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Newly designed identifying method for ice thickness on highvoltage transmission lines via machine vision

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High Voltage 2021年第5期6卷 904-922页

作者： Bingjun Weng Wei Gao Weico. Zheng Gengjie Yang co.lege of Electrical Engineering and Automation Fuzhou UniversityFuzhouFujianChina ningde Power Supply co.pany of State Grid fujian Electric Power co. LtdNingdeFujianChina

The icing of transmission lines will bring co.siderable challenges to the safe operation of the power ***,a novel method co.bines machine vision and machine learning algorithms for identifying the ice thickness on high‐voltage transmission line(HVTL)as proposed ***,noise and background interference in the image are filtered,and the grey image is used as ***,the algorithms of improved Canny edge detection,Hough transform,improved K‐means clustering,and least‐squares fitting are adopted in turn to locate the edges of ***,acco.ding to the distance mapping model based on monocular vision,the ice thickness of the co.ductor is determined by calculating the width difference before and after *** experimental results show that the proposed method can accurately locate the edge of the co.ductor in both field and experimental ***,it can ensure ideal effects under different illumination and hardly not be affected by distortion in both horizontal and vertical ***,the distance mapping model can map the pixel distance to the actual distance with high precision,no matter whether the background is simple or co.plex,and the calculated ice thickness has only a small deviation co.pared to the actual *** addition,the proposed method shows high reliability and effectiveness when various interference such as different backgrounds,uneven icing,height difference changes,co.ductor movement,co.trast changes,and co.ductor sag occur.

关键词： method image illumination

In Vitro Probiotic Effect of Pseudostellaria heterophylla Fibrous Roots on Feed Bacillus subtilis and Preliminary Study on Its Solid Fermentation

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Animal Husbandry and Feed Science 2019年第2期11卷 72-76页

作者： Pan Huiqing Zhang Yanda Li Zhujin Zhao Qi fujian beidi Pharmaceutical co. Ltd. Ningde 355300 China Municipal Enterprise technology Center of fujian beidi Pharmaceutical co. Ltd. Ningde 355300 China

Traditional Chinese medicine Pseudostellaria heterophylla fibrous roots have been widely studied and applied in non-antibiotic clinical breeding of livestock and poultry. In vitro probiotic effect of P. heterophylla fibrous roots extract on feed probiotics Bacillus subtilis BD-K010 was studied, and the feasibility of solid fermentation of P. heterophylla fibrous roots was preliminarily evaluated. For in vitro probiotic effect, the increased co.centration of P. heterophylla fibrous roots extract dependently increased the total biomass of B. subtilis BD-K010;1.0% P. heterophylla fibrous roots extract received the best effect, and the final p H of 1.0% experimental group was closer to neutral. Meantime, B. subtilis BD-K010 with optimum co.centration of P. heterophylla fibrous roots showed significantly higher in vitro antibacterial effect than the co.trol group(Pco.i and Staphyloco.cus aureus were improved by 51.99% and 63.16%, but it was ineffective to Salmonella. For solid fermentation, the profile of substrate co.plex and appendage flocculent structure on substrate surface at the end of fermenta-tion in experimental groups added with B. subtilis BD-K010 and cellulase plus BD-K010 were more co.plex;the live bacteria number, polysaccharide co.tent and saponin co.tent at fermentation end-point in two experimental groups were extremely higher than those in the co.trol group(Pbiotic effect on B. subtilis BD-K010 and promoted its antibacterial effect, and it is feasible to use probiotics for solid fermentation of P. heterophylla fibrous roots and to improve effective co.ponents. It is of great significance to further de-velop and utilize P. heterophylla fibrous roots resources in modern animal husbandry.

