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Analysis of GC×GC fingerprints from medicinal materials using a novel contour detection algorithm:A case of Curcuma wenyujin

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Journal of Pharmaceutical Analysis 2024年第4期14卷 542-551页

作者： Xinyue Yang Yingyu Sima Xuhuai Luo Yaping Li Min He Department of Pharmaceutical engineering School of Chemical EngineeringXiangtan UniversityXiangtanHunan411105China Molecular Science and Biomedicine Laboratory(MBL) State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringAptamer Engineering Center of Hunan ProvinceHunan UniversityChangsha410082China Department of Quality control Xiangtan Central HospitalXiangtanHunan411100China

This study introduces an innovative contour detection algorithm,PeakCET,designed for rapid and efficient analysis of natural product image fingerprints using comprehensive two-dimensional gas chromatogram(GC×GC).This method innovatively combines contour edge tracking with affinity propagation(AP)clustering for peak detection in GC×GC fingerprints,the first in this *** edge tracking signif-icantly reduces false positives caused by“burr”signals,while AP clustering enhances detection accuracy in the face of false *** efficacy of this approach is demonstrated using three medicinal products derived from Curcuma *** not only performs contour detection but also employs inter-group peak matching and peak-volume percentage calculations to assess the compositional similarities and differences among various ***,this algorithm compares the GC×GC fingerprints of Radix/Rhizoma Curcumae Wenyujin with those of products from different botanical *** findings reveal that genetic and geographical factors influence the accumulation of secondary metabolites in various plant *** sample exhibits unique characteristic components alongside common ones,and vari-ations in content may influence their therapeutic *** research establishes a foundational data-set for the quality assessment of Curcuma products and paves the way for the application of computer vision techniques in two-dimensional(2D)fingerprint analysis of GC×GC data.

关键词： GC×GC Image fingerprints Contour detection Clustering of mass spectra Curcuma products

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High-resolution recognition of FOAM modes via an improved EfficientNet V2 based convolutional neural network

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Frontiers of physics 2024年第3期19卷 175-183页

作者： Youzhi Shi Zuhai Ma Hongyu Chen Yougang Ke Yu Chen Xinxing Zhou International collaborative Laboratory of 2D Materials for Optoelectronics Science and technology Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Key Laboratory of Low-Dimensional Quantum Structures and Quantum control of Ministry of Education Synergetic Innovation Center for Quantum Effects and ApplicationsSchool of Physics and ElectronicsHunan Normal UniversityChangsha 410081China Key Laboratory of hunan province on information Photonics and Freespace Optical Communications School of Information Science and EngineeringHunan Institute of Science and TechnologyYueyang 414006China

Vortex beam with fractional orbital angular momentum (FOAM) is the excellent candidate for improving the capacity of free-space optical (FSO) communication system due to its infinite modes. Therefore, the recognition of FOAM modes with higher resolution is always of great concern. In this work, through an improved EfficientNetV2 based convolutional neural network (CNN), we experimentally achieve the implementation of the recognition of FOAM modes with a resolution as high as 0.001. To the best of our knowledge, it is the first time this high resolution has been achieved. Under the strong atmospheric turbulence (AT) (C_(n)^(2)=10^(-15)m^(-2/3)), the recognition accuracy of FOAM modes at 0.1 and 0.01 resolution with our model is up to 99.12% and 92.24% for a long transmission distance of 2000 m. Even for the resolution at 0.001, the recognition accuracy can still remain at 78.77%. This work provides an effective method for the recognition of FOAM modes, which may largely improve the channel capacity of the free-space optical communication.

关键词： OAM free-space optical communication deep learning convolutional neural network

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Novel control strategy for the energy recovery system of a hydraulic excavator

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International Journal of Agricultural and Biological engineering 2024年第2期17卷 94-101页

作者： Changsheng Liu Qinghua He Qijun Tang Kai Ren Jun Gong Daqing Zhang The National Enterprise research and Development center Sunward Intelligence Equipment Co.Ltd.Changsha 410131China college of Mechanical and Electrical engineering Hunan Agricultural UniversityChangsha 410128China college of Eletronical and information engineering Hunan UniversityChangsha 410082China

The energy saving of hydraulic excavators is always an essential *** energy recovery system can effectively recover the boom potential energy and rotational kinetic *** on the standard working cycle of hydraulic excavators,a dynamic programming(DP)control strategy for hybrid hydraulic excavators was proposed to recover the boom potential energy and rotational kinetic *** hybrid hydraulic excavator simulation model was built by Simulink *** simulation results indicated that the fuel consumption of hybrid hydraulic excavators using the DP control strategy was about 21.3%lower than that of the conventional hydraulic *** order to experimentally verify the simulation results,an experimental platform for hybrid hydraulic excavators was *** experimental results indicated that the fuel consumption of hybrid hydraulic excavators using the DP control strategy was about 18.9%lower than that of the conventional hydraulic *** paper shows that the DP control strategy applied to hybrid hydraulic excavators can recycle the boom potential energy and rotational kinetic energy,and reduce the fuel consumption of hybrid hydraulic excavators.

