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Ferroelectric-controlled graphene plasmonic surfaces for all-optical neuromorphic vision

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Science China Technological Sciences 2023年

作者： CHEN Jian Bo liU Yu li Shang dong liN lin li ya dong HUANG Wen GUO Jun Xiong School of Integrated Circuits (National Exemplary School of Microelectronics) University of Electronic Science and Technology of China Engineering Research Center of Digital Imaging and Display Ministry of Education Soochow University School of Integrated Circuits Tsinghua University Jincheng Research Institute of Opto-mechatronics Industry 5. Shanxi Key Laboratory of Advanced Semiconductor Optoelectronic Devices and Integrated Systems School of Electronic Information and Electrical Engineering Institute for Advanced Study Chengdu University

Artificial visual systems can recognize desired objects and information from complex environments, and are therefore highly desired for pattern recognition, object detection, and imaging applications. However, state-of-the-art artificial visual systems with high recognition performances that typically consist of electronic devices face the challenges of requiring huge storage space and high power consumption owing to redundant data. Here, we report a terahertz(THz) frequency-selective surface using a graphene split-ring resonator driven by ferroelectric polarization for efficient visual system applications. The downward polarization of the ferroelectric material offers an ultrahigh electrostatic field for doping p-type graphene with an anticipated Fermi level. By optimizing the geometric parameters of the devices and modulating the carrier behaviors of graphene, our plasmonic devices exhibit a tunable spectral response in a range of 1.7–6.0 THz with continuous transmission values. The alloptical neural network using graphene plasmonic surfaces designed in this study exhibited excellent performance in visual preprocessing and convolutional filtering and achieved an ultrahigh recognition accuracy of up to 99.3% in training the Modified National Institute of Standards and Technology(MNIST) handwritten digit dataset. These features demonstrate the great potential of graphene plasmonic devices for future smart artificial vision systems.

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Uniform Rice-like CdS Particles Prepared from Water-in-oil Microemulsions

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Chemical Research in Chinese Universities 2006年第1期22卷 11-13页

作者： ZHOU Hai-cheng XU Sheng PENG Qing li ya-dong The Key Laboratory of Atomic ＆ Molecular Nanosciences of the Ministry of Education Department of ChemistryTsinghua UniversityBeijing100084P.R.China Department of Chemistry and Engineering Shandong University of Technology Zibo 255000 P. R. China

Uniform rice-like CdS particles were synthesized in cyclohexane/Triton X-100/n-pentanol/water quaternary microemulsions. The as-prepared samples were characterized by X-ray diffraction, transmission electron microscopy, and electron diffraction. The results indicate that the size and the shape of the rice-like CdS particles can be influenced by the molar ratio of water to the surfactant（w value） and the reactant concentrations.

关键词： W/O microemulsion Rice-like CdS nanoparticle Value of w Morphology

自体牙骨移植材料修复牙槽骨缺损的应用效果研究

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中国实用口腔科杂志 2024年第1期17卷 74-79页

作者：郭子君丁铭李雅冬中国人民解放军陆军特色医学中心口腔科重庆400042 重庆医科大学附属第一医院口腔科重庆400042

目的研究自体牙骨移植材料结合引导骨再生术(guided bone regeneration,GBR)在修复牙槽骨缺损中的临床效果。方法选择2020年1月至2021年10月于重庆医科大学附属第一医院口腔科就诊的需行GBR修复牙槽骨缺损的患者82例。依照随机数表法... 详细信息

目的研究自体牙骨移植材料结合引导骨再生术(guided bone regeneration,GBR)在修复牙槽骨缺损中的临床效果。方法选择2020年1月至2021年10月于重庆医科大学附属第一医院口腔科就诊的需行GBR修复牙槽骨缺损的患者82例。依照随机数表法分为研究组(42例)和对照组(40例)。研究组患者在种植术中将自体牙骨移植材料植入牙槽骨缺损处,对照组患者在种植术中将Bio-Oss?骨粉植入牙槽骨缺损处。比较两组患者的种植成功率、骨组织指标(颊舌侧骨板宽度、边缘骨吸收量)、种植体稳定性值(implant stability quotient,ISQ)及不良反应发生率。结果术后1年研究组和对照组患者种植成功率的比较,差异无统计学意义(χ^(2)=0.186,P=0.735);两组患者术前及术后即刻的颊舌侧骨板宽度比较,差异均无统计学意义(均P> 0.05);研究组术后12个月的颊舌侧骨板宽度大于对照组,差异有统计学意义(t=3.872,P=0.005);研究组术后12个月的边缘骨吸收量低于对照组,差异有统计学意义(t=-3.030,P=0.039);术后6个月研究组ISQ高于对照组,差异有统计学意义(t=2.996,P=0.017);两组不良反应发生率的比较,差异无统计学意义(χ^(2)=0.076,P=0.532)。结论自体牙骨移植材料与Bio-Oss?骨粉修复牙槽骨缺损均能获得较高的治疗成功率。相比Bio-Oss?骨粉,自体牙骨移植材料能有效增加术后牙槽骨宽度,延缓种植体边缘骨吸收,获得更好的种植体稳定性,具有较高的生物安全性,值得在临床上进一步推广。

