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Neural network modeling and prediction of HfO2 thin film properties tuned by thermal annealing

High Power Laser Science and Engineering 2024年第2期12卷 79-86页

作者： min gao Chaoyi Yin Jianda Shao Meiping Zhu School of Microelectronics Shanghai UniversityShanghaiChina Laboratory of Thin Film Optics Key Laboratory of Materials for High Power LaserShanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhouChina

Plasma-enhanced atomic layer deposition (PEALD) is gaining interest in thin films for laser applications, and post-annealing treatments are often used to improve thin film properties. However, research to improve thin film properties is often based on an expensive and time-consuming trial-and-error process. In this study, PEALD-HfO2 thin film samples were deposited and treated under different annealing atmospheres and temperatures. The samples were characterized in terms of their refractive indices, layer thicknesses and O/Hf ratios. The collected data were split into training and validation sets and fed to multiple back-propagation neural networks with different hidden layers to determine the best way to construct the process–performance relationship. The results showed that the three-hidden-layer back-propagation neural network (THL-BPNN) achieved stable and accurate fitting. For the refractive index, layer thickness and O/Hf ratio, the THL-BPNN model achieved accuracy values of 0.99, 0.94 and 0.94, respectively, on the training set and 0.99, 0.91 and 0.90, respectively, on the validation set. The THL-BPNN model was further used to predict the laser-induced damage threshold of PEALD-HfO2 thin films and the properties of the PEALD-SiO2 thin films, both showing high accuracy. This study not only provides quantitative guidance for the improvement of thin film properties but also proposes a general model that can be applied to predict the properties of different types of laser thin films, saving experimental costs for process optimization.

关键词： laser-induced damage threshold laser thin film neural network plasma-enhanced atomic layer deposition

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Optimal Configuration of Multitype Energy Storage for Integrated Energy Systems Considering System Reserve Value

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CSEE Journal of Power and Energy Systems 2024年第5期10卷 2114-2126页

作者： Xun Dou Jun Wang Zhenyuan Zhang min gao College of Electrical Engineering and Control Science Nanjing Tech UniversityNanjing 211816China Research Institute of NARI Technology Co. Ltd.Nanjing 211106China School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Falcon Computing Solutions 10880 Wilshire Blvd Suite 1132Los AngelesCA 90024USA

An integrated energy system(IES)contributes to improving energy efficiency and promoting sustainable energy *** different dynamic characteristics of the system,such as demand/response schemes and complex coupling characteristics among energy sources,siting and sizing of multitype energy storage(MES)are very important for the economic operation of the *** the effect of the diversity of the IES on system reserve based on electricity,gas and heat systems in different scenarios,a two-stage MES optimal configuration model,considering the system reserve value,is *** the first stage,to determine the location and charging/discharging strategies,a location choice model that minimizes the operating cost,considering the system reserve value,is *** the second stage,a capacity choice model,to minimize the investment and maintenance cost of the MES,is ***,an example is provided to verify the effectiveness of the MES configuration method in this paper in handling operational diversity and ensuring system *** with the configuration method that disregards the system reserve value,the results show that the MES configuration method proposed in this paper can reduce the annual investment cost and operating cost and improve the system reserve value.

关键词： Integrated energy system multitype energy storage optimal configuration renewable source system reserve value

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Asymptotic normality of error density estimator in stationary and explosive autoregressive models

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Applied Mathematics(A Journal of Chinese Universities) 2024年第1期39卷 140-158页

作者： WU Shi-peng YANG Wen-zhi gao min HU Shu-he School of Mathematical Sciences&School of Big Data and Statistics Anhui UniversityHefei 230601China School of Statistics Shanxi University of Finance and EconomicsTaiyuan030006China

In this paper,we consider the limit distribution of the error density function estima-tor in the rst-order autoregressive models with negatively associated and positively associated random *** mild regularity assumptions,some asymptotic normality results of the residual density estimator are obtained when the autoregressive models are stationary process and explosive *** order to illustrate these results,some simulations such as con dence intervals and mean integrated square errors are provided in this *** shows that the residual density estimator can replace the density\estimator"which contains errors.

