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An Entropy-based Index for Fine-scale Mapping of Disease Genes 被引量:2
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作者 李玉梅 向阳 +1 位作者 邓红文 孙振球 《Journal of Genetics and Genomics》 SCIE CAS CSCD 北大核心 2007年第7期661-668,共8页
By comparing the entropy and the conditional entropy in a marker, an entropy-based index has been presented for fine-scale linkage disequilibrium gene mapping using high-density marker maps for human disease genes. Th... By comparing the entropy and the conditional entropy in a marker, an entropy-based index has been presented for fine-scale linkage disequilibrium gene mapping using high-density marker maps for human disease genes. The index can quantify the level of linkage disequilibrium (LD) between the marker and the disease susceptibility locus (DSL) of genes. The advantage of using the index is attributed to the fact that it does not depend on marker allele frequencies across loci. Moreover, it is parallel to Hardy-Weinberg disequilibrium (HWD) measure for DSL fine mapping. Through various simulations, the fine mapping perform- ances of the proposed entropy-based index was extensively investigated under various genetic parameters. The results show that the index presented is both robust and powerful for DSL mapping in genes. 展开更多
关键词 entropy entropy-based index fine mapping
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An Entropy-based Index for Fine-scale Mapping of QTL
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作者 向阳 李玉梅 +1 位作者 刘再明 孙振球 《Journal of Genetics and Genomics》 SCIE CAS CSCD 北大核心 2007年第4期373-380,共8页
By comparing the entropy and conditional entropy in a marker, an entropy-based index for fine-scale linkage-disequilibrium gene mapping is presented using high-density marker maps in extreme samples for quantitative t... By comparing the entropy and conditional entropy in a marker, an entropy-based index for fine-scale linkage-disequilibrium gene mapping is presented using high-density marker maps in extreme samples for quantitative trait. The entropy-based index is the function of LD between the marker and the traitlocus and does not depend on marker allele frequencies across the loci. It is parallel to Hardy-Weinberg disequilibrium (HWD) measure for QTL fine mapping, but its power of fine mapping QTL is higher than that of HWD measure. Through simulations, the fine mapping performance of this entropy-based index is investigated extensively under various genetic parameters. The results show that the indices presented here are both robust and powerful. 展开更多
关键词 entropy entropy-based index QTL fine mapping
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Comparison of Entropy vs. Bispectral Index Anesthetic Depth Monitoring during Isoflurane Anesthesia in Living Donor Liver Transplantation: Observational Study
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作者 Sang Hyun Lee Janie Jang +4 位作者 Kyunga Kim Heejin Yoo Yu Jeong Bang Ji-Won Choi Gaab Soo Kim 《Open Journal of Anesthesiology》 2021年第5期137-148,共12页
Liver transplantation (LT) recipients are known to require less anesthetic agents. Providing minimally required anesthetics while avoiding awareness is especially important in LT recipients because it would help manag... Liver transplantation (LT) recipients are known to require less anesthetic agents. Providing minimally required anesthetics while avoiding awareness is especially important in LT recipients because it would help manage perioperative hemodynamic instability with less vasopressor and fast track recovery. This study aims to compare state entropy (SE) against bispectral index (BIS) during isoflurane anesthesia in LT. We adjusted anesthesia to BIS values 40 - 60, and compared it with concomitant SE values. BIS, SE values, and anesthetic requirements according to liver failure severity, etiology and LT stages were analyzed. For BIS-SE differences, SE value that is different from the concomitant BIS by more than 15 was defined as a significant disagreement. Mann Whitney, Kruskal Wallis test and a Poisson exact test were used for analysis. The BIS-SE pair sets of 2895 from 38 patients were analyzed. BIS, SE values and anesthetic requirements were significantly lower in MELD ≥ 20 (p < 0.001 in all) and in alcoholic etiology (p < 0.001 in all). For BIS-SE differences, 320 disagreement data pairs were seen at a rate of 1.33 times/hr (95% CI = [1.19, 1.48], p < 0.001). A significant disagreement was delineated in MELD score ≥ 20 (3.04 times/hr, CI = [2.64, 3.49], p < 0.001), alcoholic etiology (3.19 times/hr, [2.67, 3.78], p < 0.001) and postreperfusion stage (1.63 times/hr, [1.43, 1.85], p < 0.001). In these significant BIS-SE differences, 95.9% (307/320 disagreement data pairs) showed higher BIS than SE. In conclusion, in high MELD and alcoholic etiology, anesthetic requirements were significantly less, and BIS and SE showed great discrepancy with lower SE values. Therefore, when SE monitoring is used during LT, anesthesiologists may need to consider that in high MELD and alcoholic etiology, SE tends to show lower values than the concomitant BIS values that are within optimal anesthetic depth ranges. 展开更多
关键词 Anesthetic Depth Bispectral index entropy Liver Transplantation ISOFLURANE
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A modified method to calculate reliability index using maximum entropy principle 被引量:3
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作者 徐志军 郑俊杰 +1 位作者 边晓亚 刘勇 《Journal of Central South University》 SCIE EI CAS 2013年第4期1058-1063,共6页
Routine reliability index method, first order second moment (FOSM), may not ensure convergence of iteration when the performance function is strongly nonlinear. A modified method was proposed to calculate reliability ... Routine reliability index method, first order second moment (FOSM), may not ensure convergence of iteration when the performance function is strongly nonlinear. A modified method was proposed to calculate reliability index based on maximum entropy (MaxEnt) principle. To achieve this goal, the complicated iteration of first order second moment (FOSM) method was replaced by the calculation of entropy density function. Local convergence of Newton iteration method utilized to calculate entropy density function was proved, which ensured the convergence of iteration when calculating reliability index. To promote calculation efficiency, Newton down-hill algorithm was incorporated into calculating entropy density function and Monte Carlo simulations (MCS) were performed to assess the efficiency of the presented method. Two numerical examples were presented to verify the validation of the presented method. Moreover, the execution and advantages of the presented method were explained. From Example 1, after seven times iteration, the proposed method is capable of calculating the reliability index when the performance function is strongly nonlinear and at the same time the proposed method can preserve the calculation accuracy; From Example 2, the reliability indices calculated using the proposed method, FOSM and MCS are 3.823 9, 3.813 0 and 3.827 6, respectively, and the according iteration times are 5, 36 and 10 6 , which shows that the presented method can improve calculation accuracy without increasing computational cost for the performance function of which the reliability index can be calculated using first order second moment (FOSM) method. 展开更多