关键词： Pseudostellaria heterophylla fibrous roots Feed probiotics Bacillus subtilis In vitro probiotic effect Solid fermentation

Optimization of Enzymatic Extraction Process of Polysaccharides from Pseudostellaria heterophylla Fibrous Roots by Response Surface Methodology and Its Pilot Application

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Medicinal Plant 2024年第5期15卷 17-21页

作者： Huiqing PAN Qi ZHAO Yanda ZHANG Rongping YANG fujian Provincial Enterprise technology Center of fujian beidi Pharmaceutical co. Lid.Ningde 355300China fujian beidi Pharmaceutical co. Ltd.Ningde 355300China Zherong co.nty TaiZiShen Association Ningde 355300China

[Objectives]To study and optimize the process co.ditions of enzymatic hydrolysis technology for extracting polysaccharides from Pseudostellaria heterophylla fibrous roots and its application in workshop pilot tests.[Methods]*** fibrous roots were taken as the matrix material,and Box Behnken design was used to analyze the extraction time,co.posite enzyme addition amount,and liquid-solid ratio for response surface optimization experiments,and then applied to the pilot extraction of *** fibrous roots.[Results]Response surface analysis showed that all factors had a significant impact on the experimental *** optimal extraction process co.ditions for polysaccharides from *** fibrous roots were extraction time of 2.7 h,co.pound enzyme addition of 2.5%,and liquid-solid ratio of *** yield of polysaccharides from *** fibrous roots was 4.83%.The water extraction process of *** fibrous roots extraction pilot was used as the co.trol group for response surface optimization of the pilot *** optimization results showed that the extraction time was 3 h,the amount of co.posite enzyme added was 2.5%,and the liquid-solid ratio was *** polysaccharide yield was 4.75%,an increase of 4.63%co.pared to the co.trol group.[co.clusions]This paper co.ld provide feasibility for the innovation of enzy-matic hydrolysis technology for *** fibrous roots and its workshop pilot practice application,as well as a reference for the industrial application of its medicinal resources.

关键词： Pseudostellaria heterophylla fibrous roots Polysaccharides Enzymatic extraction Pilot production Response surface opti timization

Dual RNA-seq provides novel insight into the roles of dks A from Pseudomonas pleco.lossicida in pathogenhost interactions with large yellow croakers(Larimichthys crocea)

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Zoological Research 2020年第4期41卷 410-422页

作者： Lu-Ying Wang Zi-XuLiu Ling-Min Zhao Li-Xing Huang Ying-Xue Qin Yong-Quan Su Wei-Qiang Zheng Fan Wang Qing-Pi Yan Fisheries co.lege Jimei UniversityXiamenFujian 361021China State Key Laboratory of Large Yellow Croaker Breeding Ningde Fufa Aquatic Products Co.Ltd.NingdeFujian 352000China fujian Provincial Fishery Technical Extension Center FuzhouFujian 350003China

Pseudomonas pleco.lossicida is a rod-shaped,gram-negative bacterium with *** causes visceral white spot disease and high mortality in Larimichthys crocea during culture,resulting in serious eco.omic *** of transcriptome and quantitative real-time polymerase chain reaction(PCR)data showed that dks A gene expression was significantly up-regulated after 48 h of infection with Epinephelus co.oides(log2 FC=3.12,Pco.pared with wild-type strains,the symptoms of visceral white spot disease in *** infected with RNAi strains were reduced,with time of death delayed by 48 h and mortality reduced by 25%.The dks A silencing led to a substantial down-regulation in cellular co.ponent-,flagellum-,and ribosome assembly-related genes in ***,and the significant up-regulation of fli C may be a way in which virulence is maintained in *** GO and KEGG results showed that RNAi strain infection in *** led to the down-regulation of inflammatory factor genes in immune-related pathways,which were associated with multiple immune response *** also showed that dks A was a virulence gene in *** with the wild-type strains,RNAi strain infection induced a weaker immune response in ***.

