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肠道多原发性肝样腺癌一例

中华胃肠外科杂志 2024年第6期27卷 639-641页

作者：谢礼锋贾静柳燕李新宇福建医科大学附属泉州第一医院胃肠外科泉州362000 福建医科大学研究生院福州350001

肝样腺癌是一种罕见的肝外恶性肿瘤,具有与肝细胞癌相似的形态学特征和组织学特征。其多发生于胃部,原发于肠道者较为罕见。本文报道1例肠道多原发性肝样腺癌的诊治过程,旨在为临床医师提供参考。

关键词：肝样腺癌胃肠道肿瘤个案报道

基于多级交通协同管控策略的智慧高速公路典型场景仿真与评价研究

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公路 2024年第09期69卷 186-196页

作者：谢智英罗石贵广东省高速公路有限公司粤赣河惠扩建工程管理处中国公路工程咨询集团有限公司

为应对高速公路偶发事件下造成的交通拥堵、车辆延误等问题，充分考虑智慧高速公路对交通流和交通事件的感知能力，提出一种应用于不同交通场景下，以可变限速控制、应急车道动态管控、动态匝道控制和上游远端截流为核心的多方式协同分... 详细信息

为应对高速公路偶发事件下造成的交通拥堵、车辆延误等问题，充分考虑智慧高速公路对交通流和交通事件的感知能力，提出一种应用于不同交通场景下，以可变限速控制、应急车道动态管控、动态匝道控制和上游远端截流为核心的多方式协同分级管控策略。根据所提出的策略，选取了交通事故和道路施工两种典型场景，基于VISSIM仿真软件，对这两种事件进行二次开发与参数设置，采用时间和空间占用指标来描述事件的属性，包括占用车道数、占道位置和事件持续时间等。并且结合不同背景流量，提取可能最大排队长度、延误等评价指标，通过仿真推演验证了管控策略的有效性。提出的多级协同管控策略逻辑框架，可作为面向高速公路管理人员在处理不同交通事件时的决策需求的统一技术流程，从而为智慧高速公路多维度、高密度感知环境下的交通协同管控提供技术支撑，对于提高高速公路的交通运行效率和保障交通安全具有重要作用。

关键词：智慧高速公路多级协同管控策略可变限速控制应急车道匝道控制 VISSIM二次开发

基于四素同构的哈尼族传统村落声景特征及保护策略--以阿者科为例

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中国园林 2024年第4期40卷 116-122页

作者：谢辉朱颖罗俊田雨重庆大学建筑城规学院重庆400045 重庆大学美视电影学院重庆400045

哈尼族传统村落因其独特的文化和生态布局,声景资源丰富且特色鲜明,但缺乏系统性研究。以“森林-村寨-梯田-水系”四素同构的哈尼族传统村落阿者科为例,对四素空间的声环境进行主客观评价分析。发现多数空间的声压级在50dBA左右,且以低... 详细信息

哈尼族传统村落因其独特的文化和生态布局,声景资源丰富且特色鲜明,但缺乏系统性研究。以“森林-村寨-梯田-水系”四素同构的哈尼族传统村落阿者科为例,对四素空间的声环境进行主客观评价分析。发现多数空间的声压级在50dBA左右,且以低频为主。村落以水为径,串联起自然生态,水声还能为游客提供较高的情绪价值;文化与自然空间相互作用后的声景舒适度为最高;村民生长于斯,赋予了村落丰富的声景资源。最后提出了3个声景保护策略,即保护村落的原真性,实现特色声景的有机呈现;促进生态保护与水源保育的正向循环,构建自然和谐的声景;激活人的活态属性,延续村落空间的声景活力。

关键词：风景园林声景哈尼族传统村落四素同构保护框架

Characteristics of the SOL ion-to-electron temperature ratio on the J-TEXT tokamak with different plasma configurations

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Plasma Science and Technology 2024年第2期26卷 13-21页

作者：李存凯梁云峰江中和周松华建坤阳杰杨庆虎 Alexander KNIEPS Philipp DREWS 徐鑫毛飞越谢伟杨雨桐郭金龙李杨波任正康陈志鹏王能超 the J-TEXT Team International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China Forschungszentrum Jülich GmbH Institut für Energie-und Klimaforschung—PlasmaphysikPartner of the Trilateral Euregio Cluster(TEC)Julich 52425Germany 不详

Accurate measurement of the average plasma parameters in the edge region,including the temperature and density of electrons and ions,is critical for understanding the characteristics of the scrape-off layer(SOL) and divertor plasma transport in magnetically confined fusion *** the J-TEXT tokamak,a multi-channel retarding field analyzer(RFA) probe has been developed to study average plasma parameters in the edge region under various poloidal divertor and island divertor *** edge radial profile of the ion-to-electron temperature ratio,τ_(i/e),has been determined,which gradually decreases as the SOL ion self-collisionality,v_(SOL)*,*** is broadly consistent with what has been observed previously from various tokamak ***,the comparison of experimental results under different configurations shows that in the poloidal divertor configuration,even under the same v_(SOL)*,τ_(i/e) in the SOL region becomes smaller as the distance from the X-point to the target plate *** the island divertor configuration,τ_(i/e) near the O-point is higher than that near the X-point at the same v_(SOL)*,and both are higher than those in the limiter *** results suggest that the magnetic configuration plays a critical role in the energy distributions between electrons and ions at the plasma boundary.

