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Application of Multiple Examination Methods in Teaching Japanese Major — — A Case Study of Basic Japanese in Guizhou University of Finance and Economics
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作者 YUAN Xianting 《外文科技期刊数据库(文摘版)教育科学》 2020年第2期008-010,共5页
The Basic Japanese of Japanese major in Guizhou University of Finance and Economics is designed according to the teaching requirements of the national standard of Japanese major from the teaching method to the examina... The Basic Japanese of Japanese major in Guizhou University of Finance and Economics is designed according to the teaching requirements of the national standard of Japanese major from the teaching method to the examination method. It is ability-oriented and attaches importance to the cultivation of students' language ability, speculative and innovative ability, cross-cultural communication ability, autonomous learning ability and practical ability. The teaching contents and assessment methods of Basic Japanese conform to the natural rules of foreign language acquisition and attach importance to the cultivation of students' cognitive ability. In the whole teaching and examination process, students are the center, teachers play a guiding role. It is of great significance to explore the application of various examination methods in Japanese teaching for improving the quality of Japanese teaching. 展开更多
关键词 assessment method CENTER GUIDANCE
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Deformations and extensions of modified λ-differential Lie-Yamaguti algebras
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作者 TENG Wen PAN Yuewei 《中山大学学报(自然科学版)(中英文)》 北大核心 2025年第4期115-127,共13页
The modifiedλ-differential Lie-Yamaguti algebras are considered,in which a modifiedλ-differential Lie-Yamaguti algebra consisting of a Lie-Yamaguti algebra and a modifiedλ-differential operator.First we introduce t... The modifiedλ-differential Lie-Yamaguti algebras are considered,in which a modifiedλ-differential Lie-Yamaguti algebra consisting of a Lie-Yamaguti algebra and a modifiedλ-differential operator.First we introduce the representation of modifiedλ-differential Lie-Yamaguti algebras.Furthermore,we establish the cohomology of a modifiedλ-differential Lie-Yamaguti algebra with coefficients in a representation.Finally,we investigate the one-parameter formal deformations and Abelian extensions of modifiedλ-differential Lie-Yamaguti algebras using the second cohomology group. 展开更多
关键词 Lie-Yamaguti algebra modifiedλ-differential operator representation and cohomology one-parameter formal deformation Abelian extension
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Impact of country-of-origin image of Guizhou province on brand trust of green agricultural products 被引量:1
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作者 LIU Liang-can LIU Shi-zeng 《Ecological Economy》 2019年第1期19-28,共10页
Brand building of agricultural products is the key for agricultural enterprises to gain competitive advantage and occupy the market. Guizhou province is rich in green agricultural products resources and has superior n... Brand building of agricultural products is the key for agricultural enterprises to gain competitive advantage and occupy the market. Guizhou province is rich in green agricultural products resources and has superior natural resources, but it is at a disadvantage in the market competition. The constraint factor is that the brand is not enough to obtain consumer trust. In order to provide countermeasures and suggestions for Guizhou provincial government and agricultural enterprises to shape green agricultural products brand, this paper explores the influence path of country-of-origin image of Guizhou province on brand trust of green agricultural products. Therefore, based on the theory of Country-of-origin effects this study conducts an empirical research. Taking the country-of-origin image, including natural conditions,technological conditions, brand supervision norms, technology input, government marketing promotion and government policies as antecedent variables, and green agricultural brand trust, including brand competence trust and brand quality trust as dependent variables, the structural equation model was constructed. Through data collection and empirical analysis by using structural equation model, this study found that natural conditions have a positive impact on brand competence trust, and technical conditions have a positive impact on brand quality trust. The brand supervision norms, technology input, government marketing promotion and government policy will all promote consumers to have a positive impact on brand trust in green agricultural products. 展开更多
