纸张复卷机的设计造型与仿真

本论文介绍了下引纸复卷机的方案,针对关键部件底辊进行了设计计算,用UG软件完成了整机三维造型,并结合3DSMAX实现了复卷过程的仿真。     

Volatifity spillovers on precious metals markets and the G-7： The effects of the Asian crisis

This paper investigates the nature of volatility spillovers between stock returns and precious metals returns for the G-7 countries over the 1995-2006 period. We divide our sample into a number of sub periods, prior to, during and after the Asian crisis, with the objective to provide a wide analysis of the behaviour of these two markets taking into account the effects of the Asian crisis; We use EGARCH modelling, which takes into account whether bad news has the same impact on volatility as good news. The results show that there is no evidence of volatility persistence from stock returns to precious metals returns, but overall the results are significant in the other way around. In terms of volatility spillovers effects, the main findings are that there is evidence of volatility spill over running in a bidirectional way in almost all the cases. And finally, the results from asymmetric spillovers effects show that negative news has a stronger impact in these financial markets than positive news.     

基于三维激光扫描的钢板组合梁结构检测方法

针对钢结构桥梁的传统尺寸检测工作存在数据获取效率低、实地操作困难和检测精度不高等问题,结合三维激光扫描技术,给出一种基于三维激光点云数据的钢板组合梁构件多部位尺寸无损检测方法.主要步骤包括扫描设计、点云获取、点云预处理及配准、截面获取与尺寸检测.以某高速公路桥梁工程钢板组合梁结构检测为例,分别对比了传统尺寸检测方法和本文方法.实验表明该方法具有无接触测量、高可靠性和检测范围全面的优势.     

Long‐run Effect of the Global Financial Crisis on Singapore's Tourism and the Economy

This study employs recent Singaporean tourism survey data, the updated Singaporean input–output tables and a computable general equilibrium model to gauge the long‐run effects of the 2008 global financial crisis and selected policy responses. The simulation results suggest that the global financial crisis has had mild negative long‐run effects on the overall development of Singapore's economy, and that the GST deduction policy ought to offset this negative effect.     

基于ADAMS/View的双横臂独立悬架的运动学仿真分析

采用虚拟样机技术,借助于ADAMS/View软件这个操作平台,针对某轿车的双横臂独立悬架建立了多体动力学模型并对其进行运动学仿真分析,获得了前轮定位参数(前轮外倾角、前轮前束值、主销内倾角及主销后倾角)随车轮上下跳动的变化规律,为汽车悬架系统的优化提供了良好的理论依据。     

社会资本和供应链整合对产品创新的影响研究--基于中国实证调查的中介效应模型

文章提出了社会资本、供应链整合以及产品创新之间关系的结构模型。在中国大陆十三个省市四个行业的280家企业做了实证调查研究,运用SPSS和AMOS软件检验了社会资本对供应链整合和产品创新的逻辑关系。研究结果表明,供应链上制造企业进行产品创新项目的实施中,社会资本积极影响供应链整合和产品创新,并且供应链整合在社会资本对产品创新的影响关系中起着积极显著的中介作用,从而为企业提升产品创新能力提供理论基础和实施途径。     

我国农产品质量安全中的道德风险问题研究

加强农产品质量安全事关人民群众身体健康以及社会稳定。基于制度和行为主体视角,通过对农产品生产和流通微观主体风险行为进行深入研究,发现制度缺位与行为失范是农产品质量安全道德风险产生的重要原因。因此,加强道德建设、完善制度规范、协调监管体系、平衡权利渠道等完善市场体系的措施,有利于保障农产品质量安全。     

A new methodology for the logistic analysis of evolutionary S-shaped processes: Application to historical time series and forecasting

A new multi-logistic methodology to analyze long range time series of evolutionary S-shaped processes is presented. It conceptually innovates over the traditional logistic approach. The ansatz includes computing the residuals to an optimized multi-logistic trend curve least squares fitted to the time-series data. The elements of the residuals series are checked for autocorrelations and once detected the residuals series is further analyzed to search for eventual presence of underlying periodic structures using a truncated Fourier sine series. The method foundations ensures both a universal applicability and a capacity to disclose the existence of active clocks that can be possibly traced to the driving motors of the evolutionary character of the time series, due to the responsiveness of corresponding process to the development of economic cycles. On associating these two views, it is found that the methodology has a strong potential to improve the quality of short-term forecasts. These findings have been put to test through applications of the methodology to studying the time evolution of two commodities of strong economic and social importance (corn and steel) and good results were consistently obtained for both the analytical and forecasting aspects.     

核心企业集约的多产品、多级供应链库存控制策略研究

在供应链环境及结构稳定情况下,供应链上的各节点企业,根据需求来调整相应的运作策略。基于多层供应商及供货产品为多品种且集约到一个核心企业的供应链网络,根据该供应链网络供需结构和特点分析了各节点的需求特征,得出了订货提前期为随机条件下的最佳库存费用,并利用各节点服务水平约束下的临界值及库存费用凸函数特性确定了供应链的运作策略。     

Key Success Factors for Tourism Resort Management

Abstract

NEW HORIZONS IN TOURISM: STRANGE EXPERIENCES AND STRANGER PRACTICES. By Tej Vir Singh. CABI Publishing (Nosworthy Way, Wallingford, Oxfordshire, OX10 8DE UK), ISBN 0-8519-9863-1, 2004, xv + 221-pp. (tables, photographs, bibliography), £49.95 (hardbound). Reviewed By C. Michael Hall

DESTINATION MARKETING ORGANISATIONS. By Steven Pike. Elsevier (The Boulevard, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom), ISBN 0-0804-4306-0, 2004, 231-pp. (bibliography, indices), £59.99 (hardbound). Reviewed By Chris Ryan