The crocodile lizard （Shinisaurus croeodilurus） is an ovoviviparoug lizard belonging to a monotypic family that originated during the end of the quaternary ice age. A rare species in the wild, the crocodile lizard w...The crocodile lizard （Shinisaurus croeodilurus） is an ovoviviparoug lizard belonging to a monotypic family that originated during the end of the quaternary ice age. A rare species in the wild, the crocodile lizard was listed in CITES Appendix II. Knowledge of the reproductive biology and mating system of this species is important for designing conservation strategies and improving genetic variation. To investigate the paternity of the crocodile lizards and to interpret their reproductive behaviour, we collected saliva from females, potential fathers and offspring in a semi- natural enclosure experiment and analyzed the paternity of the crocodile lizard using 12 microsatellite genetic loci. The overall observed incidence of multiple paternity was 42.9% （6 of 14 clutches） and Fis was 0.089 ± 0.056. These results indicate that the primary mating mode of the crocodile lizard is that males are polygynous while with females are polyandrous, and there is multiple paternity among offspring of the same mother.展开更多
This study investigates the coordination between regional economic growth and ecological sustainability within the context of high-quality town economy development.To address the challenges of balancing economic expan...This study investigates the coordination between regional economic growth and ecological sustainability within the context of high-quality town economy development.To address the challenges of balancing economic expansion with environmental protection,a comprehensive evaluation index system is constructed,encompassing two key dimensions:regional economy and ecological environment.Using panel data from 2013 to 2022,the coupling coordination degree model is employed to quantify the interactions and synergy between these dimensions.Additionally,spatial econometric methods are applied to calculate both global and local Moran’s Index,revealing spatial clustering patterns,regional disparities,and heterogeneity.The relative development model further identifies critical factors influencing regional coordination,with a focus on the lagging development of basic infrastructure and public services.The findings demonstrate a positive temporal trend toward improved regional coordination and reduced development gaps,with a spatial pattern characterized by higher coupling degrees in eastern and central regions compared to western areas.Based on these results,this study proposes actionable strategies to enhance coordinated development,emphasizing ecological conservation,the establishment of green production and consumption systems,ecological restoration,and strengthened municipal collaboration.This revised abstract emphasizes the study’s purpose,methods,and key findings more clearly while maintaining a professional and concise tone.Finally,based on the above analysis results,the corresponding coordinated development suggestions of regional economy and ecological environment are given from the aspects of ecological environment protection measures,green production and consumption system construction,ecological environment restoration and municipal coordination.展开更多
Aqueous zinc-ion batteries(AZIBs)are gaining attention owing to their affordability,high safety,and high energy density,making them a promising solution for large-scale energy storage.However,their performance is hamp...Aqueous zinc-ion batteries(AZIBs)are gaining attention owing to their affordability,high safety,and high energy density,making them a promising solution for large-scale energy storage.However,their performance is hampered by the instability of both the anode-electrolyte interface and the cathode-electrolyte interface.The use of sodium gluconate(SG),an organic sodium salt with multiple hydroxyl groups,as an electrolyte additive is suggested.Experimental and theoretical analyses demonstrate that Na^(+)from SG can intercalate and deintercalate within the associated V_(2)O_(5) cathode during in situ electrochemical processes.This action supports the layered structure of V_(2)O_(5),prevents structural collapse and phase transitions,and enhances Zn^(2+)diffusion kinetics.Additionally,the gluconate anion disrupts the original Zn^(2+)solvation structure,mitigates water-induced side reactions,and suppresses Zn dendrite growth.The synchronous regulation of both the V_(2)O_(5) cathode and Zn anode by the SG additive leads to considerable performance improvements.Zn‖Zn symmetric batteries demonstrate a cycle life exceeding 2800 h at 0.5 mA cm^(-2)and 1 mAh cm^(-2).In Zn‖V_(2)O_(5) full batteries,a high specific capacity of 288.92 mAh g^(-1)and capacity retention of 82.29%are maintained over 1000 cycles at a current density of 2 A g^(-1).This multifunctional additive strategy offers a new pathway for the practical application of AZIBs.展开更多
Built-in electric field coupled piezoelectric polarization engineering is a promising method to adjust and boost the catalytic performance of photocatalysts.Herein,BiOIO_(3)-Bi_(2)Te_(3) type-II heterojunction piezo-p...Built-in electric field coupled piezoelectric polarization engineering is a promising method to adjust and boost the catalytic performance of photocatalysts.Herein,BiOIO_(3)-Bi_(2)Te_(3) type-II heterojunction piezo-photocatalyst was proposed and prepared by a sequential hydro-solvothermal method.Due to the co-drive of the heterojunction and photothermal-piezoelectric polarization effect certified by piezoelectric force microscopy,COMSOL simulations,and infrared thermography,the photocatalytic degradation performance of the as-prepared BiOIO_(3)-Bi_(2)Te_(3) on rhodamine B was dramatically improved under the co-excitation of visible light and ultrasound compared with under the single light irradiation and the single ultrasonic conditions.Typically,the BiOIO_(3)-Bi_(2)Te_(3) photocatalyst always showed significantly better catalytic degradation performance than the pure Bi_(2)Te_(3),BiOIO_(3),and BiOIO_(3)/Bi_(2)Te_(3) mechanical mixtures.Impressively,based on the optimal conditions obtained by systematically studying the effects of temperatures,ultrasound intensities,and inorganic salts on the piezo-photocatalytic rhodamine B degradation,the optimum composite ratio BiOIO_(3)-Bi_(2)Te_(3)-20 piezo-photocatalyst can also effectively remove tetracycline and Cr(VI),and also achieve the purpose of simultaneously removing a mixture of these three pollutants with good recycling stability.Such enhanced catalytic performance was mainly attributed to the disruptions of the electrostatic equilibrium and saturation effects of the built-in electric field under successive ultrasonic and photoinduced co-disturbance,thus enhancing the driving force of separation and migration of photogenerated carriers as verified by electrochemical tests,energy band structure theory,and DFT calculations.Based on which and the sacrificial agent experiments,the photocatalytic degradation mechanism was proposed.This research showcased the significant potential for environmental remediation using solar energy and mechanical energy cooperatively.展开更多
