴＲＡＣＴＯＲＡＮＤＳＯＬＵＴＩＯＮＳＦＯＲＡＮＯＮＬＩＮＥＡＲＯＰＥＲＡＴＯＲＥＱＵＡＴＩＯＮＳＩＮＭＥＮＧＥＲＰＮ－ＳＰＡＣＥＳ￥ＦａｎｇＪｉｎｘｕａｎ（方锦暄）（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔ...