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A Universal Strategy For N-Doped 2D Carbon Nanosheets With Sub-Nanometer Micropore For High-Performance Supercapacitor

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Energy & Environmental Materials 2021年第4期4卷 569-576页

作者： Jiangqi Zhou Li Jiang Chengyong shu Long Kong Iqbal Ahmad ya-Nan Zhou Wei Tang Xiaofei Sun Yuping wu State Key Laboratory for Mechanical Behavior of Materials School of Chemical Engineering and TechnologyXi'an Jiaotong UniversityXi’an 710049China State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power-SourcesShanghai 200245China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory for Manufacturing Systems Engineering School of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049China State Key Laboratory of Materials-Oriented Chemical Engineering School of Energy ScienceNanjing Tech UniversityNanjing 211800China

Preparing carbon nanosheets with precise control of open porous morphology via universal process and understanding the relationship between structure and capacitive performance are very urgent for achieving advanced ***,we propose a simple yet effective additive-free method to transform a bulk layered potassium phthalimide salt to novel nitrogen-doped twodimensional carbon sheets by self-activation during *** obtained samples showed large-sized and flat structure with lateral size around 10μm,uniform sub-nanometer micropore size distribution of about 0.65 nm dimension,large specific surface area up to 2276.7 m^(2)g^(-1),and suitable nitrogen *** from these merits,the optimized sample delivers a high specific capacitance of 345 F g^(-1)at 1 A g^(-1)and retains 270 F g^(-1)even at 50 A g^(-1)in6.0 M KOH ***,the symmetric supercapacitor shows maximum energy densities of 16.43 Wh kg^(-1)and 23.6 Wh kg^(-1)in 6.0 M KOH and 1.0 M Na_(2)SO_(4)electrolytes,***,on account the universality and simplicity of this method,the undoped as-prepared carbon sheet with uniform sub-nanometer micropore distribution can be synthesized from different potassium-containing salts with layered structure,which can be employed as a model for a deep understanding the effect of sub-nanometer micropores on capacitive *** find the number of micropores centered at 0.65 nm can be applied as one indicator to clarify the correlation between capacitance and critical pore size below 1 nm.

关键词： universal strategy sub-nanometer micropore carbon nanosheet supercapacitors

基于CNN和Transformer交叉教学的半监督医学图像分割

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陕西科技大学学报 2025年第1期43卷 185-192页

作者：杨云胡雯青杨虹吴亚男陕西科技大学电子信息与人工智能学院陕西西安710021 西安富德医疗电子有限公司陕西西安710075 西安计量技术研究院陕西西安710199

由于医学图像分割领域缺乏高质量的标注数据,半监督学习方法在医学图像语义分割任务中受到高度重视.为了充分利用卷积神经网络(Convolutional Neural Network,CNN)和Transformer在半监督学习中的优势,本文提出一种基于CNN与Transformer... 详细信息

由于医学图像分割领域缺乏高质量的标注数据,半监督学习方法在医学图像语义分割任务中受到高度重视.为了充分利用卷积神经网络(Convolutional Neural Network,CNN)和Transformer在半监督学习中的优势,本文提出一种基于CNN与Transformer交叉教学的半监督医学图像分割方法.该方法将经典的深度协同训练从一致性正则化简化为交叉教学,利用循环伪标签方案使两个网络的预测差异转换为无监督损失,以鼓励两个网络具有一致的低熵预测.所提方法在ISIC 2018数据集上进行实验,在采用20%的标注比例时,Dice系数和Jaccard系数分别达到87.25%和79.17%,相比于监督U-Net++的训练结果分别提升了2.89%和3.53%,并且优于目前主流的半监督学习方法,验证了所提方法在半监督医学图像分割上的有效性和泛化性.

关键词：半监督学习图像语义分割交叉教学循环伪标签

Self-organized criticality in multi-pulse gamma-ray bursts

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Frontiers of physics 2021年第1期16卷 91-98页

作者： Fen Lyu ya-Ping Li shu-Jin Hou Jun-Jie Wei Jin-Jun Geng Xue-Feng wu Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China University of Chinese Academy of Sciences Beijing 100049China Theoretical Division Los Alamos National LaboratoryLos AlamosNM 87545USA College of Physics and Electronic Engineering Nanyang Normal UniversityNanyang 473061China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Institute of Astronomy and Astrophysics University of TubingenAuf der Morgenstelle 10D-72076TubingenGermany

