检索结果-南通市图书馆

Insight into the development of electrolytes for aqueous zinc metal batteries from alkaline to neutral

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

Chinese Chemical Letters 2024年第2期35卷 232-241页

作者： An duan Sha Luo Wei Sun School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China

Aqueous zinc metal batteries are considered as promising candidates for next-generation electrochemical energy storage devices,especially for large-scale energy storage,due to the advantages of high-safety,high energy density and low *** the bridge connecting cathode and anode,electrolyte provides a realistic operating *** alkaline and neutral aqueous zinc metal batteries,issues associated with electrolyte and anode are still *** this review,we reveal the development and evolution of electrolytes for aqueous zinc metal batteries from alkaline to neutral via the description of fundamentals and challenges in terms of comparison and *** also elaborate the strategies in electrolytes regulation and highlight the basic roles and progresses in additives engineering.

关键词： Aqueous electrolytes Zinc metal batteries pH-dependent chemistry Electrolyte regulation Additives engineering

On Hamiltonian Property of Cayley Digraphs

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2024年第2期40卷 547-556页

作者： Fang duan Qiong-xiang HUANG School of Mathematics Science Xinjiang Normal UniversityUrumqi 830017China College of Mathematics and Systems Science Xinjiang UniversityUrumqi 830017China

Let G be a finite group generated by S and C(G,S) the Cayley digraphs of G with connection set *** this paper,we give some sufficient conditions for the existence of hamiltonian circuit in C(G,S),where G=Zm×H is a semiproduct of Zmby a subgroup H of *** particular,if m is a prime,then the Cayley digraph of G has a hamiltonian circuit unless G=Zm×*** addition,we introduce a new digraph operation,called φ-semiproduct of Γ1by Γ2and denoted by Γ1×Γ_φΓ2,in terms of mapping φ:V(Γ2)→{1,-1}.Furthermore we prove that C(Zm,{a})×_φ C(H,S) is also a Cayley digraph if φ is a homomorphism from H to{1,-1} ≤ Zm~*,which produces some classes of Cayley digraphs that have hamiltonian circuits.

关键词： Cayley digraphs hamiltonian circuit external semidirect product

An approach to estimate tree height using PolInSAR data constructed by the Sentinel-1 dual-pol SAR data and RVoG model

在线全文

学校读者我要写书评

暂无评论

Journal of Electronic Science and Technology 2024年第3期22卷 69-79页

作者： Yin Zhang Ding-Feng duan School of Resources and Environment University of Electronic Science and Technology of ChinaChengdu611731China

We estimate tree heights using polarimetric interferometric synthetic aperture radar(PolInSAR)data constructed by the dual-polarization(dual-pol)SAR data and random volume over the ground(RVoG)*** the Sentinel-1 SAR dual-pol(SVV,vertically transmitted and vertically received and SVH,vertically transmitted and horizontally received)configuration,one notes that S_(HH),the horizontally transmitted and horizontally received scattering element,is *** S_(HH)data were constructed using the SVH data,and polarimetric SAR(PolSAR)data were *** proposed approach was first verified in simulation with satisfactory *** was next applied to construct PolInSAR data by a pair of dual-pol Sentinel-1A data at Duke Forest,North Carolina,*** to local observations and forest descriptions,the range of estimated tree heights was overall *** the heights with the ICESat-2 tree heights at 23 sampling locations,relative errors of 5 points were within±30%.Errors of 8 points ranged from 30%to 40%,but errors of the remaining 10 points were>40%.The results should be encouraged as error reduction is *** instance,the construction of PolSAR data should not be limited to using SVH,and a combination of SVH and SVV should be ***,an ensemble of tree heights derived from multiple PolInSAR data can be considered since tree heights do not vary much with time frame in months or one season.

