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An Adaptive Parallel EI Infilling Strategy Extended by Non-Parametric PMC Sampling Scheme for Efficient Global Optimization

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IEEE ACCESS 2023年 11卷 17793-17810页

作者： Hu, Yu Guo, Yaolin Liu, Zhen Li, Yifan Hu, Zheyu Shi, Diwei Bu, Moran Du, Shiyu Ningbo Univ Fac Elect Engn & Comp Sci Ningbo Peoples R China Chinese Acad Sci Ningbo Inst Mat Technol & Engn Engn Lab Adv Energy Mat Ningbo Peoples R China Harbin Engn Univ Coll Mat Sci & Chem Engn Harbin Heilongjiang Peoples R China Zhejiang Ocean Univ Sch Naval Architecture & Maritime Zhoushan Zhejiang Peoples R China China Univ Petr East China Sch Mat Sci & Engn Qingdao 266580 Peoples R China China Univ Petr East China Sch Comp Sci Qingdao 266580 Peoples R China Chinese Acad Sci Northeast Inst Geog & Agroecol Key Lab Soybean Mol Design Breeding Changchun 130102 Peoples R China

This paper presents a novel adaptive parallel Expected Improvement (EI) infilling strategy for Efficient Global Optimization (EGO) by introducing a two-staged Non-parametric Population Monte Carlo Sampling (NPMS) scheme. The samples are uniformly generated from EI function in the first stage and converge to sub-domains of high EI values thresholded by a non-parametric sampling selection method in Population Monte Carlo (PMC) iterative succession. In the second stage, learning from potential information, Density-Based Spatial Clustering (DBSCAN) method is used to cluster samples and converge to candidate points. Compared to the original EI strategy, NPMS improves the minimum result by 14.6% and reduces the number of candidate points by 15.8% on our benchmark cases of EGO. Furthermore, 13 test functions involving different input space sizes, difficulties, and dimensions are conducted on six strategies including NPMS, and the results showed that NPMS achieves the highest ranking in terms of result finding and cost savings but slightly decreases optimization efficiency. Benefiting from broad sampling and dynamic clustering, especially in large input space size cases, NPMS not only guarantees high result accuracy but also reduces optimization costs by up to 34.9% compared to other parallel methods. Finally, our proposed NPMS-extended EI strategy has successfully reduced the number of candidate points, which is expected to provide a cost-practical approach to more complex problems.

关键词： Expected improvement multi-peak characteristics parallel infilling strategy population Monte Carlo sampling method

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Cultivation of fractionated cells from a bioactive-alkaloid-bearing marine sponge Axinella sp.

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IN VITRO CELLULAR & developmentAL BIOLOGY-ANIMAL 2021年第5期57卷 539-549页

作者： Song, Yuefan Qu, Yi Cao, Xupeng Zhang, Wei Zhang, Fuming Linhardt, Robert J. Yang, Qi Dalian Ocean Univ Coll Food Sci & Engn Key Lab Aquat Prod Proc & Utilizat Liaoning Prov Dalian Peoples R China Rensselaer Polytech Inst Ctr Biotechnol & Interdisciplinary Studies Troy NY 12180 USA Dalian Environm Monitoring Ctr Dalian Peoples R China Chinese Acad Sci Dalian Inst Chem Phys State Key Lab Catalysis Dalian Peoples R China Flinders Univ S Australia Coll Med & Publ Hlth Ctr Marine Bioprod Dev Adelaide SA Australia Shanghai Jiao Tong Univ Sch Med Renji Hosp Dept PharmCtr Marine DrugsState Key Lab Oncogen Shanghai Peoples R China

