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Long-Lasting Filtration of Oily Water by Anti-Fouling Underwater Oleophobic Sand Particles

Journal of Bionic Engineering 2024年第2期21卷 913-923页

作者： Xingyu Liu junxu chen Rui Wang Yifan Su Zhangheng Zhou Zezhong Hou Zhuoran Li Junhao Zhao Weicai Shi Xinquan Yu Zhaopeng Yu Youfa Zhang State Key Laboratory of Advanced Technology for Float Glass CNBM Research Institute for Advanced Glass Materials Group Co.LtdBengbu233000China Jiangsu Key Laboratory of Advanced Metallic Materials School of Materials Science and EngineeringSoutheast UniversityNanjing211189China Research Institute of Petroleum Engineering Technology of Jiangsu Oilfield Yangzhou225009China Kunshan Industrial Technology Research Institute Kunshan215300SuzhouChina School of Automotive Engineering Changshu Institute of TechnologyChangshu215500SuzhouChina

The produced water from the oilfield was purified with filter material and then injected back into the *** serpentine filter material was easy to harden with the increase in filtration amount,which affected the water quality.A superhydrophilic/underwater oleophobic serpentine filter material was successfully prepared by a simple method of coating modification,which exhibited long-lasting filtration of oily water,good filtration and anti-fouling properties,and resistance to *** film-forming material of the superhydrophilic/underwater oleophobic coating was composed of SiO_(2) particles with small size,which could completely and evenly cover the filter *** weight loss was only 7.6%after mechanical stirring for 90 *** with the original filter material,the superhydrophilic/underwater oleophobic serpentine filter material showed a better anti-fouling ability and resistance to *** filtration of crude oil emulsion and oil slick sewage showed a better backwashing *** 35 cycles of continuous filtration of suspended solids in wastewater,the backwashing rate reached 78.4%.The results provided an effective method for the filtration of oily wastewater in the oilfield.

关键词： Serpentine Underwater oleophobic Water immersion resistance Anti-fouling Hardening resistance

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面向国际传播的智库知识库构建研究

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情报杂志 2024年第3期43卷 173-181页

作者：师喆顾洁黄文昕王琳彭菲陈俊旭中国传媒大学媒体融合与传播国家重点实验室北京100024 中国人民警察大学(广州) 广州510080 中国传媒大学电视学院北京100024

[研究目的]国际传播知识生产关涉国家重大战略,关涉国际传播效能,该文旨在以系统的知识工程确立国际传播的核心畛域与中心命题,以期不再囿于学科之争,绘制领域知识“拼图”,实现自主知识体系“重构”。[研究方法]定题采集获取孤立分散... 详细信息

[研究目的]国际传播知识生产关涉国家重大战略,关涉国际传播效能,该文旨在以系统的知识工程确立国际传播的核心畛域与中心命题,以期不再囿于学科之争,绘制领域知识“拼图”,实现自主知识体系“重构”。[研究方法]定题采集获取孤立分散的文本与实践为知识源,提出核心概念、知识规则、应用场景结合的专题领域本体建构方法。并以“全球安全倡议”的理论嬗变和“中、沙、伊三国联合声明”的实践事件为例,验证知识库前沿动向。[研究结论]实证表明,面向国际传播知识的搜集、序化、整理、储存必要性凸显、可行性具备、科学性可论证,基于本体的专题知识库可服务于生产优质、分众、精准的智库成果,构建内在一致、全面完整的自主知识体系,答好国际传播的时代之题。

关键词：国际传播知识库智库自主知识体系全球安全倡议

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Vulnerability of Water Resources and Its Spatial Heterogeneity in Haihe River Basin, China

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Chinese Geographical Science 2014年第5期24卷 525-539页

作者： XIA Jun chen junxu WENG Jianwu YU Lei QI Junyu LIAO Qiang Key Laboratory of Water Cycle & Related Land Surface Processes Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University University of Chinese Academy of Sciences Zhejiang Economic Information Center Haihe River Water Conservancy Committee Faculty of Forestry and Environmental Management University of New Brunswick

To manage water resources effectively, a multiscale assessment of the vulnerability of water resources on the basis of political boundaries and watersheds is necessary. This study addressed issues on the vulnerability of water resources and provided a multiscale comparison of spatial heterogeneity under a climate change background. Using improved quantitative evaluation methods of vulnerabil- ity, the Theil index and the Shannon-Weaver index, we evaluated the vulnerability of water resources and its spatial heterogeneity in the Haihe River Basin in four scales, namely, second-class water resource regions （Class II WRRs）, third-class water resource regions （Class III WRRs）, Province-Class II WRRs, and Province-Class III WRRs. Results show that vulnerability enhances from the north to south in the different scales, and shows obvious spatial heterogeneity instead of moving toward convergence in multiscale assessment results. Among the Class II WRRs, the Tuhai-Majia River is the most vulnerable area, and the vulnerability of the Luanhe River is lower than that of the north of the Haihe River Basin, which in turn is lower than that of the south of the Haihe River Basin. In the scales of Class III WRRs and Province-Class III WRRs, the vulnerability shows obvious spatial heterogeneity and diversity measured by the Theil index and the Shannon-Weaver index. Multiscale vulnerability assessment results based on political boundaries and the watersheds of the Haihe River Basin innovatively provided in this paper are important and useful to characterize the real spatial pattern of the vulnerability of water resources and improve water resource management.

