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HiFAST:An HI Data Calibration and Imaging Pipeline for FAST.Ⅱ.Flux Density Calibration

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Research in Astronomy and Astrophysics 2024年第8期24卷 100-112页

作者： Ziming Liu Jie Wang Yingjie Jing Zhi-Yu Zhang Chen xu Tiantian Liang Qingze Chen Ningyu Tang Qingliang Yang National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Key Laboratory of Modern Astronomy and Astrophysics Nanjing UniversityNanjing 210023China Department of Physics Anhui Normal UniversityWuhu 241002China

Accurate flux density calibration is essential for precise analysis and interpretation of observations across different observation modes and *** this research,we first introduce the flux calibration model that incorporated in Hi FAST pipeline,and designed for processing HⅠ21 cm ***,we investigate different calibration techniques and assess the dependence of the gain parameter on the time and environmental factors.A comparison is carried out in various observation modes(e.g.,tracking and scanning modes)to determine the flux density gain(G),revealing insignificant discrepancies in G among different ***-term monitoring data shows a linear correlation between G and atmospheric *** subtracting the G-Temperature dependence,the dispersion of G is reduced to~5%)when utilizing a constant G for calibration *** study will serve as a useful addition to the results provided by Jiang et *** measurement of G for the 19 beams of FAST,covering the frequency range 1000-1500 MHz,can be found on the Hi FAST homepage:https://***/fluxgain.

关键词： telescopes-techniques image processing-methods observational-radio continuum galaxies-cosmology observations

Resting-state brain network remodeling after different nerve reconstruction surgeries:a functional magnetic resonance imaging study in brachial plexus injury rats

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Neural Regeneration Research 2025年第5期20卷 1495-1504页

作者： Yunting Xiang Xiangxin Xing xuyun Hua Yuwen Zhang Xin xue Jiajia Wu Mouxiong Zheng He Wang Jianguang xu School of Rehabilitation Science Shanghai University of Traditional Chinese MedicineShanghaiChina Engineering Research Center of Traditional Chinese Medicine Intelligent Rehabilitation Ministry of EducationShanghaiChina Department of Rehabilitation Medicine Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghaiChina Department of Traumatology and Orthopedics Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghaiChina Institute of Science and Technology for Brain-Inspired Intelligence Fudan UniversityShanghaiChina Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence(Fudan University) Ministry of EducationShanghaiChina Human Phenome Institute Fudan UniversityShanghaiChina

Distinct brain remodeling has been found after different nerve reconstruction strategies,including motor representation of the affected ***,differences among reconstruction strategies at the brain network level have not been *** study aimed to explore intranetwork changes related to altered peripheral neural pathways after different nerve reconstruction surgeries,including nerve repair,endto-end nerve transfer,and end-to-side nerve ***–Dawley rats underwent complete left brachial plexus transection and were divided into four equal groups of eight:no nerve repair,grafted nerve repair,phrenic nerve end-to-end transfer,and end-to-side transfer with a graft sutured to the anterior upper ***-state brain functional magnetic resonance imaging was obtained 7 months after *** independent component analysis algorithm was utilized to identify group-level network components of interest and extract resting-state functional connectivity values of each voxel within the *** in intra-network resting-state functional connectivity were compared among the *** muscle reinnervation was assessed by behavioral observation(elbow flexion)and *** results showed that alterations in the sensorimotor and interoception networks were mostly related to changes in the peripheral neural *** repair was related to enhanced connectivity within the sensorimotor network,while end-to-side nerve transfer might be more beneficial for restoring control over the affected limb by the original motor *** thalamic-cortical pathway was enhanced within the interoception network after nerve repair and end-to-end nerve *** areas related to cognition and emotion were enhanced after end-to-side nerve *** study revealed important brain networks related to different nerve *** networks may be potential targets for enhancing motor recovery.