关键词： hybrid excavator energy recovery control strategy simulation analysis test platform

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multi-Resource collaborative Service Restoration of a Distribution Network with Decentralized Hierarchical Droop control

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Protection and control of Modern Power Systems 2024年第1期9卷 19-37页

作者： Wei Zhang Cong Zhang Jiayong Li Lipeng Zhu Shiran Cao Wen Huang Zhikang Shuai college of Electrical and information engineering Hunan UniversityChangshaChina hunan University ChangshaChina CSEE Journal of Power and energy Systems Chinese Journal of Electrical Engineerin

To improve the resilience of distribution networks(DNs)in the event of extreme natural disasters such as typhoons and rainstorms,it is imperative to efficiently implement distribution service restoration(DSR)to restore loads as soon as *** previous studies,DSR has mainly adopted the distributed resource model with droop or PQ *** inhibits the exploitation of the potential of distributed generators(DGs)in load restoration when the DN loses support from the upstream transmission ***,this paper proposes a multi-resource collaborative service restoration(MRCSR)approach for DNs incorporating local soft open points,DGs,and tie *** MRCSR model is developed by integrating a decentralized hierarchical droop control(DHDC)strategy and incorporating the frequency and voltage features of the load demand.A two-stage iterative feedback optimization(TSIFO)algorithm is then developed to analyze the MRCSR model in an accurate and efficient ***,the proposed model and algo-rithm are tested on the modified IEEE 33-bus system and a practical distribution system of the Taiwan Power Company to verify their effectiveness and advantages over existing approaches.

关键词： service Service integrating

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Quantum squeezing induced nonreciprocal phonon laser

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Science China(Physics,Mechanics & Astronomy) 2024年第6期67卷 20-30页

作者： Tian-Xiang Lu Yan Wang Keyu Xia Xing Xiao Le-Man Kuang Hui Jing college of Physics and Electronic information Gannan Normal UniversityGanzhou 341000China Key Laboratory of Low-Dimensional Quantum Structures and Quantum control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China Academy for Quantum Science and technology Zhengzhou University of Light IndustryZhengzhou 450002China college of engineering and Applied Sciences National Laboratory of Solid State Microstructuresand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China

Phonon lasers or coherent amplifications of mechanical oscillations are powerful tools for fundamental studies on coherent acoustics and hold potential for diverse applications,ranging from ultrasensitive force sensing to phononic information ***,we propose the use of an optomechanical resonator coupled to a nonlinear optical resonator for directional phonon *** find that by pumping the nonlinear optical resonator,directional optical squeezing can occur along the pump *** a result,we can achieve the directional mechanical gain using directional optical squeezing,thereby leading to nonreciprocal phonon lasing with a well-tunable directional power *** work proposes a feasible way to build nonreciprocal phonon lasers with various nonlinear optical media,which are important for a wide range of applications,such as directional acoustic amplifiers,invisible sound sensing or imaging,and one-way phononic networks.

关键词： nonreciprocal phonon laser directional quantum squeezing optomechanics

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Precise mode control of laser-written waveguides for broadband,low-dispersion 3D integrated optics

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Light(Science & Applications) 2024年第6期13卷 1186-1195页

作者： Yuying Wang Lijing Zhong Kuen Yao Lau Xuhu Han Yi Yang Jiacheng Hu Sergei Firstov Zhi Chen Zhijun Ma Limin Tong Kin Seng Chiang Dezhi Tan Jianrong Qiu college of Optical Science and engineering Zhejiang University310027HangzhouChina Institute of Light+X Science and technology College of Information Science and EngineeringNingbo University315211NingboChina School of Optoelectronic Science and engineering&collaborative Innovation center of Suzhou Nano Science and technology Soochow University215006SuzhouChina Prokhorov General Physics Institute of the Russian Academy of Sciences Dianov Fiber Optics Research Center38 Vavilov str.Moscow119333Russia Zhejiang Lab 311121HangzhouChina college of Materials Science and engineering Key Laboratory of Advanced Materials of Yunnan ProvinceKunming University of Science and Technology650093KunmingYunnanChina Department of Electrical engineering City University of Hong Kong83 Tat Chee AvenueKowloonHong Kong SARChina School of Materials Science and engineering Zhejiang University310027HangzhouChina

