检索结果-南通市图书馆

Journal of Energy Chemistry 2024年第5期92卷 216-223页

作者： Xuexiu Gu Xuan-Wen Gao Dongrun Yang Qinfen Gu YSong hong Chen Tianzhen ren Wen-Bin Luo Institute for Energy Electrochemistry and Urban Mines Metallurgy School of MetallurgyNortheastern UniversityShenyang 110819LiaoningChina Australian Synchrotron(ANSTO) 800 Blackburn RdClaytonVictoria 3168Australia School of Science and Engineering University of DundeeNethergateDundee DD14HNScotlandUK

As the primary suppliers of cyclable sodium ions,O3-type layer-structured manganese-based oxides are recognized as highly competitive cathode candidates for sodium-ion *** advance the development of high-energy sodium-ion batteries,it is crucial to explore cathode materials operating at high voltages while maintaining a stable cycling *** orbital and electronic structure of the octahedral center metal element plays a crucial role in maintaining the octahedra structural integrity and improving Na^(+)ion diffusion by introducing heterogeneous chemical *** by the abundant configuration of extra nuclear electrons and large ion radius,we employed trace amounts of tungsten in this *** obtained cathode material can promote the reversibility of oxygen redox reactions in the high-voltage region and inhibit the loss of lattice ***,the formation of a Na_(2)WO_(4) coating on the material surface can improve the interfacial stability and interface ions *** demonstrates an initial Coulombic efficiency(ICE)of 94.6%along with 168.5 mA h g^(-1 )discharge capacity within the voltage range of 1.9-4.35 *** findings contribute to the advancement of high-energy sodium-ion batteries by providing insights into the benefits of tungsten doping and Na_(2)WO_(4) coating on cathode materials.

关键词： Sodium ion battery Layer-structured manganese-based oxides Cathodematerial Surface modification Elements doping

In vivo haploid induction in cauliflower,kale,and broccoli

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2024年第9期66卷 1823-1826页

作者： Guixiang Wang mei Zong Shuo Han hong Zhao Mengmeng Duan Xin Liu Ning Guo Fan Liu State Key Laboratory of Vegetable Biobreeding Beijing Key Laboratory of Vegetable Germplasm ImprovementBeijing Vegetable Research CenterBeijing Academy of Agriculture and Forestry SciencesBeijing100097China

Brassica oleracea (family Brassicaceae) represents a group of economically valuable vegetables cultivated worldwide,including cabbage (var. capitata), cauliflower (var. botrytis),broccoli (var. italica), and kale (var. acephala). These crops are typically self-incompatible and require vernalization for flowering, thereby contributing to their long growth cycles.

关键词： breeding crops thereby

Maternal weight and its association with risk of overweight in offspring:a trajectory analysis from a birth cohort in China

在线全文

学校读者我要写书评

暂无评论

World Journal of Pediatrics 2024年第5期20卷 496-505页

作者： Rui Deng Wei-Qin Li Xing-Xiu Li Liu-mei Wei Jie Hu Jun-hong Leng Bin Dong Institute of Child and Adolescent Health School of Public HealthPeking University Health Science CenterNo.38 Xueyuan RdHaidian DistrictBeijing100191China Tianjin Women and Children’s Health Center No.96 Guizhou RdHeping DistrictTianjin300070China Menzies Health Institute Queensland Griffith UniversityNathanQLD4111Australia

