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Synthesis and Performance of an Associative Anti-shear drag reducer Based on Hydrogen Bond Association of dodecyl Methacrylate

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China Petroleum Processing & Petrochemical technology 2023年第1期25卷 23-33页

作者： Lu Yong Li Chenhao Li Hao Chen Yue Xu dan Wang Yiran Meng Yeqiao Zhang Xiaolai School of Chemistry and Chemical Engineering Shandong UniversityJinan 250061China PipeChina Eastern China Crude Oil Storage and Transportation Co. Ltd.Science and Technology R&D CenterXuzhou 221008China Shandong Dongyue Polymer Material Co. Ltd.Zibo 256401China State Key Lab of Fluorinated Functional Membrane Materials Zibo 256401China

Using K2S2O8-Na2SO3 as the redox initiation system,a hydrogen-bond-association-based dodecyl methacrylate system associative anti-shear drag reducer was synthesised by standard emulsion *** reaction process was simple and gentle as well as safe and *** design was carried out using molecular dynamics simulation *** results of infrared spectroscopy,thermogravimetric analysis,differential scanning calorimetry,gel chromatography,and laser light scattering showed that the reaction polymerisation was relatively complete,the product was uniform,the molecular weight distribution was controllable,and the synthesised polymer had good *** donor lauryl methacrylate-styrene-methacrylic acid(LMA-St-MAA)and acceptor lauryl methacrylate-styrene-dimethylaminoethyl methacrylate(LMA-St-dMA)polymers had an associative intermolecular interaction force,which increased the molecular cluster size of the associative system *** complex had good shear resistance,and the test results of the tube pump shear test showed that the synthesised associative oil-soluble polymer drag reduction system exhibited better drag reduction rate performance than poly-α-olefins over repeated *** research results provide a reference plan for minimising the number of station-to-station inputs,thereby ensuring the stability of oil pipelines and reducing transportation costs.

关键词： drag reducer associative effect drag reduction rate shear resistance

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diversified Critical-Scenario-Search for defect detection of Autonomous driving System

IEEE Transactions on Intelligent Vehicles

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IEEE Transactions on Intelligent Vehicles 2024年 1-15页

作者： Xie, Yizhou Zhang, Yong Yin, Chengliang Huang, Hongcheng dai, Kunpeng National Engineering Laboratory for Automotive Electronic Control Technology Shanghai Jiao Tong University Shanghai China Shanghai Intelligent and Connected Vehicle R&D Center Shanghai China

Scenario-based test is recognized as an effective way to evaluate and verify the Safety of the Intended Functionality (SOTIF) of an autonomous driving system, and a critical-scenario is beneficial to foreground the system defect more obviously. However, for the state of the art, time consumption of critical-scenario-search in a real-time test is still high, especially for searching critical-scenarios with dissimilarities, which assists designers in discovering more failure modes of autonomous in limited time. To address above challenges, in this paper, we improve our previous scenario-searching approach considering dissimilarity assessments in iterations, we present a searching framework which combines control and exploration approaches, and implement the efficient evolution of scenarios with a backward target-tree search. We carry out a Vehicle-in-the-Loop (VIL) test with a real vehicle to verify our new approach, and the results show that the approach is able to search for scenarios directly against a black-box system in a real-time test, and achieve scenarios with both high criticality and dissimilarity, including unknown-unsafe cases. In our time-limited test, compared with different methods, our approach can achieve 1.9 times the amount of diversified scenarios with the almost same (slightly higher) criticality, either achieve 1.5 times the amount attached with 75% improvement in criticality. IEEE

关键词： real time systems

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Network View and Cognitive Mechanism for Virtual Network resource Management Based Intelligent

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Chinese Journal of Electronics 2025年第3期23卷 574-578页

作者： Xiaochun Wu Chunming Wu Bin Wang Yaguan Qian Julong Lan Computer Science College Zhejiang University Hangzhou China Institute of Network and Communication Engineering Zhejiang Gongshang University Hangzhou China National Digital Switching System Engineering & Technology R&D Center Zhengzhou China

Network virtualization has been a particularly important driving force behind the development of NGN. Finding effective ways to control self-adapting virtual networks has become a research hot spot. This paper tries to find an efficient way in combining dynamic resource sensing with traffic character and requirements in virtual network, based on that an intelligent cognition based virtual network resources management model has been put forward. We design a network topology view by coloring network topology matrix with current resources model. We present an intelligent virtual resource management mechanism based on the proposed network topology view. Experiment results illustrate that the proposed mechanism can improve VN capacity by automatic resource adjust-ment, which can obtain high utilization of VN resources without increasing computational expenses.

