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All-optical complex field imaging using diffractive processors

Light(Science & Applications) 2024年第6期13卷 1122-1139页

作者： Jingxi Li Yuhang Li Tianyi gan Che-Yung Shen Mona Jarrahi Aydogan Ozcan Electrical and Computer Engineering Department University of CaliforniaLos AngelesCA90095USA Bioengineering Department University of CaliforniaLos AngelesCA90095USA California NanoSystems Institute(CNSI) University of CaliforniaLos AngelesCA90095USA

Complex field imaging,which captures both the amplitude and phase information of input optical fields or objects,can offer rich structural insights into samples,such as their absorption and refractive index ***,conventional image sensors are intensity-based and inherently lack the capability to directly measure the phase distribution of a *** limitation can be overcome using interferometric or holographic methods,often supplemented by iterative phase retrieval algorithms,leading to a considerable increase in hardware complexity and computational ***,we present a complex field imager design that enables snapshot imaging of both the amplitude and quantitative phase information of input fields using an intensity-based sensor array without any digital *** design utilizes successive deep learning-optimized diffractive surfaces that are structured to collectively modulate the input complex field,forming two independent imaging channels that perform amplitude-to-amplitude and phase-to-intensity transformations between the input and output planes within a compact optical design,axially spanning~100 *** intensity distributions of the output fields at these two channels on the sensor plane directly correspond to the amplitude and quantitative phase profiles of the input complex field,eliminating the need for any digital image reconstruction *** experimentally validated the efficacy of our complex field diffractive imager designs through 3D-printed prototypes operating at the terahertz spectrum,with the output amplitude and phase channel images closely aligning with our numerical *** envision that this complex field imager will have various applications in security,biomedical imaging,sensing and material science,among others.

关键词： field. utilize collective

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生命周期效应、CEO权力与内部控制质量——基于家族上市公司的经验证据

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会计研究 2018年第3期 64-70页

作者：胡明霞干胜道西南政法大学中国法治企业研究院 401120 四川大学商学院 610064

本文从企业生命周期角度出发,发现成长期家族企业内部控制质量较高,非成长期的家族企业内部控制质量较低。在成长期,结构权力和专家权力与内部控制质量显著正相关,所有权权力与内部控制质量显著负相关。非成长期,专家权力和所有权权力... 详细信息

本文从企业生命周期角度出发,发现成长期家族企业内部控制质量较高,非成长期的家族企业内部控制质量较低。在成长期,结构权力和专家权力与内部控制质量显著正相关,所有权权力与内部控制质量显著负相关。非成长期,专家权力和所有权权力与内部控制质量显著负相关。进一步研究发现,实际控制人任CEO以及与实际控制人亲缘关系越强的家族成员任CEO会导致较低的内部控制质量,·且较强的亲缘关系会增加所有权权力对内部控制质量的抑制作用。

关键词：生命周期 CEO权力内部控制质量亲缘

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政府补贴、地方经济波动与实体企业金融化

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重庆大学学报（社会科学版） 2020年第5期26卷 14-29页

作者：陈冉黄送钦干胜道四川大学商学院四川成都610064 清华大学社会科学学院北京100084

基于如何防范和化解系统性金融风险视角,以2008—2015年A股非金融类上市公司为样本,文章考察了作为一项政策工具的政府补贴对企业金融化的影响,同时还考虑了地方经济波动对政府补贴与企业金融化间关系的影响。研究发现:政府补贴降低了... 详细信息

基于如何防范和化解系统性金融风险视角,以2008—2015年A股非金融类上市公司为样本,文章考察了作为一项政策工具的政府补贴对企业金融化的影响,同时还考虑了地方经济波动对政府补贴与企业金融化间关系的影响。研究发现:政府补贴降低了企业的金融化参与程度,且相对于市场化高地区的企业,这种影响在市场化低地区的企业中显得更强。同时还发现,随着地方经济波动增加,地方政绩诉求实现难度加大,此时政府补贴对企业金融化的负向影响被削弱,但这种现象仅在市场化低的地区企业中存在,在市场化高的地区企业中不存在。此外,文章基于工具变量法、聚类分析和变量替换等一系列检验进一步说明研究结论的稳健性。文章在拓展和丰富政府补贴和企业金融化研究视角的同时,不仅以政府补贴为载体成功地将政府主体纳入实业金融化的理论分析框架中,而且对当前政府出台防范化解系统性金融风险、经济“高质量发展”和实体企业“虚转实”的政策有重要参考意义。

关键词：政府补贴地方经济波动金融化融资约束政府干预

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A novel method for the green utilization of waste fried oil

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Particuology 2024年第1期84卷 1-11页

作者： gan Cheng Mengni Zhang Yang Lu Yanhui Zhang Bin Lin Ee Von Lau College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo454003China Henan Key Laboratory for Green and Efficient Mining&Comprehensive Utilization of Mineral Resources Henan Polytechnic UniversityJiaozuo454003China Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization Henan Polytechnic UniversityJiaozuo454003China School of Engineering Monash University MalaysiaSubang JayaSelangor47500Malaysia

Waste fried oil was studied to prepare three different types of detergent such as soap,liquid soap and soap powder via saponification *** preparation conditions of soap base were optimized by orthogonal *** specific preparation processes included waste fried oil treatment,orange peel extract preparation,saponification,demoulding and *** showed that the optimal con-ditions for saponification were as follows:ratio of pure waste fried oil to coconut oil=6∶4,alkali liquor(NaOH)mass fraction 30%,saponification temperature 70℃,orange peel extract concentration 15%.The mature soap was then used to make liquid soap and soap powder by surfactant(sodium dodecylbenzene sulfonate,coconut diethanol amide)addition,followed by *** prepared detergent conforms to the production standard of strong decontamination ability,possesses stable performance,is gentle to skin and non-toxic.