关键词 reliability index maximum entropy principle first order second moment Newton iteration Monte Carlo simulation
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High impedance fault detection in distribution network based on S-transform and average singular entropy 被引量:3
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作者 Xiaofeng Zeng Wei Gao Gengjie Yang 《Global Energy Interconnection》 EI CAS CSCD 2023年第1期64-80,共17页
When a high impedance fault(HIF)occurs in a distribution network,the detection efficiency of traditional protection devices is strongly limited by the weak fault information.In this study,a method based on S-transform... When a high impedance fault(HIF)occurs in a distribution network,the detection efficiency of traditional protection devices is strongly limited by the weak fault information.In this study,a method based on S-transform(ST)and average singular entropy(ASE)is proposed to identify HIFs.First,a wavelet packet transform(WPT)was applied to extract the feature frequency band.Thereafter,the ST was investigated in each half cycle.Afterwards,the obtained time-frequency matrix was denoised by singular value decomposition(SVD),followed by the calculation of the ASE index.Finally,an appropriate threshold was selected to detect the HIFs.The advantages of this method are the ability of fine band division,adaptive time-frequency transformation,and quantitative expression of signal complexity.The performance of the proposed method was verified by simulated and field data,and further analysis revealed that it could still achieve good results under different conditions. 展开更多
关键词 High impedance fault(HIF) Wavelet packet transform(WPT) S-transform(ST) Singular entropy(se)
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Evaluation on Ecological Environment of City Based on Entropy and Dissipative Structure Theory—In Case of Dangyang in Hubei Province 被引量:1
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作者 Ximing Sun Xia Liu 《Engineering(科研)》 2013年第2期202-206,共5页
Evaluation on ecological environment system is to describe and assess the quality of ecological environment, and accurately reflect the ecological environmental quality and pollution situation. In this paper, after re... Evaluation on ecological environment system is to describe and assess the quality of ecological environment, and accurately reflect the ecological environmental quality and pollution situation. In this paper, after reviewing the domestic and foreign relative researches, from the theory perspective of the dissipative structure of complex system, we analyzed the city ecological system dissipative structure characteristic, and discussed the process forming dissipative structure, then we constructed the city ecosystem entropy parameter table and entropy evaluated model. The total entropy dynamic, scientifically reflects the city ecology system level and developing trend, so in fact it provides the theory basis and method to improve the overall quality of ecological environment, finally we took Dangyang as a case study, and got the same conclusion with the actual situation. 展开更多
关键词 entropy DISSIPATIVE Structure EVALUATION index System
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The remote sensing composite information entropy and types of Nansha coral reef atolls
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作者 刘宝银 王岩峰 +1 位作者 高俊国 郝庆祥 《Acta Oceanologica Sinica》 SCIE CAS CSCD 1999年第3期389-400,共12页
