七元素调控宏观经济     

盛平兴  张晨 《商丘师范学院学报》2005,21(2):78-82

经济哲学与宏观经济调控方略在经济发展中的重要性显而易见．回顾经济学流派的各种经济政策展示了调控的显著性，在当今国际经济一体化过程中，宏观经济政策的贫乏越加显现出来．创新是首要任务．以宏观经济指标理论，政策性和阶段性的宏观调控策略．宏观经济良性循环三大任务为综合目标的七元素调控宏观经济的数学模型是三率调控宏观经济的进一步深入和细致，我们分析了税收，存款利率，贷款利率，汇率，货币发行量，国债发行量，财政预算七元素与30个宏观经济指标变量间的经验关系，并由此建立粗略的阶段性的效益矩阵作为决策的基础．利用宏观经济指标对经济的贡献率确定加权系数，并建立线性的目标函数并求出离散组合优化值，为中国宏观经济的发展献一点调控策略。供政府部门的决策者参考．  相似文献   

计算机补码概念探究     

杨学颖  周建业 《河南职业技术师范学院学报》2011,(3):90-94

计算机补码表示法是计算机相关原理的重要知识点,更是计算机运算方法乃至运算器设计的基础.采用类比法,结合日常生活中的实例和计算机硬件特点,从＂模＂的概念入手,依次从补码概念的引入、补码的性质、由补码求真值的方法和引入补码的真正意义四个方面对计算机补码的概念进行了探究.  相似文献   

海水冻融和侵蚀耦合作用下混凝土破坏面演化模型     

张峰  李树忱  叶见曙  李守凯 《东南大学学报》2011,(2):206-209

为了有效评估海水冻融与侵蚀后混凝土的力学性能,基于大型静态和动态刚度伺服压力机进行了混凝土冻融和海水侵蚀后的力学性能试验.对混凝土进行了50,100,200和300次冻融循环,并配置了人工海水;选择了合理的干湿循环机制,对冻融后的混凝土试块进行了10,20,30,40,50和60次干湿循环.对混凝土弹性模量和抗压强度退...  相似文献   

Global existence and blow-up of solutions to reaction-diffusion system with a weighted nonlocal source     

蒋良军  王悦生 《上海大学学报(英文版)》2011,15(6):501-505

In this paper, we study a semi-linear reaction-diffusion system with a weighted nonlocal source, subject to the null Dirichlet boundary condition. Under certain conditions, we prove that the classical solution exists globally and blows up in finite time respectively, and then obtain the uniform blow-up rate in the interior.  相似文献   

模糊综合评判的神经网络方法在损害分析中的应用   总被引：4，自引：0，他引：4  

隋伟莹  王明明  邹开其 《大连大学学报》2004,25(6):16-18

本文针对反倾销中损害案件的调查,在满足法律条文规定的基础上,采用模糊综合评判的神经网络方法,优化损害和损害程度的综合评判模型中企业经营指标的评判指标权重,进而采用优化后的权重进行损害和损害程度的综合评判.使评判过程和结果更加具有科学性,也使反倾销损害调查的裁决更加具有公共性和透明度.此方法对政府有关部门裁决倾销和反倾销案件有一定的辅助决策.  相似文献   

基于模糊变权法的《动车组结构及原理》教学模式改革评价     

李永华  王剑  宫琦 《教育教学论坛》2020,(7):119-120

文章以《动车组结构及原理》课程为例,结合模糊层次分析法和变权综合法提出一种基于模糊变权法的教学模式改革评价方法。该方法有效降低各评价因素权重的主观性,更好地反映改革的整体评价结果,对同类课程的教学模式改革具有一定的借鉴意义。  相似文献   

Mathematical　Model　of　Weight　in　Evaluation　System     

孙璐  邓学钧 《东南大学学报》1996,(2)