Background Most studies on the association of maternal pregnancy weight with offspring weight trajectory have a short follow-up *** study aimed to explore the associations of maternal prepregnancy body mass index(BMI)and gestational weight gain(GWG)with childhood weight trajectories in a 7-year birth *** A total of 946 mother–child pairs(467 boys and 479 girls)from a longitudinal birth cohort in Tianjin City,China,were included in this study,ranging from pregnancy to offspring at 7 *** outcome variable was defined as overweight or not overweight in offspring at the last round.A group-based trajectory model was applied to identify childhood BMI trajectory *** Five discrete BMI trajectory groups were identified and characterized as constant underweight(25.2%),constant normal weight(42.8%),and high or increasing trajectory[at risk of overweight(16.9%),progressive overweight(11.0%)and progressive obesity(4.1%)].Maternal prepregnancy overweight was associated with 1.72(95%CI 1.14–2.60,P=0.01)to 4.02(95%CI 1.94–8.36,Pren in all high or increasing trajectory groups were associated with greater overweight risk at the last round[risk ratios(RRs)ranged from 3.54(95%CI 2.53–4.95,P<0.001)to 6.18(95%CI 4.05–9.42,P<0.001)].Conclusion Maternal prepregnancy overweight and excessive gestational weight gain were associated with increasing or high-level childhood body mass index trajectories as well as a greater risk of overweight at 7 years.

关键词： Body-weight trajectory Child Gestational weight gain Overweight Pregnancy

Applications of deep learning for detecting ophthalmic diseases with ultrawide-field fundus

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

International Journal of Ophthalmology(English edition) 2024年第1期17卷 188-200页

作者： Qing-Qing Tang Xiang-Gang Yang hong-Qiu Wang Da-Wen Wu mei-Xia Zhang Department of Ophthalmology and Research Laboratory of Macular Disease West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina hong Kong University of Science and Technology(Guangzhou) Guangzhou 511400Guangdong ProvinceChina

AIM:To summarize the application of deep learning in detecting ophthalmic disease with ultrawide-field fundus images and analyze the advantages,limitations,and possible solutions common to all ***:We searched three academic databases,including PubMed,Web of Science,and Ovid,with the date of August *** matched and screened according to the target keywords and publication year and retrieved a total of 4358 research papers according to the keywords,of which 23 studies were retrieved on applying deep learning in diagnosing ophthalmic disease with ultrawide-field ***:Deep learning in ultrawide-field images can detect various ophthalmic diseases and achieve great performance,including diabetic retinopathy,glaucoma,age-related macular degeneration,retinal vein occlusions,retinal detachment,and other peripheral retinal *** to fundus images,the ultrawide-field fundus scanning laser ophthalmoscopy enables the capture of the ocular fundus up to 200°in a single exposure,which can observe more areas of the ***:The combination of ultrawide-field fundus images and artificial intelligence will achieve great performance in diagnosing multiple ophthalmic diseases in the future.

关键词： ultrawide-field fundus images deep learning disease diagnosis ophthalmic disease

胎儿染色体异常与不同先天性心脏病的关系研究

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

四川大学学报（医学版） 2010年第2期41卷 312-315,323页

作者：张璘张晓红任梅宏宋桂宁北京大学人民医院产前诊断中心北京100044

目的通过分析产前诊断中确诊的染色体异常并伴有先天性心脏病畸形患儿相关资料,总结心脏畸形不同分类和染色体异常的关系及比率,为探讨先天性心脏病病因、提高先天性心脏病产前诊断率提供理论依据。方法回顾性分析2006年1月至2009年12... 详细信息

目的通过分析产前诊断中确诊的染色体异常并伴有先天性心脏病畸形患儿相关资料,总结心脏畸形不同分类和染色体异常的关系及比率,为探讨先天性心脏病病因、提高先天性心脏病产前诊断率提供理论依据。方法回顾性分析2006年1月至2009年12月间北京大学人民医院产前诊断中心确诊的染色体异常并伴有先天性心脏畸形病例资料,综合分析先天性心脏病畸形分类和染色体异常的关系及比率。结果49例染色体异常伴先天性心脏畸形患儿中,21-三体11例,18-三体6例,13-三体6例,14-三体1例,16-三体3例,8-三体1例,22-三体1例,46,XY/XX,5p-2例,易位型部分三体8例,性染色体异常8例,三倍体2例。相同的染色体异常可伴有不同的心脏畸形及心外畸形,同样的心脏畸形可存在不同的染色体异常。结论染色体异常可伴有众多基因的增加或减少,可同时伴有多种心脏或心外畸形,不同染色体异常伴发心脏畸形的类型及比率也各不同。超声提示胎儿心脏畸形者,应进一步行产前细胞遗传学诊断以排除染色体异常,避免染色体异常综合征患儿出生。