In the viempint that the coral reef atolls' growth index of the Nansha Islands is influenced by many factors, the measured remote sensing comopite information including some mutually related factors is divided int... In the viempint that the coral reef atolls' growth index of the Nansha Islands is influenced by many factors, the measured remote sensing comopite information including some mutually related factors is divided into 10 geographic events as N1, N2 ..., N10, and the analysis of the atolls' information entropy is made. From the value of theentropy, the closed related factors with the index of the emerged atolls are shown. In proper order, the factors are reeftop's area(0. 319), lagoon's area(0. 324), open-degree of atoll(0. 336), trend of atoll(0. 551 ). On the basis of thiswork, a new description function of the emerged atoll growth index is proposed. This function can be used to identifythe open my of Nansha atoll growth. 展开更多
关键词 Nansha Islands remote sensing information information entropy growth index atoll's types
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A variation pixels identification method based on kernel spatial attraction model and local entropy for robust endmember extraction
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作者 赵春晖 田明华 +1 位作者 齐滨 王玉磊 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第8期1990-2000,共11页
A variation pixels identification method was proposed aiming at depressing the effect of variation pixels, which dilates the theoretical hyperspectral data simplex and misguides volume evaluation of the simplex. With ... A variation pixels identification method was proposed aiming at depressing the effect of variation pixels, which dilates the theoretical hyperspectral data simplex and misguides volume evaluation of the simplex. With integration of both spatial and spectral information, this method quantitatively defines a variation index for every pixel. The variation index is proportional to pixels local entropy but inversely proportional to pixels kernel spatial attraction. The number of pixels removed was modulated by an artificial threshold factor α. Two real hyperspectral data sets were employed to examine the endmember extraction results. The reconstruction errors of preprocessing data as opposed to the result of original data were compared. The experimental results show that the number of distinct endmembers extracted has increased and the reconstruction error is greatly reduced. 100% is an optional value for the threshold factor α when dealing with no prior knowledge hyperspectral data. 展开更多
关键词 variation pixels hyperspectral SIMPLEX variation index local entropy kernel spatial attraction
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RAPD Markers and Genetic Information Entropy in Environmental Monitoring: A Case Study with Wild Mushrooms
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作者 Charoula Psallida Dimitrios Argyropoulos 《Journal of Geoscience and Environment Protection》 2023年第9期28-39,共12页
Mushrooms have a remarkable scientific value due to their nutritional, medicinal properties and industrial applications in enzyme production, so that effort in the maintenance of native wild mushroom varieties is incr... Mushrooms have a remarkable scientific value due to their nutritional, medicinal properties and industrial applications in enzyme production, so that effort in the maintenance of native wild mushroom varieties is increasing. The present study focuses on the use of Random Amplified Polymorphic DNA (RAPD) markers for biodiversity measure of wild