Φ-伪压缩型映象的Ishikawa迭代逼近

引入Φ-伪压缩型映象的概念,并研究单值Φ-伪压缩型映象不动点的Ishikawa迭代程序的逼近问题,而映象不必满足Lipschitz条件.所谓Φ-伪压缩型映象,就是:设D是E之一非空集,T:D→D是一单值映象,如果存在一点x*∈D及一严格增的函数Φ:[0,∞]→[0,∞],Φ(0)=0,使得对每一x∈D,存在j(x-x*)∈J(x-x*)满足〈Tx-x*,j(x-x*)〉‖x-x*‖2-Φ(‖x-x*‖).则T称为Φ-伪压缩型映象.在引出相关概念及预备知识后,首先研究了Ishikawa迭代程序的收敛性问题,并在此研究的基础上,进一步研究Φ-伪压缩型映象的Ishikawa迭代序列的收敛性问题.结果改进了引文[1]的结果.     

Ф-伪压缩型映象的Ishikawa迭代逼近

引入Ф-伪压缩型映象的概念，并研究单值Ф-伪压缩型映象不动点的Ishikawa迭代程序的逼近问题，而映象不必满足Lipschitz条件．所谓Ф-伪压缩型映象，就是：设D是E之一非空集，T：D→D是一单值映象，如果存在一点x^#∈D及一严格增的函数Ф：[0，∞]→[0，∞]，Ф,（0）=0，使得对每一x∈D，存在j（x—x^#）∈J（x—x^#）满足（Tx—x^#，j（x—x^#）〉≤｜｜x—x^#｜｜^2-Ф（｜｜x—x^#｜｜）．则T称为争伪压缩型映象．在引出相关概念及预备知识后，首先研究了Ishikawa迭代程序的收敛性问题，并在此研究的基础上，进一步研究Ф-伪压缩型映象的Ishikawa迭代序列的收敛性问题．结果改进了引文[1]的结果．     

变分包含与平衡问题公解的迭代算法

在Hilbert空间的框架下,为寻求具多值极大单调映象和逆强单调映象的变分包含的解集、平衡问题的解集与无限簇非扩张映象的不动点集的公共元,引入和研究了一种新的迭代算法.在一定的条件下,用黏性逼近法证明了序列逼近于这一公共元的强收敛定理.     

非Lipschitz渐近伪压缩映象不动点的迭代逼近

在去掉{xn}有界的条件下,从而没有使用{Tnxn}和{Tnyn-yn}的有界性条件,在实Banach空间中建立了非一致Lipschitz的渐近伪压缩映象不动点的更一般的具混合误差的修改的Ishikawa迭代序列的强收敛定理,从而改进和推广了已有的相关结果.     

渐近半伪压缩映射合成隐迭代序列的强收敛性

参照Banach压缩映照原理,合理引进了一涉及有限族渐近半伪压缩映射的具误差的合成隐迭代序列.在一致凸Banach空间中,研究该合成隐迭代序列的强收敛性,得到了具误差的合成隐迭代序列强收敛于有限族渐近半伪压缩的公共不动点的充要条件.     

多值广义混合隐似平衡问题解的迭代算法

运用辅助原则的技巧提出了多值广义混合隐似平衡问题的预测校正迭代算法,并在一定条件下证明了算法的收敛性.     

不动点问题和广义联立变分不等式问题及混合平衡问题的迭代格式

在Hilbert空间中介绍了1种迭代序列,利用这种序列找出了混合平衡问题的解集和非扩张映射不动点问题的解集以及关于逆强单调的广义联立变分不等式问题解集的公共元.证明了在某些参数控制条件下,迭代序列强收敛于此公共元.     

一类具有四元算子的广义混合隐拟平衡问题

引入和研究了一类具有四元算子的广义混合隐拟平衡问题.运用辅助原理技巧提出和分析了求解广义混合隐拟平衡问题的新的三步预测-校正迭代算法,并在较弱的条件下证明了该算法的收敛性.     

多值广义混合隐似平衡问题解的迭代算法

运用辅助原则的技巧提出了多值广义混合隐似平衡问题的预测校正迭代算法,并在一定条件下证明了算法的收敛性.     

有限一致拟-李卜希兹映象族公共不动点的逼近

在凸度量空间内,研究了带误差的Ishikawa型迭代方法逼近有限一致拟-李卜希兹映象族的公共不动点.在一定条件下,给出了带误差的Ishikawa迭代序列收敛于有限一致拟-李卜希兹映象族的公共不动点的充要条件.

Abstract：

The purpose of this paper is to study some kind of Ishikawa type iterative scheme with errors to approximate a common fixed point of a finite family of uniformly quasi-Lipschitzian mappings in convex metric spaces. Under appropriate conditions, some convergence theorems are proved. The results presented in the paper generalize, improve and unify some recent results .     

一类新条件下的渐近非扩张映象迭代算法的收敛性

首次引进新的假设条件Ф≠F(T)=F(T2)=…=F(Tn)=…,其中F(T)是渐近非扩张映象T的不动点集.在自反Banach空间的框架下,获得了渐近非扩张映象T的迭代序列强收敛于其不动点的结论.     

