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半参数回归模型的稳健估计 被引量:4
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作者 胡宏昌 《湖北师范学院学报(自然科学版)》 2002年第3期43-45,共3页
考虑半参数回归模型 yi=XTi﹀+g(ti) -εi  i=1 ,2 ,… n,先由稳健估计的原则得出 ﹀∧ 和 g∧ (t) 。
关键词 半参数回归模型 稳健估计 影响函数 方差-协方差矩阵 参数估计 估计原则
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如何进行公路建设企业的会计估计
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作者 姚萍 《河北财会》 2001年第10期56-57,共2页
关键词 公路建设企业 会计估计 会计估计原则 会计估计项目
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GPS卫星钟差二次多项式预报模型的总体最小二乘算法 被引量:2
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作者 张清鸾 魏朋 危威 《价值工程》 2014年第28期219-220,共2页
GPS精密单点定位技术是今后GPS测量技术的发展趋势,其中,卫星轨道预报与钟差预报是该技术的关键。如今,IGS组织已能够提供短时高精度的卫星轨道预报,但在钟差预报方面尚无法达到实时定位的要求,所以建立足够精度的卫星钟差预报模型尤为... GPS精密单点定位技术是今后GPS测量技术的发展趋势,其中,卫星轨道预报与钟差预报是该技术的关键。如今,IGS组织已能够提供短时高精度的卫星轨道预报,但在钟差预报方面尚无法达到实时定位的要求,所以建立足够精度的卫星钟差预报模型尤为重要。文章根据常用的二次多项式短期预报模型,提出新的参数估计方法——总体最小二乘估计,并得出该方法能进一步提高二次多项式模型预报精度的结论。 展开更多
关键词 卫星钟差 二次多项式模型 总体最小二乘估计原则
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消除舒拉振荡误差的理论与实践 被引量:4
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作者 汪湛清 房建成 +1 位作者 汪顺亭 王志强 《中国惯性技术学报》 EI CSCD 北大核心 2012年第4期395-399,共5页
惯性导航系统的舒拉振荡误差,不仅影响速度、姿态、位置等导航参数精度,而且严重影响系统重调或位置更新效果,是长航时惯性导航系统必须解决的问题。采用经典控制理论的阻尼网络衰减舒拉振荡,是国内外经典专著介绍和实践的设计方法。这... 惯性导航系统的舒拉振荡误差,不仅影响速度、姿态、位置等导航参数精度,而且严重影响系统重调或位置更新效果,是长航时惯性导航系统必须解决的问题。采用经典控制理论的阻尼网络衰减舒拉振荡,是国内外经典专著介绍和实践的设计方法。这种以破坏纯惯性解算无干扰条件为代价的传统方法,生成了"阻尼"和"无阻尼"这对互为悖论的矛盾,带来许多经典控制理论无法解决的问题。试图利用现代控制理论,在保持纯惯性解算模式不被干扰破坏的条件下,消除舒拉振荡误差。仿真试验给出满意的理想结果,证明利用现代控制理论解决阻尼问题的优越性能。 展开更多
关键词 惯性导航系统 水平阻尼 舒拉振荡 模型参数辨识 最优控制 估计控制分离原则 现代控制理论
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浅议成本分摊基础
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作者 费峰 《卫生经济研究》 2003年第6期16-16,共1页
关键词 成本分摊 医院 成本核算 分摊基础 收益原则 估计原则 行为导向原则
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非线性不适定问题一种双循环的牛顿型迭代格式 被引量:3
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作者 张瑰 黄思训 《数学年刊(A辑)》 CSCD 北大核心 2003年第3期321-330,共10页
本文研究非线性算子方程F(x)=y的解,结合最速下降法,Newton-Landweber迭代格式及正则化思想,在F满足适当的条件下,构造出新的双循环迭代格式。本文对格式的收敛性进行了严格论证,并估计出迭代格式的收敛精度。
关键词 非线性算子方程 非线性不适定问题 牛顿型迭代格式 迭代终止原则 收敛阶估计
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Evaluation of Several Phases in the Development of Management Accounting
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作者 Chaomi Zhang Qinru Qian 《Journal of Modern Accounting and Auditing》 2005年第7期1-10,共10页
This paper discusses three issues, raised by Relevance Lost (Johnson & Kaplan, 1987), about historical evaluation of the development of management accounting. The first issue is when management accounting system wa... This paper discusses three issues, raised by Relevance Lost (Johnson & Kaplan, 1987), about historical evaluation of the development of management accounting. The first issue is when management accounting system was formed; the second is how to evaluate its development in subsequent decades; the third is how to evaluate the development of practice and research of management accounting in almost twenty years after Relevance Lost was published. The role of Relevance Lost in practice and theoretical research of management accounting is widely recognized, and the disagreement with it in this paper is in the specific area of the development history of management accounting. The authors of this paper believe that the development, through having its ups and downs over time, is generally speaking a continuous process, not separated by disconnected phases, leaping from one to another. Along with the progress in practice and research, researchers and practitioners are deepening their understanding about the theoretical foundation and practical development of management accounting. The history of development of management accounting is consistent with the process people gradually understand it. 展开更多
关键词 history of development of management accounting theory PRACTICE methods behavior
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Boundeness of a Class of Maximal Operators on H^p Spaces on Compact Lie Groups
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作者 江寅生 《Chinese Quarterly Journal of Mathematics》 CSCD 1993年第4期1-9,共9页