关键词： Waste fried oil Detergent Saponification Decolorization

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财务宽裕会助推并购吗

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财经科学 2021年第2期 15-29页

作者：干胜道刘佳敏四川大学商学院

并购作为上市公司对外扩张的一种主要方式,一直都受到了学术界和实务界的广泛关注。本文选取的样本为2009-2018年我国A股财务宽裕上市公司,试图探索财务宽裕程度对并购行为会产生何种影响。研究结果表明:财务宽裕与并购行为呈显著负向... 详细信息

并购作为上市公司对外扩张的一种主要方式,一直都受到了学术界和实务界的广泛关注。本文选取的样本为2009-2018年我国A股财务宽裕上市公司,试图探索财务宽裕程度对并购行为会产生何种影响。研究结果表明:财务宽裕与并购行为呈显著负向关系。其中,财务宽裕程度越高,公司并购金额越少、并购频率越低,但是财务宽裕与并购类型的选择没有显著相关性。进一步发现,高管持股会加强财务宽裕对并购行为的抑制作用;并且,相比于产品市场竞争激烈的公司,产品市场集中度高的财务宽裕公司对并购行为的抑制作用更明显。同时考虑高管持股和产品市场竞争的机制后发现,在产品市场集中度高的行业中,高管持股对财务宽裕公司的并购行为具有更明显的负向影响。

关键词：财务宽裕并购高管持股产品市场竞争

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Eco-physiological characteristics of Tetracentron sinense *** in response to different light intensities

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Journal of Forestry Research 2024年第3期35卷 29-44页

作者： Rong Wang Xueheng Lu Hongyan Han Xuemei Zhang Yonghong Ma Qinsong Liu Xiaohong gan Key Laboratoryof Southwest Wildlife Resources Conservation Ministry of EducationChina West Normal UniversityNanchong 637009People's Republic of China Institute of Plant Adaptation and Utilization in Southwest Mountain China West Normal UniversityNanchong 637009People's Republic of China Office of the People's Government of Yuexi County Yuexi County 616650Liangshan Yi Autonomous PrefecturePeople's Republic of China

The regeneration of Tetracentron sinense *** poor in the understory and in open areas due to the charac-teristics of natural regeneration of the species on forest edges and in *** is unclear whether different light intensities in various habitats affect eco-physiological characteristics of saplings and their natural *** this study,the light intensity in *** habitats was simulated by artificial shading(L1:100%NS(natural sunlight)in the open;L2:50%NS in a forest gap or edge;L3:10%NS in understory)to investigate differences in morphology,leaf structure,physiology,and photosynthesis of 2-year-old sap-lings,and to analyze the mechanism of light intensity on sapling *** differences were observed in morphology(including leaf area,and specific leaf area)under different light *** to L1 and L3,chloroplast structure in L2 was *** increasing time,superoxide dismutase(SOD)and catalase(CAT)activities in L2 became gradually higher than under the other light intensities,while malondialdehyde(MDA)content was *** decreased osmoregulation substance contents of leaves but increased *** results suggest that light intensities significantly affect the eco-physiological characteristics of *** saplings and they would respond most favorably at intermediate levels of light by optimizing eco-physiological ***,50%natural sunlight should be created to promote saplings establishment and population recovery of *** during in situ conservation,including sowing mature seeds in forest edges or gaps and providing appropriate shade protection for seedlings and saplings in the open.

关键词： Chloroplast ultrastructure Eco-physiological characteristics Light intensities Sapling establishment Tetracentron sinense Oliv

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自由现金流理论研究综述:发展与应用

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经济与管理研究 2006年第12期27卷 5-10页

作者：符蓉黄激动干胜道四川大学工商管理学院四川师范大学

自由现金流(Free cash Flow,以下简称FCF)理论是西方在20世纪80年代中后期提出的现代财务核心理论之一。FCF理论突破了原有的财务理论体系,积累了丰富的研究文献,并带动了公司治理结构、控制权分配、业绩评价和经理人激励等理论与实践... 详细信息

自由现金流(Free cash Flow,以下简称FCF)理论是西方在20世纪80年代中后期提出的现代财务核心理论之一。FCF理论突破了原有的财务理论体系,积累了丰富的研究文献,并带动了公司治理结构、控制权分配、业绩评价和经理人激励等理论与实践的发展。本文对FCF理论的研究成果进行了梳理,以期对FCF理论在中国的后续研究作铺垫。