Three-dimensional(3D)glass chips are promising waveguide platforms for building hybrid 3D photonic circuits due to their 3D topological capabilities,large transparent windows,and low coupling *** present,the key challenge in scaling down a benchtop optical system to a glass chip is the lack of precise methods for controlling the mode field and optical coupling of 3D waveguide ***,we propose an overlap-controlled multi-scan(OCMS)method based on laser-direct lithography that allows customizing the refractive index profile of 3D waveguides with high spatial precision in a variety of *** the basis of this method,we achieve variable mode-field distribution,robust and broadband coupling,and thereby demonstrate dispersionless LP21-mode conversion of supercontinuum pulses with the largest deviation of<0.1 dB in coupling ratios on 210 nm *** approach provides a route to achieve ultra-broadband and low-dispersion coupling in 3D photonic circuits,with overwhelming advantages over conventional planar waveguide-optic platforms for on-chip transmission and manipulation of ultrashort laser pulses and broadband supercontinuum.

关键词： waveguide mode dispersion

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Leucine regulates lipid metabolism in adipose tissue through adipokine-mTOR-SIRT1 signaling pathway and bile acid—microbe axis in a finishing pig model

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Animal Nutrition 2024年第1期16卷 158-173页

作者： Yunju Yin Saiming Gong Mengmeng Han Jingzun Wang Hanjing Shi Xianji Jiang Liu Guo Yehui Duan Qiuping Guo Qinghua Chen Fengna Li Key Laboratory of Agro-ecological Processes in Subtropical Region Institute of Subtropical AgricultureChinese Academy of SciencesHunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic ProcessHunan Provincial Engineering Research Center for Healthy Livestock and Poultry ProductionChangsha 410125China college of Animal Science and technology Hunan Agricultural UniversityChangsha 410128China college of Modern Agricultural Sciences University of Chinese Academy of SciencesBeijing 100049China college of Life Science and engineering Northwest Minzu UniversityLanzhou 730124China college of Life Sciences Hunan Normal UniversityChangsha 410128China

This study was conducted to explore the regulatory mechanism of leucine(Leu)on lipid metabolism of finishing ***-four Duroc×Landrace×Large cross pigs with an average body weight of68.33±0.97 kg were randomly allocated into 3 treatment groups with 8 replicates per group(1 pig per replicate).The dietary treatments were as follows:control group(CON),0.25%Leu group and 0.50%Leu *** experimental period was 42 *** results showed as follows.(1)Compared with the CON,0.25%and 0.50%Leu increased(Pinformation regulator 2homolog 1(p-SIRT1)and acetylation ribosome s6 protein kinase 1(Ac—S6K1)were increased(P<0.05).(3)Compared to the CON,the diversity of gut microbiota in the 0.25%Leu group was *** component analysis showed that the relative abundance of Bacteroidetes,Lactobacillus and Desulfovibrio was higher in the 0.25%Leu group than the CON,but the relative abundance of Firmicutes,Treponema and Shigella was lower than in the CON(P<0.05).(4)Four different metabolites were screened out from the serum of finishing pigs including allolithocholic acid(alloLCA),isolithocholic acid(isoLCA),ursodeoxycholic acid(UDCA)and hyodeoxycholic acid(HDCA),which correlate to various degrees with the above *** conclusion,Leu could promote adipose tissue lipolysis of finishing pigs through the mTOR-SIRT1 signaling pathway,a

关键词： Leu Lipid metabolism Gut microbiota Bile acid

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无人飞行器在不确定扰动下的动态目标跟踪

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engineering 2024年第4期35卷 74-85页

作者： Yanjie Chen Yangning Wu Limin Lan Hang Zhong Zhiqiang Miao Hui Zhang Yaonan Wang School of Mechanical engineering and Automation Fuzhou UniversityFuzhou 350108China Department of Computer Science Aberystwyth UniversityAberystwyth SY233DBUK School of Robotics Hunan UniversityChangsha 410082China college of Electrical and information engineering Hunan UniversityChangsha 410082China National engineering research center of Robot Visual Perception and control technology Hunan UniversityChangsha 410082China

