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One-step fabrication superhydrophobic sand filter for capillary-driven separation of water-in-oil emulsions

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Chinese Journal of Chemical Engineering 2021年第5期34卷 70-75页

作者： Bao Wang chaolang chen Zhaoxin Li Jianfeng Wu Xianglou Liu Jiadao Wang Northeast Petroleum University Daqing 163318China Sate Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China

The efficient separation of water-in-oil emulsion is of significance in environment and energy filed,and it has become a world-wide ***,we have presented a one-step,facile and low-cost approach to prepare superhydrophobic sands for efficient separation of water-in-oil *** as-prepared sand layers possessed a water contact angle higher than 151°,demonstrating their superior superhydrophobic ***,the as-prepared sand layers could separate water-in-emulsions with separation efficiency up to 99.7%,which is superior to both traditional and superwettable filtration *** effect of thickness of sand layer on separation performance was also *** results showed that the filtration flux decreased with the increased of filtration thickness while the separation efficiency *** as-prepared sand layer proposed by this study is a processing candidate for separating water-in-oil emulsion in practical ***,the as-prepared superhydrophobic sand fabrication method also provides an alternative for desert water storage.

关键词： Separation Filtration Superhydrophobic sand Preparation Emulsion

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油水乳化液的边界润滑行为及机理分析

机械工程学报 2019年第9期55卷 48-54页

作者：刘宸旭陈朝浪张继平戴媛静清华大学天津高端装备研究院天津300300 清华大学摩擦学国家重点实验室北京100084

在滑动轴承的实际应用中,难以避免水对润滑油的侵入污染;因此对油水乳化液的润滑研究至关重要。为探索轴承启停过程中油水乳化液的摩擦学行为及规律,研究了不同水含量对于油水混合体系边界润滑性能及磨损状况的影响。发现在含水量低于99... 详细信息

在滑动轴承的实际应用中,难以避免水对润滑油的侵入污染;因此对油水乳化液的润滑研究至关重要。为探索轴承启停过程中油水乳化液的摩擦学行为及规律,研究了不同水含量对于油水混合体系边界润滑性能及磨损状况的影响。发现在含水量低于99.75%的乳化液中轴承钢间的摩擦因数与纯油润滑时相近,但磨损状况较纯油差;综合摩擦因数与磨损量测试,认为含水量为30%的乳化液,其减摩抗磨效果接近纯油润滑的情况。通过黏度和润湿行为的观测,给出了油水乳化液对于润滑作用机制的原理分析。当乳化液进入润滑接触区时,由于液下超疏水性质,水相极易被挤出接触区,而油相则趋向于在试样表面润湿,从而形成润滑油膜,起到承载和润滑效果。

关键词：油包水水包油乳化液边界润滑摩擦磨损

新媒体背景下乡村特色产业发展研究--以昭通天麻为例

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艺术科技 2021年第11期34卷 124-125页

作者：陈朝朗贵州大学公共管理学院贵州贵阳550025

互联网时代的到来使各种新媒体欣欣向荣,同时新媒体技术的深入应用也为乡村产业发展带来契机,成为推动乡村振兴不可忽视的潜在力量,特别是在昭通等偏远山区,新媒体不仅赋能广大农户技术知识,同时为带领农户脱贫致富带来新希望。本文以... 详细信息

互联网时代的到来使各种新媒体欣欣向荣,同时新媒体技术的深入应用也为乡村产业发展带来契机,成为推动乡村振兴不可忽视的潜在力量,特别是在昭通等偏远山区,新媒体不仅赋能广大农户技术知识,同时为带领农户脱贫致富带来新希望。本文以昭通天麻产业发展为例,从新媒体助力昭通天麻产业发展中的应用角度入手,分析新媒体技术对乡村特色产业的作用与不足,进而基于该案例实践从人才培养、完善基础设施建设和品牌创新等方面进行策略探析,对促进新媒体进一步助推乡村特色产业振兴具有一定的理论和实践意义。

关键词：新媒体昭通天麻乡村特色产业

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Profile of *** chen

Science China(Life Sciences) 2024年第10期67卷 2062-2063页

作者： chen, Songlin Yellow Sea Fisheries Res Inst Qingdao Peoples R China

For decades,*** has been engaged in fish germplasm preservation,sex control and research focusing on molecular breeding for disease *** discovered the first sex-specific molecular marker of fish(chen et al.,2007),deciphered the first fish genome(Chinese tongue sole)in China,revealed the sex determination mechanism in fish(chen et al.,2014),and created molecular sex control *** also discovered the molecular mechanism of metamorphosis in flatfish(Shao et al.,2017)and developed China's first fish disease-resistant breeding gene chip,“YUXIN No.1”.

关键词： technology breeding

Effect of Reclamation on the Groundwater-Lake Water Interaction in chen Lake

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Journal of Earth Science 2024年第3期35卷 1083-1086页

作者： Kun Lei Teng Ma Liuzhu chen Zhenxing Li Yu chen School of Environmental Studies State Key Laboratory of Biogeology and Environmental GeologyChina University of GeosciencesWuhan 430078China

0 INTRODUCTION To relieve the short supply of suitable land for residing,cultivating,and commerce,it is accepted to reclaim land from lakes,river estuaries,and coastal regions in many countries(Mancini et al.,2020).The large-scale reclamation activities have an irreversible effect on the mico-geomorphology and hydrodynamic system of seasonally flooded areas(Zhang et al.,2019;Yu et al.,2018).For example,coastal regions reclaimed extended the groundwater flow paths,as well as created groundwater level rise,resulting in water-logging in the reclaimed area(Hu et al.,2008).Similar changes in groundwater flow systems may alter groundwater-lake water interactions,and it can ultimately affect the water cycle in the lake ***,such detailed studies are presently *** addition,natural exchanges between the lake and groundwater systems can be strongly affected by physical hydrological processes(Javadzadeh et al.,2020),chemical properties(Kamtchueng et al.,2015),and bioto behavior(Hancock et al.,2005).

