自仿测度的谱性质

借助于测度的Fourier变换,利用Parseval恒等式,给出了谱测度得到和谐对的条件.通过讨论自仿测度的Fourier变换零点的性质,得到一个特殊的L2(μM,D)空间至多有3个μM,D指数正交系.     

关于R~n下一类L~2(μM,D)中正交指数函数个数的研究

自仿测度谱性质是自仿测度谱理论的一个重要分支,本文研究当扩张矩阵M∈Mn(R),有限数字集D■Zn时,如何判断相应的L2(μM,D)空间上的相互正交的指数函数个数的方法,是对Jorgensen和LI Jian-lin的当M∈Mn(Z),D■Zn时的相关结论的推广.     

关于L2(μM,D)上指数正交系个数的讨论

自仿测度μM.D是由｛φd(x)=M-1(x+d}d∈D惟一确定的.对于扩张矩阵M∈Mn(Z)即M=[ad bc],D={(00),(10),(20),(11)｝,且ac-bd∈2Z,通过讨论其自仿测度的Fourier变换零点的性质,得出这个特殊的L2(μM.D)空间上的指数正交系的个数.     

特定矩阵的μM,D-正交性与和谐对

联系到一个扩张整矩阵M∈Mn(Z)和一个有限数字集D (C) Zn的μM.D是一个自仿测度.采用单位根的结构形式和标准分解形式的方法,研究当| detM|=6时,μM,D-正交性与和谐对之间的特殊关系.     

一个特殊自相似分形集的Hausdorff测度的上界估计

对于一个特殊自相似分形集,分别采用构造特殊覆盖和构造密度函数2种方法,得到了其Hausdorff测度的较好上界.     

关于分数维Hausdorff测度的积分

计算了自相似的分数维集合上关于Hausdorff测度的积分,把这种集合上Hausdorff测度与具有某种不变性质的奇异测度联系起来.     

广义Sierpinski垫上正交指数函数的个数

联系到一个扩张整矩阵和一个数字集M=〔p p1 0 0 p p2 0 0 p〕,D={〔0 0 0〕,〔1 0 0〕,〔0 1 0〕,〔0 0 1〕}的自仿测度μM,D是支撑在迭代函数系{Φd(x)=M-1(x+d)}d∈D关于广义三维Sierpinski垫的吸引子T(M,D)上,且被该吸引子所惟一确定,其中p是奇数,p1,p2∈Z.利用M,D零集的性质,证明了在L2(μM,D)空间中最多存在4个相互正交的指数函数且4是最好估计.     

LF闭包空间中的几乎可数仿紧性

在LF闭包空间中的紧性研究基础上,定义几乎可数仿紧集,对其进行特征刻画,证明了几乎可数仿紧集对于Cech闭包算子的像集是可遗传的.在由F诱导出连续的L-Zadeh型函数的映射下保持性质不变,且具有弱同胚不变性质.进一步证明若(Lx,ωL(～))具有几乎可数仿紧性,当且仅当分明闭包空间(X,～)具有几乎可数仿紧性,即LF闭包空间中的几乎可数仿紧性是“L-好的推广”.     

河南省纤检所组建标仿专业队伍

棉花品级实物标准仿制工作在河南省纤检所的突出特点是,任务大;仿制时间集中;技术性要求高。因此,只依靠工,商,农的外协力量,根本没有绝对的把握和保障.像商业部门的标仿技术力量主要在基层,多居住农村,标准仿制时期,正值农业生产的黄金季节,指令性地抽调一批标仿技术骨干就十分困难,否则标仿队伍的技术素质无法控制,管理问题也不大好解决,组织工作相当困难。只能是从工业、商业、农业抽调少量的标仿技术骨干,进行技术把关。而大量的标仿技术力量要就地     

模糊关系数据库的推理方法

通过引入模糊集间的相似度 ,定义了模糊关系数据库上的mass 函数、信任测度和似然测度 ,给出了模糊关系数据库上的一类推理方法     

三元素数字集下L2（μM,D）上正交指数系的个数

自仿测度μM,D是由{φd（x）=M-1（x＋d）}d∈D惟一确定的.借助模3的剩余类,讨论矩阵M=ab0c（a,b,c∈Z,｜a｜〉1,｜c｜〉1,ac∈3Z）和数字集D=（（00）,（10）,l0}（l{0,1}）所决定的L2（μM,D）中正交指数函数的个数,以及对M=p1 m1m20 p2m30 0 p3,M=p 0 m 0 p 0 0 0 p,D={{000},{100},{100}}l{0,1}）,所决定的L2（μM,D）中正交指数函数的个数,并找出最好的估计. 更多还原     

