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Recent Advance in Synaptic Plasticity Modulation Techniques for Neuromorphic Applications

Nano-Micro Letters 2024年第10期16卷 403-434页

作者： Yilin Sun Huaipeng Wang dan xie School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijing 100081People's Republic of China School of Integrated Circuits Beijing National Research Center for Information Science and Technology(BNRist)Tsinghua UniversityBeijing 100084People's Republic of China

Manipulating the expression of synaptic plasticity of neuromorphic devices provides fascinating opportunities to develop hardware platforms for artifi-cial ***,great efforts have been devoted to exploring biomimetic mechanisms of plasticity simulation in the last few *** progress in various plasticity modulation techniques has pushed the research of synaptic electronics from static plasticity simulation to dynamic plasticity modulation,improving the accuracy of neuromorphic computing and providing strategies for implementing neuromorphic sensing ***,several fascinating strategies for synap-tic plasticity modulation through chemical techniques,device structure design,and physical signal sensing are *** chemical techniques,the underly-ing mechanisms for the modification of functional materials were clarified and its effect on the expression of synaptic plasticity was also *** on device structure design,the reconfigurable operation of neuromorphic devices was well demonstrated to achieve programmable neuromorphic ***,integrating the sensory units with neuromorphic processing circuits paved a new way to achieve human-like intelligent perception under the modulation of physical signals such as light,strain,and ***,considering that the relevant technology is still in the basic exploration stage,some prospects or development suggestions are put forward to promote the development of neuromorphic devices.

关键词： Plasticity modulation Dynamic plasticity Chemical techniques Programmable operation Neuromorphic sensing

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Global interpolating meshless shape function based on generalized moving least-square for structural dynamic analysis

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Applied Mathematics and Mechanics(English Edition) 2016年第9期37卷 1153-1176页

作者： dan xie Kailin JIAN Weibin WEN College of Aerospace Engineering Chongqing University State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University College of Engineering Peking University

A global interpolating meshless shape function based on the generalized moving least-square （GMLS） is formulated by the transformation technique. Both the shape function and its derivatives meet the Kronecker delta function property. With the interpolating GMLS （IGMLS） shape function, an improved element-free Galerkin （EFG） method is proposed for the structural dynamic analysis. Compared with the conven- tional EFG method, the obvious advantage of the proposed method is that the essential boundary conditions including both displacements and derivatives can be imposed by the straightforward way. Meanwhile, it can greatly improve the ill-condition feature of the standard GMLS approximation, and provide good accuracy at low cost. The dynamic analyses of the Euler beam and Kirchhoff plate are performed to demonstrate the feasi- bility and effectiveness of the improved method. The comparison between the numerical results of the conventional method and the improved method shows that the proposed method has better stability, higher accuracy, and less time consumption.

关键词： structural dynamics meshless method element-free Galerkin (EFG)method generalized moving least-square (GMLS)

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高寒森林硝酸盐氮氧同位素沿水文路径的分布

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中国环境科学 2025年第2期45卷 935-942页

作者：韩怡蒙周剑兴夏凡李秉珍谢丹妮长安大学土地工程学院陕西西安710054

为深入了解青藏高原东北部高寒森林小流域的氮循环过程,2022年4~9月,以青藏高原河湟谷地大通和湟源两处高寒森林站点的穿透水、土壤水和地表径流为研究对象,监测其可溶性无机氮(DIN)的浓度和通量,并利用稳定同位素技术分析硝酸盐(NO_(3)... 详细信息

为深入了解青藏高原东北部高寒森林小流域的氮循环过程,2022年4~9月,以青藏高原河湟谷地大通和湟源两处高寒森林站点的穿透水、土壤水和地表径流为研究对象,监测其可溶性无机氮(DIN)的浓度和通量,并利用稳定同位素技术分析硝酸盐(NO_(3)^(-))的氮氧(N、O)同位素沿水文路径(穿透水-土壤水-地表径流)的分布特征.结果表明,大通和湟源高寒森林的平均氮沉降(3.60kg/(hm^(2)·a))高于青藏高原地区的平均氮沉降(2.94kg/(hm^(2)·a)),并且湟源高寒森林氮沉降(4.17kg/(hm^(2)·a))高于大通高寒森林氮沉降(3.02kg/(hm^(2)·a)).两处高寒森林小流域土壤水中NO_(3)^(-)的平均浓度为5.78mg/L,其δ^(18)O-NO_(3)^(-)平均值((-1.54±9.77)‰)低于穿透水中δ^(18)O-NO_(3)^(-)的平均值((74.2±0.01)‰),表明高寒森林土壤中发生了硝化作用.利用端元混合模型计算发现土壤的硝化作用贡献了土壤水中90%以上的NO_(3)^(-),其余约10%则来源于大气沉降.两处高寒森林地表径流中NO_(3)^(-)的平均浓度为5.73mg/L,其δ^(18)O-NO_(3)^(-)和δ^(15)N-NO_(3)^(-)沿1:2的增长趋势富集,表明地表径流中存在反硝化过程.青藏高原高寒森林中的δ^(15)N-NO_(3)^(-)和δ^(18)O-NO_(3)^(-)沿穿透水-土壤水-地表径流均呈现先减小后增大的趋势.

