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基于PLUS模型的长株潭都市圈景观生态风险动态分析

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地理与地理信息科学 2024年第1期40卷 47-54,98页

作者：邓晓辉王琳欧彩虹王文佳福州大学数字中国研究院(福建) 福建福州350003 福州大学环境与安全工程学院福建福州350116 福州大学地理与生态环境研究院福建福州350116 福州大学遥感信息工程研究院福建福州350116 福建省水土流失遥感监测评估与灾害防治重点实验室福建福州350116

基于土地利用数据和景观生态风险评价模型,分析2000—2020年长株潭都市圈景观生态风险时空演变特征,结合PLUS模型科学预测自然发展情景和生态保护情景下2030年长株潭都市圈的景观生态风险空间分布格局。结果表明:①2000—2020年长株潭... 详细信息

基于土地利用数据和景观生态风险评价模型,分析2000—2020年长株潭都市圈景观生态风险时空演变特征,结合PLUS模型科学预测自然发展情景和生态保护情景下2030年长株潭都市圈的景观生态风险空间分布格局。结果表明:①2000—2020年长株潭都市圈景观生态风险呈现北高南低、西高东低的空间分布特征,较低和中等生态风险区域总面积占比大于60%,生态风险加剧区域面积不到生态风险降低区域面积的1%,整体表现出高等级生态风险区向低等级生态风险区转移的特征;②研究区景观生态风险表现出较强的空间集聚特征,高—高集聚区主要分布在宁乡市、望城区、渌口区、雨花区和长沙县,低—低集聚区主要分布在研究区边界;③相比自然发展情景,生态保护情景下生态用地减少速率变缓,有助于缓解研究区生态风险,有利于构建和谐有序的生态安全格局。

关键词：景观生态风险 PLUS模型多情景模拟长株潭都市圈

Effects of V addition on the mechanical properties at elevated temperatures in a γ”-strengthened NiCoCr-based multi-component alloy

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journal of Materials Science & Technology 2022年第12期107卷 290-300页

作者： Yunwei Pan anping Dong Yang Zhou Dafan Du Donghong Wang Guoliang Zhu Baode Sun Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Lab of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240China

Ni Co Cr-based multi-component alloys have drawn much attention due to their exceptional ductility and strain hardening ***,insufficient strength-ductility synergy of NiCoCr alloy has always been an issue that prevents it from extensive *** to our previous research,the precipitation ofγ”phase can significantly improve the strength-ductility synergy of this alloy system at room *** this study,the effects of V addition onγ”phase stability and high-temperature mechanical properties have been explicitly *** results indicate that V addition can stabilize the metastableγ”phase in this alloy system and prevent it from transforming into a stableδphase at grain boundaries upon 650℃aging,resulting in improved mechanical properties at elevated *** specific strength ofγ”-strengthened multi-component NiCoCr-based alloy can reach up to 86.2 MPa gcmat 650℃,which is higher than those of Ni-based superalloys,IN 939 and *** work provides theoretical guidance for the novel design of γ”-strengthened alloy for high-temperature applications.

关键词： Multi-component alloys CALPHAD γ”phase Microstructural evolution High-temperature mechanical properties

Shedding light on neurons:optical approaches for neuromodulation

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National Science Review 2022年第10期9卷 34-54页

作者： Shan jiang Xiang Wu Nicholas j.Rommelfanger Zihao ou Guosong Hong Department of Materials Science and Engineering Stanford University Wu Tsai Neurosciences Institute Stanford University Department of Applied Physics Stanford University

Today’ s optical neuromodulation techniques are rapidly evolving,benefiting from advances in photonics,genetics and materials *** this review,we provide an up-to-date overview of the latest optical approaches for *** begin with the physical principles and constraints underlying the interaction between light and neural *** then present advances in optical neurotechnologies in seven modules:conventional optical fibers,multifunctional fibers,optical waveguides,light-emitting diodes,upconversion nanoparticles,optical neuromodulation based on the secondary effects of light,and unconventional light sources facilitated by ultrasound and magnetic *** conclude our review with an outlo ok on new methods and mechanisms that afford optical neuromodulation with minimal invasiveness and footprint.

