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51.
Sallie Keller-McNulty Charles W. Nakhleh Nozer D. Singpurwalla 《Revue internationale de statistique》2005,73(3):331-349
This is an expository paper. Here we propose a decision-theoretic framework for addressing aspects of the confidentiality of information problems in publicly released data. Our basic premise is that the problem needs to be conceptualized by looking at the actions of three agents: a data collector, a legitimate data user, and an intruder. Here we aim to prescribe the actions of the first agent who desires to provide useful information to the second agent, but must protect against possible misuse by the third. The first agent is under the constraint that the released data has to be public to all; this in some societies may not be the case.
A novel aspect of our paper is that all utilities—fundamental to decision making—are in terms of Shannon's information entropy. Thus what gets released is a distribution whose entropy maximizes the expected utility of the first agent. This means that the distribution that gets released will be different from that which generates the collected data. The discrepancy between the two distributions can be assessed via the Kullback–Leibler cross-entropy function. Our proposed strategy therefore boils down to the notion that it is the information content of the data, not the actual data, that gets masked. Current practice of "statistical disclosure limitation" masks the observed data via transformations or cell suppression. These transformations are guided by balancing what are known as "disclosure risks" and "data utility". The entropy indexed utility functions we propose are isomorphic to the above two entities. Thus our approach provides a formal link to that which is currently practiced in statistical disclosure limitation. 相似文献
A novel aspect of our paper is that all utilities—fundamental to decision making—are in terms of Shannon's information entropy. Thus what gets released is a distribution whose entropy maximizes the expected utility of the first agent. This means that the distribution that gets released will be different from that which generates the collected data. The discrepancy between the two distributions can be assessed via the Kullback–Leibler cross-entropy function. Our proposed strategy therefore boils down to the notion that it is the information content of the data, not the actual data, that gets masked. Current practice of "statistical disclosure limitation" masks the observed data via transformations or cell suppression. These transformations are guided by balancing what are known as "disclosure risks" and "data utility". The entropy indexed utility functions we propose are isomorphic to the above two entities. Thus our approach provides a formal link to that which is currently practiced in statistical disclosure limitation. 相似文献
52.
对国际多式联运的网状责任制原则与多式联运经营人的赔偿责任限制进行了理论综述,指出网状责任制的最大弊端和实践中国际货运市场供求关系决定责任归属的现状。通过尝试从企业实践中另辟蹊径,提出了货运单据和科技创新设备在划分各关系方责任方面的实际作用。 相似文献
53.
The inclusion of criteria related to the spatial patterns resulting from forest harvesting activities is an important component of forest planning. Harvesting operations are more efficient when the harvesting areas are clustered. Therewith, it is possible to reduce the displacement of machinery and costs related to construction and maintenance of the road network. In this context, the objective of this study was to evaluate different strategies for aggregating harvesting stands in a forest plantation. We applied two Goal Programming approaches aiming at aggregating harvesting stands and an Integer Linear Programming model for including road investments into strategic forest planning. 相似文献
54.
本文主要介绍了收割部分和秸秆回收部分的总体设计。解决高产超级稻的收获问题。割前脱粒(梳脱式)机型由于作业时茎秆不进入机器中,可以减少机具对物料的处理量、降低损失、减少功耗、提高工作效率,是解决超级稻收获的理想机具之一。 相似文献
55.
MACD(Moving Average Convergence and Divergance)是指数平滑异同移动平均线,根据均线的构造原理,对股票价格的收盘价进行平滑处理,求出算术平均值后再进行计算而得,是一种追踪趋势类指标。 相似文献
56.
公司经理权作为一种特殊的民商事权利在我国先行法律中并没得到很好体现。本文从考察各国有关经理权的法律规定入手,对公司经理权的内容、行使方式及其限制进行了深入细致的探讨。并对我国公司经理制度的完善提出了一些自己的建议和思考。认为对经理权的立法应从民法和商法两个层面分别作出规定,并将我国公司法上的经理职权改成经理权,并适当扩充其权利内容。 相似文献
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商业银行对科技中小企业贷款方式的研究 总被引:1,自引:0,他引:1
商业银行贷款给科技中小企业面临着高风险,而高收益的要求在我国由于分业经营和利率浮动上限的限制,不能得到满足。文章设计的资产价格浮动利率法和滚动结算法可以使银行贷款给科技中小企业,承担高风险的同时,获得高收益,从而增强商业银行给科技中小企业贷款的激励,解决科技中小企业的融资难题。 相似文献
60.
资源环境约束下西部地区矿产资源型产业发展模式研究 总被引:7,自引:0,他引:7
面对资源与环境的约束,西部地区资源型产业必须寻找一种与资源、环境相协调的产业发展模式。文章围绕西部资源型产业发展面临的主要问题,探讨如何走出困境的产业发展模式,提出以更新资源型产业定位,树立新的均衡协调的发展观为重点,构建资源型产业可持续发展战略,以及相应的政策和思路。 相似文献