The timely and effective investment risk assessment and forecasting are of great significance to ensure the investment safety and sustainable development of wind energy along the Belt and Road.In order to obtain the s...The timely and effective investment risk assessment and forecasting are of great significance to ensure the investment safety and sustainable development of wind energy along the Belt and Road.In order to obtain the scientific and real-time forecasting result,this paper constructs a novel hybrid intelligent model based on improved cloud model combined with GRA-TOPSIS and MBA-WLSSVM.Firstly,the factors influencing investment risk of wind energy along the Belt and Road are identified fromthree dimensions:endogenous risk,exogenous risk and process risk.Through the fuzzy threshold method,the final input index system is selected.Secondly,the risk evaluation method based on improved cloud model andGRA-TOPSIS is proposed.Thirdly,a modern intelligent model based on MBA-WLSSVMis designed.In modified bat algorithm(MBA),tent chaotic map is utilized to improve the basic bat algorithm,while weighted least squares support vector machine(WLSSVM)adopts wavelet kernel function to replace the traditional radial basis function to complete the model improvement.Finally,an example is given to verify the scientificity and accuracy of themodel,which is helpful for investors tomake fast and effective investment risk forecasting of wind energy along the Belt and Road.The example analysis proves that the proposedmodel can provide reference and basis for investment corpus to formulate the investment strategy in wind energy along the Belt and Road.展开更多
In recent visual tracking research,correlation filter(CF)based trackers become popular because of their high speed and considerable accuracy.Previous methods mainly work on the extension of features and the solution o...In recent visual tracking research,correlation filter(CF)based trackers become popular because of their high speed and considerable accuracy.Previous methods mainly work on the extension of features and the solution of the boundary effect to learn a better correlation filter.However,the related studies are insufficient.By exploring the potential of trackers in these two aspects,a novel adaptive padding correlation filter(APCF)with feature group fusion is proposed for robust visual tracking in this paper based on the popular context-aware tracking framework.In the tracker,three feature groups are fused by use of the weighted sum of the normalized response maps,to alleviate the risk of drift caused by the extreme change of single feature.Moreover,to improve the adaptive ability of padding for the filter training of different object shapes,the best padding is selected from the preset pool according to tracking precision over the whole video,where tracking precision is predicted according to the prediction model trained by use of the sequence features of the first several frames.The sequence features include three traditional features and eight newly constructed features.Extensive experiments demonstrate that the proposed tracker is superior to most state-of-the-art correlation filter based trackers and has a stable improvement compared to the basic trackers.展开更多
This article analyzed the ten strategic pillar industry clusters and the ten strategic emerging industry clusters which were confirmed and announced by Guangdong Province in May 2020 in addition to the 14 professional...This article analyzed the ten strategic pillar industry clusters and the ten strategic emerging industry clusters which were confirmed and announced by Guangdong Province in May 2020 in addition to the 14 professional groups of schools in Guangdong Province which were shortlisted in the"Double High Plan."With comparison and analysis,the degree of coincidence between the professional groups of higher vocational colleges and strategic industrial clusters in Guangdong Province which covered most of the industrial clusters was relatively high.The higher vocational colleges that were shortlisted in the"Double High Plan"still required dynamic adjustments in the construction of professional groups to achieve an allrounded integration of the supply of talents and industrial demands.展开更多
To explore the establishment of a tissue culture and rapid propagation system of Tilia amurensis,the effects of basic medium and concentrations and ratios of plant growth regulators on tissue culture and rapid propaga...To explore the establishment of a tissue culture and rapid propagation system of Tilia amurensis,the effects of basic medium and concentrations and ratios of plant growth regulators on tissue culture and rapid propagation of T.amurensis were studied.The results showed that 1/2 MS medium was the most suitable proliferation medium,and the proliferation coefficient could reach 13.5 after adding 0.05 mg/L 6-BA and 0.03 mg/L IBA;MS medium was the most suitable medium for strong plantlets and rooting,and the best medium for strong plantlets was MS+0.1 mg/L 6-BA+0.1 mg/L IBA+0.03 mg/L GA_(3),with which the average plantlet height reached 5.15 cm;and the best rooting medium was MS+1.0 mg/L6-BA+0.05 mg/L NAA,with which the rooting rate was 93.3%and the number of roots was 5.7 roots.展开更多
