The development of uranyl ion detection technology has exhibited its significance in public security and environmental fields for the radioactivity and chemical toxicity of uranyl ion.The WHO standard of uranyl ion ma...The development of uranyl ion detection technology has exhibited its significance in public security and environmental fields for the radioactivity and chemical toxicity of uranyl ion.The WHO standard of uranyl ion makes it necessary to develop highly sensitive uranyl rapid warning system in drinking water monitoring.Herein,a visualized rapid warning system for trace uranyl ion is carried out based on electrochemiluminescence(ECL) imaging technology to give an ultra-low limit of detection(LOD) and high selectivity.Amidoxime,a bi-functional group with both uranyl ion capturing and co-reactive functions,is modified on a conjugated polymer backbone with strong ECL signal to be prepared into three-in-one polymer nanoparticles(PNPs) with self-enhanced ECL property.The captured uranyl ion can enhance the ECL signal of PNPs via resonance energy transfer process to give the LOD as 0.5 ng/L,which is much lower than the known luminescent uranyl sensors.Furthermore,ECL imaging technology is introduced into realizing visualized uranyl rapid warning,and can be successfully applied on natural water samples.This study provides a novel strategy for uranyl rapid warning,and shows its potential meaning in public security and environmental fields.展开更多
Container vessels navigate among the world＇s ports, frequently passing through narrow and congested waters. Due to the many layers of containers on a container vessel＇s decks, it is difficult for the crew to be awar...Container vessels navigate among the world＇s ports, frequently passing through narrow and congested waters. Due to the many layers of containers on a container vessel＇s decks, it is difficult for the crew to be aware of all fishing vessels and other obstacles in a container vessel＇s radar observation blind zone. This greatly increases the risk of collisions and other accidents. Given such great challenges to safe navigation and safety management with container vessels, their security risks are severe. An effective visual monitoring system can improve the safety of the water area surrounding container vessel by eliminating a vessel＇s observation blind zone, providing an effective safety measure for vessels navigating fishing zones and other troublesome areas. The system has other functions, such as accident recording, ship security, and monitoring of loading and unloading operations, thus ensuring the ship operates safely. Six months＇ trial operation showed that the system facilitates safe navigation of container vessels.展开更多
The construction of high-filled loess project has some engineering and technical challenges, such as excavation of earth and backfilling of earth are both large, complex construction environment, variety of influence ...The construction of high-filled loess project has some engineering and technical challenges, such as excavation of earth and backfilling of earth are both large, complex construction environment, variety of influence factors. According to this situation, this paper presents a dynamic 3D visualization method for high-filled project based on volume rendering. Through comparative analysis and visual analysis, realized at different times of the Loess fill internal detection data visualization and analysis presented. The results show that this visualization method can directly and accurately display the construction process, help decision makers master construction information and process.展开更多
Data-driven process monitoring methods are widely used in industrial tasks,with visual monitoring enabling operators to intuitively understand operational status,which is vital for maximizing industrial safety and pro...Data-driven process monitoring methods are widely used in industrial tasks,with visual monitoring enabling operators to intuitively understand operational status,which is vital for maximizing industrial safety and production efficiency.However,high-dimensional industrial data often exhibit complex structures,making the traditional 2D visualization methods ineffective at distinguishing different fault types.Thus,a visual process monitoring method that combines supervised uniform manifold approximation and projection with a label assignment strategy is proposed herein.First,the proposed supervised projection method enhances the visualization step by incorporating label information to guide the nonlinear dimensionality reduction process,improving the degrees of class separation and intraclass compactness.Then,to address the lack of label information for online samples,a label assignment strategy is designed.This strategy integrates kernel Fisher discriminant analysis and Bayesian inference,assigning different label types to online samples based on their confidence levels.Finally,upon integrating the label assignment strategy with the proposed supervised projection method,the assigned labels enhance the separability of online projections and enable the visualization of unknown data to some extent.The proposed method is validated on the Tennessee Eastman process and a real continuous catalytic reforming process,demonstrating superior visual fault monitoring and diagnosis performance to that of the state-of-the-art methods,especially in real industrial applications.展开更多
