Lee–Yang theory clearly demonstrates where the phase transition of many-body systems occurs and the asymptotic behavior near the phase transition using the partition function under complex parameters. The complex par...Lee–Yang theory clearly demonstrates where the phase transition of many-body systems occurs and the asymptotic behavior near the phase transition using the partition function under complex parameters. The complex parameters make the direct investigation of Lee–Yang theory in practical systems challenging. Here we construct a non-Hermitian quantum system that can correspond to the one-dimensional Ising model with imaginary parameters through the equality of partition functions. By adjusting the non-Hermitian parameter,we successfully obtain the partition function under different imaginary magnetic fields and observe the Lee–Yang zeros. We also observe the critical behavior of free energy in vicinity of Lee–Yang zero that is consistent with theoretical prediction. Our work provides a protocol to study Lee–Yang zeros of the one-dimensional Ising model using a single-qubit non-Hermitian system.展开更多
Tencel fiber, as a new type of green environmental protection fiber, is drawing attention from the society and people’s favorite. In paper, the spinning process and properties of tencel yarn were studied. Also tradit...Tencel fiber, as a new type of green environmental protection fiber, is drawing attention from the society and people’s favorite. In paper, the spinning process and properties of tencel yarn were studied. Also traditional cotton yarn was tested and compared to understand tencel better as they are now both widely used in apparel. Compared with cotton yarn of the same count, the weight CV of tencel quality is lower, while the twist CV is higher;breaking elongation of tencel yarn is larger, while CV of breaking elongation of tencel yarn is slightly higher;unevenness of tencel spinning yarn is lower.展开更多
Soil improvement is one of the most important issues in geotechnical engineering practice.The wide application of traditional improvement techniques(cement/chemical materials)are limited due to damage ecological en-vi...Soil improvement is one of the most important issues in geotechnical engineering practice.The wide application of traditional improvement techniques(cement/chemical materials)are limited due to damage ecological en-vironment and intensify carbon emissions.However,the use of microbially induced calcium carbonate pre-cipitation(MICP)to obtain bio-cement is a novel technique with the potential to induce soil stability,providing a low-carbon,environment-friendly,and sustainable integrated solution for some geotechnical engineering pro-blems in the environment.This paper presents a comprehensive review of the latest progress in soil improvement based on the MICP strategy.It systematically summarizes and overviews the mineralization mechanism,influ-encing factors,improved methods,engineering characteristics,and current field application status of the MICP.Additionally,it also explores the limitations and correspondingly proposes prospective applications via the MICP approach for soil improvement.This review indicates that the utilization of different environmental calcium-based wastes in MICP and combination of materials and MICP are conducive to meeting engineering and market demand.Furthermore,we recommend and encourage global collaborative study and practice with a view to commercializing MICP technique in the future.The current review purports to provide insights for engineers and interdisciplinary researchers,and guidance for future engineering applications.展开更多
Using the new soft X-ray data from the Macao Science Satellite-1,we studied a solar flare that occurred on 22 June 2023.We found that the centroids of the Ca(around 3.9 keV)and Fe(around 6.7 keV)line features exhibit ...Using the new soft X-ray data from the Macao Science Satellite-1,we studied a solar flare that occurred on 22 June 2023.We found that the centroids of the Ca(around 3.9 keV)and Fe(around 6.7 keV)line features exhibit a rapid shift toward higher energy channels during the flare's rising phase,followed by a gradual decrease during the decay phase.Through precise energy calibration,the centroids are determined with high accuracy.Temperature and velocity are then self-consistently derived by comparing the centroids with those calculated from the synthesized line features using the latest CHIANTI atomic database(ver.10.1).The calculated maximum velocity reaches up to 710±60 km s-1,which significantly exceeds the previously reported values.Our results suggest that the entire shift of soft X-ray lines may occur during the process of chromospheric evaporation.展开更多