The variability in multi-pulse gamma-ray bursts(GRBs)may help to reveal the mechanism of underlying processes from the central *** investigate whether the self-organized criticality(SOC)phenomena exist in the prompt phase of GRBs,we statistically study the proper ties of GRBs with more than 3 pulses in each burst by fitting the distributions of several observed physical variables with a Markov Chain Monte Carlo approach,including the isotropic energy E_(iso),the duration time T,and the peak count rate P of each *** sample consists of 454 pulses in 93 GRBs observed by the CGRO/BATSE *** best-fitting values and uncertainties for these power-law indices of the differential frequency distributions are:α_(E)^(d)=1.54±0.09,α_(T)^(d)=1.82_(-0.15)^(+0.14)andα_(P)^(d)=2.09_(-0.19)^(0.18),while the power-law indices in the cumulative frequency distributions are:α_(E)^(c)=1.44_(-0.10)^(+0.08),α_(T)^(c)=1.75_(-0.13)^(0.11)andα_(P)^(c)=1.99_(-0.19)^(+0.16).We find that these distributions are roughly consistent with the physical framework of a Fractal-Diffusive,Self^Organized Criticality(FD-SOC)system with the spatial dimension S=3 and the classical diffusionβ=*** results support that the jet responsible for the GRBs should be magnetically dominated and magnetic instabilities(e.g.,kink model,or tearing-model instability)lead the GRB emission region into the SOC state.

关键词： gamma-ray burst general methods statistical

Software crowdsourcing for developing Software-as-a-Service

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Frontiers of Computer Science 2015年第4期9卷 554-565页

作者： Xiaolan XU Wenjun wu ya WANG Yuchuan wu Chinese Institute of Electronics Beijing 100036 China State Key Laboratory of Software Development Environment Beihang University Beijing 100191 China School of Software Engineering Beihang University Beijing 100191 China

Recently software crowdsourcing has become a viable development paradigm for Software-as-a-Service （SaaS） ecosystems. TopCoder, one of the largest competi- tive programming communities, enables enterprises to tap into its global talent pool and crowdsource a variety of SaaS development tasks including requirement analysis, architec- ture design, code, and testing. Many researchers have pro- posed auction-based modelling methods to characterize gen- eral software crowdsourcing. But there are few papers on the comprehensive analysis of SaaS crowdsourcing process and developer community. This paper introduces a holistic analysis framework to model the SaaS-oriented software crowdsourcing from two dimensions： individual behavior in crowdsourcing contests and collective competition in the community. The framework includes a game-theoretical model to describe the compet- itive nature of software crowdsourcing process. Moreover, the framework defines a competition network to characterize the topological properties of a crowdsourcing community for SaaS development. The analysis of this model indicates that the success of a competitive software crowdsourcing project essentially depends upon the networks of key participants with sufficient skills and dedication for the project. This is validated by a large historical data collected from the Top- Coder website over a ten-year period.

关键词： SaaS Software Crowdsourcing TopCoder

Semi-analytical and computational investigation of different dust loading structures affecting the performance of a fibrous air filter

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Particuology 2014年第2期12卷 60-65页

作者： Bin Xu ya wu Pengyi Cui Department of Environmental Engineering Tongji University State Key Laboratory of Pollution Control and Resource Reuse Tongji University

In this study, a semi-analytical model was developed to illustrate the relationship between filtration performance （filtration efficiency and pressure drop） and dust loading under two different particle deposit structures based on theoretical analysis and computational fluid dynamic （CFD） technology. Under the compact deposit structure, within the practical parameter ranges （fiber diameter, air velocity, dust loading mass）, a slight efficiency enhancement （∽10%） occurred at the most penetration particle size （MPPS） and pressure drop increased significantly （∽100%） in response to the solidity increase from 5% to 15%. However, under the dendritic particle deposit structure, both filtration efficiency （∽40%） and pressure drop （4600%） increased significantly with the same solidity increase due to the larger air velocity and swerve change between fibers.

关键词： Particle filtrationDeposition structureLiquid droplet filtrationFilter dust loading

Human umbilical cord Wharton’s jelly-derived mesenchymal stem cell transplantation could improve diabetic intracavernosal pressure

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Asian Journal of Andrology 2022年第2期24卷 171-175页

作者： Jian-Hong wu Dong-ya Wang Lu Sheng Wei-Qing Qian shu-Jie Xia Qi Jiang Department of Urology Shanghai General Hospital of Nanjing Medical UniversityShanghai 200080China Department of Urology Huadong Hospital Affiliated to Fudan UniversityShanghai 200040China Department of Urology Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China

Mesenchymal stem cells(MSCs)secrete various cytokines with angiogenic and neuroprotective *** study aimed to assess the effects of human umbilical cord Wharton’s jelly-derived MSCs(hWJ-MSCs)on diabetes-related intracavernosal pressure(ICP)impairment in ***-MSCs were isolated from human umbilical cord Wharton’s jelly and transplanted into the corpus cavernosum of streptozotocin(STZ)-induced diabetic rats by unilateral *** erectile function was evaluated at 4 weeks,as well as the expression levels of vascular endothelial growth factor(VEGF),basic fibroblast growth factor(bFGF),endothelial nitric oxide synthase(eNOS),and insulin-like growth factor 1(IGF1).STZ-induced diabetic rats showed impaired ICP,which was significantly improved by hWJ-MSC ***,eNOS,IGF1,and bFGF expression levels were higher in hWJ-MSC injection sites than those in control ones in STZ-induced diabetic *** results suggest that hWJ-MSC transplantation might improve diabetic erectile dysfunction through increased production of paracrine growth factors,highlighting a novel potential therapeutic option for erectile dysfunction.