Developing electrocatalysts to inhibit polysulfide shuttling and expedite sulfur species conversion is vital for the evolution of Lithium-sulfur(Li-S)batteries.This work provides a facile strategy to design an intimat...Developing electrocatalysts to inhibit polysulfide shuttling and expedite sulfur species conversion is vital for the evolution of Lithium-sulfur(Li-S)batteries.This work provides a facile strategy to design an intimate heterostructure of MIL-88A@CdS as a sulfur electrocatalyst combining high sulfur adsorption and accelerated polysulfide conversion.The MIL-88A can give a region of high-ordered polysulfide adsorption,whereas the CdS is an effective nanoreactor for the sulfur reduction reaction(SRR).Notedly,the significant size difference between MIL-88A and CdS enables the unique heterostructure interactions.The largesize MIL-88A ensures a uniform distribution of CdS nanoparticles as a substrate.This configuration facilitates control of the initial polysulfide adsorption position relative to its final deposition site as lithium sulfide.The heterostructure also demonstrates rapid transport and efficient conversion of lithium polysulfides.Consequently,the Li-S battery with MIL-88A@CdS heterostructure modified separator delivers exceptional performance,achieving an areal capacity exceeding 6 mAh cm^(−2),an excellent rate capability of 980 mAh g^(−1) at 5 C,and notable cycling stability in a 2 Ah pouch cell over 100 cycles.This work is significant for elucidating the relationship between heterostructure and electrocatalytic performance,providing great insights for material design aimed at highly efficient future electrocatalysts in practical applications.展开更多
Most of the existing studies on tunnel blast wave are based on spherical or grouped charges, however,conventional weapons are mostly cylindrical rather than spherical. In order to analyze the impact of cylindrical cha...Most of the existing studies on tunnel blast wave are based on spherical or grouped charges, however,conventional weapons are mostly cylindrical rather than spherical. In order to analyze the impact of cylindrical charges on the tunnel blast wave loads and to develop a quantitative calculation method, this study carried out experimental and numerical research. Initially, external explosion experiments were conducted using both 35 kg spherical charges and cylindrical charges with aspect ratio of 4.8 at two different distances from the tunnel entrance. Comparative analysis of the blast wave parameters in the tunnel revealed that the explosive equivalent of the cylindrical charges was significantly higher than that of the spherical charges. To address this, an equivalent coefficient κ based on the spherical charges was proposed for the cylindrical charges. Subsequently, numerical simulations were conducted for the experimental conditions, and the numerical simulation results match the experiments well. Through numerical calculations, the reliability of the equivalent coefficient κ under the experimental conditions was verified, and comparison analysis indicated that the explosion energy of cylindrical charges spreads more radially, resulting in more explosion energy entering the tunnel, which is the fundamental reason for the increase in tunnel blast wave loads. Additionally, analyzing the explosion energy ratio entering the tunnel is an effective method for calculating the equivalent coefficient κ. Finally, through more than one hundred sets of numerical calculation results, the impact of the proportional distance λ and the ratio of charge mass to the tunnel cross-section dimension φ on the equivalence coefficients κ was investigated. An empirical formula for the equivalence coefficient κ was derived through fitting, and the accuracy of the formula was validated through literature experimental results. The research findings of this paper will provide valuable guidance for the calculation of blast wave loads in tunnel.展开更多
Obtaining accurate ship positions and headings in remote sensing images plays a crucial role in various applications.However,current deep learning-based methods primarily focus on ship position detection,while the det...Obtaining accurate ship positions and headings in remote sensing images plays a crucial role in various applications.However,current deep learning-based methods primarily focus on ship position detection,while the detection of ship wakes relies on traditional non-deep learning approaches,which often underperform in complex marine environments.We proposed a novel,simple,and efficient method called Point-Vector Net.The proposed method leverages convolutional neural networks(CNN)for feature extraction and subsequently integrates multi-scale features to generate high-resolution feature maps.In the final stage,ship positions and headings are represented using a combination of points and vectors.Comparative experiments with results from automatic identification system(AIS)reports demonstrate that our method achieved impressive performance in two-class ship target detection,with an average precision of 96.4%,recall rate of 94.3%,and an F 1 score of 95.2%.Notably,the average heading error was 3.3°.The proposed model achieved a practical inference speed(FPS>30),and the average processing time for inferring a large-scale Sentinel-2 remote sensing image was 11.4 s.展开更多