关键词 country-of-origin image brand trust green agricultural products Guizhou province
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Extensions and Deformations of 3-Lie Algebras with Higher Derivations
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作者 Shuangjian GUO 《Journal of Mathematical Research with Applications》 2025年第1期20-32,共13页
In this paper,we call a tuple consisting of 3-Lie algebra and a higher derivation on it a 3-LieHDer pair.We introduce a cohomology theory of 3-LieHDer pairs.Next,we interpret the second cohomology group as the space o... In this paper,we call a tuple consisting of 3-Lie algebra and a higher derivation on it a 3-LieHDer pair.We introduce a cohomology theory of 3-LieHDer pairs.Next,we interpret the second cohomology group as the space of all isomorphism classes of abelian extensions.Finally,we consider formal deformations of 3-LieHDer pairs that are governed by the cohomology with self-coefficient. 展开更多
关键词 higher derivations 3-LieHDer pairs COHOMOLOGY EXTENSIONS formal deformations
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Accuracy and Consistency of the Explicit-Invariant Energy Quadratization Approach for the Cahn-Hilliard Equation
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作者 Jun ZHANG Fangying SONG Yu ZHANG 《Journal of Mathematical Research with Applications》 2025年第1期84-104,共21页
It is well known that the explicit-invariant energy quadratization(EIEQ)approach can generate fully decoupled,linear and unconditionally energy-stable numerical schemes,so it is favored by many researchers.However,the... It is well known that the explicit-invariant energy quadratization(EIEQ)approach can generate fully decoupled,linear and unconditionally energy-stable numerical schemes,so it is favored by many researchers.However,the undeniable fact is that the numerical method obtained by EIEQ approach preserves the“modified”energy law instead of the original energy.This is mainly due to the introduction of some auxiliary variables in EIEQ scheme,and the truncation error will make the auxiliary variables deviate from the original definition in the process of numerical calculation.The primary objective of this paper is to address this gap by providing the accuracy and consistency of the EIEQ method in the context of the CahnHilliard equation.We introduce a relaxation technique for auxiliary variables and construct two numerical schemes based on EIEQ.The analysis results show that the newly constructed schemes are not only unconditionally energy stable,linear and fully decoupled,but also can effectively correct the errors introduced by auxiliary variables and follow the original energy law.Finally,several 2D and 3D numerical examples illustrate the accuracy and efficiency of the newly constructed numerical schemes. 展开更多
关键词 Cahn-Hilliard equation EIEQ unconditionally energy stable fully decoupled Relaxation technique
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Application of AI and Digital Twin Technology in Practical Teaching of Geological Hazard Courses:Taking Earthquake Disaster as an Example
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作者 Zhiquan Yang Yaping Gong +4 位作者 Henglin Liu Tingting Guo Qiuxia Yang Gen Li Qizhong Wang 《Journal of Contemporary Educational Research》 2025年第11期336-343,共8页
In response to the three major contradictions,safety,cognition,and ability cultivation,existing in the practical teaching of geological hazard courses,this paper proposes a“virtual-real integration”teaching reform s... In response to the three major contradictions,safety,cognition,and ability cultivation,existing in the practical teaching of geological hazard courses,this paper proposes a“virtual-real integration”teaching reform scheme,using earthquake disasters as an example.By integrating digital twin technology and artificial intelligence technology,a four-layer teaching framework consisting of data layer,model layer,platform layer,and intelligent layer is constructed.Progressive teaching segments of“cognition-simulation-decision-making”are designed to establish a comprehensive training path from seismic geological survey to disaster early warning and decision-making.This scheme shifts the traditional field practice venue to a safe virtual environment,promotes students’understanding of geological hazards from static fragments to dynamic processes,enhances their comprehensive decision-making ability in geological disaster prevention and mitigation,and provides theoretical support and practical guidance for cultivating interdisciplinary talents in geological hazard prevention. 展开更多
关键词 Virtual-real integration Digital twin Artificial intelligence Practical teaching Earthquake disaster