This work presents a method for the three-dimensional localization of individual shallow NV center in diamond,leveraging the near-field quenching effect of a gold tip.Our experimental setup involves the use of an atom...This work presents a method for the three-dimensional localization of individual shallow NV center in diamond,leveraging the near-field quenching effect of a gold tip.Our experimental setup involves the use of an atomic force microscope to precisely move the gold tip close to the NV center,while simultaneously employing a home-made confocal microscope to monitor the fluorescence of the NV center.This approach allows for lateral super-resolution,achieving a full width at half maximum(FWHM)of 38.0 nm and a location uncertainty of 0.7 nm.Additionally,we show the potential of this method for determining the depth of the NV centers.We also attempt to determine the depth of the NV centers in combination with finite-difference time-domain(FDTD)simulations.Compared to other depth determination methods,this approach allows for simultaneous lateral and longitudinal localization of individual NV centers,and holds promise for facilitating manipulation of the local environment surrounding the NV center.展开更多
Chairs are the most common furniture in household environments,and reclining chairs specifically cater to the functional needs of the elderly.With the gradually increasing aging population,our preliminary research has...Chairs are the most common furniture in household environments,and reclining chairs specifically cater to the functional needs of the elderly.With the gradually increasing aging population,our preliminary research has revealed that current reclining chair designs often fail to align with the physical dimensions and needs of older adults.Many designs appear to prioritize technology over usability,resulting in a homogenous product landscape.Using statistical analysis and the weighted average method,an elderly-friendly reclining chair that considers height,depth,and width is designed.The final design aims to meet the psychological and physiological needs of self-care,semi-dependent,and fully dependent elderly individuals.Adhering to the“people-oriented”design philosophy and targeting“convenience and efficiency,”our ultimate goal is to create a reclining chair that helps the elderly lie down,stand up,and sit down with dignity.This innovative approach offers a new perspective for the market of aging-friendly furniture.展开更多
Objective:To develop and validate a risk prediction model for catheter-related thrombosis(CRT)in pediatric patients with severe traumatic brain injury(sTBI).Methods:Using convenience sampling,216 pediatric patients wi...Objective:To develop and validate a risk prediction model for catheter-related thrombosis(CRT)in pediatric patients with severe traumatic brain injury(sTBI).Methods:Using convenience sampling,216 pediatric patients with sTBI admitted to the Surgical Intensive Care Unit of Kunming Children’s Hospital between June 2022 and May 2025 were enrolled and randomly divided into a training set of 151 cases and a validation set of 65 cases.Influencing factors were identified through univariate analysis and logistic regression analysis to construct the prediction model.The model’s discrimination and calibration were evaluated by the area under the receiver operating characteristic(ROC)curve(AUC)and the Hosmer–Lemeshow goodness-of-fit test.Results:Univariate analysis showed that admission GCS score,CVC insertion site,D-dimer level,and duration of mechanical ventilation were risk factors for CRT in children with sTBI(P<0.05).The logistic regression equation was constructed as follows:Logit(P)=2.74–1.95×GCS score+0.25×D-dimer(μg/mL)+0.02×duration of mechanical ventilation(h).Based on this model,the AUC was 0.87 in the training set and 0.88 in the validation set.The Hosmer–Lemeshow goodness-of-fit test indicated good agreement between the model’s calibration curve and the ideal curve.Conclusion:The developed prediction model demonstrates good predictive performance and can serve as a reference for the early clinical identification of CRT risk in pediatric patients with sTBI.展开更多
Piperidine is a crucial pharmacophore and a special scaffold in the realm of drug discovery.Its flexibility increases the molecule’s capability to bind to the receptor.The piperidine-containing compounds are distingu...Piperidine is a crucial pharmacophore and a special scaffold in the realm of drug discovery.Its flexibility increases the molecule’s capability to bind to the receptor.The piperidine-containing compounds are distinguished by their remarkable activity,and are increasingly becoming a vital category of pesticides.In this review,the research progress of piperidines in the discovery of pesticides was updated according to their active characteristics.The structure-activity relationships(SARs),and mechanisms of action of piperidine-containing compounds were also discussed.This article is meant to enable readers to quickly understand piperidines,while providing ideas for creating piperidines with novel structures and unique mechanisms of action.展开更多