关键词： water resource vulnerability assessment Theil index Shannon-Weaver index spatial heterogeneity Haihe River Basin

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Sensitivity and vulnerability of water resources in the arid Shiyang River Basin of Northwest China

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Journal of Arid Land 2014年第6期6卷 656-667页

作者： Long WAN Jun XIA HongMei BU Si HONG junxu chen LiKe NING Key Laboratory of Water Cycle & Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences Graduate University of Chinese Academy of Sciences State Key Laboratory of Water Resources & Hydropower Engineering Sciences Wuhan University

The sensitivity and vulnerability of water resources to climate change is difficult to assess. In this study, we used a conceptual hydrologic model to investigate the sensitivity of streamflow to climate change. We also pro- posed a framework to evaluate the vulnerability of water resources in arid regions. We applied this framework to a case study of the Shiyang River Basin in Northwest China. Results showed that the precipitation and streamflow in Shiyang River Basin exhibited no significant trends of change from 1956 to 2010. In the past five decades, however, the temperature increased significantly by 0.37℃ per decade. According to the sensitivity assessment, a 10% in- crease in precipitation and a 1℃ increase in temperature altered mean annual streamflow by averages of 14.6% and -0.5%, respectively, from 1988 to 2005. In the 2000s, the calculated vulnerability of water resources in Shiyang River Basin was more than 0.95, indicating severe vulnerability. The increase in the amount of precipitation and the imple- mentation of water-saving measures can reduce the vulnerability of water resources in the future; if precipitation in- creases by 10% per decade and the use of irrigation water decreases by 15% in the 2030s, the evaluated value of water resources vulnerability will be reduced to 0.79. However, the region remains highly vulnerable. The proposed framework for vulnerability assessment can be applied to the arid regions in Northwest China, and the results of our efforts can identify adaptation strategies and improve the management of water resources in such regions.

关键词： climate change streamflow sensitivity water resources vulnerability arid regions

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外周血单核细胞预测老年重症流感风险模型的建立及靶向中药预测

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中草药 2024年第10期55卷 3420-3432页

作者：黎祖鸣封杰妮符珊珊陈俊旭甘考卢月陈剑坤刘云涛杨荣源李际强黄涛亮广州中医药大学第二临床医学院广东广州510405 广州中医药大学第一临床医学院广东广州510405 广州中医药大学第二附属医院(广东省中医院) 广东广州510120 广东省中医急症研究重点实验室广东广州510120 中医证候全国重点实验室广东广州510120

目的综合分析老年流感单细胞转录组测序(single cell transcriptome sequencing,scRNA-seq)和转录组测序(transcriptome sequencing,RNA-seq)数据集,构建老年重症流感风险预测模型,并预测调控相关免疫细胞群的中药。通过统计分析中药的... 详细信息

目的综合分析老年流感单细胞转录组测序(single cell transcriptome sequencing,scRNA-seq)和转录组测序(transcriptome sequencing,RNA-seq)数据集,构建老年重症流感风险预测模型,并预测调控相关免疫细胞群的中药。通过统计分析中药的性味归经、药物分类,为中医药治疗老年流感提供理论支持。方法通过scRNA-seq和RNA-seq数据集得到具有较高预测能力的老年流感相关免疫细胞群及其关键基因。基因本体生物学过程(gene ontology biological process,GOBP)、标志性基因集(Hallmark gene set)、京都基因与基因组百科全书(Kyoto encyclopedia of genes and genomes,KEGG)和Reactome生物通路知识库富集分析揭示关键基因参与的生物过程及通路。循环算法用于构建老年重症流感风险预测模型。CTD和COREMINE数据库查找对关键基因有调控作用的化学成分及中药,并通过古今医案云平台统计高频中药的性味归经、药物分类。结果单核细胞及其相关基因对于老年流感具有较高的预测能力。老年流感单核细胞相关基因显著富集在感染、代谢和炎症免疫等生物过程及信号通路。5个基因(BCL6、PLSCR1、FCGR1A、RETN、RPL9)的组合可较为准确预测老年重症流感。根据参考文献筛选出42种化学成分,得到高频中药石斛、灵芝、地骨皮、人参、桑叶等;药性以平、寒、温为主;药味以甘、苦、辛为主;归经以肝、脾、肺经居多;以补虚药、清热药、利水渗湿药、解表药、活血化瘀药、消食药、止咳平喘药为主。结论单核细胞可能在老年流感中发挥重要作用。BCL6、PLSCR1、FCGR1A、RETN、RPL9可能是老年重症流感的潜在诊断及治疗靶标。通过生物信息学分析得出老年流感单核细胞相关基因及对应的高频中药,为治疗老年流感的中药新药开发及临床应用提供了新思路。