Measuring the effect of change in selection indices

Genetic selection goals for dairy cattle, originally aimed at production traits only, have been expanded in stages over the past 30 yr to include up to 12 target traits covering production, functionality, and health and fertility. Each addition to the selection goal often involves the use of additional measured phenotypic variates. The net effect of these additions is usually described as causing change in the relative emphasis on different traits, though there are varying definitions of what this means. This paper suggests that the current definitions of this term may be inappropriate and shows that, as usually used, it tends to overstate the net effect of the changes. A new definition of the relative emphasis of each target trait is proposed. It is defined as the percentage of total economic value of genetic gain in all traits attributable to gain in that particular trait. A useful parallel statistic measures the relative contribution of each phenotypic variate recorded. The result of applying these measures is contrasted with the use of current methods using United States Holstein data.     

具有2个数字集的自仿测度μM,D正交指数函数的个数

对于由M=pIN（｜p｜〉1,p∈Z）,D={0,l1e1＋l2e2＋…＋lNeN}ZN（l21＋22＋…＋l2N≠0,lj∈Z,j=1,2,…,N）决定的自仿测度μM,D,支撑在吸引子T（M,D）上.证明当p为奇数时,L2（μM,D）空间中的正交指数函数系最多有2个元素,而且2是最好的估计;当p为偶数时,L2（μM,D）空间中存在含有无限个元素的正交指数函数系.     

Emotional responses towards food packaging: A joint application of self-report and physiological measures of emotion

In this paper we investigate consumers’ emotional responses to food packaging. More specifically, we use self-report and physiological measures to jointly assess emotional responses to three typical food packaging elements: colours (low-wavelength vs. high-wavelength), images (positive vs. negative) and typefaces (simple vs. ornate). A sample of 120 participants was exposed to mock package design concepts of chocolate blocks. The results suggest that images generate an emotional response that can be measured by both self-report and physiological measures, whereas colours and typefaces generate emotional response that can only be measured by self-report measures. We propose that a joint application of self-report and physiological measures can lead to richer information and wider interpretation of consumer emotional responses to food packaging elements than using either measure alone.     

Determination of Emulsifying Properties of Some Proteins by Conductivity Measurements

A method was developed to measure the emulsifying activity and emulsion stability of proteins using a simple apparatus consisting of a glass column with a conductivity cell. A significant correlation was observed between the emulsifying activity and emulsion stability of 10 proteins determined by the conductivity method examined in this paper and the turbidity method of Pearce and Kinsella (1978). These results suggest that the emulsifying properties can be estimated by measuring changes in the conductivity of emulsion. The advantages of the conductivity method are to measure accurately and simply the emulsifying properties of proteins, because this method directly and automatically measures changes in the physical constant (that is, conductivity) of emulsion.     

Impacts of the Doha Round framework agreements on dairy policies

Dairy is highly regulated in many countries for several reasons. Perishability, seasonal imbalances, and inelastic supply and demand for milk can cause inherent market instability. Milk buyers typically have had more market power than dairy farmers. Comparative production advantages in some countries have led to regulations and policies to protect local dairy farmers by maintaining domestic prices higher than world prices. A worldwide consensus on reduction of border measures for protecting dairy products is unlikely, and dairy will probably be an exception in ongoing World Trade Organization (WTO) negotiations. Under the Doha Round framework agreements, countries may name some products such as dairy as "sensitive," thereby excluding them from further reforms. However, new Doha Round framework agreements depart from the current WTO rule and call for product-specific spending caps. Such caps will greatly affect the dairy sector because dairy accounts for much of the aggregate measure of support (AMS) in several countries, including the United States and Canada. Also, the amounts of dairy AMS in several countries may be recalculated relative to an international reference price. In addition, all export subsidies are targeted for elimination in the Doha Round, including export credit programs and state trading enterprises, which will limit options for disposing of surplus dairy products in foreign markets. Currently, with higher domestic prices, measures for cutting or disposing of surpluses have been used in many countries. Supply control, which is not regulated by WTO rules, remains as an option. Although explicit export subsidies are restricted by WTO rules, many countries use esoteric measures to promote dairy exports. If countries agree to eliminate "consumer financed" export subsidies using a theoretical definition and measurements proposed herein as Export Subsidy Equivalents (ESE), dairy exports in many countries may be affected. Although domestic supports and export subsidies will be reduced in the Doha Round, possible exclusion of "sensitive" products from tariff reduction will help some countries' dairy sectors survive after those final agreements. A key concern for those countries will be the simultaneous restriction of surplus-disposing measures. With fewer marketing options for surpluses, countries that continue border protection and high internal prices will likely be forced to use domestic supply control programs in the future.