注塑机料筒加热节能技术

料筒加热系统是注塑机上主要耗电系统之一,行业中推出的多种节能技术方案受利益格局的影响存在误导行业 和用户的现象。针对这一局面,从节能效果、使用可靠性、安装维护方便性及性价比等要素入手,对目前行业主推的电磁 加热、红外加热、节能环3大料筒加热节能技术方案进行了应用、研究和比较,节能环技术方案具有简单有效、局限性少、 故障率低、成本低等优点,是适合注塑机生产工况要求的最佳加热节能技术方案。     

大力发展湖南省核能产业

核能产业是湖南省重点发展的战略性新兴产业,大力发展核能产业,对改善我省能源结构、加快产业结构升级、促进“四化两型”社会建设有着重要的意义。从国内外核能产业发展来看内陆核电比例占60％以上,我国核电建设突飞猛进;湖南省为经济大省,又是核工业大省,具有核电基础优势和安全的地质条件。因此,应整合优势资源,打造国家级核能产业园;支持内陆核电项目重启,增强新型工业化的推动力;促进核能产业全面发展,提升核工业大省地位;加大人才培养投入,构建核专业人才培养体系;大力宣传核电科普知识,加强核安全与公众的沟通等以加快湖南省核能产业发展。     

新能源时代中国应对美国“301调查”策略研究

美国针对中国新能源产业的“301调查”,实质是在旧有国际经济秩序暂难破除、国际新能源秩序尚未形成和多边体制威力衰落的共同影响之下,“南北矛盾”在新能源产业上的新表现。中国应“内外兼修,长短兼顾”,对外坚持构建国际经济新秩序的努力,发挥在国际新能源秩序建立过程中的主导作用,维护和推动多边体制的有效运转;对内通过完善产业发展制度,调整新能源结构,制定竞争性补贴政策,加强新能源产业行业协会建设等作以策应。     

国外能源贫困文献综述

能源贫困是世界性难题,它是发展中国家贫困的重要标志。在发展中国家,能源贫困这个问题一直困扰着国家部分地区的发展。为了可以有效地解决能源贫困的问题,本文将对能源贫困的相关文献做出总结,为决策者提供依据和基础。能源贫困是一个抽象概念,通过量化的能源贫困指数,以便定量研究能源贫困问题。本文着重对能源贫困概念的界定、衡量能源贫困度的方法、能源贫困的指标体系构建、解决途径的研究及研究方法和手段进行了简要综述。     

势能模式与内江市区位优势研究

运用潜能模式建立了城市区位优势比较的定量化模型，并对内江与绵阳、乐山的区位势能值进行了计算与比较．结果表明，内江的区位势能值明显高于划入成都平原经济圈的绵阳、乐山．由此得出结论：内江市具备四川省优先开发的区位优势条件．     

Political Economy,Ecological Modernization,and Energy Use: A Panel Analysis of State‐Level Energy Use in the United States, 1960–1990

The present study will examine energy consumption from two competing perspectives within environmental social science: political economy and ecological modernization. These frameworks will be evaluated with a fixed‐effects panel analysis of state‐level energy use between the years 1960 and 1990, based on data for 50 states plus Washington, DC, from the Energy Information Administration’s State Energy Data System. The results from the panel analysis show that the increase in total energy use between 1960 and 1990 depended on both increasing economic growth and urbanization, even after controlling for population size, industrialization, and inflation‐adjusted energy prices. The results challenge the claims of ecological modernization theory and support a political economic approach to the study of changes in energy use. In the conclusion, the study’s findings will be framed within the context of the early twenty‐first‐century economic and ecological crises. In light of efforts to reduce greenhouse gas emissions, this study can also further advance the renewable energy debate by reminding us of the social drivers of energy use.     

On a confidence interval about a parameter estimated by a ratio of normal random variables

A confidence interval is geometrically constructed about a parameter estimated by the ratio of bivariate normal random variables. The resulting confidence interval is equivalent to that of Fieller's theorem. The geometric construction shown that such intervals are conservative. Bioassay examples are used to demonstrate the technique.     

一类二阶拟线性微分方程的非振动定理

考虑二阶拟线性微分方程 :( |y′|α -1y′)′+q(t) |y|α -1y=0 ,获得了在 q(t)振动的条件下该方程非振动的一些充分 (必要 )条件 ,改进和推广了已有文献的结果     

Estimation of Correlation for Continuous Semimartingales

Abstract. In this study we are concerned with inference on the correlation parameter ρ of two Brownian motions, when only high‐frequency observations from two one‐dimensional continuous Itô semimartingales, driven by these particular Brownian motions, are available. Estimators for ρ are constructed in two situations: either when both components are observed (at the same time), or when only one component is observed and the other one represents its volatility process and thus has to be estimated from the data as well. In the first case it is shown that our estimator has the same asymptotic behaviour as the standard one for i.i.d. normal observations, whereas a feasible estimator can still be defined in the second framework, but with a slower rate of convergence.     

Serial unblocked designs balanced for correlation between neighbours,II

The theory in Part I contained an error that was inferred from the output of a program, written in SAS by Eric P. Smith and David D. Morris. The program produces random BUS designs in accordance with the algorithm of Part I. The theory is here corrected by using a combinatorial argument that involves elementary number theory. The algorithm needs no change but its interpretation is now adjusted.