经济运行的不确定性与非均衡度

讨论了经济运行的不确定性及非均衡性.利用经济学原理及模糊数学理论,得到了舍不确定性因素的非线性、非均衡的理性预期模型以及非均衡度的定义,并建立了非均衡度的Fuzzy优化模型.从而为定性研究经济运行提供了新思路.     

氢键构成的-维链状锰(Ⅲ)Schiff碱配合物[Mn(salpn)(CH3OH)(4,4'-bipy)](BPh4)的合成、晶体结构和磁性研究

合成了一个水杨醛-1,2-丙二胺Sehiff碱锰(Ⅲ)单核配合物[Mn(salpn)(CH3OH)(4,4'-bipy)](BPh4).单晶X-射线衍射结果表明,该配合物属单斜晶系,P2(1)/c空间群,晶胞参数a=1.371 7(3)nm,b-2.629 7(5)nm,c=1.358 1(3)nm,a=90 o,β=110.256(4)°,γ=90°.配合物中,中心Mn(Ⅲ)离子采取畸变的八面体配位构型,4,4'-联吡啶和甲醇分子作为轴向端基配体与Mn(Ⅲ)离子配位,单核单元之间通过氢键作用构成了一维链状结构.     

Transpiration of the tamarind artificial forest in the arid-hot valleys of Jinshajiang River,Yunnan

The transpiration characteristics of the tamarind artificial forest in the arid-hot valleys of Jinshajiang River, Yunnan were investigated through the measurement of the transpiration rate, stomatal conductance of tamarind leaf and the related envi- ronmental factors. The results showed that the transpiration of the tamarind in the clear sky had the close positive correlations with photosynthetically active radiation and air temperature and negative correlation with atmosphere moisture in the whole growth period. The daily change tendency of the transpiration rate was the similar with stomatal conductance, and the transpiration had the positive correlation with stomatal conductance. The transpiration rate of tamarind was highest in the rainy season of June and July and was relatively low in the drought season of March and April. The transpiration water consumption in rainy season of June and July was obviously higher than that in drought season of March and April. It fully suggested that the tamarind showed very good drought resistance and adaptability to the arid-hot valleys of Yunnan .     

For指令在cmd提示符下的高级应用

For指令是一个高效实用的网络管理工具。本文就For指令来展开它的实用技巧,以具体实例的方式来切实解决在日常应用中遇到的问题或技术瓶颈,借此了解For指令的强大功能。     

Subcellular distribution and compartmentalization of arsenic in <Emphasis Type="Italic">Pteris vittata</Emphasis> L.

The subcellular distribution of arsenic （As） in Pteris vittata L., an As-hyperaccumniator, was studied to determine As compartmentalization and to explore the mechanisms that confer As tolerance. When the plant was grown in a nutrient solution without additional As, most of the accumulated As was isolated to the cell wall. However, in plants growing in a nutrient solution containing 0.1 or 0.2 mmol/L As, approximately 78% of the total As accumulated within the pinna. The proportions of As accumulation in the cyto- plasmic supernatant fraction were 78 % of that in the pinna and 61% of that in the plant. In either treatment group （0.1 or 0.2 mmol/L As）, the fraction containing the lowest level of As was the organelle fraction. These results suggest that As accumulates in the pinna where it is primarily distributed in the cytoplasmic supernatant fraction. The role of As compartmentalization may be intricately linked with As detoxification in P. vittata L.     

从产业链的角度认识和分析广西电子信息产业

从产业链的角度分析广西电子信息产业发展的现状,认为广西电子信息产业的主导产品不明确,市场竞争优势不显著,尚未溶入中国信息产业链中,在技术产品结构上还处于低端,无法与产业链的高端靠拢和对接。提出广西电子信息产业发展应高度重视并大力发展电子信息产业主链条的软件和服务环节,次链条的芯片和元器件、研发和销售环节;在产业发展模式上既要实施集群战略,又要实施分工战略;产业的发展重点是抓“两个链条三大基地”,即:计算机产业链、光通讯产品产业链,基础材料及元器件生产基地、软件基地、军工电子基地。     

茂钛络合物—纳米NaH体系催化苯乙烯氢化

茂钛络合物,以纳米ＮａＨ为助催化剂催化苯乙烯氢化,初速率为３．７×１０＾３－８．３×１０＾３ｍｏｌ／（ｍｏｌ．ｍｉｎ）（Ｈ２／Ｔｉ）,催化效率为６．４×１０＾３－１８．５×１０＾３ｍｏｌ／ｍｏｌ（Ｈ２／Ｔｉ）,均高于文献的其他２茂钛催化体系,考察了不同温度对催化反应的影响,反应温度在２７５－３１５Ｋ时,活化能为２０．３ｋＪ／ｍｏｌ,与催化体系活性高一致。     

猕猴桃微量硒的测定和施加硒肥的比较研究

用DAN荧光法测定了施硒肥和未施硒肥的猕猴桃花、叶、果中硒含量,结果表明：在相同的土壤营养等条件下,施加硒肥的猕猴桃中牺含量明显比未施硒肥的猕猴桃中硒含量高,且硒在猕猴桃植株中各部位的分布为：叶＞花＞果,提示场肥叶面喷施将比上施效果显著。     

TIG焊弧光传感熔透控制的研究

熔透控制是焊接质量控制领域的一个重要的发展方向,本文提出利用弧光传感器,采用熔池谐振法对TIG焊进行熔透控制,并建立了相应的微机熔透控制系统．试验结果表明,采用该方法焊接后的焊缝成形均匀一致,具有一定的发展前景．     

管材弯曲成型过程的有限元模拟

采用拖带坐标系下的退化壳单元,以及动态显式有限元方法求解管材在弯管机上的弯曲成型问题。管材的材料特性假定满足Ｈｉｌｌ各向异性的弹塑性准则,弯管机的弯曲模和压力模波假定为刚性表面,接触力通过罚参数方法计算。通过文中的几个算例表明,该方法是有效的。