关键词：老年重症流感单细胞转录组转录组风险预测模型单核细胞石斛灵芝地骨皮人参桑叶

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Assessing canopy nitrogen and carbon content in maize by canopy spectral reflectance and uninformative variable elimination

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The Crop Journal 2022年第5期10卷 1224-1238页

作者： Zhonglin Wang junxu chen Jiawei Zhang Xianming Tan Muhammad Ali Raza Jun Ma Yan Zhu Feng Yang Wenyu Yang College of Agronomy Sichuan Agricultural UniversityChengdu 611130SichuanChina Sichuan Engineering Research Center for Crop Strip Intercropping System Chengdu 611130SichuanChina Rice Research Institute Sichuan Agricultural UniversityChengdu 611130SichuanChina National Engineering and Technology Center for Information Agriculture Nanjing Agricultural UniversityNanjing 210095JiangsuChina

Assessing canopy nitrogen content(CNC) and canopy carbon content(CCC) of maize by hyperspectral remote sensing data permits estimating cropland productivity, protecting farmland ecology, and investigating the nitrogen and carbon cycles in the atmosphere. This study aimed to assess maize CNC and CCC using canopy hyperspectral information and uninformative variable elimination(UVE). Vegetation indices(VIs) and wavelet functions were adopted for estimating CNC and CCC under varying water and nitrogen regimes. Linear, nonlinear, and partial least squares(PLS) regression models were fitted to VIs and wavelet functions to estimate CNC and CCC, and were evaluated for their prediction *** was used to eliminate uninformative variables, improve the prediction accuracy of the models, and simplify the PLS regression models(UVE-PLS). For estimating CNC and CCC, the normalized difference vegetation index(NDVI, based on red edge and NIR wavebands) yielded the highest correlation coefficients(r > 0.88). PLS regression models showed the lowest root mean square error(RMSE) among all models. However, PLS regression models required nine VIs and four wavelet functions, increasing their complexity. UVE was used to retain valid spectral parameters and optimize the PLS regression ***-PLS regression models improved validation accuracy and resulted in more accurate CNC and CCC than the PLS regression models. Thus, canopy spectral reflectance integrated with UVE-PLS can accurately reflect maize leaf nitrogen and carbon status.

关键词： Canopy nitrogen content Canopy carbon content Maize Canopy spectral reflectance Uninformative variable elimination

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Multi-object approach and its appfication to adaptive water management under climate change

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Journal of Geographical Sciences 2017年第3期27卷 259-274页

作者： HONG Si XIA Jun chen junxu WAN Long NING Like SHI Wei Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources Research CAS Beijing 100101 China State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan 430072 China University of Chinese Academy of Sciences Beijing 100049 China School of Resource Environment and Earth Science Yunnan University Kunming 650091 China

This paper addresses issues on adaptive water management under the impact of climate change. Based on a set of comprehensive indicators of water system, a decision making approach of multi-objects is developed and applied to quantify water adaptive man- agement for the demands of water sustainable use, water environmental protection and eco-water requirement under the climate change. For this study in China, two key indicators are proposed, namely （1） the water resources vulnerability （V） that was represented by inte- grated sensitivity （S） and resilience （C） of climate change impact on water resources, and （2） the sustainability of socio-economy and water environment, marked by DD, that is integrated scaler of socio-economic development （EG） based on the amount of GDP and the water en- vironment and relative eco-system quality （LI）. To find a reasonable solution for adaptive water management, a multi-objective decision making model of adaptive water management is further developed and the multi-objective model was transformed into an integrated single optimization model through developing an integrated measure function, called as VDD=DD/V. This approach has been applied to adaptive water resources planning and management for case study of China with new policy, called as the strict management of water resources based on three red line controls, i.e., the control of total water use by the total water re- sources allocation, the control of lower water use efficiency by the water demand manage- ment and the control of the total waste water load by water quality management in the East- ern China Monsoon Region that covers major eight big river basins including Yangtze River, Yellow River, Haihe River and Huaihe River. It is shown that the synthetic representation of water resource vulnerability and socio-economic sustainability by the integrated objective function （VDD） and integrated decision making model are workable and practicable. Adaptive management effect of the