关键词：先天性心脏病染色体异常产前诊断羊水穿刺脐带血穿刺

A FAS approach for stabilization of generalized chained forms: part 1. Discontinuous control laws

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第2期67卷 118-143页

作者： Guang-ren DUAN Center for Control Theory and Guidance Technology Harbin Institute of Technology Center for Control Science and Technology Southern University of Science and Technology

In this paper, a type of general nonholonomic systems is proposed, which contains both the Brockett’s two example systems, and their extended n-dimensional chained forms, as special cases. For the stabilization of such systems, a stabilizing controller is proposed based on the fully actuated system(FAS)approach, which is discontinuous at the origin but time-invariant when the open-loop system is time-invariant,and drives the feasible trajectories of the system to the origin exponentially. Furthermore, the proposed FAS approach is also extended to the sub-normal system case and the time-delay system case.

关键词： nonholonomic systems feedback stabilization exponential convergence sub-fully actuated systems time-delay systems

Regulating ion transport behaviors toward dendrite-free potassium metal batteries:recent advances and perspectives

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第4期43卷 1435-1460页

作者： Lu-Kang Zhao Xuan-Wen Gao Tian-Zhen ren Da Wang Da-Wei Wang Zhao-Meng Liu hong Chen Wen-Bin Luo School of Metallurgy Northeastern UniversityShenyang110819China School of Chemical Engineering The University of New South WalesSydneyNSW2052Australia

With abundant potassium resources and high capacity,potassium metal batteries(PMBs)present a compelling option for the next generation of energy storage ***,PMBs suffer from an unstable anode interface caused by uncontrolled dendrite growth,which results in unsatisfactory cyclability and safety *** investigations suggest that significant progress has been made in enhancing the interfacial stability of *** various effective strategies for stabilizing interfaces can ultimately be attributed to the regulation of the sluggish ion transfer kinetics and irregular deposition,i.e.,the arrangement of ion transport behaviors at the *** modulation of ions transport rate and ions deposition directions makes it possible to obtain a dendrite-free and smooth deposition ***,the influencing factors and action mechanism of K^(+)interface transport behaviors are discussed to understand the nature of material design for constructing stable anode interfaces,including regulating the solvation and desolvation structures,accelerating K^(+)transport kinetics and controlling K^(+)deposition *** addition,the deficiencies and prospects of the research on electrolyte,separators and designed electrode involved in the manufacturing and testing and ion transport process of PMBs are *** review is expected to provide some possible directions for constructing dendrite-free interfaces in advanced PMBs-related research and offer significant insights for prospective experimental research and commercial applications.

关键词： Ion transport rate Ion transport direction Interface Potassium metal batteries Dendrites growth

A FAS approach for stabilization of generalized chained forms: part 2. Continuous control laws

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第3期67卷 114-135页

作者： Guang-ren DUAN Center for Control Theory and Guidance Technology Harbin Institute of Technology Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and Technology

In this paper, continuous time-varying stabilizing controllers for the type of general nonholonomic systems proposed and treated in part 1 are designed using the fully actuated system(FAS) approach. The key step is to differentiate the first scalar equation, and by control of the obtained second-order scalar system, a proportional plus integral feedback form for the first control variable is obtained. With the solution to this designed second-order scalar system, the rest equations in the nonholonomic system form an independent time-varying subsystem which is then handled by the FAS approach. The overall designed controller contains an almost arbitrarily chosen design parameter, and is proven to guarantee the uniformly and globally exponential stability of the closed-loop system. The proposed approach is simple and effective,and is demonstrated with a practical example of ship control.