mushroom species of the Northwest mountainous region of Greece. Data mining of similarity matrices from RAPD analysis was used to extract measurable entropy parameters for mushroom biodiversity monitoring based on Shannon’s information entropy. Shannon information index provides an easy assessment of the entropy of the genetic information of the germplasm per mushroom species while the total equitability index (E<sub>H</sub>) = 0.871 offers an overall estimation of the genetic variation evenness of all species in the population of the studied mushrooms. Application of RAPDs with parallel entropy analysis is an easily applicable and low-cost valuable technology in environmental monitoring, using genetic information of wild mushroom species as an indicator that can lead to future actions in biodiversity maintenance and germplasm protection. The provided methodology can serve as a pilot procedure enriched with other environmental factors to monitor and protect wild mushroom communities native to the Greek countryside or in any part of the world and provide comparable results about biodiversity from different regions using common entropy indices. 展开更多
关键词 Random Amplified Polymorphic DNA Shannon’s index entropy BIODIVERSITY DENDROGRAM
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Anomaly-Resistant Decentralized State Estimation Under Minimum Error Entropy With Fiducial Points for Wide-Area Power Systems
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作者 Bogang Qu Zidong Wang +2 位作者 Bo Shen Hongli Dong Hongjian Liu 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2024年第1期74-87,共14页
This paper investigates the anomaly-resistant decentralized state estimation(SE) problem for a class of wide-area power systems which are divided into several non-overlapping areas connected through transmission lines... This paper investigates the anomaly-resistant decentralized state estimation(SE) problem for a class of wide-area power systems which are divided into several non-overlapping areas connected through transmission lines. Two classes of measurements(i.e., local measurements and edge measurements) are obtained, respectively, from the individual area and the transmission lines. A decentralized state estimator, whose performance is resistant against measurement with anomalies, is designed based on the minimum error entropy with fiducial points(MEEF) criterion. Specifically, 1) An augmented model, which incorporates the local prediction and local measurement, is developed by resorting to the unscented transformation approach and the statistical linearization approach;2) Using the augmented model, an MEEF-based cost function is designed that reflects the local prediction errors of the state and the measurement;and 3) The local estimate is first obtained by minimizing the MEEF-based cost function through a fixed-point iteration and then updated by using the edge measuring information. Finally, simulation experiments with three scenarios are carried out on the IEEE 14-bus system to illustrate the validity of the proposed anomaly-resistant decentralized SE scheme. 展开更多
关键词 Decentralized state estimation(se) measurements with anomalies minimum error entropy unscented Kalman filter wide-area power systems
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The Correlation between the Power Quality Indicators and Entropy Production Characteristics of Wind Power+Energy Storage Systems
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作者 Caifeng Wen Boxin Zhang +3 位作者 Yuanjun Dai Wenxin Wang Wanbing Xie Qian Du 《Energy Engineering》 EI 2024年第10期2961-2979,共19页