关键词： Constructed polarimetric SAR data Dual polarization Sentinel-1 SAR data Polarimetric interferometric SAR Random volume over the ground model Tree height estimation

Coupled conditional nonlinear optimal perturbations and their application to ENSO ensemble forecasts

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

Science China Earth Sciences 2024年第3期67卷 826-842页

作者： Wansuo duan Lei HU Rong FENG LASG Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China

Limitations are existed in current ensemble forecasting initial perturbation methods for describing the interactions among various spheres of the Earth system. In this study, a new method is proposed, namely, the coupled conditional nonlinear optimal perturbation(C-CNOP) method, which incorporates multisphere interactions much appropriately. The El Nino-Southern Oscillation(ENSO) is a typical ocean-atmosphere “coupling”(or “interaction”) phenomenon. The C-CNOP method is applied to ensemble forecasting of ENSO. It is demonstrated that the C-CNOP method can generate coupled initial perturbations(CPs) that appropriately consider initial ocean-atmosphere coupling uncertainty for ENSO ensemble forecasts. Results reveal that the CPs effectively improve the ability of ENSO ensemble-mean forecasts in both temporal variability of Nio3.4 sea surface temperature anomalies(SSTAs) and spatial variability of ENSO mature-phase SSTAs. Notably, despite the weakest ocean-atmosphere coupling strength in the tropical Pacific occurring during the boreal spring and summer, CPs still capture the uncertainties of this weak coupling when ENSO predictions are initialized at these seasons. This performance of CPs significantly suppresses the rapid increase of ENSO prediction errors due to the high ocean-atmosphere coupling instability during these seasons, and thus effectively extends the lead time of skillful ENSO forecasting. Hence, the C-CNOP method is a suitable initial perturbation approach for ENSO ensemble forecast that can describe initial ocean-atmosphere coupling uncertainty. It is expected that the CCNOP method plays a significant role in predictions of other high-impact climate phenomena, and even future Earth system predictions.

关键词： Ensemble forecast Multisphere interaction Initial perturbations ENSO

Fixed-Time Cluster Optimization for Multi-Agent Systems Based on Piecewise Power-Law Design

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1301-1303页

作者： Suna duan Xinchun Jia Xiaobo Chi School of Mathematical Sciences Shanxi UniversityTaiyuan 030006China School of Automation and Software Engineering Shanxi UniversityTaiyuan 030013China

Dear Editor,This letter focuses on the fixed-time(FXT)cluster optimization problem of first-order multi-agent systems(FOMASs)in an undirected network,in which the optimization objective is the sum of the objective functions of all clusters.A novel piecewise power-law control protocol with cooperative-competition relations is ***,a sufficient condition is obtained to ensure that the FOMASs achieve the cluster consensus within an FXT.

关键词： agent cluster optimization

在线全文

学校读者我要写书评

暂无评论

“白蛇传”德语译介史述

国际汉学 2024年第1期 55-62,151,152页

作者：段亚男上海外国语大学德语系

纵观“白蛇传”在德语世界近两百年的译介与传播史脉,经历由浅入深,再入简的嬗变之路,不仅对中德文学交流意义深远,甚而成为早期西方世界认识中国的重要媒介。诸般译作彰显出鲜明的时代烙印,喻示着不同历史阶段德语世界的汉学研究侧重... 详细信息

纵观“白蛇传”在德语世界近两百年的译介与传播史脉,经历由浅入深,再入简的嬗变之路,不仅对中德文学交流意义深远,甚而成为早期西方世界认识中国的重要媒介。诸般译作彰显出鲜明的时代烙印,喻示着不同历史阶段德语世界的汉学研究侧重与审美倾向。本文系统梳理“白蛇传”在德语世界的译介脉络,阐明各时期“白蛇传”故事的译本形态与译者动机,钩沉其在德语世界的知识谱系与接受效果,以期引发对中国故事域外有效传播的深切思考。

关键词：白蛇传德译本中国故事德国汉学

猫尾草种带真菌多样性及其对种子萌发和幼苗生长的影响

在线全文

学校读者我要写书评

暂无评论

草业学报 2024年第10期33卷 108-122页

作者：申琴郑荣春南志标段廷玉兰州大学草种创新与草地农业生态系统全国重点实验室兰州大学草地农业科技学院甘肃兰州730020

猫尾草是一种多年生丛生型禾本科牧草,其优质高产且有良好的饲用价值,是我国甘肃省岷县重要的牧草和牧民收入来源,但是目前尚缺少对猫尾草种带真菌多样性及其致病性的研究。结合室内分离培养法与高通量测序法对猫尾草的种带真菌多样性... 详细信息