关键词： nonholonomic systems feedback stabilization fully actuated systems Lyapunov stability continuous controllers

Study on carbon emission calculation method and carbon reduction indexes of urban building stock

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第9期67卷 2706-2726页

作者： YANG Liu ZHANG Nan LU mei LUO ZhiXing DOU mei State Key Laboratory of Green Building Xi’an University of Architecture and TechnologyXi’an 710055China School of Architecture Xi’an University of Architecture and TechnologyXi’an 710055China School of Language Literature and LawXi’an University of Architecture and TechnologyXi’an 710055China School of Management Xi’an University of Architecture and TechnologyXi’an 710055China China Southwest Architectural Design and Research Institute Corp.Ltd. Chengdu 610041China

Carbon emissions associated with buildings are a major source of urban emissions. To put forward the methods and strategies to curb carbon emissions from urban building stock, it is not only necessary to establish a carbon emission calculation method for fine statistical analysis, but also to evaluate carbon emissions of urban planning schemes with applicable indexes. Currently,researches mainly focus on carbon emissions of individual buildings. When expanded to urban building stock, the calculation faces the lack of basic data, inadequate spatial analysis and unspecific carbon reduction indexes. Therefore, this study proposes a bottom-up calculation method for urban building stock, conducts spatial analysis based on carbon balance of urban grids, reveals the coupling mechanism between urban carbon reduction indexes and grid carbon emissions, and systematically establishes a carbon-reduction-oriented urban planning method that comprises calculation, analysis and evaluation, which is applied to Xi'an,China. This study provides a theoretical reference for cities to formulate carbon reduction targets and implement planning strategies by evaluating and predicting carbon emissions from urban building stock.

关键词： carbon emissions urban building stock calculation method carbon reduction index

Correlative factors of poor prognosis and abnormal cellular immune function in patients with Alzheimer’s disease

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2024年第6期12卷 1063-1075页

作者： Hua Bai hong-mei Zeng Qi-Fang Zhang Yue-Zhi Hu Fei-Fei Deng Department of Neurology The Third Affiliated Hospital of Guizhou Medical University in ChinaDuyun 558099Guizhou ProvinceChina Department of Neurology Guizhou Medical UniversityDuyun 558099Guizhou ProvinceChina Key Laboratory of Medical Molecular Biology Guizhou Medical UniversityGuiyang 550004Guizhou ProvinceChina

BACKGROUND Alzheimer’s disease(AD)is a serious disease causing human dementia and social *** quality of life and prognosis of AD patients have attracted much *** role of chronic immune inflammation in the pathogenesis of AD is becoming more and more *** To study the relationship among cognitive dysfunction,abnormal cellular immune function,neuroimaging results and poor prognostic factors in *** A retrospective analysis of 62 hospitalized patients clinical diagnosed with AD who were admitted to our hospital from November 2015 to November *** cognitive dysfunction performance characteristics,laboratory test data and neuroimaging data from medical records within 24 h of admission,including Mini Mental State Examination Scale score,drawing clock test,blood T lymphocyte subsets,and neutrophils and lymphocyte ratio(NLR),disturbance of consciousness,extrapyramidal symptoms,electroencephalogram(EEG)and head nucleus magnetic spectroscopy(MRS)and other *** logistic regression analysis was used to determine independent prog-nostic *** modified Rankin scale(mRS)was used to determine whether the prognosis was *** correlation between drug treatment and prognostic mRS score was tested by the rank sum *** Univariate analysis showed that abnormal cellular immune function,extrapyramidal symptoms,obvious disturbance of consciousness,abnormal EEG,increased NLR,abnormal MRS,and complicated pneumonia were related to the poor prognosis of AD *** logistic regression analysis showed that the decrease in the proportion of T lym-phocytes in the blood after abnormal cellular immune function(odd ratio:2.078,95%confidence interval:1.156-3.986,P<0.05)was an independent risk factor for predicting the poor prognosis of *** number of days of donepezil treatment to improve cognitive function was negatively correlated with mRS score(r=0.578,P<0.05).CONCLUSION The decrease in the proportion of T

关键词： Alzheimer’s disease Cellular immunity Prognosis T lymphocytes Magnetic resonance spectroscopy