ＭａｔｈｅｍａｔｉｃａｌＭｏｄｅｌｏｆＷｅｉｇｈｔｉｎＥｖａｌｕａｔｉｏｎＳｙｓｔｅｍＳｕｎＬｕ（孙璐）ＤｅｎｇＸｕｅｊｕｎ（邓学钧）（ＴｒａｎｓｐｏｒｔａｔｉｏｎＣｏｌｅｇｅ，ＳｏｕｔｈｅａｓｔＵｎｉｖｅｒｓｉｔｙ，Ｎａｎｊｉｎｇ２１００１８）Ａ...  相似文献   

Genetic analysis for brix weight per stool and its component traits in sugarcane （Saccharum officinarum）     

Liu GF  Zhou HK  Hu H  Zhu ZH  Hayat Y  Xu HM  Yang J 《Journal of Zhejiang University. Science. B》2007,8(12):860-866

Brix weight per stool (BW) of sugarcane is a complex trait, which is the final product of a combination of many components. Diallel cross experiments were conducted during a period of two years for BW and its five component traits, including stalk diameter (SD), stalk length (SL), stalk number (SN), stalk weight (SW), and brix scale (BS) of sugarcane. Phenotypic data of all the six traits were analyzed by mixed linear model and their phenotype variances were portioned into additive (A),dominance (D), additive×environment interaction (AE) and dominance×environment interaction (DE) effects, and the correlations of A, D, AE and DE effects between BW and its components were estimated. Conditional analysis was employed to investigate the contribution of the components traits to the variances of A, D, AE and DE effects of BW. It was observed that the heritabilities of BW were significantly attributed to A, D and DE by 23.9%, 30.9% and 28.5%, respectively. The variance of A effect for BW was significantly affected by SL, SN and BS by 25.3%, 93.7% and 17.4%, respectively. The variances of D and DE effects for BW were also significantly influenced by all the five components by 5.1%～85.5%. These determinants might be helpful in sugarcane breeding and provide valuable information for multiple-trait improvement of BW.  相似文献   

QTL analysis for some quantitative traits in bread wheat     

Pushpendra KG  Harindra SB  Pawan LK  Neeraj K  Ajay K  Reyazul RM  Amita M  Jitendra K 《Journal of Zhejiang University. Science. B》2007,8(11):807-814

Quantitative trait loci (QTL) analysis was conducted in bread wheat for 14 important traits utilizing data from four different mapping populations involving different approaches of QTL analysis. Analysis for grain protein content (GPC) sug- gested that the major part of genetic variation for this trait is due to environmental interactions. In contrast, pre-harvest sprouting tolerance (PHST) was controlled mainly by main effect QTL (M-QTL) with very little genetic variation due to environmental interactions; a major QTL for PHST was detected on chromosome arm 3AL. For grain weight, one QTL each was detected on chromosome arms 1AS, 2BS and 7AS. QTL for 4 growth related traits taken together detected by different methods ranged from 37 to 40; nine QTL that were detected by single-locus as well as two-locus analyses were all M-QTL. Similarly, single-locus and two-locus QTL analyses for seven yield and yield contributing traits in two populations respectively allowed detection of 25 and 50 QTL by composite interval mapping (CIM), 16 and 25 QTL by multiple-trait composite interval mapping (MCIM) and 38 and 37 QTL by two-locus analyses. These studies should prove useful in QTL cloning and wheat improvement through marker aided selection.  相似文献   

关于Hardy-Hilbert不等式的多参数推广     

隆建军 《贵州教育学院学报》2011,(12):6-9

对Hardy-Hilbert不等式进行了研究,并将其进一步改进如下：若p〉1,1/p＋1/q=1,0〈A,B≤1,an,bn≥0,使0〈∑∞n=0apn〈∞,0〈∑∞n=0bqn〈∞,则∑∞m=0∑∞n=0ambn/Am＋Bn＋1〈{∑∞n=0（π/Bsin（π/p）-（3p-B）（ p-1）/6p（2An＋）11/p）anp}1/p{∑∞n=0（π/Asin（π/p）-（3q-A）（q-1）/6q（2Bn＋1）1/q）bnq}1/q.所得结果改进和推广了最近文献的一些相应结果.  相似文献