In this work,atomic Co catalysts are anchored on a three-dimensional(3D)interconnected g-C_(3)N_(4)(SACo-CN)through Co-N coordination,which exhibit efficient charge carrier transition and low activation energy barrier...In this work,atomic Co catalysts are anchored on a three-dimensional(3D)interconnected g-C_(3)N_(4)(SACo-CN)through Co-N coordination,which exhibit efficient charge carrier transition and low activation energy barriers for peroxymonosulfate(PMS).The incorporation of Co atoms extends the absorption spectrum and enhances the photoelectron-hole separation efficiency of the SACo-CN samples.The 3D interconnected structure,combined with the synergistic interplay between Co-N coordination and visible light irradiation,results in SACo-CN catalysts demonstrating excellent catalytic activity and stability for PMS activation.This leads to a degradation rate of 98.8%for oxytetracycline(OTC)within 30 min under visible light.The research proposes three potential mineralization pathways with eight intermediates,leading to a significant decrease in the toxicity of the intermediates.This work provides a facile and promising approach for the preparation of metal single atom catalysts with highly efficient PMS activation performance.展开更多
Under the dual drivers of global climate governance and carbon neutrality goals,agricultural carbon emission reduction has become a pivotal component of regional green transformation.This study focuses on Guangdong,a ...Under the dual drivers of global climate governance and carbon neutrality goals,agricultural carbon emission reduction has become a pivotal component of regional green transformation.This study focuses on Guangdong,a major province,employing the LMDI decomposition mode to systematically analyze the driving mechanis of agricultural carbon emissions.It reveals that the low ecological compensation standard,industrial path dependence,and high-carbon energy lock-in consti-tute core constraints.The research finds that the absence of ecological compensation standards and the structural imbalance of traditional subsidy policies induce diminishing marginal benefits in carbon reduction due to structural imbalances,while persistent funding shortages in low-carbon technology R&D further weaken emission reduction efficacy,exacerbating compatibility contradictions between emission policies and production practices.Through the comparison of domestic and foreign experiences,it is found that under the global wave of low-carbon transformation in agriculture,the ecological compensation optimization layer should establish a calculation system for the carbon sink value of cultivated land and differentiated compensation standards;the fiscal and taxation policy coordination layer should implement a tiered carbon tax on agricultural inputs and carbon sink pledge financing incentives.Constructing a fiscal expenditure and fiscal and taxation coordination mechanism that suits regional characteristics is the key path to resolving the contradiction between the technical economy and ecological sustainability of emission reduction.展开更多
With the rapid development of the Chinese market economy system,income tax as an economic lever has become more and more prominent in regulating the economy.Since the beginning of the accounting reform,the Ministry of...With the rapid development of the Chinese market economy system,income tax as an economic lever has become more and more prominent in regulating the economy.Since the beginning of the accounting reform,the Ministry of Finance has promulgated the accounting standards for income tax and put forward the corresponding procedures and methods,which is a leap forward in the development process of domestic income tax accounting.The relationship between income tax and accounting,the nature of income tax,and the basic characteristics and the apportionment of income tax accounting are expounded in this paper.Payable tax with impact accounting regulations,deferred with debt regulations,and balance sheet debt with income statement debt regulations are compared given the existing problems in the accounting treatment of domestic income tax,and the choice of applicable treatment methods are discussed.Finally,the accounting treatment of important income tax such as consolidated accounting statements,construction enterprises,tax losses,and discount of income tax liabilities are analyzed,and the treatment methods and corresponding countermeasures are put forward to improve the domestic income tax accounting problems.展开更多
AIM:To investigate the underlying factors by establishing a new paradigm for assessing control ability under stereopsis testing conditions.METHODS:This was a prospective observational study.We evaluated the control ab...AIM:To investigate the underlying factors by establishing a new paradigm for assessing control ability under stereopsis testing conditions.METHODS:This was a prospective observational study.We evaluated the control ability of intermittent exotropia(IXT)patients in three conditions:natural 2D optotype viewing,2D optotype viewing with polarized glasses,and 3D optotype viewing with polarized glasses.Recording with a smartphone,we captured videos to analyze the accurate time of spontaneous exodeviation and subsequent realignment before and after breaking fusion.Additionally,the correlation of stereopsis were also analyzed.RESULTS:A total of 48 patients(age range:4-33y;54.17%male)participated in the study.When viewing 3D optotypes with polarized glasses,their median control scores were 1(interquartile range,0-4)at distance and 0(0-1)at near.These scores were significantly better than those observed under natural viewing conditions,which were 2.5(1-5)at a distance and 1(0-3)at near(Friedman test,P=0.049).Furthermore,those subjects who exhibited exophoria(realignment within 2 seconds)while viewing 3D optotypes with polarized glasses were more likely to have measurable stereo vision(Kendall’sτb=-0.344,P=0.018).CONCLUSION:IXT patients exhibit enhanced control ability when using polarized glasses to view 3D optotypes,notably improving realignment capabilities.This expands our understanding of current tests and offers a potentially sensitive method for assessing IXT severity.展开更多
In this paper, an improved Fast-R-CNN nuclear power cold source disaster biological image recognition algorithm is proposed to improve the safety operation of nuclear power plants. Firstly, the image data sets of the ...In this paper, an improved Fast-R-CNN nuclear power cold source disaster biological image recognition algorithm is proposed to improve the safety operation of nuclear power plants. Firstly, the image data sets of the disaster-causing creatures hairy shrimp and jellyfish were established. Then, in order to solve the problems of low recognition accuracy and unrecognizable small entities in disaster biometrics, Gamma correction algorithm was used to optimize the image of the data set, improve the image quality and reduce the noise interference. Transposed convolution is introduced into the convolution layer to increase the recognition accuracy of small targets. The experimental results show that the recognition rate of this algorithm is 6.75%, 7.5%, 9.8% and 9.03% higher than that of ResNet-50, MobileNetv1, GoogleNet and VGG16, respectively. The actual test results show that the accuracy of this algorithm is obviously better than other algorithms, and the recognition efficiency is higher, which basically meets the preset requirements of this paper.展开更多
