决策可靠性分析及在SAR图像目标识别中的应用

决策融合是提高合成孔径雷达（Synthetic Aperture Radar,SAR）目标识别性能的重要手段,然而,可靠性较弱的决策往往会导致最终决策融合的效果变差。将可靠性分析引入基于决策融合的SAR目标识别方法中,分别计算各个决策的可靠性系数并选取可靠性的决策参与最终的决策融合。为了验证方法的有效性,分别将提出的可靠性分析应用于多特征决策融合以及多分类器决策融合并基于MSTAR（Moving and Stationary Target Acquisition and Recognition）数据集进行了目标识别实验。在基于主成分分析、线性鉴别分析和非负矩阵分解三种特征进行多特征决策融合的条件下,所提方法和直接进行决策融合的方法的识别率分别为97.47%和96.50%。在基于K近邻、支持向量机和稀疏表示分类器的多分类器决策融合中,所提方法和直接进行决策融合的方法的识别率分别为97.10%和96.28%。实验结果充分证明了所提方法的有效性。     

利用频移动态特征的辐射源目标盲分选

利用辐射源目标的频移动态特征进行盲分选时,针对已有的分选方法不能很好解决非合作接收数据非周期、间断、交叠的问题,提出了一种改进的逻辑回归分选算法,将信号分选转化为轨迹分类的问题来处理。首先,借鉴多目标航迹起始模型中的M/N逻辑法的框架,设计新的数据关联门限,以建立目标起始曲线;其次,采用最小二乘拟合方法替代卡尔曼滤波,设计新的外推规则,建立载频变化预测曲线;分析新的接收数据与预测曲线的关联性,不断迭代回归或形成新的分支,最后获得目标分选结果。仿真与实测试验表明,利用逻辑回归分选算法,对不同运动目标搭载的同频辐射源可进行自动分选,4个仿真目标与2个真实目标的分选正确率达到100%。同时,该方法拓展了辐射源目标盲分选中的动态频移特征应用,为辐射源个体识别提供了新的支持。     

An experimental examination of target based conservation auctions

Conservation auctions are increasingly employed to increase the provision of Ecological Goods and Services (EG&S) for achieving environmental goals. Most applications of conservation auctions concern the efficient allocation of a fixed conservation budget. However an important and under-explored application of conservation auctions is in meeting environmental targets, either as part of regulatory compliance by industry or by governments in meeting specified policy objectives. This paper examines the ability of a conservation auction to meet an environmental target. We use experimental economics methods benchmarked to a wetlands restoration case study to examine bidder behavior and efficiency in both budget constrained and target constrained auctions when landowners with increasing marginal costs can offer increasing sized bundles of wetland acres. The target constrained auction is characterized by an all or nothing rule, where there is no payout if the target is not met. We find that rent seeking and average cost in the target constrained auction is less than in a budget constrained auction, but that efficiency eroded in repeated rounds suggesting learning effects as participants realize there is no budget cap. Even with learning effects the target based auction out-performs the budget based auction. Adding a reserve price to the target based auction significantly reduced rent seeking but also increased the probability that the target was not met. The results have important implications for auction design in real world settings.     

银行业:收益、股价及投资价值的比较分析

近年来,我国股票市场出现了一个奇异现象,即银行板块业绩优异,但其股价却严重偏离其价值。研究表明,出现这一奇特现象,不是因为该行业的股票盘子大,也不是因为政府融资平台和房地产泡沫等问题的存在导致该行业风险大,而是因为银行股波动性小,同时,也是因为相对来说我国上市公司中银行业经营管理规范、稳健,没有太多可炒作的题材,因此不受市场的投机性资金追捧。     

译前编辑与译后编辑分别使用机器翻译的对比——以英国诺里奇市城堡博物馆的荷兰画作简介的翻译为例

以英国诺里奇市城堡博物馆网站的荷兰画作简介为例,使用当下网民最常用的网络在线翻译工具之一＂Google翻译＂来对博物馆的精品画作馆藏介绍进行翻译。主要通过译前编辑使用＂Google翻译＂与译后编辑使用＂Google翻译＂,对两种不同的翻译方式所产生的译文效果、翻译过程中所产生的问题,以及完成翻译所需要耗费的时长进行对比与分析,寻找尽可能高效及优质的方法翻译源语文本;同时,发现并提出在线翻译工具需要改进的方面。     

从接受美学理论看目的语文本与源语文本的关系

接受美学理论认为,文本只有在读者积极参与下才能成为文学作品.翻译过程中,源语文本在译者积极动态的介入下,将未定性和开放性的文本形成并不完全对等的目的语文本,两者之间同中有异,互补互足.     

Target costing as a strategic cost management tool for success of balanced scorecard system

The precondition of gaining and sustaining competitive advantage for companies that operate today＇s competitive markets is the effective cost management. Since price is determined by the market, the ways of increasing profits are productivity and cost reduction. Balanced scorecard system is accepted by academicians and practitioners as an effective strategic management tool for applying the strategy successfully. In the financial perspective of the balanced scorecard system, cost reduction is a strategic objective. It is necessary that company＇s cost reduction strategy should not only be a reaction to the market, but also a continual strategy. The approach which aims to the reduction of costs that reveal along product life cycle and preset this aim at the design stage is target costing （TC）. TC can be used as an effective tool in BSC＇s financial perspective for the objective of cost reduction. In this study, the authors aim to display how to integrate the TC to BSC.     

Why persistent high inflation impedes growth? An empirical assessment of threshold level of inflation for India

In the policy debate on growth–inflation trade-off and the role of monetary policy in managing the trade-off in the short-run, theoretical and empirical research suggests the presence of a country specific threshold level of inflation. Empirical findings of this paper suggest that for India the threshold level of inflation could be around 6%. The inflation target for monetary policy may have to be somewhat lower than the growth maximizing threshold, since any positive inflation could be a risk to inclusive and sustainable growth objective.     

政府管控一般目标、总量结构和管控基本范畴

政府宏观经济管控目标具有多重性,包括保持社会总供给与总需求的平衡,促进经济再生产各环节及各产业、地区间的协调,不断提高人民生活水平调节社会分配,保护生态环境和自然资源,实现经济长期发展的良性循环和社会进步等,还包括经济目标"效率"和社会目标"均等"。宏观经济管理、调控和干预是三个既有联系又有区别的概念,而管控应当说包涵了三方面内容。管控的基本内容和手段实际也是市场机制调节功能的有机组成,客观上要求宏观经济调节机制必须通过市场机制起作用。     

EXCHANGE RATE TARGET ZONES: A SURVEY OF THE LITERATURE

This work selectively reviews the literature on exchange rate target zones and their theoretical and empirical methodologies and examines whether they can be used to clarify to what extent this type of exchange rate regime could contribute to greater exchange rate stability. We discuss the main contributions of the first and second generations of exchange rate target zone models. In an attempt to reconcile the poor empirical performance of the Krugman model with the reality of exchange rate target zone regimes, this line of research integrates target zones with alternative underlying economic models, such as imperfect credibility, intra‐marginal interventions and sticky price models. It was thus possible to understand the correlations observed between the exchange rate, its fundamentals determinants and the interest rate differential, and to explain the fact that the statistical distribution of the exchange rate is hump shaped rather than U shaped. This implies that the initial emphasis of target zone models on nonlinearities, ‘honeymoon effect’, ‘smooth pasting’ and marginal interventions has vanished. Exchange rate target zones are better described as similar to managed floating regimes with intra‐marginal interventions, with some marginal interventions when the exchange rate reaches the edges of the floating band.