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Low-viscosity oligoether esters(OEEs)as high-efficiency lubricating oils:Insight on their structure‒lubricity relationship

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Friction 2024年第6期12卷 1133-1153页

作者： Hanwen WANG Ying WANG Ping WEN Lin MA Mingjin FAN rui dong Chunhua ZHANG Shaanxi Key Laboratory of Phytochemistry College of Chemistry&Chemical EngineeringBaoji University of Arts and SciencesBaoji 721013China Key Laboratory of Shaanxi Province for Development and Application of New Transportation Energy Chang’an UniversityXi’an 710064China

Development of energy-efficient lubricants is a way to reduce energy consumption for transportation,with the tendency to design molecules that are beneficial in reducing the viscosity of synthetic *** esters(OEEs),as a low-viscosity ester base oil,have characteristics such as simple synthesis and excellent lubrication effect;however,the application of OEEs in tribology field has rarely been *** objective of the present study is to investigate the effect of structure on the lubricating performance of OEEs and to develop a predictive model for OEEs based on quantitative structure‒property relationship(QSPR)through a combination of experiment and statistical *** showed that glycol chains contribute positively to lubrication with the ether functional groups increasing the sites of *** to branched-chain OEEs,straight-chain OEEs exhibited reduced wear,which was mainly due to the thicker adsorption film formed by the straight-chain ***,carbon films were detected on lightly worn surfaces,indicating that OEEs underwent oxidation during the friction *** on the results of principal component analysis(PCA)and partial least squares(PLS),it could be found that the predictive models of viscosity‒temperature performance,thermal stability performance,coefficient of friction(COF),and wear volume(WV)performed well and *** them,COF and WV can be best predicted with an R^(2) of about 0.90.

关键词： oligoether esters(OEEs) low-viscosity ester friction wear quantitative structure-property relationship(QSPR)

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A novel polyionic liquid with lubricity and viscosity-increasing dual functionalities as the additive in aqueous lubrication system

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Friction 2024年第4期12卷 698-710页

作者： Bo YU Kun ZOU rui WANG Qiang CHEN rui dong Xiao LIU Jiaying ZHANG Wenquan LV Qiangliang YU Meirong CAI Feng ZHOU College of Science Nanjing Forestry UniversityNanjing 210037China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai 264006China Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering Yantai 264006China Institute of Polymer Materials Nanjing Forestry UniversityNanjing 210037China

The polyionic liquid poly-PEGMA-r-METAC(PPM)with quaternary ammonium has been synthesized and evaluated as additive in aqueous lubricating *** rheological behavior of aqueous lubricating fluids with PPM has been characterized to confirm PPM’s function as a viscosity *** tribological behavior of aqueous lubricating fluids with PPM has been investigated on SRV-V and MTM testing *** was found that PPM has excellent viscosity-increasing,lubricating,and anti-wear properties as an additive for aqueous,which can be attributed to the ability of PPM to form the protective film and boundary tribofilm generated from complex tribochemical reaction on rubbing *** obtained PPM with dual functions of anti-corrosion additives and viscosity index improver can play an important role in diverse lubrication regimes.

关键词： polyionic liquid lubricant additives viscosity modifier lubrication regime

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Age of Information Based User Scheduling and Data Assignment in Multi-User Mobile Edge Computing Networks:An Online Algorithm

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China Communications 2024年第5期21卷 153-165页

作者： Ge Yiyang Xiong Ke dong rui Lu Yang Fan Pingyi Qu Gang School of Computer and Information Technology Beijing Jiaotong UniversityBeijing 100044China Engineering Research Center of Network Management Technology for High Speed Railway of Ministry of Education Beijing 100044China Beijing Engineering Research Center of High-speed Railway Broadband Mobile Communications Beijing 100044China Department of Electronic Engineering Tsinghua UniversityBeijing 100084China Beijing National Research Center for Information Science and Technology Tsinghua UniversityBeijing 100084China Department of Electrical and Computer Engineering College ParkMarylandUSA

