A Study on Chaotic State of EEG Signal

In this paper.the chaotic theory is described briefly and the chaotic state ofEEG on thinking are studied. In this study. the method of detecting short bursts of 40 Hz EEG ac-tivity is firstly usedto dedermine the segments to be computed for analysis of the chaotic state ofEEG. therefore the reliability and stability of the analysis results are assured In this paper.thechaotic para meters of qa n titative analysis are studied and more then 30 subjects EEG are analysedfor the value of the fractional dimension and the maximal Lyapunov exponent.The results of exper-iments indicate that the value of the fractional dimension is valuable for clincal diagnosis and themaximal Lyapunov exponent is not sufficient for dignosis of disease.     

Stomatal conductance and ozone exposure in relation to potato tuber yield—results from the European CHIP programme

Measurements of stomatal conductance on field-grown potato (Solanum tuberosum L.) cv. Bintje from the CHIP programme were combined to study the response to environmental factors. 3274 data points were used. Data were obtained from five sites: Jokioinen in Finland, Östad in Sweden, Giessen in Germany, Tervuren in Belgium and Sutton Bonnington in UK. Measurements were made in open-top chamber treatments with ozone and carbon dioxide exposure and in the ambient air. A typical light response curve was obtained with light saturation at approximately 400 μmol m⁻² s⁻¹ photosynthetically active radiation (PAR). The leaf temperature optimum for stomatal conductance was 29 °C. The stomatal conductance declined strongly at leaf-to-air vapour pressure differences >20 hPa. An elevated carbon dioxide concentration (680 μl l⁻¹) reduced the stomatal conductance by up to approximately 20%. Elevated ozone reduced the stomatal conductance towards the end of the growth period, in addition to the negative effect by ordinary senescence on stomatal conductance. A multiplicative model, based on the boundary line technique, was used to estimate the relationship between stomatal conductance and the environmental variables. Test with the data sets from two sites providing sufficient data, Östad and Giessen, showed that the multiplicative model had R²-values of 0.60 and 0.42, respectively, for the relationship between calculated and observed conductance. Test of the model with an independent data set from an open-top chamber experiment with the potato cultivar Kardal showed an R² of 0.59 between calculated and observed conductance. The conductance model was used to estimate the accumulated ozone uptake (CUO₃) by potato leaves from emergence to harvest. The relationship between CUO₃ and relative yield loss, using a threshold for the ozone uptake rate of 7 nmol m⁻² s⁻¹, provided a higher R²-value (0.45) than CUO₃ without any threshold and relationships based on the accumulated exposure over 40 nmol mol⁻¹ (AOT40) or the sum of all hourly average ozone concentrations exceeding 60 nmol mol⁻¹ (SUM06). All four relationships were however statistically significant.     

Analysis on 40 Hz ERP During Brain Transient Cognitive Performance

In this investigation 50 normal subjects were observed. Activities of EEG of 8 areas on both hemisphere during six different states were recorded. The author analyzed time ( T ), area( A ) and amplitude ( Amp ) of burst 40 Hz ERP recorded during different states and investigate the correlation's between 40 Hz ERP and age, sex,education background and scores of IQ. The time, area and amplitude of burst 40 Hz ERP are all significantly lower during rest states than those during orientation test, calculation test and visual spatial task test. During thinking process the increase of burst 40 Hz ERP is positive correlated with the scores in MMSE and WAIS. T is the most stable and sensitive marker. A affected by T and Amp, is stable but less sensitive than T. Amp is less sensitive than T and A.     

A Study on the Method of Extraction for 40 Hz EEG Bursts

The bursts of 40HzEEG are a reliable indicator of the " focused arousal ". It hasan active significance in diagnosis of cognitive dysfunction.But, the bursts of 40 Hz EEG are seriously interfered by the high amplitude broad-band EMG signals from the scalp. It causes the difficulty of detection, This paper give a new method uf the combination of threshold extraction in frequency domain and neural network pattern recognition to realize the effective detection of 40 Hz EEGbursts , and reports the mean peak power of the 40 HZ EEG bursts for 11 subjects and analyses theirthinking states, The reaults indicate that the method given in this paper can be used feasibly and support the theory given by D,E, Sheer.     