Functionalized black phosphorus(BP)nanosheets have been considered as promising nanoagents in cancer therapy due to their excellent photothermal conversion efficiency.However,it is still difficult to visually monitor ...Functionalized black phosphorus(BP)nanosheets have been considered as promising nanoagents in cancer therapy due to their excellent photothermal conversion efficiency.However,it is still difficult to visually monitor the dynamic localization of BP nanoagents in cancer cells.In this paper,we systematically studied the second-harmonic generation(SHG)signals originating from exfoliated BP nanosheets.Interestingly,under the excitation of a high frequency pulsed laser at 950 nm,the SHG signals of BP nanosheets in vitro are almost undetectable because of their poor stability.However,the intracellular SHG signals from BP nanosheets could be measured by in vivo optical imaging due to the efficient enrichment of living HeLa cells.Moreover,the SHG signal intensity from BP nanosheets increases with the prolonged incubation time.It can be expected that the BP nanosheets could be a promising intracellular SHG nanoprobe employed for visually in vivo biomedical imaging in practical cancer photothermal therapy(PIT).展开更多
Indicating hydrogels have shown the advantages of being fast, sensitive, and real-time in demonstrating the freshness of aquatic products due to their noticeable color change. In this work, an anti-freezing hydrogel e...Indicating hydrogels have shown the advantages of being fast, sensitive, and real-time in demonstrating the freshness of aquatic products due to their noticeable color change. In this work, an anti-freezing hydrogel embedded with pH-sensitive alizarin was developed as an original colorimetric indicator for monitoring the corruption of aquatic products at low temperatures. The anti-freezing hydrogel was prepared from 2-carboxyethyl acrylate, [2-(methacryloyloxy)ethyl]-trimethylammonium chloride, and 2-hydroxyethyl methacrylate monomers with triethylene glycol dimethacrylate as cross-linking agent. The hydrogel showed excellent anti-freezing capability, which was further incorporated with the pH-sensitive dye alizarin to gain the indicating capability. When applied in the indication of the freshness of salmon under low-temperature storage, it was found that the color changes of the indicator corresponded with the total volatile basic nitrogen contents of salmon, the correlation coefficient of which was 0.959 6. These results indicated the application potential of the hydrogels as freshness indicators during low-temperature storage or cold-chain transportation.展开更多
基金financially supported by the National Natural Science Foundation of China (Nos. U1867206, 21906115)State Key Laboratory of Analytical Chemistry for Life Science (No. SKLACLS2014)+1 种基金the China Postdoctoral Science Foundation (No. 2020T130456)the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)。
文摘The development of uranyl ion detection technology has exhibited its significance in public security and environmental fields for the radioactivity and chemical toxicity of uranyl ion.The WHO standard of uranyl ion makes it necessary to develop highly sensitive uranyl rapid warning system in drinking water monitoring.Herein,a visualized rapid warning system for trace uranyl ion is carried out based on electrochemiluminescence(ECL) imaging technology to give an ultra-low limit of detection(LOD) and high selectivity.Amidoxime,a bi-functional group with both uranyl ion capturing and co-reactive functions,is modified on a conjugated polymer backbone with strong ECL signal to be prepared into three-in-one polymer nanoparticles(PNPs) with self-enhanced ECL property.The captured uranyl ion can enhance the ECL signal of PNPs via resonance energy transfer process to give the LOD as 0.5 ng/L,which is much lower than the known luminescent uranyl sensors.Furthermore,ECL imaging technology is introduced into realizing visualized uranyl rapid warning,and can be successfully applied on natural water samples.This study provides a novel strategy for uranyl rapid warning,and shows its potential meaning in public security and environmental fields.
基金the Shanghai Leading Academic Discipline Project Foundation under Grant No.T0603
文摘Container vessels navigate among the world＇s ports, frequently passing through narrow and congested waters. Due to the many layers of containers on a container vessel＇s decks, it is difficult for the crew to be aware of all fishing vessels and other obstacles in a container vessel＇s radar observation blind zone. This greatly increases the risk of collisions and other accidents. Given such great challenges to safe navigation and safety management with container vessels, their security risks are severe. An effective visual monitoring system can improve the safety of the water area surrounding container vessel by eliminating a vessel＇s observation blind zone, providing an effective safety measure for vessels navigating fishing zones and other troublesome areas. The system has other functions, such as accident recording, ship security, and monitoring of loading and unloading operations, thus ensuring the ship operates safely. Six months＇ trial operation showed that the system facilitates safe navigation of container vessels.
基金Supported by Science and Technology Project of Anhui Province(No.1401b042009)the National Key Technology R&D Program(No.2013BAJ06B)
文摘The construction of high-filled loess project has some engineering and technical challenges, such as excavation of earth and backfilling of earth are both large, complex construction environment, variety of influence factors. According to this situation, this paper presents a dynamic 3D visualization method for high-filled project based on volume rendering. Through comparative analysis and visual analysis, realized at different times of the Loess fill internal detection data visualization and analysis presented. The results show that this visualization method can directly and accurately display the construction process, help decision makers master construction information and process.