This paper investigates the age of information(AoI)-based multi-user mobile edge computing(MEC)network with partial offloading *** weighted sum AoI(WSA)is first analyzed and derived,and then a WSA minimization problem is formulated by jointly optimizing the user scheduling and data *** to the non-analytic expression of the WSA *** optimization variables and the unknowability of future network information,the problem cannot be solved with known solution ***,an online Joint Partial Offloading and User Scheduling Optimization(JPOUSO)algorithm is proposed by transforming the original problem into a single-slot data assignment subproblem and a single-slot user scheduling sub-problem and solving the two sub-problems *** analyze the computational complexity of the presented JPO-USO algorithm,which is of O(N),with N being the number of *** results show that the proposed JPO-USO algorithm is able to achieve better AoI performance compared with various baseline *** is shown that both the user’s data assignment and the user’s AoI should be jointly taken into account to decrease the system WSA when scheduling users.

关键词： age of information(aoi) mobile edge computing(mec) user scheduling

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Lateral root elongation in maize is related to auxin synthesis and transportation mediated by N metabolism under a mixed NO_(3)^(–) and NH_(4)^(+) supply

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Journal of Integrative Agriculture 2024年第3期23卷 1048-1060页

作者： Peng Wang Lan Yang Xichao Sun Wenjun Shi rui dong Yuanhua Wu Guohua Mi Key Laboratory of Tobacco Biology and Processing of Ministry of Agriculture and Rural Affairs Tobacco Research InstituteChineseAcademy of Agricultural SciencesQingdao 266101China Department of Plant Nutrition College of Resources and Environmental SciencesChina Agricultural UniversityBeijing 100193China College of Resources Hunan Agricultural UniversityChangsha 410128China Agro-Environmental Protection Institute Ministry of Agriculture and Rural AffairsTianjin 300191China

A mixed nitrate (NO_(3)^(–)) and ammonium (NH_(4)^(+)) supply can promote root growth in maize (Zea mays),however,the changes in root morphology and the related physiological mechanism under different N forms are still ***,maize seedlings were grown hydroponically with three N supplied in three different forms (NO_(3)^(–)only,75/25 NO_(3)^(–)/NH_(4)^(+)and NH_(4)^(+)only).Compared with sole NO_(3)^(–)or NH_(4)^(+),the mixed N supply increased the total root length of maize but did not affect the number of axial *** main reason was the increased total lateral root length,while the average lateral root (LR) length in each axle was only slightly *** addition,the average LR density of 2nd whorl crown root under mixed N was also *** with sole nitrate,mixed N could improve the N metabolism of roots (such as the N influx rate,nitrate reductase (NR) and glutamine synthase (GS)enzyme activities and total amino content of the roots).Experiments with exogenously added NR and GS inhibitors suggested that the increase in the average LR length under mixed N was related to the process of N assimilation,and whether the NR mediated NO synthesis participates in this process needs further ***,an investigation of the changes in root-shoot ratio and carbon (C) concentration showed that C transportation from shoots to roots may not be the key factor in mediating lateral root elongation,and the changes in the sugar concentration in roots further proved this ***,the synthesis and transportation of auxin in axial roots may play a key role in lateral root elongation,in which the expression of ZmPIN1B and ZmPIN9 may be involved in this *** study preliminarily clarified the changes in root morphology and explored the possible physiological mechanism under a mixed N supply in maize,which may provide some theoretical basis for the cultivation of crop varieties with high N efficiency.