关键词： groundwater coastal logging

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浅谈燃油加油机强制检定的风险管控

计量与测试技术 2022年第2期49卷 52-53页

作者：张东飞陈曹浪苏州市计量测试院

针对燃油加油机强制检定中容易忽视的问题,文中从检定机构的工作角度详细分析燃油加油机检定的业务受理、能力建设、检定过程和数据上报等环节,并给出了减少检定风险的建议,旨在将燃油加油机的计量检定风险降至可控的范围内。

关键词：燃油加油机强制检定风险管控

Meridional deflection of global eddy propagation derived from tandem altimetry: Mechanism and implication

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Science China Earth Sciences 2024年第3期67卷 811-825页

作者： Ge chen Xiaoyan chen Frontiers Science Center for Deep Ocean Multispheres and Earth System School of Marine TechnologyOcean University of ChinaQindao 266100China Laboratory for Regional Oceanography and Numerical Modeling Laoshan LaboratoryQindao 266237China

A common view on meridional deflection of eddy propagation is poleward for cyclones and equatorward for anticyclones. This widely accepted polarity-sensitive pattern has been increasingly undermined given that it is systematically violated on both zonal and regional scales as recently reported. Here, we approach the problem by exploring these violations in terms of eddy effects of spatiotemporal geostrophy, thermal fading, and flow dragging, yielding the following main conclusions.(1) The polarity-dependent deflection discrepancy is a pseudo feature resulting from a biased fit to the normalized eddy tracks which are spatially asymmetric(though azimuthally symmetric) between the two signs;Instead, the primary pattern of eddy deflection appears to be geographically correlated and polarity independent.(2) Geostrophic adjustment plays a critical role in defining the meridional movement of an eddy. Specifically, a consistent poleward(equatorward) trajectory bending of spatially(temporally) ageostrophic eddies is observed irrespective of their polarity.(3) The mechanism of eddy deflection is also determined by its zonal propagation direction. Westward propagating eddies are substantially affected by thermal fading, while opposite ones by flow dragging. A realistic and comprehensive understanding of eddy deflection mechanisms serves as a significant contribution to the prediction of eddy trajectory, and the protection of ocean environment.

关键词： Mesoscale eddies Eddy propagation Eddy meridional deflection Satellite observation Geostrophic adjustment

A refined representation method of the particle size distribution curve based on grading entropy

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Particuology 2024年第5期88卷 302-311页

作者： Xing Li Qun chen Zhaozhao Liu cheng Zhou chen Wang chen chen State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065China

The particle size distribution(PSD)curve is an important expression of the basic properties of the *** characteristic parameters such as median particle size D_(50),effective particle size D_(10),and some combinations of characteristic parameters can only represent some points of the PSD curve,failing to represent all information of the PSD *** this paper,a fraction characteristic parameter F that could reflect the fraction size variation of the PSD curve was introduced based on grading *** a new presentation method of the A-B-F three parameters was proposed for a refined representation of the PSD *** was found that the newly constructed model not only better represents the differences in the width of PSD curves but also has a higher sensitivity than the A-B two-parameter model proposed by Lő*** PSD curves with similar distributions,the new presentation method has a higher degree of discrimination than that of the D_(50)-C_(u)-C_(c) three-parameter or the four-parameter combination G_(c) proposed by ***,the application of this new method in describing the spatial nonuniformity distribution of depositions and predicting the soil hydraulic conductivity was *** research results can provide a reference for the refined representation of PSD curves.

关键词： Grading entropy Particle size distribution curve Refined representation

Track correlation algorithm based on CNN-LSTM for swarm targets

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Journal of Systems Engineering and Electronics 2024年第2期35卷 417-429页

作者： chen Jinyang WANG Xuhua chen Xian Research Institute for National Defense Engineering Academy of Military SciencesLuoyang 471023China Information Engineering University Zhengzhou 450001China School of Computer Science and Technology Xidian UniversityXi’an 710071China

The rapid development of unmanned aerial vehicle(UAV) swarm, a new type of aerial threat target, has brought great pressure to the air defense early warning system. At present, most of the track correlation algorithms only use part of the target location, speed, and other information for *** this paper, the artificial neural network method is used to establish the corresponding intelligent track correlation model and method according to the characteristics of swarm ***, a route correlation method based on convolutional neural networks (CNN) and long short-term memory (LSTM)Neural network is designed. In this model, the CNN is used to extract the formation characteristics of UAV swarm and the spatial position characteristics of single UAV track in the formation,while the LSTM is used to extract the time characteristics of UAV swarm. Experimental results show that compared with the traditional algorithms, the algorithm based on CNN-LSTM neural network can make full use of multiple feature information of the target, and has better robustness and accuracy for swarm targets.

关键词： track correlation correlation accuracy rate swarm target convolutional neural network(CNN) long short-term memory(LSTM)neural network