基于微分进化免疫的RBF网络学习算法研究

该文提出一种微分进化算法与免疫算法相结合的方法,将该方法用于优化RBF网络隐节点参数,以改进RBF网络的性能,仿真结果表明收敛速度较快,训练精度较高,有效地改进网络的泛化能力.     

考虑货币时间价值的变质商品临时价格折扣模型

为了研究零售商面对供应商为变质商品提供临时价格折扣时的最优决策,利用混合整数规划建立了一个考虑货币的时间价值性的变质商品临时价格折扣模型;分别就折扣生效时库存为零和不为零两种情况下零售商的定价和库存策略进行了分析;并利用数值例子进行了说明.研究表明,货币的时间价值性和商品的变质特性以及折扣生效时零售商的库存等因素对零售商的决策影响很大;临时价格折扣能够增加零售商的利润.     

相关免疫函数的特征与构造

本文首先给出了布尔函数是m阶相关免疫的充要条件,其次介绍了一种从两个n个变元的m阶相关免疫函数构造n+1个变元的m+1阶相关免疫函数的方法。     

Reproductive biology of Scinax fuscomarginatus (Anura,Hylidae) in south‐eastern Brazil

The present study describes the reproductive biology of Scinax fuscomarginatus in a remnant of Cerrado in south‐eastern Brazil. Observations were made between September 2002 and March 2004 at Estação Ecológica de Itirapina, State of São Paulo, south‐eastern Brazil. Breeding activities occurred in lentic and temporary bodies of water during the rainy season. Scinax fuscomarginatus exhibited a prolonged breeding pattern and a lek mating system. Males were smaller than females and defended individual calling areas through acoustic and physical interactions. Resident males consistently won encounters, but did not differ in size or mass from intruder males. Satellite behaviour was observed, but no female or amplected pair interception was registered. Scinax fuscomarginatus exhibited low operational sex ratios and the general reproductive mode in which eggs are laid in the water and tadpoles are aquatic. Amplexus was axillary and the eggs were deposited at the bottom of temporary ponds. Details on oocytes, egg masses, and eggs are included.     

临时用电节能措施探讨

节约投资、降低成本是目前建筑施工的主导思想.从临时用电负荷统计、配电线路选择、提高功率因数、用电管理等角度,探讨了降低临时用电投资应注意的事项及采取的措施.     

公路应急钢便桥技术论证分析

本文分析了使用就便器材架设应急公路桥梁的必要性、可行性,对使用型钢、集装箱等材料架设应急桥梁的架设时机、承载能力、桥梁跨度、架设时限等性能进行了设计论证,并对涉及的关键技术进行了理论计算和验证试验。     

临时用电施工组织设计软件的研制及应用

根据目前施工现场时有触电事故发生的现象，通过对施工现场临时用电存在的问题进行分析，提出了临时用电施工组织设计的编制新思路、方法及步骤，建立了软件总体结构，给出了结构设计流程，并结合具体实例分析施工现场临时用电施工组织设计的软件功能实现过程，为现场安全用电提供了技术保障，使繁琐的临时用电施工组织设计的编制简单、准确和快捷。     

软弱隧道拱顶防沉降技术

通过对西汉高速公路51标段酉水3号、4号隧道的施工,针对软弱地质隧道水平收敛大、拱顶下沉快的特点,提出了相应的预控施工方案,包括开挖和支护、监控量测、大拱脚和临时仰拱的施工等。     

CD8+T细胞亚群在大鼠肠道各部IEL与LPL中的分布差异

目的：探讨CD8^ 淋巴细胞在抗原诱导下的粘膜免疫应答中的作用．方法：采用免疫组织化学方法及电镜法，观察成年大鼠肠道各段IEL与LPL的形态和分布特征．结果：经免疫组织化学方法可染出CD8^ 表型的淋巴细胞，光镜下可见CD8T^ IEL沿肠道依次递减，而CD8^ LPL则依次递增．结论：CD8^ T细胞在肠道各段的分布上存在差异．     

Construction of balanced rotation symmetric boolean functions with optimal algebraic immunity

Algebraic immunity is a new cryptographic criterion proposed against algebraic attacks. In order to resist algebraic attacks, Boolean functions used in many stream ciphers should possess high algebraic immunity. This paper presents one main result to find balanced rotation symmetric Boolean functions with maximum algebraic immunity. Through swapping the values of two orbits of rotation class of the majority function, a class of 4k＋l variable Boolean functions with maximum algebraic immu- nity is constructed. The function f（x） we construct always has terms of degree n-2 independence of what ever n is. And the nonlinearity off（x） is relatively good for large n.