关键词： mortality infection yellow

Mobile-Deep Based PCB Image Segmentation Algorithm Research

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co.puters, Materials & co.tinua 2023年第11期77卷 2443-2461页

作者： Lisang Liu Chengyang Ke He Lin School of Electronic Electrical Engineering and Physics Fujian University of TechnologyFuzhou350118China State Grid fujian Power Supply co. Ltd.Xiapu Power Supply CompanyNingde355100China

Aiming at the problems of inaccurate edge segmentation,the hole phenomenon of segmenting large-scale targets,and the slow segmentation speed of printed circuit boards(PCB)in the image segmentation process,a PCB image segmentation model Mobile-Deep based on DeepLabv3+semantic segmentation framework is ***,the DeepLabv3+feature extraction network is replaced by the lightweight model MobileNetv2,which effectively reduces the number of model parameters;seco.dly,for the problem of positive and negative sample imbalance,a new loss function is co.posed of Focal Loss co.bined with Dice Loss to solve the category imbalance and improve the model discriminative ability;in addition,a more efficient atrous spatial pyramid pooling(E-ASPP)module is *** addition,a more efficient E-ASPP module is proposed,and the Roberts crossover operator is chosen to sharpen the image edges to improve the model accuracy;finally,the network structure is redesigned to further improve the model accuracy by drawing on the multi-scale feature fusion *** experimental results show that the proposed segmentation algorithm achieves an average intersection ratio of 93.45%,a precision of 94.87%,a recall of 93.65%,and a balance sco.e of 93.64%on the PCB test set,which is more accurate than the co.mon segmentation algorithms Hrnetv2,UNet,PSPNet,and PCBSegClassNet,and the segmentation speed is faster.

关键词： PCB boards image segmentation mobile-deep loss function roberts crossover operator

Bending and wave propagation analysis of axially functionally graded beams based on a reformulated strain gradient elasticity theory

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Applied Mathematics and Mechanics(English Edition) 2023年第10期44卷 1803-1820页

作者： Shaopeng WANG Jun HONG Dao WEI Gongye ZHANG Jiangsu Key Laboratory of Engineering Mechanics School of Civil EngineeringSoutheast UniversityNanjing 210096China co.temporary Amperex technology co. Ltd.Ningde 352100Fujian ProvinceChina

A new size-dependent axially functionally graded(AFG) micro-beam model is established with the application of a reformulated strain gradient elasticity theory(RSGET). The new micro-beam model inco.porates the strain gradient, velocity gradient,and co.ple stress effects, and acco.nts for the material variation along the axial direction of the two-co.ponent functionally graded beam. The governing equations and co.plete boundary co.ditions of the AFG beam are derived based on Hamilton's principle. The co.rectness of the current model is verified by co.paring the static behavior results of the current model and the finite element model(FEM) at the micro-scale. The influence of material inhomogeneity and size effect on the static and dynamic responses of the AFG beam is studied. The numerical results show that the static and vibration responses predicted by the newly developed model are different from those based on the classical model at the micro-scale. The new model can be applied not only in the optimization of micro aco.stic wave devices but also in the design of AFG micro-sensors and micro-actuators.

关键词： Timoshenko beam theory reformulated strain gradient elastic theory(RSGET) axially functionally graded(AFG)material Hamilton's principle

Reevaluation on Antioxidant Activity of Tonic Chinese Herbs Pseudostellaria heterophylla

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Animal Husbandry and Feed Science 2020年第1期12卷 11-16页

作者： Zhang Yanda fujian beidi Pharmaceutical co. Ltd.Ningde 355300China Municipal Enterprise Technical Center of fujian beidi Pharmaceutical co. Ltd.Ningde 355300China co.lege of Life Science Henan Agricultural UniversityZhengzhou 450002China

Tonic Chinese herbs Pseudostellaria heterophylla has co.plex co.ponents,which has both medicinal and nutritional effects,and the clinical research on anti-oxidation of *** has beco.e a *** searching domestic and foreign databases,the antioxidant literatures of *** were searched,co.sulted,sorted,classified and analyzed,and systematic reevaluation of antioxidant function was co.ducted from three aspects of *** extract in vitro chemical method,biological method and animal test method acco.ding to evaluation criteria for antioxidant activity of traditional Chinese medicine and Meta analysis statistical *** results would provide systematic reference for further research and development of ***,especially for forage value excavation and development of *** in the field of modern animal breeding.

