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National Science Review 2024年第1期11卷 204-214页

作者： jing-Yang you Gang Su Yuan Ping Feng Department of Physics National University of Singapore Kavli Institute for Theoretical Sciences and CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Centre for Advanced 2D Materials National University of Singapore

The finite Berry curvature in topological materials can induce many subtle phenomena, such as the anomalous Hall effect(AHE), spin Hall effect(SHE), anomalous Nernst effect(ANE), non-linear Hall effect(NLHE) and bulk photovoltaic effects. To explore these novel physics as well as their connection and coupling, a precise and effective model should be developed. Here, we propose such a versatile model—a 3D triangular lattice with alternating hopping parameters, which can yield various topological phases,including kagome bands, triply degenerate fermions, double Weyl semimetals and so on. We reveal that this special lattice can present unconventional transport due to its unique topological surface states and the aforementioned topological phenomena, such as AHE, ANE, NLHE and the topological photocurrent effect. In addition, we also provide a number of material candidates that have been synthesized experimentally with this lattice, and discuss two materials, including a non-magnetic triangular system for SHE, NLHE and the shift current, and a ferromagnetic triangular lattice for AHE and ANE. Our work provides an excellent platform, including both the model and materials, for the study of Berry-curvature-related physics.

关键词： three-dimensional triangular lattice different topological phases various topological effects Berry curvature

Influence of dissolved organic carbon on multimedia distribution and toxicity of fipronil and its transformation products in lotic waterways

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Journal of Environmental Sciences 2023年第8期130卷 52-64页

作者： Weizong Li Hao Hu Fen Liu Huizhen Li jing you School of Environment and Guangdong Key Laboratory of Environmental Pollution and Health Jinan UniversityGuangzhou 511443China

Environmental fate and ecological impacts of fipronil and its transformation products(FIPs)in aquatic environment have caused worldwide attention,however,the influence of dissolved organic carbon(DOC)on multimedia distribution,bioavailability,and toxicity of FIPs in field waterways was largely unknown.Here,we collected 11 companion water and sediment samples along a lotic stream in Guangzhou,South China.FIPs were ubiquitous with total water concentrations ranging from 1.22 to 43.2 ng/L(14.8±12.9 ng/L)and fipronil sulfone was predominant in both water and sediment.More than 70%of FIPs in aqueous phase were bound to DOC and the KDOC values of FIPs were approximately 1–2 orders of magnitude higher than K_(d-s)/K_(OC),emphasizing the significance of DOC in phase partitioning and transport of FIPs in aquatic environment.Water and sediment samples were more toxic to Chironomus dilutus than Hyallela azteca,and FIPs(especially fipronil sulfone)pronouncedly contributed toxicity to C.dilutus.Toxic units(TU)based on freely dissolved concentrations in water determined by solid phase microextraction significantly improved toxicity estimation of FIPs to the invertebrates compared to TUs based on aqueous concentrations.The present study highlights the significance of DOC association on fate and ecological risk of hydrophobic insecticides in lotic ecosystem.

关键词： Hydrophobic organic contaminant Bioavailability Partitioning Aquatic toxicity Passive sampler

Joint effects of micro-sized polystyrene and chlorpyrifos on zebrafish based on multiple endpoints and gut microbial effects

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Journal of Environmental Sciences 2023年第4期126卷 184-197页

作者： Zhiyi Huang Xiangxiang Xiao Dali Wang Yuheng Zhong Qi Ding jing you Guangdong Key Laboratory of Environmental Pollution and Health Center for Environmental Microplastics StudiesSchool of EnvironmentJinan UniversityGuangzhou 511443China