关键词： brain functional networks end-to-end nerve transfer end-to-side nerve transfer independent component analysis nerve repair peripheral plexus injury resting-state functional connectivity

面向6G太赫兹无线通信的关键机器学习技术综述(特邀)

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激光与光电子学进展 2024年第3期61卷 7-31页

作者：周雯徐思聪复旦大学通信科学与工程系电磁波信息科学教育部重点实验室上海200433

太赫兹技术作为6G时代的核心通信技术,可以有效解决频段资源日益稀缺的窘境,以满足流量、连接数急剧增长的需求,实现更大的传输带宽。现有机器学习算法如深度神经网络、卷积神经网络和长短期记忆网络等,均可以有效缓解6G传输系统中的强... 详细信息

太赫兹技术作为6G时代的核心通信技术,可以有效解决频段资源日益稀缺的窘境,以满足流量、连接数急剧增长的需求,实现更大的传输带宽。现有机器学习算法如深度神经网络、卷积神经网络和长短期记忆网络等,均可以有效缓解6G传输系统中的强非线性效应,是实现6G太赫兹无线通信的重要手段。介绍了应用于光子毫米波和太赫兹无线传输系统的不同深度学习范式,讨论了应用光子技术办法产生超高速THz波无线信号的国内外主要进展及技术路线对比,并且对较为经典的或是目前最新的应用于太赫兹通信系统中的人工智能技术进行了介绍,同时对未来大速度、高容量的太赫兹通信技术的发展提出了展望。

关键词：太赫兹无线通信 6G 人工智能机器学习神经网络光纤通信

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硫化剂结构对油溶性Mo基催化剂硫化的影响

石油炼制与化工 2024年第4期55卷 13-18页

作者：彭芳许可中国石化茂名分公司广东茂名525000 中石化石油化工科学研究院有限公司

选取了5种不同结构的硫化物作为硫化剂,以油溶性有机钼催化剂MACC为研究对象进行催化剂硫化试验,考察硫化剂结构对催化剂硫化形成的活性中心结构、形貌、分布以及粒度的影响。结果表明,试验条件下,二苯并噻吩和甲硫醚很难与催化剂发生... 详细信息

选取了5种不同结构的硫化物作为硫化剂,以油溶性有机钼催化剂MACC为研究对象进行催化剂硫化试验,考察硫化剂结构对催化剂硫化形成的活性中心结构、形貌、分布以及粒度的影响。结果表明,试验条件下,二苯并噻吩和甲硫醚很难与催化剂发生硫化反应生成活性中心,十二硫醇、二甲基二硫醚(DMDS)以及升华硫均可与催化剂反应生成活性中心,且十二硫醇作为硫化剂时得到的活性相MoS 2条纹数更少、分散度更高,DMDS和升华硫作为硫化剂时得到的样品硫化度更高(约90%)。模拟MACC催化剂在原料混合罐工况下发生硫化反应,结果表明,二苯并噻吩不能实现MACC催化剂硫化,而升华硫在混合罐条件下可达到较高的硫化度。

关键词：硫化剂油溶性Mo基催化剂硫化度

Trend analysis of stroke risk research based on three-dimensional metrics

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Biomedical Engineering Communications 2024年第3期3卷 12-22页

作者： Ze-Guo Shao Yang Lu Xin-Yue Wang Jie Ma Chen-Di Yuan Fei Wang Qi Sang Wen-Ting xu xu Yang College of Medical Instruments Shanghai University of Medicine and Health SciencesShanghai 201318China Department of Electrical and Electronic Engineering The University of ManchesterManchester M139PLUnited Kingdom School of Health Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China.

This study comprehensively analyzes the status,characteristics,focal points,and evolving trends of global research on“stroke risk analysis”over the past four years(2020–2023),aiming to provide insights for directing future research *** utilizing the Newcastle-Ottawa Scale,63 high-quality research papers were selected and subjected to a systematic literature *** terms of research methods,stroke risk analysis research has evolved from clinical trials(e.g.,establishing control groups,using authoritative scales)towards statistical and data analysis methods(e.g.,decision tree analysis).Regarding research factors,early studies primarily focused on pathological factors associated with hemorrhagic and ischemic stroke,such as hypertension,hyperlipidemia,and *** research from the past two years indicates a shift towards emerging factors,including temperature conditions,air quality,and Corona Virus Disease 2019(COVID-19).In terms of application domains,stroke research covers a broad range of fields but mainly focuses on exploring risk factors,interventions during diagnosis and treatment stages,and rehabilitation,with clinical diagnosis,treatment,and drug intervention studies being *** the research landscape is becoming increasingly diversified and comprehensive,there remains a need for more comprehensive and in-depth studies on novel topics,as well as integrated applications of research methods,presenting ample opportunities for exploring dependent variables in future stroke.

