Optimal Scheduling Method in MIMO WLAN with Distributed Coordination Function

This paper addresses the optimal number of simultaneous data transmissions that maximize the system throughput in an MIMO WLAN. To facilitate simultaneous packet transmissions, both transceivers have to exchange preambles to calculate the channel state information. This exchange is combined with the RTS (request to send)/CTS (clear to send) handshake which is used to contend for the channel in WLANs. This study presents an expression for the optimal number of simultaneous data transmissions under the distri...     

具状态依赖时滞更一般微分方程周期正解

利用一不动点定理,对较同类具状态依赖时滞更为一般的非线性微分方程:x′(t)=-a(t,x(t))x(t)+f(t,x(t-1τ(t,x(t))),…,x(t-τm(t,x(t)))),x′(t)=a(t,x(t))x(t)-f(t,x(t-1τ(t,x(t))),…,x(t-τm(t,x(t)))),进一步研究,得到一些保证此类方程存在多个周期正解的充分条件而比相关研究有更好的结果.     

揭开素数神秘的面纱

整数→∞,按素数是仅能被1和自身整除的质数的定义,将直角坐标第1象限X、Y轴上≥3的奇数相乘：按乘法公倍数及同值留1,二进制和十进制,数和图,图表和算式,算数和逻辑,观察和推理6结合的图表计算,在各S2（S〉3奇数）范围内确定奇素数、奇数积,得到素数序列PA（Prime Array）及其性质。     

Hierarchical interacting multiple model algorithm based on improved current model

Interacting multiple models is the hotspot in the research of maneuvering target models at present. A hierarchical idea is introduced into IMM algorithm. The method is that the whole models are organized as two levels to co-work, and each cell model is an improved “current” statistical model. In the improved model, a kind of nonlinear fuzzy membership function is presented to get over the limitation of original model, which can not track weak maneuvering target precisely. At last, simulation experiments prove the efficient of the novel algorithm compared to interacting multiple model and hierarchical interacting multiple model based original “current” statistical model in tracking precision.     

多重双势垒结构中电子共振隧道效应的理论研究

研究了一维多重双势垒结构中电子共振隧穿效应，给出了透射系数和共振隧穿条件的解析表达式，数值计算并解释了随双势垒内外讲宽度差△ｄ变化的共振隧穿透射能谱，与对应的多重单势垒结构相比，这种多重双势垒结构显示出一些有趣的性质．     

一种在非单调和不完全领域知识下的EBL方法

基于解释的学习（ＥＢＬ）克服了基于相似性的学习中的一些局限性，但是由于领域知识的不完全性和非单调法，在ＥＢＬ过程中会出现等多重解释问题，运用分层ＡＴＭＳ（基于解释的真值维护系统）来实现ＥＢＬ方法，由于分民支ＡＴＭＳ能处理非单调推理和多重假设集，因而它能根据不同原因解决了ＥＢＬ中的多重解释问题。     

单位圆内亚纯函数的辐角分布

研究了单圆内ρ级亚纯函数涉及导数,重值及小函数的Ｈａｙｍａｎ方向的存储性问题,证明了类似于平面上的亚纯函数辐射分布的结果。     

近于优化跨度连续曲线梁的自由振动

基于在低速移动荷载或静力荷载作用下,多跨连续曲梁各跨峰值挠度相等的原则,给出了多跨连续曲梁在静力荷载作用下优化跨度及在动力荷载作用下近于优化跨度的取值,并对近于优化跨度的三跨连续曲梁,采用逆向搜索法首次获得其自由振动率及模态的解析解．对比试验曲梁的试验结果与计算结果,两者吻合十分良好,证明所得结果的正确性     

微分多项式具有重值的亚纯函数的奇异方向

给出了一类亚纯函数在涉及微分多项式具有重值情况下的正规定则与奇异方向,分别推广了杨乐、顾永兴、陈怀惠、柏盛桄和作者的结果.