Artificial photosynthesis of hydrogen peroxide(H_(2)O_(2))using covalent organic frameworks(COFs)as photocatalysts holds promise for future applications.However,the influence of linkage chemistry on the photoelectroch...Artificial photosynthesis of hydrogen peroxide(H_(2)O_(2))using covalent organic frameworks(COFs)as photocatalysts holds promise for future applications.However,the influence of linkage chemistry on the photoelectrochemical properties and photocatalytic performance of COFs remains a significant challenge.Herein,we designed and synthesized a model system with different linkages,including imine-,amine-,azo-linked COFs,then investigated their photocatalytic activity of overall H_(2)O_(2)production.The photocatalytic results revealed varying activities for H_(2)O_(2)synthesis among these COFs,with the azo-linked TTA-Azo-COF(COF synthesized by 4,4’,4’’-(1,3,5-triazine-2,4,6-triyl)-trianiline and terephthalaldehyde)demonstrating the highest overall H2O2 photosynthesis activity of 2516μmol g^(–1)h^(–1)in an O2 atmosphere without any sacrificial agents,which is 6.72 and 2.85 times higher than that of imine-linked TTA-COF and amine-linked TTA-COF-AR,respectively.Furthermore,TTA-Azo-COF maintained a high photosynthesis H2O2 activity of 2116μmol g^(–1)h^(–1)under an air atmosphere,outperforming most COF-based photocatalytic systems under similar reaction conditions.Further characterizations and density functional theory calculations reveal these various linkages in different COFs result in distinct visible-light absorption,charge transfer capacities and formation energy barriers of key intermediates.This work revealed the significant impact of linkages on COFs and provided comprehensive guidance for the rational design of COFs with tailored linkages to fulfill specific requirements for future applications.展开更多
Photocatalytic technology has attracted much attention in the fields of clean energy and environmental governance.However,how to design and develop highly efficient photocatalytic materials remains an urgent scientifi...Photocatalytic technology has attracted much attention in the fields of clean energy and environmental governance.However,how to design and develop highly efficient photocatalytic materials remains an urgent scientific problem to be solved.This study focuses on enhancing photocatalytic activity through microstructure modification.Among them,ToRed-4 showed the most prominent performance.Under the illumination condition of 420 nm,its value was 13506 lmol g^(-1) h^(-1),which was approximately 18 times that of CN550(bulk g-C_(3)N_(4))(719 lmol g^(-1) h^(-1)).By using DFT calculations,the photocatalytic performance was deeply analyzed,revealing the significant advantages of the ToRed series in key performance indicators and the underlying synergy mechanisms,including the reduction of the HOMO-LUMO energy gap,the efficient separation of electron holes,the expansion of the electronic transition range,the transformation of the electrostatic potential distribution,the increase in dipole moment,and the optimization of the Coulomb attractive energy.The research results of this study provide a key basis for opening up new avenues for the design and development of highly efficient photocatalytic materials and are expected to play an important role in related fields.展开更多
Combining optical tweezers with fluorescence microscopy is a powerful tool for single-cell analysis,playing a pivotal role in disease diagnosis,cell sorting,and the investigation of cellular dynamics.However,fluoresce...Combining optical tweezers with fluorescence microscopy is a powerful tool for single-cell analysis,playing a pivotal role in disease diagnosis,cell sorting,and the investigation of cellular dynamics.However,fluorescence detection faces challenges such as blinking,photobleaching and autofluorescence in biotissues.To address these limitations,we developed a magnetic detection strategy by integrating quantum magnetometry using nitrogen-vacancy centers into optical tweezers,demonstrating precise trapping and manipulation of individual cells in microfluidic environment.We detected a magnetic signal of 89μT from a single cell labeled with magnetic nanoparticles,compared to a noise floor of 3.9μT observed in unlabeled cells.This platform provides a promising approach for high-precision single-cell analysis and holds significant potential for probing cellular activities within biological microenvironments.展开更多
The ion channel in neurons is the basic component of signal transmission in the nervous system.The ion channel has important effects on the potential of neuron release and dynamic behavior in neural networks.Ion chann...The ion channel in neurons is the basic component of signal transmission in the nervous system.The ion channel has important effects on the potential of neuron release and dynamic behavior in neural networks.Ion channels control the flow of ions into and out of the cell membrane to form an ion current,which makes the excitable membrane produce special potential changes and become the basis of nerve and muscle activity.The blockage of ion channels has a significant effect on the dynamics of neurons and networks.Therefore,it is very meaningful to study the influence of ion channels on neuronal dynamics.In