关键词： stroke risk systematic literature review research trends

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老年人植物性饮食与抑郁症状的差异分析

现代预防医学 2024年第15期51卷 2754-2758页

作者：许浩苏州大学附属第一医院

目的分析我国老年人饮食结构与抑郁症状况的相关性，同时探讨不同肥胖状况下老年人摄入植物性饮食对抑郁症状的影响差异。方法基于中国老年健康影响因素跟踪调查（CLHLS）数据，采用植物性饮食指数（plant-based diet index,PDI）、... 详细信息

目的分析我国老年人饮食结构与抑郁症状况的相关性，同时探讨不同肥胖状况下老年人摄入植物性饮食对抑郁症状的影响差异。方法基于中国老年健康影响因素跟踪调查（CLHLS）数据，采用植物性饮食指数（plant-based diet index,PDI）、健康的植物性饮食指数（healthy plant-based diet index,HPDI）和不太健康的植物性饮食指数（unhealthy plant-based diet index,UPDI），分别按五分位数分为Q1～Q5组来描述老年人饮食情况。运用二分类logistic回归模型和夏普利值分析不同肥胖状态老年人群摄入植物性饮食对抑郁症状的影响因素及其差异。结果 PDI对老年人抑郁症状有显著影响，Q2 (OR=0.859,95%CI:0.755～0.978)、Q3 (OR=0.728,95%CI:0.627～0.846)、Q4 (OR=0.775,95%CI:0.675～0.889)和Q5组（OR=0.561,95%CI:0.487～0.646）抑郁症状风险降低至Q1组的85.9%、72.8%、77.5%、56.1%。UPDI对老年人抑郁症状有显著影响，Q4(OR=1.18,95%CI:1.022～1.362)和Q5组（OR=1.482,95%CI:1.287～1.705）抑郁症状风险增加至Q1组的118.0%、148.2%。HPDI对老年人抑郁症状有显著影响，Q3 (OR=0.784,95%CI:0.687～0.895)、Q4(OR=0.722,95%CI:0.629～0.829)和Q5组（OR=0.614,95%CI:0.531～0.709）抑郁症状风险降低至Q1组的78.4%、72.2%、61.4%。结论增加健康的植物性饮食摄入量能预防和改善老年人抑郁症状，建议老年人群在日常饮食中多食用新鲜水果、新鲜蔬菜、植物油脂和豆类，同时增加蛋类食物摄入以预防抑郁症状风险。

关键词：植物性饮食抑郁中心性肥胖夏普利值

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基于深度学习的农机机器英语语料库的设计

农机化研究 2024年第10期46卷 208-212页

作者：徐威武汉晴川学院武汉430204

随着农业机械的智能发展,语言逐渐成为人机交互的重要方式,故建立有效的机器语言翻译模型对于提高智能农业装备的使用性能具有重要的推动作用。随着深度学习及神经网络技术的快速发展,目前已经形成了多元化机器语言翻译模型,并取得了良... 详细信息

随着农业机械的智能发展,语言逐渐成为人机交互的重要方式,故建立有效的机器语言翻译模型对于提高智能农业装备的使用性能具有重要的推动作用。随着深度学习及神经网络技术的快速发展,目前已经形成了多元化机器语言翻译模型,并取得了良好的应用效果。为此,以智慧农业和自然语言处理为研究基础,构建了智能农业机械英汉双语语料库。研究结果表明:提出的模型具有良好的应用效果,且在准确率和机器翻译的效率方面都明显优于传统翻译方法,可为智慧农业的发展提供可靠的双语模型。

关键词：智慧农机深度学习机器翻译

KHSRP通过ANK3调节前列腺癌细胞对雄激素的反应性

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上海交通大学学报（医学版） 2024年第4期44卷 417-426页

作者：蔡人杰徐明上海交通大学医学院附属第九人民医院肿瘤科上海201999

目的·研究KH型剪接调节蛋白(KH-type splicing regulatory protein,KHSRP)对前列腺癌细胞增殖能力的影响及其下游基因的表达调控,考察KHSRP在前列腺癌由雄激素依赖型向非依赖型转变过程中的潜在作用及机制。方法·通过重组慢病毒感染... 详细信息

