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南京,一座钟灵毓秀的千年文化古城.中铁十四局股份公司的建设者在这里拚搏十年,金陵城建史上的许多大型建设项目,都留下了他们的足迹.可以说,在南京,中铁十四局股份公司具有相当高的知名度.目前,他们承建的南京城市快速内环东线-标段(二期)工程,由于建筑规模大、施工难度大、社会影响大、工期紧迫等特点受到全市的瞩目,更成为南京媒体高度关注的重点工程.……  相似文献   

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美国西雅图一家棒球俱乐部的CEO说,他已告诉员工,哪怕只是得普通病也要在家休息,"我告诉他们,如果你得了流感还来工作,这可能是你在这里工作的最后一天。  相似文献   

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The breakdown point in its different variants is one of the central notions to quantify the global robustness of a procedure. We propose a simple supplementary variant which is useful in situations where we have no obvious or only partial equivariance: Extending the Donoho and Huber (The notion of breakdown point, Wadsworth, Belmont, 1983) Finite Sample Breakdown Point?, we propose the Expected Finite Sample Breakdown Point to produce less configuration-dependent values while still preserving the finite sample aspect of the former definition. We apply this notion for joint estimation of scale and shape (with only scale-equivariance available), exemplified for generalized Pareto, generalized extreme value, Weibull, and Gamma distributions. In these settings, we are interested in highly-robust, easy-to-compute initial estimators; to this end we study Pickands-type and Location-Dispersion-type estimators and compute their respective breakdown points.  相似文献   

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This article reviews R , an open-source S -like high-level matrix programming language that can be used for econometric simulations and data analysis. Copyright © 1999 John Wiley & Sons, Ltd.  相似文献   

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另一种观察     
总部设在美国北卡罗来纳州的“创造性领导人才中心”对近500名企业总裁进行的调查结果显示:让错误人选进入领导班子的代价是巨大的——选择和培训一名低级主管耗资约5000美元,而选择和培训一名高级主管则可能耗资25万美元。  相似文献   

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In a low-dimensional linear regression setup, considering linear transformations/combinations of predictors does not alter predictions. However, when the forecasting technology either uses shrinkage or is nonlinear, it does. This is precisely the fabric of the machine learning (ML) macroeconomic forecasting environment. Pre-processing of the data translates to an alteration of the regularization – explicit or implicit – embedded in ML algorithms. We review old transformations and propose new ones, then empirically evaluate their merits in a substantial pseudo-out-sample exercise. It is found that traditional factors should almost always be included as predictors and moving average rotations of the data can provide important gains for various forecasting targets. Also, we note that while predicting directly the average growth rate is equivalent to averaging separate horizon forecasts when using OLS-based techniques, the latter can substantially improve on the former when regularization and/or nonparametric nonlinearities are involved.  相似文献   

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This note begins with a brief summary of the economic and regulatory history surrounding the Universal Banking debate. Following this introduction, it focuses on the Brazilian regulatory and supervision experience. The Central Bank of Brazil has persistently enhanced prudential regulation and supervision practices in order to cope with the complexity of large financial institutions and financial holding companies. Some features of the Brazilian regulatory framework have contributed to the Brazilian economic and financial performance in recent years, such as: consolidated financial statements, including all financial and non financial subsidiaries; internal structures for risk management; responsibilities for controlling shareholders; unrestricted access to all information by supervisors; and, one of the most important issues, the requirement to foreign firms to constitute stand-alone subsidiaries. Finally, there is a short overview of the G20 financial sector reform agenda (including Basel III accord), specially, regarding the issue of Systemically Important Financial Institutions – SIFIs.  相似文献   

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The German system of training is often seen as an example for Britain. Len Shackleton and David Lange, of Westminster University, argue that, in fact, it handicaps the German economy.  相似文献   

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“六点多起床,轻轻亲吻一下仍在熟睡中的妻女,迎着露水踏上高尔夫球场。挥杆、击球,与清晨草地上飞舞着的不知名的小昆虫一起开始充满生机的一天。”颐和集目董事副总裁赵永爽对豪宅的写意定义,让起于千万元、直飚上亿元的颐和高尔夫庄园顿时变得亲切起来。  相似文献   

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Differentiation is now 'official' in the EU and the idea of a several-speed Europe is acceptable. The major member-States, Germany apart, no longer favour a federal United States of Europe. Additions to the 'acquis communautaire' will be small in number and EU regulation will increase more lowly. Britain should work within the EU to keep it 'open and flexible'.  相似文献   

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Most UK charities, both national and local, place boxes in outlets such as shops, bars, cafés, filling stations, banks and building societies. Usually the box is placed by a representative of the charity visiting the potential site and inviting whoever is on duty to accept the box. This research sampled 2,308 UK retailers in order to determine their perceptions of the boxes held on their premises, the number of boxes held, their location and security. From the responses to the survey the authors discuss the distribution of boxes over different retail types and analyse retailers perceptions.  相似文献   

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