检索结果-南通市图书馆

Optimization on magnetic properties of Nd-doped fe_(3)O_(4) nanoparticles for magnetic shielding fabrics

journal of Rare Earths 2024年第4期42卷 683-689页

作者： Xiaolei Song Congzhu xu Yuyan Wang Huizhen Ke Yonggui Li Qufu Wei Xinqun feng faculty of Clothing and Design Minjiang UniversityFuzhou350108China fujian Key Laboratory of Novel functional Textile fibers and Materials Minjiang UniversityFuzhou350108China College of Textile and Clothing Jiangnan UniversityWuxi214122China College of fashion and Design Donghua UniversityShanghai201620China

High magnetic protective fabrics with rare earth Nd doped fe_(3)O_(4) nanoparticles were fabricated via a grafting *** structure,crystal form,and elemental composition of nanoparticles were investigated by transmission electron microscopy,energy dispersive X-ray,X-ray powder diffraction,and X-ray photoelectron *** obtained Ndfe_(2)O_(4) nanoparticles show spherical shape with fine dispersion and reasonable element ***,they demonstrate fine superparamagnetic properties with a magnetic saturation value of 29.25 A·m^(2)/g and low coercivity of 1.902 mT through the vibrating sample magnetometry technique,which can be well developed in magnetic shielding protective ***,the cotton fabrics with plain weave were finished by a proofing rapier loom as a *** Ndfe_(2)O_(4) nanoparticles underwent some appropriate surface modification and then were grafted onto the cotton fabrics by a bridge agent of N,N’-dissuccinimidyl *** morphology,structure,dispersion effect,and electromagnetic protective properties of the fabrics were observed through scanning electron microscopy,fourier infrared spectroscopy,thermogravimetric analysisdifferential scanning calorimetry(TG-DSC),and a vector network *** reliable fabrics with grafting reaction on the interface are expected to have potential applications in the field of electromagnetic protection and biomedicine fields.

关键词： Magnetic property Nd fe_(3)O_(4)nanoparticles Magnetic shielding fabrics Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Large potential of strengthening the land carbon sink in China through anthropogenic interventions

引用

Science Bulletin 2024年第16期69卷 2622-2631页

作者： xu Yue Hao Zhou Yang Cao Hong Liao Xiaofei Lu Zhen Yu Wenping Yuan Zhu Liu Yadong Lei Stephen Sitch jürgen Knauer Huijun Wang jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science&Technology(NUIST)Nanjing 210044China College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China jiangsu Nanjing Environmental Monitoring Center Nanjing 210013China Key Laboratory of Agrometeorology of jiangsu Province Institute of EcologySchool of Applied MeteorologyNUISTNanjing 210044China Institute of Carbon Neutrality Sino-French Institute for Earth System ScienceCollege of Urban and Environmental SciencesPeking UniversityBeijing 100871China Department of Earth System Science Tsinghua UniversityBeijing 100084China State Key Laboratory of Severe Weather and Key Laboratory of Atmospheric Chemistry of CMA Chinese Academy of Meteorological SciencesBeijing 100081China College of Life and Environmental Sciences University of ExeterExeter EX44RJUK Hawkesbury Institute for the Environment Western Sydney UniversityPenrith 2751Australia Key Laboratory of Meteorological Disaster Ministry of EducationJoint International Research Laboratory of Climate and Environment ChangeCollaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNUISTNanjing 210044China

The terrestrial ecosystem in China mitigates 21%-45%of the national contemporary fossil fuel CO_(2) emissions every *** and strengthening the land carbon sink is essential for reaching China’s target of carbon ***,this sink is subject to large uncertainties due to the joint impacts of climate change,air pollution,and human ***,we explore the potential of strengthening land carbon sink in China through anthropogenic interventions,including forestation,ozone reduction,and litter removal,taking advantage of a well-validated dynamic vegetation model and meteorological forcings from 16 climate *** anthropogenic interventions,considering Shared Socioeconomic Pathways(SSP)scenarios,the land sink is projected to be 0.26-0.56 Pg C a^(-1) at 2060,to which climate change contributes 0.06-0.13 Pg C a^(-1) and CO_(2) fertilization contributes 0.08-0.44 Pg C a^(-1) with the stronger effects for higher emission *** anthropogenic interventions,under a close-to-neutral emission scenario(SSP1-2.6),the land sink becomes 0.47-0.57 Pg C a^(-1) at 2060,including the contributions of 0.12 Pg C a^(-1) by conservative forestation,0.07 Pg C a^(-1) by ozone pollution control,and 0.06-0.16 Pg C a^(-1) by 20%litter removal over planted *** sink can mitigate 90%-110% of the residue anthropogenic carbon emissions in 2060,providing a solid foundation for the carbon neutrality in China.