this work,a hybrid ion channel is designed by connecting a charge-controlled memristor(CCM)with an inductor in series,and a magnetic flux-controlled memristor(MFCM),capacitor,and nonlinear resistor are connected in parallel with the mixed ion channel to obtain the memristor neural circuit.Furthermore,the oscillator model with a hybrid ion channel and its energy function are calculated,and a map neuron is obtained by linearizing the neuron oscillator model.In addition,an adaptive regulation method is designed to explore the adaptive regulation of energy on the dynamic behaviors of the map neuron.The results show that the dynamics of a map neuron with a hybrid ion channel can be controlled by parameters and external magnetic fields.This study is also used to research synchronization between map neurons and collective behaviors in the map neurons network.展开更多
The analysis of structure and dynamics in chaotic systems has long been a significant research direction in nonlinear science.Constructing a reliable chaotic system with rich dynamical characteristics is essential for...The analysis of structure and dynamics in chaotic systems has long been a significant research direction in nonlinear science.Constructing a reliable chaotic system with rich dynamical characteristics is essential for secure communication applications.Existing memristor-based chaotic maps are typically obtained by incorporating discrete mathematical models of memristors into basic chaotic maps.In this study,a simple memristive nonlinear circuit is first designed,from which a memristive oscillator is derived.Subsequently,a memristive map is developed from this oscillator through a linear transformation of the variables.The reliability of the new map is validated through nonlinear dynamic analysis.The results demonstrate that the map exhibits complex nonlinear dynamics under different parameter settings.This finding is beneficial for the construction of memristor maps and the development of image encryption algorithms.展开更多
<strong>Objective:</strong> The purpose of this study was to explore the clinical efficacy and security of the treatment of popliteal cyst through radiofrequency thermocoagulation (RFT) under ultrasound gu...<strong>Objective:</strong> The purpose of this study was to explore the clinical efficacy and security of the treatment of popliteal cyst through radiofrequency thermocoagulation (RFT) under ultrasound guidance. <strong>Methods:</strong> The clinical data of 35 patients with popliteal cyst, who were treated by RFT under ultrasound guidance from June 2019 to June 2020, were retrospectively analyzed. The Visual Analogue Scores (VAS) and the size of cyst before and after treatment were recorded at the first month, the third month, the sixth month. After six months, the recovery rate of Rauschning and Lindgren classification (R-L classification) level 0, 0 - I were counted. All the complications of the patients were observed. <strong>Results:</strong> 32 patients were followed up for six months. The scores and cyst sizes of each patient before and after the treatment were on a normal distribution curve. There was no significant difference in VAS scores before and after the treatment (P > 0.05). However, there was a significant difference in cyst sizes before and after the treatment (P < 0.05). Moreover, there was no significant difference in VAS scores and cyst sizes in each period after treatment (P > 0.05). According to the R-L classification in 6 months after treatment: the recovery rate of class 0 was 62.5% and class 0 - I level was 87.5%. There were no serious complications in the process. <strong>Conclusion:</strong> Treatment of popliteal cyst through RFT under ultrasound guidance is a simple, easy, reliable method that is worthy of clinical promotion.展开更多
基金supported by the National Key R&D Program of China (Grant No. 2021YFB3202800)the National Natural Science Foundation of China (Grant No. 12174373)+2 种基金the Chinese Academy of Sciences (Grant No. GJJSTD20200001)the Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0302200)Anhui Initiative in Quantum Information Technologies (Grant No. AHY050000)。
文摘Lee–Yang theory clearly demonstrates where the phase transition of many-body systems occurs and the asymptotic behavior near the phase transition using the partition function under complex parameters. The complex parameters make the direct investigation of Lee–Yang theory in practical systems challenging. Here we construct a non-Hermitian quantum system that can correspond to the one-dimensional Ising model with imaginary parameters through the equality of partition functions. By adjusting the non-Hermitian parameter,we successfully obtain the partition function under different imaginary magnetic fields and observe the Lee–Yang zeros. We also observe the critical behavior of free energy in vicinity of Lee–Yang zero that is consistent with theoretical prediction. Our work provides a protocol to study Lee–Yang zeros of the one-dimensional Ising model using a single-qubit non-Hermitian system.