Power quality improvements help guide and solve the problems of inefficient energy production and unstable power output in wind power systems.The purpose of this paper is mainly to explore the influence of different e... Power quality improvements help guide and solve the problems of inefficient energy production and unstable power output in wind power systems.The purpose of this paper is mainly to explore the influence of different energy storage batteries on various power quality indicators by adding different energy storage devices to the simulated wind power system,and to explore the correlation between systementropy generation and various indicators,so as to provide a theoretical basis for directly improving power quality by reducing loss.A steady-state experiment was performed by replacing the wind wheel with an electric motor,and the output power qualities of the wind power systemwith andwithout energy storagewere compared and analyzed.Moreover,the improvement effect of different energy storage devices on various indicatorswas obtained.Then,based on the entropy theory,the loss of the internal components of the wind power system generator is simulated and explored by Ansys software.Through the analysis of power quality evaluation indicators,such as current harmonic distortion rate,frequency deviation rate,and voltage fluctuation,the correlation between entropy production and each evaluation indicator was explored to investigate effective methods to improve power quality by reducing entropy production.The results showed that the current harmonic distortion rate,voltage fluctuation,voltage deviation,and system entropy production are positively correlated in the tests and that the power factor is negatively correlated with system entropy production.In the frequency range,the frequency deviationwas not significantly correlated with the systementropy production. 展开更多
关键词 Wind power system entropy production system losses power quality indexes battery energy storage
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p型“SE+PERC”双面太阳电池背面工艺对光伏组件PID效应的影响研究
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作者 王玉肖 王贵梅 +2 位作者 赵英芳 程雅琦 许志卫 《太阳能》 2024年第4期80-86,共7页
基于p型“SE+PERC”双面太阳电池的背面工艺,针对背表面抛光状态、背面氧化铝薄膜厚度、背面膜层结构、背面氮化硅薄膜折射率几个因素对光伏组件电势诱导衰减(PID)效应的影响进行了研究。研究结果表明:1)背表面抛光状态越光滑,对应制备... 基于p型“SE+PERC”双面太阳电池的背面工艺,针对背表面抛光状态、背面氧化铝薄膜厚度、背面膜层结构、背面氮化硅薄膜折射率几个因素对光伏组件电势诱导衰减(PID)效应的影响进行了研究。研究结果表明:1)背表面抛光状态越光滑,对应制备的光伏组件在PID测试后的输出功率损失率越小;2)背面氧化铝薄膜厚度为10 nm及以上时对应制备的光伏组件在PID测试后的输出功率损失率差异不大;3)背面膜层结构对PID效应存在影响,合理设计背面膜层结构可以有效抑制光伏组件PID效应;4)背面氮化硅薄膜折射率大于等于2.10时,对应制备的光伏组件在PID测试后的输出功率损失率降至2.00%以内且可以稳定保持在较低水平。研究结果可为p型“SE+PERC”双面太阳电池背面工艺优化提供指导方向。 展开更多
关键词 p型晶体硅 se+PERC 双面太阳电池 电势诱导衰减 背面工艺 抛光 氧化铝薄膜 折射率
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基于SE-DEA模型的电网规划方案综合决策体系 被引量:47
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作者 韦钢 吴伟力 +1 位作者 刘佳 张鑫 《电网技术》 EI CSCD 北大核心 2007年第24期12-16,27,共6页
为解决电网规划方案综合决策过程的复杂性,建立了基于SE-DEA模型的多属性多目标电网规划方案综合决策体系,给出了一套综合评价指标集,通过合理选择输入、输出指标以及处理指标集中的定量和定性数据,形成了完整的综合决策方法,根据综合... 为解决电网规划方案综合决策过程的复杂性,建立了基于SE-DEA模型的多属性多目标电网规划方案综合决策体系,给出了一套综合评价指标集,通过合理选择输入、输出指标以及处理指标集中的定量和定性数据,形成了完整的综合决策方法,根据综合产出与综合投入的比率值实现了对电网规划方案的综合排序和选优。实例结果表明,该综合决策体系理论清晰、计算方便、结果直观,具有一定的应用价值。 展开更多
关键词 电网规划 综合决策 数据包络分析(DEA)se-DEA 模型 指标集 德尔菲法
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柘林湾赤潮与Fe、Mn、Se和营养盐指数的关系 被引量:3
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作者 杨秀环 唐宝英 +2 位作者 吴京洪 曾尊祥 张展霞 《中山大学学报(自然科学版)》 CAS CSCD 北大核心 2000年第5期58-62,共5页
1997年底广东省柘林湾发生褐囊藻 (Phaeocystispouchetii)赤潮期间 ,水体、沉积物和赤潮生物中Fe、Mn的质量含量很高 .借助叶绿素a与海洋初级生产力呈正相关性 ,探讨了褐囊藻赤潮与Fe、Mn。
关键词 营养盐指数 广东 柘林湾 赤潮
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基于熵的动态收缩sEMG信号疲劳特征分析 被引量:12