关键词： Carbon sink forestation Ozone Litter removal

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ideal balanced pairs in extriangulated categories

引用

Science China Mathematics 2024年

作者： Rongrong xu Xianhui fu Northeast Normal University School of Mathematics and Statistics

Let C=(C, E, s) be an extriangulated category. In this paper, we give the notion of ideal balanced pairs in C and some equivalent characterizations of ideal balanced pairs. We show that there is a one-to-one correspondence between balanced pairs and ideal balanced pairs satisfying certain conditions when C is of a negative first extension. We also prove that there is a bijective correspondence between ideal balanced pairs(I, j) and additive subfunctors f?E with enough projective morphisms and enough injective morphisms in C.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Atomic Dispersed Hetero‑Pairs for Enhanced Electrocatalytic CO_(2)Reduction

引用

Nano-Micro Letters 2024年第1期16卷 55-67页

作者： Zhaoyong jin Meiqi Yang Yilong Dong Xingcheng Ma Ying Wang jiandong Wu jinchang fan Dewen Wang Rongshen Xi Xiao Zhao Tianyi xu jingxiang Zhao Lei Zhang David j.Singh Weitao Zheng Xiaoqiang Cui State Key Laboratory of Automotive Simulation and Control School of Materials Science and EngineeringKey Laboratory of Automobile Materials of MOEElectron Microscopy CenterJilin UniversityChangchun 130012People’s Republic of China Key Laboratory of Photonic and Electronic Bandgap Materials Ministry of Educationand College of Chemistry and Chemical EngineeringHarbin Normal UniversityHarbin 150025People’s Republic of China College of Chemistry Jilin UniversityChangchun 130012People’s Republic of China Department of Physics and Astronomy and Department of Chemistry University of MissouriColumbiaMO 65211USA

Electrochemical carbon dioxide reduction reaction(CO_(2)RR)involves a variety of intermediates with highly correlated reaction and ad-desorption energies,hindering optimization of the catalytic *** example,increasing the binding of the*COOH to the active site will generally increase the*CO desorption *** this relationship may be expected to dramatically improve the intrinsic activity of CO_(2)RR,but remains an unsolved ***,we addressed this conundrum by constructing a unique atomic dispersed hetero-pair consisting of Mo-fe di-atoms anchored on N-doped carbon *** system shows an unprecedented CO_(2)RR intrinsic activity with TOf of 3336 h−1,high selectivity toward CO production,faradaic efficiency of 95.96%at−0.60 V and excellent *** calculations show that the Mo-fe diatomic sites increased the*COOH intermediate adsorption energy by bridging adsorption of*COOH *** the same time,d-d orbital coupling in the Mo-fe di-atom results in electron delocalization and facilitates desorption of*CO ***,the undesirable correlation between these steps is *** work provides a promising approach,specifically the use of di-atoms,for breaking unfavorable relationships based on understanding of the catalytic mechanisms at the atomic scale.