文摘Tencel fiber, as a new type of green environmental protection fiber, is drawing attention from the society and people’s favorite. In paper, the spinning process and properties of tencel yarn were studied. Also traditional cotton yarn was tested and compared to understand tencel better as they are now both widely used in apparel. Compared with cotton yarn of the same count, the weight CV of tencel quality is lower, while the twist CV is higher;breaking elongation of tencel yarn is larger, while CV of breaking elongation of tencel yarn is slightly higher;unevenness of tencel spinning yarn is lower.
基金funded by the National Natural Science Foundation of China(No.41962016)the Natural Science Foundation of NingXia(Nos.2023AAC02023,2023A1218,and 2021AAC02006).
文摘Soil improvement is one of the most important issues in geotechnical engineering practice.The wide application of traditional improvement techniques(cement/chemical materials)are limited due to damage ecological en-vironment and intensify carbon emissions.However,the use of microbially induced calcium carbonate pre-cipitation(MICP)to obtain bio-cement is a novel technique with the potential to induce soil stability,providing a low-carbon,environment-friendly,and sustainable integrated solution for some geotechnical engineering pro-blems in the environment.This paper presents a comprehensive review of the latest progress in soil improvement based on the MICP strategy.It systematically summarizes and overviews the mineralization mechanism,influ-encing factors,improved methods,engineering characteristics,and current field application status of the MICP.Additionally,it also explores the limitations and correspondingly proposes prospective applications via the MICP approach for soil improvement.This review indicates that the utilization of different environmental calcium-based wastes in MICP and combination of materials and MICP are conducive to meeting engineering and market demand.Furthermore,we recommend and encourage global collaborative study and practice with a view to commercializing MICP technique in the future.The current review purports to provide insights for engineers and interdisciplinary researchers,and guidance for future engineering applications.
文摘Using the new soft X-ray data from the Macao Science Satellite-1,we studied a solar flare that occurred on 22 June 2023.We found that the centroids of the Ca(around 3.9 keV)and Fe(around 6.7 keV)line features exhibit a rapid shift toward higher energy channels during the flare's rising phase,followed by a gradual decrease during the decay phase.Through precise energy calibration,the centroids are determined with high accuracy.Temperature and velocity are then self-consistently derived by comparing the centroids with those calculated from the synthesized line features using the latest CHIANTI atomic database(ver.10.1).The calculated maximum velocity reaches up to 710±60 km s-1,which significantly exceeds the previously reported values.Our results suggest that the entire shift of soft X-ray lines may occur during the process of chromospheric evaporation.
基金supported by the National Natural Science Foundation of China(T2325023,92265204,12104447)the National Key R&D Program of China(2023YFF0718400)+1 种基金the Innovation Program for Quantum Science and Technology(2021ZD0302200)the Fundamental Research Funds for the Central Universities。
文摘This work presents a method for the three-dimensional localization of individual shallow NV center in diamond,leveraging the near-field quenching effect of a gold tip.Our experimental setup involves the use of an atomic force microscope to precisely move the gold tip close to the NV center,while simultaneously employing a home-made confocal microscope to monitor the fluorescence of the NV center.This approach allows for lateral super-resolution,achieving a full width at half maximum(FWHM)of 38.0 nm and a location uncertainty of 0.7 nm.Additionally,we show the potential of this method for determining the depth of the NV centers.We also attempt to determine the depth of the NV centers in combination with finite-difference time-domain(FDTD)simulations.Compared to other depth determination methods,this approach allows for simultaneous lateral and longitudinal localization of individual NV centers,and holds promise for facilitating manipulation of the local environment surrounding the NV center.
