Introduction:This study protocol specifies the primary research line and theoretical framework of the 2023 Survey of the Psychology and Behavior of the Chinese Population.It aims to establish a consistent database of ...Introduction:This study protocol specifies the primary research line and theoretical framework of the 2023 Survey of the Psychology and Behavior of the Chinese Population.It aims to establish a consistent database of Chinese residents'psychological and behavioral surveys through multi-center and large-sample cross-sectional surveys to provide robust data support for developing research in related fields.It will track the public's physical and psychological health more comprehensively and systematically.Methods:The study was conducted from June 20,2023 to August 31,2023,using stratified and quota sampling methods.A total of 150 cities across 800 communities/villages were surveyed,selected from China(Despite extensive coordination,we have been unable to contact our counterparts in the Taiwan region of China to obtain relevant statistical data).The questionnaires were distributed to the public one-on-one and face-to-face by trained surveyors.The questionnaires included basic information about the individual,personal health status,basic information about the family,the social environment in which the individual lives,psychological condition scales,behavioral level scales,other scales,and attitudes towards topical social issues.Supervisors conducted quality control during the distribution process and returned questionnaires,logically checked and cleaned for data analysis.Discussion:Data collection has been finished,and scientific outputs based on this data will support the development of health promotion strategies in China and globally.In the aftermath of the pandemic,it will guide policymakers and healthcare organizations to improve their existing policies and services to maximize the physical and mental health of the Chinese population.Trial Registration:This study was filed in the National Health Security Information Platform(Record No.:MR-37-23-017876)and officially registered in the China Clinical Trials Registry(Registration No.:ChiCTR2300072573).展开更多
Recently,a disruptive idea was reported about the discovery of a new type of battery named Liquid Displacement Battery(LDB)comprising liquid metal electrodes and molten salt electrolyte.This cell featured a novel conc...Recently,a disruptive idea was reported about the discovery of a new type of battery named Liquid Displacement Battery(LDB)comprising liquid metal electrodes and molten salt electrolyte.This cell featured a novel concept of a porous electronically conductive faradaic membrane instead of the traditional ion-selective ceramic membrane.LDBs are attractive for stationary storage applications but need mitigation against self-discharge.In the instant battery chemistry,Li|LiCl-PbCl_(2)|Pb,reducing the diffusion coefficient of lead ions can be a way forward and a solution can be the addition of Pb O to the electrolyte.The latter acts as a supplementary barrier and complements the function of the faradaic membrane.The remedial actions improved the cell’s coulombic efficiency from 92%to 97%without affecting the voltage efficiency.In addition,the limiting current density of a 500 m Ah cell increased from 575 to 831 m A cm;and the limiting power from 2.53 to 3.66 W.Finally,the effect of Pb O on the impedance and polarization of the cell was also studied.展开更多
Using FFC-Cambridge Process to prepare Si from SiO2 is a promising method to prepare nanostructured and highly pure silicon for solar cells.However,the method still has many problems unsolved and the controlling effec...Using FFC-Cambridge Process to prepare Si from SiO2 is a promising method to prepare nanostructured and highly pure silicon for solar cells.However,the method still has many problems unsolved and the controlling effect of the cell voltage on silicon product is not clear.Here we report in this article that nano cluster-like silicon product with purity of 99.95%has been prepared by complete conversion of raw material SiO2,quartz glass plate,using constant cell voltage electrolysis FFC-Cambridge Process.By analysis of XRD,EDS,TEM,HRTEM and ICP-AES as well as the discussion from the thermodynamics calculation,the morphology and components of the product based on the change of cell voltage are clarified.It is clear that pure silicon could be prepared at the cell voltage of 1.7 2.1 V in this reaction system.The silicon material have cluster-like structure which are made of silicon nanoparticles in 20 100 nm size.Interestingly,the cluster-like nano structure of the silicon can be tuned by the used cell voltage.The purity,yield and the energy cost of silicon product prepared at the optimized cell voltage are discussed.The purity of the silicon product could be further improved,hence this method is promising for the preparation of solar grade silicon in future.展开更多
A novel flotation froth image segmentation based on threshold level set method is put forward in view of the problem of over-segmentation and under-segmentation which occurs when the existing method segmented the flot...A novel flotation froth image segmentation based on threshold level set method is put forward in view of the problem of over-segmentation and under-segmentation which occurs when the existing method segmented the flotation froth images. Firstly, the proposed method adopts histogram equalization to improve the contrast of the image, and then chooses the upper threshold and lower threshold from grey value of histogram of the image equalization, and complete image segmentation using the level set method. In this paper, the model which integrates edge with region level set model is utilized, and the speed energy term is introduced to segment the target. Experimental results show that the proposed method has better segmentation results and higher segmentation efficiency on the images with under-segmentation and incorrect segmentation, and it is meaningful for ore dressing industrial.展开更多
