Estimation of Internal Rate of Return Under Nonsteady Conditions

This study presents a method to estimate the IRR (internal rate of return) from published financial statement data under nonsteady conditions. The IRR is allowed to systematically change over time. The method provides an estimate for the current profitability of periodic total expenditure, its rate of change, and the firm-level profitability. Four competing steady and nonsteady statistical models are evaluated by simulation showing that a restricted nonsteady model may give the most reliable estimates. The model is applied to Finnish firms to illustrate how to use the model in practice. Three samples of publicly traded and nontraded firms are considered.     

分布式压缩的图像关联重建方法

针对通信网络有限带宽传输大数据量图像信息的瓶颈问题,提出了基于系数整合法的分布式 压缩传输的图像重建新方法,首先通过对原图像进行分块小波变换获得子图像小波系数向量 ,从而大大降低压缩编码系统的数据传输量,再对压缩编解码的子图像小波系数进行关联处 理,形成原图像的整体小波变换系数向量,最后采用小波反变换实现原图像的重构。仿真分 析结果表明,本方法计算量小,数据存储低,并具有高质量的图像重建效果。     

PCTran/AP1000核电站仿真软件的改进

本文介绍了PCTran/AP1000核电站仿真软件由单机版向分布式培训系统的改进,通过WinSock控件实现了基于TCP/IP协议的网络通讯功能。该系统可以满足核类专业实验教学的要求,对于提高核电站操作人员的认知水平起到积极的作用。     

智能电网技术现状与发展趋势

文章介绍了智能电网的概念和功能特点,总结了智能电网技术的国内外研究现状以及发展智能电网对我国的重要意义,阐述了对期建我国智能电网技术的几点思考,并着重分析了构建我国智能电网需要重点关注的几个发展方向和必须解决的几个关键技术问题。     

How sensitive is U.S. agricultural trade to the bilateral exchange rate? Evidence from bulk,intermediate, and consumer‐oriented products

This article examines the dynamic effects of changes in bilateral exchange rates on changes in bilateral trade of bulk, intermediate, and consumer‐oriented agricultural products between the United States and its 10 major trading partners. We find that, for consumer‐oriented products, U.S. exports are highly sensitive to bilateral exchange rates in both the short and long run, while U.S. imports are mostly responsive only in the short run. For bulk products, on the other hand, U.S. exports and imports are relatively insensitive to exchange rate changes in both the short and long run. For intermediate products, exports and imports are responsive to exchange rate changes in the short run, but not in the long run. It is also found that income of the United States and its trading partners has a significant effect on U.S. exports and imports of the three types of agricultural products in both the short and long run.     

基于信任管理模型的对比分析

信任管理是一种以密钥为中心的授权机制,针对目前大规模的、开放的分布式系统的授权问题,与现在正广泛流行的p2p应用与传统的安全授权机制相比,它具有灵活性、可扩展性以及可靠性.文章介绍了信任管理的基本概念及发展历史和发展趋势,提出了未来发展中所存在的一些问题.     

Toward a theory of honesty and trust among communicating autonomous agents

This article outlines, through a number of examples, a method that can be used by autonomous agents to decide among potential messages to send to other agents, without having to assume that a message must be truthful and that it must be believed by the hearer. The main idea is that communicative behavior of autonomous agents is guided by the principle of economic rationality, whereby agents transmit messages to increase the effectiveness of interaction measured by their expected utilities. We are using a recursive, decision-theoretic formalism that allows agents to model each other and to infer the impact of a message on its recipient. The recursion can be continued into deeper levels, and agents can model the recipient modeling the sender in an effort to assess the truthfulness of the received message. We show how our method often allows the agents to decide to communicate in spite of the possibility that the messages will not be believed. In certain situations, on the other hand, our method shows that the possibility of the hearer not believing what it hears makes communication useless. Our method thus provides the rudiments of a theory of how honesty and trust could emerge through rational, selfish behavior.This research was supported, in part, by the Department of Energy under contract DG-FG-86NE37969, and by the National Science Foundation under grant IRI-9015423.     

基于ARCGIS的交易台账管理系统设计

针对国有建设用地实施信息化管理平台建设业务的需求,提出了开发国有建设用地使用权交易台账管理系统的课题,在分析了管理平台信息化建设现状的基础上,设计了基于ARCGIS的交易台账管理系统总体架构、系统功能结构、台账交易数据库设计结构,并运用了中间件技术、Flex技术、ArcServer、数据仓库与智能技术,最终实现了具备台账信息分类、检索、汇总、统计以及图形与文字信息叠加打印、保存等功能。该系统可为国土资源部门对土地资源管理、决策辅助分析提供一个技术平台。     

Financial reforms and credit growth in Nigeria: empirical insights from ARDL and ECM techniques

In the last 37 years, Nigeria has undergone several stages of financial reforms with different impacts on the economy. This paper analyses the impact of these financial reforms on credit growth in Nigeria using annual data from 1980 to 2016. The research work hinges on the theoretical underpinning of McKinnon-Shaw hypothesis on the relevance of financial reforms in a lagging economy. Analysing the data with autoregressive distributed lag error correction representation and bounds testing techniques, we find evidence supporting this hypothesis, and specifically that at higher real interest rates there is increased financial intermediation evidenced by credit growth. Other findings are that in the long-run, financial system deposits, inflation rate and per capita GDP are strong asymmetrical predictors of credit growth and real interest rates (the financial reform indicator), while the short-run relationships are indicator-specific. We further show that a long-run cointegration relationship exists between domestic credit and other covariates and likewise between the real interest rate and its regressors.     

A blockchain-enabled platform for VAT settlement

Governments may unintentionally impose heavy administrative burdens on companies as they want to ensure the flow of tax revenue. Drawing on an engagement involving the Danish Business Authority and following a design science research (DSR) approach, this paper develops a prototype of a platform for value-added tax (VAT) settlement that is enabled by distributed ledger technology (DLT) and design principles for designing DLT platforms. The proposed prototype and design principles demonstrate how accounting information systems, DLT, and public governance may be interrelated to enhance social welfare. Regarding its practical implications, this paper provides a use case for governments seeking to reduce administrative burdens on small and medium-sized enterprises (SMEs) while still ensuring the flow of tax revenue.