关键词： optical neuromodulation optogenetics neural interfaces

古代战争知识图谱构建与应用——以宋元时期为例

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图书馆论坛 2024年第8期44卷 90-101页

作者：卢彤彤欧石燕李昕尉沈雪莹南京大学信息管理学院

文章旨在利用知识图谱的理念和技术对战争史文献资源进行语义化组织和描述,将非结构化战争文本转变为以事件、人物、时间和地点等多维信息数字化呈现的知识图谱,方便研究者进行更深层次的探索。文章采用Event Ontology构建战争本体语义... 详细信息

文章旨在利用知识图谱的理念和技术对战争史文献资源进行语义化组织和描述,将非结构化战争文本转变为以事件、人物、时间和地点等多维信息数字化呈现的知识图谱,方便研究者进行更深层次的探索。文章采用Event Ontology构建战争本体语义模型,基于模式匹配和预训练模型抽取战争事件涉及的人物、时间、地点等命名实体,利用Neo4j和Gephi存储、呈现和挖掘战争知识图谱;以战争事件为核心将分散的战争史资源整合起来,形成一个互联、立体、多维的知识图谱,使这些资源更容易被访问和利用。该本体没有关联同时期的政治、经济等内容,语义模型有待进一步优化。

关键词：事件本体宋元时期战争知识图谱

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基于CNN-BiLSTM的特高拱坝变形预测模型

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排灌机械工程学报 2024年第10期42卷 1031-1035,1043页

作者：欧斌张才溢傅蜀燕杨霖陈德辉杨石勇云南农业大学水利学院云南昆明650201 河海大学水文水资源与水利工程科学国家重点实验室江苏南京210098 云南省中小型水利工程智慧管养工程研究中心云南昆明650201

为提高特高拱坝的变形预测精度,提出了一种基于卷积神经网络(CNN)和双向长短期记忆网络(BiLSTM)的大坝变形预测模型.该模型利用CNN捕捉数据之间的空间关系,进行特征提取,再将其输入到BiLSTM中进行时间维度上的演变规律考虑.通过特征融... 详细信息

为提高特高拱坝的变形预测精度,提出了一种基于卷积神经网络(CNN)和双向长短期记忆网络(BiLSTM)的大坝变形预测模型.该模型利用CNN捕捉数据之间的空间关系,进行特征提取,再将其输入到BiLSTM中进行时间维度上的演变规律考虑.通过特征融合和全连接层的拼接,得到更丰富和综合的特征表示,最终映射到预测输出层进行拱坝变形预测.以某拱坝为例,验证了CNN-BiLSTM模型在RMSE等评价指标上具有高精度和稳定性,为混凝土拱坝结构的安全监测提供了新的思路.

关键词：混凝土拱坝卷积神经网络双向长短期记忆网络预测模型

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我的学术之路——区鉷教授访谈

广东外语外贸大学学报 2024年第5期35卷 13-23页

作者：雷艳妮区鉷中山大学外国语学院英语系

近日,中山大学教授、博士生导师区鉷老师就他的学术生涯和学科发展接受了中山大学雷艳妮副教授的访谈。在访谈中,区鉷教授详细阐述了他提出的“本土意识”理念的由来和核心内容。他也回忆了自己于1960年代在中山大学英语系就读本科、198... 详细信息

近日,中山大学教授、博士生导师区鉷老师就他的学术生涯和学科发展接受了中山大学雷艳妮副教授的访谈。在访谈中,区鉷教授详细阐述了他提出的“本土意识”理念的由来和核心内容。他也回忆了自己于1960年代在中山大学英语系就读本科、1980年代在中山大学就读硕士研究生和博士研究生,以及1988-1990年于剑桥大学在蒲龄恩先生指导下做博士后研究的情形。在访谈中,区鉷老师重点提及了影响他至深的众多师友。这些治学严谨,待人至诚的师友们共同推动了中国外国文学学科的发展。

关键词：区鉷戴镏龄本土意识加里·史奈德蒲龄恩英语语言文学中国外国文学学科

Soft Decision Based Gaussian-Laplacian Combination Model for Noisy Speech Enhancement

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Chinese journal of Electronics 2018年第4期27卷 827-834页

作者： ou Shifeng SONG Peng GAO Ying School of Science and Technology for Opto-electronic Information Yantai University School of Computer and Control Engineering Yantai University

One of the key issues of noisy speech enhancement technique is to achieve appropriate statistical distributions to model the clean speech and noise signals accurately. Most of the existing algorithms try to employ a sole model assumption in transform domain, which, however, has been proven to being contrary with the fact. To address this problem, the statistical properties of clean speech as well as several noise signals are analyzed using actual data in Discrete cosine transform(DCT) domain, and the study indicates the statistic of clean speech DCT coefficients tending to fall somewhere in between the Gaussian and Laplacian distribution. Based on the results,a novel speech enhancement algorithm is proposed using Gaussian-Laplacian combination model, whose core is employing a linear combination of Gaussian and Laplacian distribution to model the statistic of clean speech DCT coefficients. The corresponding weights of either distribution to the combination model are adaptively adjusted in terms of the probability of each hypothesis, which is estimated based on a soft decision technique by using Bayesian theorem. Through a number of objective and subjective tests,we compare the performance of the proposed algorithm with other recent model based approaches and have found that our algorithm is superior to the related approaches at all testing environments.

