企业科学决策中的一种优化分析新方法及其应用

将多指标优选Fuzzy动态聚类分析方法应用于企业综合实力与活力评价的科学决策,有效地克服了传统聚类分析的缺陷,建立了一个能充分挖掘企业生产潜力与提高企业活力的多指标优选Fuzzy聚类分析最佳模型,为调整产品结构的最佳时机与保持产销两旺的最好势头提供了最优科学决策.     

原始生命活力的精灵--梅里美《卡门》的文化意蕴之阐释

梅里美的小说《卡门》一百多年来之所以能在全世界持续地引起巨大反响,原因就在于它以绝妙的艺法揭示了世俗道德法律的理性约束与生命原始活力的无羁冲动、世俗婚恋道德的规范制约与生命之恋的自由任意之间不可调和的矛盾冲突。     

Holocene palynological records and their responses to the controversies of climate system in the Shiyang River drainage basin

The Shiyang River drainage basin is located in the northwest margin of the Asian monsoon region. Previous studies reached different conclusions about Holocene climatic changes in the basin. Some studies suggested the Holocene climatic changes were mainly controlled by the Asian monsoon and that the climate was relatively humid during the early Holocene (11.6-7.1 cal ka BP). Other studies found the mid-Holocene Climatic Optimum (7.0-5.0 cal ka BP), and this climate condition was similar to the Holocene westerly wind pattern in arid Central Asia. The modern climate is affected by the Asian monsoon and westerly wind in the drainage basin, and the Holocene climatic records showed two different Holocene climatic patterns-a westerly wind pattern and monsoonal pattern. However, it remains unclear what caused the two different Holocene climatic patterns to co-exist in the region. The palynological records are the main evidence for the Holocene climatic changes in the basin. This paper focuses on palynological records for different parts of the drainage basin. Among them, QTH02, QTL-03 and Sanjiaocheng records are located in the terminal lake, and the Hongshuihe record is located in the middle reaches of the basin. In the terminal lake, the palynological records of QTH02 and QTL-03 are similar, but the Sanjiaocheng record differs. The difference is mainly affected by the variable pollen assemblages in the different locations of the lake basin. From comparison and synthesis of the four palynological records, we concluded that the millennial-scale Holocene climatic changes were affected by the combined effects of the Asian monsoon and westerly wind in the drainage basin, which show the complicated Holocene climatic pattern in the northwest margin of the Asian monsoon.     

一个关于经济外部性的错误模型

文献[2]给出了一个十分特殊的关于经济外部性的模型．并由这个模型导出了一些奇怪的结论．事实上,这些不正确的结论正是源于文献[2]的作者在其模型中对MCR曲线给出的两个解释．其一．MCR曲线表示“为降低污染所花费的边际成本”;其二,又将其“解释为降低污染给社会带来的边际利益曲线,因为农民将从降低污染中受益”．这种将成本与收益混淆起来的逻辑错误,使得整个模型及其结论都是不成立的．     

6种番茄种质花粉活力的鉴定

通过对新引进的 6种番茄种质的花粉萌发率和花粉管长度进行观察测定 ,鉴定了各种质不同开花时期的花粉生活力 ,为确定采集这些种质花粉的最佳时期提供了依据 ,也为利用这些种质作为亲本进行杂交育种提供了理论基础     

A new area in the brain associated with learning and memory

A new subdivision, named marginal division (MrD)> consisting of spindle-shaped neurons, has been identified at the caudomedial margin of the neostriatum in the brains of the rat, cat, monkey and human. It is distinguishable from the rest of striatum by special neural connections and many intensely expressed neuropeptides and some monoamines in the fibers, terminals and neuronal somata. Three-dimensional reconstruction of the rat brain reveals that the MrD is a flat pan-shaped area between the neostriatum and globus pal-lidus. Chemical lesions of bilateral MrD in rats will result in severely impaired learning and memory functions, as was demonstrated by double blind Y-maze test. The function of MrD has been shown to be associated with learning and memory by functional magnetic resonance imaging (fMRl) technique in human brain in vivo . Functional neuronal connections are observed between the MrD and hippocampus, amygdala, as well as the basal nucleus of Meynert by chemically induced c-Fos immunohistochemical staining. MrD is a newly discovered part and a universal structure in the neostriatum of the mammalian brain. MrD might very possibly play an important role in processes of the learning and memory.     

On the Effects of Central Japan Expressway＇s Commuter Toll Discount Policy in Nagoya Area

Road pricing policies have two equally important objectives that have to be considered： the optimal use of the road network and the fiscal sustainability for the management of the network. The aim of this work is to examine the effects on these two objectives of a recent pricing policy implemented in Japan＇s expressway networks. Recently the Nippon （Japan） Expressway Companies （NEXCO, operators of Japan＇s nation wide expressway network） have implemented several toll discount policies for users equipped with electronic toll collectors （ETCs）. One of the policies is the commuter discount policy that discounts 50% for a journey on the NEXCO expressway no longer than 100 km during the commuting peak hours. This paper examines its effect on congestion reduction in the road network of Nagoya area and its influence on the use of expressways operated by another major local public expressway company in Nagoya. The congestion easing effect of this policy is compared with a potential marginal cost pricing scheme. These observations suggest that policy coordination regarding toll levels is needed for expressway corporations and transportation authorities for improving transportation efficiency of utilization of the whole network.     

二维相关性的几个问题

本文首先证明了边缘分布不能决定联合分布这个基本事实.然后证明了若一维分布F(x)和G(y)的方差非零且有限,则一切以它们为边缘分布的随机向量(x, y)的相关系数组成的集合是闭区间〔a, b〕,-1≤a相似文献   

高强混凝土偏心受压短柱承载力的计算

在不同强度等级的高强混凝土和配筋率的偏心受压短柱试验基础上，通 过对高强混凝土极限压应变的取值、受压区混凝土应力－应变曲线形式的选 取及等效应力图形简化处理，建立起一套计算方法，并推导了相应的计算公 式．本计算方法，对工程设计和计算具有一定理论和应用价值．     

销售电价设计的会计成本方法

引入一种会计成本定价方法,可以针对不同供电类型的用户设计不同的电价,尽量避免不同用户之间的补贴.从而通过电价来实现电力市场公开、公平、公正的原则,具体到销售环节就是根据供电成本的构成,设计公平、简单、实用的销售电价体系.