QTL作图主要统计方法及主要作图群体

 系统而简要的介绍了数量性状基因位点作图（QTL作图）及其主要方法、计算机软件及相应作图群体等。QTL作图的主要统计分析方法有采用t-检验、方差分析、回归分析等方法的单标记分析方法,基于两个侧连标记的区间作图法和复合区间作图法,以及近几年由KAO 和ZENG利用Cockerham模型发展起来的多重区间作图法等。分别介绍了QTL作图的主要作图群体如回交,F₂,DH,RIL等,并对这几种作图群体进行了比较。     

Molecular detection of the powdery mildew resistance genes in winter wheats DH51302 and Shimai 26

Resistance to powdery mildew is an important trait of interest in many wheat breeding programs. The information on genes conferring resistance to powdery mildew in wheat cultivars is useful in parental selection. Winter wheat breeding line DH51302 derived from Liangxing 99 and cultivar Shimai 26 derived from Jimai 22 showed identical infection patterns against 13 isolates of Blumeria graminis f. sp. tritici(Bgt) that causes wheat powdery mildew. DH51302 and Shimai 26 were crossed to a powdery mildew susceptible cultivar Zhongzuo 9504 and the F_(2:3) families were used in molecular localization of the resistance genes. Fourteen polymorphic markers, which were linked to Pm52 from Liangxing 99, were used to establish the genetic linkage maps for the resistance genes Pm DH51302 and Pm SM26 in DH51302 and Shimai 26, respectively. These genes were placed in the same genetic interval where Pm52 resides. Analysis of gene-linked molecular markers indicated that Pm DH51302 and Pm SM26 differed from other powdery mildew resistance genes on chromosome arm 2 BL, such as Pm6, Pm33, Pm51, Ml Zec1, Ml AB10, and Pm64. Based on the results of reaction patterns to different Bgt isolates and molecular marker localization, together with the pedigree information, DH51302 and Shimai 26 carried the same gene, Pm52, which confers their resistance to powdery mildew.     

棉花数量性状的连锁作图和关联作图最新进展

现代分子生物学技术和新的统计方法,大大促进了植物数量性状基因(QTL)的解析.连锁作图和关联作图是目前植物数量性状基因解析的重要方法,两者在QTL定位的精度和广度、提供的信息量、统计分析方法等方面具有明显的互补性.连锁作图可以初步对目标性状基因进行定位,而关联作图则可快速对目标基因进行验证和精细定位,并针对特定候选基因提供大量信息,验证候选基因的功能.综述了近10年来棉花数量性状的连锁作图和关联作图最新进展,并结合两种方法对棉花的QTL研究前景进行了展望.     

水稻数量性状(QTL)定位主要作图群体及统计方法概述

水稻许多重要的性状是由多基因控制的数量性状,因此数量性状的研究对促进水稻高产、抗病、质优具有重要意义。分子生物技术的迅速发展和QTL定位方法的日趋完善,为水稻数量性状的研究提供了基础。综述了QTL定位的原理、定位群体和常用的方法,并对目前水稻数量性状QTL定位存在的问题和发展前景进行了探讨。     

数字化测图实践与认识

随着测绘科学技术的发展，传统的模拟法测图方法已被数字化测图方法所替代。本文从数字化测图工作的外业、内业以及测量成果表现形式上，对数字化测图与模拟法测图的特点进行了对比分析；分析了数字化测图质量评价的内容和特点；结合数字化测图的工作实践，对数字化测图工作提出了几点有益的认识。     

二倍体数量性状QTL定位方法

论述了数量性状基因（quantitative trait locus,QTL）定位方法的产生与发展,并总结了每种方法的优缺点,特别是对区间作图方法和复合区间作图方法进行了较详细的介绍。     

Progress on Mapping of Quantitative Trait Loci in Crops

Most important agricultural traits of crops are controlled by many genes. These traits have complicated genetic basis and are difficult for genetic analysis. Due to application of molecular marker techniques in the last two decades, genetic and molecular dissection of quantitative traits has become possible. In this paper, recent progress on mapping of quantitative trait loci in crops was reviewed.     

Wireless tracking of cotton modules. Part 1: Automatic message triggering

The ability to map profit across a cotton field would enable producers to determine where money is being made or lost on their farms and to implement precise field management practices to facilitate the highest return possible on each portion of a field. Mapping profit requires knowledge of site-specific costs and revenues, including yield and price. Price varies site-specifically because fiber quality varies, so mapping fiber quality is an important component of profit mapping. To map fiber quality, the harvest location of individual cotton bales must be known, and thus a system to track the harvest location of cotton modules must be available. To this end, a wireless module-tracking system was recently developed, but automation of the system is required before it will find practical use on the farm. In Part 1 of this report, research to develop automatic triggering of wireless messages is described. In Part 2, research to enable the system to function with multiple harvesting machines of the same type in the same field - a common situation in commercial cotton farming - is described along with testing of the entire automated wireless module-tracking system. To automate wireless-message triggering, a sensing and control system was added to a harvester to indicate when the machine is dumping a basket load of cotton so that wireless messages can be automatically sent from the harvester to subsequent field machines. This automated system was incorporated into the existing wireless module-tracking system, field tested, and it ultimately operated as designed, without human intervention. Linking data collected with this system together with cotton classing data enabled the creation of fiber-quality maps.     

Soil and Weed Survey for Spatially Variable Herbicide Application on Railways

Weed control on railways is frequently done by herbicide application, using large amounts of chemicals and labour. Only a few hectares of surface area on a railway can be many kilometres long so high levels of spatial variability of soils and weeds are expected. Railway sprayers use similar technology to crop sprayers so it is possible to adopt concepts from precision agriculture for weed control. The objective of this study was to evaluate spatial variability of soils and weeds on railways in order to define weed control strategies and basic characteristics of a railway sprayer. This work is part of a research project aiming at the development of a system for spatially variable herbicide application on railways. Soil and weed data were collected from five different railway companies in Brazil. These data were used to simulate treatment maps based on weed control strategies and to estimate technical requirements for spatially variable herbicide application. The results showed that soil and weed survey gave important information for defining weed control strategies and spraying equipment. The sprayer must treat the three swaths (left, central and right parts of the railway surface) separately applying at least two different herbicides at the same time. On average, a variable dose rate application based on the treatment maps generated in this work could save up to 59% of herbicides.