Host-associated microbiota can significantly impact host fitness.Therefore,naturally occurring variations in microbiota may influence the health and persistence of their hosts.This finding is particularly important in...Host-associated microbiota can significantly impact host fitness.Therefore,naturally occurring variations in microbiota may influence the health and persistence of their hosts.This finding is particularly important in reintroduced animals,as they typically experience habitat changes during translocations.However,little is known about how microbiomes are altered in response to conservation translocation.Here,we accessed the gut microbiome of Przewalski’s horse(Equus przewalskii)populations in China from three nature reserves(i.e.Xinjiang Kalamaili Nature Reserve,KNR;Dunhuang Xihu National Nature Reserve,DXNNR;and Anxi Extreme-arid Desert Nature Reserve,AENR)using 16s rRNA gene and metagenome sequencing.The results showed that the microbial composition and function differed significantly across locations,while a subset of core taxa was consistently present in most of the samples.The abundance of genes encoding microbe-produced enzymes involved in the metabolism of carbohydrates,especially for glycoside hydrolases,was significantly higher in open-spaced KNR populations than in more confined AENR individuals.This study offers detailed and significant differential characters related to the microbial community and metabolic pathways in various reintroduced sites of Przewalski’s horse,which might provide a basis for future microecological and conservation research on endangered reintroduced animals.展开更多
Captive conditions can affect the symbiotic microbiome of animals.In this study,we compared the structural and functional differences of the gastrointestinal microbiomes of wild Bactrian camels(Camelus ferus)between w...Captive conditions can affect the symbiotic microbiome of animals.In this study,we compared the structural and functional differences of the gastrointestinal microbiomes of wild Bactrian camels(Camelus ferus)between wild and captive populations,as well as their different host energy utilization performances through metagenomics.The results showed that wild-living camels harbored more microbial taxa related to the production of volatile fatty acids,fewer methanogens,and fewer genes encoding enzymes involved in methanogenesis,leading to higher energy utilization efficiency compared to that of captive-living camels.These findings suggest that the wild-living camel fecal microbiome demonstrates a series of adaptive characteristics that enable the host to adjust to a relatively barren field environment.Our study provides novel insights into the mechanisms of wildlife adaptations to habitats from the perspective of the microbiome.展开更多
Microwave can be used to accelerate chemical reaction and improve the rate of production. Does microwave only act as a heating factor? Do there exist any specific effects? These questions are still holding a violent c...Microwave can be used to accelerate chemical reaction and improve the rate of production. Does microwave only act as a heating factor? Do there exist any specific effects? These questions are still holding a violent controversy. Here we will choose the Belousov-Zhabotinsky reaction, which is sensitive to surrounding effects, to study the influence of microwave on chemical reactions. Visible changes of periods have been observed. It appeares that there could have been specific effects of microwave.展开更多
基金This work is supported by the Fundamental Research Funds for the Central Universities,China(Project No.2018MS148).
文摘The timely and effective investment risk assessment and forecasting are of great significance to ensure the investment safety and sustainable development of wind energy along the Belt and Road.In order to obtain the scientific and real-time forecasting result,this paper constructs a novel hybrid intelligent model based on improved cloud model combined with GRA-TOPSIS and MBA-WLSSVM.Firstly,the factors influencing investment risk of wind energy along the Belt and Road are identified fromthree dimensions:endogenous risk,exogenous risk and process risk.Through the fuzzy threshold method,the final input index system is selected.Secondly,the risk evaluation method based on improved cloud model andGRA-TOPSIS is proposed.Thirdly,a modern intelligent model based on MBA-WLSSVMis designed.In modified bat algorithm(MBA),tent chaotic map is utilized to improve the basic bat algorithm,while weighted least squares support vector machine(WLSSVM)adopts wavelet kernel function to replace the traditional radial basis function to complete the model improvement.Finally,an example is given to verify the scientificity and accuracy of themodel,which is helpful for investors tomake fast and effective investment risk forecasting of wind energy along the Belt and Road.The example analysis proves that the proposedmodel can provide reference and basis for investment corpus to formulate the investment strategy in wind energy along the Belt and Road.
基金supported by the National KeyResearch and Development Program of China(2018AAA0103203)the National Natural Science Foundation of China(62073036,62076031)the Beijing Natural Science Foundation(4202071)。
文摘In recent visual tracking research,correlation filter(CF)based trackers become popular because of their high speed and considerable accuracy.Previous methods mainly work on the extension of features and the solution of the boundary effect to learn a better correlation filter.However,the related studies are insufficient.By exploring the potential of trackers in these two aspects,a novel adaptive padding correlation filter(APCF)with feature group fusion is proposed for robust visual tracking in this paper based on the popular context-aware tracking framework.In the tracker,three feature groups are fused by use of the weighted sum of the normalized response maps,to alleviate the risk of drift caused by the extreme change of single feature.Moreover,to improve the adaptive ability of padding for the filter training of different object shapes,the best padding is selected from the preset pool according to tracking precision over the whole video,where tracking precision is predicted according to the prediction model trained by use of the sequence features of the first several frames.The sequence features include three traditional features and eight newly constructed features.Extensive experiments demonstrate that the proposed tracker is superior to most state-of-the-art correlation filter based trackers and has a stable improvement compared to the basic trackers.