关键词：青藏高原氮沉降硝酸盐氮氧同位素高寒森林

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Variational quantum algorithms for scanning the complex spectrum of non-Hermitian systems

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Frontiers of physics 2024年第4期19卷 275-285页

作者： Xu-dan xie Zheng-Yuan Xue dan-Bo Zhang Key Laboratory of Atomic and Subatomic Structure and Quantum Control(Ministry of Education) Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matterand School of PhysicsSouth China Normal UniversityGuangzhou 510006China Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials Guangdong–Hong Kong Joint Laboratory of Quantum Matterand Frontier Research Institute for PhysicsSouth China Normal UniversityGuangzhou 510006China

Solving non-Hermitian quantum many-body systems on a quantum computer by minimizing the variational energy is challenging as the energy can be ***,we propose a variational quantum algorithm for solving the non-Hermitian Hamiltonian by minimizing a type of energy variance,where zero variance can naturally determine the eigenvalues and the associated left and right ***,the energy is set as a parameter in the cost function and can be tuned to scan the whole spectrum efficiently by using a two-step optimization *** numerical simulations,we demonstrate the algorithm for preparing the left and right eigenstates,verifying the biorthogonal relations,as well as evaluating the *** also investigate the impact of quantum noise on our algorithm and show that its performance can be largely improved using error mitigation ***,our work suggests an avenue for solving non-Hermitian quantum many-body systems with variational quantum algorithms on near-term noisy quantum computers.

关键词： quantum algorithm non-Hermitian physics quantum manybody systems

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Living Copolymerization of EOVE and MOVE:Fast Flow Synthesis and Thermal Responsive Behavior

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Chinese Journal of Polymer Science 2022年第10期40卷 1193-1200,I0008页

作者： Yu-Hang He dan xie Yang-Cheng Lu State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBejing 100084China

Random and block copolymers of 2-methoxyethyl vinyl ether(MOVE)and 2-ethoxyethyl vinyl ether(EOVE)were synthesized within 180 s via IBVE-HCl/SnCl_(4) initiating system in the presence of THF in a microflow *** polymers can be produced continuously and efficiently with extremely narrow molecular weight distributions(M_(w)/M_(n)=1.09-1.18)even at the existence of pendant oxyethylene units Polymerization rate can be accelerated by reducing THF to very low concentration([THF]=50 mmol/L),reaching conversions over 60%and 70%in 60 s for EOVE and MOVE,*** copolymers poly(MOVE_(100x)-r-EOVE(_(100)(1-x)))(x=0.25,0.5,0.75)experienced very sensitive phase separation process,of which phase separation temperature(T_(ps))can be adjusted between 20 and 70℃by controlling monomer *** the other hand,thermally induced phase separation of diblock copolymers poly(MOVE_(100)-b-EOVE_(100))was not so sensitive as its random copolymer *** bigger difference between phase separation temperatures of heating and cooling process(ΔT_(ps))was found for diblock copolymer.

关键词： Living cationic polymerization Stimuli-responsive Microflow system

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杨梅核仁油的提取、营养价值及其加工副产物利用进展

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中国油脂 2025年第2期50卷 29-33页

作者：杨云云谢丹罗静茹朱西平韩露谢亮亮郑立友王小贵安徽工程大学生物与食品工程学院安徽芜湖241000 台州科技职业学院农业与生物工程学院浙江台州318000 浙江夏至梅生物科技有限公司浙江台州317312

旨在为杨梅核仁的深加工与高效利用提供参考,综述了近几年国内外有关杨梅核仁油的提取方法、营养成分、健康效用及其加工副产物综合利用的研究进展,并展望了杨梅核仁油的应用前景。杨梅核仁油的提取方法包括有机溶剂萃取法、超临界CO_(2... 详细信息