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Application of Resource Orchestration Theory in the Research of AI and HI to Achieve Value Creation
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作者 Ni Ran 《Journal of Electronic Research and Application》 2025年第2期7-11,共5页
This paper grasps the research theme of artificial intelligence(AI)and human intelligence(HI)synergy to create value,and analyzes the development status of AI and HI in the current context of digital intelligence,as w... This paper grasps the research theme of artificial intelligence(AI)and human intelligence(HI)synergy to create value,and analyzes the development status of AI and HI in the current context of digital intelligence,as well as the significance of their synergy to empower value creation.At the same time,the theory of resource arrangement is introduced,and the connotation and composition of the theory are summarized,as well as the development in the field of research and application.This paper focuses on revealing the intrinsic relationship between resource orchestration theory and AI and HI collaborative work,aiming to fully explore the potential of resource orchestration theory in the collaborative innovation of AI and HI,and put forward practical suggestions based on this. 展开更多
关键词 Resource arrangement theory Artificial intelligence(AI)and human intelligence(HI)synergy Value creation
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Non-Abelian Extensions of Rota-Baxter Pre-Lie Algebras and Wells Exact Sequences
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作者 Shuangjian GUO Qun WANG 《Journal of Mathematical Research with Applications》 2025年第4期473-487,共15页
In this paper,we introduce non-abelian cohomology groups and classify the nonabelian extensions of Rota-Baxter pre-Lie algebras in terms of non-abelian cohomology groups.Next,we explore the inducibility of pairs of au... In this paper,we introduce non-abelian cohomology groups and classify the nonabelian extensions of Rota-Baxter pre-Lie algebras in terms of non-abelian cohomology groups.Next,we explore the inducibility of pairs of automorphisms and derive the analog Wells exact sequences under the circumstance of Rota-Baxter pre-Lie algebras.Finally,we discuss the inducibility problem of pairs of automorphisms about an abelian extensions of Rota-Baxter pre-Lie algebras. 展开更多
关键词 Rota-Baxter pre-Lie algebra non-abelian extension Wells exact sequences
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Ecological Dynamics of a Logistic Population Model with Impulsive Age-selective Harvesting
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作者 DAI Xiangjun JIAO Jianjun 《应用数学》 北大核心 2026年第1期72-79,共8页
In this paper,we establish and study a single-species logistic model with impulsive age-selective harvesting.First,we prove the ultimate boundedness of the solutions of the system.Then,we obtain conditions for the asy... In this paper,we establish and study a single-species logistic model with impulsive age-selective harvesting.First,we prove the ultimate boundedness of the solutions of the system.Then,we obtain conditions for the asymptotic stability of the trivial solution and the positive periodic solution.Finally,numerical simulations are presented to validate our results.Our results show that age-selective harvesting is more conducive to sustainable population survival than non-age-selective harvesting. 展开更多
关键词 The logistic population model Selective harvesting Asymptotic stability EXTINCTION
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Spatial Distribution Characteristics and Influencing Factors of Traditional Villages in Guizhou Province
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作者 ZHANG Yihong MIN Tingdong +1 位作者 BAI Bin YANG Qing 《Journal of Landscape Research》 2022年第1期37-46,共10页
Traditional villages have high historical,cultural,scientific,artistic,social and economic value.They reflect the harmony and balance among long-term production,human life and natural environment.They are a community ... Traditional villages have high historical,cultural,scientific,artistic,social and economic value.They reflect the harmony and balance among long-term production,human life and natural environment.They are a community of tangible and intangible cultural heritages,and have received extensive attention from political circles,academic circles and the public.Through the Arc GIS10.3 geographic information system,724 traditional villages in Guizhou Province,China are visualized,and the nearest neighbor index,geographic concentration index,imbalance index,kernel density estimation and other methods are employed to analyze the spatial distribution type,distribution balance,spatial agglomeration characteristics