关键词： explosive autoregressive models residual density estimator asymptotic distribution association sequence

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Architecture and exploration target areas of the Senegal Basin,West Africa

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Energy Geoscience 2024年第4期5卷 174-186页

作者： Naxin Tian gaokui Wu min gao Yue Gong Dapeng Wang Zhipeng Liu SINOPEC Exploration and Production Research Institute Beijing102206China

The recent discovery of large oil and gas fields in the deep-water of the Senegal Basin has drawn global *** this,several exploration wells in this area fail,which can be primarily contributed to a lack of understanding of the basin's structures and hydrocarbon accumulation *** study examines these characteristics utilizing gravity,seismic and drilling data,and finally makes a comparison with the Cote d’Ivoire Basin,a typical transform margin basin in the South *** results suggest that the Senegal Basin,influenced by multiple transform faults and a weak Paleozoic basement,experienced three evolutionary stages:rifting,transitional,and *** stage contributed to the development of distinct depositional sequences-syn-rift sequences,sag sequences,and continental margin sequences,*** Triassic-Early Jurassic rifting stage predominantly formed continental deposits,like fluvial,lacustrine,and deltaic deposits,in the syn-rift *** Middle-Late Jurassic transitional stage,influenced by transform faults,witnessed the formation of marginal ridges or submarine uplift *** zones,in conjunction with landward high terrains,formed a restricted environment promoting the development of source rocks in the sag *** the drifting stage,three types of reservoirs,namely platform carbonate rocks,deltas,and slope-floor fans were ***,large-scale hydrocarbon reservoirs have been found in the deltas and the slope-floor fans both in the Senegal Basin and the Cote d’Ivoire *** Upper Jurassic-Aptian platforms exhibit thick carbonate rocks and organic reefs on their edges,suggesting substantial potential for hydrocarbon exploration in the Senegal Basin.

关键词： Transform-extensional passive continental margin Basin architecture Accumulation model Senegal Basin West Africa

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Learn From Zhang Side to ‘Serve the People'

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中国新闻发布(英文版) 2024年第10期 62-65页

作者： Zhao Yaohong gao min the China Executive Leadership Academy in Yan’an the School of Marxism of the Northwestern Polytechnical University in Xi’an

In his report to the 20th National Congress of the Communist Party of China(CPC), President Xi Jinping emphasized the need to “carry forward the long line of inspiring principles for the Chinese Communists that originated with the great founding spirit of the Party; put resources related to the Party’s heritage to great use; conduct extensive public awareness activities to promote the core socialist values; enhance commitment to patriotism,collectivism and socialism; and foster a new generation of young people to shoulder the mission of realizing national rejuvenation.”

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Detecting compromised accounts caused by phone number recycling on e-commerce platforms: taking Meituan as an example

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Frontiers of Information Technology & Electronic Engineering 2024年第8期25卷 1077-1095页

作者： min gao Shutong CHEN Yangbo gao Zhenhua ZHANG Yu CHEN Yupeng LI Qiongzan YE Xin WANG Yang CHEN School of Computer Science Fudan UniversityShanghai 200438China Shanghai Key Lab of Intelligent Information Processing Fudan UniversityShanghai 200438China Meituan Beijing 100005China Department of Interactive Media Hong Kong Baptist UniversityHong Kong 999077China

Phone number recycling(PNR)refers to the event wherein a mobile operator collects a disconnected number and reassigns it to a new *** has posed a threat to the reliability of the existing authentication solution for e-commerce ***,a new owner of a reassigned number can access the application account with which the number is associated,and may perform fraudulent *** solutions that employ a reassigned number database from mobile operators are costly for e-commerce platforms with large-scale ***,alternative solutions that depend on only the information of the applications are *** this work,we study the problem of detecting accounts that have been compromised owing to the reassignment of phone *** analysis on Meituan's real-world dataset shows that compromised accounts have unique statistical features and temporal *** on the observations,we propose a novel model called temporal pattern and statistical feature fusion model(TSF)to tackle the problem,which integrates a temporal pattern encoder and a statistical feature encoder to capture behavioral evolutionary interaction and significant operation *** experiments on the Meituan and IEEE-CIS datasets show that TSF significantly outperforms the baselines,demonstrating its effectiveness in detecting compromised accounts due to reassigned numbers.

关键词： Phone number recycling Neural networks E-commerce Compromised account detection

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Development of Superhydrophobic Nano-SiO_(2)and Its Field Application in Low-permeability,High-temperature,and High-salinity Oil Reservoirs

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China Petroleum Processing & Petrochemical Technology 2024年第3期26卷 1-14页

作者： Qin Bing gao min Lei Xue Zhao Lin Zhu Qizhi Meng Fanbin Jiang Jianlin SINOPEC Research Institute of Petroleum Processing Co. LtdBeijing 100083China

In this study,to meet the stringent requirements on the hydrophobicity of nano-SiO_(2)particles for use in depressurization and enhanced injection operations in high-temperature and high-salinity oil reservoirs,secondary chemical grafting modification of nano-SiO_(2)is performed using a silane coupling agent to prepare superhydrophobic nano-SiO_(2) *** these superhydrophobic nano-SiO_(2)particles as the core agent,and liquid paraffin or diesel as the dispersion medium,a uniform dispersion of nano-SiO_(2)particles is achieved under high-speed stirring,and a chemically enhanced water injection system with colloidal stability that can be maintained for more than 60 d is successfully *** this system,a field test of depressurization and enhanced injection is carried out on six wells in an oilfield,and the daily oil production level is increased by 11 *** cumulative increased water injection is 58784 m^(3),the effective rate of the measures was 100%,and the average validity period is 661 d.