In this paper we discuss the weak type(IP,I)boundedness of a class of maximal operators T and themaximal strong,mean boundedness of a family of the operators {T on the atomic IP spaces on compaet Lie groups.Also,we ob... In this paper we discuss the weak type(IP,I)boundedness of a class of maximal operators T and themaximal strong,mean boundedness of a family of the operators {T on the atomic IP spaces on compaet Lie groups.Also,we obtain the correspoding convergent rosults. 展开更多
关键词 compact Lie group IP spaces boundedness of a class of maximal operators
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Financial Statement Valuations in Italian Accounting Thought Between the 19th and the 20th Century: From "Exchange Value" to "Historical Cost"
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作者 Enrico Gonnella 《Journal of Modern Accounting and Auditing》 2012年第9期1255-1271,共17页
The main subject of this paper is the theory of financial statement valuations observed in its historical development. More notably, regarding the subject, the research is concerned with some theoretical concepts deve... The main subject of this paper is the theory of financial statement valuations observed in its historical development. More notably, regarding the subject, the research is concerned with some theoretical concepts developed by the Italian doctrine in a very specific age, namely, between the 19th and the 20th century, which in fact, devoid of any accounting regulation. This paper analyzes in particular the shift from the exchange value rule to the historical cost method and tries to explain the reasons of such a development. In the second half of the 19th century, some of the best Italian scholars, who were faced with the need to properly develop the problem of accounting valuations, thought that it was appropriate to rely on concepts that belonged to similar sciences, such as economics and real estate appraisal, by blindly borrowing the theory of value from the former and the theory of valuations from the latter. During that age, everything hinged around the concept of exchange value. At the dawn of the 20th century, the Italian accounting doctrine began to wonder about a subject that was crucial to the financial statement theory: the informative purposes underlying the financial statements. At the same time, the first principle took shape, which might be called as the "finalistic principle of value". It is still the basis of the theory of financial accounting measurements, for which different evaluative criteria must be applied to different informative purposes. Thus, an alternative criterion to that of the exchange value makes its appearance on the scene of the accounting valuations, notably the historical cost. The introduction of the historical cost criteria and above all the relinquishment of the combination of the "economic cost" in favor of that of the "manufacturing cost" allow the Italian accounting to get rid of the theories of economics and real estate appraisal, thus, becoming independent regarding the financial statement valuations. 展开更多
关键词 accounting history financial statement valuations asset valuation exchange value historical cost ITALY
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Multi-parameter Tikhonov Regularization—An Augmented Approach
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作者 Kazufumi ITO Bangti JIN Tomoya TAKEUCHI 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2014年第3期383-398,共16页
We study multi-parameter regularization(multiple penalties) for solving linear inverse problems to promote simultaneously distinct features of the sought-for objects. We revisit a balancing principle for choosing regu... We study multi-parameter regularization(multiple penalties) for solving linear inverse problems to promote simultaneously distinct features of the sought-for objects. We revisit a balancing principle for choosing regularization parameters from the viewpoint of augmented Tikhonov regularization, and derive a new parameter choice strategy called the balanced discrepancy principle. A priori and a posteriori error estimates are provided to theoretically justify the principles, and numerical algorithms for efficiently implementing the principles are also provided. Numerical results on deblurring are presented to illustrate the feasibility of the balanced discrepancy principle. 展开更多
关键词 Multi-parameter regularization Augmented Tikhonov regularization Balanced discrepancy principle
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