大花蕙兰快速繁殖技术的研究

本文对大花蕙兰外植体消毒方式,原球茎增殖的培养基,大花蕙兰无根茵诱导生根培养基三个方面进行了系统的研究。结果表明：外植体在用A．1％Tween-60的1％HgCl2溶液消毒8分钟效果最明显,利于原球茎增殖的培养基为MS＋6-BA1．0mg／L＋NAA0．5mg／L,增殖系数为3．97,最佳的生根培养基为MS＋NAA0．2mg／1＋GA1．0mg／1＋香蕉泥150g／L,生根率最高可以达到100％。     

关于闭子模的零化子条件

主要研究闭子模都是零化子的模与环,即闭偶模与闭偶环,刻画了闭偶模和闭偶环,给出了n阶矩阵环Mn(R)为闭偶环的一些等价条件,证明了环R是右非奇异右扩张环当且仅当R是右闭偶Baer环。     

关于n进制中一个数论函数均值的计算

研究了n进制非零数字之积函数均值的计算公式问题,采用初等方法,运用猜想、归纳、递推的办法.给出积函数均值的定义,得出了Smarandache问题中n进制非零数字之积函数三次均值的精确计算公式.解决了美籍罗马尼亚数论专家F.Smarandache教授著的Only problems,not solutions一书中的部分问题,对于Smarandache问题中的积性函数理论的研究起着重要的作用.     

Disturbance rejection control based on acceleration projection method for walking robots

This paper presents a disturbance rejection scheme for walking robots under unknown external forces and moments. The disturbance rejection strategy, which combines the inverse dynamics control with the acceleration projection onto the ZMP （zero moment point）-plane, can ensure the overall dynamic stability of the robot during tracking the pre-computed trajectories. Under normal conditions, i.e., the system is dynamically balanced, a primary inverse dynamics control is utilized. In the case that the system becomes unbalanced due to external disturbances, the acceleration projection control （APC） loop, will be activated to keep the dynamic stability of the walking robot through modifying the input torques. The preliminary experimental results on a robot leg demonstrate that the proposed method can actually make the robot keep a stable motion under unknown external perturbations.     

环北部湾与大西南联合开发开放——粤西与大西南协调发展的构想

本文基于粤西与大西南的自然综合体，寻求环北部湾与大西南的大区域开发和发展。对粤西与大西南的联合开发开放的依据和可行性进行了分析，提出了联合开发开放的目标与思路、产业选择与区域布局，从联合开发开放的保障机制角度提出了一些政策建议。     

从三堂街话中古全浊声母字读音看喻母的来源

中古声母中的全浊音到了《中原音韵》时代全部变读为相应的清音声母。其规律是,原全浊塞音与塞擦音平声字归同部位的次清音、仄声字归同部位的全清音、擦音多清化为同类清音。这一规律在浊音发生清化的方言中大都适用,但在湘方言三堂街话中,中古全浊声母多读为零声母。这与浊音清化的规律不符,也与湘方言其他地方读音相异。这是声母受主元音或介音的影响,或同化或异化的结果。这一特殊音读现象有助于我们重新探讨中古喻母的来源。     

Impact of festival factor on electric quantity multiplication forecast model

This research aims to improve the forecasting precision of electric quantity. It is discovered that the total electricity consumption considerably increased during the Spring Festival by the analysis of the electric quantity time series from 2002 to 2007 in Shandong province. The festival factor is ascertained to be one of the important seasonal factors affecting the electric quantity fluctuations, and the multiplication model for forecasting is improved by introducing corresponding variables and parameters. The computational results indicate that the average relative error of the new model decreases from 4.31% to 1.93% and the maximum relative error from 14.05% to 6.52% compared with those of the model when the festival factor is not considered. It shows that introducing the festival factor into the multiplication model for electric quantity forecasting evidently improves the precision.     

有限的概念术语 无限的发展前景——论王希杰先生的"三一"修辞学理论

当代语言学、修辞学大家王希杰先生的“三一”修辞学理论，反愉部修辞学的问题建立在以下三组概念之上：四个世界、零度和偏离、显性和潜性。这个理论体系抽象出了当代修辞学最重要最基本的概念，提高了 修辞学的科学品位和社会功能，因此，可望为21世纪的修辞学研究带来无限广阔的发展前景。     

S-单式环的交换性条件

本文证明了如果R是一个s-单式环,且满足条件:1.?x,y∈R,存在不全为1有有界正整数k=k(x,y),s=s(x,y),t=t(x,y)使得(xy)~k=x~sy’,(xy)~(k+1)=x~(s+1)y~(t+1);2.R的所有幂零元素集合N是p-扭自由的,这里p是诸s和t的最小公倍数,则R是交换环。     

全光波长变换器及其在光网络中的应用

All optical network (AON) is a hot topic in recentstudies of optical fiber communications . Key tech-niques in AONinclude optical switching/routing,opti-cal cross connection ( OXC) , all optical wavelengthconversion (AOWC) ,all optical buffering,etc. Opti…