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Empirical Likelihood Statistical Inference for Compound Poisson Vector Processes under Infinite Covariance Matrix
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作者 程从华 《Journal of Donghua University(English Edition)》 CAS 2023年第1期122-126,共5页
The paper discusses the statistical inference problem of the compound Poisson vector process(CPVP)in the domain of attraction of normal law but with infinite covariance matrix.The empirical likelihood(EL)method to con... The paper discusses the statistical inference problem of the compound Poisson vector process(CPVP)in the domain of attraction of normal law but with infinite covariance matrix.The empirical likelihood(EL)method to construct confidence regions for the mean vector has been proposed.It is a generalization from the finite second-order moments to the infinite second-order moments in the domain of attraction of normal law.The log-empirical likelihood ratio statistic for the average number of the CPVP converges to F distribution in distribution when the population is in the domain of attraction of normal law but has infinite covariance matrix.Some simulation results are proposed to illustrate the method of the paper. 展开更多
关键词 compound Poisson vector process(CPVP) infinite covariance matrix domain of attraction of normal law empirical likelihood(EL)
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THE EXTREMES OF DEPENDENT CHI-PROCESSES ATTRACTED BY THE BROWN-RESNICK PROCESS
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作者 孙俊杰 谭中权 《Acta Mathematica Scientia》 SCIE CSCD 2024年第2期686-701,共16页
Motivated by some recent works on the topic of the Brown-Resnick process, we study the functional limit theorem for normalized pointwise maxima of dependent chi-processes. It is proven that the properly normalized poi... Motivated by some recent works on the topic of the Brown-Resnick process, we study the functional limit theorem for normalized pointwise maxima of dependent chi-processes. It is proven that the properly normalized pointwise maxima of those processes are attracted by the Brown-Resnick process. 展开更多
关键词 chi-processes Brown-Resnick process pointwise maxima functional limit theorem
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Empirical Verification of Swanson’s Caring Processes Found in Nursing Actions: Systematic Review 被引量:2
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作者 Mary Kalfoss Jenny Owe 《Open Journal of Nursing》 2015年第11期976-986,共11页
Caring has long been recognized as central to nursing and is increasingly posited as a core concept although developing a theoretical description of caring which is adequate in the 21st. century continues to be a diff... Caring has long been recognized as central to nursing and is increasingly posited as a core concept although developing a theoretical description of caring which is adequate in the 21st. century continues to be a difficult task for nursing scholars. Consequently, verifying existing theoretical structures of caring remains an ongoing challenge. The aim of this article is to provide empirical verification of the caring processes of “knowing,” “being with,” “doing for,” “enabling” and “maintaining belief” from Swanson’s Middle Range Caring Theory based on the categorization of nursing actions from a systematic literature review on care. Methods: A systematic literature review was conducted in the fields of nursing sciences, medicine and psychology. Purposeful sampling was carried out covering a period from 2003-2013. The final sample included 25 articles. Results: Major themes of nursing actions included “knowing” which consisted of centering, nurturing, informed understanding, assessment skills, communication and respect for individual differences. “Being with” was characterized by intimate relationship, connecting, presencing, emotional adaptability awareness of self/other and decentering. “Doing for” included competence, knowledge, professional/technical skills, helping actions, anticipatory, multidisciplinary and preserving dignity. “Enabling” was characterized by self care, commitment, complexity of care, appropriate communication, information/education, sharing power, enabling choice and ongoing validation. Finally, “maintaining belief” was characterized by spiritual being, humanistic view, harmonious balance, hope, love, and compassion, meaning, and religious and spiritual orientation. Conclusion: Empirical verification was shown for the caring processes described in Swanson’s Caring Theory grounded in concrete nursing actions. 展开更多
关键词 CARING processes empirical INDICATORS NURSING ACTIONS SEMANTICS Swanson’s Middle Range CARING Theory
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On the Functional Empirical Process and Its Application to the Mutual Influence of the Theil-Like Inequality Measure and the Growth
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作者 Pape Djiby Mergane Gane Samb Lo 《Applied Mathematics》 2013年第7期986-1000,共15页