In this study, a viscous-inviscid method based on velocity decomposition is presented. The velocity of the flow field is decomposed into viscous velocity and inviscid velocity, the inviscid velocity is applied for the...In this study, a viscous-inviscid method based on velocity decomposition is presented. The velocity of the flow field is decomposed into viscous velocity and inviscid velocity, the inviscid velocity is applied for the whole domain, which includes the damping area, and the remaining viscous velocity is just acting on a small domain around the ship hull according to the boundary layer theory. The remaining viscous velocity is computed by a modified N-S equation which coupled the inviscid part, after the inviscid velocity is obtained by solving Euler equation. The simulation of Wigley hull advancing in calm water is accomplished with present method also the decomposed velocity has been studied. The result shows the present method is robust and can be a practical method for partial viscous correction.展开更多
Medical image segmentation is one of the key technologies in computer aided diagnosis. Due to the complexity and diversity of medical images, the wavelet multi-scale analysis is introduced into GVF (gradient vector fl...Medical image segmentation is one of the key technologies in computer aided diagnosis. Due to the complexity and diversity of medical images, the wavelet multi-scale analysis is introduced into GVF (gradient vector flow) snake model. The modulus values of each scale and phase angle values are calculated using wavelet transform, and the local maximum points of modulus values, which are the contours of the object edges, are obtained along phase angle direction at each scale. Then, location of the edges of the object and segmentation is implemented by GVF snake model. The experiments on some medical images show that the improved algorithm has small amount of computation, fast convergence and good robustness to noise.展开更多
Side channel attack may result in user key leakage as scan test techniques are applied for crypto-graphic chips. Many secure scan designs have been proposed to protect the user key. This paper meticulously selects thr...Side channel attack may result in user key leakage as scan test techniques are applied for crypto-graphic chips. Many secure scan designs have been proposed to protect the user key. This paper meticulously selects three current scan test techniques, analyses their advantages and disadvantages and also compares them in security and area overhead. Users can choose one of them according to the requirements and further combination can be implemented to achieve better performance.展开更多
目的探索细胞焦亡在心血管疾病中的作用研究现状,分析总结当前研究热点未来发展方向。方法利用文献计量分析方法,通过数据库Web of Science和知网进行文献检索“细胞焦亡”和“心血管疾病”,收集2014年—2024年间与心血管疾病和细胞焦...目的探索细胞焦亡在心血管疾病中的作用研究现状,分析总结当前研究热点未来发展方向。方法利用文献计量分析方法,通过数据库Web of Science和知网进行文献检索“细胞焦亡”和“心血管疾病”,收集2014年—2024年间与心血管疾病和细胞焦亡相关的文献和研究资料,利用CiteSpace软件进行可视化分析并绘制图谱。结果共纳入中英文文献398篇,发文量呈上升趋势;发文量最多的国家为中国;且机构以医科大学为主;靠前的作者有刘达越、焦运等;WOS数据库中关键词频率前三的有Nlrp3炎性体、activation、oxidative stress;知网数据库中为细胞焦亡、焦亡;文献被引最高的文章题目为“Pyroptosis:Gasdermin-Mediated Programmed Necrotic Cell Death”,已达36次。结论文献计量分析直观的展示了细胞焦亡和心血管疾病发展现状,两者之间的关系已经达到新的高度。目前,机制、死亡率、血管内皮细胞为该领域的研究热点及发展动态,应深化机制研究,进一步探究细胞焦亡在心血管疾病中的具体作用机制;且该领域发文量较少,应加强机构和国家之间的跨界合作,推动心血管疾病领域与其他学科的交叉融合。展开更多
基金Research project of China Medical Education Association,Grant/Award Number:CMEA[2023]:No.0003。
文摘Introduction:This study protocol specifies the primary research line and theoretical framework of the 2023 Survey of the Psychology and Behavior of the Chinese Population.It aims to establish a consistent database of Chinese residents'psychological and behavioral surveys through multi-center and large-sample cross-sectional surveys to provide robust data support for developing research in related fields.It will track the public's physical and psychological health more comprehensively and systematically.Methods:The study was conducted from June 20,2023 to August 31,2023,using stratified and quota sampling methods.A total of 150 cities across 800 communities/villages were surveyed,selected from China(Despite extensive coordination,we have been unable to contact our counterparts in the Taiwan region of China to obtain relevant statistical data).The questionnaires were distributed to the public one-on-one and face-to-face by trained surveyors.The questionnaires included basic information about the individual,personal health status,basic information about the family,the social environment in which the individual lives,psychological condition scales,behavioral level scales,other scales,and attitudes towards topical social issues.Supervisors conducted quality control during the distribution process and returned questionnaires,logically checked and cleaned for data analysis.Discussion:Data collection has been finished,and scientific outputs based on this data will support the development of health promotion strategies in China and globally.In the aftermath of the pandemic,it will guide policymakers and healthcare organizations to improve their existing policies and services to maximize the physical and mental health of the Chinese population.Trial Registration:This study was filed in the National Health Security Information Platform(Record No.:MR-37-23-017876)and officially registered in the China Clinical Trials Registry(Registration No.:ChiCTR2300072573).