关键词： CO_(2)reduction reaction Atomic dispersed catalyst Hetero-diatomic pair Ad-desorption energy Linear scaling relation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multi-omics analysis of adamantinomatous craniopharyngiomas reveals distinct molecular subgroups with prognostic and treatment response significance

引用

Chinese Medical journal 2024年第7期137卷 859-870页

作者： Xianlong Wang Chuan Zhao jincheng Lin Hongxing Liu Qiuhong Zeng Huadong Chen Ye Wang Dapeng xu Wen Chen Moping xu En Zhang Da Lin Zhixiong Lin Department of Bioinformatics School of Medical Technology and EngineeringKey Laboratory of Medical BioinformaticsKey Laboratory of Ministry of Education for Gastrointestinal CancerFujian Medical UniversityFuzhouFujian 350122China Department of Neurosurgery Sanbo Brain HospitalCapital Medical UniversityBeijing 100093China

Background:Adamantinomatous craniopharyngioma(ACP)is the commonest pediatric sellar *** effective drug is available and interpatient heterogeneity is *** study aimed to identify distinct molecular subgroups of ACP based on the multi-omics profiles,imaging findings,and histological features,in order to predict the response to anti-inflammatory treatment and ***:Totally 142 Chinese cases diagnosed with craniopharyngiomas were profiled,including 119 ACPs and 23 papillary ***-exome sequencing(151 tumors,including recurrent ones),RNA sequencing(84 tumors),and DNA methylome profiling(95 tumors)were *** clustering and non-negative matrix factorization were used for subgrouping,and Cox regression were utilized for prognostic evaluation,***:Three distinct molecular subgroups were identified:WNT,ImA,and *** WNT subgroup showed higher Wnt/β-catenin pathway activity,with a greater number of epithelial cells and more predominantly solid *** ImA and ImB subgroups had activated inflammatory and interferon response pathways,with enhanced immune cell infiltration and more predominantly cystic ***-activated protein kinases(MEK/MAPK)signaling was activated only in ImA samples,while IL-6 and epithelial-mesenchymal transition biomarkers were highly expressed in the ImB group,mostly consisting of *** degree of astrogliosis was significantly elevated in the ImA group,with severe finger-like protrusions at the invasive front of the *** molecular subgrouping was an independent prognostic factor,with the WNT group having longer event-free survival than ImB(Cox,P=0.04).ImA/ImB cases were more likely to respond to immune checkpoint blockade(ICB)therapy than the WNT group(Pf subtyping markers,CD38 was significantly downregulated in WNT compared with ImA and ImB(P=0.01).Conclusions:ACP comprises three molecular subtypes with distinct

关键词： Craniopharyngioma Central nervous system tumor Precision medicine beta Catenin Proto-Oncogene Proteins B-raf

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis of application range of simplified models for field to thermo-field to thermionic emission processes from the cathode

引用

Plasma Science and Technology 2024年第9期26卷 51-60页

作者： Li SUN Zhuo DAI Ming xu Wei WANG Zengyao LI Applied Physics Department Xi’an University of TechnologyXi’an 710048People’s Republic of China Key Laboratory of Thermo-fluid Science and Engineering Ministry of EducationSchool of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an 710049People’s Republic of China

Electron emission plays a dominant role in plasma-cathode interactions and is a key factor in many plasma phenomena and industrial *** is necessary to illustrate the various electron emission mechanisms and the corresponding applicable description models to evaluate their impacts on discharge *** this study,detailed expressions of the simplified formulas valid for field emission to thermo-field emission to thermionic emission typically used in the numerical simulation are proposed,and the corresponding application ranges are determined in the framework of the Murphy-Good theory,which is commonly regarded as the general model and to be accurate in the full range of conditions of the validity of the *** parameterization was used to evaluate the emission current density of the Murphy-Good formula,and a deviation factor was defined to obtain the application ranges for different work functions(2.5‒5 eV),cathode temperatures(300‒6000 K),and emitted electric fields(10^(5) to 10^(10) V·m^(-1)).The deviation factor was shown to be a nonmonotonic function of the three parameters.A comparative study of particle number densities in atmospheric gas discharge with a tungsten cathode was performed based on the one-dimensional implicit particle-in-cell(PIC)with the Monte Carlo collision(MCC)method according to the aforementioned application *** was found that small differences in emission current density can lead to variations in the distributions of particle number density due to changes in the collisional *** study provides a theoretical basis for selecting emission models for subsequent numerical simulations.