关键词： Technological innovation Network topology Computational modeling Force dynamics Network resource management dynamic scheduling Sensors Virtualization Next generation networking

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designing Organic Material Electrodes for Lithium-Ion Batteries:Progress,Challenges,and Perspectives

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Electrochemical Energy reviews 2024年第1期7卷 484-527页

作者： Qiyu Wang Thomas O’Carroll Fengchun Shi Yafei Huang Guorong Chen Xiaoxuan Yang Alena Nevar Natallia dudko Nikolai Tarasenko Jingying Xie Liyi Shi Gang Wu dengsong Zhang Research Center of Nano Science and Technology College of SciencesShanghai UniversityShanghai 200444China State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power SourcesShanghai 200245China Department of Chemical and Biological Engineering University at BuffaloThe State University of New YorkBuffaloNY 14260USA B.I.Stepanov Institute of Physics National Academy of Sciences of Belarus 220072 MinskBelarus Head of the Inter-University R&D Marketing Centre Science and Technology Park of BNTU 220013 MinskBelarus Shanghai University(Zhejiang·Jiaxing)Emerging Industries Institute Jiaxing 314006ZhejiangChina

Organic material electrodes are regarded as promising candidates for next-generation rechargeable batteries due to their environmentally friendliness,low price,structure diversity,and flexible molecular structure ***,limited reversible capacity,high solubility in the liquid organic electrolyte,low intrinsic ionic/electronic conductivity,and low output voltage are the main problems they face.A lot of research work has been carried out to explore comprehensive solutions to the above problems through molecular structure design,the introduction of specific functional groups and specific molecular frameworks,from small molecules to polymer molecules,metal-organic frameworks(MOFs),covalent organic frameworks(COFs)and heterocyclic molecules;from simple organic materials to organic composites;from single functional groups to multi-functional groups;*** inevitable relationship between various molecular structure design and enhanced electrochemical properties has been illustrated in *** work also specifically discusses several approaches for the current application of organic compounds in batteries,including interfacial protective layer of inorganic metal oxide cathode,anode(metal lithium or silicon)and solid-state electrolyte,and host materials of sulfur cathode and redox media in lithium-sulfur *** overview provides insight into a deep understanding of the molecular structure of organic electrode materials(OEMs)and electrochemical properties,broadens people’s research ideas,and inspires researchers to explore the advanced application of electroactive organic compounds in rechargeable batteries.

关键词： Organic electrode materials Lithium-ion batteries Molecular structure design rechargeable batteries

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Effects of heat treatments on microstructures of TiAl alloys

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International Journal of Minerals,Metallurgy and Materials 2022年第6期29卷 1225-1230页

作者： Wen Yu Jianxin Zhou Yajun Yin Zhixin Tu Xin Feng Hai Nan Junpin Lin Xianfei ding State Key Laboratory of Materials Processing and Die and Mould Technology Huazhong University of Science and TechnologyWuhan 430074China Cast Titanium Alloy R&D Center Beijing Institute of Aeronautical MaterialsBeijing 100095China Beijing Engineering Research Center of Advanced Titanium Alloy Precision Forming Technology Beijing 100095China Beijing Institute of Aeronautical Materials Co. Ltd.Beijing 100094China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

This study aims to investigate the effects of heat treatments on the microstructure ofγ-TiAl *** Ti-47Al-2Cr-2Nb alloy ingots were manufactured by casting method and then heat-treated in two types of heat *** microstructures were studied by both optical and scanning electron *** chemical compositions of two ingots were determined as *** ingot with lower Al content only obtains lamellar structures while the one higher in Al content obtains nearly lamellar and duplex structures after heat treatment within1270 to 1185℃.A small amount of B2 phase is found to be precipitated in both as-cast and heat-treated *** are distributed at grain boundaries when holding at a higher temperature,such as 1260℃.However,B2 phase is precipitated at grain boundaries and in colony interiors simultaneously after heat treatments happened at 1185℃.Furthermore,the effects of heat treatments on grain refinement and other microstructural parameters are discussed.