基金Chongqing University of Engineering Internal Fund Key Project in Natural Sciences:Research on Spatial Syntax Parameters and Combination Patterns of Elderly Care Centers in Urban and Rural Communities from a Multidimensional Logical Perspective(Project No:XJXM202412014)。
文摘Chairs are the most common furniture in household environments,and reclining chairs specifically cater to the functional needs of the elderly.With the gradually increasing aging population,our preliminary research has revealed that current reclining chair designs often fail to align with the physical dimensions and needs of older adults.Many designs appear to prioritize technology over usability,resulting in a homogenous product landscape.Using statistical analysis and the weighted average method,an elderly-friendly reclining chair that considers height,depth,and width is designed.The final design aims to meet the psychological and physiological needs of self-care,semi-dependent,and fully dependent elderly individuals.Adhering to the“people-oriented”design philosophy and targeting“convenience and efficiency,”our ultimate goal is to create a reclining chair that helps the elderly lie down,stand up,and sit down with dignity.This innovative approach offers a new perspective for the market of aging-friendly furniture.
基金Health Science Research Project of Kunming Health Committee,Yunnan Province(Project No.:2023-14-04-008)。
文摘Objective:To develop and validate a risk prediction model for catheter-related thrombosis(CRT)in pediatric patients with severe traumatic brain injury(sTBI).Methods:Using convenience sampling,216 pediatric patients with sTBI admitted to the Surgical Intensive Care Unit of Kunming Children’s Hospital between June 2022 and May 2025 were enrolled and randomly divided into a training set of 151 cases and a validation set of 65 cases.Influencing factors were identified through univariate analysis and logistic regression analysis to construct the prediction model.The model’s discrimination and calibration were evaluated by the area under the receiver operating characteristic(ROC)curve(AUC)and the Hosmer–Lemeshow goodness-of-fit test.Results:Univariate analysis showed that admission GCS score,CVC insertion site,D-dimer level,and duration of mechanical ventilation were risk factors for CRT in children with sTBI(P<0.05).The logistic regression equation was constructed as follows:Logit(P)=2.74–1.95×GCS score+0.25×D-dimer(μg/mL)+0.02×duration of mechanical ventilation(h).Based on this model,the AUC was 0.87 in the training set and 0.88 in the validation set.The Hosmer–Lemeshow goodness-of-fit test indicated good agreement between the model’s calibration curve and the ideal curve.Conclusion:The developed prediction model demonstrates good predictive performance and can serve as a reference for the early clinical identification of CRT risk in pediatric patients with sTBI.
基金financial support from the National Natural Science Foundation of China(No.32072445)the Science and Technology Plan Project of Guizhou Province(Qiankehezhicheng[2024]the general 083)+7 种基金the Program of Introducing Talents to Chinese Universities(No.D20023)the Central Government Guides Local Science and Technology Development Fund Projects(Qiankehezhongyindi(2023)001)the Technology Achievement Transformation(general project)of Guizhou Province(Qiankehechengguo[2022]the general 063)Key Agricultural Technology R&D Projects of the Xinjiang Production and Construction Corps(NYHXGG,No.2023AA602)the Frontiers Science Centre for Asymmetric Synthesis and Medicinal MoleculesDepartment of EducationGuizhou Province[Qianjiaohe KY(2020)004]the specific research fund of TheInnovation Platform for Academicians of Hainan Province(No.SQ2020PTZ0009)。
文摘Piperidine is a crucial pharmacophore and a special scaffold in the realm of drug discovery.Its flexibility increases the molecule’s capability to bind to the receptor.The piperidine-containing compounds are distinguished by their remarkable activity,and are increasingly becoming a vital category of pesticides.In this review,the research progress of piperidines in the discovery of pesticides was updated according to their active characteristics.The structure-activity relationships(SARs),and mechanisms of action of piperidine-containing compounds were also discussed.This article is meant to enable readers to quickly understand piperidines,while providing ideas for creating piperidines with novel structures and unique mechanisms of action.