We set in this paper a coherent theory based on functional empirical processes that allows to consider both the poverty and the inequality indices in one Gaussian field in which the study of the influence of the one o... We set in this paper a coherent theory based on functional empirical processes that allows to consider both the poverty and the inequality indices in one Gaussian field in which the study of the influence of the one over the other is done. We use the General Poverty Index (GPI), that is a class of poverty indices gathering the most common ones and a functional class of inequality measures including the Entropy Measure, the Mean Logarithmic Deviation, the different inequality measures of Atkinson, Champernowne, Kolm and Theil called Theil-Like Inequality Measures (TLIM). Our results are given in a unified approach with respect to the two classes instead of their particular elements. We provide the asymptotic laws of the variations of each class over two given periods and the ratio of the variation and derive confidence intervals for them. Although the variances may seem somehow complicated, we provide R codes for their computations and apply the results for the pseudo-panel data for Senegalwith a simple analysis. 展开更多
关键词 functional empirical Process Asymptotic NORMALITY WELFARE and Inequality Measure Weak LAWS Pro and Anti-Poor GROWTH
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ON THE RESPONSE FUNCTIONALS OF MATERIALS FOR THE IRREVERSIBLE PROCESSES OF THERMODYNAMICS
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作者 胡建阳 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 1994年第3期60-65,共6页
Based on the continuum physics and taking intoaccount variation of the heat dissipation,Helmholtz free ener-gy,internal energy and exothermicity with the thermodynamicprocess,in this paper,the functional equations of ... Based on the continuum physics and taking intoaccount variation of the heat dissipation,Helmholtz free ener-gy,internal energy and exothermicity with the thermodynamicprocess,in this paper,the functional equations of the general-ized stress and entropy associated with the time and temperatureare derived for the irreversible process of thermoviscoelastic-plastic materials.As an example,the response functionals ofMaxwell viscoelastic materials are obtained. 展开更多
关键词 viscoelasto-plastic MATERIALS IRREVERSIBLE process response functional generalized stress entropy heat DISSIPATION
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APPROXIMATION OF ADDITIVE FUNCTIONALS OF THE SYMMETRIC HUNT PROCESSES AND ITS APPLICATION
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作者 冯玉瑚 《Journal of China Textile University(English Edition)》 EI CAS 1996年第2期84-92,共9页
Approximate theorem of positive continuous additive functionals is discussed and then used to give a d-dimensional analogue to the representation of additive functiouals of one-dimensional Brownian Motion with respect... Approximate theorem of positive continuous additive functionals is discussed and then used to give a d-dimensional analogue to the representation of additive functiouals of one-dimensional Brownian Motion with respect to local time. 展开更多
关键词 : SYMMETRIC HUNT process ADDITIVE functional SMOOTH measure BROWNIAN motion local time
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Empirical Investigation of Treatment of Sour Gas by Novel Technology: Energy Optimization
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作者 Ehsan Monfared Farshad Farahbod 《American Journal of Analytical Chemistry》 CAS 2023年第4期175-183,共9页
The sour gas sweetening is one of the main processes in gas industries. Gas sweetening is done through chemical processes. Therefore, it requires high cost and energy. The results show that increasing the operating te... The sour gas sweetening is one of the main processes in gas industries. Gas sweetening is done through chemical processes. Therefore, it requires high cost and energy. The results show that increasing the operating temperature increases the mass transfer coefficient and increases the mass transfer rate. Theoretical and experimental data show that sulfur removal in 4.5 W magnetic field is desirable. The increase in sulfur removal percentage in the magnetic field of 4.5 W and 6.75 W is about 16.4% and 15.2%, respectively. According to the obtained results, the effect of temperature increase from 18.8°C to 23.4°C is more evident than the effect of temperature change from 23.4°C to 32.2°C. Because more thermal energy is needed to provide higher temperatures. Therefore, the temperature of 23.4°C is reported as the optimal temperature. The results of this research show that the percentage of sulfur removal is also high at this temperature. 展开更多
关键词 Oil and Gas Industries Optimized Energy Treatment Process empirical Investigation
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REPRESENTATION OF ADDITIVE FUNCTIONALS AND LOCAL TIMES FOR JUMP MARKOV PROCESSES AND THEIR FUNCTIONAL LIMIT THEOREM
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作者 蒋义文 刘禄勤 《Acta Mathematica Scientia》 SCIE CSCD 2003年第1期117-123,共7页
The representation of additive functionals and local times for jump Markovprocesses are obtained. The results of uniformly functional moderate deviation and theirapplications to birth-death processes are also presented.