Microplastics often co-occur with a variety of organic contaminants in aquatic environment and pose combined risks to aquatic wildlife. Here, we investigated joint effects of microsized polystyrene(mPS, 5 μm) and an organophosphate pesticide chlorpyrifos on zebrafish,using multiple endpoints at both fish individual and gut microbiota levels. It was revealed that mPS ingested by zebrafish accumulated in gut and liver, and caused oxidative stress, hyperactive swimming performance and histological damages in fish, and induced disorders and diversity alterations of the gut microbial community. More importantly, mPS exhibited considerable adsorption capacity against chlorpyrifos, and those adsorbing chlorpyrifos presented greater effects on fish individuals but no different effects on gut microbiota compared to single mPS exposure. Together with body residues of chlorpyrifos in zebrafish,it was proposed that the joint effects between mPS and chlorpyrifos were attributed to the chlorpyrifos released from mPS within zebrafish. The present results provided a comprehensive understanding of joint effects of mPS and contaminants co-occurring in the environment and emphasized the importance of considering the adsorbed chemicals in toxicological studies of microplastics.

关键词： Microplastics Polystyrene Joint effect Chlorpyrifos Zebrafish

原子层沉积金属氧化物缓冲层制备高性能大面积钙钛矿太阳电池

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物理学报 2024年第9期73卷 317-325页

作者：瞿子涵赵洋马飞游经碧中国科学院半导体研究所半导体物理实验室北京100083 中国科学院大学材料科学与光电工程中心北京100049

研制具有较大活性面积的钙钛矿太阳电池对领域面向产业化的发展具有重要意义.当前,大面积钙钛矿太阳电池的性能与小面积钙钛矿太阳电池之间仍存在较大差距.本文提出一种在透明导电薄膜衬底上预先原子层沉积TiO_(2)薄层的策略,有效避免... 详细信息

研制具有较大活性面积的钙钛矿太阳电池对领域面向产业化的发展具有重要意义.当前,大面积钙钛矿太阳电池的性能与小面积钙钛矿太阳电池之间仍存在较大差距.本文提出一种在透明导电薄膜衬底上预先原子层沉积TiO_(2)薄层的策略,有效避免了衬底局部突起与钙钛矿吸光层直接接触导致的漏电现象,提升了小面积器件制备工艺的重复一致性.改善的电子输运和光管理过程也提高了小面积器件的效率.更重要的是,本文基于原子层沉积的TiO_(2)开展了0.5 cm^(2)大面积钙钛矿太阳电池的研究,通过优化TiO_(2)层的厚度,研制出光电转换效率高达24.8%的冠军器件(第三方认证效率24.65%),器件的制备工艺也表现出较好的重复性.此外,原子层沉积了TiO_(2)缓冲层的电池器件在氮气氛围下存储1500 h后仍然能够保留初始性能的95%以上.总之,在粗糙衬底上预先原子层沉积TiO_(2)薄层可以有效抑制局部漏电通道的产生,有利于制备高性能的大面积钙钛矿太阳电池.

关键词：原子层沉积金属氧化物大面积钙钛矿太阳电池

中美页岩气开采返排废水中关键有机污染物的差异化特征

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天然气地球科学 2024年第4期35卷 729-739页

作者：陈科言吴凡李亮游静暨南大学环境学院广东省环境污染与健康重点实验室广东广州510632

页岩气开采过程中产生的返排液和产出水(FPW)中污染物总量大,有机物种类复杂,毒性不确定性高,可能对生态系统和人体健康构成威胁。现有研究对美国页岩气FPW中的有机污染物进行了定性定量分析,但在中国仍缺乏系统研究。综述了中美两国页... 详细信息

页岩气开采过程中产生的返排液和产出水(FPW)中污染物总量大,有机物种类复杂,毒性不确定性高,可能对生态系统和人体健康构成威胁。现有研究对美国页岩气FPW中的有机污染物进行了定性定量分析,但在中国仍缺乏系统研究。综述了中美两国页岩气开采废水中的有机污染物组成情况,比较了同类典型有机污染物的浓度差异,并分析了两国页岩气开采产生关键有机污染物组成和浓度差异的潜在原因。研究发现,中国页岩气FPW中绝大多数有机物的浓度均低于美国(如苯系物、多环芳烃等)。中国页岩气FPW中有机物的定量数据相对缺失,仍需加强对中国页岩气场地关键致毒污染物的识别和定量分析。