关键词： maize NO_(3)^(–)/NH_(4)^(+)ratio lateral root elongation N assimilation indole-3-acetic acid

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Ice-Induced Vibrational Response of Single-Pile Offshore Wind-Turbine Foundations

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Fluid Dynamics & Materials Processing 2024年第3期20卷 625-639页

作者： Zhoujie Zhu Gang Wang Qingquan Liu Guojun Wang rui dong Dayong Zhang Department of Renewable Energy Engineering PowerChina Huadong Engineering Corporation LimitedHangzhou311122China School of Ocean Science and Technology Dalian University of TechnologyPanjin124221China Ningbo Institute of Dalian University of Technology Ningbo315000China

Important challenges must be addressed to make wind turbines sustainable renewable energy sources.A typical problem concerns the design of the *** the pile diameter is larger than that of the jacket platform,traditional mechanical models cannot be *** this study,relying on the seabed soil data of an offshore wind farm,the m-method and the equivalent embedded method are used to address the single-pile wind turbine foundation problem for different pile *** approach to determine the equivalent pile length is also proposed *** results provide evidence for the effectiveness and reliability of the model based on the equivalent embedded method.

关键词： Wind turbine ice-induced vibration dynamic response equivalent embedded method

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Progress in Biomarkers Related to Biliary Atresia

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Journal of Clinical and Translational Hepatology 2024年第3期12卷 305-315页

作者： Fanyang Kong rui dong Gong Chen Song Sun Yifan Yang Jingying Jiang Lingdu Meng Huifen Chen Jiajie Zhu Shan Zheng Department of Pediatric Surgery Children’s Hospital of Fudan UniversityShanghai Key Laboratory of Birth Defectand Key Laboratory of Neonatal DiseaseMinistry of HealthShanghaiChina

Biliary atresia(BA)is a congenital cholestatic disease that can seriously damage children’s liver *** is one of the main reasons for liver transplantation in *** diagnosis of BA is crucial to the prognosis of patients,but there is still a lack of reliable non-invasive diagnostic ***,as some children are in urgent need of liver transplantation,evaluating the stage of liver fibrosis and postoperative native liver survival in children with BA using a straightforward,efficient,and less traumatic method is a major focus of *** recent years,an increasing number of BA-related biomarkers have been identified and have shown great potential in the following three aspects of clinical practice:diagnosis,evaluation of the stage of liver fibrosis,and prediction of native liver *** review focuses on the pathophysiological function and clinical application of three novel BA-related biomarkers,namely MMP-7,FGF-19,and ***,progress in well-known biomarkers of BA such as gamma-glutamyltransferase,circulating cytokines,and other potential biomarkers is discussed,aiming to provide a reference for clinical practice.

关键词： Biliary atresia Biomarkers Diagnosis Liver fibrosis Native liver survival

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Skyway:Accelerate Graph Applications with a Dual-Path Architecture and Fine-Grained Data Management

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Journal of Computer Science & Technology 2024年第4期39卷 871-894页

作者： Mo Zou Ming-Zhe Zhang Ru-Jia Wang Xian-He Sun Xiao-Chun Ye dong-rui Fan Zhi-Min Tang Institute of Computing Technology Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Institute of Information Engineering Chinese Academy of SciencesBeijing 100045China Department of Computer Science Illinois Institute of TechnologyChicagoIL 60616U.S.A.

Graph processing is a vital component of many AI and big data ***,due to its poor locality and complex data access patterns,graph processing is also a known performance killer of AI and big data *** this work,we propose to enhance graph processing applications by leveraging fine-grained memory access patterns with a dual-path architecture on top of existing software-based graph *** first identify that memory accesses to the offset,edge,and state array have distinct locality and impact on *** then introduce the Skyway architecture,which consists of two primary components:1)a dedicated direct data path between the core and memory to transfer state array elements efficiently,and 2)a data-type aware fine-grained memory-side row buffer hardware for both the newly designed direct data path and the regular memory hierarchy data *** proposed Skyway architecture is able to improve the overall performance by reducing the memory access interference and improving data access efficiency with a minimal *** evaluate Skyway on a set of diverse algorithms using large real-world *** a simulated fourcore system,Skyway improves the performance by 23%on average over the best-performing graph-specialized hardware optimizations.