Sponges are among the most primitive multicellular organisms and well-known as a major source of marine natural products. Cultivation of sponge cells has long been an attractive topic due to the prominent evolutionary and cytological significance of sponges and as a potential approach to supply sponge-derived compounds. Sponge cell culture is carried out through culturing organized cell aggregates called 'primmorphs.' Most research culturing sponge cells has used unfractionated cells to develop primmorphs. In the current study, a tropical marine sponge Axinella sp., which contains the bioactive alkaloids, debromohymenialdisine (DBH), and hymenialdisine (HD), was used to obtain fractionated cells and the corresponding primmorphs. These alkaloids, DBH and HD, reportedly show pharmacological activities for treating osteoarthritis and Alzheimer's disease. Three different cell fractions were obtained, including enriched spherulous cells, large mesohyl cells, and small epithelial cells. These cell fractions were cultivated separately, forming aggregates that later developed into different kinds of primmorphs. The three kinds of primmorphs obtained were compared as regards to appearance, morphogenesis, and cellular composition. Additionally, the amount of alkaloid in the primmorphs-culture system was examined over a 30-d culturing period. During the culturing of enriched spherulous cells and developed primmorphs, the total amount of alkaloid declined notably. In addition, the speculation of alkaloid secretion and some phenomena that occurred during cell culturing are discussed.

关键词： Sponge Cell culture Primmorphs Cell separation Bioactive alkaloids

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All-optical single-species cesium atomic comagnetometer with optical free induction decay detection

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APPLIED PHYSICS B-LASERS AND OPTICS 2021年第3期127卷 1-11页

作者： Yang, Yucheng Wu, Teng Chen, Jingbiao Peng, Xiang Guo, Hong Peking Univ Dept Elect Beijing 100871 Peoples R China Peking Univ Ctr Quantum Informat Technol State Key Lab Adv Opt Commun Syst & Networks Beijing 100871 Peoples R China

Atomic comagnetometers, which measure the spin precession frequencies of overlapped species simultaneously, are widely applied to search for exotic spin-dependent interactions. Here we propose and implement an all-optical single-species Cs atomic comagnetometer based on the optical free induction decay (FID) signal of Cs atoms in hyperfine levels F-g = 3 and 4 within the same atomic ensemble. We experimentally show that systematic errors induced by magnetic field gradients and pump light are highly suppressed in the comagnetometer. With further optimization, the single-species comagnetometer has the potential to be applied in searches for exotic spin-dependent interactions.

关键词： Cesium

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Chinese ink-coated elastic PU/PET fibers as multifunctional flexible wearable sensors

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SENSORS AND ACTUATORS A-PHYSICAL 2024年 380卷

作者： Wei, Runxue Liu, Banghan Wu, Feng Zhou, Xinyuan Liu, Mingxian Jinan Univ Coll Chem & Mat Sci Dept Mat Sci & Engn Guangzhou 511443 Peoples R China Jinan Univ Guangdong Prov Key Lab Speed Capabil Res Guangzhou 510632 Peoples R China

Textiles as conductive substrates are widely used in sensing applications due to their good elasticity, high stretchability and recoverable deformation. Here, the mask rope (polyurethane/polyester blended fibers) was selected as flexible substrate to load of conductive Chinese ink using surface swelling technique in N, N-dimethylformamide. The presence of carbon nanoparticles in the ink imparts electrical conductivity to the elastic fiber while maintaining the mechanical properties and extensibility of the fiber. This simple and low-cost method allows excellent interfacial adhesion between the conductivity ink layer and the elastic fibers, and the carbon particles do not fall off even when the modified fiber was treated by sonication in water. The ink coated elastic fiber as strain sensor shows excellent stability and sensitive responsiveness after 500 stretch-release cycles. The response and recovery times during the sensitivity experiment of the flexible fiber sensor are 133.79 and 134.76 ms. The sensor exhibits physiological motion detection and quality monitoring capabilities, which can accurately monitor human movements such as walking, wrist movement, throat swallowing and articulation. The sensor also has a good Joule heating effect, and the temperature of the conductive fiber can increase 88.9 degrees C in the 60 s under 15 V voltage. This work develops a simple and efficient, low-cost, mass-producible flexible sensor with potential for physiological activity, temperature, and humidity detection.