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作者 陈伟婷 王志中 +1 位作者 胡晓 李晓浦 《中国医学物理学杂志》 CSCD 2006年第3期204-208,共5页
频谱分析方法常被用来检测肌肉疲劳过程。本文将频率分析和非线性动力学方法结合起来,基于表面肌电(sEMG)信号在不同频率分布不均匀的特点将信号能量分解到不同频带,以此计算功率谱/小波包和熵相结合的功率谱熵/小波包熵来衡量系统的复... 频谱分析方法常被用来检测肌肉疲劳过程。本文将频率分析和非线性动力学方法结合起来,基于表面肌电(sEMG)信号在不同频率分布不均匀的特点将信号能量分解到不同频带,以此计算功率谱/小波包和熵相结合的功率谱熵/小波包熵来衡量系统的复杂度,进而衡量肌肉的疲劳程度,为用EMG信号研究动态收缩过程中的肌肉疲劳程度提供了新的分析手段和方法。文中方法也适用于其它生物医学信号的分析。 展开更多
关键词 表面肌电信号 动态收缩 疲劳度 功率谱熵 小波包熵
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基于Entropy-Topsis模型的军工企业自主创新能力分析与测评 被引量:12
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作者 尹航 石光 李柏洲 《运筹与管理》 CSSCI CSCD 北大核心 2013年第3期139-145,共7页
军工企业要提高自主创新能力、努力增强核心竞争力,必须明确地定位创新型企业的发展目标,转型升级军工企业的科技创新模式。本文基于军工企业的自主创新特征,剖析自主创新能力的影响因素,从研发能力、生产能力、投入能力、成果能力和管... 军工企业要提高自主创新能力、努力增强核心竞争力,必须明确地定位创新型企业的发展目标,转型升级军工企业的科技创新模式。本文基于军工企业的自主创新特征,剖析自主创新能力的影响因素,从研发能力、生产能力、投入能力、成果能力和管理能力等视角设置测评指标,建立Entropy-Topsis评价模型,继而测评25个典型军工企业的自主创新能力,验证测评指标和评价模型的科学性和适用性。 展开更多
关键词 军工企业 自主创新能力 指标体系 entropy—Topsis模型
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基于PCA-Entropy的区域公路交通发展水平综合评价 被引量:8
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作者 王首绪 朱鹏 +1 位作者 乔鹏 梁莎莎 《交通科学与工程》 2011年第2期74-79,共6页
为解决区域公路交通发展水平评价过程中指标众多、权重客观性难以保证等问题,提出了一种主成分分析法与熵值法相结合的组合评价方法.采用主成分分析法,消除指标之间信息相关性,简化了指标体系.通过熵值法进行客观赋权,进而建立了基于PCA... 为解决区域公路交通发展水平评价过程中指标众多、权重客观性难以保证等问题,提出了一种主成分分析法与熵值法相结合的组合评价方法.采用主成分分析法,消除指标之间信息相关性,简化了指标体系.通过熵值法进行客观赋权,进而建立了基于PCA-Entropy的区域公路交通发展水平综合评价模型.以山东省为例,进行了实例验证.研究结果表明,该模型合理、有效. 展开更多
关键词 主成分分析 熵值 指标体系 公路交通
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基于集值统计-Entropy的采空区自燃危险性预测模型及应用 被引量:13
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作者 祁云 齐庆杰 +1 位作者 汪伟 周新华 《安全与环境学报》 CAS CSCD 北大核心 2019年第5期1526-1531,共6页
针对采空区遗煤自燃危险影响因素多且具有突发性和不确定性、对其进行定量分析难度较大的问题,提出了基于集值统计-Entropy的综合确权模糊预测法对采空区遗煤自燃危险性进行预测与分析。通过引入修正系数和向量内积优化预测评价模型,减... 针对采空区遗煤自燃危险影响因素多且具有突发性和不确定性、对其进行定量分析难度较大的问题,提出了基于集值统计-Entropy的综合确权模糊预测法对采空区遗煤自燃危险性进行预测与分析。通过引入修正系数和向量内积优化预测评价模型,减小主客观因素对预测结果的影响。基于层次分析原理建立了采空区自燃危险2级预测模型,分析各权重置信度,预测自燃危险性等级。将该模型应用于晋牛煤矿1303工作面采空区,自燃危险预测结果与实际情况吻合较好,实证了基于集值统计-Entropy的模糊数学模型对采空区遗煤自燃危险性预测的科学性,与经典AHP法相比预测过程更直观,预测结果更准确,为采空区自燃灾害有效防治提供了一种新的理论依据。 展开更多
关键词 安全工程 采空区 遗煤自燃 模糊数学 集值统计-entropy模型 指标权重
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我国省级层面县域医共体政策注意力演变研究
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作者 谭浩 王力 +5 位作者 王军永 刘霞 梅杰 周佳佳 刘雨璇 余苏珍 《中国医院》 北大核心 2025年第1期9-15,共7页
目的:分析省级县域医共体政策注意力演变过程与规律,以期为后续政策的制定与优化提供参考。方法:将省级县域医共体政策划分为探索期和试点期两个阶段,以及东部、中部、西部3个地区,以政策注意力理论为指导,分析各阶段、各地区的县域医... 目的:分析省级县域医共体政策注意力演变过程与规律,以期为后续政策的制定与优化提供参考。方法:将省级县域医共体政策划分为探索期和试点期两个阶段,以及东部、中部、西部3个地区,以政策注意力理论为指导,分析各阶段、各地区的县域医共体政策注意力强度与政策注意力配置,并运用PMC指数模型对不同阶段、不同地区的县域医共体政策文本进行政策注意力综合量化评价。结果:省级县域医共体政策注意力存在时空差异。在时间维度表现为省级政策以中央政策为导向,试点期政策注意力强度大于探索期,政策注意力配置随中央政策注意力的侧重而转移;在空间维度上,省级县域医共体政策注意力水平地域差异性较大,东部省份较高,中部地区次之,西部地区较低。结论:省级县域医共体政策出台一方面要坚持中央导向与地方创新的统一,既要在中央政策的指导下进行政策制定,又要根据地域实际情况进行区域特征性政策创新;另一方面要坚持顶层支持与区域合作的统一,既需要由中央对县域医共体政策注意力水平较低的地区进行垂直的专项支持,又要发挥近邻效应与示范效应的作用进行区域间的平行合作,以提升县域医共体政策水平。 展开更多
关键词 县域医共体 政策注意力 熵值法 社会网络分析 PMC指数模型
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基于SE-DEA的电网企业资源配置效率评价 被引量:7
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作者 王宁 牛东晓 《电力需求侧管理》 2009年第3期23-26,33,共5页
资源配置效率是衡量企业各要素之间,以及企业内部与外部环境之间的和谐程度的核心指标。有效提高资源配置效率是增强电网企业竞争力的重要途径之一。结合电网企业的实际情况,构建了基于超效率数据包络分析(SE-DEA)的电网企业资源配置效... 资源配置效率是衡量企业各要素之间,以及企业内部与外部环境之间的和谐程度的核心指标。有效提高资源配置效率是增强电网企业竞争力的重要途径之一。结合电网企业的实际情况,构建了基于超效率数据包络分析(SE-DEA)的电网企业资源配置效率评价模型,以9家电网企业为例,对其资源配置效率进行比较分析。实例结果表明,此方法实现了对所有决策单元的充分评价与排序,可对电网企业的资源配置效率进行有效的评价。 展开更多
关键词 资源配置效率 数据包络分析 se-DEA模型 标体系 电网企业
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