关键词 加性泛函 跳跃Markov过程 泛函极限定理 局部时 中等偏差 生死过程 不连续点
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Phosphatidylserine:An overview on functionality,processing techniques,patents,and prospects
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作者 Jingnan Chen Jun Li +4 位作者 Haoyu Xu Jiaxi Li Yonghong Yuan Xuebing Xu Yanlan Bi 《Grain & Oil Science and Technology》 CAS 2023年第4期206-218,共13页
Phosphatidylserine(PS)is the part of cell structure in the body and has many beneficial functions especially in brain-related aging diseases.Although daily foods can provide PS to human body,the amount is very limited... Phosphatidylserine(PS)is the part of cell structure in the body and has many beneficial functions especially in brain-related aging diseases.Although daily foods can provide PS to human body,the amount is very limited due to its poverty in most foods.To overcome the issue,numerous studies based on PS have been reported to develop PS-related supplements.In this review,PS was comprehensively and critically reviewed from the view of resources,functions,processing techniques,patents,and prospects.For resources,animal,plant,and microorganism origins were all covered with their differences in composition profiles.For functions,benefits regarding memory,cognitive enhancement,exercise performance,reducing Alzheimer’s disease,and attention-deficit hyperactivity disorder symptoms were covered as well as the functional differences among animal-,plant-,and microorganism-based PS-related supplements.For processing techniques,traditional extracting methods from animal,plant,and microorganism tissues were comparatively discussed with enzymatic synthesis based on different reaction systems.Finally,patents of PS-related supplements were evaluated as well as their applications.This review could provide scientific and valuable support for PS industry. 展开更多
关键词 PHOSPHATIDYLSERINE functionalITY Processing techniques Patents evaluation PROSPECTS
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Multi-output Gaussian Process Regression Model with Combined Kernel Function for Polyester Esterification Processes
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作者 王恒骞 耿君先 陈磊 《Journal of Donghua University(English Edition)》 CAS 2023年第1期27-33,共7页
In polyester fiber industrial processes,the prediction of key performance indicators is vital for product quality.The esterification process is an indispensable step in the polyester polymerization process.It has the ... In polyester fiber industrial processes,the prediction of key performance indicators is vital for product quality.The esterification process is an indispensable step in the polyester polymerization process.It has the characteristics of strong coupling,nonlinearity and complex mechanism.To solve these problems,we put forward a multi-output Gaussian process regression(MGPR)model based on the combined kernel function for the polyester esterification process.Since the seasonal and trend decomposition using loess(STL)can extract the periodic and trend characteristics of time series,a combined kernel function based on the STL and the kernel function analysis is constructed for the MGPR.The effectiveness of the proposed model is verified by the actual polyester esterification process data collected from fiber production. 展开更多