关键词： electron emission processes application range Murphy-Good theory implicit particlein-cell Monte Carlo collision method

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Efficiency-first spraying mission arrangement optimization with multiple UAVs in heterogeneous farmland with varying pesticide requirements

引用

Information Processing in Agriculture 2024年第2期11卷 237-248页

作者： Yang Li Yanqiang Wu Xinyu xue xuemei Liu Yang xu Xinghua Liu Nanjing Institute of Agricultural Mechanization Ministry of Agriculture and Rural AffairsNanjing 210014PR China College of Mechanical&Electronic Engineering Shandong Agricultural UniversityTai'an 271018PR China Key Laboratory of Modern Agricultural Equipment Ministry of Agriculture and Rural AffairsNanjing 210014PR China Shandong Provincial Key Laboratory of Horticultural Machinery and Equipment Tai’an 271018PR China Shandong Provincial Engineering Laboratory of Agricultural Equipment Intellectualization Tai’an 271018PR China

Combining multiple crop protection Unmanned Aerial Vehicles(UAVs)as a team for a scheduled spraying mission over farmland now is a common way to significantly increase ***,given some issues such as different configurations,irregular borders,and especially varying pesticide requirements,it is more important and more complex than other multi-Agent Systems(MASs)in common *** this work,we focus on the mission arrangement of UAVs,which is the foundation of other high-level cooperations,systematically propose Efficiency-first Spraying Mission Arrangement Problem(ESMAP),and try to construct a united problem framework for the mission arrangement of crop protection ***,to characterise the differences in sub-areas,the varying pesticide requirement per unit is well considered based on Normalized Difference Vegetation Index(NDVI).firstly,the mathematical model of multiple crop-protection UAVs is established and ESMAP is ***,an acquisition method of a farmland’s NDVI map is proposed,and the calculation method of pesticide volume based on NDVI is ***,an improved Genetic Algorithm(GA)is proposed to solve ESMAP,and a comparable combination algorithm is *** simulations for algorithm analysis are carried out within MATLAB,and it is determined that the proposed GA is more efficient and accurate than the ***,a mission arrangement tested with three UAVs was carried out to validate the effectiveness of the proposed GA in spraying *** results illustrated that it performed well,which took only 90.6%of the operation time taken by the combination algorithm.

关键词： Efficiency-first optimization Mission arrangement Multi-UAVs Heterogeneous farmland

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Microfluidic-based isolation of circulating tumor cells with high-efficiency and high-purity

引用

Chinese Chemical Letters 2024年第8期35卷 101-111页

作者： feng Wu xuemin Kong Yixuan Liu Shuli Wang Zhong Chen xu Hou fujian Engineering Research Center for Solid-State Lighting Department of Electronic ScienceSchool of Electronic Science and EngineeringXiamen UniversityXiamen 361005China College of Physics and New Energy Xuzhou University of TechnologyXuzhou 221018China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China College of Physical Science and Technology Xiamen UniversityXiamen 361005China Innovation Laboratory for Sciences and Technologies of Energy Materials of fujian Province(IKKEM) Xiamen 361102China

The isolation of circulating tumor cells(CTCs)from complex biological samples is of paramount signifi-cance for advancing cancer diagnosis,prognosis,and ***,the low concentration of CTCs and nonspecific adhesion of white blood cells(WBCs)present challenges that hinder the efficiency and purity of captured ***-based strategies utilize precise fluid control at the micron level to incorporate specific micro/nanostructures or recognition molecules,enabling effective CTCs ***,by employing surface modification designs that exhibit exceptional anti-adhesion properties against WBCs,the purity of isolated CTCs can be further *** review offers an in-depth explo-ration of recent advancements,challenges,and opportunities associated with microfluidic-based CTCs iso-lation from biological ***,we will comprehensively introduce the microfluidic-based strate-gies for achieving high-efficiency CTCs isolation,which includes the morphological design of microchan-nels for physical force-based CTCs isolation and the specific modification of microchannel surfaces for affinity-based CTCs ***,a review of recent research advances in microfluidic-based high-purity CTCs isolation is presented,focusing on strategies that decrease the nonspecific adhesion of WBCs through surface micro-/nanostructure construction or chemical and biological ***,we will summarize the article by providing the prospective opportunities and challenges for the future development of microfluidic-based CTCs isolation.