AIM To investigate the effects of taxol onSMMC-7721 human hepatoma and itsmechanisms.METHODS In vitro cell growth was assessedby trypan blue exclusion method.Experimentalhepatoma model was established by seedingSMMC-7...AIM To investigate the effects of taxol onSMMC-7721 human hepatoma and itsmechanisms.METHODS In vitro cell growth was assessedby trypan blue exclusion method.Experimentalhepatoma model was established by seedingSMMC-7721 cells subcutaneously into Balb/c(nu/nu)nude mice.In vivo tumor growth wasdetermined by measurement of tumor diameterwith Vernier calipers.The syntheses of DNA,RNA and protein were analyzed by incorporationof ~3H-thymidine,~3H-uridine and ~3H-leucinerespectively.Using light and electronmicroscopes to observe the morphologicalchanges of cells including mitosis andapoptosis.RESULTS Taxol was effective against SMMC-7721 human hepatoma cell growth in the rangesof 2.5 nmol/L-10 nmol/L with mitotic arrestand apoptosis in vitro.DNA,RNA and proteinsyntheses in cells were also obviouslysuppressed by in vitro treatment of taxol for72 h.Taxol at 2.5 nmol/L reduced ~3H-thymidineuptake to about 34% of the control value(P【0.05).Increasing the dose of taxol to20 nmol/L resulted in a greater decrease in ~3H-thymidine incorporation to 60% of the controlvalue(P【0.01).At a concentration of 20 nmol/L,the ~3H-uridine and ~3H-leucine uptakeswere reduced to 52%(P【0.05)and 63%(P【0.01),respectively.In vivo,taxolsignificantly inhibited SMMC-7721 tumor growthat 10 mg/kg,i.p.,once daily for 10 d.A morethan 90% decrease in tumor volume wasobserved by day 11(P【0.01)similarly withmitotic arrest and cell apoptosis.CONCLUSION Taxol has a marked anticanceractivity in SMMC-7721 human hepatoma both invitro and in nude mice.Its mechanisms might beassociated with mitotic arrest,subsequently,apoptosis of the hepatoma cells.No obvioustoxicity was observed with in vivoadministration of taxoi.展开更多
Acupuncture has reportedly improved memory and cognitive impairment in both animal and clinical studies. It may be an effective treatment for Alzheimer's disease (AD). The purpose of this meta-analysis was to revi...Acupuncture has reportedly improved memory and cognitive impairment in both animal and clinical studies. It may be an effective treatment for Alzheimer's disease (AD). The purpose of this meta-analysis was to review the effectiveness of acupuncture for the treatment of AD. Eight databases were searched for articles published up to and including July 2017, and 13 studies fulfilling the inclusion criteria were identified. The main outcomes assessed were clinical efficacy rate, Mini-Mental State Examination score, Ability of Daily Living Scale score, Alzheimer's Disease Assessment Scale-Cognition score, Hasegawa's Dementia Scale (HDS) score, and adverse events. The methodological quality of the articles was assessed using Cochrane's risk of bias. All the studies compared the efficacy of acupuncture with that of medication, and were published in Chinese journals. Meta-analysis revealed that acupuncture yielded positive results as determined via all the indexes scored except the HDS (95% CI -0.26 to 0.90, Z=0.35, P=0.73). Only one of the studies reported adverse events associated with acupuncture and medication. The rate of adverse events in the medication group was 13%. In most of the studies assessed in the current metaanalysis, acupuncture alone was better than conventional western medicines for the treatment of AD.展开更多
Natural bone is a mineralized biological material, which serves a supportive and protective framework for the body, stores minerals for metabolism, and produces blood cells nourishing the body. Normally, bone has an i...Natural bone is a mineralized biological material, which serves a supportive and protective framework for the body, stores minerals for metabolism, and produces blood cells nourishing the body. Normally, bone has an innate capacity to heal from damage.However, massive bone defects due to traumatic injury, tumor resection, or congenital diseases pose a great challenge to reconstructive surgery. Scaffold-based tissue engineering(TE) is a promising strategy for bone regenerative medicine, because biomaterial scaffolds show advanced mechanical properties and a good degradation profile, as well as the feasibility of controlled release of growth and differentiation factors or immobilizing them on the material surface. Additionally, the defined structure of biomaterial scaffolds, as a kind of mechanical cue, can influence cell behaviors, modulate local microenvironment and control key features at the molecular and cellular levels. Recently, nano/micro-assisted regenerative medicine becomes a promising application of TE for the reconstruction of bone defects. For this reason, it is necessary for us to have in-depth knowledge of the development of novel nano/micro-based biomaterial scaffolds. Thus, we herein review the hierarchical structure of bone, and the potential application of nano/micro technologies to guide the design of novel biomaterial structures for bone repair and regeneration.展开更多
基金supported by the National Natural Science Foundation of China(No.31360522)
文摘The crocodile lizard （Shinisaurus croeodilurus） is an ovoviviparoug lizard belonging to a monotypic family that originated during the end of the quaternary ice age. A rare species in the wild, the crocodile lizard was listed in CITES Appendix II. Knowledge of the reproductive biology and mating system of this species is important for designing conservation strategies and improving genetic variation. To investigate the paternity of the crocodile lizards and to interpret their reproductive behaviour, we collected saliva from females, potential fathers and offspring in a semi- natural enclosure experiment and analyzed the paternity of the crocodile lizard using 12 microsatellite genetic loci. The overall observed incidence of multiple paternity was 42.9% （6 of 14 clutches） and Fis was 0.089 ± 0.056. These results indicate that the primary mating mode of the crocodile lizard is that males are polygynous while with females are polyandrous, and there is multiple paternity among offspring of the same mother.