and influencing factors.Studies have shown that the traditional villages in Guizhou Province tend to be concentrated and distributed,spatially forming high-density areas in southeastern Guizhou,second high-density areas in Anshun,moderate-density areas in Tongren,and low-density areas in Zunyi.From the city (prefecture) scale,traditional villages in Guizhou Province are relatively concentrated in Qiandongnan Prefecture,Tongren City,Anshun City and Qiannan Prefecture.From a regional perspective,the distribution of traditional villages in Guizhou Province is uneven,mainly distributed in Qiannan,Qiandong and Qianzhong.Their spatial distribution is affected by factors such as natural environment,traffic accessibility,ethnic culture,and economic development.It reveals the spatial distribution characteristics and influencing factors of traditional villages in Guizhou Province,and provides relevant realistic and theoretical foundations for the protection,inheritance and innovative development of traditional villages.In addition,the formation mechanism of traditional villages needs to be further analyzed based on information reflecting the attributes of traditional villages such as village history,village types,site selection patterns,characteristic buildings,production and life.It is also necessary to improve the traditional village database and grading evaluation system,and formulate protection and development plans,to realize the activation and utilization of traditional village resources,and promote their renewal and modernization. 展开更多
关键词 Traditional villages Geographic information system Spatial distribution Influencing factors
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Follow-up industry development of area converting degraded farmland into forest: A case study of Guizhou Province
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作者 WANG Wu-lin 《Ecological Economy》 2015年第3期251-261,共11页
The farmland to forest project has a signifi cant promoting role on ecological civilization; the follow-up industry development is the key to consolidating achievements of the farmland to forest project. Using the sur... The farmland to forest project has a signifi cant promoting role on ecological civilization; the follow-up industry development is the key to consolidating achievements of the farmland to forest project. Using the survey data of farmland farmers, this article analyzes the status and development of the followup industry in Guizhou province. The results show that the follow-up industry development quality is low, the follow-up industry development willingness is weak, the follow-up industry development ability is poor, and the follow-up industry sustained development is insuffi cient. Further analysis indicates that the follow-up industry development lack of funds, technical and system of policy support. Policy implications are discussed focusing on improving policy system, the follow-up industry development strategy, the follow-up industry development planning, and development with the combination of development strategy of Guizhou province. 展开更多
关键词 CONVERTING degraded FARMLAND into FOREST FOLLOW-UP
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Research on Japanese Majors' Thesis Writing in Finance and Economics Universities
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作者 YUAN Xianting 《外文科技期刊数据库(文摘版)教育科学》 2021年第1期032-036,共5页
Undergraduate thesis is not only an important indicator to test students' academic and academic level, but also an important indicator to measure whether students have the undergraduate qualification. This paper d... Undergraduate thesis is not only an important indicator to test students' academic and academic level, but also an important indicator to measure whether students have the undergraduate qualification. This paper discusses several problems in the graduation thesis of Japanese major in finance and economics university and puts forward some solutions, so as to help teachers and students in writing Japanese graduation thesis of finance and economics university and improve the writing quality of undergraduate thesis. 展开更多
关键词 JAPANESE graduation thesis PROBLEMS SOLUTIONS
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Industrial Carbon Emission Distribution and Regional Joint Emission Reduction:A Case Study of Cities in the Pearl River Basin,China 被引量:5
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作者 JIANG Hongtao YIN Jian +4 位作者 ZHANG Bin WEI Danqi LUO Xinyuan DING Yi XIA Ruici 《Chinese Geographical Science》 SCIE CSCD 2024年第2期210-229,共20页