关键词： ion temperature island divertor poloidal divertor retarding field analyzer(RFA)probe

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单空位缺陷对二维δ-InSe稳定性的影响

物理学报 2024年第4期73卷 127-135页

作者：苗瑞霞王业飞谢妙春张德栋西安邮电大学电子工程学院西安710121

二维InSe半导体材料由于其优异的电学性能以及适中可调的带隙等优点,引起了研究者的关注.材料中的空位缺陷不仅影响材料的光电学特性,还影响材料的环境稳定性.相比于InSe材料中的其他相,δ-InSe具有更优异的材料性能,然而关于对该材料... 详细信息

二维InSe半导体材料由于其优异的电学性能以及适中可调的带隙等优点,引起了研究者的关注.材料中的空位缺陷不仅影响材料的光电学特性,还影响材料的环境稳定性.相比于InSe材料中的其他相,δ-InSe具有更优异的材料性能,然而关于对该材料环境稳定性影响的研究未见报道.本文基于密度泛函理论,系统研究了O_(2)环境下二维δ-InSe材料的稳定性问题.结果表明:1)在O_(2)环境下,完美δ-InSe表面具有良好的惰性和稳定性,O_(2)分子在其表面从物理吸附到解离吸附需要克服1.827 eV的势垒;2)Se空位(V_(Se))的存在则会促进δ-InSe的氧化反应,被氧化的过程仅需克服0.044 eV的势垒,说明V_(Se)的存在使δ-InSe在O_(2)环境下的稳定性显著下降,此外被O_(2)分子氧化的δ-InSe单层有利于H_(2)O分子的解离吸附;3)含有In空位(V_(In))的δ-InSe被氧化的速率较慢,O_(2)分子在V_(In)表面的物理吸附的吸附能和电荷转移与完美表面基本一致,被氧化的过程需克服1.234 eV的势垒.这一研究结果将为更好地理解单空位缺陷对δ-InSe单层的氧化行为提供理论指导,同时为高可靠二维δ-InSe器件的实验制备提供参考.

关键词： δ-InSe O_(2) 单空位缺陷稳定性

Characterization and properties of a Sr2Si5N8:Eu^2+-based light-conversion agricultural film

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Journal of Rare Earths 2020年第5期38卷 539-545页

作者： Weibin Wu Zhenbang Zhang Riyue Dong Gening xie Jianxian zhou Kejue Wu Haonan Zhang Qianpei Cai Bingfu Lei College of Engineering South China Agricultural UniversityGuangzhou 510642China Guangdong Laboratory of Lingnan Mordern Agriculture Guangzhou 510642China College of Materials and Energy South China Agricultural UniversityGuangzhou 510642China Guangdong Provincial Engineering Technology Research Center for Optical Agriculture Guangzhou 510642China

In this paper,the fracture surfaces of a light-conversion film were observed using a scanning electron microscope(SEM),and then,the fluorescence spectra and mechanical properties of the film were *** SEM results show that the average diameter of the light conversion agent is 500 *** results of the mechanical properties tests show that the tensile strengths of light-conversion film increase from9.86 to 12.16 MPa and that the strain at breakage increases from 2.37%to 2.75%.In addition,the application effects of the light-co nversion film were *** results indicate that plant height,length of the maximum leaf,width of the maximum leaf and breadth of the plants increase by 24.43%,15.30%,15.60%and 19.07%,*** quality of Chinese flowering cabbages treated with the lightconversion film is superior,including a 9.09%increase in the soluble protein content,a 21.27%increase in the polyphenol content,and a 19.15%increase in the soluble sugar *** on these results,light-conversion films can be applied in agricultural production.