关键词： Sensor Simple preparation Temperature Electric heat Flexible Behavioural detection

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基于非对称PVA/墨水/PE双层膜的光驱动柔性致动器和多功能传感器

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Science china Materials 2023年第12期66卷 4782-4793页

作者：吴凤林晓莹许雨倩章迪何韵晴刘明贤 Department of Materials Science and Engineering College of Chemistry and Materials ScienceJinan UniversityGuangzhou 511443China

聚乙烯醇/中国墨水混合物被均匀涂覆在聚乙烯薄膜上制备了结构稳定的双层软驱动器.由于两层材料的热膨胀系数的显著差异,在氙灯照射下,驱动器能以较快的响应速度实现较大的弯曲变形.通过改变光的强度以及结合尺蠖的仿生结构设计,机器人... 详细信息

聚乙烯醇/中国墨水混合物被均匀涂覆在聚乙烯薄膜上制备了结构稳定的双层软驱动器.由于两层材料的热膨胀系数的显著差异,在氙灯照射下,驱动器能以较快的响应速度实现较大的弯曲变形.通过改变光的强度以及结合尺蠖的仿生结构设计,机器人可以在不同的表面(如纸张和树叶)上实现各种形式的运动.同时在光的驱动下,它可以实现物体的捕获、表情的改变、象鼻的收缩与卷曲以及仿生花朵的开闭等.此外,基于双层驱动器良好的光热转换和灵敏的压力传感性能,它可以实现人体运动监测(如关节弯曲、呼吸、吞咽等),还能与光电转换装置集成.这种多功能、多驱动模式软机器人在可穿戴设备、交通运输、光电转换设备等应用领域具有巨大潜力.

关键词： Chinese ink soft actuator light-driven actuation integration of photoelectric conversion motion monitoring

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Dynamic water system modeling: a systematic review

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WATER PRACTICE AND techNOLOGY 2021年第3期16卷 744-755页

作者： Cerecedo Arroyo, Maria Elena Martinez Austria, Polioptro Fortunato Univ Americas Puebla Dept Environm & Civil Engn Ex Hacienda Santa Catarina Martir S-N Ex Hacienda Cholula 72810 Mexico

Improving water resource management at a global scale is critical at this time. The risks to which bodies of water are currently exposed, whether due to climate change or anthropogenic conditions, affect water availability and quality in basins around the world. Nevertheless, water management has been revealed as a complex problem. In this light, one of the most promising methodologies is building dynamic simulation models, which may include the largest possible number of variables, not just hydrological. In this way, we may gain a broader perspective on all the natural and social dimensions encompassed in basins and, thus, improve decision making for the benefit of the population. This systematic review seeks to report the most representative results from several authors who have developed dynamic models applied to the management of water resources. Herein, special emphasis is placed on water resource management applied to basin models, decision making, and public policies, as well as on the modeling tools used and on model validation.

关键词： complex system dynamic modeling preferred reporting items for systematic reviews and meta-analyzes methodology water management water security

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Hydrate technologies for CO2 Capture and Sequestration: Status and Perspectives

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CHEMICAL REVIEWS 2024年第18期124卷 10363-10385页

