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Algal community structure prediction by machine learning

Environmental Science and Ecotechnology 2023年第2期14卷 53-62页

作者： Muyuan Liu Yuzhou Huang Jing Hu junyu he Xi Xiao Ocean College Zhejiang University#1 Zheda RoadZhoushanZhejiang316021China Ocean Academy Zhejiang University#1 Zheda RoadZhoushanZhejiang316021China Key Laboratory of Marine Ecological Monitoring and Restoration Technologies Ministry of Natural ResourcesShanghai201206China Donghai Laboratory ZhoushanZhejiang316021China Key Laboratory of Watershed Non-point Source Pollution Control and Water Eco-security of Ministry of Water Resources College of Environmental and Resources SciencesZhejiang UniversityHangzhouZhejiang310058China

The algal community structure is vital for aquatic ***,the complicated environmental and biological processes make modeling *** cope with this difficulty,we investigated using random forests(RF)to predict phytoplankton community shifting based on multi-source environmental factors(including physicochemical,hydrological,and meteorological variables).The RF models robustly predicted the algal communities composed by 13 major classes(Bray-Curtis dissimilarity=9.2±7.0%,validation NRMSE mostlyhe total biomass(validation R^(2)>0.74)in Norway's largest lake,Lake *** importance analysis showed that the hydro-meteorological variables(Standardized MSE and Node Purity mostly>0.5)were the most influential factors in regulating the ***,an in-depth ecological interpretation uncovered the interactive stress-response effect on the algal community learned by the RF *** interpretation results disclosed that the environmental drivers(i.e.,temperature,lake inflow,and nutrients)can jointly pose strong influence on the algal community *** study highlighted the power of machine learning in predicting complex algal community structures and provided insights into the model interpretability.

关键词： Phytoplankton community Random forests Environmental driver Meteorology Hydrology Model interpretability

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Gold Price Model for the Modem Economic System

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International Journal of Technology Management 2013年第7期 1-3页

作者： junyu he School of Mathematics and Statistics Wuhan University WuhanHubei430000 China

Since the early nineteen seventies, the gold price has been dramatically changed. The price of an ounce of gold was only about 30 dollars in the early nineteen seventies. Yet, at the beginning of the 80＇s, the price rose to nearly S700 per ounce. And at the beginning of this century, the price lowered down to S270 per ounce. Again, it reached a highest price in 30 years in September,

关键词：价格模型黄金价格经济体系 S700 价格上涨年代美元

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YWHAH activates the HMGA1/PI3K/AKT/mTOR signaling pathway by positively regulating Fra-1 to affect the proliferation of gastric cancer cells

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Oncology Research 2023年第4期31卷 615-630页

作者： junyu he FENG ZENG XI JIN LIN LIANG MENGXIANG GAO WENTAO LI GUIYUAN LI YANHONG ZHOU NHC Key Laboratory of Carcinogenesis Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of MedicineCentral South UniversityChangsha410013China Cancer Research Institute Basic School of MedicineCentral South UniversityChangsha410078China Hunan Key Laboratory of Cancer Metabolism Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of MedicineCentral South UniversityChangsha410013China

Fos-related antigen 1(Fra-1)is a nuclear transcription factor that regulates cell growth,differentiation,and *** is involved in the proliferation,invasion,apoptosis and epithelial mesenchymal transformation of malignant tumor ***-1 is highly expressed in gastric cancer(GC),affects the cycle distribution and apoptosis of GC cells,and participates in GC occurrence and ***,the detailed mechanism of Fra-1 in GC is unclear,such as the identification of Fra-1-interacting proteins and their role in GC *** this study,we identified tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein eta(YWHAH)as a Fra-1-interacting protein in GC cells using co-immunoprecipitation combined with liquid chromatography-tandem mass *** showed that YWHAH positively regulated Fra-1 mRNA and protein expression,and affected GC cell *** proteome analysis showed that Fra-1 affected the activity of the high mobility group AT-hook 1(HMGA1)/phosphatidylinositol-4,5-bisphosphate 3-kinase(PI3K)/protein kinase B(AKT)/mechanistic target of rapamycin(mTOR)signaling pathway in GC *** blotting and flow cytometry confirmed that YWHAH activated HMGA1/PI3K/AKT/mTOR signaling pathway by positively regulating Fra-1 to affect GC cell *** results will help to discover new molecular targets for the early diagnosis,treatment,and prognosis prediction of GC.

