Power allocation algorithm of full duplex cognitive relay network based on energy harvesting

To alleviate the shortage of spectrum resources and improve the power utilization of cognitive radio networks,a resource allocation algorithm of full duplex cognitive relay networks with energy harvesting was proposed.In the algorithm,the coefficient for power splitting of the relay and the transmit power of the secondary users were jointly optimized to maximize the throughput of the secondary users under the interference to primary users and energy harvesting constraints.Since the optimization of the algorithm was non-convex,it was transformed into two sub-optimizations,the sub-optimization of the coefficient for power splitting and the sub-optimization of the power transmitted of secondary users,which were the solvable convex sub-optimizations.Then,the final solution of the original optimization was obtained with the iterative algorithm.Simulation results show that the throughput of the proposed algorithm,can obtain 2 times throughput of the networks with half-duplex power splitting algorithm and 1.5 times throughput of the networks with full-duplex time switching algorithm.     

一种单片高速四位计数器／移位寄存器

本文介绍了一种双极单片高速ＥＣＬ电路四位计数器／移位寄存器。     

图象智能检测报警记录系统的技术设计

提出了图象灰度的亮度加权平均和位置加权平均的一种新的图象变化识别技术，依此原理并把电视技术与计算机技术相结合，设计研制了图象智能检测报警记录系统，介绍了系统的组成及技术原理。     

The large numbers hypothesis and quantum mechanics

In this paper, the suggested similarity between micro and macrocosmos is extended to quantum behavior, postulating that quantum mechanics, like general relativity and classical electrodynamics, is invariant under discrete scale transformations. This hypothesis leads to a large scale quantization of angular momenta. Using the scale factor Λ ~ 10³⁸, the corresponding quantum of action, obtained by scaling the Planck constant, is close to the Kerr limit for the spin of the universe - when this is considered as a huge rotating black hole - and to the spin of Gödel’s universe, solution of Einstein equations of gravitation. Besides, we suggest the existence of another, intermediate, scale invariance, with scale factor λ ~ 10¹⁹. With this factor we obtain, from Fermi’s scale, the values for the gravitational radius and for the collapse proper time of a typical black hole, besides the Kerr limit value for its spin. It is shown that the mass-spin relations implied by the two referred scale transformations are in accordance with Muradian’s Regge-like relations for galaxy clusters and stars. Impressive results are derived when we use a λ-scaled quantum approach to calculate the mean radii of planetary orbits in solar system. Finally, a possible explanation for the observed quantization of galactic redshifts is suggested, based on the large scale quantization conjecture.     

溶液中离子－偶极子俘获力常数及离子内氛重组能标度

本文基于重组现象改进的自交换模型及离子－偶极子俘获力场势，提出了描述外氛电子转移机理中溶液离子内氛重组织效应的能量指标的一种新的标度方法，并对公式中所含参数利用离子－偶极子俘获力场势进行了确定。结果表明该方法有效地改进了前人的工作，取得了与实验光谱标度数据一致的结论，并与光发射实验结果吻合较好。它避免了因缺乏溶液中可信的振动光谱数据在计算内氛重组能上的困难，通过易得的离子和配体的性质参数给出了一种简便而精确的计算方案。     

Extra dimension searches at hadron colliders to next-to-leading order-QCD

The quantitative impact of NLO-QCD corrections for searches of large and warped extra dimensions at hadron colliders are investigated for the Drell-Yan process. The K-factor for various observables at hadron colliders are presented. Factorisation, renormalisation scale dependence and uncertainties due to various parton distribution functions are studied. Uncertainties arising from the error on experimental data are estimated using the MRST parton distribution functions.      

Instability results for slowly time varying linear dynamic systems on time scales

We develop eigenvalue criteria under which the solutions of a “slowly” time varying linear dynamic system of the form xΔ(t)=A(t)x(t) are unstable.     

一维晶格振动声子谱的全量子理论和"不变量本征算符"方法

建立一维晶格振动声子谱的全量子理论,其哈密顿量是自动包含了Born-von-Karmann边界条件的环链量子哈密顿量,然后用不变本征算符方法简捷地求出其声子谱.     

Time averaging for the strongly confined nonlinear Schrödinger equation, using almost-periodicity

We study the limiting behavior of a nonlinear Schrödinger equation describing a 3-dimensional gas that is strongly confined along the vertical, z direction. The confinement induces fast oscillations in time, that need to be averaged out. Since the Hamiltonian in the z direction is merely assumed confining, without any further specification, the associated spectrum is discrete but arbitrary, and the fast oscillations induced by the nonlinear equation entail countably many frequencies that are arbitrarily distributed. For that reason, averaging cannot rely on small denominator estimates or like.To overcome these difficulties, we prove that the fast oscillations are almost-periodic in time, with values in a Sobolev-like space that we completely identify. We then exploit the existence of long-time averages for almost-periodic functions to perform the necessary averaging procedure in our nonlinear problem.     

基于Delphi下电子秤的研制

针对传统方式下计算机与外围设备通讯可视化低的缺点,以ACS 30 XB信函包裹电子秤为例,系统地介绍PC机与8031单片机的串行通讯原理,在Windows 98操作系统下用Delphi语言开发实现了ACS 30 XB电子秤的量程自动切换和零点自动跟踪功能、PC机与ACS 30 XB电子秤之间的串行通讯,并通过配置的RS 232 C标准串行口,实现计算机的联网管理。实验结果表明,开发的ACS 30 XB电子秤在显示精度和稳定性方面都表现出了较好的特性,同时,具有良好的可视化界面,便于操作管理。