China’s low-carbon development path will make significant contributions to achieving global sustainable development goals.Due to the diverse natural and economic conditions across different regions in China,there exi... China’s low-carbon development path will make significant contributions to achieving global sustainable development goals.Due to the diverse natural and economic conditions across different regions in China,there exists an imbalance in the distribution of car-bon emissions.Therefore,regional cooperation serves as an effective means to attain low-carbon development.This study examined the pattern of carbon emissions and proposed a potential joint emission reduction strategy by utilizing the industrial carbon emission intens-ity(ICEI)as a crucial factor.We utilized social network analysis and Local Indicators of Spatial Association(LISA)space-time trans-ition matrix to investigate the spatiotemporal connections and discrepancies of ICEI in the cities of the Pearl River Basin(PRB),China from 2010 to 2020.The primary drivers of the ICEI were determined through geographical detectors and multi-scale geographically weighted regression.The results were as follows:1)the overall ICEI in the Pearl River Basin is showing a downward trend,and there is a significant spatial imbalance.2)There are numerous network connections between cities regarding the ICEI,but the network structure is relatively fragile and unstable.3)Economically developed cities such as Guangzhou,Foshan,and Dongguan are in the center of the network while playing an intermediary role.4)Energy consumption,industrialization,per capita GDP,urbanization,science and techno-logy,and productivity are found to be the most influential variables in the spatial differentiation of ICEI,and their combination in-creased the explanatory power of the geographic variation of ICEI.Finally,through the analysis of differences and connections in urban carbon emissions under different economic levels and ICEI,the study suggests joint carbon reduction strategies,which are centered on carbon transfer,financial support,and technological assistance among cities. 展开更多
关键词 industrial carbon emission intensity carbon emission social network analysis Location Indicators of Spatial Association(LISA) geographical detector multi-scale geographically weighted regression Pearl River Basin(PRB) China
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Understanding the hydrogen evolution reaction activity of doped single-atom catalysts on two-dimensional GaPS_(4) by DFT and machine learning 被引量:3
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作者 Tianyun Liu Xin Zhao +5 位作者 Xuefei Liu Wenjun Xiao Zijiang Luo Wentao Wang Yuefei Zhang Jin-Cheng Liu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第6期93-100,I0004,共9页
As a zero-carbon fuel,hydrogen can be produced via electrochemical water splitting using clean electric energy by the hydrogen evolution reaction(HER)process.The ultimate goal of HER catalyst is to replace the expensi... As a zero-carbon fuel,hydrogen can be produced via electrochemical water splitting using clean electric energy by the hydrogen evolution reaction(HER)process.The ultimate goal of HER catalyst is to replace the expensive Pt metal benchmark with a cheap one with equivalent activities.In this work,we investigated the possibility of HER process on single-atom catalysts(SACs)doped on two-dimensional(2D)GaPS_(4)materials,which have a large intrinsic band gap that can be regulated by doping and tensile strain.Based on the machine learning regression analysis,we can expand the prediction of HER performance to more catalysts without expensive DFT calculation.The electron affinity and first ionization energy are the two most important descriptors related to the HER behavior.Furthermore,constrain molecular dynamics with solvation models and constant potentials were applied to understand the dynamics barrier of HER process of Pt SAC on GaPS_(4)materials.These findings not only provide important insights into the catalytic properties of single-atom catalysts on GaPS_(4)2D materials,but also provides theoretical guidance paradigm for exploration of new catalysts. 展开更多
关键词 Two-dimensional GaPS_(4) Hydrogen evolution reaction Single-atom catalysis First-principles calculation Machine learning
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Central Extensions and Deformations of Lie Triple Systems with a Derivation 被引量:2
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作者 Shuangjian GUO 《Journal of Mathematical Research with Applications》 CSCD 2022年第2期189-198,共10页