关键词： Gastric cancer Fra-1 YWHAH Signal transduction pathway Cell proliferation

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Time series models in prediction of severe fever with thrombocytopenia syndrome cases in Shandong province,China

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Infectious Disease Modelling 2024年第1期9卷 224-233页

作者： Zixu Wang Wenyi Zhang Ting Wu Nianhong Lu junyu he Junhu Wang Jixian Rao Yuan Gu Xianxian Cheng Yuexi Li Yong Qi Pest Control Department Huadong Research Institute for Medicine and BiotechniquesNanjingJiangsu province210002China Bengbu Medical College BengbuAnhui province233030China Chinese PLA Center for Disease Control and Prevention Beijing100071China Jinling Hospital Medical School of Nanjing UniversityNanjingJiangsu province210002China Ocean College Zhejiang UniversityZhoushan316021China Ocean Academy Zhejiang UniversityZhoushan316021China

Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease caused by the SFTS virus (SFTSV). Predicting the incidence of this disease in advance is crucial for policymakers to develop prevention and control strategies. In this study, we utilized historical incidence data of SFTS (2013–2020) in Shandong Province, China to establish three univariate prediction models based on two time-series forecasting algorithms Autoregressive Integrated Moving Average (ARIMA) and Prophet, as well as a special type of recurrent neural network Long Short-Term Memory (LSTM) algorithm. We then evaluated and compared the performance of these models. All three models demonstrated good predictive capabilities for SFTS cases, with the predicted results closely aligning with the actual cases. Among the models, the LSTM model exhibited the best fitting and prediction performance. It achieved the lowest values for mean absolute error (MAE), mean square error (MSE), and root mean square error (RMSE). The number of SFTS cases in the subsequent 5 years in this area were also generated using this model. The LSTM model, being simple and practical, provides valuable information and data for assessing the potential risk of SFTS in advance. This information is crucial for the development of early warning systems and the formulation of effective prevention and control measures for SFTS.

关键词： Severe fever with thrombocytopenia syndrome Long short-term memory Prediction model Autoregressive integrated moving average Prophet

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Spatiotemporal Mapping of Salt Marshes in the Intertidal Zone of China during 1985-2019

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Journal of Remote Sensing 2022年第1期2022卷 284-298页

作者： Guangwei Chen Runjie Jin Zhanjiang Ye Qi Li Jiali Gu Min Luo Yongming Luo George Christakos James Morris junyu he Dan Li hengwei Wang Li Song Qiuxuan Wang Jiaping Wu Ocean College Zhejiang UniversityZhoushan 316021China Ocean Academy Zhejiang UniversityZhoushan 316021China Institute of Soil Science Chinese Academy of SciencesNanjing 210008China Baruch Institute for Marine&Coastal Sciences University of South CarolinaSC 29208USA

This study mapped the areal extent,identified the species composition,and analyzed the changes of salt marshes in the intertidal zone of China during the period 1985–*** the aid of the cloud platform of the Google Earth Engine,we selected Landsat 5/8 and Sentinel-2 images and used the support vector machine classification method to extract salt marsh information for the years of 1985,1990,1995,2000,2005,2010,2015,and *** major species of salt marshes:Phragmites australis,Suaeda spp.,Spartina alterniflora,Scirpus mariqueter,Tamarix chinensis,Cyperus malaccensis,and Sesuvium portulacastrum were *** results showed that salt marshes are mainly distributed in Liaoning,Shandong,Jiangsu,Shanghai,and Zhejiang,with varying patterns of shrinking,expansion,or wavering in different *** distribution of salt marshes has declined considerably from 151,324 ha in 1985 to 115,397 ha in 2019,a drop of 23.7%.During the same period,the area of native species has dropped 95.4%from 77,741 ha to 3,563 ha for Suaeda *** 45.1%from 60,511 ha to 33,193 ha for ***;on the contrary,the area of exotic species,***,has exhibited a sharp rise from just 99 ha to 67,527 *** the past 35 years,the driving factors causing salt marsh changes are mainly land reclamation,variations in water and sand fluxes,and interspecific competition and succession of salt marsh *** results provide fundamental reference information and could form the scientific basis for formulating policies for the conservation and utilization of salt marsh resources in China.