关键词： TiAl alloys microstructure heat treatment casting

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A Hardware-Friendly AVS3 Entropy decoder Architecture for 8K Ultra-High-definition Video

A Hardware-Friendly AVS3 Entropy Decoder Architecture for 8K...

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data Compression Conference (dCC)

作者： Jiaqi Zhang Xu Han Chuanmin Jia Shanshe Wang Siwei Ma National Engineering Research Center of Visual Technology School of Computer Science Peking University China Wangxuan Institute of Computer Technology Peking University China Information Technology R&D Innovation Center of Peking University China

ISBN: (数字)9798331534714

ISBN: (纸本)9798331534721

Logarithmic binary arithmetic coding (LBAC) is a entropy coding method first introduced in AVS2 and now used in the third generation of audio video coding standard (AVS3). While LBAC provides high coding efficiency, the data dependencies in AVS3 make it challenging to parallelize parsing syntax element. To enhance the throughput of AVS3 LBAC entropy decoding engine, a sophisticated hardware implementation architecture is meticulously designed in the paper. The proposed method decouples the bitstream decoding process into four distinct modules. To ensure the decoding efficiency and performance, an advanced parallel pipeline is carefully designed. Furthermore, we develop sub-branch state prediction mechanism and grouped decoding method to further improve the decoding efficiency. The proposed AVS3 entropy decoder has been implemented on the S10 FPGA System Board, and experimental results show that the proposed method could achieve real-time and seamless decoding efficiency for 8K AVS3 bitstreams, even at bitrates as high as 207.1Mbps.

关键词： Video coding Syntactics Streaming media Throughput Entropy real-time systems decoding Field programmable gate arrays Standards Binary sequences

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design and Implementation of 3d Visual System Based on Cloud rendering 22

Design and Implementation of 3D Visual System Based on Cloud...

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Proceedings of the 2022 6th International Conference on Electronic Information technology and Computer engineering

作者： Juanjuan Zhong Jiewei Li Hengyu Jin R&D Center Insigma Technology Co. Ltd China Engineering Technology Center Hong Kong Zhuhai Macao Bridge Authority China

ISBN: (纸本)9781450397148

In order to fix the problem of running large-scale 3d visual system in non-professional graphics workstations of low computing power equipment such as mobile phones, light laptops, tablet computers and integrated display desktops, this paper proposes a solution based on cloud rendering. This paper mainly studies the underlying principle of cloud rendering, the overall structure design, and specific modules such as control center service, process control service and rendering services. Finally, we also studied the implementation of lightweight front-end rendering SdK.

关键词：

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Process Planning Generation for reconfigurable Manufacturing Systems Based on Improved Squirrel Search Algorithm

Process Planning Generation for Reconfigurable Manufacturing...

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Advanced Algorithms and Control engineering (ICAACE), International Conference on

作者： dong Li Jiping Yang Xiaorong Gong Qing Xia College of Advanced Manufacturing Engineering Chongqing University of Posts and Telecommunications Chongqing China Technology R&D Center Chongqing Institute of CEPREI Industrial Technology Chongqing China