关键词：页岩气水力压裂返排液和采出水有机污染物生态风险

考虑C2C转售平台入侵的租售混合渠道动态决策

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系统工程 2024年第1期42卷 73-86页

作者：任君玲经有国秦开大昆明理工大学管理与经济学院云南昆明650093 华中师范大学信息管理学院湖北武汉430079

针对一个由制造商、零售商和租赁商三者组成的且面临外部C2C转售平台入侵的租售混合渠道供应链,考虑消费者对购买和租赁产品的价值感知存在差异,研究消费者价值感知差异系数对C2C转售平台入侵和供应链成员决策的影响。研究表明,当消费... 详细信息

针对一个由制造商、零售商和租赁商三者组成的且面临外部C2C转售平台入侵的租售混合渠道供应链,考虑消费者对购买和租赁产品的价值感知存在差异,研究消费者价值感知差异系数对C2C转售平台入侵和供应链成员决策的影响。研究表明,当消费者价值感知差异系数(下称“感知差异系数”)较大时,C2C转售平台不会入侵;当感知差异系数为中等或较小且入侵固定成本和单位生产成本均较小时,C2C转售平台则会入侵,该入侵使得零售商和租赁商均减少订购数量,从而对零售商、租赁商和制造商均产生不利影响;但当感知差异系数中等偏大时,入侵能增加消费者剩余和社会总福利。

关键词：租售混合渠道 C2C转售平台平台入侵价值感知差异系数

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面向无依托供电场景的小目标检测轻量级模型

计算机工程与设计 2024年第1期45卷 159-167页

作者：冀金金荆有波郑州大学河南先进技术研究院河南郑州450002 中国科学院微电子研究所通信与信息工程研发中心北京100029

针对现有目标检测模型在无依托供电场景存在检测效果不稳定、小目标大量漏检的问题,基于YOLOv4-tiny提出一种改进模型AMS-YOLOv4-tiny。通过在主干网之后引入更平滑的Mish函数、设计一种浅层特征加固的特征融合网络SCFPN、反复嵌入通道... 详细信息

针对现有目标检测模型在无依托供电场景存在检测效果不稳定、小目标大量漏检的问题,基于YOLOv4-tiny提出一种改进模型AMS-YOLOv4-tiny。通过在主干网之后引入更平滑的Mish函数、设计一种浅层特征加固的特征融合网络SCFPN、反复嵌入通道注意力机制3种策略,大幅提升预测特征层对目标的表达能力。实验结果表明,算法在PASCAL VOC07+12数据集上的mAP(mean of average precision)达到87.19%,相比YOLOv4-tiny提高4.45%,且部署在嵌入式设备上进行可行性验证,满足多种复杂场景下人车检测任务的精度与实时性要求。

关键词：小目标检测特征融合网络浅层特征加固通道注意力机制无依托供电目标检测环境多变低功耗

Adsorption behavior of carbon dioxide and methane in bituminous coal:A molecular simulation study

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Chinese Journal of Chemical Engineering 2016年第9期24卷 1275-1282页

作者： jing you Li Tian Chao Zhang Hongxing Yao Wu Dou Bin Fan Songqing Hu Production Engineering Research Institute in Huabei Oilfield Company of CNPC Renqiu 062552China College of Science China University of Petroleum(East China)Qingdao 266580China Huabei Oilfield Shanxi Coalbed Methane Exploration and Development Branch of CNPC Changzhi 048000China Huabei Oilfield Changzhi Coalbed Methane Exploration and Development Branch of CNPC Changzhi 046000China

