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Nano Research 2023年第12期16卷 13392-13399页

作者： Hanbo Li Dejing Meng chenqi zhang Yinglu Ji Xinshuang Gao Zhijian Hu Xiaochun Wu CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Herein,a new strategy is proposed for achieving dynamic chiral controls in self-assembly systems of plasmonic nanorods based on temperature-modulation.Via enlarging Au{100}side facets of Au nanorod(AuNR)building block and changing surface ligand from often-used cetyltrimethylammonium bromide(CTAB)to cetylpyridinium chloride(CPC),inversion of chiroptical signal in side-by-side(SS)oligomers is realized.Under the guide of chiral cysteine(Cys),Au{100}side facet-linked SS rods twist in the opposite direction compared with Au{110}side facet-linked counterparts.At high CPC concentration,by controlling the incubation temperature of chiral Cys,the dominant twist mode can be regulated.Finite-difference time-domain(FDTD)simulations indicate the key role of the twisting dihedral angle of the oligomers in driving chiral signal inversion.At low CPC concentration,a temperature-sensitive chiral switching is observed owing to the conformation change of the CPC ligand layer.The temperature-modulated chiral responses are based on the interactions of chiral molecules,achiral surface ligands,and exposed facets of the building block.The rich dynamic tunability of chiroptical responses of plasmonic assemblies may find applications in stimulus-responsive nanodevices.

关键词： plasmonic circular dichroism gold nanorods chiral oligomers cetylpyridinium chloride temperature stimulus

宝莱坞科幻电影的“想象力消费”及其借鉴价值

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福建师范大学学报（哲学社会科学版） 2024年第3期 106-115页

作者：张经武范晨琦福建师范大学传播学院福建福州350117

“想象力消费”这一概念由陈旭光教授提出并在近几年成为电影学研究热点。结合相关理论观察宝莱坞科幻电影,可以体会到鲜明的“想象力消费”特征。首先表现为现代性与民族性的交融,这一特征通过脱域化的背景想象、技术赋能的奇观想象和... 详细信息

“想象力消费”这一概念由陈旭光教授提出并在近几年成为电影学研究热点。结合相关理论观察宝莱坞科幻电影,可以体会到鲜明的“想象力消费”特征。首先表现为现代性与民族性的交融,这一特征通过脱域化的背景想象、技术赋能的奇观想象和民族文化浸润的类型想象得以体现。其次表现为图像景观与消费主义的合谋,这一特征主要体现于图像消费的新媒体化、消费幻景的生产与再生产、歌舞消费的影像化与符号化三个方面。宝莱坞科幻电影植根民族文化,构建银幕上的印度式想象;形成“宝莱坞化”的文化标签,凝聚受众情感;运用“全球本土化”智慧,让本土化“想象力”获得“全球化”变现。这些经验和相关案例对于中国科幻电影高质量发展无疑极具借鉴意义。

关键词：宝莱坞科幻电影想象力想象力消费文化互鉴

浙江省典型污水处理厂中氯苯类化合物的赋存特征及风险评估

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环境化学 2024年第2期43卷 416-424页

作者：李昌林胡林锐郭辰琦曾滔宋爽张海燕国科大杭州高等研究院环境学院杭州310024 浙江工业大学环境学院杭州310032

氯苯类化合物(chlorobenzene,CBs)是一类具有高毒性、难降解和易富集性的有机氯化合物,持续受到广泛关注.污水处理厂在城市水污染控制中发挥着重要作用,然而,目前关于污水处理厂中的CBs研究十分有限,其消减规律与排放特征仍不清楚.本研... 详细信息

氯苯类化合物(chlorobenzene,CBs)是一类具有高毒性、难降解和易富集性的有机氯化合物,持续受到广泛关注.污水处理厂在城市水污染控制中发挥着重要作用,然而,目前关于污水处理厂中的CBs研究十分有限,其消减规律与排放特征仍不清楚.本研究系统分析了浙江省两家典型污水处理厂中CBs的赋存特征、去除效率及排放潜在风险.发现CBs在各污水处理厂污水中普遍存在,但污染水平较低,出水中CBs的总浓度范围为17.4—75.1 ng·L^(-1),远低于我国相关排放标准.二氯苯是进出水中CBs的主要组成成分,占比49.3%—64.1%.厌氧处理及污泥吸附沉淀对CBs的去除效果相对较好,但现有污水处理工艺对CBs的总体去除效果不佳,部分处理单元还存在CBs含量上升情况.基于环境影响度(ambient severity,AS)和风险熵值(risk quotients,RQs)评估结果表明,所研究污水处理厂排放水中CBs对人体健康以及生态风险较小(AS <1,RQs <0.1).研究结果有助于深入了解CBs在污水处理系统中的环境行为和排放风险,也为优化污水处理工艺、进一步控制和减少CBs水污染提供了基础数据.