基金financially supported by the research unit of Group Sadoway Laboratory,Department of Materials Science and Engineering,Massachusetts Institute of Technology,77 Massachusetts Avenue,Cambridge,MA,02139-4307,United Statesthe Portuguese Foundation for Science and Technology(FCT)for his Ph.D.scholarship(PD/BD/128041/2016)+2 种基金financially supported by the Base Funding(UIDB/00511/2020)of the Laboratory for Process Engineering,Environment,Biotechnology and Energy–LEPABEfunded by national funds through the FCT/MCTES(PIDDAC)continuous support from MIT Portugal Program。
文摘Recently,a disruptive idea was reported about the discovery of a new type of battery named Liquid Displacement Battery(LDB)comprising liquid metal electrodes and molten salt electrolyte.This cell featured a novel concept of a porous electronically conductive faradaic membrane instead of the traditional ion-selective ceramic membrane.LDBs are attractive for stationary storage applications but need mitigation against self-discharge.In the instant battery chemistry,Li|LiCl-PbCl_(2)|Pb,reducing the diffusion coefficient of lead ions can be a way forward and a solution can be the addition of Pb O to the electrolyte.The latter acts as a supplementary barrier and complements the function of the faradaic membrane.The remedial actions improved the cell’s coulombic efficiency from 92%to 97%without affecting the voltage efficiency.In addition,the limiting current density of a 500 m Ah cell increased from 575 to 831 m A cm;and the limiting power from 2.53 to 3.66 W.Finally,the effect of Pb O on the impedance and polarization of the cell was also studied.
基金supported by the Solar Energy Initiative of the Knowledge Innovation Program of the Chinese Academy of Sciences(Grant No.KGCX2-YW-395)
文摘Using FFC-Cambridge Process to prepare Si from SiO2 is a promising method to prepare nanostructured and highly pure silicon for solar cells.However,the method still has many problems unsolved and the controlling effect of the cell voltage on silicon product is not clear.Here we report in this article that nano cluster-like silicon product with purity of 99.95%has been prepared by complete conversion of raw material SiO2,quartz glass plate,using constant cell voltage electrolysis FFC-Cambridge Process.By analysis of XRD,EDS,TEM,HRTEM and ICP-AES as well as the discussion from the thermodynamics calculation,the morphology and components of the product based on the change of cell voltage are clarified.It is clear that pure silicon could be prepared at the cell voltage of 1.7 2.1 V in this reaction system.The silicon material have cluster-like structure which are made of silicon nanoparticles in 20 100 nm size.Interestingly,the cluster-like nano structure of the silicon can be tuned by the used cell voltage.The purity,yield and the energy cost of silicon product prepared at the optimized cell voltage are discussed.The purity of the silicon product could be further improved,hence this method is promising for the preparation of solar grade silicon in future.
文摘A novel flotation froth image segmentation based on threshold level set method is put forward in view of the problem of over-segmentation and under-segmentation which occurs when the existing method segmented the flotation froth images. Firstly, the proposed method adopts histogram equalization to improve the contrast of the image, and then chooses the upper threshold and lower threshold from grey value of histogram of the image equalization, and complete image segmentation using the level set method. In this paper, the model which integrates edge with region level set model is utilized, and the speed energy term is introduced to segment the target. Experimental results show that the proposed method has better segmentation results and higher segmentation efficiency on the images with under-segmentation and incorrect segmentation, and it is meaningful for ore dressing industrial.
文摘In this study, a viscous-inviscid method based on velocity decomposition is presented. The velocity of the flow field is decomposed into viscous velocity and inviscid velocity, the inviscid velocity is applied for the whole domain, which includes the damping area, and the remaining viscous velocity is just acting on a small domain around the ship hull according to the boundary layer theory. The remaining viscous velocity is computed by a modified N-S equation which coupled the inviscid part, after the inviscid velocity is obtained by solving Euler equation. The simulation of Wigley hull advancing in calm water is accomplished with present method also the decomposed velocity has been studied. The result shows the present method is robust and can be a practical method for partial viscous correction.
文摘Medical image segmentation is one of the key technologies in computer aided diagnosis. Due to the complexity and diversity of medical images, the wavelet multi-scale analysis is introduced into GVF (gradient vector flow) snake model. The modulus values of each scale and phase angle values are calculated using wavelet transform, and the local maximum points of modulus values, which are the contours of the object edges, are obtained along phase angle direction at each scale. Then, location of the edges of the object and segmentation is implemented by GVF snake model. The experiments on some medical images show that the improved algorithm has small amount of computation, fast convergence and good robustness to noise.
文摘Side channel attack may result in user key leakage as scan test techniques are applied for crypto-graphic chips. Many secure scan designs have been proposed to protect the user key. This paper meticulously selects three current scan test techniques, analyses their advantages and disadvantages and also compares them in security and area overhead. Users can choose one of them according to the requirements and further combination can be implemented to achieve better performance.