文摘Artificial photosynthesis of hydrogen peroxide(H_(2)O_(2))using covalent organic frameworks(COFs)as photocatalysts holds promise for future applications.However,the influence of linkage chemistry on the photoelectrochemical properties and photocatalytic performance of COFs remains a significant challenge.Herein,we designed and synthesized a model system with different linkages,including imine-,amine-,azo-linked COFs,then investigated their photocatalytic activity of overall H_(2)O_(2)production.The photocatalytic results revealed varying activities for H_(2)O_(2)synthesis among these COFs,with the azo-linked TTA-Azo-COF(COF synthesized by 4,4’,4’’-(1,3,5-triazine-2,4,6-triyl)-trianiline and terephthalaldehyde)demonstrating the highest overall H2O2 photosynthesis activity of 2516μmol g^(–1)h^(–1)in an O2 atmosphere without any sacrificial agents,which is 6.72 and 2.85 times higher than that of imine-linked TTA-COF and amine-linked TTA-COF-AR,respectively.Furthermore,TTA-Azo-COF maintained a high photosynthesis H2O2 activity of 2116μmol g^(–1)h^(–1)under an air atmosphere,outperforming most COF-based photocatalytic systems under similar reaction conditions.Further characterizations and density functional theory calculations reveal these various linkages in different COFs result in distinct visible-light absorption,charge transfer capacities and formation energy barriers of key intermediates.This work revealed the significant impact of linkages on COFs and provided comprehensive guidance for the rational design of COFs with tailored linkages to fulfill specific requirements for future applications.
基金supported by the National Ten Thousand Talents Plan and the high-performance computing platform of Guizhou Universitythe Program of Introducing Talents to Chinese Universities(no.D20023)+1 种基金the Central Government Guides Local Science and Technology Development Fund Projects(Qiankehezhongyindi(2023)001)the Frontiers Science Centre for Asymmetric Synthesis and Medicinal Molecules,and the Department of Education,Guizhou Province[Qianjiaohe KY(2020)004].
文摘Photocatalytic technology has attracted much attention in the fields of clean energy and environmental governance.However,how to design and develop highly efficient photocatalytic materials remains an urgent scientific problem to be solved.This study focuses on enhancing photocatalytic activity through microstructure modification.Among them,ToRed-4 showed the most prominent performance.Under the illumination condition of 420 nm,its value was 13506 lmol g^(-1) h^(-1),which was approximately 18 times that of CN550(bulk g-C_(3)N_(4))(719 lmol g^(-1) h^(-1)).By using DFT calculations,the photocatalytic performance was deeply analyzed,revealing the significant advantages of the ToRed series in key performance indicators and the underlying synergy mechanisms,including the reduction of the HOMO-LUMO energy gap,the efficient separation of electron holes,the expansion of the electronic transition range,the transformation of the electrostatic potential distribution,the increase in dipole moment,and the optimization of the Coulomb attractive energy.The research results of this study provide a key basis for opening up new avenues for the design and development of highly efficient photocatalytic materials and are expected to play an important role in related fields.
基金Project supported by the the National Key R&D Program of China(Grant Nos.2019YFA0709300 and 2021YFB3202800)the National Natural Science Foundation of China(Grant Nos.T2125011 and 12174377)+4 种基金the Chinese Academy of Sciences(Grant No.YSBR-068)Innovation Program for Quantum Science and Technology(GrantNos.2021ZD0302200 and 2021ZD0303204)New Cornerstone Science Foundation through the XPLORER PRIZEScience and Technology Department of Zhejiang Province(Grant No.2025C01041)the Fundamental Research Funds for the Central Universities(Grant No.226-2024-00142)。
文摘Combining optical tweezers with fluorescence microscopy is a powerful tool for single-cell analysis,playing a pivotal role in disease diagnosis,cell sorting,and the investigation of cellular dynamics.However,fluorescence detection faces challenges such as blinking,photobleaching and autofluorescence in biotissues.To address these limitations,we developed a magnetic detection strategy by integrating quantum magnetometry using nitrogen-vacancy centers into optical tweezers,demonstrating precise trapping and manipulation of individual cells in microfluidic environment.We detected a magnetic signal of 89μT from a single cell labeled with magnetic nanoparticles,compared to a noise floor of 3.9μT observed in unlabeled cells.This platform provides a promising approach for high-precision single-cell analysis and holds significant potential for probing cellular activities within biological microenvironments.