作者： Wang, Pengfei Li, Yun Sun, Ningru Han, Songbai Wang, Xiaomeng Su, Qinqin Li, Yanjun He, Jian Yu, Xiaohui Du, Shiyu Francisco, Joseph S. Zhu, Jinlong Zhao, Yusheng Southern Univ Sci & Technol Shenzhen Key Lab Nat Gas Hydrate Shenzhen 518055 Peoples R China Southern Univ Sci & Technol Dept Phys Shenzhen 518055 Peoples R China Southern Univ Sci & Technol Inst Major Sci Facil New Mat Shenzhen 518055 Peoples R China Southern Univ Sci & Technol Acad Adv Interdisciplinary Studies Shenzhen 518055 Peoples R China Ningbo Polytech Sch Chem Engn Ningbo 315800 Peoples R China Harbin Engn Univ Coll Power & Energy Engn Harbin 150001 Peoples R China Shanghai Jiao Tong Univ Ctr Single Cell Om State Key Lab Syst Med Canc Sch Publ HlthSch Med Shanghai 200025 Peoples R China Eastern Inst Adv Study Ningbo 315200 Peoples R China Chinese Acad Sci Ningbo Inst Ind Technol Engn Lab Specialty Fibers & Nucl Energy Mat Ningbo 315201 Peoples R China Chinese Acad Sci Beijing Natl Lab Condensed Matter Phys Beijing 100190 Peoples R China Chinese Acad Sci Inst Phys Beijing 100190 Peoples R China Univ Penn Dept Earth & Environm Sci Dept Chem Philadelphia PA 19104 USA China Univ Petr East China Sch Mat Sci & Engn Qingdao 266580 Peoples R China China Univ Petr East China Sch Comp Sci Qingdao 266580 Peoples R China

CO2 capture and sequestration based on hydrate technology are considered supplementary approaches for reducing carbon emissions and mitigating the greenhouse effect. Direct CO2 hydrate formation and CH4 gas substitution in natural gas hydrates are two of the main methods used for the sequestration of CO2 in hydrates. In this Review, we introduce the crystal structures of CO2 hydrates and CO2-mixed gas hydrates and summarize the interactions between the CO2 molecules and clathrate hydrate/H2O frames. In particular, we focus on the role of diffraction techniques in analyzing hydrate structures. The kinetic and thermodynamic properties then are introduced from micro/macro perspectives. Furthermore, the replacement of natural gas with CO2/CO2-mixed gas is discussed comprehensively in terms of intermolecular interactions, influencing factors, and displacement efficiency. Based on the analysis of related costs, risks, and policies, the economics of CO2 capture and sequestration based on hydrate technology are explained. Moreover, the difficulties and challenges at this stage and the directions for future research are described. Finally, we investigate the status of recent research related to CO2 capture and sequestration based on hydrate technology, revealing its importance in carbon emission reduction.

关键词： Carbon sequestration

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Analysis and Design of Mobile Model for DTN

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Chinese Journal of Electronics 2023年第4期18卷 635-638页

作者： Zhiting Lin Yugui Qu Yusheng Ji Baohua Zhao Department of Computer Science University of Science and Technology of China Hefei China Province Key Laboratory of Software in Computing and Communication Hefei China Information Systems Architecture Science Research Division National Institute of Informatics Tokyo Japan

Delay tolerant networks may become unexpectedly partitioned due to node mobility or variation in signal strength. However, most widely used models in some relative works are generally very simplistic. In order to exploit intelligent forwarding algorithms, a novel nodal mobile model of delay tolerant networks is presented to map reality with more accuracy. And several approaches are introduced to analyze the network structure, such as n-cliques, n-clans, degree, closeness and betweenness. Our research results showed that the centralizations became smaller when the wireless connections were concerned. It meant that quite a number of nodes became potential relays because of the new structure of networks.

关键词： Wireless communication Analytical models Wireless sensor networks Protocols Social networking (online) Sensitivity analysis Social network theory

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Steering ammonia decomposition over Ru nanoparticles on ZrO2 by enhancing metal-support interaction

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CATALYSIS SCIENCE & techNOLOGY 2023年第18期13卷 5205-5213页

作者： Zhang, Tong Ju, Xiaohua Liu, Lvye Liu, Lin He, Teng Xu, Yunhua Wang, Hanying Chen, Ping Xian Univ Technol Sch Mat Sci & Engn Xian 710048 Peoples R China Yulin Univ Sch Energy Engn Yulin 719000 Peoples R China Chinese Acad Sci Dalian Inst Chem Phys Dalian Natl Lab Clean Energy State Key Lab Catalysis Dalian 116023 Peoples R China Univ Chinese Acad Sci Ctr Mat Sci & Optoelect Engn Beijing 100049 Peoples R China