关键词：氯苯类化合物污水处理厂赋存特征风险评估

路堑特征对高铁红层泥岩基底蠕变上拱特性影响研究

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工程地质学报 2024年第2期32卷 709-718页

作者：颜宏毅赵晓彦李臣奇陈明浩张广泽西南交通大学地质工程系成都611756 中铁十五局城建公司洛阳471000 中铁二院工程集团有限责任公司成都610031

轨面的平顺性是高速铁路(客运专线)正常运营的关键保障。近年来,红层泥岩地区深挖路堑基底持续上拱病害已导致轨面显著不平顺,严重影响高速铁路正常运营。本文以成(都)渝(重庆)客运专线内江北站为研究对象,统计沿线上拱监测数据,分析路... 详细信息

轨面的平顺性是高速铁路(客运专线)正常运营的关键保障。近年来,红层泥岩地区深挖路堑基底持续上拱病害已导致轨面显著不平顺,严重影响高速铁路正常运营。本文以成(都)渝(重庆)客运专线内江北站为研究对象,统计沿线上拱监测数据,分析路堑中心开挖深度与路基基底上拱量值的对应关系,得出开挖卸荷是导致高铁基底上拱的重要原因。分析成渝客运专线上拱段路堑特征,将深挖路堑分为双侧对称型、双侧不对称型和单侧型。通过室内侧限单轴压缩蠕变试验获得砂、泥岩蠕变曲线,采用Burgers模型对曲线进行参数识别,用Flac3D模拟内江北站深挖路堑基底上拱特性,对比分析上拱位移与侧压力系数的模拟值与实测值,验证模型的可行性。在此基础上,模拟分析3种堑型基底上拱特性,得到最不利堑型。最后以最不利堑型为例,研究不同开挖宽深比、不同堑坡坡度下的基底泥岩上拱特性,得到最不利宽深比和坡角。研究结果可为高速铁路红层泥岩的路堑设计提供参考。

关键词：高速铁路红层泥岩堑坡特征卸荷蠕变数值模拟

Isotopic insights on quantitative assessments of interaction of eco-hydrological processes in multi-scale karst watersheds

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International Soil and Water Conservation Research 2024年第1期12卷 156-170页

作者： Zhuo Hao Yang Gao Qingwen zhang Wen Wen Agricultural Clean Watershed Research Group Institute of Environment and Sustainable Development in AgricultureCAASBeijing100081China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchCASBeijing100101China School of Humanities and Social Sciences Beijing Institute of TechnologyBeijing100081China

The dynamics of hydrological processes and the storage mechanisms of karst water resources are the most important issues in karst hydrology.The impact of environmental changes on water quantity,and the evaluation and quantification of eco-hydrological processes remain poorly addressed.In this study,high-frequency continuous monitoring in multi-scale karst watersheds in Southwest China combined the approaches of water isotopes and the hybrid single-particle lagrangian integrated trajectory(HYSPLIT)model to identify the recharge mechanisms between atmospheric vapor,rainfall,surface water,and groundwater,and to reveal the interaction of eco-hydrological processes.The dominant moisture sources in Puding(PD)County were the Indian Ocean(43-69%)and local moisture(24-33%).Theδ^(18)O and deuterium excess(d-excess)values showed a positive correlation indicating that secondary or sub-cloud evaporation was prominent in the wet seasons.Karst water line-conditioned excess(lc-excess)indicated that karst water interacted with recent precipitation,groundwater,and evaporation across seasons.Owing to its specific hydrogeological structure,surface water and rainwater have a higher contribution rate to groundwater replenishment.The chenqi stream replenished the Houzhai River mainly in the form of groundwater,with percentages ranging from 38.1 to 93.5%in the wet season,and 47.8-80.1%in the dry season.In the Houzhai outlet,surface water and groundwater interconverted frequently with a percentage of 45.6-49.1%.We believe this is the first systematic study to quantify the supply relationship between water vapor transport,rainfall,surface water and groundwater in the Chinese karst zone,making a significant move forward in the field of karst hydrological processes and improving the efficiency of water resource evaluation and management.