基金support from Guangdong Science and Technology(20230505)Guangdong Provincial Philosophy and Social Science Planning Project(GD20SQ25)Guangdong Provincial Special Fund for Science and Technology Innovation Strategy in 2024(Cultivation of College Students’Science and Technology Innovation)(pdjh2024a391)during preparation of this manuscript.
文摘This study investigates the coordination between regional economic growth and ecological sustainability within the context of high-quality town economy development.To address the challenges of balancing economic expansion with environmental protection,a comprehensive evaluation index system is constructed,encompassing two key dimensions:regional economy and ecological environment.Using panel data from 2013 to 2022,the coupling coordination degree model is employed to quantify the interactions and synergy between these dimensions.Additionally,spatial econometric methods are applied to calculate both global and local Moran’s Index,revealing spatial clustering patterns,regional disparities,and heterogeneity.The relative development model further identifies critical factors influencing regional coordination,with a focus on the lagging development of basic infrastructure and public services.The findings demonstrate a positive temporal trend toward improved regional coordination and reduced development gaps,with a spatial pattern characterized by higher coupling degrees in eastern and central regions compared to western areas.Based on these results,this study proposes actionable strategies to enhance coordinated development,emphasizing ecological conservation,the establishment of green production and consumption systems,ecological restoration,and strengthened municipal collaboration.This revised abstract emphasizes the study’s purpose,methods,and key findings more clearly while maintaining a professional and concise tone.Finally,based on the above analysis results,the corresponding coordinated development suggestions of regional economy and ecological environment are given from the aspects of ecological environment protection measures,green production and consumption system construction,ecological environment restoration and municipal coordination.
基金supported by the Battery Energy Storage Testing Center of Chongqing through their provision of testing support and technical assistance。
文摘Aqueous zinc-ion batteries(AZIBs)are gaining attention owing to their affordability,high safety,and high energy density,making them a promising solution for large-scale energy storage.However,their performance is hampered by the instability of both the anode-electrolyte interface and the cathode-electrolyte interface.The use of sodium gluconate(SG),an organic sodium salt with multiple hydroxyl groups,as an electrolyte additive is suggested.Experimental and theoretical analyses demonstrate that Na^(+)from SG can intercalate and deintercalate within the associated V_(2)O_(5) cathode during in situ electrochemical processes.This action supports the layered structure of V_(2)O_(5),prevents structural collapse and phase transitions,and enhances Zn^(2+)diffusion kinetics.Additionally,the gluconate anion disrupts the original Zn^(2+)solvation structure,mitigates water-induced side reactions,and suppresses Zn dendrite growth.The synchronous regulation of both the V_(2)O_(5) cathode and Zn anode by the SG additive leads to considerable performance improvements.Zn‖Zn symmetric batteries demonstrate a cycle life exceeding 2800 h at 0.5 mA cm^(-2)and 1 mAh cm^(-2).In Zn‖V_(2)O_(5) full batteries,a high specific capacity of 288.92 mAh g^(-1)and capacity retention of 82.29%are maintained over 1000 cycles at a current density of 2 A g^(-1).This multifunctional additive strategy offers a new pathway for the practical application of AZIBs.
基金funded by the Natural Science Foundation of Jilin Province of China(No.20240101075JC)Henan Province Science and Technology programs(No.242102230096)+3 种基金the National Natural Science Foundation of China(52372174)the Science and Technology Research key Project of the Education Department of Henan Province(No.24A430049)the Carbon Neutrality Research Institute Fund(CNIF20230204)the Special Project of Strategic Cooperation between China National Petroleum Corporation and China University of Petroleum(Beijing)(ZLZX-2020-04).
文摘Built-in electric field coupled piezoelectric polarization engineering is a promising method to adjust and boost the catalytic performance of photocatalysts.Herein,BiOIO_(3)-Bi_(2)Te_(3) type-II heterojunction piezo-photocatalyst was proposed and prepared by a sequential hydro-solvothermal method.Due to the co-drive of the heterojunction and photothermal-piezoelectric polarization effect certified by piezoelectric force microscopy,COMSOL simulations,and infrared thermography,the photocatalytic degradation performance of the as-prepared BiOIO_(3)-Bi_(2)Te_(3) on rhodamine B was dramatically improved under the co-excitation of visible light and ultrasound compared with under the single light irradiation and the single ultrasonic conditions.Typically,the BiOIO_(3)-Bi_(2)Te_(3) photocatalyst always showed significantly better catalytic degradation performance than the pure Bi_(2)Te_(3),BiOIO_(3),and BiOIO_(3)/Bi_(2)Te_(3) mechanical mixtures.Impressively,based on the optimal conditions obtained by systematically studying the effects of temperatures,ultrasound intensities,and inorganic salts on the piezo-photocatalytic rhodamine B degradation,the optimum composite ratio BiOIO_(3)-Bi_(2)Te_(3)-20 piezo-photocatalyst can also effectively remove tetracycline and Cr(VI),and also achieve the purpose of simultaneously removing a mixture of these three pollutants with good recycling stability.Such enhanced catalytic performance was mainly attributed to the disruptions of the electrostatic equilibrium and saturation effects of the built-in electric field under successive ultrasonic and photoinduced co-disturbance,thus enhancing the driving force of separation and migration of photogenerated carriers as verified by electrochemical tests,energy band structure theory,and DFT calculations.Based on which and the sacrificial agent experiments,the photocatalytic degradation mechanism was proposed.This research showcased the significant potential for environmental remediation using solar energy and mechanical energy cooperatively.