ZrO2, one of the typical oxides, holds promise as a support for supported metal-based catalysts. Herein, Ru nanoparticles (NPs) on ZrO2 (Ru/ZrO2) analogues were prepared from milling and precipitation methods and applied in ammonia decomposition reaction. It was found that the Ru NPs in different Ru/ZrO2 samples possessed similar particle sizes. Under identical reaction conditions, the Ru/ZrO2 obtained from precipitation methods exhibits much higher activity than the Ru/ZrO2 analogue with nearly identical Ru NPs on ZrO2 obtained from the milling method. A hydrogen formation rate of 1439 mmol g(cat)(-1) h(-1) and excellent stability were achieved over Ru/ZrO2 catalyst from the precipitation method at 450 & DEG;C with a space velocity of 30 000 mL g(cat)(-1) h(-1), comparable with many efficient Ru-based catalysts reported previously. The characterization results reveal that the superior catalytic performance of Ru/ZrO2 from the precipitation method was mainly attributed to the modulated electronic structure of Ru NPs, which stems from the intimate interaction between Ru NPs and the ZrO2 support. As a result, Ru/ZrO2 from the precipitation method can facilitate the activation and dissociation of NH3 molecules and exhibit greatly enhanced activity and intrinsic activity for NH3 decomposition. This work offers opportunity for improving the catalyst performance by regulating the metal-support interaction of Ru-based NH3 decomposition catalysts.

关键词： Ammonia

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Gradient radiation breeding and culture domestication of menaquinone producing strains

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BIOPROCESS AND BIOSYSTEMS ENGINEERING 2021年第7期44卷 1373-1382页

作者： Wu, Hefang Wang, Han Wang, Peng Zhao, Geihai Liu, Hui Wang, Li Sun, Xiaowen Zheng, Zhiming Chinese Acad Sci Hefei Inst Phys Sci Key Lab High Magnet Field & Ion Beam Phys Biol Shushanhu Rd 350 Hefei 210031 Anhui Peoples R China Univ Chinese Acad Sci Beijing Peoples R China

By comparing the survival rate and positive mutation rate of the primary mutagenic strain and progeny mutagenic strain under different radiation doses, the results showed that the tolerance of the mutagenic strain to radiation dose increased with the increase of the mutagenic generations. We adopted an improved gradient radiation breeding strategy to improve the breeding efficiency. The strains were treated with radiation in four stages. The first stage was low energy N+ ion implantation (ion energy 15 keV, dose 80 x 2.6 x 10(13) cm(-2)). In the second stage, the energy and dose of N+ ion reached to 20 keV, 90 x 2.6 x 10(13) cm(-2). In the third stage, Co-60-gamma radiation (dose of 1.56 kGy) was used. In the fourth stage, the radiation dose of Co-60-gamma increased to 1.82 kGy. After each stage of radiation, the MK (Menaquinone) precursor 1, 4-dihydroxy-2-naphthalate (DHNA) was used as the stress factor to domesticate the mutant strains. By gradually increasing the concentration of DHNA in the culture medium, the substrate tolerance of Flavobacterium sp. was effectively improved. By measuring SOD (superoxide dismutase) activity and malondialdehyde, it showed that the cell damage caused by radiation mutagenesis to the offspring mutant was less than that of the primary mutant. Changes in membrane permeability and membrane potential of the mutant strains were reflected in changes in fluorescence intensity of luciferin diacetate and rhodamine 123, which could explain the enhanced substrate tolerance of strain F-2. After gradient radiation breeding and culture acclimation, the biomass of mutant Strain F-2 was 6.59 g/L, and the MK yield was 9.59 mg/L.

关键词： Biofilm lipid peroxidation Gamma ray mutagenesis Low-energy ion implantation Menaquinone (MK) SOD activity

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