关键词： Stable isotope Moisture sources Water cycle Karst watersheds

A new oil spill detection algorithm based on Dempster-Shafer evidence theory

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Journal of Oceanology and Limnology 2022年第2期40卷 456-469页

作者： Tianlong zhang Jie GUO chenqi XU Xi zhang Chuanyuan WANG Baoquan LI Yantai Institute of Coastal Zone Research(YIC) Chinese Academy of Sciences(CAS)CAS Key Laboratory of Coastal Environmental Processes and Ecological RemediationYantai 264003China Shandong Key Laboratory of Coastal Environmental Processes Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China University of the Chinese Academy of Sciences Beijing 100049China Frist Institute of Oceanography(FIO) Ministry of Natural Resources(MNR)Qingdao 266061China

Features of oil spills and look-alikes in polarimetric synthetic aperture radar(SAR)images always play an important role in oil spill detection.Many oil spill detection algorithms have been implemented based on these features.Although environmental factors such as wind speed are important to distinguish oil spills and look-alikes,some oil spill detection algorithms do not consider the environmental factors.To distinguish oil spills and look-alikes more accurately based on environmental factors and image features,a new oil spill detection algorithm based on Dempster-Shafer evidence theory was proposed.The process of oil spill detection taking account of environmental factors was modeled using the subjective Bayesian model.The Faster-region convolutional neural networks(RCNN)model was used for oil spill detection based on the convolution features.The detection results of the two models were fused at decision level using Dempster-Shafer evidence theory.The establishment and test of the proposed algorithm were completed based on our oil spill and look-alike sample database that contains 1798 image samples and environmental information records related to the image samples.The analysis and evaluation of the proposed algorithm shows a good ability to detect oil spills at a higher detection rate,with an identifi cation rate greater than 75%and a false alarm rate lower than 19%from experiments.A total of 12 oil spill SAR images were collected for the validation and evaluation of the proposed algorithm.The evaluation result shows that the proposed algorithm has a good performance on detecting oil spills with an overall detection rate greater than 70%.

关键词： synthetic aperture radar(SAR)data oil spill detection subjective Bayesian Faster-region convolutional neural networks(RCNN) Dempster-Shafer evidence theory

Experimental research on oil fi lm thickness and its microwave scattering during emulsifi cation

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Journal of Oceanology and Limnology 2022年第4期40卷 1361-1376页

作者： Jie GUO chenqi XU Genwang LIU Xi zhang Junmin MENG Guangbo REN Yantai Institute of Coastal Zone Research Chinese Academy of Sciences(CAS)CAS Key Laboratory of Coastal Environmental Processes and Ecological RemediationYantai 264003China Shandong Key Laboratory of Coastal Environmental Processes Yantai Institute of Coastal Zone ResearchCASYantai 264003China Center for Ocean Mega-Science CASQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China

Synthetic Aperture Radar(SAR) plays a major role in identifying oil spills on the sea surface.However,obtaining information of oil spill thickness(volume) is still a challenge.Emulsification is an important process affecting the thickness and normalized radar cross section(NRCS) of oil film.Experiments of crude oil emulsification with C-band fully-polarized scatterometer were conducted combining airborne hyperspectral imaging spectrometer and 3 D laser scanner observation data,to provide experimental parameters and method to support accurate remote sensing monitoring on marine oil spill.It is further proved that through quantitative homogeneous emulsified oil spill experiments,to a certain extent,the NRCS of oil film increased during the emulsification process of crude oil.The backscattering mechanism of crude oil emulsification was explored using a semi-empirical model(SEM);the change of oil film NRCS was modulated by its dielectric constant and surface roughness,in which the dielectric constant showed a dominant effect.The relationship between thickness and NRCS of oil film was studied under two experimental conditions.The differences of NRCS between oil film and adjacent seawater(Δσ~0) and the damping ratio(DR) were found to have a linear relationship with oil thickness,which were best in the vertical polarization mode(VV) at 45° incident angle during the quantitative crude oil homogeneous emulsification process.In the natural emulsification process of continuous oil spill in which oil film was mixed with both crude oil and emulsified oil,an empirical equation of oil film thickness is preliminarily established.The Δσ~0,DR,and the empirical equation of oil film thickness were applied to the marine continuous oil spill incident on a 19-3 oil platform with spaceborne SAR image and successfully explained the distribution of the relative thickness of the oil film.