文摘This article analyzed the ten strategic pillar industry clusters and the ten strategic emerging industry clusters which were confirmed and announced by Guangdong Province in May 2020 in addition to the 14 professional groups of schools in Guangdong Province which were shortlisted in the"Double High Plan."With comparison and analysis,the degree of coincidence between the professional groups of higher vocational colleges and strategic industrial clusters in Guangdong Province which covered most of the industrial clusters was relatively high.The higher vocational colleges that were shortlisted in the"Double High Plan"still required dynamic adjustments in the construction of professional groups to achieve an allrounded integration of the supply of talents and industrial demands.
基金Supported by Key R&D Program of Shandong Province(2017GNC10112)。
文摘To explore the establishment of a tissue culture and rapid propagation system of Tilia amurensis,the effects of basic medium and concentrations and ratios of plant growth regulators on tissue culture and rapid propagation of T.amurensis were studied.The results showed that 1/2 MS medium was the most suitable proliferation medium,and the proliferation coefficient could reach 13.5 after adding 0.05 mg/L 6-BA and 0.03 mg/L IBA;MS medium was the most suitable medium for strong plantlets and rooting,and the best medium for strong plantlets was MS+0.1 mg/L 6-BA+0.1 mg/L IBA+0.03 mg/L GA_(3),with which the average plantlet height reached 5.15 cm;and the best rooting medium was MS+1.0 mg/L6-BA+0.05 mg/L NAA,with which the rooting rate was 93.3%and the number of roots was 5.7 roots.
基金We are grateful to rangers and staff members at the Xinjiang Kalamaili Nature Reserve,the Anxi Extremearid Desert Nature Reserve,and the Dunhuang Xihu National Nature Reserve for their support in sample collection.We would like to thank Editage(www.editage.cn)for English language editing.This work was supported by the Beijing Forestry University Outstanding Young Talent Cultivation Project[grant number 2019JQ03018]the Postdoctoral Innovative Talents Support Program[grant number BX20190042]+1 种基金the China Postdoctoral Science Foundation[grant number 2020M670177]L.T.acknowledges support from China Scholarship Council for her study at the University of Oxford(No.201906510039).
文摘Host-associated microbiota can significantly impact host fitness.Therefore,naturally occurring variations in microbiota may influence the health and persistence of their hosts.This finding is particularly important in reintroduced animals,as they typically experience habitat changes during translocations.However,little is known about how microbiomes are altered in response to conservation translocation.Here,we accessed the gut microbiome of Przewalski’s horse(Equus przewalskii)populations in China from three nature reserves(i.e.Xinjiang Kalamaili Nature Reserve,KNR;Dunhuang Xihu National Nature Reserve,DXNNR;and Anxi Extreme-arid Desert Nature Reserve,AENR)using 16s rRNA gene and metagenome sequencing.The results showed that the microbial composition and function differed significantly across locations,while a subset of core taxa was consistently present in most of the samples.The abundance of genes encoding microbe-produced enzymes involved in the metabolism of carbohydrates,especially for glycoside hydrolases,was significantly higher in open-spaced KNR populations than in more confined AENR individuals.This study offers detailed and significant differential characters related to the microbial community and metabolic pathways in various reintroduced sites of Przewalski’s horse,which might provide a basis for future microecological and conservation research on endangered reintroduced animals.
基金This study was funded by the Beijing Forestry University Outstanding Young Talent Cultivation Project(No.2019JQ03018)Postdoctoral Innovative Talents Support Program(No.BX20190042)China Postdoctoral Science Foundation(2020M670177).
文摘Captive conditions can affect the symbiotic microbiome of animals.In this study,we compared the structural and functional differences of the gastrointestinal microbiomes of wild Bactrian camels(Camelus ferus)between wild and captive populations,as well as their different host energy utilization performances through metagenomics.The results showed that wild-living camels harbored more microbial taxa related to the production of volatile fatty acids,fewer methanogens,and fewer genes encoding enzymes involved in methanogenesis,leading to higher energy utilization efficiency compared to that of captive-living camels.These findings suggest that the wild-living camel fecal microbiome demonstrates a series of adaptive characteristics that enable the host to adjust to a relatively barren field environment.Our study provides novel insights into the mechanisms of wildlife adaptations to habitats from the perspective of the microbiome.
文摘Microwave can be used to accelerate chemical reaction and improve the rate of production. Does microwave only act as a heating factor? Do there exist any specific effects? These questions are still holding a violent controversy. Here we will choose the Belousov-Zhabotinsky reaction, which is sensitive to surrounding effects, to study the influence of microwave on chemical reactions. Visible changes of periods have been observed. It appeares that there could have been specific effects of microwave.