基金supported by the National Science Basic Research Program of Shaanxi(Grant No.2023-JC-QN-0087)。
文摘The ion channel in neurons is the basic component of signal transmission in the nervous system.The ion channel has important effects on the potential of neuron release and dynamic behavior in neural networks.Ion channels control the flow of ions into and out of the cell membrane to form an ion current,which makes the excitable membrane produce special potential changes and become the basis of nerve and muscle activity.The blockage of ion channels has a significant effect on the dynamics of neurons and networks.Therefore,it is very meaningful to study the influence of ion channels on neuronal dynamics.In this work,a hybrid ion channel is designed by connecting a charge-controlled memristor(CCM)with an inductor in series,and a magnetic flux-controlled memristor(MFCM),capacitor,and nonlinear resistor are connected in parallel with the mixed ion channel to obtain the memristor neural circuit.Furthermore,the oscillator model with a hybrid ion channel and its energy function are calculated,and a map neuron is obtained by linearizing the neuron oscillator model.In addition,an adaptive regulation method is designed to explore the adaptive regulation of energy on the dynamic behaviors of the map neuron.The results show that the dynamics of a map neuron with a hybrid ion channel can be controlled by parameters and external magnetic fields.This study is also used to research synchronization between map neurons and collective behaviors in the map neurons network.
基金supported by the Youth Innovation Team of Shaanxi Universities。
文摘The analysis of structure and dynamics in chaotic systems has long been a significant research direction in nonlinear science.Constructing a reliable chaotic system with rich dynamical characteristics is essential for secure communication applications.Existing memristor-based chaotic maps are typically obtained by incorporating discrete mathematical models of memristors into basic chaotic maps.In this study,a simple memristive nonlinear circuit is first designed,from which a memristive oscillator is derived.Subsequently,a memristive map is developed from this oscillator through a linear transformation of the variables.The reliability of the new map is validated through nonlinear dynamic analysis.The results demonstrate that the map exhibits complex nonlinear dynamics under different parameter settings.This finding is beneficial for the construction of memristor maps and the development of image encryption algorithms.
文摘<strong>Objective:</strong> The purpose of this study was to explore the clinical efficacy and security of the treatment of popliteal cyst through radiofrequency thermocoagulation (RFT) under ultrasound guidance. <strong>Methods:</strong> The clinical data of 35 patients with popliteal cyst, who were treated by RFT under ultrasound guidance from June 2019 to June 2020, were retrospectively analyzed. The Visual Analogue Scores (VAS) and the size of cyst before and after treatment were recorded at the first month, the third month, the sixth month. After six months, the recovery rate of Rauschning and Lindgren classification (R-L classification) level 0, 0 - I were counted. All the complications of the patients were observed. <strong>Results:</strong> 32 patients were followed up for six months. The scores and cyst sizes of each patient before and after the treatment were on a normal distribution curve. There was no significant difference in VAS scores before and after the treatment (P > 0.05). However, there was a significant difference in cyst sizes before and after the treatment (P < 0.05). Moreover, there was no significant difference in VAS scores and cyst sizes in each period after treatment (P > 0.05). According to the R-L classification in 6 months after treatment: the recovery rate of class 0 was 62.5% and class 0 - I level was 87.5%. There were no serious complications in the process. <strong>Conclusion:</strong> Treatment of popliteal cyst through RFT under ultrasound guidance is a simple, easy, reliable method that is worthy of clinical promotion.