关键词： adaptive water management climate change multi-object vulnerability sustainability VDD

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基于POD方法的二维方柱低雷诺数绕流流场分析研究

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西北工业大学学报 2014年第4期32卷 612-617页

作者：王掩刚陈俊旭先松川西北工业大学动力与能源学院

以二维方柱低雷诺数绕流为研究对象,在非定常数值模拟结果的基础上,首先应用本征正交分解(proper orthogonal decomposition,POD)方法得到特征区域流场的低阶模型,获取POD基函数及时间系数分布规律;其次以POD的低阶模型为基础,实现了对... 详细信息

以二维方柱低雷诺数绕流为研究对象,在非定常数值模拟结果的基础上,首先应用本征正交分解(proper orthogonal decomposition,POD)方法得到特征区域流场的低阶模型,获取POD基函数及时间系数分布规律;其次以POD的低阶模型为基础,实现了对非定常物理场的重构。研究结果表明:1应用文中的数值分析手段,捕捉到了方柱绕流非定常流动特征,且与公开文献结果吻合较好。2对于文中的研究对象,前4阶POD模态所占波动总能量99.4%,可以用于较准确描述其非定常流场特征;3各阶POD模态的时间系数之间都有明确的频率与相位关系,其中能量最大的第一对POD模态对方柱尾迹流动的波动频率和幅值起决定作用。4在所研究的雷诺数下,前4阶POD模态就可以很好地重构流场,这对以后低阶模型的建立有一定的指导意义。

关键词：本征正交分解低阶模型方柱绕流非定常

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多尺度水资源脆弱性评价研究

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应用基础与工程科学学报 2012年第S1期20卷 1-14页

作者：夏军翁建武陈俊旭邱冰武汉大学水资源与水电工程科学国家重点实验室湖北武汉430072 中国科学院地理科学与资源研究所陆地水循环及地表过程重点实验室北京10010 中国科学院大学资源与环境学院北京100049

水资源脆弱性与适应性研究是当前国内外水资源研究的热点之一.本文以陕西、山西为研究区,针对水资源供需矛盾问题,开展了多尺度下水资源脆弱性评价研究.与常见的水资源脆弱性评价不同,本文使用与空间尺度无关的评价指标和函数法评价方法... 详细信息

水资源脆弱性与适应性研究是当前国内外水资源研究的热点之一.本文以陕西、山西为研究区,针对水资源供需矛盾问题,开展了多尺度下水资源脆弱性评价研究.与常见的水资源脆弱性评价不同,本文使用与空间尺度无关的评价指标和函数法评价方法,用于多个尺度的水资源脆弱性评价.初步研究表明,省级行政区尺度有助于把握区域总体水资源脆弱性特征;地级行政区尺度的空间分异比省级行政区明显,部分地级行政区可能对省级行政区评价结果有显著影响;水资源脆弱性大体由南向北升高,评价指标的变化趋势与水资源脆弱性的变化趋势一致;相同或相近的水资源脆弱性评价结果,可能由不同原因造成.根据评价结果,本研究从提高用水效率、实施用水总量控制、开发新水源和治理水污染等方面提出了相应的适应性对策.

关键词：多尺度水资源脆弱性评价函数法

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手刹固定板冲压成形数值模拟

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吉林大学学报（工学版） 2019年第4期49卷 1258-1265页

作者：李欣王丹陈军绪孙延朋谷诤巍徐虹吉林大学材料科学与工程学院长春130022 一汽解放青岛汽车有限公司山东青岛266000

利用有限元模拟软件AutoForm对某车型手刹固定板进行了冲压成形数值模拟,研究了工艺参数对拉延成形质量的影响规律,并分析了原因。采用正交试验优化设计方法进一步优化了工艺参数,并进行了全工序模拟。研究结果表明:在合理设置拉延筋基... 详细信息

利用有限元模拟软件AutoForm对某车型手刹固定板进行了冲压成形数值模拟,研究了工艺参数对拉延成形质量的影响规律,并分析了原因。采用正交试验优化设计方法进一步优化了工艺参数,并进行了全工序模拟。研究结果表明:在合理设置拉延筋基础上,通过优化工艺参数能够有效控制成形件质量。最佳工艺参数条件为:压边力600 kN、凹模圆角半径6mm、凹凸模模具间隙1.50 mm、摩擦因数0.15。通过实际实验验证了模拟结果的正确性,说明利用数值模拟可以有效指导实际生产。

关键词：材料合成与加工工艺手刹固定板 AutoForm 数值模拟多目标优化

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