关键词： Tonic Chinese herbs Pseudostellaria heterophylla Antioxidant activity Reevaluation

Novel insights into host-pathogen interactions of large yellow croakers(Larimichthys crocea)and pathogenic bacterium Pseudomonas pleco.lossicida using time-resolved dual RNA-seq of infected spleens

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Zoological Research 2020年第3期41卷 314-327页

作者： Yi Tang Ge Xin Ling-Min Zhao Li-Xing Huang Ying-Xue Qin Yong-Quan Su Wei-Qiang Zheng Bin Wu Nan Lin Qing-Pi Yan Fisheries co.lege Key Laboratory of Healthy Mariculture for the East China SeaMinistry of AgricultureJimei UniversityXiamenFujian 361021China State Key Laboratory of Large Yellow Croaker Breeding Ningde Fufa Aquatic Products Co.Ltd.NingdeFujian 352000China fujian Provincial Fishery Technical Extention Center FuzhouFujian 350003China

Host-pathogen interactions are highly co.plex,involving large dynamic changes in gene expression during infection. These interactions are fundamental to understanding anti-infection immunity of hosts, as well as the pathogenesis of pathogens. For bacterial pathogens interacting with animal hosts, timeresolved dual RNA-seq of infected tissue is difficult to perform due to low pathogen load in infected tissue. In this study, an acute infection model of Larimichthys crocea infected by Pseudomonas pleco.lossicida was established. The spleens of infected fish exhibited typical symptoms, with a maximum bacterial load at two days post-injection(dpi). Time-resolved dual RNA-seq of infected spleens was successfully applied to study hostpathogen interactions between L. crocea and ***. The spleens of infected L. crocea were subjected to dual RNA-seq, and transcriptome data were co.pared with those of noninfected spleens or in vitro cultured bacteria. Results showed that pathogen-host interactions were highly dynamically regulated, with co.responding fluctuations in host and pathogen transcriptomes during infection. The expression levels of many immunogenes involved in cytokine-cytokine receptor,Toll-like receptor signaling, and other immunerelated pathways were significantly up-regulated during the infection period. Furthermore, metabolic processes and the use of oxygen in L. crocea were strongly affected by P. pleco.lossicida infection. The WGCNA results showed that the metabolic process was strongly related to the entire immune *** P. pleco.lossicida, the expression levels of motility-related genes and flagellum assemblyrelated genes were significantly up-regulated. The results of this study may help to elucidate the interactions between L. crocea and ***.

关键词： Larimichthys crocea Pseudomonas pleco.lossicida Dual RNA-seq Host-pathogen interactions Dynamic transcriptome

Pseudostellaria heterophylla:Antioxidant Activity and Its Mechanism of Action

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Medicinal Plant 2021年第4期12卷 19-23页

作者： Huiqing PAN Yanda ZHANG Yufang MA Qi ZHAO fujian beidi Pharmaceutical co. Ltd.Ningde 355300China Municipal Enterprise Technical Center of fujian beidi Pharmaceutical co. Ltd.Ningde 355300China co.lege of Animal Sciences Fujian Agriculture and Forestry UniversityFuzhou 350002China

The tonic traditional Chinese medicine Pseudostellaria heterophylla both medicinal and nutritional *** has been applied to research in the field of modern aquaculture,and its anti-oxidant clinical trials have also beco.e a hot *** searching domestic and foreign literature databases to sort out related literature,the anti-oxidation property of *** was reviewed systematically from the three levels of in vitro chemical method,biological method and animal experiment *** this basis,the functional mechanism of the anti-oxidant activity of *** explored,in order to provide a reference for the follow-up in-depth research on the anti-oxidation of *** and the disco.ery and development of feed and health care value of *** the field of modern animal breeding.

关键词： Pseudostellaria heterophylla Antioxidant Mechanism