关键词： driving Zone Mapping

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掺粉煤灰混凝土配合比设计方法

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路基工程 2006年第2期 101-103页

作者：贺军鱼中铁八局集团第三工程有限公司贵州贵阳550002

混凝土中掺粉煤灰可起到节约水泥降低成本、降低水化热、改善混凝土施工和易性等作用,但目前有关粉煤灰混凝土配合比实际方法及标准不完善,使粉煤灰的性能优势不明显。通过本文就粉煤灰混凝土配合比设计方法进行论述总结,以充分发挥粉... 详细信息

混凝土中掺粉煤灰可起到节约水泥降低成本、降低水化热、改善混凝土施工和易性等作用,但目前有关粉煤灰混凝土配合比实际方法及标准不完善,使粉煤灰的性能优势不明显。通过本文就粉煤灰混凝土配合比设计方法进行论述总结,以充分发挥粉煤灰的优势。

关键词：粉煤灰混凝土配合比设计

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保证明挖隧道防水效果应注意的几个问题

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现代隧道技术 2006年第6期43卷 80-83页

作者：郭卫社何君茹中铁隧道集团有限公司洛阳471009

隧道渗漏往往带来结构损坏、设备腐蚀、影响外观和危害运营安全,甚至造成地面建筑物的不均匀沉降,因此保证明挖隧道的防水效果非常重要。文章从施工实践中总结出了保证明挖隧道防水效果应注意的几个问题,对类似工程具有借鉴作用。

关键词：明挖隧道渗漏原因防水效果

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明清广西方志“荆扬分野”问题探研

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中国地方志 2022年第6期 45-51,M0004,M0005页

作者：何俊宇复旦大学历史地理研究中心

秦汉以降,广西分野经历由独属“扬州”到荆、扬两种分野类型并存的转变,实际上是广西走向高层政区之路的缩影,具有深刻的历史内涵。这一转变过程总体上呈现“荆州”分野南拓,“扬州”分野东缩的态势,最终形成了广西东部梧州府数县属“... 详细信息

秦汉以降,广西分野经历由独属“扬州”到荆、扬两种分野类型并存的转变,实际上是广西走向高层政区之路的缩影,具有深刻的历史内涵。这一转变过程总体上呈现“荆州”分野南拓,“扬州”分野东缩的态势,最终形成了广西东部梧州府数县属“扬州”分野,其余西部府州县皆属“荆州”分野的特殊局面,这也正是天文分野理论与实际空间位置相适应的结果。包括南宋蔡戡在内的学者对“荆扬分野”进行了理论层面的建构,而后世的广西方志修纂者基本因袭旧说而不加创造。方志修纂者对于天文分野的态度不一,各自在志书中表达了关于天文分野归属的认识和态度。

关键词：广西地方志分野

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火花放电法制备纳米材料及其应用综述

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材料导报 2024年第7期38卷 134-142页

作者：张昱梁沛林何钧宇杨冠南崔成强广东工业大学省部共建精密电子制造技术与装备国家重点实验室广州511400

纳米材料在光学、热学、电学、磁学、力学等方面表现出优异的特性,已广泛应用于储氢、催化、太阳能电池、微电子封装、生物医疗等领域。火花放电法是一种制备纳米粒子的有效手段,具有普适性广、纯度高、操作过程简单、方法灵活、对环境... 详细信息

纳米材料在光学、热学、电学、磁学、力学等方面表现出优异的特性,已广泛应用于储氢、催化、太阳能电池、微电子封装、生物医疗等领域。火花放电法是一种制备纳米粒子的有效手段,具有普适性广、纯度高、操作过程简单、方法灵活、对环境友好等特点。本文概述了火花放电发生器的基本组成部分、火花放电过程的原理,对纳米粒子的形成机制以及影响纳米粒子尺寸和产率的关键因素进行详细分析,列举了制备的纳米材料种类的多样性,并综述了该技术制备的纳米材料在诸多领域展现出的优异性能,最后对火花放电制备纳米材料及其应用领域的发展进行了展望。

关键词：纳米材料火花放电粒子形成机制

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Genotypic variation in grain mercury accumulation of lowland rice

Genotypic variation in grain mercury accumulation of lowland...

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International Symposium on Green Technology and Ecosystem health

作者： Cheng Zhu Yuping Yan junyu he and Guoming Shen State Key Laboratory of Plant Physiology and Biochemistry Zhejiang University Hangzhou 310058 China

＜正＞Being the most developed and populous area of China, the Yangtze River Delta has been polluted by heavy metals, to assess the risk of mercury in mainly cultivated rice in this area, a pot experiment with 38 comm... 详细信息

关键词： mercury (Hg Ⅱ) soil contamination accumulation grain yield rice (Oryza sativa L.)

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