NUMERICAL SIMULATION OF STRESS-INDUCED SECONDARY FLOWS WITH HYBRID FINITE ANALYTIC METHOD

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｔｕｒｂｕｌｅｎｔｓｔｒｕｃｔｕｒｅｓｉｎｎｏｎ ｃｉｒｃｕｌａｒｄｕｃｔｓａｎｄｏｐｅｎｃｈａｎｎｅｌｓａｒｅｃｈａｒａｃｔｅｒｉｚｅｄｂｙｌｏｎｇｉｔｕｄｉ ｎａｌｖｏｒｔｉｃｅｓ .Ｔｈｅｓｅｖｏｒｔｉｃｅｓａｒｅｔｈ     

节理岩体的代表单元集合体模型及弹性参数预测

本文明确提出了节理岩体“代表单元集合体”的概念和模型，通过对节理岩体的“代表单元集合体”进行数值模拟，研究了节理岩体的“代表单元集合体”的变形特性，建立了节理岩体的弹性模型，提出了预测节理岩体宏观等效弹性参数的计算机模拟方法，并将其应用于岩体工程稳定性分析中。     

大坝水平位移监控指标拟定的混合法

用混合法拟定了大坝水平位移的监控指标，即通过结构分析和建立数值 模型，计算大坝水平位移的水压分量和给定概率水平下的温度分量极值，进而拟定水平位移 监控指标，并给出了实例。     

码头建筑物对水位影响的模型试验及计算方法

河岸码头建筑物势必导致其上游水位壅高及对码头附近水流流态产生影响。以汉江沙洋河段为对象 ,通过定床概化物理模型试验研究了码头建筑物对河道水位与流速场的影响。并基于能量平衡原理 ,采用河道恒定非均匀流水面曲线基本方程 ,结合物理模型试验资料 ,计算了码头建筑物附近的水位变化值 ,并提出了码头建筑物产生的水位壅高值的计算方法。     

电子商务条件下我国物流模式的选择——综合物流代理模式

本文针对电子商务条件下现代物流的新特点和我国物流现状,提出在新的条件下选择适合我国国情的物流模式,即综合物流代理模式。它是由一家在物流管理经验、人才和技术上均有一定优势的企业通过建立一个综合物流代理的管理体系,对电子商务交易中供求双方的所有物流活动进行全权代理的业务活动模式。     

Differential reporting in Germany - A historical analysis

Based on a contingent perspective of accounting change, this paper reviews the historical development of differential reporting in Germany, by drawing on primary and secondary sources. The main objective of the paper is to shed light on the driving forces and main influential parameters that have shaped the existing differential reporting framework. This historical approach supplies interesting insights for the current discussion on differential reporting in Germany produced by the EU Regulation on the application of International Accounting Standards.     

The effect of exchange rate changes on trade balances in the short and long run

Using generalized impulse response functions, this study tests for the trade J‐curve for three transitional central European countries – the Czech Republic, Hungary, and Poland – in their bilateral trade with respect to Germany. Our findings suggest that for each country there are some characteristics associated with a J‐curve effect: after a (real or nominal) depreciation the export‐to‐import ratio briefly drops to below its initial value within a few months and then rises to a long run equilibrium value higher than the initial one.     

Backtesting Value-at-Risk: A Duration-Based Approach

Financial risk model evaluation or backtesting is a key partof the internal model's approach to market risk management aslaid out by the Basle Committee on Banking Supervision. However,existing backtesting methods have relatively low power in realisticsmall sample settings. Our contribution is the exploration ofnew tools for backtesting based on the duration of days betweenthe violations of the Value-at-Risk. Our Monte Carlo resultsshow that in realistic situations, the new duration-based testshave considerably better power properties than the previouslysuggested tests.     

Do Germans Save to Leave an Estate? An Examination of the Bequest Motive

I investigate whether a bequest motive for savings influences the post-retirement wealth trajectories of German households. Two measures of the bequest motive are studied: the existence of children as the main group of potential heirs and the respondents' declared intention to bequeath. While having children has no significant impact on households' wealth trajectories, stated bequest intentions are associated with considerable heterogeneity in wealth holdings. The main conclusion from this study is that both the pure life-cycle model and the life-cycle model with bequest motives provide a valid basis for a theory of household wealth accumulation once the heterogeneity of preferences is acknowledged.
JEL classification : D 91; J 14     

再论“用离心机作静力结构模型试验”

 本文通过最近所作的两个离心模型试验,进一步探讨了用离心机作静力结构模型试验的有关问题,试验结果进一步证明用离心机作静力结构模型试验,无论在理论上和试验技术上都是可行的,最后将有关问题作了进一步的讨论。