战场环境中的电波传播模型优化选择方法

针对战场级的复杂电磁环境仿真过程中涉及到全频段覆盖、环境影响、仿真速度要求高等问题,提出了一种综合考虑用频装备、环境信息和模型自身特点的电波传播模型选择方法。该方法首先通过频段对用频装备及电波传播模型进行划分,再结合环境信息中降雨量、海拔、植被覆盖率、气候类型、导电特性等参数进行综合分析,最终得到传播模型的优化选择方案。在典型作战场景仿真应用中,该方法为传播模型的合理选择提供了思路,保证了仿真的精度,同时也为电磁环境仿真中传播模型本地化提供了依据。     

Global 2000: Radar for the ship of state

The way the US Global 2000 report has (and, especially, has not) been reacted to and publicly debated illustrates many fundamental problems in developing workable and efficient radar for the ship of state. The text and footnotes draw attention to eg conflicting assumptions in different agencies, or the superficial but unchallenged criticisms of analyses by senior government officials. Many important principles are not even addressed.     

借鉴美国的监管方式强化我国的金融监管

全球金融市场面临越来越大的风险,监管日益成为重要课题。怎样把金融资源放到最有效的地方去,同时使风险得到最好的控制,这是我国金融体制改革亟待解决的问题。因此,借鉴美国的监管方式,研究我国金融现状,提出完善金融监管的措施,是当前金融体制改革的重点。     

证券市场成交量对收益率波动性影响的实证分析

本文根据上海证券市场上证综合指数2005年1月1日到2006年1月1日的复合收益率和日成交量。用GARCC模型描述日成交量对复合收益率的波动性影响。在GARCH模型中加入当期交易量、滞后一期的交易量，结果表明当期交易量变化率能明显削弱收益率条件方差的波动性，而滞后一期的成交量只通过对当期的成交量间接的影响复合收益率。     

Market structure and competitive conditions in the Arab GCC banking system

This paper investigates the market structure of Arab GCC banking industry during the years of 1993–2002 using the most frequently applied measures of concentration k-bank concentration ratio (CRk) and Herfindahl–Hirschman Index (HHI) and evaluates the monopoly power of banks over the ten years period using the ‘H-statistic’ by Panzar and Rosse. The results show that Kuwait, Saudi Arabia and UAE have moderately concentrated markets and are moving to less concentrated positions. The measures of concentration also show that Qatar, Bahrain and Oman are highly concentrated markets. The Panzar–Rosse H-statistics suggest that banks in Kuwait, Saudi Arabia and the UAE operate under perfect competition; banks in Bahrain and Qatar operate under conditions of monopolistic competition; and we are unable to reject monopolistic competition for the banking market in Oman.     

Forces Leading to the Adoption of Accrual Accounting by the Canadian Federal Government: An Institutional Perspective*/ LES FORCES AYANT MENÉ L'ADMINISTRATION FÉDÉRALE CANADIENNE À ADOPTER LA COMPTABILITÉ D'EXERCICE: UNE PERSPECTIVE INSTITUTIONNELLE

In 1995, the federal government of Canada announced that it would adopt full accrual accounting. The change was fully implemented at the department level in 2001 and for government‐wide financial reporting in 2003. Using the perspective of institutional theory, we examine several factors that had the potential to influence the federal government's decision to adopt full accrual accounting, including two royal commissions, the Office of the Auditor General of Canada, the Canadian Institute of Chartered Accountants, credit markets, and the practices of other national governments. We find that the decision to change to accrual accounting can be largely attributed to coercive and normative influences of the Office of the Auditor General of Canada (supported by the normative influence of the Canadian Institute of Chartered Accountants' Public Sector Accounting Board) and mimetic isomorphism with other members of the federal government's organizational field.     

An integrated multi-model credit rating system for private firms

This paper presents a integrated credit risk modelling approach for private firms which fulfil 2001 Basel Accord requirements in the case of the adoption of the foundation approach. Our model comprises: (a) a bottom-up technique to initially assess the through-the-cycle one-year Probability of Default (PD) and (b) a top-down approach to refine and calibrate this historical PD in a forward-looking credit risk assessment based on next year’s economic outlook. We present findings from applying this model to a large sample of client firms of the Bank of Rome.     

The effect of differential accounting conservatism on the “over-valuation” of high-tech firms relative to low-tech firms

This paper examines systematic differences in the level of accounting conservatism between high-tech and low-tech firms. Relying on the recent development in theoretical models and empirical measures of conservatism, we investigate conservative accounting practices and earnings management behavior in high-tech and low-tech firms. The results based on comparisons of cumulative nonoperating accruals, regression coefficients from the income timeliness models in Basu (1997), the distribution of earnings, and discretionary accruals between the two groups are consistent with a higher level of accounting conservatism in high-tech firms vis-à-vis low-tech firms. Additional analyses show that the effect of conservatism cannot be used as a defense for the over-valuation of high-tech firms.     

资本约束、风险管理与商业银行成长

基于资本必须覆盖风险命题的要求，银行的风险管理能力决定了银行的资本规模和资本的配置，银行资本管理实质上等价于风险管理，资本约束实质上就是风险约束。资本软约束是制约中国商业银行成长的主要障碍之一，但仅仅致力于资本充足率问题的解决并不能保证我国商业银行的可持续成长，风险约束是制约我国商业银行成长的瓶颈。只有从制度、技术和经营战略等方面入手，不断提高风险管理能力，建立以资本约束为核心的业务增长模式和资源配置方式，尽快实现成长模式由资金约束到资本约束的转变，中国商业银行才能在效益、质量和规模协调发展的基础上实现持续成长。