基金supported by the Natural Science Foundation of China(22309179)the Natural Science Foundation of China(12404049)+4 种基金Natural Science Foundation of Ningxia(2023AAC01003)Guangdong Basic and Applied Basic Research Foundation(2021A1515110156,2022A1515010724,2023A1515110521,2023B1515120095,2024A1515011260)Science and Technology Program of Guangzhou(No.2019050001)the Outstanding Youth Project of Guangdong Natural Science Foundation(2021B1515020051)Dalian Revitalization Talents Program(No.2022RG01).
文摘Developing electrocatalysts to inhibit polysulfide shuttling and expedite sulfur species conversion is vital for the evolution of Lithium-sulfur(Li-S)batteries.This work provides a facile strategy to design an intimate heterostructure of MIL-88A@CdS as a sulfur electrocatalyst combining high sulfur adsorption and accelerated polysulfide conversion.The MIL-88A can give a region of high-ordered polysulfide adsorption,whereas the CdS is an effective nanoreactor for the sulfur reduction reaction(SRR).Notedly,the significant size difference between MIL-88A and CdS enables the unique heterostructure interactions.The largesize MIL-88A ensures a uniform distribution of CdS nanoparticles as a substrate.This configuration facilitates control of the initial polysulfide adsorption position relative to its final deposition site as lithium sulfide.The heterostructure also demonstrates rapid transport and efficient conversion of lithium polysulfides.Consequently,the Li-S battery with MIL-88A@CdS heterostructure modified separator delivers exceptional performance,achieving an areal capacity exceeding 6 mAh cm^(−2),an excellent rate capability of 980 mAh g^(−1) at 5 C,and notable cycling stability in a 2 Ah pouch cell over 100 cycles.This work is significant for elucidating the relationship between heterostructure and electrocatalytic performance,providing great insights for material design aimed at highly efficient future electrocatalysts in practical applications.
文摘Most of the existing studies on tunnel blast wave are based on spherical or grouped charges, however,conventional weapons are mostly cylindrical rather than spherical. In order to analyze the impact of cylindrical charges on the tunnel blast wave loads and to develop a quantitative calculation method, this study carried out experimental and numerical research. Initially, external explosion experiments were conducted using both 35 kg spherical charges and cylindrical charges with aspect ratio of 4.8 at two different distances from the tunnel entrance. Comparative analysis of the blast wave parameters in the tunnel revealed that the explosive equivalent of the cylindrical charges was significantly higher than that of the spherical charges. To address this, an equivalent coefficient κ based on the spherical charges was proposed for the cylindrical charges. Subsequently, numerical simulations were conducted for the experimental conditions, and the numerical simulation results match the experiments well. Through numerical calculations, the reliability of the equivalent coefficient κ under the experimental conditions was verified, and comparison analysis indicated that the explosion energy of cylindrical charges spreads more radially, resulting in more explosion energy entering the tunnel, which is the fundamental reason for the increase in tunnel blast wave loads. Additionally, analyzing the explosion energy ratio entering the tunnel is an effective method for calculating the equivalent coefficient κ. Finally, through more than one hundred sets of numerical calculation results, the impact of the proportional distance λ and the ratio of charge mass to the tunnel cross-section dimension φ on the equivalence coefficients κ was investigated. An empirical formula for the equivalence coefficient κ was derived through fitting, and the accuracy of the formula was validated through literature experimental results. The research findings of this paper will provide valuable guidance for the calculation of blast wave loads in tunnel.
基金Supported by the National Key R&D Program of China(No.2022YFB3902400)the China High Resolution Earth Observation System Program(No.41-Y30F07-9001-20/22)。
文摘Obtaining accurate ship positions and headings in remote sensing images plays a crucial role in various applications.However,current deep learning-based methods primarily focus on ship position detection,while the detection of ship wakes relies on traditional non-deep learning approaches,which often underperform in complex marine environments.We proposed a novel,simple,and efficient method called Point-Vector Net.The proposed method leverages convolutional neural networks(CNN)for feature extraction and subsequently integrates multi-scale features to generate high-resolution feature maps.In the final stage,ship positions and headings are represented using a combination of points and vectors.Comparative experiments with results from automatic identification system(AIS)reports demonstrate that our method achieved impressive performance in two-class ship target detection,with an average precision of 96.4%,recall rate of 94.3%,and an F 1 score of 95.2%.Notably,the average heading error was 3.3°.The proposed model achieved a practical inference speed(FPS>30),and the average processing time for inferring a large-scale Sentinel-2 remote sensing image was 11.4 s.