关键词： Speech enhancement Soft decision Speech distortion Combination model

Preparation and evaluation of bis(diallyl alkyl tertiary ammonium salt) polymer as a promising adsorbent for phosphorus removal

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journal of Environmental Sciences 2019年第12期31卷 24-37页

作者： Zhengchi Yang Lihua Liu Lu Zhao Gang Su Zuoxiao Wei anping Tang jianrong Xue School of Chemistry and Chemical Engineering Hunan University of Science and TechnologyXiangtan 411201China Key Laboratory of Theoretical Organic Chemistry and Function Molecule Ministry of EducationXiangtan 411201China Himan Prouincial Key Laboratory of Controllable Preparation and Fimctional Application of Fine Polymers Xiangtan 411201China Hunan Province College Key Laboratory of QSAR/QSPR Xiangtan 411201China

Problems associated with water eutrophication due to high phosphorus concentrations and related environmentally safe solutions have attracted wide attention.A novel bis(diallyl alkyl tertiary ammonium salt)polymer,particularly poly(N1,N1,N6,N6-tetraallylhexane-1,6-diammonium dichloride)(PTAHDADC),was synthesized and characterized by Fourier transform infrared spectroscopy,nuclear magnetic resonance,scanning electron microscopy,mercury intrusion method,and thermogravimetric *** adsorption characteristics in phosphorus were evaluated in dilute solution,and the recycling properties of PTAHDADC were *** showed that PTAHDADC possessed macropores with a size distribution ranging from 30 to 130μm concentrating at 63μm in diameter and had 46.52%of porosity,excellent thermal stability below 530 K,and *** could effectively remove phosphorus at p H=7–11 and had a removal efficiency exceeding 98.4%at pH=10–*** adsorption equilibrium data of PTAHDADC for phosphorus accorded well with the Langmuir and pseudo-second-order kinetic *** adsorption capacity was 52.82 mg/g at 293 *** adsorbed phosphorus rapidly and reached equilibrium within 90 *** activation energy Eawas 15.18 k j/*** presented an excellent recyclability with only 8.23%loss of removal efficiency after five adsorption–desorption *** morphology and structure of PTAHDADC slightly changed as evidenced by the pre-and post-adsorption of phosphorus,but the process was accompanied by the partial deprotonation of the(–CH2)3-NH+group of *** adsorption was a spontaneous exothermic process driven by entropy through physisorption,electrostatic attraction,and ion *** results showed that PTAHDADC was a highly efficient and fast-adsorbing phosphorus-removal material prospective in treating wastewater.

关键词： Bis(diallyl alkyl tertiary ammonium salt)polymer Phosphorus Adsorption thermodynamics Adsorption kinetics Removal mechanism

AN ECO- AND INNO-PRODUCT DESIGN SYSTEM APPLYING INTEGRATED AND INTELLIGENT QFDE AND TRIZ METHODOLOGY

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journal of Systems Science and Systems Engineering 2011年第4期20卷 443-459页

作者： Amy j.C. TRAPPEY jerry j.R. ou Gilbert Y.P. LIN Meng-Yu CHEN Department of Industrial Engineering and Engineering Management National Tsing Hua University Taiwan China Department of Industrial Engineering and Management National Taipei University of Technology Taiwan China Department of Business Administration Southern Taiwan University Taiwan China

The green environmental laws and regulations are legislated, implemented, and enforced in many countries and economic regions. The provision of green products and services are the fast growing trend in global consumer markets. Therefore, introducing new products with environmental considerations becomes critical for global brand manufacturers. This research depicts an integrated and intelligent eco- and inno-product design methodology to support environmental friendly green product development. The methodology adopts approaches, such as life cycle assessment （LCA）, quality function deploymnet for environement （QFDE）, theory of inventive problem solving （TRIZ） and back-propagation network （BPN） to achieve eco- and inno-design objectives. LCA evaluates and compares the environmental impacts of production. QFDE transforms high-level concerns of environment into design requirements. When there are many historical QFDE data, the BPN prediction model is trained and deployed to automate the specifications of green design improvement. TRIZ is to support the creation of innovative product design ideas effectively and efficiently during the concept design stage. Finally, this paper presents two eco-design cases of power adaptor to demonstrate the proposed methodology.