关键词： nano-SiO_(2)particle hydrophobic modification enhanced injection operation low-grade reservoir low permeability oilfield

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Frequency-dependent ferroelectric and electrocaloric properties in barium titanate-based ceramics based on Maxwell relations

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Journal of Advanced Dielectrics 2024年第2期14卷 54-62页

作者： Wanting Shu Hong Li Yanli Huang Cong Lin Xiao Wu min gao Tengfei Lin Chunlin Zhao College of Materials Science and Engineering Fuzhou University Fuzhou 350108P.R.China College of Photonic and Electronic Engineering Fujian Normal University Fuzhou 350117P.R.China

In this work,the frequency dependence of ferroelectric and electrocaloric properties in barium titanate-based ceramics was studied based on Maxwell *** is found that the maximum and remnant polarization will decrease while the coercive field increases a lot with rising frequency from 0.1 to 10 Hz,indicating that polarization rotation and domain switching become difficult at high *** electrocaloric properties show the different frequency dependence at different phase *** entropy change(ΔS)and adiabatic temperature change(ΔT)are similar around/above Curie temperature(TCT,showing tiny frequency ***,ΔS andΔT display the obvious frequency dependence below T_(C),especially in the orthorhombic–tetragonal phase-transition region with a stable ferroelectric phase,and this frequency dependence becomes more obvious under a low-electric *** is also found that increasing the frequency can weaken the electric field dependence of electrocaloric *** work gives a general profile of frequency dependence for electrocaloric properties in ferroelectric ceramics.

关键词： Electrocaloric properties ferroelectric ceramics barium titanate frequency dependence

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财税政策化解过剩产能:面临问题与总体思路

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税务研究 2024年第3期 76-83页

作者：高敏中辉期货有限公司

本文根据产能利用率、价格指数、企业盈利水平三类衡量指标的变化情况,认为我国当前存在一定的产能过剩问题。究其原因是需求收缩,即土地经济模式减速引发政府、企业、居民需求收缩,进而引发经济循环不畅。考虑到我国财税政策化解产能... 详细信息

本文根据产能利用率、价格指数、企业盈利水平三类衡量指标的变化情况,认为我国当前存在一定的产能过剩问题。究其原因是需求收缩,即土地经济模式减速引发政府、企业、居民需求收缩,进而引发经济循环不畅。考虑到我国财税政策化解产能过剩面临的新问题,建议我国今后应实施更加积极的财税政策,着力稳住基本建设需求;加强财税政策对债务风险化解的支持,保护经营主体;持续实施减税降费政策,引导过剩行业转型升级;谋划新一轮财税体制改革,形成扩大内需的长效机制。

关键词：产能过剩财税政策需求收缩扩大内需

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新入职教师教学模仿的实施与挑战应对

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教学与管理 2024年第22期 24-28页

作者：高敏曲阜师范大学教育学院山东曲阜273100

教学模仿是指新入职教师在教育教学中能动地针对他者优秀教学行为所进行的观摩、借鉴、外显、内化和创新等一系列教学活动。借助教学模仿这一途径,新入职教师可以快速地适应职场、提升专业能力,融入“专业共同体”。然而,当下不少新入... 详细信息

教学模仿是指新入职教师在教育教学中能动地针对他者优秀教学行为所进行的观摩、借鉴、外显、内化和创新等一系列教学活动。借助教学模仿这一途径,新入职教师可以快速地适应职场、提升专业能力,融入“专业共同体”。然而,当下不少新入职教师教学模仿依然在模仿意向确立、模仿对象(内容)选取、模仿状态以及模仿反思等方面面临着不小的挑战。对此,新入职教师为了实现教学模仿效益的最大化,必须自觉内化教学模仿意向,秉持因需模仿的行动取向、注重教学模仿的过程反思以及最终回归建构自主教学风格的原点,协同推进教学模仿的进程。

关键词：教学模仿新入职教师课堂教学教学过程

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