2.5MW风机齿轮箱的断齿故障特征量提取方法研究

齿轮箱是风力发电机组中的核心部件,同时也是风力发电机组中故障率较高的部件之一。本文建立了2.5MW风机齿轮箱FZCR2500的刚柔耦合模型,并对传动系统的一级传动关键部件进行了静强度校核;建立了一级传动系统的断齿故障模型,基于有限元对其进行了瞬态动力学分析,通过EEMD对加速度信号进行分解,找出了对断齿故障比较敏感的特征量-峭度指标,为断齿故障诊断与分析提供理论依据。     

MILITARY SPENDING,THREATS AND STOCHASTIC GROWTH

This paper analyses the impact of home military spending and foreign military threat on economic growth in a stochastic endogenous growth model involving the supply‐side and demand‐side effects produced by military spending. The paper states that an increase in home military spending affects economic growth through three channels, including the crowding‐out effect, the spin‐off effect, and the resource mobilization effect. The net effect which depends on these three channels is ambiguous. Hence, we demonstrate that there exists an optimal defence burden that maximizes the economic growth rate. Furthermore, the optimal defence burden depends on the degree of risk preference. Namely, the optimal defence burden of the risk‐loving agent is more than that of the risk‐neutral agent, and in turn is more than that of the risk‐averse agent. At the same time, we prove that the relationship between the volatility in military spending and economic growth also depends on the degree of risk preference. In addition, we show that greater volatility in foreign military spending leads to a decrease in home aggregate consumption, and hence speeds up economic growth in the home country.     

365kA电解槽石墨化阴极炭块生产实践

介绍了石墨化、石墨质、无烟煤基炭块的特点,并通过在同一系列不同的两个厂房对石墨质炭块与石墨化炭块技术参数,生产指标进行对比分析,发现石墨化炭块在生产使用中具有一定的优势,对今后电解生产有一定指导意义。     

Inflation and Economic Growth in China： An Empirical Analysis

Using official provincial data for gross provincial product, consumer price index and other explanatory variables from 1986 to 2006, the present paper investigates the nonlinear effects of inflation on economic growth in China. The main finding of the study is that the inflation threshold effect is highly significant and robust in China. Above the 2.50 percent threshold, every 1‐percentage point increase in the inflation rate impedes economic growth by 0.61 percent; below this threshold, every 1‐percentage point increase in the inflation rate stimulates growth by 0.53 percent. This indicates that high inflation harms economic growth, whereas moderate inflation benefits growth. We suggest that China should maintain a moderate inflation rate for long‐run growth.     

论经济长期稳定增长前提下的人民币汇率改革

本文首先提出人民币汇率改革应明确一个前提：人民币汇率政策的目标是,使汇率服务于我国经济长期稳定增长的需要。在具体分析了人民币汇率与几大宏观经济目标的关系后,接下来阐述了人民币汇率改革的方向：一是在汇率形戍机制上,随着我国金融体制改革的不断深化,逐步加大人民币汇率的浮动弹性,实现真正的以市场供求为基础的有管理的浮动汇率制度;二是在汇率水平上,与我国经济增长相伴随,实现人民币汇率水平的稳中有升。本文进一步探讨了人民币汇率改革的阶段性目标。最后,针对当前人民币汇率改革面临的问题,笔者提出了相关政策建议,以求实现更为合理的人民币汇率形成机制,从而为人民币汇率改革长期目标的实现打下基础。     

耕地征收最优规模的理论与实证研究 ——基于边际理论视角

研究目的：针对当前盲目征收耕地的现象,探讨耕地征收最优规模测算方法,为科学调控耕地征收提供参考依 据。研究方法：生产函数模型与面板计量方法。研究结果：2005—2010年耕地征收实际规模从过度征收逐步趋近于最优规模;“十二五”期间需新增耕地规模为153.27万hm2。研究结论：（1）基于边际理论视角测算耕地征收最优规模的方法具有科学性和可操作性,可为各地合理确定耕地征收规模和土地利用总体规划修编提供参考;（2）保障粮食安全前提下的耕地效益最大化是确定当前最优征收规模的标准;（3）提升耕地的边际效益是解决当前耕地保护与建设用地扩张矛盾的关键。     

组织场域、制度约束与银行业战略选择——立足于组织社会学的分析

笔者从制度理论的视角来考察银行的战略选择.以交通银行重新组建以来所经历的若干次重大战略选择为分析对象.着重探讨其中制度因素对企业战略选择的影响,并尝试性地给出一个场域-制度-战略互动模型,提供一个解释框架.     

The impact of minimum wages and foreign domestic workers in Taiwan

The purpose of setting the minimum wage is mainly to protect the rights and interests of vulnerable workers and to enhance productivity of labour. In this paper, an attempt has been made to explore the effect of the upwards adjustment of the minimum wage in Taiwan on the inflation rate, the unemployment rate, labour productivity, economic growth and other macroeconomic variables by means of an analysis of empirical data using a structural vector auto‐regressive model. The findings of the paper show that upwards adjustment of the minimum wage in Taiwan will not intensify the unemployment rate. On the contrary, it will help to promote labour productivity to an extent that will have a positive effect on the economic growth rate. In addition, this paper investigates, long‐term care system should incorporate the foreign domestic worker labour pool, which could provide the additional personnel necessary for the nation's long‐term care. Minimum wage should apply to foreign domestic workers, and foreign domestic workers should not be treated as a separate group of workers in minimum wage policy.     

提高铁塔放样合格率

放样是根据设计院来图,运用放样软件或计算方法,校核构件结构尺寸,处理构件间的位置关系,然后作出铁塔零件加工图。铁塔放样作为保证铁塔产品出厂质量的第一道工序,地位极其重要。2008年冰冻灾害之后,各设计院对铁塔结构设计更为严格,新出图的铁塔结构比往年的都要复杂,而客户对于铁塔产品的质量也提出了更高的要求。对此,铁塔放样合格率的提高非常有必要。文章针对铁塔放样合格率进行分析探讨,找出提高铁塔放样合格率的方法,以提高铁塔产品的质量。     

Correction: Managerial incentives and stock price dynamics: an experimental approach

Experimental Economics - Typo error noticed by author in acknowledgement.