The adsorption behavior of CO_2, CH_4 and their mixtures in bituminous coal was investigated in this study. First, a bituminous coal model was built through molecular dynamic(MD) simulations, and it was confirmed to be reasonable by comparing the simulated results with the experimental data. Grand Canonical Monte Carlo(GCMC)simulations were then carried out to investigate the single and binary component adsorption of CO_2 and CH_4with the built bituminous coal model. For the single component adsorption, the isosteric heat of CO_2 adsorption is greater than that of CH_4 adsorption. CO_2 also exhibits stronger electrostatic interactions with the heteroatom groups in the bituminous coal model compared with CH_4, which can account for the larger adsorption capacity of CO_2 in the bituminous coal model. In the case of binary adsorption of CO_2 and CH_4mixtures, CO_2 exhibits the preferential adsorption compared with CH_4 under the studied conditions. The adsorption selectivity of CO_2 exhibited obvious change with increasing pressure. At lower pressure, the adsorption selectivity of CO_2 shows a rapid decrease with increasing the temperature, whereas it becomes insensitive to temperature at higher pressure. Additionally, the adsorption selectivity of CO_2 decreases gradually with the increase of the bulk CO_2 mole fraction and the depth of CO_2 injection site.

关键词：沥青的煤模型吸附选择提高的煤床甲烷恢复二氧化碳隐遁分子的模拟

Sustainable development index of shale gas exploitation in China, the UK, and the US

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Environmental Science and Ecotechnology 2022年第4期12卷 54-64页

作者： Liang Li Fan Wu Yuanyu Cao Fei Cheng Dali Wang Huizhen Li Zhiqiang Yu jing you Guangdong Key Laboratory of Environmental Pollution and Health School of EnvironmentJinan UniversityGuangzhou511443China Institute for Low Carbon and Sustainable Development Jinan UniversityGuangzhou511443China State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou510640China

While shale gas could complement the world's natural gas supply,its environmental tradeoffs and sustainability potential should be cautiously assessed before using it to satisfy future energy needs.Shale gas development in China is still in its infancy but has been progressing by the Central Government at a fast pace nowadays.Advanced experience from North America would greatly benefit sustainable design and decision-making for energy development in China.However,the lack of consistency concerning internal and external parameters among previous investigations does not allow an integrated impact comparison among shale gas-rich countries.Herein,we applied a meta-analysis to harmonize environmental tradeoff data through a comprehensive literature review.Greenhouse gas emission,water consumption,and energy demand were selected as environmental tradeoff indicators during shale gas production.Data harmonization suggested that environmental tradeoffs ranged from 5.6 to 37.4 g CO_(2)-eq,11.0-119.7 mL water,and 0.027-0.127 MJ energy to produce 1 MJ shale gas worldwide.Furthermore,sustainable development indexes(SDIs)for shale gas exploitation in China were analyzed and compared to the United States and the United Kingdom by considering environment,economy,and social demand through an analytic hierarchy process.The United States and China elicit higher SDIs than the United Kingdom,indicating higher feasibility for shale gas exploitation.Although China has relatively low scores in the environmental aspect,large reservoirs and high future market demand make Chinese shale gas favorable in the social demand aspect.Region-specific SDI characteristics identified among representative countries could improve the sustainability potential of regional development and global energy supply.

关键词： Unconventional natural gas Life cycle assessment Meta-analysis Analytic hierarchy process Environmental tradeoffs

Design,synthesis and preliminary biological evaluation of brain targeting L-ascorbic acid prodrugs of ibuprofen

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Chinese Chemical Letters 2013年第2期24卷 117-119页

作者： Xue-Ying Wu Xiao-Cen Li Jie Mi jing you Li Hai College of Pharmacy Chengdu University of Traditional Chinese Medicine Key Laboratory of Drug Targeting and Drug Delivery System of the Education Ministry Department of Medicinal ChemistryWest China School of PharmacySichuan University

Received 4 November 2012 Received in revised form 17 December 2012 Accepted 31 December 2012 Available online 4 February 2013

关键词： Vitamin CBrain targetProdrugGLUT1 transporterSVCT2 transporterIbuprofen