旨在为杨梅核仁的深加工与高效利用提供参考,综述了近几年国内外有关杨梅核仁油的提取方法、营养成分、健康效用及其加工副产物综合利用的研究进展,并展望了杨梅核仁油的应用前景。杨梅核仁油的提取方法包括有机溶剂萃取法、超临界CO_(2)萃取法、水酶法以及超声波/微波辅助提取法;杨梅核仁油营养价值较高,富含不饱和脂肪酸和维生素E、磷脂以及酚类等生物活性物质,具有抗氧化活性和降血脂的功效;杨梅核仁脱脂粕可以提取植物蛋白、苦杏仁苷以及酚类物质等有益成分。未来杨梅核仁油可以在食品、保健品以及化妆品中广泛应用。

关键词：杨梅核仁油提取工艺营养成分降血脂

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基于自然语言处理(NLP)的生态环境准入清单政策内容分析

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环境工程技术学报 2025年第1期15卷 1-10页

作者：魏泽洋汪自书宫曼莉谢丹杨洋刘毅清华大学环境学院内蒙古财经大学资源与环境经济学院

生态环境准入清单是生态环境分区管控制度的核心抓手,通过空间布局约束、污染排放管控、环境风险防控和资源能源利用效率控制等维度实现生态环境源头预防。生态环境准入清单存在政策文本庞大、管控措施多样、表达构成复杂特点,识别准入... 详细信息

生态环境准入清单是生态环境分区管控制度的核心抓手,通过空间布局约束、污染排放管控、环境风险防控和资源能源利用效率控制等维度实现生态环境源头预防。生态环境准入清单存在政策文本庞大、管控措施多样、表达构成复杂特点,识别准入清单管控的对象、方式与力度是支撑生态环境分区管控政策实施的重要基础。本研究基于自然语言机器无监督学习技术对生态环境准入清单进行政策词汇模式挖掘并对政策文本设定多维定量化标签,应用自然语言深度学习模型对生态环境准入清单管控措施进行文本分类评估。河北省是我国产业门类最齐全、资源环境问题最复杂的省份之一,其生态环境准入管控具有典型性和代表性。以河北省生态环境准入清单的产业管控措施为例,识别了10类政策关键词特征、64项主要政策关键词,对全清单中对应关键词所在的语句覆盖率达95%;构造了24个管控措施-行业的分类标签,应用并比较了BERT、RoBERTa和ALBERT深度学习模型对政策文本的分类识别效果,预测精度、召回率和F1得分最高分别可达到0.95、0.79和0.86,训练模型可较好地识别准入清单政策内容。结果显示河北省准入清单在管控措施明确化、具体化、定量化方面仍存在不足,产业精细化管控、考核指标型以及时限型内容有待补充和细化。本研究提出的方法具有较好的适用前景,建议在此基础上结合前沿人工智能方法,进一步提高模型自动处理效率、动态分析以及提供精细化政策调整建议的能力。

关键词：生态环境分区管控生态环境准入清单政策文本自然语言处理(NLP)

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Discovery of Radiolaria from the Zongzhuo Formation in Tianba,Kangmar,Tibet and its Age Implication

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Acta Geologica Sinica(English Edition) 2009年第5期83卷 853-859页

作者： LI Guobiao xie dan WAN Xiaoqiao HAN Hongdou CHEN Puli China University of Geosciences Beijing 100083 China

There is a group of variegated marine deposits, including the red beds widespread in the area of Tianba, Kangmar, southern Tibet, which previous works have contributed to Cretaceous Zongzhuo Formation by lithologic associations only, but with poor fossil evidence. Due to the absence of age dating fossils, the red bed age is obscure. Abundant Cretaceous radiolaria were discovered from the Zongzhuo Formation in the present study. In spite of the poor general preservation of some radiolarian specimens as recrystallized quartz infillings, 58 species from 46 genera of radiolaria, extracted from chert and silicous limestone of the Zongzhuo Formation in Kangmar, were identified on the basis of their shape and ornamentation. Based on the radiolaria, the age of the Zongzhuo Formation of this area has been referred to as Late Cretaceous. The new radiolarian data from the Zongzhuo Formation of Tianba area provide a local basis to correlate these deposits with other regions of the Tethyan Himalaya.