基金financial support from the National Natural Science Foundation of China(Nos.22276159,J2224005)the Key research project plan for higher education institutions of Henan province(No.24ZX009)+1 种基金the Development Program for Key Young Teachers in Colleges and Universities of Henan Province(No.2020GGJS146)the Starting Research Fund of Xinxiang Medical University(No.XYBSKYZZ201911)。
文摘In this work,atomic Co catalysts are anchored on a three-dimensional(3D)interconnected g-C_(3)N_(4)(SACo-CN)through Co-N coordination,which exhibit efficient charge carrier transition and low activation energy barriers for peroxymonosulfate(PMS).The incorporation of Co atoms extends the absorption spectrum and enhances the photoelectron-hole separation efficiency of the SACo-CN samples.The 3D interconnected structure,combined with the synergistic interplay between Co-N coordination and visible light irradiation,results in SACo-CN catalysts demonstrating excellent catalytic activity and stability for PMS activation.This leads to a degradation rate of 98.8%for oxytetracycline(OTC)within 30 min under visible light.The research proposes three potential mineralization pathways with eight intermediates,leading to a significant decrease in the toxicity of the intermediates.This work provides a facile and promising approach for the preparation of metal single atom catalysts with highly efficient PMS activation performance.
基金Financial support from Guangdong Science and Technology(20230505)Guangdong Provincial Philosophy and Social Science Planning Project(GD20SQ25)Guangdong Provincial Special Fund for Science and Technology Innovation Strategy in 2024(Cultivation of College Students’Science and Technology Innovation)(pdjh2024a391)during preparation of this manuscript.
文摘Under the dual drivers of global climate governance and carbon neutrality goals,agricultural carbon emission reduction has become a pivotal component of regional green transformation.This study focuses on Guangdong,a major province,employing the LMDI decomposition mode to systematically analyze the driving mechanis of agricultural carbon emissions.It reveals that the low ecological compensation standard,industrial path dependence,and high-carbon energy lock-in consti-tute core constraints.The research finds that the absence of ecological compensation standards and the structural imbalance of traditional subsidy policies induce diminishing marginal benefits in carbon reduction due to structural imbalances,while persistent funding shortages in low-carbon technology R&D further weaken emission reduction efficacy,exacerbating compatibility contradictions between emission policies and production practices.Through the comparison of domestic and foreign experiences,it is found that under the global wave of low-carbon transformation in agriculture,the ecological compensation optimization layer should establish a calculation system for the carbon sink value of cultivated land and differentiated compensation standards;the fiscal and taxation policy coordination layer should implement a tiered carbon tax on agricultural inputs and carbon sink pledge financing incentives.Constructing a fiscal expenditure and fiscal and taxation coordination mechanism that suits regional characteristics is the key path to resolving the contradiction between the technical economy and ecological sustainability of emission reduction.
文摘With the rapid development of the Chinese market economy system,income tax as an economic lever has become more and more prominent in regulating the economy.Since the beginning of the accounting reform,the Ministry of Finance has promulgated the accounting standards for income tax and put forward the corresponding procedures and methods,which is a leap forward in the development process of domestic income tax accounting.The relationship between income tax and accounting,the nature of income tax,and the basic characteristics and the apportionment of income tax accounting are expounded in this paper.Payable tax with impact accounting regulations,deferred with debt regulations,and balance sheet debt with income statement debt regulations are compared given the existing problems in the accounting treatment of domestic income tax,and the choice of applicable treatment methods are discussed.Finally,the accounting treatment of important income tax such as consolidated accounting statements,construction enterprises,tax losses,and discount of income tax liabilities are analyzed,and the treatment methods and corresponding countermeasures are put forward to improve the domestic income tax accounting problems.
基金Supported by the National Natural Science Foundation of China(No.82070995,No.82301256)Youth S&T Talent Support Programme of Guangdong Provincial Association for Science and Technology.
文摘AIM:To investigate the underlying factors by establishing a new paradigm for assessing control ability under stereopsis testing conditions.METHODS:This was a prospective observational study.We evaluated the control ability of intermittent exotropia(IXT)patients in three conditions:natural 2D optotype viewing,2D optotype viewing with polarized glasses,and 3D optotype viewing with polarized glasses.Recording with a smartphone,we captured videos to analyze the accurate time of spontaneous exodeviation and subsequent realignment before and after breaking fusion.Additionally,the correlation of stereopsis were also analyzed.RESULTS:A total of 48 patients(age range:4-33y;54.17%male)participated in the study.When viewing 3D optotypes with polarized glasses,their median control scores were 1(interquartile range,0-4)at distance and 0(0-1)at near.These scores were significantly better than those observed under natural viewing conditions,which were 2.5(1-5)at a distance and 1(0-3)at near(Friedman test,P=0.049).Furthermore,those subjects who exhibited exophoria(realignment within 2 seconds)while viewing 3D optotypes with polarized glasses were more likely to have measurable stereo vision(Kendall’sτb=-0.344,P=0.018).CONCLUSION:IXT patients exhibit enhanced control ability when using polarized glasses to view 3D optotypes,notably improving realignment capabilities.This expands our understanding of current tests and offers a potentially sensitive method for assessing IXT severity.