关键词： graph application computer architecture memory hierarchy

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瑞鹤仙:北宋州桥石壁雕刻的建造与主题

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美术研究 2024年第2期 30-32,41-45页

作者：董睿河南大学美术学院 475001

考古出土的开封州桥及附近汴河遗址包括明代砖石结构桥体和北宋石壁两部分,北宋石壁发现了保存完好的由海马、仙鹤和祥云组成的巨型雕刻,是北宋具有纪念碑性的建筑和雕刻艺术,代表了北宋皇家艺术的最高成就。州桥始建于哲宗绍圣四年(109... 详细信息

考古出土的开封州桥及附近汴河遗址包括明代砖石结构桥体和北宋石壁两部分,北宋石壁发现了保存完好的由海马、仙鹤和祥云组成的巨型雕刻,是北宋具有纪念碑性的建筑和雕刻艺术,代表了北宋皇家艺术的最高成就。州桥始建于哲宗绍圣四年(1097),州桥石壁雕刻艺术深刻体现了宋哲宗的治国理念:一方面借此工程表达其向熙丰变法的回归,另一方面以州桥恢弘的气势和在都城核心的位置体现其亲政的宣示。

关键词：州桥海马仙鹤汴河宋画

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机器人类脑智能研究综述

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自动化学报 2024年第8期50卷 1485-1501页

作者：王瑞东王睿张天栋王硕中国科学院自动化研究所多模态人工智能系统全国重点实验室北京100190 中国科学院大学人工智能学院北京100049

传统机器人经过长时间的研究和发展,已经在生产和生活的多个领域得到了广泛的应用,但在复杂多变的环境中依然缺乏与真实生物类似的灵活性、稳定性和适应能力.类脑智能作为一种新型的机器智能,使用计算建模的方法模拟生物神经系统的各类... 详细信息

传统机器人经过长时间的研究和发展,已经在生产和生活的多个领域得到了广泛的应用,但在复杂多变的环境中依然缺乏与真实生物类似的灵活性、稳定性和适应能力.类脑智能作为一种新型的机器智能,使用计算建模的方法模拟生物神经系统的各类特性,进而实现对各类信息的推理和决策,近年来受到了学术界的广泛关注.鉴于此,综述了国内外面向机器人系统的类脑智能研究现状,并对类脑智能方法在机器人感知、决策和控制三个研究方向的成果进行了整理、归纳和分析,最后从软硬件层面分别指出了机器人类脑智能目前存在的主要问题和未来的发展方向.

关键词：机器人类脑机器人类脑智能脉冲神经网络

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Unique anti-angiogenic effects,pharmacological targets and therapeutic mechanisms of Chinese herbal medicines for endometriosis

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Genes & Diseases 2024年第5期11卷 63-65页

作者： Bo Liang rui dong Sze Wan Hung Yiran Li Yuezhen Lin Ling Wu Tao Zhang Gene Chi Wai Man Hui Xu Jacqueline Pui Wah Chung Chi Chiu Wang Guangdong Provincial Key Laboratory of Marine Biotechnology Institute of Marine SciencesShantou UniversityShantouGuangdong 515063China Department of Obstetrics and Gynaecology The Chinese University of Hong KongHong Kong SARChina Reproduction and Development Laboratory Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong SARChina School of Biomedical Sciences The Chinese University of Hong KongHong Kong SARChina Chinese University of Hong Kong-Sichuan University Joint Laboratory in Reproductive Medicine The Chinese University of Hong KongHong Kong SARChina

Endometriosis is a common and benign angiogenesisdependent gynecological disorder,which refers to the proliferation and growth of endometrium-like tissues with neovasculature formation outside of the uterus.1 Available medical treatments for endometriosis containing hormonal and non-hormonal treatments had been limited for longterm usage by their side effects.2 Ideal medical treatment for endometriosis with efficacy to relieve symptoms and suppress endometriotic lesion growth and minimal side effects has been longing for decades.3 Angiogenesis is a promising therapeutic target for endometriosis.

关键词： therapeutic endometriosis herbal

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