关键词 seasonal and trend decomposition using loess(STL) multi-output Gaussian process regression combined kernel function polyester esterification process
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A review of functional MRI application for brain research of Chinese language processing
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作者 Jianqiao Ge Jia-Hong Gao 《Magnetic Resonance Letters》 2023年第1期1-13,I0002,共14页
As one of the most widely used languages in the world,Chinese language is distinct from most western languages in many properties,thus providing a unique opportunity for understanding the brain basis of human language... As one of the most widely used languages in the world,Chinese language is distinct from most western languages in many properties,thus providing a unique opportunity for understanding the brain basis of human language and cognition.In recent years,non-invasive neuroimaging techniques such as magnetic resonance imaging(MRI)blaze a new trail to comprehensively study specific neural correlates of Chinese language processing and Chinese speakers.We reviewed the application of functional MRI(fMRI)in such studies and some essential findings on brain systems in processing Chinese.Specifically,for example,the application of task fMRI and resting-state fMRI in observing the process of reading and writing the logographic characters and producing or listening to the tonal speech.Elementary cognitive neuroscience and several potential research directions around brain and Chinese language were discussed,which may be informative for future research. 展开更多
关键词 functional MRI Language task Chinese language processing Human brain RESTING-STATE
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Physical Properties of the Function and Number of Empirical Macrohardness of the Material: Universal Physical Unit of Measurement of Macro Hardness (Part 2)
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作者 Shtyrov Nikolay 《Journal of Mechanics Engineering and Automation》 2023年第3期79-91,共13页
Results of analytical studies of the physical properties of the function and number of empirical macrohardness based on the standard experimental force diagram of kinetic macroindentation by a sphere.An analytical com... Results of analytical studies of the physical properties of the function and number of empirical macrohardness based on the standard experimental force diagram of kinetic macroindentation by a sphere.An analytical comparison method and a criterion for the similarity of the physical and empirical macrohardness of a material are proposed.The physical properties of the hardness measurement process using the Calvert-Johnson method are shown.The physical reasons for the size effect when measuring macrohardness are considered.The universal physical unit and standard of macrohardness of kinetic macroindentation by a sphere is substantiated. 展开更多