基金supported by the National Key Research and Development Program of China(2022YFB3304701)the National Natural Science Foundation of China(62173145,62322303,62303186)+2 种基金the Natural Science Foundation of Shanghai under Grant 24ZR1415900the Shanghai Pilot Program for Basic Research(22TQ1400100-16)the State Key Laboratory of Industrial Control Technology,China(Grant No.ICT2024A26).
文摘Data-driven process monitoring methods are widely used in industrial tasks,with visual monitoring enabling operators to intuitively understand operational status,which is vital for maximizing industrial safety and production efficiency.However,high-dimensional industrial data often exhibit complex structures,making the traditional 2D visualization methods ineffective at distinguishing different fault types.Thus,a visual process monitoring method that combines supervised uniform manifold approximation and projection with a label assignment strategy is proposed herein.First,the proposed supervised projection method enhances the visualization step by incorporating label information to guide the nonlinear dimensionality reduction process,improving the degrees of class separation and intraclass compactness.Then,to address the lack of label information for online samples,a label assignment strategy is designed.This strategy integrates kernel Fisher discriminant analysis and Bayesian inference,assigning different label types to online samples based on their confidence levels.Finally,upon integrating the label assignment strategy with the proposed supervised projection method,the assigned labels enhance the separability of online projections and enable the visualization of unknown data to some extent.The proposed method is validated on the Tennessee Eastman process and a real continuous catalytic reforming process,demonstrating superior visual fault monitoring and diagnosis performance to that of the state-of-the-art methods,especially in real industrial applications.
基金This work has been partially supported by the National Key R&D Program of China(2018YFC0910602)the National Natural Science Foundation of China(31771584/62075137/61775145/61525503/61620106016/61835009)+4 种基金Project of Department of Education of Guangdong Province(2016KCXTD007)Guangdong Basic and Applied Basic Research Foundation(2020A1515010377)Guangdong Province Key Area R&D Program(2019B110233004)Shenzhen Basic Research Project(JCYJ20170818100153423)Science Foundation of Shenzhen University(Grant No.2017000193).
文摘Functionalized black phosphorus(BP)nanosheets have been considered as promising nanoagents in cancer therapy due to their excellent photothermal conversion efficiency.However,it is still difficult to visually monitor the dynamic localization of BP nanoagents in cancer cells.In this paper,we systematically studied the second-harmonic generation(SHG)signals originating from exfoliated BP nanosheets.Interestingly,under the excitation of a high frequency pulsed laser at 950 nm,the SHG signals of BP nanosheets in vitro are almost undetectable because of their poor stability.However,the intracellular SHG signals from BP nanosheets could be measured by in vivo optical imaging due to the efficient enrichment of living HeLa cells.Moreover,the SHG signal intensity from BP nanosheets increases with the prolonged incubation time.It can be expected that the BP nanosheets could be a promising intracellular SHG nanoprobe employed for visually in vivo biomedical imaging in practical cancer photothermal therapy(PIT).
基金the Key Program of Natural Science Foundation of Zhejiang Province(LZ15C200001)the Zhejiang Provincial Department of Agriculture and Rural Affairs(2022SNJF0202022SNJF069).
文摘Indicating hydrogels have shown the advantages of being fast, sensitive, and real-time in demonstrating the freshness of aquatic products due to their noticeable color change. In this work, an anti-freezing hydrogel embedded with pH-sensitive alizarin was developed as an original colorimetric indicator for monitoring the corruption of aquatic products at low temperatures. The anti-freezing hydrogel was prepared from 2-carboxyethyl acrylate, [2-(methacryloyloxy)ethyl]-trimethylammonium chloride, and 2-hydroxyethyl methacrylate monomers with triethylene glycol dimethacrylate as cross-linking agent. The hydrogel showed excellent anti-freezing capability, which was further incorporated with the pH-sensitive dye alizarin to gain the indicating capability. When applied in the indication of the freshness of salmon under low-temperature storage, it was found that the color changes of the indicator corresponded with the total volatile basic nitrogen contents of salmon, the correlation coefficient of which was 0.959 6. These results indicated the application potential of the hydrogels as freshness indicators during low-temperature storage or cold-chain transportation.