关键词：自体牙骨移植材料口腔种植临床效果

High-throughput sequencing of highbush blueberry transcriptome and analysis of basic helix-loop-helix transcription factors

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Journal of Integrative Agriculture 2017年第3期16卷 591-604页

作者： SONG yang liU Hong-di ZHOU Qiang ZHANG Hong-jun ZHANG Zhi-dong li ya-dong WANG Hai-bo liU Feng-zhi Research Institute of Pomology Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Germplasm Resources Utilization)Ministry of Agriculture College of Horticulture Jilin Agricultural University

The highbush blueberry（Vaccinium corymbosum）,Duke,was used to construct a de novo transcriptome sequence library and to perform data statistical analysis.Mega 4,CLC Sequence Viewer 6 software,and quantitative PCR were employed for bioinformatics and expression analyses of the basic helix-loop-helix（BHLH）transcription factors of the sequencing library.The results showed that 28.38 gigabytes of valid data were obtained from transcriptome sequencing and were assembled into 108 033 unigenes.Functional annotation showed that 32 244 unigenes were annotated into Clusters of Orthologous Groups（COG）and Gene Ontology（GO）databases,whereas the rest of the 75 789 unigenes had no matching information.By using COG and GO classification tools,sequences with annotation information were divided into 25 and 52 categories,respectively,which involved transport and metabolism,transcriptional regulation,and signal transduction.Analysis of the transcriptome library identified a total of 59 BHLH genes.Sequence analysis revealed that 55 genes of that contained a complete BHLH domain.Furthermore,phylogenetic analysis showed that BHLH genes of blueberry（Duke）could be divided into 13 sub-groups.PCR results showed that 45 genes were expressed at various developmental stages of buds,stems,leaves,flowers,and fruits,suggesting that the function of BHLH was associated with the development of different tissues and organs of blueberry,Duke.The present study would provided a foundation for further investigations on the classification and functions of the blueberry BHLH family.

关键词： blueberry bioinformatics transcdptome sequencing basic helix-loop-helix transcription factor

基于ALBERT-Seq2Seq模型的多标签农业文本分类方法

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信息技术 2024年第5期48卷 22-29,37页

作者：香慧敏李东亚白涛新疆农业大学计算机与信息工程学院乌鲁木齐830052 新疆农业信息化工程技术研究中心乌鲁木齐830052

针对多标签分类采用现有静态词向量模型无法捕获文本完整语义的问题,文中结合ALBERT与序列到序列模型,提出一种用于农业文本多标签分类的神经网络模型ALBERT-Seq2Seq。该模型采用ALBERT预训练语言模型动态获取农业文本语义信息,利用其... 详细信息

针对多标签分类采用现有静态词向量模型无法捕获文本完整语义的问题,文中结合ALBERT与序列到序列模型,提出一种用于农业文本多标签分类的神经网络模型ALBERT-Seq2Seq。该模型采用ALBERT预训练语言模型动态获取农业文本语义信息,利用其内部多层双向Transformer架构挖掘农业文本信息的深层特征,接着引入Seq2Seq模型构造出多标签分类器并进行训练。在AGRI-ML2020农业文本多标签数据集上进行算法性能测试,实验结果表明,该模型分类F1值达89.5%,能够有效提升农业文本多标签分类效果。

关键词：自然语言处理多标签分类序列到序列模型农业文本深度学习

关于消防水泵控制柜多线控制盘启动控制原理的研究

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建筑技术开发 2024年第3期51卷 123-125页

作者：李亚东刘伟王嘉豪廊坊新奥房地产开发有限公司河北廊坊065001 中国建筑一局(集团)有限公司河北廊坊065001

消防水泵的启动分为手动、自动,其中消防控制室火灾报警控制器的手动控制分为总线控制盘启动和多线控制盘启动。目前消防水泵控制柜关于多线控制盘手动启/停消防水泵的二次控制回路,不管是相关图集以及不同厂家的产品均存在不同的做法... 详细信息

消防水泵的启动分为手动、自动,其中消防控制室火灾报警控制器的手动控制分为总线控制盘启动和多线控制盘启动。目前消防水泵控制柜关于多线控制盘手动启/停消防水泵的二次控制回路,不管是相关图集以及不同厂家的产品均存在不同的做法和差异。研究就相关规范、图集为依据针对消防水泵控制柜的二次控制原理进行分析,并对工程实践提出参考建议,以达到消防水泵控制的合理性和安全性。