关键词 Physical theory of kinetic indentation method for determining the function and number of physical macrohardness ratio of empirical and physical macrohardness of a material universal physical unit of macrohardness.
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基于REOF的两种卫星降水产品(IMERG和MSWEP)在金沙江流域降水分区尺度精度评估
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作者 薄会娟 林青霞 +2 位作者 李璐 魏冲 龚成麒 《湖泊科学》 EI CAS CSCD 2024年第2期620-633,共14页
高时空分辨率降水产品的精度评估是卫星降水用于水文气象干旱等研究的前提。本研究提出在降水分区尺度下评估IMERG和MSWEP两种卫星降水产品的精度,并与不分区尺度(即流域尺度)进行比较。首先采用旋转经验正交函数(REOF)对金沙江流域(JSB... 高时空分辨率降水产品的精度评估是卫星降水用于水文气象干旱等研究的前提。本研究提出在降水分区尺度下评估IMERG和MSWEP两种卫星降水产品的精度,并与不分区尺度(即流域尺度)进行比较。首先采用旋转经验正交函数(REOF)对金沙江流域(JSB)进行降水分区,通过贡献率得出8个分区较为适合。然后识别降水的空间分布特征,发现2种降水产品都可以很好地捕捉降水呈现出的从上游到下游逐渐增加的趋势。最后在日尺度、降水发生概率和极端降水探测能力3个方面对降水产品在分区尺度和不分区尺度的性能进行评估。结果表明,在日尺度上,MSWEP的精度在多数降水分区优于IMERG,被推荐5次(1、3、6、7和8区),集中在流域的中游。同时流域尺度也推荐MSWEP。在降水事件发生概率方面,MSWEP能再现不同等级降水强度的概率密度分布,但过高估计0.1~1 mm/d降水事件的发生概率;而IMERG过高估计小于0.1 mm/d降水事件的概率。在极端降水探测能力方面,流域尺度的KGE值都是正值,且IMERG优于MSWEP,但分区尺度上,KGE值在部分降水分区中存在负值,表明IMERG和MSWEP均不能很好地探测出该区的极端降水事件。本研究成果表明降水分区尺度是必需的,能够更加精细地评估降水产品。研究结果可为具有类似气候条件的卫星降水评估提供参考。 展开更多
关键词 降水分区 旋转经验正交函数 IMERG MSWEP 精度评估
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模态分解的电能质量检测探究实验教学实践
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作者 窦震海 王雅静 +1 位作者 梅宇 张祥珂 《计算机仿真》 2024年第1期293-300,共8页
针对“现代信号处理”课程的教学难点,以模态分解法(EMD)的电能质量扰动信号检测为例,进行了探究性实验教学仿真与实践。在教学过程中,引导学生对传统EMD电能质量检测法精度偏低的问题进行探究。然后根据探究结果,融合SVD滤波、ICEEMDA... 针对“现代信号处理”课程的教学难点,以模态分解法(EMD)的电能质量扰动信号检测为例,进行了探究性实验教学仿真与实践。在教学过程中,引导学生对传统EMD电能质量检测法精度偏低的问题进行探究。然后根据探究结果,融合SVD滤波、ICEEMDAN及排列熵(PE)等多种现代信号处理技术,提出了SVD-ICEEMDAN-PE的电能质量扰动检测方法,能够提高精测精度。在此基础上,设计信号降噪、算法性能分析、扰动信号检测、实验信号检测等多个仿真对方法的有效性进行了验证。探究性实验教学是理论教学的延伸和拓展,教学过程注重以学生为中心,引导学生体会思考-探索-解决问题的科研方法,从而激发学生求学—求知—钻研的科研精神。 展开更多
关键词 现代信号处理 探究性实验 电能质量 经验模态分解
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基于小震经验格林函数研究中等地震破裂方向性:以2008年攀枝花M_(S)6.1地震为例
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作者 罗艳 赵里 朱音杰 《地球物理学报》 SCIE EI CAS CSCD 2024年第1期144-155,共12页
中小地震破裂方向性研究在确定实际发震面以及地震灾害评估中具有非常重要的意义.本文以2008年8月30日攀枝花M_(S)6.1地震为研究实例,以较小余震作为经验格林函数地震,利用表观震源时间函数随台站方位角变化特性,确定了主震的破裂方向... 中小地震破裂方向性研究在确定实际发震面以及地震灾害评估中具有非常重要的意义.本文以2008年8月30日攀枝花M_(S)6.1地震为研究实例,以较小余震作为经验格林函数地震,利用表观震源时间函数随台站方位角变化特性,确定了主震的破裂方向、破裂尺度以及破裂速度,验证了该方法的适用性和可行性.研究结果表明,主震的破裂方向为几乎正南的184°,破裂长度8.05 km,破裂速度3.35 km·s^(-1),进一步确认了主震震源机制解其中沿南北向的节面是地震实际发震面,主震在水平方向沿着南北向元谋断裂从北往南破裂.攀枝花地震震源破裂速度接近地壳剪切波速度,这可能是造成此次地震虽然震级不大但破坏性严重的重要原因.本文综合分析主震的矩心深度、震源机制解、破裂方向性以及构造应力背景等信息,探讨了地震发生的破裂过程以及灾害严重的原因. 展开更多