ERP系统中设备维修计划的研究

目前,依靠计算机软件,对制造企业中设备的管理已经达到了很普遍的程度。设备管理的内容不仅全面,而且管理的侧重点明确。为此,简要介绍了作为ERP管理系统中的子系统-设备管理系统的主要目标;着重讨论了设备管理系统的管理重点—维修计划新思想的形成以及制定维修计划的步骤。     

浅谈ERP在农业企业中的应用

我国拥有数量庞大的农业企业，农业企业在我国国民经济中发挥着重要作用。实现农业企业信息化，提高农业企业的市场竞争力非常重要。实施ERP是提高农业企业竞争力的一种可行手段。     

中国家具制造业信息化进程

本文重点阐述了中国家具制造业信息化的重要性、研究现状和发展趋势，并探讨了实现中国家具制造业信息化的基本途径。在当前“以信息化带动工业化，以工业化促进信息化”、“用高新技术和先进适用技术改造提升传统产业”的宏观背景下，中国家具制造业信息化进程势在必行。     

脑部特异表达SV40Tag转基因动物模型的建立

将猿猴病毒抗原蛋白(SV40Tag)片段克隆进脑部特异表达载体pMM279中,通过显微注射法制作转基因小鼠。采用PCR和Southern blotting检测目的基因整合,并通过RT-PCR检测目的基因的表达。结果表明:共出生29只仔鼠,经PCR检测出3只阳性,Southern blotting检测出2只阳性。RT-PCR检测到SV40Tag仅在前脑部皮层和海马表达。成功获得的脑部特异表达SV40Tag转基因小鼠模型,为SV40Tag的致病机制及脑肿瘤的治疗等研究提供工具。     

谷子EMS矮秆突变体的产量性状分析

为丰富谷子遗传多样性和突变体库材料,本研究采用1%浓度的甲基硫磺乙酯(EMS)诱变晋谷40号 10 h, 在谷子生育期间对突变体M1和M2代材料进行表型性状调查。结果表明,共获得332株表型差异突变型单株,这些突变体类型主要包括株高、穗型、茎粗、育性、刚毛、抗拿扑净、颖壳色、抽穗期、穗轴、粒色、穗紧实度、抗逆性、穗重等;对数量性状的表型指标进行变异分析,其中株高的变异系数最大,为41.25%,抽穗期的变异系数最小,为11.03%;对20份矮秆突变体材料进行产量性状分析,发现E-13、E-58和E-98可作为矮秆、早熟、高产的材料;突变体中发现褐米色、抗拿扑净等优质、适宜产业化的材料。本研究构建的谷子突变体库具有丰富的突变类型,为谷子分子遗传学和育种提供了优异的基础材料。     

二系稻N31S／P40（F1）改变库／源比对叶片衰老及同化物分配的影响

在开花期，通过剪去１／２左右颖花和剑叶以下叶片来改变库／源比，研究了改变库／源比对二系稻Ｎ３１ｓ／Ｐ４０（Ｆ_１）剑叶光合速率，叶绿素、可溶性蛋白及的ＤＡ含量，光合同化物从剑叶的输出和在稻穗中的积累，茎鞘中糖含量的变化的影响。处理后７ｄ的光合速率差异明显，去１／２颖花量的降低光合速率，而剪叶的则提高光合速率，但处理１４ｄ后则处理间无差异。剑叶叶绿素、可溶性蛋白和ＭＤＡ含量处理间差异均不显著。因此，改变库／源比并不影响二系稻Ｎ３ＩＳ／Ｐ４０剑叶的衰老行为。但是，改变库／源比后茎鞘糖含量的变化差异明显。疏花的茎鞘可溶性糖含量高于对照，而剪叶处理的则低于对照。淀粉含量处理间差异不明显。剪叶提高乳熟期剑叶光合同化物在穗中的分配，疏花则降低在穗中的分配，但疏花提高了光合同化物在茎鞘中的分配。