目的·研究KH型剪接调节蛋白(KH-type splicing regulatory protein,KHSRP)对前列腺癌细胞增殖能力的影响及其下游基因的表达调控,考察KHSRP在前列腺癌由雄激素依赖型向非依赖型转变过程中的潜在作用及机制。方法·通过重组慢病毒感染雄激素依赖型前列腺癌LNCaP细胞和雄激素非依赖型前列腺癌DU145细胞,分别构建KHSRP功能性缺失/获得的稳定细胞株,并比较KHSRP在2种细胞之间的功能差异。采用蛋白质印迹法(Western blotting)检测稳定细胞株中KHSRP、雄激素受体(androgen receptor,AR)及锚定蛋白3(ankyrin 3,ANK3)的表达量。通过细胞增殖实验、平板克隆实验、小鼠成瘤实验等检测KHSRP对LNCaP细胞增殖能力的影响。通过转录组测序(RNA sequencing,RNA-seq)检测KHSRP影响的下游基因,并通过实时荧光定量PCR(quantitative real-time PCR,RT-qPCR)检测KHSRP下游基因的mRNA表达量。结合癌细胞系百科全书(Cancer Cell Line Encyclopedia,CCLE)、癌症基因组图谱(The Cancer Genome Atlas,TCGA)、基因表达综合(Gene Expression Omnibus,GEO)数据库,分析研究ANK3和KHSRP在前列腺组织样本中的表达情况以及ANK3在不同前列腺癌细胞株中的表达差异。结果·GEO数据分析结果显示KHSRP在前列腺癌组织中的表达高于良性前列腺组织,提示其与前列腺癌的发生相关。细胞增殖实验、平板克隆实验、小鼠成瘤实验结果显示KHSRP的表达与LNCaP细胞增殖能力呈负相关,提示KHSRP可以抑制前列腺癌细胞的增殖,且KHSRP对LNCaP细胞增殖能力的影响强于对DU145细胞的影响。对LNCaP稳定细胞株的Western blotting和RT-qPCR检测显示KSHRP过表达后LNCaP细胞中AR蛋白质水平下降,但mRNA水平未产生变化,提示KHSRP可以间接调节AR的蛋白质水平。RNA-seq和RT-qPCR结果显示KHSRP与影响AR蛋白稳定性的调节因子ANK3的表达呈正相关,随后的Western blotting证明KHSRP过表达后ANK3蛋白质的表达量明显升高,TCGA数据分析结果进一步说明KHSRP与ANK3的mRNA表达的相关性。根据CCLE和GEO数据,ANK3的表达与前列腺癌的恶性程度也密切相关。结论·KHSRP可能通过ANK3间接调控AR的蛋白稳定性,影响雄激素依赖型前列腺癌细胞的增殖能力,并介导前列腺癌细胞对雄激素反应性的改变。

关键词： KH型剪接调节蛋白(KHSRP) 雄激素受体(AR) 锚定蛋白3(ANK3) 前列腺癌细胞增殖

Clinical practice guidelines for nutritional assessment and monitoring of adult ICU patients in China

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Journal of Intensive Medicine 2024年第2期4卷 137-159页

作者： Xiangdong Guan Dechang Chen Yuan xu Chinese Society of Critical Care Medicine Department of Critical Care Medicine The First Affiliated Hospital of Sun Yat-sen UniversityGuangzhouChina Department of Critical Care Medicine Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Department of Critical Care Medicine Beijing Tsinghua Changgung HospitalBeijingChina 不详

The Chinese Society of Critical Care Medicine(CSCCM)has developed clinical practice guidelines for nutrition assessment and monitoring for patients in adult intensive care units(ICUs)in *** guideline focuses on nutrition evaluation and metabolic monitoring to achieve optimal and personalized nutrition therapy for critically ill *** guideline was developed by experts in critical care medicine and evidence-based medicine methodology and was developed after a thorough review of the system and a summary of relevant trials or studies published from 2000 to July 2023.A total of 18 recommendations were formed and consensus was reached through discussions and reviews by expert groups in critical care medicine,parenteral and enteral nutrition,and *** recommendations are based on currently available evidence and cover several key fields,including screening and assessment,evaluation and assessment of enteral feeding intolerance,metabolic and nutritional measurement and monitoring during nutrition therapy,and organ function evaluation related to nutrition *** question was analyzed according to the Population,Intervention,Comparison,and Outcome(PICO)*** addition,interpretations were provided for four questions that did not reach a consensus but may have potential clinical and research *** plan is to update this nutrition assessment and monitoring guideline using the international guideline update method within 3–5 years.

关键词： Adults Critical illness Intensive care unit Nutriti on Nutriti on assessment and monitoring Guideline Recommendations Chinese Society of Critical Care Medicine-Chinese Medical Association(CSCCM-CMA)