关键词： crude oil emulsifi cation normalized radar cross section(NRCS) moisture content oil fi lm thickness damping ratio 1

不同频次海温强迫对台风“利奇马”模拟的影响

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海洋预报 2024年第2期41卷 71-82页

作者：易侃姚佳伟李响杜梦蛟张蕴斐罗嘉琪王晨琦中国长江三峡集团有限公司科学技术研究院北京101199 国家海洋环境预报中心自然资源部海洋灾害预报技术重点实验室北京100081

基于WRF气象模式,利用不同时间频次的海温强迫场对2019年超强台风“利奇马”个例开展模拟研究。结果表明:不同时间频次海温强迫对台风“利奇马”路径模拟的影响较小,而对台风强度和结构的模拟有较大影响。高频海温强迫场相较于日平均海... 详细信息

基于WRF气象模式,利用不同时间频次的海温强迫场对2019年超强台风“利奇马”个例开展模拟研究。结果表明:不同时间频次海温强迫对台风“利奇马”路径模拟的影响较小,而对台风强度和结构的模拟有较大影响。高频海温强迫场相较于日平均海温场保留了海温与台风相互作用之前的信号,使其在台风路径上的暖涡更暖,导致模拟的台风强度更强,特别是在快速增强阶段与中国气象局台风最佳路径数据更为接近。通过对台风过程中的热力和动力过程分析发现,高频海温强迫场会使更多的水汽进入台风中心,释放凝结潜热,增强台风次级环流。对流增强使得内核区域下沉气流增强,进而加强台风暖心,导致中心气压降低,台风增强;同时,入流的增强使得更多的涡度和角动量向台风中心输送,台风结构紧致,平均切向风增大,台风增强。

关键词：海温台风强度时间分辨率次级环流

基于数据湖的海量异构实时处理技术的研究与应用

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移动信息 2024年第4期46卷 298-300,315页

作者：叶浩张承琪张亚威申小军杨孟新中国联合网络通信有限公司软件研究院济南250100

按照数字中国“2522”的整体框架要求,需持续夯实数据资源体系,充分发挥数据作为新生产要素的关键作用,在新一代数字科技的支撑和引领下,以数据为关键要素,以价值释放为核心,以数据赋能为主线,推动数字化转型,通过“上云用数赋智”行动... 详细信息

按照数字中国“2522”的整体框架要求,需持续夯实数据资源体系,充分发挥数据作为新生产要素的关键作用,在新一代数字科技的支撑和引领下,以数据为关键要素,以价值释放为核心,以数据赋能为主线,推动数字化转型,通过“上云用数赋智”行动,实现高质量的发展。随着企业业务的发展,企业数据数据量不断膨胀,在当前环境下,流批数据复用场景越来越多。传统架构使用数据仓库来处理批计算场景,使用流平台处理流计算场景。相对传统架构,数据湖可以一份存储、批流两用,实现近实时的处理能力,直接进行高效的数据分析。文中提出了一种基于数据湖的数据处理方案,在解决流式处理痛点的同时,实时批流一体处理模式。相对于传统的数据处理模式,流式数据处理有着更高的处理效率和成本控制能力。

关键词：湖仓一体 Flink 计算引擎

Albumin-based multidrug delivery system enriched in Golgi apparatus against metastatic breast cancer

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Nano Research 2023年第4期16卷 5640-5652页

作者： chenqi Guo Xiong Peng Ting Zhao Jiaxing Feng Zhaofei Guo Mengying Wu Rongping zhang Xun Sun Yuan Huang Zhirong zhang Tao Gong Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan UniversityChengdu 610041China

Breast cancer and metastasis remain great challenges in clinical therapy.Compared with monotherapy,combination therapy,especially mediated by nanomedicine delivery strategy,significantly improves the therapeutic efficacy and reduces undesired toxicity.Cyclooxygenase-2(COX-2)inhibitors are widely used for adjuvant chemotherapy because COX-2 is overexpressed in virtually all cancer cell lines to regulate tumor progression by catalyzing prostaglandin E2(PGE2)synthesis.This drug combination strategy is still required to be improved due to some unsatisfactory clinical trial results.Intricate processes of tumor growth and metastasis are orchestrated by multiple proteins in addition to COX-2,which are modified and transported by Golgi apparatus.Hence,disrupting the structure and function of Golgi apparatus can inhibit the secretion of tumor-related proteins and further suppress carcinoma progression and metastasis.Since COX-2 is also enriched within Golgi apparatus in tumor cells,COX-2 inhibitors and Golgi disrupting agents can be co-delivered to Golgi apparatus to maximize the synergy.In this work,we developed a human serum albumin(HSA)nanoparticle encapsulating pirarubicin(THP),retinoic acid(RA),and indomethacin(IMC),called TIR-HSA,which was observed to be localized in Golgi complex of 4T1 cells.Owing to the synergistic effect of these three drugs,TIR-HSA inhibited the proliferation,migration,and invasion of tumor cells,enhanced the apoptotic rate,and improved the immunosuppressive tumor microenvironment,which remarkably regressed the tumor growth and metastasis and prolonged the survival period of 4T1-bearing mice.

关键词： albumin Golgi apparatus metastatic breast cancer adjuvant chemotherapy cyclooxygenase-2(COX-2)inhibitors