关键词： Microfluidics Isolation Circulating tumor cells High-efficiency High-purity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Pre-Selection-Based Ant Colony System for Integrated Resources Scheduling Problem at Marine Container Terminal

引用

Computers, Materials & Continua 2024年第8期80卷 2363-2385页

作者： Rong Wang Xinxin xu Zijia Wang fei ji Nankun Mu School of Electronic and Information Engineering South China University of TechnologyGuangzhou510641China School of Computer Science and Technology Ocean University of ChinaQingdao266100China School of Computer Science and Cyber Engineering Guangzhou UniversityGuangzhou510006China School of Computer Science Chongqing UniversityChongqing400044China

Marine container terminal(MCT)plays a key role in the marine intelligent transportation system and international logistics ***,the efficiency of resource scheduling significantly influences the operation performance of *** solve the practical resource scheduling problem(RSP)in MCT efficiently,this paper has contributions to both the problem model and the algorithm ***,in the problem model,different from most of the existing studies that only consider scheduling part of the resources in MCT,we propose a unified mathematical model for formulating an integrated *** new integrated RSP model allocates and schedules multiple MCT resources simultaneously by taking the total cost minimization as the ***,in the algorithm design,a pre-selection-based ant colony system(PACS)approach is proposed based on graphic structure solution representation and a pre-selection *** the one hand,as the RSP can be formulated as the shortest path problem on the directed complete graph,the graphic structure is proposed to represent the solution encoding to consider multiple constraints and multiple factors of the RSP,which effectively avoids the generation of infeasible *** the other hand,the pre-selection strategy aims to reduce the computational burden of PACS and to fast obtain a higher-quality *** evaluate the performance of the proposed novel PACS in solving the new integrated RSP model,a set of test cases with different sizes is *** results and comparisons show the effectiveness and efficiency of the PACS algorithm,which can significantly outperform other state-of-the-art algorithms.

关键词： Resource scheduling problem(RSP) ant colony system(ACS) marine container terminal(MCT) pre-selection strategy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Dynamic asymmetric mechanical responsive carbon nanotube fiber for ionic logic gate

引用

Chinese Chemical Letters 2024年第6期35卷 249-253页

作者： Pei Cao Yilan Wang Lejian Yu Miao Wang Liming Zhao xu Hou State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Innovation Laboratory for Sciences and Technologies of Energy Materials of fujian Province(IKKEM) Xiamen 361005China The Higher Educational Key Laboratory for Biomedical Engineering of fujian Province Department of BiomaterialsResearch Center of Biomedical Engineering of XiamenCollege of MaterialsXiamen UniversityXiamen 361005China Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China Institute of Artificial Intelligence Xiamen UniversityXiamen 361005China Department of Physics Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional Materials ResearchJiujiang Research InstituteCollege of Physical Science and TechnologyXiamen UniversityXiamen 361005China Engineering Research Center of Electrochemical Technologies of Ministry of Education Xiamen UniversityXiamen 361005China

Inspired by biological ion channels,numerous artificial asymmetric ion channels have been synthesized to facilitate the fabrication of ionic ***,the creation of biomimetic asymmetric ion channels necessitates expensive scientific apparatus and intricate material processing procedures,which constrains its advancement within the realm of ionic *** this study,we have devised dynamic asymmetric ion channels with mechanical responsiveness by combining polymers of varying elastic modulus along the longitudinal axis of carbon nanotube fiber(CNTf).The ion rectification can be modulated via the disparate response of CNTf-based ion channels to mechanical *** have effectively employed these asymmetric ion channels with mechanical sensitivity in the design of a logic gate device,achieving logic operations such as“AND”and“OR”.The conception of these dynamic asymmetric ion channels with mechanical sensitivity offers a straightforward,cost-effective,and versatile approach for generating ion channels,highlighting their potential application in intricate,highly integrated ionic circuits.

关键词： Carbon nanotubes fibers Mechanical response Rectification effect Ionic logic gate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：