关键词 中等地震 破裂方向性 经验格林函数 2008年攀枝花地震
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食用醋粉的制备工艺、营养成分及保健作用研究进展
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作者 李家磊 高扬 +3 位作者 严松 王粟 李波 管立军 《粮食与油脂》 2024年第4期5-8,共4页
综述了食用醋粉的制备工艺、营养成分和保健作用,并对其未来发展进行了展望,以期为食用醋粉的综合利用提供参考。
关键词 食用醋粉 制备工艺 营养成分 保健作用
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基于遗传算法的磨削力模型系数优化及验证
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作者 王栋 张志鹏 +3 位作者 赵睿 张君宇 乔瑞勇 孙少铮 《郑州大学学报(工学版)》 2024年第1期21-28,共8页
在磨削力模型求解问题中,目前大多使用分段计算法或列方程组直接计算各个待求系数,不仅计算量大且其精度也无法保证。另外,传统的回归模型容易陷入局部最优,难以描述非线性关系。为此,将遗传算法引入到非线性优化函数参数优化中,基于外... 在磨削力模型求解问题中,目前大多使用分段计算法或列方程组直接计算各个待求系数,不仅计算量大且其精度也无法保证。另外,传统的回归模型容易陷入局部最优,难以描述非线性关系。为此,将遗传算法引入到非线性优化函数参数优化中,基于外圆横向磨削力模型、平面磨削力模型、外圆纵向磨削力模型等现有的模型数据,开展磨削力理论模型的系数优化方法研究。相关性分析结果表明:通过计算得到的3种模型磨削力的预测精度提高了14.69%~42.54%,且3种模型所预测的法向磨削力的平均误差分别为5.9%、9.13%、3.23%,切向力平均误差分别为6.78%、8.36%、3.69%。经对比知,优化后的模型拟合度较好,模型预测精度显著提高。遗传算法优化后的非线性优化函数GA-LSQ算法更适合磨削力模型的求解,可对磨削力的预测及实际加工生产中的参数优化提供参考。 展开更多
关键词 磨削力模型 外圆磨削 平面磨削 经验公式 模型系数优化 模型预测 遗传算法 非线性优化函数
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基于脑电图的帕金森轻度认知障碍功能网络特征分析
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作者 李昕 张晴 +2 位作者 张莹 谢平 尹立勇 《计量学报》 CSCD 2024年第1期135-144,共10页
帕金森氏轻度认知障碍(PDMCI)是帕金森氏症患者痴呆的先兆,这对使用神经评分量表和医生经验等传统方法进行准确诊断提出了挑战。利用26名PDMCI患者和23名正常人的脑电信号,基于定向传递函数构建了Delta、Theta、Alpha、Beta和Gamma频段... 帕金森氏轻度认知障碍(PDMCI)是帕金森氏症患者痴呆的先兆,这对使用神经评分量表和医生经验等传统方法进行准确诊断提出了挑战。利用26名PDMCI患者和23名正常人的脑电信号,基于定向传递函数构建了Delta、Theta、Alpha、Beta和Gamma频段的脑功能网络。引入了一种新颖的图论特征——效率密度来捕获网络密度和传输效率。研究结果揭示了独特的连接模式,Delta和Theta波段的连接更紧密,而Alpha、Beta和Gamma波段的连接更稀疏。帕金森病(PD)患者与对照组之间的Theta、Alpha、Beta和Gamma频带存在显著差异(p<0.05)。因此,脑功能网络可以有效反映PD脑功能异常状态,效率密度特征可以反映PD脑功能异常活动的特征量。 展开更多
关键词 智能信息处理 帕金森轻度认知障碍 脑电 脑功能网络 特征提取 效率密度
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收入和公共服务对居民幸福感的影响与作用机理研究——来自中国综合社会调查的经验证据
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作者 黄新华 赵晓雯 《秘书》 2024年第2期43-59,共17页
中国综合社会调查数据统计结果显示,收入与幸福感的倒U型关系在统计意义上显著。绝对收入和相对收入对中低收入群体幸福感的影响更大,绝对收入对高收入群体幸福感影响不显著。公共服务能够显著正向影响居民幸福感,且对低收入群体的影响... 中国综合社会调查数据统计结果显示,收入与幸福感的倒U型关系在统计意义上显著。绝对收入和相对收入对中低收入群体幸福感的影响更大,绝对收入对高收入群体幸福感影响不显著。公共服务能够显著正向影响居民幸福感,且对低收入群体的影响显著高于中高收入群体。公共服务满意度和获得感强化了收入对居民幸福感的正向影响,通过提高收入公平感和社会公平感缓冲了收入对居民幸福感的负面影响。因此,政府应在促进收入稳定增长的同时,维护收入分配的公平性,优化公共支出结构,促进基本公共服务均等供给,提升居民幸福感。 展开更多
关键词 居民幸福感 收入 公共服务 作用机理 实证分析
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传统套鞋的形制功能考析及造物思想释读
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作者 魏莉 刘纬桢 《丝绸》 CAS CSCD 2024年第4期137-148,共12页
“套鞋”是中国传统鞋履中实用与审美相结合的功能性样式,它们与人类的生产生活共生共存。本文以收藏家钟漫天先生提供的典型“套鞋”标本为主要研究模本,同时结合史料,针对性地对中国传统套鞋结构形制及其功能进行研究,并在其基础上对... “套鞋”是中国传统鞋履中实用与审美相结合的功能性样式,它们与人类的生产生活共生共存。本文以收藏家钟漫天先生提供的典型“套鞋”标本为主要研究模本,同时结合史料,针对性地对中国传统套鞋结构形制及其功能进行研究,并在其基础上对传统套鞋的造物思想进行探讨;强调考物与文献相结合而重考物的方法,对实物标本一手资料进行系统的信息采集,通过文献考证和实物结构的比较研究,力求展现中国传统套鞋的文化力量和个性风韵,为多元一体的中华文化特质提供一个生动的鞋履范式。 展开更多
关键词 传统套鞋 鞋履形制 功能鞋 制鞋工艺 造物思想 标本研究
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