This study proposes an image-based visual servoing(IBVS)method based on a velocity observer for an unmanned aerial vehicle(UAV)for tracking a dynamic target in Global Positioning System(GPS)-denied *** proposed method derives the simplified and decoupled image dynamics of underactuated UAVs using a constructed virtual camera and then considers the uncertainties caused by the unpredictable rotations and velocities of the dynamic target.A novel image depth model that extends the IBVS method to track a rotating target with arbitrary orientations is *** depth model ensures image feature accuracy and image trajectory smoothness in rotating target *** relative velocities of the UAV and the dynamic target are estimated using the proposed velocity *** to the velocity observer,translational velocity measurements are not required,and the control chatter caused by noise-containing measurements is *** integral-based filter is proposed to compensate for unpredictable environmental disturbances in order to improve the antidisturbance *** stability of the velocity observer and IBVS controller is analyzed using the Lyapunov *** simulations and multistage experiments are conducted to illustrate the tracking stability,anti-disturbance ability,and tracking robustness of the proposed method with a dynamic rotating target.

关键词： Unmanned aerial vehicle Visual servoing Velocity observer Target tracking

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The Response of Carbonate System to Watershed Urbanization Process in a Semi-Arid River

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Journal of Ocean University of China 2024年第4期23卷 991-1002页

作者： LI Yunxiao DANG Jiajia HUANG Xiao YANG Hong WANG Xiao LI Lina BAI Jie CHEN Xi Department of Environmental Science College of Resource and EnvironmentShanxi Agricultural UniversityTaigu 030801China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution control Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044China Department of Geography and Environmental Science University of ReadingWhiteknightsReading RG66ABUK Marine Agriculture research center Tobacco Research InstituteChinese Academy of Agricultural SciencesQingdao 266101China 5 Key Laboratory of Marine Environmental Science and Ecology Ministry of EducationCollege of Environmental Science and EngineeringOcean University of ChinaQingdao 266100China

Different from rivers in humid areas,the variability of riverine CO_(2) system in arid areas is heavily impacted by anthropogenic disturbance with the increasing urbanization and water *** this study,the water chemistry and the controls of carbonate system in an urbanized river(the Fenhe River)on the semi-arid Loess Plateau were *** water chemistry of the river water showed that the high dissolved inorganic carbon(DIC)concentration(about 37 mg L^(-1))in the upstream with a karst land type was mainly sourced from carbonate weathering involved by H_(2)CO_(3) and H_(2)SO_(4),resulting in an oversaturated partial pressure of CO_(2)(pCO_(2))(about 800μatm).In comparison,damming resulted in the widespread appearance of non-free flowing river segments,and aquatic photosynthesis dominated the DIC and pCO_(2) spatiality demonstrated by the enriched stable isotope of DIC(δ^(13)CDIC).Especially in the mid-downstream flowing through major cities in warm and low-runoff August,some river segments even acted as an atmospheric CO_(2) *** noteworthy is wastewater input leading to a sudden increase in DIC(>55 mg L^(-1))and pCO_(2)(>4500μatm)in the downstream of Taiyuan City,and in cold November the increased DIC even extended to the outlet of the *** results highlight the effects of aquatic production induced by damming and urban sewage input on riverine CO_(2) system in semi-arid areas,and reducing sewage discharge may mitigate CO_(2) emission from the rivers.

关键词： dissolved inorganic carbon stable carbon isotope carbonate weathering aquatic photosynthesis sewage input the Fenhe River

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Versatile and controlled quantum teleportation network

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Chinese Physics B 2024年第3期33卷 415-423页

作者：周瑶瑶梅鹏娴刘艳红吴量李雁翔闫智辉贾晓军 Department of Physics Taiyuan Normal UniversityJinzhong 030619China college of information engineering Shanxi Vocational University of Engineering Science and TechnologyJinzhong 030619China Shanxi North Machinery Manufacturing Co. LtdTaiyuan 030000China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China collaborative Innovation center of Extreme Optics Shanxi UniversityTaiyuan 030006China

A quantum teleportation network involving multiple users is essential for future quantum *** far,controlled quantum teleportation has been demonstrated in a three-user ***,versatile and controlled quantum teleportation network involving more users is in demand,which satisfies different combinations of users for practical *** we propose a highly versatile and controlled teleportation network that can switch among various combinations of different *** use a single continuous-variable six-partite Greenberger-Horne-Zeilinger(GHZ)state to realize such a task by choosing the different measurement and feedback *** controlled teleportation network,which includes one sub-network,two sub-networks and three sub-networks,can be realized for different application of user ***,the coherent feedback control(CFC)can manipulate and improve the teleportation *** approach is flexible and scalable,and would provide a versatile platform for demonstrations of complex quantum communication and quantum computing protocols.

关键词： quantum teleportation coherent feedback control versatile controlled transformation

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