关键词： Light-conversion film Sr2Si5N8%Eu^2+phosphor Biomass Photosynthetic pigment content Rare earths

Current-Induced Magnetization Switching Behavior in Perpendicular Magnetized L1_(0)-MnAl/B2-CoGa Bilayer

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Chinese Physics Letters 2024年第5期41卷 138-143页

作者：孙宏利韩荣坤秦红蕊赵旭鹏谢志成魏大海赵建华 State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100190China International School of Microelectronics Dongguan University of TechnologyDongguan 523808China

Rare-earth-free Mn-based binary alloy L1_(0)-MnAl with bulk perpendicular magnetic anisotropy(PMA) holds promise for high-performance magnetic random access memory(MRAM) devices driven by spin-orbit torque(SOT). However, the lattice-mismatch issue makes it challenging to place conventional spin current sources, such as heavy metals, between L1_(0)-MnAl layers and substrates. In this work, we propose a solution by using the B2-CoGa alloy as the spin current source. The lattice-matching enables high-quality epitaxial growth of 2-nm-thick L1_(0)-MnAl on B2-CoGa, and the L1_(0)-MnAl exhibits a large PMA constant of 1.04 × 10^(6)J/m^(3). Subsequently, the considerable spin Hall effect in B2-CoGa enables the achievement of SOT-induced deterministic magnetization switching. Moreover, we quantitatively determine the SOT efficiency in the bilayer. Furthermore, we design an L1_(0)-MnAl/B2-CoGa/Co_(2)MnGa structure to achieve field-free magnetic switching. Our results provide valuable insights for achieving high-performance SOT-MRAM devices based on L1_(0)-MnAl alloy.

关键词： alloy enable holds

Aerosol characterization in a city in central China plain and implications for emission control

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Journal of Environmental Sciences 2021年第6期33卷 242-252页

作者： Zhijie Li Lu Lei Yanpei Li Chun Chen Qingqing Wang Wei zhou Jiaxing Sun Conghui xie Yele Sun State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and TechnologyNanjing 210044China

Extensive studies on aerosol chemistry have been carried out in megacities in China,however,aerosol characterization in Central China Plain(CCP)is *** we conducted real-time measurements of fine particle composition with a time-of-flight aerosol chemical speciation monitor in Kaifeng,Henan province in October *** results showed that nitrate and organics constituted the major fraction of non-refractory PM_(2.5)for the entire study,on average accounting for 34%and 33%,***,aerosol composition was substantially different among four periods due to different meteorological conditions and chemical *** instance,nitrate presented the lowest contribution during the first period due to evaporative loss associated with high temperature(T),and then rapidly increased during polluted periods as a function of relative humidity(RH).Positive matrix factorization analysis showed the dominance of secondary organic aerosol(SOA)in OA,and also the changes in OA composition under different T and RH *** addition,this study is unique with two periods of local emission *** trajectory and coefficient of divergence analysis showed that air pollution in CCP was overall homogeneously *** a result,the effectiveness of local emission controls in this region was strongly affected by meteorological conditions and regional *** found that one of the periods with emission control even showed the highest concentrations for the entire *** results point towards the limited effect of local emission controls in mitigating air pollution in CCP,and highlight the importance of joint emission controls under unfavorable meteorological conditions.

关键词： Central China plain Aerosol composition Sources Organic aerosol Emission control

基于稳定同位素技术的辽宁浑太河流域水生食物网研究

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水生生物学报 2024年第1期48卷 109-119页

作者：段元帅谢军刘璐霍斌李大鹏华中农业大学水产学院武汉430070 长江经济带大宗水生生物产业绿色发展教育部工程研究中心武汉430070 湖北洪山实验室武汉430070

为探究辽宁省浑太河流域水生生物营养结构特征及其变化,分别于2020年秋季(10月)和2021年春季(5月)对该流域开展渔业资源调查,依据主要消费者及饵料生物样品的碳、氮稳定同位素值(δ13C和δ15N),利用SIBER和MixSIAR模型分析渔获物群落营... 详细信息

为探究辽宁省浑太河流域水生生物营养结构特征及其变化,分别于2020年秋季(10月)和2021年春季(5月)对该流域开展渔业资源调查,依据主要消费者及饵料生物样品的碳、氮稳定同位素值(δ13C和δ15N),利用SIBER和MixSIAR模型分析渔获物群落营养结构的时空差异,并初步构建该流域的食物网。结果表明,主要渔获物的δ13C和δ15N值分别为–37.18‰—–19.28‰和7.98‰—16.51‰,且季节性差异不显著(P>0.05),但δ13C值空间差异极显著(P<0.01)。浑太河流域渔获物的营养级为1.71—4.39,同种鱼类营养级具有极显著的时空差异(P<0.01)。与春季相比,鱼类在秋季摄食的食物资源更丰富、所占的生态位更宽,同时太子河的各项群落营养结构指标均优于浑河。基础食源分析结果表明水生植物与陆生植物分别为浑太河两个季度的主要碳源,陆生植物和POM分别为浑河和太子河中鱼类的主要碳源。研究填补了对浑太河流域水生生物食物网及群落营养结构研究的空缺,为该流域后续的保护、修复及进一步开发提供参考依据。

关键词：水生食物网稳定同位素营养结构浑太河流域

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