关键词： diabetes endothelial nitric oxide synthase erectile dysfunction mesenchymal stem cells vascular endothelial growth factor

Optimization of slow-release fertilizer application improves lotus rhizome quality by affecting the physicochemical properties of starch

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Journal of Integrative Agriculture 2023年第4期22卷 1045-1057页

作者： ZHAO shu-ping DENG Kang-ming ZHU ya-mei JIANG Tao wu Peng FENG Kai LI Liang-jun College of Horticulture and Landscape Architecture Yangzhou UniversityYangzhou 225009P.R.China Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China Yangzhou UniversityYangzhou 225009P.R.China

To achieve the dual goals of high yield and good quality with low environmental costs,slow-release fertilizer(SRF)has been widely used in lotus cultivation as new type of fertilizer instead of traditional nitrogen ***,the optimal amount of SRF and how it would promote lotus rhizome quality remain *** study was designed to investigate the photosynthetic characteristics and the synthesis,accumulation,and physicochemical properties of lotus rhizome starches under six SRF levels(CK,S1,S2,S3,S4,and S5).Compared with CK(0 kg ha^(–1)),the net photosynthetic rate(P_(n))and SPAD values of leaves remained at higher levels under SRF *** research showed that SRF increased the lotus rhizome yield,the contents of amylose,amylopectin,and total starch,and the number of starch *** the six SRF levels,S3(1035 kg ha^(–1))showed the greatest difference from CK and produced the highest *** the increasing SRF levels,the peak,hot and final viscosities decreased at first and then increased,but the setback viscosity and pasting temperature *** order to interpret these changes at the molecular level,the activities of key enzymes and relative expression levels of starch accumulation related genes were *** of these parameters also increased under SRF treatment,especially under the S3 *** results of this study show that SRF,especially S3(1035 kg ha^(–1)),is a suitable fertilizer option for lotus planting which can improve lotus rhizome quality by affecting starch accumulations related enzymes and *** results will be useful for SRF application to high-quality lotus rhizome production with low environmental costs.

关键词： Nelumbo nucifera Gaertn. slow-release fertilizer(SRF) lotus rhizome yield starch gene expression

Spatial Distribution of HOCN Around Sagittarius B2

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Research in Astronomy and Astrophysics 2022年第3期22卷 61-71页

作者： Si-Qi Zheng Juan Li Jun-Zhi Wang Feng Gao ya-Jun wu shu Liu Shang-Huo Li Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210033China University of Chinese Academy of Sciences Beijing 100049China Hamburger Sternwarte Universitaet HamburgGojenbergsweg 112D-21029HamburgGermany National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Korea Astronomy and Space Science Institute 776 Daedeokdae-roYuseong-guDaejeon 34055Republic of Korea

HOCN and HNCO abundance ratio in molecular gas can tell us the information of their formation *** performed high-sensitivity mapping observations of HOCN,HNCO,and HNC^(18)O lines around Sagittarius B2(Sgr B2)with the IRAM 30 m telescope at the 3 mm *** 4_(04)-3_(03)and HOCN 4_(04)-3_(03)are used to obtain the abundance ratio of HNCO to *** ratio of HNCO 4_(04)-3_(03)to HNC^(18)O 4;-3;is used to calculate the optical depth of HNCO 4_(04)-3_(03).The abundance ratio of HOCN and HNCO is observed to range from 0.4%to0.7%toward most positions,which agrees well with the gas-grain ***,the relative abundance of HOCN is observed to be enhanced toward the direction of Sgr B2(S),with HOCN to HNCO abundance ratio of~0.9%.The reason for that still needs further *** on the intensity ratio of HNCO and HNC^(18)O lines,we updated the isotopic ratio of;O/;O to be 296±54 in Sgr B2.

关键词： ISM:abundances ISM:interstellar clouds ISM:interstellar molecules

Improvement of location methods based on RFID

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The Journal of China Universities of Posts and Telecommunications 2013年第6期20卷 36-41页

作者： wu Ling HUANG Li-ya Institute of Electronic Science and Engineering Nanjing University of Posts and Telecommunications

The most common location algorithms based on received signal strength （RSS） are location identification based on dynamic active radio frequency identification （LANDMARC） and virtual reference elimination （VIRE）. However, both the original algorithms suffer from some drawbacks. In this paper, several aspects of the two original algorithms have been modified to reduce the positioning errors. Firstly, Lagrange interpolation has been used instead of linear interpolation. Secondly, adaptive threshold has been introduced in the new algorithm. Thirdly, insert virtual reference tags to improve the location accuracy of the boundary of the sensing area. Finally, combine LANDMARC with VIRE to absorb both advantages. Compared with the original algorithms, on average, simulated results show that the modified algorithms can improve the location performance efficiently and achieve the goal of accurate positioning in indoor environment.

关键词： LANDMARC VIRE received signal strength indicator (RSSI) Lagrange adaptive threshold