ISBN: (数字)9798350361445

ISBN: (纸本)9798350361452

The concept of reconfigurable manufacturing has emerged in response to the need to adapt to the rapidly evolving market environment and meet the growing demands for personalization and customization in manufacturing. reconfigurable Manufacturing Systems (rMS) are designed to combine the cost-efficiency features of rigid manufacturing systems with the agility to respond swiftly to market changes, similar to flexible manufacturing systems. Within the field of rMS research, process planning has consistently been recognized as a crucial aspect and a key technological focus. This paper addresses the process planning problem in reconfigurable manufacturing systems and proposes a multi-objective integer programming model. An improved squirrel search algorithm is also proposed to solve the problem. Firstly, the squirrel search algorithm is combined with the Pareto dominance theory to generate non-dominant solutions. Secondly, an adaptive predator presence probability strategy is proposed, which changes the predator probability from a fixed value to a decreasing value during the iteration process. This strategy aims to balance the global and local search of the algorithm. Finally, to enhance the algorithm's local search capabilities and prevent it from converging to local optima in the later stages, a random mutation strategy is employed. Additionally, the TOPSIS method is utilized to aid decision-makers in ranking and selecting the most optimal process plans. To validate the feasibility and practicality of the proposed model and new algorithm, numerical experiments were conducted. The results of the experiments demonstrate the superior performance of the algorithm presented in this paper.

关键词： Measurement Integer programming Adaptation models Heuristic algorithms Process planning reinforcement learning Search problems

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Study on the Characteristics of High Face rockfill dam Construction Materials Based on Large Scale In-Situ Mechanical Tests 11

Study on the Characteristics of High Face Rockfill Dam Const...

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11th Academic Conference of Geology resource Management and Sustainable development 2023

作者： di, Shengjie Yin, Haocheng Zhang, Ying Su, Chao Northwest Engineering Corporation Limited Power China Shanxi Xi'an710065 China College of Water Conservancy and Hydropower Engineering Hohai University Jiangsu Nanjing210098 China High Slope and Geological Hazard Research & Management branch National Energy and Hydropower Engineering Technology R&D Center Shanxi Xi'an710065 China

ISBN: (纸本)9781713890973

The current engineering practice of high-core wall earth and rock dams shows that the existing dam stress and deformation calculation prediction value and the actual monitoring data of the dam have certain gaps, the research on engineering characteristics of earth dam construction materials is far from perfect. After studying and summarizing the construction experience of the existing high earth-rockfill dam, the foundation of solving the key technical problems of high rockfill dam is to study the material source of dam construction, the engineering characteristics of dam construction materials and the constitutive calculation model used in theoretical analysis. In this paper, large-scale in-situ mechanical test technology is used to carry out large-scale in-situ mechanical test based on the dam rockfill of Zihaxia Project of the Yellow river, and the test results are analysed and studied. According to the test results, a numerical test model is established for scaling effect analysis, and the model parameters are modified. The results show that the test technology has good engineering applicability. © 2023 by Aussino Academic Publishing House. All rights reserved.

关键词： rock mechanics

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Vapor-induced phase separation PVdF membranes incorporating alkyl-modified nanoparticles for versatile membrane distillation

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desalination 2025年 613卷

作者： Venault, Antoine Chen, Ting-Wei Maggay, Irish Valerie Chang, Yung R&D Center for Membrane Technology and Department of Chemical Engineering Chung Yuan Christian University Chung-Li32023 Taiwan

This study explores the formation of superhydrophobic membranes by the vapor-induced phase separation (VIPS) process for versatile direct contact membrane distillation (dCMd) applications. Hydrophobic silica-based nanoparticles were synthesized and blended with polyvinylidene fluoride in green solvent triethyl phosphate. In the optimized conditions, the membrane presented a pore size (0.27 μm) and water contact angle in air (162°) suitable for dCMd and arising in a high liquid entry pressure. With a feed temperature of 60 °C and a transmembrane temperature gradient of 35 °C, the rejections were 99.99 %, 99.99 %, 99.93 %, and >95 %, using synthetic sea water (35 g/L NaCl), concentrated saline water, real sea water and a 30 ppm-perfluorooctanoic acid solution, respectively. The flux always ranged between 24 and 25 LMH. These values compete or outperform state-of-the-art membranes. Considering the relative ease of the membrane preparation process, its resistance to wetting (performance maintained after adding up to 0.3 mM surfactant) and scaling (no observed crystals arising from heterogeneous nucleation), but also its stability as tested by performing a 70 h-long test, these novel VIPS membranes are deemed suitable for versatile dCMd applications aimed at water desalination or purification. © 2025 Elsevier B.V.

关键词： Seawater

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