文摘In this paper, an improved Fast-R-CNN nuclear power cold source disaster biological image recognition algorithm is proposed to improve the safety operation of nuclear power plants. Firstly, the image data sets of the disaster-causing creatures hairy shrimp and jellyfish were established. Then, in order to solve the problems of low recognition accuracy and unrecognizable small entities in disaster biometrics, Gamma correction algorithm was used to optimize the image of the data set, improve the image quality and reduce the noise interference. Transposed convolution is introduced into the convolution layer to increase the recognition accuracy of small targets. The experimental results show that the recognition rate of this algorithm is 6.75%, 7.5%, 9.8% and 9.03% higher than that of ResNet-50, MobileNetv1, GoogleNet and VGG16, respectively. The actual test results show that the accuracy of this algorithm is obviously better than other algorithms, and the recognition efficiency is higher, which basically meets the preset requirements of this paper.
文摘AIM To investigate the effects of taxol onSMMC-7721 human hepatoma and itsmechanisms.METHODS In vitro cell growth was assessedby trypan blue exclusion method.Experimentalhepatoma model was established by seedingSMMC-7721 cells subcutaneously into Balb/c(nu/nu)nude mice.In vivo tumor growth wasdetermined by measurement of tumor diameterwith Vernier calipers.The syntheses of DNA,RNA and protein were analyzed by incorporationof ~3H-thymidine,~3H-uridine and ~3H-leucinerespectively.Using light and electronmicroscopes to observe the morphologicalchanges of cells including mitosis andapoptosis.RESULTS Taxol was effective against SMMC-7721 human hepatoma cell growth in the rangesof 2.5 nmol/L-10 nmol/L with mitotic arrestand apoptosis in vitro.DNA,RNA and proteinsyntheses in cells were also obviouslysuppressed by in vitro treatment of taxol for72 h.Taxol at 2.5 nmol/L reduced ~3H-thymidineuptake to about 34% of the control value(P【0.05).Increasing the dose of taxol to20 nmol/L resulted in a greater decrease in ~3H-thymidine incorporation to 60% of the controlvalue(P【0.01).At a concentration of 20 nmol/L,the ~3H-uridine and ~3H-leucine uptakeswere reduced to 52%(P【0.05)and 63%(P【0.01),respectively.In vivo,taxolsignificantly inhibited SMMC-7721 tumor growthat 10 mg/kg,i.p.,once daily for 10 d.A morethan 90% decrease in tumor volume wasobserved by day 11(P【0.01)similarly withmitotic arrest and cell apoptosis.CONCLUSION Taxol has a marked anticanceractivity in SMMC-7721 human hepatoma both invitro and in nude mice.Its mechanisms might beassociated with mitotic arrest,subsequently,apoptosis of the hepatoma cells.No obvioustoxicity was observed with in vivoadministration of taxoi.
基金The study was supported by the National Natural Science Foundation of China (No.81574065).
文摘Acupuncture has reportedly improved memory and cognitive impairment in both animal and clinical studies. It may be an effective treatment for Alzheimer's disease (AD). The purpose of this meta-analysis was to review the effectiveness of acupuncture for the treatment of AD. Eight databases were searched for articles published up to and including July 2017, and 13 studies fulfilling the inclusion criteria were identified. The main outcomes assessed were clinical efficacy rate, Mini-Mental State Examination score, Ability of Daily Living Scale score, Alzheimer's Disease Assessment Scale-Cognition score, Hasegawa's Dementia Scale (HDS) score, and adverse events. The methodological quality of the articles was assessed using Cochrane's risk of bias. All the studies compared the efficacy of acupuncture with that of medication, and were published in Chinese journals. Meta-analysis revealed that acupuncture yielded positive results as determined via all the indexes scored except the HDS (95% CI -0.26 to 0.90, Z=0.35, P=0.73). Only one of the studies reported adverse events associated with acupuncture and medication. The rate of adverse events in the medication group was 13%. In most of the studies assessed in the current metaanalysis, acupuncture alone was better than conventional western medicines for the treatment of AD.
基金The authors acknowledge the financial support from the Beijing Municipal Natural Science Foundation No.2184119(D.L.)and No.L182005(Y.L.)the Projects of Beijing Nova Programme No.Z171100001117018(Y.L.)+2 种基金Beijing Nova Programme Interdisciplinary Cooperation Project No.Z181100006218135(Y.L.and D.L.)the National Natural Science Foundations of China No.81571815(Y.L.),No.81871492(Y.L.)and No.51902344(D.L.)the Science Foundation of China University of Petroleum No.2462018BJB002(D.L.).
文摘Natural bone is a mineralized biological material, which serves a supportive and protective framework for the body, stores minerals for metabolism, and produces blood cells nourishing the body. Normally, bone has an innate capacity to heal from damage.However, massive bone defects due to traumatic injury, tumor resection, or congenital diseases pose a great challenge to reconstructive surgery. Scaffold-based tissue engineering(TE) is a promising strategy for bone regenerative medicine, because biomaterial scaffolds show advanced mechanical properties and a good degradation profile, as well as the feasibility of controlled release of growth and differentiation factors or immobilizing them on the material surface. Additionally, the defined structure of biomaterial scaffolds, as a kind of mechanical cue, can influence cell behaviors, modulate local microenvironment and control key features at the molecular and cellular levels. Recently, nano/micro-assisted regenerative medicine becomes a promising application of TE for the reconstruction of bone defects. For this reason, it is necessary for us to have in-depth knowledge of the development of novel nano/micro-based biomaterial scaffolds. Thus, we herein review the hierarchical structure of bone, and the potential application of nano/micro technologies to guide the design of novel biomaterial structures for bone repair and regeneration.