关键词：自由现金流量代理成本控制效应过度投资

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Numerical Simulation of the Mass Movement Process of the 2018 Sedongpu Glacial Debris Flow by Using the Fluid-Solid Coupling Method

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Journal of Earth Science 2024年第2期35卷 583-596页

作者： Xing-Yu Long Yu-Xiang Hu Bin-Rui gan Jia-Wen Zhou State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan UniversityChengdu610065China College of Water Resource and Hydropower Sichuan UniversityChengdu610065China

In the context of global warming and intensified human activities,glacier instability in plateau regions has increased,and glacier debris flows have become active,which poses a significant threat to the lives and property of people and socioeconomic *** mass movement process of glacier debris flows is extremely complex,so this paper uses the 2018 Sedongpu glacier debris flow event on the Qinghai-Tibet Plateau as an example and applies a numerical simulation method to invert the whole process of mass *** view of the interaction between phases in the process of motion,we use the fluid-solid coupling method to describe the mass *** granular-flow model and drift-flux model are employed in FLOW3D software to study the mass movement process of glacier debris flows and explore their dynamic *** results indicate that the glacier debris flow lasted for 700 s,and the movement process was roughly divided into four stages,including initiation,scraping,surging and deposition;the depositional characteristics calculated by the fluid-solid coupling model are consistent with the actual survey results and have good reliability;strong erosion occurs during the mass movement,the clear volume amplification effect,and the first wave climbs 17.8 m across the *** fluid-solid coupling method can better simulate glacier debris flows in plateau regions,which is helpful for the study of the mechanism and dynamic characteristics of such disasters.

关键词： glacial debris flow Qinghai-Tibet Plateau fluid-solid coupling FLOW3D mass movement depositional characteristics disasters engineering geology

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CNN-LSTM based incremental attention mechanism enabled phase-space reconstruction for chaotic time series prediction

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Journal of Electronic Science and Technology 2024年第2期22卷 77-90页

作者： Xiao-Qian Lu Jun Tian Qiang Liao Zheng-Wu Xu Lu gan Bidding and Purchasing Center University of Electronic Science and Technology of ChinaChengdu611731China Yibin Research Institute University of Electronic Science and Technology of ChinaYibin644000China School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu611731China

To improve the prediction accuracy of chaotic time series and reconstruct a more reasonable phase space structure of the prediction network,we propose a convolutional neural network-long short-term memory(CNN-LSTM)prediction model based on the incremental attention ***,a traversal search is conducted through the traversal layer for finite parameters in the phase ***,an incremental attention layer is utilized for parameter judgment based on the dimension weight criteria(DWC).The phase space parameters that best meet DWC are selected and fed into the input ***,the constructed CNN-LSTM network extracts spatio-temporal features and provides the final prediction *** model is verified using Logistic,Lorenz,and sunspot chaotic time series,and the performance is compared from the two dimensions of prediction accuracy and network phase space ***,the CNN-LSTM network based on incremental attention is compared with long short-term memory(LSTM),convolutional neural network(CNN),recurrent neural network(RNN),and support vector regression(SVR)for prediction *** experiment results indicate that the proposed composite network model possesses enhanced capability in extracting temporal features and achieves higher prediction ***,the algorithm to estimate the phase space parameter is compared with the traditional CAO,false nearest neighbor,and C-C,three typical methods for determining the chaotic phase space *** experiments reveal that the phase space parameter estimation algorithm based on the incremental attention mechanism is superior in prediction accuracy compared with the traditional phase space reconstruction method in five networks,including CNN-LSTM,LSTM,CNN,RNN,and SVR.

关键词： Chaotic time series Incremental attention mechanism Phase-space reconstruction

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Quantum Spin Exchange Interactions to Accelerate the Redox Kinetics in Li–S Batteries

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Nano-Micro Letters 2024年第5期16卷 370-383页

作者： Yu Du Weijie Chen Yu Wang Yue Yu Kai Guo gan Qu Jianan Zhang Key Laboratory of Advanced Energy Catalytic and Functional Materials Preparation of Zhengzhou City College of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001People’s Republic of China

Spin-engineering with electrocatalysts have been exploited to suppress the“shuttle effect”in Li–S *** selec-tion,spin-dependent electron mobility and spin potentials in activation barriers can be optimized as quantum spin exchange interactions lead-ing to a significant reduction of the electronic repulsions in the orbitals of ***,we anchor the MgPc molecules on fluorinated carbon nanotubes(MgPc@FCNT),which exhibits the single active Mg sites with axial *** to the density functional theory calculations,the electronic spin polarization in MgPc@FCNT not only increases the adsorption energy toward LiPSs intermediates but also facilitates the tunneling process of electron in Li–S *** a result,the MgPc@FCNT provides an initial capacity of 6.1 mAh cm^(-2) even when the high sulfur loading is 4.5 mg cm^(-2),and still maintains 5.1 mAh cm^(-2) after 100 *** work provides a new perspective to extend the main group single-atom catalysts enabling high-performance Li–S batteries.

关键词： Metal phthalocyanines Spin polarization Electrocatalysis Li–S batteries

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