In this paper, we consider Lie triple systems with derivations. A pair consisting of a Lie triple system and a distinguished derivation is called a LietsDer pair. We define a cohomology theory for LietsDer pair with c... In this paper, we consider Lie triple systems with derivations. A pair consisting of a Lie triple system and a distinguished derivation is called a LietsDer pair. We define a cohomology theory for LietsDer pair with coefficients in a representation. We study central extensions of a LietsDer pair. In the next, we generalize the formal deformation theory to LietsDer pairs in which we deform both the Lie triple system bracket and the distinguished derivation. It is governed by the cohomology of LietsDer pair with coefficients in itself. 展开更多
关键词 Lie triple system DERIVATION REPRESENTATION COHOMOLOGY central extension DEFORMATION
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GIS-based spatial differentiation of ethnic minority villages in Guizhou Province,China 被引量:2
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作者 ZHENG Guang-hui JIANG Di-fei +1 位作者 LUAN Yong-fei YAO Yao 《Journal of Mountain Science》 SCIE CSCD 2022年第4期987-1000,共14页
The protection and development problems in ethnic minority villages have received great attention from the Chinese government.This study aims to systematically identify the spatial differentiation characteristics of e... The protection and development problems in ethnic minority villages have received great attention from the Chinese government.This study aims to systematically identify the spatial differentiation characteristics of ethnic minority villages and their influencing factors in Guizhou Province.Applying ArcGIS and GeoDa,a total of 1,014 ethnic minority villages in the four batches announced by the Ethnic and Religious Affairs Commission of Guizhou Province(272in the first batch,240 in the second batch,255 in the third batch,and 247 in the fourth batch)served as the research objects.Utilizing the economic development data in Guizhou Statistical Yearbook 2018-2020 for analysis,the coupling calculation of the spatial layout and economic development level of ethnic minority villages was conducted.The results indicate that the number of ethnic minority village points varies in spatial distribution with remarkable agglomeration.The spatial equilibrium distribution of ethnic minority villages in the province is imbalanced.The kernel density is characterized by independent single kernel centers with sporadic distributions of subcenters and an echelon distribution whole.The spatial complexity distribution indicates that ethnic minority villages in Guizhou possess unequal characteristics,and the fractal of the system structure is more complicated.The findings reveal that the spatial distribution of ethnic minority characteristic villages in Guizhou is highly consistent with that of ethnic minorities in Guizhou.The distribution is the combined results of geographical factors and socialeconomic factors.Most ethnic minority characteristic villages in Guizhou Province are located in areas with complex terrain,inconvenient transportation,and relatively backward economic development.Based on the current geospatial distribution of ethnic minority villages,the present study will provide remarkable implications for the Chinese government to implement the Rural Revitalization Strategy from several key aspects.The Chinese government should establish a protection and development mechanism in ethnic minority villages and strive to enhance the characteristics of ethnic cultural industries.Meanwhile,the"integration of culture and tourism"should be taken as the development strategy while the industry should support rural economic development and help eliminate poverty.This is of crucial practical significance to national unity and rural revitalization in China. 展开更多
关键词 Guizhou Province Ethnic villages Spatial differentiation SUSTAINABILITY
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Derivations and Deformations of Lie-Yamaguti Color Algebras 被引量:2
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作者 Wen TENG Taijie YOU 《Journal of Mathematical Research with Applications》 CSCD 2022年第1期15-30,共16页
In this paper,we introduce the representation and cohomology theory of Lie-Yamaguti color algebras.Furthermore,we introduce the notions of generalized derivations of Lie-Yamaguti color algebras and present some proper... In this paper,we introduce the representation and cohomology theory of Lie-Yamaguti color algebras.Furthermore,we introduce the notions of generalized derivations of Lie-Yamaguti color algebras and present some properties.Finally,we study linear deformations of LieYamaguti color algebras,and introduce the notion of a Nijenhuis operator on a Lie-Yamaguti color algebra,which can generate a trivial deformation. 展开更多
关键词 Lie-Yamaguti color algebra representation COHOMOLOGY DERIVATIONS deformations