关键词： red bed radiolaria late Cretaceous Zongzhuo Formation Kangmar

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Effectiveness of entomopathogenic fungal strains against poplar/willow weevil(Cryptorhynchus lapathi L.)larvae

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Journal of Forestry Research 2022年第5期33卷 1691-1702页

作者： Fang Niu Ya Xing Niya Jia Kai Ding dan xie Huanwen Chen Defu Chi Key Laboratory for Sustainable Forest Ecosyst Management of Ministry of Education College of ForestryNortheast Forestry UniversityHarbin 150040HeilongjiangPeople’s Republic of China

The poplar and willow weevil,Crypto rhynchus lapathi L.,a major universally destructive wood-boring insect has become one of the important quarantine pests that is extremely destructive to forestry development and needs to be *** fungi(EPF) are considered safe and friendly for humans and the environment and play important roles in controlling insect pest *** this study,the screening of entomopathogenic fungi for control of *** is reported through the evaluation of virulence of four fungal Beauveria bassiana(CFCC81428,CFCC83116,CFCC83486,CFCC87297)strains,one ***(CFCC83487) strain and one Metarhizium anisopliae(CFCC88953) *** virulence of the different strains was appraised by correct mortality rate,cumulative mortality rate,median lethal concentration(LC_(50)) and median lethal time(LT_(50)).*** strains CFCC81428 and CFCC83116 were the most virulent among the six strains with a mortality up to 100%,and the LT_(50) were 2.7 and 3.1 *** conidia concentrations of three strains(CFCC81428,CFCC83116 and CFCC87298) that caused high virulence was screened for *** effect on controlling *** larvae were also determined under field condition by brushing conidia suspensions on *** larvae infested in a poplar *** cumulative rate in the field was lower than those obtained from the laboratory,but the order of the virulence of different strains did not *** in all three strains occurred at their highest concentration(1.0 × 10^(8) conidia mL^(-1)).Under field conditions,the CFCC81428 strain was the most effective,causing mortalities of 80.3% and 75.2%in two plots in Beipiao and Lindian counties,respectively,followed by CFCC83116(69.1%,66.6%) and CFCC87298(60.7%,59.3%).Based on our results,the *** strain CFCC81428 has the potential as a biological insecticide to control *** larvae.

关键词： Entomopathogenic fungi Pathogenicity Biocontrol control Beauveria bassiana Cryptorhynchus lapathi

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酱香型白酒一轮次糟醅微生物群落结构及溯源分析

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食品科学 2025年第4期46卷 117-125页

作者：朱安然汪地强胡建锋吴成谢丹黄河鸥杨军林胡峰路虎李傲贵州习酒股份有限公司贵州习水564600

为探究酱香型白酒一轮次堆积和窖池发酵过程糟醅微生物群落结构组成与理化指标的相关性及微生物来源,基于传统可培养方法与Illumina MiSeq测序平台对糟醅、酿造环境微生物群落结构组成及演替规律开展研究,并分析其与理化因子的关联作用... 详细信息

为探究酱香型白酒一轮次堆积和窖池发酵过程糟醅微生物群落结构组成与理化指标的相关性及微生物来源,基于传统可培养方法与Illumina MiSeq测序平台对糟醅、酿造环境微生物群落结构组成及演替规律开展研究,并分析其与理化因子的关联作用,进一步采用Source Tracker软件解析糟醅优势微生物的来源和比例。结果表明:一轮次堆积发酵6 d糟醅中细菌和酵母菌的菌落总数达到最大值,分别为(3.45±0.15)×10^(6) CFU/g和(40.5±2.50)×10^(4) CFU/g;堆积发酵6 d后未被分类的乳杆菌科细菌(unclassified_Lactobacillaceae,91.23%~91.77%)和毕赤酵母属(Pichia,32.84%~91.00%)为绝对的优势细菌和真菌属,其中unclassified_Lactobacillaceae与糟醅水分含量和酸度呈显著正相关,Pichia与糟醅水分含量和还原糖含量呈显著正相关。微生物溯源分析表明,堆积发酵0 d和堆积发酵3 d糟醅中优势微生物主要来源于堆积地面(32.44%~57.37%)和生产器具(26.89%~50.74%),堆积发酵6 d至窖池发酵43 d糟醅中优势微生物主要来源于窗台墙壁等物体表面(86.41%~87.31%)。其中unclassified_Lactobacillaceae主要来源于堆积地面(85.79%),堆积发酵6 d后由主要来源于窗台墙壁等物体表面(91.96%~94.91%)。Pichia(1.32%~87.06%)在酿造环境中来源较多,堆积发酵6 d前,在堆积发酵过程中其主要来源于厂房内空气、生产器具和窗台墙壁等物体表面,窖池发酵过程主要来源于窖池内壁,占比为18.21%~30.79%。本研究进一步揭示了酱香型白酒一轮次堆积和窖池发酵过程糟醅微生物群落组成与理化指标的关联作用以及优势微生物菌群来源,为阐明酱香型白酒酿造机理提供了理论基础。

关键词：酱香型白酒堆积和窖池发酵相关性微生物群落结构微生物溯源

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