“自动刹车不预位灯亮”且无故障信息的分析

本文通过对737NG系列飞机自动刹车系统原理介绍为出发点,结合作者在国航重庆维修基地工作多年的排故经验,针对经常出现的"自动刹车不预位灯亮"且无故障信息这一无法依据FIM手册进行排故的特殊情况,总结出了一套切实可行的快速判断方法,供大家研究讨论。     

考虑批量订货的易腐农产品配送中心选址方法

为提高物流管理绩效、降低物流运作成本,考虑到配送中心的批量订货和作业能力限制,建立了易腐农产品配送中心选址问题的0-1整数非线性规划模型,并利用Lingo 9.0软件进行了模型求解.利用该模型可以确定配送中心的位置和各配送中心与零售店之间的配送关系,并可得到配送中心的订货周期和订货批量.最后,通过算例验证了模型的有效性.     

Trajectories in human domination of ecosystems: Human appropriation of net primary production in the Philippines during the 20th century

The “human appropriation of net primary production” (HANPP) has been suggested as a comprehensive indicator to measure impacts of human land use on ecosystems. It accounts for (a) human-induced changes in biological productivity and (b) biomass harvest. This study presents an analysis of aboveground HANPP in the Philippines between 1910 and 2003, a period characterized by massive deforestation and increases in land use intensity and biomass extraction. Results show a steep increase of aboveground HANPP from just below 35% of potential productivity in 1910 to slightly above 60% in 1970 and constant values since then. Large-scale changes in land cover and agricultural practices were the main direct determinants of this trajectory in HANPP. Remarkably, HANPP grew at much slower pace than population did: While the amount of NPP appropriated by humans doubled throughout the period, population increased by a factor ten. Increasing efficiency in terms of biomass extraction per unit of area, relying on ever-increasing inputs, and changes in the nation's physical biomass trade balance were of major importance for this difference in growth rates. In the coming decades, the Philippines will have to face the challenge to meet increases in biomass demand without putting even higher strains on the ecosystems.     

关于“十五”计划的几个问题

《国民经济和社会发展第十个五年计划纲要》准确反映了党的十五届五中全会提出的大政方针、发展目标、重大任务和主要政策措施,充分体现了国家战略意图,是我国国民经济和社会发展的行动纲领。     

组织决策的理性限制及其修正——兼谈员工参与决策对组织绩效的影响

本文分析了高效的组织绩效对组织决策的理性要求及这种理性要求的现实可行性 ,指出由于人类的理性有限及组织决策依赖于决策的制定者和实施者 ,所以组织决策也有其理性限制 ,要求完全理性的决策是不现实的。并在分析的基础上提出 ,可以通过扩大组织决策的理性边界及其可实现性来提高组织绩效。最后 ,对员工参与决策的实现提出了可操作性的建议。     

Spillovers in Exchange Rates and the Effects of Global Shocks on Emerging Market Currencies

This paper provides an investigation into the spillover effects of exchange rate returns and volatility for developed and emerging market currencies, using data from 1997 to 2011. The results suggest that spillovers in exchange rate returns have increased steadily over time, in moderate reaction to economic events. In contrast, spillovers in total observed volatility (measured by squared returns) react more strongly to economic events, and this transmission has remained at a relatively high level since the global financial crisis. Furthermore, over the course of time, global shocks would appear to account for a larger proportion of aggregate exchange rate volatility (and the relative importance of domestic shocks has declined). The paper also considers whether the increase in volatility spillover is due to sudden shocks, or whether it is due to changes in the stochastic trend of the underlying volatility process. The results suggests that in most cases, this increase is due to sudden shocks, however, in certain instances country‐specific events may perpetuate changes to the trend of the underlying volatility spillover.     

初选阶段知识联盟成员评价与选择模型

根据知识联盟成员选择与形成的实际过程,将知识联盟成员的选择分为初选和谈判(精选)两个阶段。在综合国外联盟实践经验及影响联盟成败的实证性研究结论的基础上,分析了知识联盟成员初选阶段影响联盟成败的关键变量,以此构建了知识联盟成员初选模型,并依据指标间的相互关系,提出了基于二值变量的初选阶段评价方法。     

The (Dis)Advantage of Friendship on Information Search and Satisfaction

Across four experiments, and focusing on consumer behaviour in a high uncertainty market (i.e., a used car market), this research shows that prior to a purchase, buyers are less motivated to search for information when they purchase a product from a friend (compared to someone they do not know). We also show that buyers are more willing to search for information after a transaction when sellers are their friends, a reversal in search behaviour due to the greater social risk that buyers bear when dealing with a friend. Finally, this research shows that both the transaction outcome (i.e., positive versus negative) and the buyer–seller relationship determine the degree to which people are satisfied or dissatisfied with a seller. Copyright © 2018 ASAC. Published by John Wiley & Sons, Ltd.     

Age‐Dependent Increasing Risk Aversion and the Equity Premium Puzzle

We introduce a new preference structure—age‐dependent increasing risk aversion (IRA)—in a three‐period overlapping generations model with borrowing constraints, and examine the behavior of equity premium in this framework. We find that IRA preferences generate results that are more consistent with U.S. data for the equity premium, level of savings and portfolio shares, without assuming unreasonable levels of risk aversion. We find that the relative difference between the two risk aversions (how much more risk‐averse old agents are relative to the middle‐aged) matters more than the average risk aversion in the economy (how much more risk‐averse both cohorts are). Our findings are robust with respect to a number of model generalizations.     

斜拉-刚构组合体系桥零号块空间应力分析

以河谷汉江公路大桥斜拉桥主桥部分作为依托工程,针对其零号块空间受力问题,采用有限元软件midas FEA建立零号块有限元模型并进行相应分析.以施工过程中成桥运营阶段最大弯矩工况、最大剪力工况以及施工阶段最大双悬臂工况为控制计算工况,分析3种工况下零号块最不利内力情况.研究表明,在现有的设计条件下,结构受力可满足规范要求,相应的设计细节可为类似的工程提供借鉴.