关键词：消防水泵控制柜手动启动多线控制盘直启

主链型液晶聚芳酯酰胺的合成、结构与性能研究进展

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高分子通报 2024年第3期37卷 281-296页

作者：李亚东鲍锋王明良朱才镇郑朝晖丁小斌徐坚深圳大学化学与环境工程学院低维材料基因工程研究院深圳518060 中国科学院成都有机化学研究所成都610041

主链型液晶聚合物(main-chain liquid crystalline polymers,MCLCPs)分子链易取向的特性赋予其优异的性能,在航空、电子等领域具有不可替代的地位。其中芳香族聚酯酰胺(aromatic polyesteramides,APEAs)作为重要的一类,解决了单一化学... 详细信息

主链型液晶聚合物(main-chain liquid crystalline polymers,MCLCPs)分子链易取向的特性赋予其优异的性能,在航空、电子等领域具有不可替代的地位。其中芳香族聚酯酰胺(aromatic polyesteramides,APEAs)作为重要的一类,解决了单一化学结构的聚芳酯须在较高温度下加工、聚芳酰胺分子间氢键带来的刚性过大、易吸水等问题,具有可观的应用前景。目前相关研究中的分子链结构与聚合方法繁多,但缺少系统性的梳理。本文按照酯键与酰胺键的生成次序,将APEAs的合成分为同时生成、易生成无规链结构的一步缩聚法与先后分别制备、可得到有规序列的两步缩聚法。另外,不同结构单体的反应特性决定了适用的聚合方法与条件不同,因此本文一并整理了其聚合反应的影响因素。在此基础上,梳理了主链结构与性能的关系,展望未来的发展方向,以期为新型APEAs的合成提供借鉴与参考。

关键词：主链型液晶聚合物聚芳酯酰胺聚合方法

Numerical study on the effective thermal conductivity and thermal tortuosity of porous media with different morphologies

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Science China(Technological Sciences) 2024年第6期67卷 1685-1694页

作者： DU Shen li dong li Meng-Jie HE ya-ling Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an710049China

Effective thermal conductivity and thermal tortuosity are crucial parameters for evaluating the effectiveness of heat conduction within porous media.The direct pore-scale numerical simulation method is applied to investigate the heat conduction processes inside porous structures with different morphologies.The thermal conduction performances of idealized porous structures are directly compared with real foams across a wide range of porosity.Real foam structures are reconstructed using X-ray computed tomography and image processing techniques,while Kelvin and Weaire-Phelan structures are generated through periodic unit cell reconstruction.The detailed temperature fields inside the porous structures are determined by solving the heat conduction equation at the pore scale.The results present that the equivalent thermal conductivity of Kelvin and Weaire-Phelan structures is similar to and greater than that of the real foam structure with the same strut porosity.The thermal tortuosity of real foam structure is relatively larger and the heat conduction path becomes straighter by adopting the anisotropic design.The thermal tortuosity of the fluid channels for Kelvin,Weaire-Phelan,and real foam structures is close to one.The thermal conductivity of porous structures with heat transfer fluid increases as the thermal conductivity ratio of fluid to solid becomes larger.A small porosity of porous media leads to a larger equivalent thermal conductivity due to the dominant contribution of porous skeleton in the heat conduction process.Correlations derived from parallel and series models,as well as the Maxwell-Eucken models,provide decent predictions of effective thermal conductivity,with an average error of less than 8%in the entire range of thermal conductivity ratio.

关键词： volumetric solar receiver porous morphology direct pore-scale simulation equivalent thermal conductivity thermal tortuosity empirical correlation

活心丸联合尼可地尔对冠心病稳定型心绞痛患者心功能、血脂和血液流变学的影响

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现代生物医学进展 2024年第12期24卷 2250-2254页

作者：马鸣飞余英邓利群李亚冬马立萍首都医科大学附属北京安贞医院全科医疗科

目的：观察活心丸联合尼可地尔对冠心病稳定型心绞痛（SA）患者心功能、血脂和血液流变学的影响。方法：根据随机数字表法将我院2020年8月至2022年2月期间收治的130例冠心病SA患者分为对照组（尼可地尔治疗，n=65）和联合组（尼可地尔... 详细信息

目的：观察活心丸联合尼可地尔对冠心病稳定型心绞痛（SA）患者心功能、血脂和血液流变学的影响。方法：根据随机数字表法将我院2020年8月至2022年2月期间收治的130例冠心病SA患者分为对照组（尼可地尔治疗，n=65）和联合组（尼可地尔联合活心丸治疗，n=65）。对比两组心功能指标、临床症状改善情况、血液流变学指标、血脂指标、疗效以及不良反应。结果：对照组的总有效率低于联合组（P0.05）。结论：采用活心丸联合尼可地尔治疗冠心病SA，可提高临床疗效，改善心功能，调节血脂和血液流变学水平。

关键词：活心丸尼可地尔冠心病稳定型心绞痛血脂心功能血液流变学