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西部干旱区生态环境调控对策定量研究方法 被引量:16
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作者 左其亭 陈嘻 杨辽 《干旱区地理》 CSCD 北大核心 2001年第2期146-151,共6页
对于生态环境十分脆弱的西部干旱地区从便于生态环境调控与管理的角度 ,急需进行量化研究 ,内容包括 :量化指标体系与指标量化方法、调控优化模型与求解、调控方案制定与实施等。针对干旱区生态环境的特点 。
关键词 生态环境 调控 管理 定理研究方法 干旱区 中国
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Exploring Enterprise Performance Indicators Network: A Case Study of China Telecommunication Industry 被引量:1
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作者 Shi Wenhua Du Yu Zhang Xiaohang 《China Communications》 SCIE CSCD 2012年第12期153-163,共11页
Perforrmnce indicators play some important roles in enterprise operation. Both researchers and managers have recently pointed out that the identification of correlation between different performmance indicators may le... Perforrmnce indicators play some important roles in enterprise operation. Both researchers and managers have recently pointed out that the identification of correlation between different performmance indicators may lead to a better understanding of business. However, it is becoming more and more difficult to measure and analyze these indicators since the fast growing number of performance indicators and the complex relationships between them The existing categories failed to reflect these changes in an adequate way, and the quantitative analysis methods for identifying the characters of those pefformance indicators are still worthy of investigation. The main objective of this paper is to propose a practical methodology for managing and analyzing performance indicators in enterprises, which focuses on building up a performance indicator system and discovering the characters of those performance indicators by applying complex network methods. The empirical results of a telecommunieation enterprise show that the proposed method can be effective in understanding the correlations between performance indicators. 展开更多
关键词 performance indicator complex networks telecommunication industry
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DISCOVERY OF LATENT STRUCTURES: EXPERIENCE WITH THE COIL CHALLENGE 2000 DATA SET
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作者 Nevin L.ZHANG 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2008年第2期172-183,共12页
The authors present a case study to demonstrate the possibility of discovering complex and interesting latent structures using hierarchical latent class (HLC) models. A similar effort was made earlier by Zhang (200... The authors present a case study to demonstrate the possibility of discovering complex and interesting latent structures using hierarchical latent class (HLC) models. A similar effort was made earlier by Zhang (2002), but that study involved only small applications with 4 or 5 observed variables and no more than 2 latent variables due to the lack of efficient learning algorithms. Significant progress has been made since then on algorithmic research, and it is now possible to learn HLC models with dozens of observed variables. This allows us to demonstrate the benefits of HLC models more convincingly than before. The authors have successfully analyzed the CoIL Challenge 2000 data set using HLC models. The model obtained consists of 22 latent variables, and its structure is intuitively appealing. It is exciting to know that such a large and meaningful latent structure can be automatically inferred from data. 展开更多
关键词 Bayesian networks case study latent structure discovery learning.
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