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Intact Polar and Core Tetraether Lipids in Sediments from the Haiyang 4 Cold-seep of the Northern South China Sea and their Implications 被引量:1
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作者 LI Yuejiao SU Xin +2 位作者 JIAO Lu CHEN Fang CHENG Sihai 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2022年第2期691-700,共10页
A number of cold seeps have been discovered in the northern South China Sea(SCS) including the Haiyang 4 cold-seep area where Core 973-5 was collected. Intact polar lipids(IPLs) and core lipids(CLs) were analyzed sepa... A number of cold seeps have been discovered in the northern South China Sea(SCS) including the Haiyang 4 cold-seep area where Core 973-5 was collected. Intact polar lipids(IPLs) and core lipids(CLs) were analyzed separately in sediments from Core 973-5. The most abundant lipid biomarkers were isoprenoidal GDGTs(iso GDGTs), with Crenarchaeol and GDGT-0 predominating. IPL-iso GDGTs and CL-iso GDGTs were mainly derived from Thaumarchaeota. IPL-iso GDGTs were mainly produced and retained in situ thus containing most of the in situ microbiological information. Branched GDGTs were predominantly derived from generated in marine production, and mixed with some terrestrial inputs. All IPLs groups presented a high value in the sulfate-methane transition zone(SMTZ). Furthermore, IPL and CL-MI, IPL-R;showed the highest values within the SMTZ, while IPL and CL-R;had the lowest values at the SMTZ, suggesting that the contribution of Methanophila and methanogenic to GDGTs increased, while the contribution of ammonia-oxidizing Archaea to GDGTs decreased at the SMTZ. 展开更多
关键词 GDGTs IPLs SMTZ source Core 973-5 Haiyang 4 Cold-seep South China Sea
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Effect of initial crystallization temperature and surface diffusion on formation of GaAs multiple concentric nanoring structures by droplet epitaxy 被引量:1
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作者 Yi Wang Xiang Guo +4 位作者 Jiemin Wei Chen Yang Zijiang Luo Jihong Wang Zhao Ding 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第4期391-396,共6页
GaAs multiple concentric nano-ring structures(CNRs)are prepared with multistep crystallization procedures by droplets epitaxy on GaAs(001)to explore the influence of different initial crystallization temperatures on C... GaAs multiple concentric nano-ring structures(CNRs)are prepared with multistep crystallization procedures by droplets epitaxy on GaAs(001)to explore the influence of different initial crystallization temperatures on CNRs morphology.Atomic force microscope(AFM)images show that GaAs nanostructures are more likely to form elliptical rings due to diffusion anisotropy.Meanwhile,with the increase of initial crystallization temperature,the inner ring height and density of CNRs are increased,and outer rings are harder to form.In addition,the mechanism of formation of CNRs is discussed by classical nucleation theory and diffusion theory.The method can be used to calculate the diffusion activation energy of gallium atoms(0.7±0.1 eV)on the GaAs(001)surface conveniently. 展开更多
关键词 CONCENTRIC nano-ring structures CRYSTALLIZATION temperature ACTIVATION energy of diffusion
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The Evolution of Urban and Rural Construction Land Based on Spatial Econometrics:A Case Study of Bijie City 被引量:1
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作者 CHEN Xiao-zhu WANG Bo CHEN Xiao-yuan 《Asian Agricultural Research》 2012年第11期59-61,共3页
Based on the theory of spatial econometrics,we test and process the urban and rural construction land data during the base period of planning and late period of planning in Bijie City.And we conduct comparative analys... Based on the theory of spatial econometrics,we test and process the urban and rural construction land data during the base period of planning and late period of planning in Bijie City.And we conduct comparative analysis of the spatial pattern and evolution characteristics of urban and rural construction land in 41 towns of Bijie City before and after the planning.According to Getis-ord G i coefficient test results,the cold spot area of urban and rural construction land in northeast of Bijie City will gradually disappear,and the key point of hot spot area will be gradually transferred from the central region to the central and eastern regions.The results show that under the guidance of the overall land use planning in Bijie City,the urban and rural construction land will show strong spatial autocorrelation;agglomeration benefits and scale merit will appear clearly,in line with the actual situation of current development of Bijie City. 展开更多
关键词 URBAN and RURAL construction LAND SPATIAL economet
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