猫尾草是一种多年生丛生型禾本科牧草,其优质高产且有良好的饲用价值,是我国甘肃省岷县重要的牧草和牧民收入来源,但是目前尚缺少对猫尾草种带真菌多样性及其致病性的研究。结合室内分离培养法与高通量测序法对猫尾草的种带真菌多样性及其致病性进行了研究,主要结果如下:自3个供试猫尾草品种中共培养分离出9属13种真菌,分离率前5的真菌为链格孢、燕麦镰孢、伞状毛霉、黑附球菌和谢瓦氏曲霉。高通量测序法从3个猫尾草品种中分离获得2门27属。主要为子囊菌门和担子菌门真菌,由链格孢属、曲霉属、暗球腔菌属、镰刀菌属等组成,品种间α和β多样性差异显著。其中分离培养的8种种带真菌均显著降低了猫尾草种子的发芽率(9.78%~30.67%)和发芽势(10.69%~32.08%)(P<0.05);假青光曲霉处理后,猫尾草种子发芽率最低;链格孢和假青光曲霉显著增加了岷山猫尾草种子的发霉率。研究结果为猫尾草的利用及种传病害的预防提供了理论依据。

关键词：猫尾草种带真菌多样性致病性

High-throughput screening of single-atom catalysts confined in monolayer black phosphorus for efficient nitrogen reduction reaction

在线全文

学校读者我要写书评

暂无评论

nano Research 2024年第4期17卷 2360-2367页

作者： Xiao-Yan Li Manyi duan Pengfei Ou Department of Electrical and Computer Engineering University of TorontoTorontoOntario M5S 1A4Canada School of Physics and Electronic Engineering Sichuan Normal UniversityChengdu 610101China Department of Chemistry Northwestern UniversityEvanstonIL 60208USA

The discovery of metal-nitrogen centers as the active sites for electrolysis has aroused significant interest in utilizing single-atom catalysts for nitrogen reduction reaction(NRR).Properly designed nanostructured catalysts that strongly interact with nitrogen molecules(N_(2))can promote adsorption and activation,thereby resulting in efficient catalysts with high stability,activity,and *** this study,using density functional theory calculations,we selected monolayer black phosphorus(BP)as the substrate and screened a series of single-atom transition metals confined in tri-coordinated and tetra-coordinated active centers(without and with N dopants)to electro-catalyze *** a result,we have identified two promising candidates(Hf_(1)-N_(1)P_(2)-1 and Tc_(1)-N_(4)),which exhibit not only low overpotentials of 0.56 and 0.49 V but also high thermodynamic and electrochemical stability,as well as good selectivity towards NRR over the competing hydrogen evolution *** also demonstrate the ability of Hf_(1)-N_(1)P_(2)-1 and Tc_(1)-N_(4) to activate and hydrogenate N_(2) by donating electrons and regulating charge *** study not only predicts new BP-based promising catalysts but also provides guidance for the rational design of high-performance NRR electrocatalysts under ambient conditions.

关键词： N_(2) electroreduction reaction single-atom catalysts black phosphorus density functional theory high-throughput calculations

新媒体环境下大学生思想政治教育网络路径探究

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

江西电力职业技术学院学报 2024年第1期37卷 121-123页

作者：段楠运城职业技术大学山西运城044000

针对新媒体环境下大学生思想政治教育网络路径展开了探究。首先,分析了大学生思想政治教育现状,包括安全意识相对薄弱、信息筛选能力不足、价值观念多元化。其次,提出了新媒体环境下大学生思想政治网络教育的发展契机,包括增强互动性和... 详细信息

针对新媒体环境下大学生思想政治教育网络路径展开了探究。首先,分析了大学生思想政治教育现状,包括安全意识相对薄弱、信息筛选能力不足、价值观念多元化。其次,提出了新媒体环境下大学生思想政治网络教育的发展契机,包括增强互动性和参与感、多样化的表达方式、精准化和个性化教育。最后,探讨了新媒体环境下大学生思想政治教育网络路径。

关键词：新媒体大学生思政教育网络思政教育